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v3_kernel, - v3_kernel_pp, - v3_life + v3_kernel_pp ]}, {registered, []}, {applications, [kernel, stdlib]}, diff --git a/bootstrap/lib/compiler/ebin/v3_codegen.beam b/bootstrap/lib/compiler/ebin/v3_codegen.beam Binary files differindex e7cbc758f1..09ff7b253d 100644 --- a/bootstrap/lib/compiler/ebin/v3_codegen.beam +++ b/bootstrap/lib/compiler/ebin/v3_codegen.beam diff --git a/bootstrap/lib/compiler/ebin/v3_kernel.beam b/bootstrap/lib/compiler/ebin/v3_kernel.beam Binary files differindex 2286d9a646..56af498763 100644 --- a/bootstrap/lib/compiler/ebin/v3_kernel.beam +++ b/bootstrap/lib/compiler/ebin/v3_kernel.beam diff --git a/bootstrap/lib/compiler/ebin/v3_kernel_pp.beam b/bootstrap/lib/compiler/ebin/v3_kernel_pp.beam Binary files differindex e1b8c58c8f..b67d012f34 100644 --- a/bootstrap/lib/compiler/ebin/v3_kernel_pp.beam +++ b/bootstrap/lib/compiler/ebin/v3_kernel_pp.beam diff --git a/bootstrap/lib/compiler/ebin/v3_life.beam b/bootstrap/lib/compiler/ebin/v3_life.beam Binary files 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12ef4aab8a..0b7f361622 100644 --- a/erts/emulator/beam/erl_process_dump.c +++ b/erts/emulator/beam/erl_process_dump.c @@ -728,8 +728,15 @@ static void mark_literal(Eterm* ptr) ap = bsearch(ptr, lit_areas, num_lit_areas, sizeof(ErtsLiteralArea*), search_areas); - ASSERT(ap); - ap[0]->off_heap = (struct erl_off_heap_header *) 1; + + /* + * If the literal was created by native code, this search will not + * find it and ap will be NULL. + */ + + if (ap) { + ap[0]->off_heap = (struct erl_off_heap_header *) 1; + } } diff --git a/erts/emulator/internal_doc/GarbageCollection.md b/erts/emulator/internal_doc/GarbageCollection.md new file mode 100644 index 0000000000..1d9e3f4160 --- /dev/null +++ b/erts/emulator/internal_doc/GarbageCollection.md @@ -0,0 +1,187 @@ +# Erlang Garbage Collector + +Erlang manages dynamic memory with a [tracing garbage collector](https://en.wikipedia.org/wiki/Tracing_garbage_collection). More precisely a per process generational semi-space copying collector using [Cheney's](#cheney) copy collection algorithm together with a global large object space. + +## Overview + +Each Erlang process has its own stack and heap which are allocated in the same memory block and grow towards each other. When the stack and the heap [meet](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/beam_emu.c#L387), the garbage collector is triggered and memory is reclaimed. If not enough memory was reclaimed, the heap will grow. + +### Creating Data + +Terms are created on the heap by evaluating expressions. There are two major types of terms: [immediate terms](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_term.h#L88-L97) which require no heap space (small integers, atoms, pids, port ids etc) and cons or [boxed terms](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_term.h#L106-L120) (tuple, big num, binaries etc) that do require heap space. Immediate terms do not need any heap space because they are embedded into the containing structure. + +Let's look at an example that returns a tuple with the newly created data. + +```erlang +data(Foo) -> + Cons = [42|Foo], + Literal = {text, "hello world!"}, + {tag, Cons, Literal}. +``` + +In this example we first create a new cons cell with an integer and a tuple with some text. Then a tuple of size three wrapping the other values with an atom tag is created and returned. + +On the heap tuples require a word size for each of its elements as well as for the header. Cons cells always require two words. Adding these things together, we get seven words for the tuples and 26 words for the cons cells. The string `"hello world!"` is a list of cons cells and thus requires 24 words. The atom `tag` and the integer `42` do not require any additional heap memory since it is an *immediate*. Adding all the terms together, the heap space required in this example should be 33 words. + +Compiling this code to beam assembly (`erlc -S`) shows exactly what is happening. + +```erlang + ... + {test_heap,6,1}. + {put_list,{integer,42},{x,0},{x,1}}. + {put_tuple,3,{x,0}}. + {put,{atom,tag}}. + {put,{x,1}}. + {put,{literal,{text,"hello world!"}}}. + return. +``` + +Looking at the assembler code we can see three things; The heap requirement in this function turns out to be only six words, as seen by the `{test_heap,6,1}` instruction. All the allocations are combined to a single instruction. The bulk of the data `{text, "hello world!"}` is a *literal*. Literals, sometimes referred to as constants, are not allocated in the function since they are a part of the module and allocated at load time. + +If there is not enough space available on the heap to satisfy the `test_heap` instructions request for memory, then a garbage collection is initiated. It may happen immediately in the `test_heap` instruction, or it can be delayed until a later time depending on what state the process is in. If the garbage collection is delayed, any memory needed will be allocated in heap fragments. Heap fragments are extra memory blocks that are a part of the young heap, but are not allocated in the contigious area where terms normally reside. See [The young heap](#the-young-heap) for more details. + +### The collector + +Erlang has a copying semi-space garbage collector. This means that when doing a garbage collection, the terms are copied from one distinct area, called the *from space*, to a new clean area, called the *to space*. The collector starts by [scanning the root-set](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_gc.c#L1980) (stack, registers, etc). + + + +It follows all the pointers from the root-set to the heap and copies each term word by word to the *to space*. + +After the header word has been copied a [*move marker*](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_gc.h#L45-L46) is destructively placed in it pointing to the term in the *to space*. Any other term that points to the already moved term will [see this move marker](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_gc.c#L1125) and copy the referring pointer instead. For example, if the have the following Erlang code: + +```erlang +foo(Arg) -> + T = {test, Arg}, + {wrapper, T, T, T}. +``` + +Only one copy of T exists on the heap and during the garbage collection only the first time T is encountered will it be copied. + + + +After [all terms](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_gc.c#L1089) referenced by the root-set have been copied, the collector scans the *to space* and copies all terms that these terms reference. When scanning, the collector steps through each term on the *to space* and any term still referencing the *from space* is copied over to the *to space*. Some terms contain non-term data (the payload of a on heap binary for instance). When encountered by the collector, these values are simply skipped. + + + +Every term object we can reach is copied to the *to space* and stored on top off the *scan stop* line, and then the scan stop is moved to the end of the last object. + + + +When *scan stop* marker [catches up](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_gc.c#L1103) to the *scan start* marker, the garbage collection is done. At this point we can [deallocate](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_gc.c#L1206) the entire *from space* and therefore reclaim the entire young heap. + +## Generational Garbage Collection + +In addition to the collection algorithm described above, the Erlang garbage collector also provides generational garbage collection. An additional heap, called the old heap, is used where the long lived data is stored. The original heap is called the young heap, or sometimes the allocation heap. + +With this in mind we can look at the Erlang's garbage collection again. During the copy stage anything that should be copied to the young *to space* is instead copied to the old *to space* *if* it is [below the *high-watermark*](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_gc.c#L1127). + + + +The [*high-watermark*](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_process.h#L1021) is placed where the previous garbage collection (described in [Overview](#overview)) ended and we have introduced a new area called the old heap. When doing the normal garbage collection pass, any term that is located below the high-watermark is copied to the old *to space* instead of the young. + + + +In the next garbage collection, any pointers to the old heap will be ignored and not scanned. This way the garbage collector does not have to scan the long-lived terms. + +Generational garbage collection aims to increase performance at the expense of memory. This is achieved because only the young, smaller, heap is considered in most garbage collections. + +The generational [hypothesis](#ungar) predicts that most terms tend to die young, and for an immutable language such as Erlang, young terms die even faster than in other languages. So for most usage patterns the data in the new heap will die very soon after it is allocated. This is good because it limits the amount of data copied to the old heap and also because the garbage collection algorithm used is proportional to the amount of live data on the heap. + +One critical issue to note here is that any term on the young heap can reference terms on the old heap but *no* term on the old heap may refer to a term on the young heap. This is due to the nature of the copy algorithm. Anything referenced by an old heap term is not included in the reference tree, root-set and its followers, and hence is not copied. If it was, the data would be lost, fire and brimstone would rise to cover the earth. Fortunately, this comes naturally for Erlang because the terms are immutable and thus there can be no pointers modified on the old heap to point to the young heap. + +To reclaim data from the old heap, both young and old heaps are included during the collection and copied to a common *to space*. Both the *from space* of the young and old heap are then deallocated and the procedure will start over from the beginning. This type of garbage collection is called a full sweep and is triggered when the size of the area under the high-watermark is larger than the size of the free area of the old heap. It can also be triggered by doing a manual call to [erlang:garbage_collect()](http://erlang.org/doc/man/erlang.html#garbage_collect-0), or by running into the young garbage collection limit set by [spawn_opt(fun(),[{fullsweep_after, N}])](http://erlang.org/doc/man/erlang.html#spawn_opt-4) where N is the number of young garbage collections to do before forcing a garbage collection of both young and old heap. + +## The young heap + +The young heap, or the allocation heap, consists of the stack and heap as described in the Overview. However, it also includes any heap fragments that are attached to the heap. All of the heap fragments are considered to be above the high-watermark and part of the young generation. Heap fragments contain terms that either did not fit on the heap, or were created by another process and then attached to the heap. For instance if the bif binary_to_term created a term which does not fit on the current heap without doing a garbage collection, it will create a heap-fragment for the term and then schedule a garbage collection for later. Also if a message is sent to the process, the payload may be placed in a heap-fragment and that fragment is added to young heap when the message is matched in a receive clause. + +This procedure differs from how it worked prior to Erlang/OTP 19.0. Before 19.0, only a contiguous memory block where the young heap and stack resided was considered to be part of the young heap. Heap fragments and messages were immediately copied into the young heap before they could be inspected by the Erlang program. The behaviour introduced in 19.0 is superior in many ways - most significantly it reduces the number of necessary copy operations and the root set for garbage collection. + +## Sizing the heap + +As mentioned in the Overview the size of the heap [grows](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_gc.c#L247) to accommodate more data. Heaps grow in two stages, first a [variation of the Fibonacci sequence](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_gc.c#L199-L208) is used starting at 233 words. Then at about 1 mega words the heap only [grows in 20% increments](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_gc.c#L215-L227). + +There are two occasions when the young heap grows: + +* if the total size of the heap + message and heap fragments exceeds the current heap size. +* if after a fullsweep, the total amount of live objects is greater than 75%. + +There are two occasions when the young heap is shrunk: + +* if after a young collection, the total amount of live objects is less than 25% of the heap and the young heap is "big" +* if after a fullsweep, the total amount of live objects is less than 25% of the heap. + +The old heap is always one step ahead in the heap growth stages than the young heap. + +## Literals + +When garbage collecting a heap (young or old) all literals are left in place and not copied. To figure out if a term should be copied or not when doing a garbage collection the following pseudo code is used: + +```c +if (erts_is_literal(ptr) || (on_old_heap(ptr) && !fullsweep)) { + /* literal or non fullsweep - do not copy */ +} else { + copy(ptr); +} +``` + +The [`erts_is_literal`](https://github.com/erlang/otp/blob/OTP-19.0/erts/emulator/beam/global.h#L1452-L1465) check works differently on different architectures and operating systems. + +On 64 bit systems that allow mapping of unreserved virtual memory areas (most operating systems except Windows), an area of size 1 GB (by default) is mapped and then all literals are placed within that area. Then all that has to be done to determine if something is a literal or not is [two quick pointer checks](https://github.com/erlang/otp/blob/OTP-19.0/erts/emulator/beam/erl_alloc.h#L322-L324). This system relies on the fact that a memory page that has not been touched yet does not take any actual space. So even if 1 GB of virtual memory is mapped, only the memory which is actually needed for literals is allocated in ram. The size of the literal area is configurable through the +MIscs erts_alloc option. + +On 32 bit systems, there is not enough virtual memory space to allocate 1 GB for just literals, so instead small 256 KB sized literal regions are created on demand and a card mark bit-array of the entire 32 bit memory space is then used to determine if a term is a literal or not. Since the total memory space is only 32 bits, the card mark bit-array is only 256 words large. On a 64 bit system the same bit-array would have to be 1 tera words large, so this technique is only viable on 32 bit systems. Doing [lookups in the array](https://github.com/erlang/otp/blob/OTP-19.0/erts/emulator/beam/erl_alloc.h#L316-L319) is a little more expensive then just doing the pointer checks that can be done in 64 bit systems, but not extremely so. + +On 64 bit windows, on which erts_alloc cannot do unreserved virtual memory mappings, a [special tag](https://github.com/erlang/otp/blob/OTP-19.0/erts/emulator/beam/erl_term.h#L59) within the Erlang term object is used to determine if something [is a literal or not](https://github.com/erlang/otp/blob/OTP-19.0/erts/emulator/beam/erl_term.h#L248-L252). This is very cheap, however, the tag is only available on 64 bit machines, and it is possible to do a great deal of other nice optimizations with this tag in the future (like for instance a more compact list implementation) so it is not used on operating systems where it is not needed. + +This behaviour is different from how it worked prior to Erlang/OTP 19.0. Before 19.0 the literal check was done by checking if the pointer pointed to the young or old heap block. If it did not, then it was considered a literal. This lead to considerable overhead and strange memory usage scenarios, so it was removed in 19.0. + +## Binary heap + +The binary heap works as a large object space for binary terms that are greater than 64 bytes (from now on called off-heap binaries). The binary heap is [reference counted](https://en.wikipedia.org/wiki/Reference_counting) and a pointer to the off-heap binary is stored on the process heap. To keep track of when to decrement the reference counter of the off-heap binary, a linked list (the MSO - mark and sweep object list) containing funs and externals as well as off-heap binaries is woven through the heap. After a garbage collection is done, the [MSO list is swept](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_gc.c#L2299) and any off-heap binary that does not have a [move marker](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_gc.c#L2325) written into the header words has its reference [decremented and is potentially freed](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_gc.c#L2344-L2367). + +All items in the MSO list are ordered by the time they were added to the process heap, so when doing a minor garbage collection, the MSO sweeper only has to sweep until it [encounters an off-heap binary that is on the old heap](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_gc.c#L2369). + +### Virtual Binary heap + +Each process has a virtual binary heap associated with it that has the size of all the current off-heap binaries that the process has references to. The virtual binary heap also has a limit and grows and shrinks depending on how off-heap binaries are used by the process. The same growth and shrink mechanisms are used for the binary heap and for the term heap, so first a Fibonacci like series and then 20% growth. + +The virtual binary heap exists in order to [trigger](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/beam_emu.c#L364) garbage collections earlier when potentially there is a very large amount of off-heap binary data that could be reclaimed. This approach does not catch all problems with binary memory not being released soon enough, but it does catch a lot of them. + +## Messages + +Messages can become a part of the process heap at different times. This depends on how the process is configured. +We can configure the behaviour of each process using `process_flag(message_queue_data, off_heap | on_heap)` or we can set a default for all processes at start using the option `+hmqd`. + +What do these different configurations do and when should we use them? +Let's start by going through what happens when one Erlang process sends a message to another. +The sending process needs to do a couple of things: + +1. calculate [how large](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_message.c#L1031) the message to be sent is +2. [allocate enough space](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_message.c#L1033) to fit the entire message +3. [copy](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_message.c#L1040) the message payload +4. allocate a message container with some meta data +5. [insert](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_message.c#L502) the message container in the receiver process' [message queue](https://github.com/erlang/otp/blob/OTP-18.0/erts/emulator/beam/erl_process.h#L1042) + +The process flag `message_queue_data`, of the receiver process, controls the message allocating strategy of the sender process in step 2 and also how the message data is treated by the garbage collector. + +The procedure above is different from how it worked prior to 19.0. Before 19.0 there was no configuration option, the behaviour was always very similar to how the `on_heap` option is in 19.0. + +### Message allocating strategies + +If set to `on_heap`, the sending process will first attempt to allocate the space for the message directly on the young heap block of the receiving process. +This is not always possible as it requires taking the *main lock* of the receiving process. The main lock is also held when the process is executing. The possibility for a lock conflict is thus likely in an intensely collaborating system. +If the sending process cannot acquire the main lock, a heap fragment is instead created for the message and the message payload is copied onto that. +With the `off_heap` option the sender process always creates heap fragments for messages sent to that process. + +There are a bunch of different tradeoffs that come into play when trying to figure out which of the strategies you want to use. + +Using `off_heap` may seem like a nice way to get a more scalable system as you get very little contention on the main locks, however, allocating a heap fragment is more expensive than allocating on the heap of the receiving process. So if it is very unlikely that contention will occur, it is more efficient to try to allocate the message directly on the receiving process' heap. + +Using `on_heap` will force all messages to be part of on the young heap which will increase the amount of data that the garbage collector has to move. So if a garbage collection is triggered while processing a large amount of messages, they will be copied to the young heap. This in turn will lead to that the messages will quickly be promoted to the old heap and thus increase its size. This may be good or bad depending on exactly what the process does. A large old heap means that the young heap will also be larger, which in turn means that less garbage collections will be triggered while processing the message queue. This will temporarly increase the throughput of the process at the cost of more memory usage. However, if after all the messages have been consumed the process enters a state where a lot less messages are being received. Then it may be a long time before the next fullsweep garbage collection happens and the messages that are on the old heap will be there until that happens. So while `on_heap` is potentially faster than the other modes, it uses more memory for a longer time. This mode is the legacy mode which is almost how the message queue was handled before Erlang/OTP 19.0. + +Which one of these strategies is best depends a lot on what the process is doing and how it interacts with other processes. So, as always, profile the application and see how it behaves with the different options. + + <a name="cheney">[1]</a>: C. J. Cheney. A nonrecursive list compacting algorithm. Commun. ACM, 13(11):677–678, Nov. 1970. + + <a name="ungar">[2]</a>: D. Ungar. Generation scavenging: A non-disruptive high performance storage reclamation algorithm. SIGSOFT Softw. Eng. Notes, 9(3):157–167, Apr. 1984. diff --git a/erts/emulator/internal_doc/figures/.gitignore b/erts/emulator/internal_doc/figures/.gitignore new file mode 100644 index 0000000000..c2813ac866 --- /dev/null +++ b/erts/emulator/internal_doc/figures/.gitignore @@ -0,0 +1 @@ +*.eps
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v3_kernel_pp \ - v3_life + v3_kernel_pp BEAM_H = $(wildcard ../priv/beam_h/*.h) HRL_FILES= \ beam_disasm.hrl \ core_parse.hrl \ - v3_kernel.hrl \ - v3_life.hrl + v3_kernel.hrl YRL_FILE = core_parse.yrl @@ -187,7 +185,7 @@ release_docs_spec: # ---------------------------------------------------- $(EBIN)/beam_disasm.beam: $(EGEN)/beam_opcodes.hrl beam_disasm.hrl -$(EBIN)/beam_listing.beam: v3_life.hrl +$(EBIN)/beam_listing.beam: core_parse.hrl v3_kernel.hrl $(EBIN)/beam_validator.beam: beam_disasm.hrl $(EBIN)/cerl.beam: core_parse.hrl $(EBIN)/compile.beam: core_parse.hrl ../../stdlib/include/erl_compile.hrl @@ -200,8 +198,7 @@ $(EBIN)/sys_core_dsetel.beam: core_parse.hrl $(EBIN)/sys_core_fold.beam: core_parse.hrl $(EBIN)/sys_core_fold_lists.beam: core_parse.hrl $(EBIN)/sys_core_inline.beam: core_parse.hrl -$(EBIN)/v3_codegen.beam: v3_life.hrl +$(EBIN)/v3_codegen.beam: v3_kernel.hrl $(EBIN)/v3_core.beam: core_parse.hrl $(EBIN)/v3_kernel.beam: core_parse.hrl v3_kernel.hrl $(EBIN)/v3_kernel_pp.beam: v3_kernel.hrl -$(EBIN)/v3_life.beam: v3_kernel.hrl v3_life.hrl diff --git a/lib/compiler/src/beam_listing.erl b/lib/compiler/src/beam_listing.erl index 94b47cf568..9422f9a78a 100644 --- a/lib/compiler/src/beam_listing.erl +++ b/lib/compiler/src/beam_listing.erl @@ -23,14 +23,12 @@ -include("core_parse.hrl"). -include("v3_kernel.hrl"). --include("v3_life.hrl"). -import(lists, [foreach/2]). -type code() :: cerl:c_module() | beam_utils:module_code() | #k_mdef{} - | {module(),_,_,_} %v3_life | [_]. %form-based format -spec module(file:io_device(), code()) -> 'ok'. @@ -42,13 +40,9 @@ module(File, #k_mdef{}=Kern) -> %% This is a kernel module. io:put_chars(File, v3_kernel_pp:format(Kern)); %%io:put_chars(File, io_lib:format("~p~n", [Kern])); -module(File, {Mod,Exp,Attr,Kern}) -> - %% This is output from beam_life (v3). - io:fwrite(File, "~w.~n~p.~n~p.~n", [Mod,Exp,Attr]), - foreach(fun (F) -> function(File, F) end, Kern); module(Stream, {Mod,Exp,Attr,Code,NumLabels}) -> - %% This is output from beam_codegen. - io:format(Stream, "{module, ~p}. %% version = ~w\n", + %% This is output from v3_codegen. + io:format(Stream, "{module, ~p}. %% version = ~w\n", [Mod, beam_opcodes:format_number()]), io:format(Stream, "\n{exports, ~p}.\n", [Exp]), io:format(Stream, "\n{attributes, ~p}.\n", [Attr]), @@ -68,60 +62,3 @@ format_asm([{label,L}|Is]) -> format_asm([I|Is]) -> [io_lib:format(" ~p", [I]),".\n"|format_asm(Is)]; format_asm([]) -> []. - -function(File, {function,Name,Arity,Args,Body,Vdb,_Anno}) -> - io:nl(File), - io:format(File, "function ~p/~p.\n", [Name,Arity]), - io:format(File, " ~p.\n", [Args]), - print_vdb(File, Vdb), - put(beam_listing_nl, false), - nl(File), - foreach(fun(F) -> format(File, F, []) end, Body), - nl(File), - erase(beam_listing_nl). - -format(File, #l{ke=Ke,i=I,vdb=Vdb}, Ind) -> - nl(File), - ind_format(File, Ind, "~p ", [I]), - print_vdb(File, Vdb), - nl(File), - format(File, Ke, Ind); -format(File, Tuple, Ind) when is_tuple(Tuple) -> - ind_format(File, Ind, "{", []), - format_list(File, tuple_to_list(Tuple), [$\s|Ind]), - ind_format(File, Ind, "}", []); -format(File, List, Ind) when is_list(List) -> - ind_format(File, Ind, "[", []), - format_list(File, List, [$\s|Ind]), - ind_format(File, Ind, "]", []); -format(File, F, Ind) -> - ind_format(File, Ind, "~p", [F]). - -format_list(File, [F], Ind) -> - format(File, F, Ind); -format_list(File, [F|Fs], Ind) -> - format(File, F, Ind), - ind_format(File, Ind, ",", []), - format_list(File, Fs, Ind); -format_list(_, [], _) -> ok. - - -print_vdb(File, [{Var,F,E}|Vs]) -> - io:format(File, "~p:~p..~p ", [Var,F,E]), - print_vdb(File, Vs); -print_vdb(_, []) -> ok. - -ind_format(File, Ind, Format, Args) -> - case get(beam_listing_nl) of - true -> - put(beam_listing_nl, false), - io:put_chars(File, Ind); - false -> ok - end, - io:format(File, Format, Args). - -nl(File) -> - case put(beam_listing_nl, true) of - true -> ok; - false -> io:nl(File) - end. diff --git a/lib/compiler/src/compile.erl b/lib/compiler/src/compile.erl index 1b359d1e59..bc519264fc 100644 --- a/lib/compiler/src/compile.erl +++ b/lib/compiler/src/compile.erl @@ -733,8 +733,6 @@ kernel_passes() -> ?pass(v3_kernel), {iff,dkern,{listing,"kernel"}}, {iff,'to_kernel',{done,"kernel"}}, - {pass,v3_life}, - {iff,dlife,{listing,"life"}}, {pass,v3_codegen}, {iff,dcg,{listing,"codegen"}} | asm_passes()]. @@ -1947,7 +1945,6 @@ pre_load() -> sys_core_fold, v3_codegen, v3_core, - v3_kernel, - v3_life], + v3_kernel], _ = code:ensure_modules_loaded(L), ok. diff --git a/lib/compiler/src/compiler.app.src b/lib/compiler/src/compiler.app.src index 703cf1d1b8..cf32fd251c 100644 --- a/lib/compiler/src/compiler.app.src +++ b/lib/compiler/src/compiler.app.src @@ -68,8 +68,7 @@ v3_codegen, v3_core, v3_kernel, - v3_kernel_pp, - v3_life + v3_kernel_pp ]}, {registered, []}, {applications, [kernel, stdlib]}, diff --git a/lib/compiler/src/v3_codegen.erl b/lib/compiler/src/v3_codegen.erl index ee5bafbc5c..006a6a82d2 100644 --- a/lib/compiler/src/v3_codegen.erl +++ b/lib/compiler/src/v3_codegen.erl @@ -19,25 +19,6 @@ %% %% Purpose : Code generator for Beam. -%% The following assumptions have been made: -%% -%% 1. Matches, i.e. things with {match,M,Ret} wrappers, only return -%% values; no variables are exported. If the match would have returned -%% extra variables then these have been transformed to multiple return -%% values. -%% -%% 2. All BIF's called in guards are gc-safe so there is no need to -%% put thing on the stack in the guard. While this would in principle -%% work it would be difficult to keep track of the stack depth when -%% trimming. -%% -%% The code generation uses variable lifetime information added by -%% the v3_life module to save variables, allocate registers and -%% move registers to the stack when necessary. -%% -%% We try to use a consistent variable name scheme throughout. The -%% StackReg record is always called Bef,Int<n>,Aft. - -module(v3_codegen). %% The main interface. @@ -45,12 +26,14 @@ -import(lists, [member/2,keymember/3,keysort/2,keydelete/3, append/1,flatmap/2,filter/2,foldl/3,foldr/3,mapfoldl/3, - sort/1,reverse/1,reverse/2]). --import(v3_life, [vdb_find/2]). + sort/1,reverse/1,reverse/2,map/2]). +-import(ordsets, [add_element/2,intersection/2,union/2]). -%%-compile([export_all]). +-include("v3_kernel.hrl"). --include("v3_life.hrl"). +%% These are not defined in v3_kernel.hrl. +get_kanno(Kthing) -> element(2, Kthing). +set_kanno(Kthing, Anno) -> setelement(2, Kthing, Anno). %% Main codegen structure. -record(cg, {lcount=1, %Label counter @@ -61,38 +44,273 @@ functable=#{}, %Map of local functions: {Name,Arity}=>Label in_catch=false, %Inside a catch or not. need_frame, %Need a stack frame. - ultimate_failure %Label for ultimate match failure. - }). + ultimate_failure, %Label for ultimate match failure. + ctx %Match context. + }). %% Stack/register state record. -record(sr, {reg=[], %Register table stk=[], %Stack table res=[]}). %Reserved regs: [{reserved,I,V}] --type life_module() :: {module(),_,_,[_]}. +%% Internal records. +-record(cg_need_heap, {anno=[] :: term(), + h=0 :: integer()}). +-record(cg_block, {anno=[] :: term(), + es=[] :: [term()]}). + +-type vdb_entry() :: {atom(),non_neg_integer(),non_neg_integer()}. + +-record(l, {i=0 :: non_neg_integer(), %Op number + vdb=[] :: [vdb_entry()], %Variable database + a=[] :: [term()]}). %Core annotation --spec module(life_module(), [compile:option()]) -> {'ok',beam_asm:module_code()}. +-spec module(#k_mdef{}, [compile:option()]) -> {'ok',beam_asm:module_code()}. -module({Mod,Exp,Attr,Forms}, _Options) -> - {Fs,St} = functions(Forms, {atom,Mod}), - {ok,{Mod,Exp,Attr,Fs,St#cg.lcount}}. +module(#k_mdef{name=Mod,exports=Es,attributes=Attr,body=Forms}, _Opts) -> + {Asm,St} = functions(Forms, {atom,Mod}), + {ok,{Mod,Es,Attr,Asm,St#cg.lcount}}. functions(Forms, AtomMod) -> mapfoldl(fun (F, St) -> function(F, AtomMod, St) end, #cg{lcount=1}, Forms). -function({function,Name,Arity,Asm0,Vb,Vdb,Anno}, AtomMod, St0) -> +function(#k_fdef{anno=#k{a=Anno},func=Name,arity=Arity, + vars=As,body=Kb}, AtomMod, St0) -> try - {Asm,EntryLabel,St} = cg_fun(Vb, Asm0, Vdb, AtomMod, - {Name,Arity}, Anno, St0), - Func = {function,Name,Arity,EntryLabel,Asm}, - {Func,St} + %% Annotate kernel records with variable usage. + #k_match{} = Kb, %Assertion. + Vdb0 = init_vars(As), + {Body,_,Vdb} = body(Kb, 1, Vdb0), + + %% Generate the BEAM assembly code. + {Asm,EntryLabel,St} = cg_fun(Body, As, Vdb, AtomMod, + {Name,Arity}, Anno, St0), + Func = {function,Name,Arity,EntryLabel,Asm}, + {Func,St} catch - Class:Error -> - Stack = erlang:get_stacktrace(), - io:fwrite("Function: ~w/~w\n", [Name,Arity]), - erlang:raise(Class, Error, Stack) + Class:Error -> + Stack = erlang:get_stacktrace(), + io:fwrite("Function: ~w/~w\n", [Name,Arity]), + erlang:raise(Class, Error, Stack) end. +%% This pass creates beam format annotated with variable lifetime +%% information. Each thing is given an index and for each variable we +%% store the first and last index for its occurrence. The variable +%% database, VDB, attached to each thing is only relevant internally +%% for that thing. +%% +%% For nested things like matches the numbering continues locally and +%% the VDB for that thing refers to the variable usage within that +%% thing. Variables which live through a such a thing are internally +%% given a very large last index. Internally the indexes continue +%% after the index of that thing. This creates no problems as the +%% internal variable info never escapes and externally we only see +%% variable which are alive both before or after. +%% +%% This means that variables never "escape" from a thing and the only +%% way to get values from a thing is to "return" them, with 'break' or +%% 'return'. Externally these values become the return values of the +%% thing. This is no real limitation as most nested things have +%% multiple threads so working out a common best variable usage is +%% difficult. + +%% body(Kbody, I, Vdb) -> {[Expr],MaxI,Vdb}. +%% Handle a body. + +body(#k_seq{arg=Ke,body=Kb}, I, Vdb0) -> + %%ok = io:fwrite("life ~w:~p~n", [?LINE,{Ke,I,Vdb0}]), + A = get_kanno(Ke), + Vdb1 = use_vars(union(A#k.us, A#k.ns), I, Vdb0), + {Es,MaxI,Vdb2} = body(Kb, I+1, Vdb1), + E = expr(Ke, I, Vdb2), + {[E|Es],MaxI,Vdb2}; +body(Ke, I, Vdb0) -> + %%ok = io:fwrite("life ~w:~p~n", [?LINE,{Ke,I,Vdb0}]), + A = get_kanno(Ke), + Vdb1 = use_vars(union(A#k.us, A#k.ns), I, Vdb0), + E = expr(Ke, I, Vdb1), + {[E],I,Vdb1}. + +%% expr(Kexpr, I, Vdb) -> Expr. + +expr(#k_test{anno=A}=Test, I, _Vdb) -> + Test#k_test{anno=#l{i=I,a=A#k.a}}; +expr(#k_call{anno=A}=Call, I, _Vdb) -> + Call#k_call{anno=#l{i=I,a=A#k.a}}; +expr(#k_enter{anno=A}=Enter, I, _Vdb) -> + Enter#k_enter{anno=#l{i=I,a=A#k.a}}; +expr(#k_bif{anno=A}=Bif, I, _Vdb) -> + Bif#k_bif{anno=#l{i=I,a=A#k.a}}; +expr(#k_match{anno=A,body=Kb,ret=Rs}, I, Vdb) -> + %% Work out imported variables which need to be locked. + Mdb = vdb_sub(I, I+1, Vdb), + M = match(Kb, A#k.us, I+1, Mdb), + L = #l{i=I,vdb=use_vars(A#k.us, I+1, Mdb),a=A#k.a}, + #k_match{anno=L,body=M,ret=Rs}; +expr(#k_guard_match{anno=A,body=Kb,ret=Rs}, I, Vdb) -> + %% Work out imported variables which need to be locked. + Mdb = vdb_sub(I, I+1, Vdb), + M = match(Kb, A#k.us, I+1, Mdb), + L = #l{i=I,vdb=use_vars(A#k.us, I+1, Mdb),a=A#k.a}, + #k_guard_match{anno=L,body=M,ret=Rs}; +expr(#k_protected{}=Protected, I, Vdb) -> + protected(Protected, I, Vdb); +expr(#k_try{anno=A,arg=Ka,vars=Vs,body=Kb,evars=Evs,handler=Kh}=Try, I, Vdb) -> + %% Lock variables that are alive before the catch and used afterwards. + %% Don't lock variables that are only used inside the try. + Tdb0 = vdb_sub(I, I+1, Vdb), + %% This is the tricky bit. Lock variables in Arg that are used in + %% the body and handler. Add try tag 'variable'. + Ab = get_kanno(Kb), + Ah = get_kanno(Kh), + Tdb1 = use_vars(union(Ab#k.us, Ah#k.us), I+3, Tdb0), + Tdb2 = vdb_sub(I, I+2, Tdb1), + Vnames = fun (Kvar) -> Kvar#k_var.name end, %Get the variable names + {Aes,_,Adb} = body(Ka, I+2, add_var({catch_tag,I+1}, I+1, locked, Tdb2)), + {Bes,_,Bdb} = body(Kb, I+4, new_vars(sort(map(Vnames, Vs)), I+3, Tdb2)), + {Hes,_,Hdb} = body(Kh, I+4, new_vars(sort(map(Vnames, Evs)), I+3, Tdb2)), + L = #l{i=I,vdb=Tdb1,a=A#k.a}, + Try#k_try{anno=L, + arg=#cg_block{es=Aes,anno=#l{i=I+1,vdb=Adb,a=[]}}, + vars=Vs,body=#cg_block{es=Bes,anno=#l{i=I+3,vdb=Bdb,a=[]}}, + evars=Evs,handler=#cg_block{es=Hes,anno=#l{i=I+3,vdb=Hdb,a=[]}}}; +expr(#k_try_enter{anno=A,arg=Ka,vars=Vs,body=Kb,evars=Evs,handler=Kh}, I, Vdb) -> + %% Lock variables that are alive before the catch and used afterwards. + %% Don't lock variables that are only used inside the try. + Tdb0 = vdb_sub(I, I+1, Vdb), + %% This is the tricky bit. Lock variables in Arg that are used in + %% the body and handler. Add try tag 'variable'. + Ab = get_kanno(Kb), + Ah = get_kanno(Kh), + Tdb1 = use_vars(union(Ab#k.us, Ah#k.us), I+3, Tdb0), + Tdb2 = vdb_sub(I, I+2, Tdb1), + Vnames = fun (Kvar) -> Kvar#k_var.name end, %Get the variable names + {Aes,_,Adb} = body(Ka, I+2, add_var({catch_tag,I+1}, I+1, 1000000, Tdb2)), + {Bes,_,Bdb} = body(Kb, I+4, new_vars(sort(map(Vnames, Vs)), I+3, Tdb2)), + {Hes,_,Hdb} = body(Kh, I+4, new_vars(sort(map(Vnames, Evs)), I+3, Tdb2)), + L = #l{i=I,vdb=Tdb1,a=A#k.a}, + #k_try_enter{anno=L, + arg=#cg_block{es=Aes,anno=#l{i=I+1,vdb=Adb,a=[]}}, + vars=Vs,body=#cg_block{es=Bes,anno=#l{i=I+3,vdb=Bdb,a=[]}}, + evars=Evs,handler=#cg_block{es=Hes,anno=#l{i=I+3,vdb=Hdb,a=[]}}}; +expr(#k_catch{anno=A,body=Kb}=Catch, I, Vdb) -> + %% Lock variables that are alive before the catch and used afterwards. + %% Don't lock variables that are only used inside the catch. + %% Add catch tag 'variable'. + Cdb0 = vdb_sub(I, I+1, Vdb), + {Es,_,Cdb1} = body(Kb, I+1, add_var({catch_tag,I}, I, locked, Cdb0)), + L = #l{i=I,vdb=Cdb1,a=A#k.a}, + Catch#k_catch{anno=L,body=#cg_block{es=Es}}; +expr(#k_receive{anno=A,var=V,body=Kb,action=Ka}=Recv, I, Vdb) -> + %% Work out imported variables which need to be locked. + Rdb = vdb_sub(I, I+1, Vdb), + M = match(Kb, add_element(V#k_var.name, A#k.us), I+1, + new_vars([V#k_var.name], I, Rdb)), + {Tes,_,Adb} = body(Ka, I+1, Rdb), + Le = #l{i=I,vdb=use_vars(A#k.us, I+1, Vdb),a=A#k.a}, + Recv#k_receive{anno=Le,body=M, + action=#cg_block{anno=#l{i=I+1,vdb=Adb,a=[]},es=Tes}}; +expr(#k_receive_accept{anno=A}, I, _Vdb) -> + #k_receive_accept{anno=#l{i=I,a=A#k.a}}; +expr(#k_receive_next{anno=A}, I, _Vdb) -> + #k_receive_next{anno=#l{i=I,a=A#k.a}}; +expr(#k_put{anno=A}=Put, I, _Vdb) -> + Put#k_put{anno=#l{i=I,a=A#k.a}}; +expr(#k_break{anno=A}=Break, I, _Vdb) -> + Break#k_break{anno=#l{i=I,a=A#k.a}}; +expr(#k_guard_break{anno=A}=Break, I, Vdb) -> + Locked = [V || {V,_,_} <- Vdb], + L = #l{i=I,a=A#k.a}, + Break#k_guard_break{anno=L,locked=Locked}; +expr(#k_return{anno=A}=Ret, I, _Vdb) -> + Ret#k_return{anno=#l{i=I,a=A#k.a}}. + +%% protected(Kprotected, I, Vdb) -> Protected. +%% Only used in guards. + +protected(#k_protected{anno=A,arg=Ts}=Prot, I, Vdb) -> + %% Lock variables that are alive before try and used afterwards. + %% Don't lock variables that are only used inside the protected + %% expression. + Pdb0 = vdb_sub(I, I+1, Vdb), + {T,MaxI,Pdb1} = body(Ts, I+1, Pdb0), + Pdb2 = use_vars(A#k.ns, MaxI+1, Pdb1), %Save "return" values + Prot#k_protected{arg=T,anno=#l{i=I,a=A#k.a,vdb=Pdb2}}. + +%% match(Kexpr, [LockVar], I, Vdb) -> Expr. +%% Convert match tree to old format. + +match(#k_alt{anno=A,first=Kf,then=Kt}, Ls, I, Vdb0) -> + Vdb1 = use_vars(union(A#k.us, Ls), I, Vdb0), + F = match(Kf, Ls, I+1, Vdb1), + T = match(Kt, Ls, I+1, Vdb1), + #k_alt{anno=[],first=F,then=T}; +match(#k_select{anno=A,var=V,types=Kts}=Select, Ls0, I, Vdb0) -> + Vanno = get_kanno(V), + Ls1 = case member(no_usage, Vanno) of + false -> add_element(V#k_var.name, Ls0); + true -> Ls0 + end, + Vdb1 = use_vars(union(A#k.us, Ls1), I, Vdb0), + Ts = [type_clause(Tc, Ls1, I+1, Vdb1) || Tc <- Kts], + Select#k_select{anno=[],types=Ts}; +match(#k_guard{anno=A,clauses=Kcs}, Ls, I, Vdb0) -> + Vdb1 = use_vars(union(A#k.us, Ls), I, Vdb0), + Cs = [guard_clause(G, Ls, I+1, Vdb1) || G <- Kcs], + #k_guard{anno=[],clauses=Cs}; +match(Other, Ls, I, Vdb0) -> + Vdb1 = use_vars(Ls, I, Vdb0), + {B,_,Vdb2} = body(Other, I+1, Vdb1), + Le = #l{i=I,vdb=Vdb2,a=[]}, + #cg_block{anno=Le,es=B}. + +type_clause(#k_type_clause{anno=A,type=T,values=Kvs}, Ls, I, Vdb0) -> + %%ok = io:format("life ~w: ~p~n", [?LINE,{T,Kvs}]), + Vdb1 = use_vars(union(A#k.us, Ls), I+1, Vdb0), + Vs = [val_clause(Vc, Ls, I+1, Vdb1) || Vc <- Kvs], + #k_type_clause{anno=[],type=T,values=Vs}. + +val_clause(#k_val_clause{anno=A,val=V,body=Kb}, Ls0, I, Vdb0) -> + New = (get_kanno(V))#k.ns, + Bus = (get_kanno(Kb))#k.us, + %%ok = io:format("Ls0 = ~p, Used=~p\n New=~p, Bus=~p\n", [Ls0,Used,New,Bus]), + Ls1 = union(intersection(New, Bus), Ls0), %Lock for safety + Vdb1 = use_vars(union(A#k.us, Ls1), I+1, new_vars(New, I, Vdb0)), + B = match(Kb, Ls1, I+1, Vdb1), + Le = #l{i=I,vdb=use_vars(Bus, I+1, Vdb1),a=A#k.a}, + #k_val_clause{anno=Le,val=V,body=B}. + +guard_clause(#k_guard_clause{anno=A,guard=Kg,body=Kb}, Ls, I, Vdb0) -> + Vdb1 = use_vars(union(A#k.us, Ls), I+2, Vdb0), + Gdb = vdb_sub(I+1, I+2, Vdb1), + G = protected(Kg, I+1, Gdb), + B = match(Kb, Ls, I+2, Vdb1), + Le = #l{i=I,vdb=use_vars((get_kanno(Kg))#k.us, I+2, Vdb1),a=A#k.a}, + #k_guard_clause{anno=Le,guard=G,body=B}. + + +%% Here follows the code generator pass. +%% +%% The following assumptions have been made: +%% +%% 1. Matches, i.e. things with {match,M,Ret} wrappers, only return +%% values; no variables are exported. If the match would have returned +%% extra variables then these have been transformed to multiple return +%% values. +%% +%% 2. All BIF's called in guards are gc-safe so there is no need to +%% put thing on the stack in the guard. While this would in principle +%% work it would be difficult to keep track of the stack depth when +%% trimming. +%% +%% The code generation uses variable lifetime information added by +%% the previous pass to save variables, allocate registers and +%% move registers to the stack when necessary. +%% +%% We try to use a consistent variable name scheme throughout. The +%% StackReg record is always called Bef,Int<n>,Aft. + %% cg_fun([Lkexpr], [HeadVar], Vdb, State) -> {[Ainstr],State} cg_fun(Les, Hvs, Vdb, AtomMod, NameArity, Anno, St0) -> @@ -114,14 +332,14 @@ cg_fun(Les, Hvs, Vdb, AtomMod, NameArity, Anno, St0) -> %% Note that and 'if_end' instruction does not need any %% live x registers, so it will always be safe to jump to %% it. (We never ever expect the jump to be taken, and in - %% must functions there will never be any references to + %% most functions there will never be any references to %% the label in the first place.) %% {UltimateMatchFail,St3} = new_label(St2), %% Create initial stack/register state, clear unused arguments. - Bef = clear_dead(#sr{reg=foldl(fun ({var,V}, Reg) -> + Bef = clear_dead(#sr{reg=foldl(fun (#k_var{name=V}, Reg) -> put_reg(V, Reg) end, [], Hvs), stk=[]}, 0, Vdb), @@ -136,45 +354,43 @@ cg_fun(Les, Hvs, Vdb, AtomMod, NameArity, Anno, St0) -> %% cg(Lkexpr, Vdb, StackReg, State) -> {[Ainstr],StackReg,State}. %% Generate code for a kexpr. -%% Split function into two steps for clarity, not efficiency. -cg(Le, Vdb, Bef, St) -> - cg(Le#l.ke, Le, Vdb, Bef, St). - -cg({block,Es}, Le, Vdb, Bef, St) -> +cg(#cg_block{anno=Le,es=Es}, Vdb, Bef, St) -> block_cg(Es, Le, Vdb, Bef, St); -cg({match,M,Rs}, Le, Vdb, Bef, St) -> +cg(#k_match{anno=Le,body=M,ret=Rs}, Vdb, Bef, St) -> match_cg(M, Rs, Le, Vdb, Bef, St); -cg({guard_match,M,Rs}, Le, Vdb, Bef, St) -> +cg(#k_guard_match{anno=Le,body=M,ret=Rs}, Vdb, Bef, St) -> guard_match_cg(M, Rs, Le, Vdb, Bef, St); -cg({call,Func,As,Rs}, Le, Vdb, Bef, St) -> +cg(#k_call{anno=Le,op=Func,args=As,ret=Rs}, Vdb, Bef, St) -> call_cg(Func, As, Rs, Le, Vdb, Bef, St); -cg({enter,Func,As}, Le, Vdb, Bef, St) -> +cg(#k_enter{anno=Le,op=Func,args=As}, Vdb, Bef, St) -> enter_cg(Func, As, Le, Vdb, Bef, St); -cg({bif,Bif,As,Rs}, Le, Vdb, Bef, St) -> - bif_cg(Bif, As, Rs, Le, Vdb, Bef, St); -cg({gc_bif,Bif,As,Rs}, Le, Vdb, Bef, St) -> - gc_bif_cg(Bif, As, Rs, Le, Vdb, Bef, St); -cg({internal,Bif,As,Rs}, Le, Vdb, Bef, St) -> - internal_cg(Bif, As, Rs, Le, Vdb, Bef, St); -cg({receive_loop,Te,Rvar,Rm,Tes,Rs}, Le, Vdb, Bef, St) -> +cg(#k_bif{anno=Le}=Bif, Vdb, Bef, St) -> + bif_cg(Bif, Le, Vdb, Bef, St); +cg(#k_receive{anno=Le,timeout=Te,var=Rvar,body=Rm,action=Tes,ret=Rs}, + Vdb, Bef, St) -> recv_loop_cg(Te, Rvar, Rm, Tes, Rs, Le, Vdb, Bef, St); -cg(receive_next, Le, Vdb, Bef, St) -> +cg(#k_receive_next{anno=Le}, Vdb, Bef, St) -> recv_next_cg(Le, Vdb, Bef, St); -cg(receive_accept, _Le, _Vdb, Bef, St) -> {[remove_message],Bef,St}; -cg({'try',Ta,Vs,Tb,Evs,Th,Rs}, Le, Vdb, Bef, St) -> +cg(#k_receive_accept{}, _Vdb, Bef, St) -> + {[remove_message],Bef,St}; +cg(#k_try{anno=Le,arg=Ta,vars=Vs,body=Tb,evars=Evs,handler=Th,ret=Rs}, + Vdb, Bef, St) -> try_cg(Ta, Vs, Tb, Evs, Th, Rs, Le, Vdb, Bef, St); -cg({try_enter,Ta,Vs,Tb,Evs,Th}, Le, Vdb, Bef, St) -> +cg(#k_try_enter{anno=Le,arg=Ta,vars=Vs,body=Tb,evars=Evs,handler=Th}, + Vdb, Bef, St) -> try_enter_cg(Ta, Vs, Tb, Evs, Th, Le, Vdb, Bef, St); -cg({'catch',Cb,R}, Le, Vdb, Bef, St) -> +cg(#k_catch{anno=Le,body=Cb,ret=[R]}, Vdb, Bef, St) -> catch_cg(Cb, R, Le, Vdb, Bef, St); -cg({set,Var,Con}, Le, Vdb, Bef, St) -> - set_cg(Var, Con, Le, Vdb, Bef, St); -cg({return,Rs}, Le, Vdb, Bef, St) -> return_cg(Rs, Le, Vdb, Bef, St); -cg({break,Bs}, Le, Vdb, Bef, St) -> break_cg(Bs, Le, Vdb, Bef, St); -cg({guard_break,Bs,N}, Le, Vdb, Bef, St) -> +cg(#k_put{anno=Le,arg=Con,ret=Var}, Vdb, Bef, St) -> + put_cg(Var, Con, Le, Vdb, Bef, St); +cg(#k_return{anno=Le,args=Rs}, Vdb, Bef, St) -> + return_cg(Rs, Le, Vdb, Bef, St); +cg(#k_break{anno=Le,args=Bs}, Vdb, Bef, St) -> + break_cg(Bs, Le, Vdb, Bef, St); +cg(#k_guard_break{anno=Le,args=Bs,locked=N}, Vdb, Bef, St) -> guard_break_cg(Bs, N, Le, Vdb, Bef, St); -cg({need_heap,H}, _Le, _Vdb, Bef, St) -> +cg(#cg_need_heap{h=H}, _Vdb, Bef, St) -> {[{test_heap,H,max_reg(Bef#sr.reg)}],Bef,St}. %% cg_list([Kexpr], FirstI, Vdb, StackReg, St) -> {[Ainstr],StackReg,St}. @@ -191,11 +407,11 @@ cg_list(Kes, I, Vdb, Bef, St0) -> %% Insert need_heap instructions in Kexpr list. Try to be smart and %% collect them together as much as possible. -need_heap(Kes0, I) -> +need_heap(Kes0, _I) -> {Kes,H} = need_heap_0(reverse(Kes0), 0, []), %% Prepend need_heap if necessary. - need_heap_need(I, H) ++ Kes. + need_heap_need(H) ++ Kes. need_heap_0([Ke|Kes], H0, Acc) -> {Ns,H} = need_heap_1(Ke, H0), @@ -203,27 +419,54 @@ need_heap_0([Ke|Kes], H0, Acc) -> need_heap_0([], H, Acc) -> {Acc,H}. -need_heap_1(#l{ke={set,_,{binary,_}},i=I}, H) -> - {need_heap_need(I, H),0}; -need_heap_1(#l{ke={set,_,{map,_,_,_}},i=I}, H) -> - {need_heap_need(I, H),0}; -need_heap_1(#l{ke={set,_,Val}}, H) -> +need_heap_1(#k_put{arg=#k_binary{}}, H) -> + {need_heap_need(H),0}; +need_heap_1(#k_put{arg=#k_map{}}, H) -> + {need_heap_need(H),0}; +need_heap_1(#k_put{arg=Val}, H) -> %% Just pass through adding to needed heap. {[],H + case Val of - {cons,_} -> 2; - {tuple,Es} -> 1 + length(Es); + #k_cons{} -> 2; + #k_tuple{es=Es} -> 1 + length(Es); _Other -> 0 end}; -need_heap_1(#l{ke={bif,_Bif,_As,_Rs}}, H) -> - {[],H}; -need_heap_1(#l{i=I}, H) -> +need_heap_1(#k_bif{}=Bif, H) -> + case is_gc_bif(Bif) of + false -> + {[],H}; + true -> + {need_heap_need(H),0} + end; +need_heap_1(_Ke, H) -> %% Call or call-like instruction such as set_tuple_element/3. - {need_heap_need(I, H),0}. - -need_heap_need(_I, 0) -> []; -need_heap_need(I, H) -> [#l{ke={need_heap,H},i=I}]. - -%% match_cg(Match, [Ret], Le, Vdb, StackReg, State) -> + {need_heap_need(H),0}. + +need_heap_need(0) -> []; +need_heap_need(H) -> [#cg_need_heap{h=H}]. + +%% is_gc_bif(#k_bif{}) -> true|false. +%% is_gc_bif(Name, Arity) -> true|false. +%% Determines whether the BIF Name/Arity might do a GC. + +is_gc_bif(#k_bif{op=#k_remote{name=#k_atom{val=Name}},args=Args}) -> + is_gc_bif(Name, length(Args)); +is_gc_bif(#k_bif{op=#k_internal{}}) -> + true. + +is_gc_bif(hd, 1) -> false; +is_gc_bif(tl, 1) -> false; +is_gc_bif(self, 0) -> false; +is_gc_bif(node, 0) -> false; +is_gc_bif(node, 1) -> false; +is_gc_bif(element, 2) -> false; +is_gc_bif(get, 1) -> false; +is_gc_bif(tuple_size, 1) -> false; +is_gc_bif(Bif, Arity) -> + not (erl_internal:bool_op(Bif, Arity) orelse + erl_internal:new_type_test(Bif, Arity) orelse + erl_internal:comp_op(Bif, Arity)). + +%% match_cg(Matc, [Ret], Le, Vdb, StackReg, State) -> %% {[Ainstr],StackReg,State}. %% Generate code for a match. First save all variables on the stack %% that are to survive after the match. We leave saved variables in @@ -252,7 +495,7 @@ guard_match_cg(M, Rs, Le, Vdb, Bef, St0) -> clear_dead(Aft#sr{reg=Reg}, I, Vdb), St2#cg{break=St1#cg.break}}. -guard_match_regs([{I,gbreakvar}|Rs], [{var,V}|Vs]) -> +guard_match_regs([{I,gbreakvar}|Rs], [#k_var{name=V}|Vs]) -> [{I,V}|guard_match_regs(Rs, Vs)]; guard_match_regs([R|Rs], Vs) -> [R|guard_match_regs(Rs, Vs)]; @@ -264,17 +507,14 @@ guard_match_regs([], []) -> []. %% down as each level which uses this takes its own internal Vdb not %% the outer one. -match_cg(Le, Fail, Bef, St) -> - match_cg(Le#l.ke, Le, Fail, Bef, St). - -match_cg({alt,F,S}, _Le, Fail, Bef, St0) -> +match_cg(#k_alt{first=F,then=S}, Fail, Bef, St0) -> {Tf,St1} = new_label(St0), {Fis,Faft,St2} = match_cg(F, Tf, Bef, St1), {Sis,Saft,St3} = match_cg(S, Fail, Bef, St2), Aft = sr_merge(Faft, Saft), {Fis ++ [{label,Tf}] ++ Sis,Aft,St3}; -match_cg({select,{var,Vname}=V,Scs0}, #l{a=Anno}, Fail, Bef, St) -> - ReuseForContext = member(reuse_for_context, Anno) andalso +match_cg(#k_select{var=#k_var{anno=Vanno,name=Vname}=V,types=Scs0}, Fail, Bef, St) -> + ReuseForContext = member(reuse_for_context, Vanno) andalso find_reg(Vname, Bef#sr.reg) =/= error, Scs = case ReuseForContext of false -> Scs0; @@ -283,10 +523,10 @@ match_cg({select,{var,Vname}=V,Scs0}, #l{a=Anno}, Fail, Bef, St) -> match_fmf(fun (S, F, Sta) -> select_cg(S, V, F, Fail, Bef, Sta) end, Fail, St, Scs); -match_cg({guard,Gcs}, _Le, Fail, Bef, St) -> +match_cg(#k_guard{clauses=Gcs}, Fail, Bef, St) -> match_fmf(fun (G, F, Sta) -> guard_clause_cg(G, F, Bef, Sta) end, Fail, St, Gcs); -match_cg({block,Es}, Le, _Fail, Bef, St) -> +match_cg(#cg_block{anno=Le,es=Es}, _Fail, Bef, St) -> %% Must clear registers and stack of dead variables. Int = clear_dead(Bef, Le#l.i, Le#l.vdb), block_cg(Es, Le, Int, St). @@ -294,8 +534,8 @@ match_cg({block,Es}, Le, _Fail, Bef, St) -> %% bsm_rename_ctx([Clause], Var) -> [Clause] %% We know from an annotation that the register for a binary can %% be reused for the match context because the two are not truly -%% alive at the same time (even though the conservative life time -%% information calculated by v3_life says so). +%% alive at the same time (even though the life time information +%% says so). %% %% The easiest way to have those variables share the same register is %% to rename the variable with the shortest life-span (the match @@ -306,12 +546,14 @@ match_cg({block,Es}, Le, _Fail, Bef, St) -> %% We must also remove all information about the match context %% variable from all life-time information databases (Vdb). -bsm_rename_ctx([#l{ke={type_clause,binary, - [#l{ke={val_clause,{binary,{var,Old}},Ke0}}=L2]}}=L1|Cs], New) -> +bsm_rename_ctx([#k_type_clause{type=k_binary,values=Vcs}=TC|Cs], New) -> + [#k_val_clause{val=#k_binary{segs=#k_var{name=Old}}=Bin, + body=Ke0}=VC0] = Vcs, Ke = bsm_rename_ctx(Ke0, Old, New, false), - [L1#l{ke={type_clause,binary, - [L2#l{ke={val_clause,{binary,{var,New}},Ke}}]}}|bsm_rename_ctx(Cs, New)]; -bsm_rename_ctx([C|Cs], New) -> + VC = VC0#k_val_clause{val=Bin#k_binary{segs=#k_var{name=New}}, + body=Ke}, + [TC#k_type_clause{values=[VC]}|bsm_rename_ctx(Cs, New)]; +bsm_rename_ctx([C|Cs], New) -> [C|bsm_rename_ctx(Cs, New)]; bsm_rename_ctx([], _) -> []. @@ -321,34 +563,24 @@ bsm_rename_ctx([], _) -> []. %% only complicatate things to recurse into blocks not in a protected %% (the match context variable is not live inside them). -bsm_rename_ctx(#l{ke={select,{var,V},Cs0}}=L, Old, New, InProt) -> +bsm_rename_ctx(#k_select{var=#k_var{name=V},types=Cs0}=Sel, + Old, New, InProt) -> Cs = bsm_rename_ctx_list(Cs0, Old, New, InProt), - L#l{ke={select,{var,bsm_rename_var(V, Old, New)},Cs}}; -bsm_rename_ctx(#l{ke={type_clause,Type,Cs0}}=L, Old, New, InProt) -> + Sel#k_select{var=#k_var{name=bsm_rename_var(V, Old, New)},types=Cs}; +bsm_rename_ctx(#k_type_clause{values=Cs0}=TC, Old, New, InProt) -> Cs = bsm_rename_ctx_list(Cs0, Old, New, InProt), - L#l{ke={type_clause,Type,Cs}}; -bsm_rename_ctx(#l{ke={val_clause,{bin_end,V},Ke0}}=L, Old, New, InProt) -> - Ke = bsm_rename_ctx(Ke0, Old, New, InProt), - L#l{ke={val_clause,{bin_end,bsm_rename_var(V, Old, New)},Ke}}; -bsm_rename_ctx(#l{ke={val_clause,{bin_seg,V,Sz,U,Type,Fl,Vs},Ke0}}=L, - Old, New, InProt) -> - Ke = bsm_rename_ctx(Ke0, Old, New, InProt), - L#l{ke={val_clause,{bin_seg,bsm_rename_var(V, Old, New),Sz,U,Type,Fl,Vs},Ke}}; -bsm_rename_ctx(#l{ke={val_clause,{bin_int,V,Sz,U,Fl,Val,Vs},Ke0}}=L, - Old, New, InProt) -> - Ke = bsm_rename_ctx(Ke0, Old, New, InProt), - L#l{ke={val_clause,{bin_int,bsm_rename_var(V, Old, New),Sz,U,Fl,Val,Vs},Ke}}; -bsm_rename_ctx(#l{ke={val_clause,Val,Ke0}}=L, Old, New, InProt) -> + TC#k_type_clause{values=Cs}; +bsm_rename_ctx(#k_val_clause{body=Ke0}=VC, Old, New, InProt) -> Ke = bsm_rename_ctx(Ke0, Old, New, InProt), - L#l{ke={val_clause,Val,Ke}}; -bsm_rename_ctx(#l{ke={alt,F0,S0}}=L, Old, New, InProt) -> + VC#k_val_clause{body=Ke}; +bsm_rename_ctx(#k_alt{first=F0,then=S0}=Alt, Old, New, InProt) -> F = bsm_rename_ctx(F0, Old, New, InProt), S = bsm_rename_ctx(S0, Old, New, InProt), - L#l{ke={alt,F,S}}; -bsm_rename_ctx(#l{ke={guard,Gcs0}}=L, Old, New, InProt) -> + Alt#k_alt{first=F,then=S}; +bsm_rename_ctx(#k_guard{clauses=Gcs0}=Guard, Old, New, InProt) -> Gcs = bsm_rename_ctx_list(Gcs0, Old, New, InProt), - L#l{ke={guard,Gcs}}; -bsm_rename_ctx(#l{ke={guard_clause,G0,B0}}=L, Old, New, InProt) -> + Guard#k_guard{clauses=Gcs}; +bsm_rename_ctx(#k_guard_clause{guard=G0,body=B0}=GC, Old, New, InProt) -> G = bsm_rename_ctx(G0, Old, New, InProt), B = bsm_rename_ctx(B0, Old, New, InProt), %% A guard clause may cause unsaved variables to be saved on the stack. @@ -356,49 +588,49 @@ bsm_rename_ctx(#l{ke={guard_clause,G0,B0}}=L, Old, New, InProt) -> %% same register), it is neither in the stack nor register descriptor %% lists and we would crash when we didn't find it unless we remove %% it from the database. - bsm_forget_var(L#l{ke={guard_clause,G,B}}, Old); -bsm_rename_ctx(#l{ke={protected,Ts0,Rs}}=L, Old, New, _InProt) -> + bsm_forget_var(GC#k_guard_clause{guard=G,body=B}, Old); +bsm_rename_ctx(#k_protected{arg=Ts0}=Prot, Old, New, _InProt) -> InProt = true, Ts = bsm_rename_ctx_list(Ts0, Old, New, InProt), - bsm_forget_var(L#l{ke={protected,Ts,Rs}}, Old); -bsm_rename_ctx(#l{ke={match,Ms0,Rs}}=L, Old, New, InProt) -> + bsm_forget_var(Prot#k_protected{arg=Ts}, Old); +bsm_rename_ctx(#k_match{body=Ms0}=Match, Old, New, InProt) -> Ms = bsm_rename_ctx(Ms0, Old, New, InProt), - L#l{ke={match,Ms,Rs}}; -bsm_rename_ctx(#l{ke={guard_match,Ms0,Rs}}=L, Old, New, InProt) -> + Match#k_match{body=Ms}; +bsm_rename_ctx(#k_guard_match{body=Ms0}=Match, Old, New, InProt) -> Ms = bsm_rename_ctx(Ms0, Old, New, InProt), - L#l{ke={guard_match,Ms,Rs}}; -bsm_rename_ctx(#l{ke={test,_,_,_}}=L, _, _, _) -> L; -bsm_rename_ctx(#l{ke={bif,_,_,_}}=L, _, _, _) -> L; -bsm_rename_ctx(#l{ke={gc_bif,_,_,_}}=L, _, _, _) -> L; -bsm_rename_ctx(#l{ke={set,_,_}}=L, _, _, _) -> L; -bsm_rename_ctx(#l{ke={call,_,_,_}}=L, _, _, _) -> L; -bsm_rename_ctx(#l{ke={block,_}}=L, Old, _, false) -> + Match#k_guard_match{body=Ms}; +bsm_rename_ctx(#k_test{}=Test, _, _, _) -> Test; +bsm_rename_ctx(#k_bif{}=Bif, _, _, _) -> Bif; +bsm_rename_ctx(#k_put{}=Put, _, _, _) -> Put; +bsm_rename_ctx(#k_call{}=Call, _, _, _) -> Call; +bsm_rename_ctx(#cg_block{}=Block, Old, _, false) -> %% This block is not inside a protected. The match context variable cannot %% possibly be live inside the block. - bsm_forget_var(L, Old); -bsm_rename_ctx(#l{ke={block,Bl0}}=L, Old, New, true) -> + bsm_forget_var(Block, Old); +bsm_rename_ctx(#cg_block{es=Es0}=Block, Old, New, true) -> %% A block in a protected. We must recursively rename the variable %% inside the block. - Bl = bsm_rename_ctx_list(Bl0, Old, New, true), - bsm_forget_var(L#l{ke={block,Bl}}, Old); -bsm_rename_ctx(#l{ke={guard_break,Bs,Locked0}}=L0, Old, _New, _InProt) -> + Es = bsm_rename_ctx_list(Es0, Old, New, true), + bsm_forget_var(Block#cg_block{es=Es}, Old); +bsm_rename_ctx(#k_guard_break{locked=Locked0}=Break, Old, _New, _InProt) -> Locked = Locked0 -- [Old], - L = L0#l{ke={guard_break,Bs,Locked}}, - bsm_forget_var(L, Old). + bsm_forget_var(Break#k_guard_break{locked=Locked}, Old). bsm_rename_ctx_list([C|Cs], Old, New, InProt) -> [bsm_rename_ctx(C, Old, New, InProt)| bsm_rename_ctx_list(Cs, Old, New, InProt)]; bsm_rename_ctx_list([], _, _, _) -> []. - + bsm_rename_var(Old, Old, New) -> New; bsm_rename_var(V, _, _) -> V. %% bsm_forget_var(#l{}, Variable) -> #l{} %% Remove a variable from the variable life-time database. -bsm_forget_var(#l{vdb=Vdb}=L, V) -> - L#l{vdb=keydelete(V, 1, Vdb)}. +bsm_forget_var(Ke, V) -> + #l{vdb=Vdb} = L0 = get_kanno(Ke), + L = L0#l{vdb=keydelete(V, 1, Vdb)}, + set_kanno(Ke, L). %% block_cg([Kexpr], Le, Vdb, StackReg, St) -> {[Ainstr],StackReg,St}. %% block_cg([Kexpr], Le, StackReg, St) -> {[Ainstr],StackReg,St}. @@ -421,7 +653,7 @@ cg_block(Kes0, I, Vdb, Bef, St0) -> case basic_block(Kes0) of {Kes1,LastI,Args,Rest} -> Ke = hd(Kes1), - Fb = Ke#l.i, + #l{i=Fb} = get_kanno(Ke), cg_basic_block(Kes1, Fb, LastI, Args, Vdb, Bef, St0); {Kes1,Rest} -> cg_list(Kes1, I, Vdb, Bef, St0) @@ -431,36 +663,46 @@ cg_block(Kes0, I, Vdb, Bef, St0) -> basic_block(Kes) -> basic_block(Kes, []). -basic_block([Le|Les], Acc) -> - case collect_block(Le#l.ke) of - include -> basic_block(Les, [Le|Acc]); +basic_block([Ke|Kes], Acc) -> + case collect_block(Ke) of + include -> basic_block(Kes, [Ke|Acc]); {block_end,As} -> case Acc of [] -> - %% If the basic block does not contain any set instructions, + %% If the basic block does not contain any #k_put{} instructions, %% it serves no useful purpose to do basic block optimizations. - {[Le],Les}; + {[Ke],Kes}; _ -> - {reverse(Acc, [Le]),Le#l.i,As,Les} + #l{i=I} = get_kanno(Ke), + {reverse(Acc, [Ke]),I,As,Kes} end; - no_block -> {reverse(Acc, [Le]),Les} + no_block -> {reverse(Acc, [Ke]),Kes} end. -%% sets that may garbage collect are not allowed in basic blocks. - -collect_block({set,_,{binary,_}}) -> no_block; -collect_block({set,_,{map,_,_,_}}) -> no_block; -collect_block({set,_,_}) -> include; -collect_block({call,{var,_}=Var,As,_Rs}) -> {block_end,As++[Var]}; -collect_block({call,Func,As,_Rs}) -> {block_end,As++func_vars(Func)}; -collect_block({enter,{var,_}=Var,As})-> {block_end,As++[Var]}; -collect_block({enter,Func,As}) -> {block_end,As++func_vars(Func)}; -collect_block({return,Rs}) -> {block_end,Rs}; -collect_block({break,Bs}) -> {block_end,Bs}; +%% #k_put{} instructions that may garbage collect are not allowed in basic blocks. + +collect_block(#k_put{arg=#k_binary{}}) -> + no_block; +collect_block(#k_put{arg=#k_map{}}) -> + no_block; +collect_block(#k_put{}) -> + include; +collect_block(#k_call{op=#k_var{}=Var,args=As}) -> + {block_end,As++[Var]}; +collect_block(#k_call{op=Func,args=As}) -> + {block_end,As++func_vars(Func)}; +collect_block(#k_enter{op=#k_var{}=Var,args=As}) -> + {block_end,As++[Var]}; +collect_block(#k_enter{op=Func,args=As}) -> + {block_end,As++func_vars(Func)}; +collect_block(#k_return{args=Rs}) -> + {block_end,Rs}; +collect_block(#k_break{args=Bs}) -> + {block_end,Bs}; collect_block(_) -> no_block. -func_vars({remote,M,F}) when element(1, M) =:= var; - element(1, F) =:= var -> +func_vars(#k_remote{mod=M,name=F}) + when is_record(M, k_var); is_record(F, k_var) -> [M,F]; func_vars(_) -> []. @@ -478,18 +720,19 @@ cg_basic_block(Kes, Fb, Lf, As, Vdb, Bef, St0) -> {Int0,X0_v0,St0}, need_heap(Kes, Fb)), {Keis,Aft,St1}. -cg_basic_block(#l{ke={need_heap,_}}=Ke, {Inta,X0v,Sta}, _Lf, Vdb) -> +cg_basic_block(#cg_need_heap{}=Ke, {Inta,X0v,Sta}, _Lf, Vdb) -> {Keis,Intb,Stb} = cg(Ke, Vdb, Inta, Sta), {Keis, {Intb,X0v,Stb}}; cg_basic_block(Ke, {Inta,X0_v1,Sta}, Lf, Vdb) -> - {Sis,Intb} = save_carefully(Inta, Ke#l.i, Lf+1, Vdb), - {X0_v2,Intc} = allocate_x0(X0_v1, Ke#l.i, Intb), + #l{i=I} = get_kanno(Ke), + {Sis,Intb} = save_carefully(Inta, I, Lf+1, Vdb), + {X0_v2,Intc} = allocate_x0(X0_v1, I, Intb), Intd = reserve(Intc), {Keis,Inte,Stb} = cg(Ke, Vdb, Intd, Sta), {Sis ++ Keis, {Inte,X0_v2,Stb}}. make_reservation([], _) -> []; -make_reservation([{var,V}|As], I) -> [{I,V}|make_reservation(As, I+1)]; +make_reservation([#k_var{name=V}|As], I) -> [{I,V}|make_reservation(As, I+1)]; make_reservation([A|As], I) -> [{I,A}|make_reservation(As, I+1)]. reserve(Sr) -> Sr#sr{reg=reserve(Sr#sr.res, Sr#sr.reg, Sr#sr.stk)}. @@ -538,7 +781,7 @@ save_carefully([V|Vs], Bef, Acc) -> end. x0_vars([], _Fb, _Lf, _Vdb) -> []; -x0_vars([{var,V}|_], Fb, _Lf, Vdb) -> +x0_vars([#k_var{name=V}|_], Fb, _Lf, Vdb) -> {V,F,_L} = VFL = vdb_find(V, Vdb), x0_vars1([VFL], Fb, F, Vdb); x0_vars([X0|_], Fb, Lf, Vdb) -> @@ -640,23 +883,27 @@ turn_yreg(Other, _MaxY) -> %% wrong. These are different as in the second case there is no need %% to try the next type, it will always fail. -select_cg(#l{ke={type_clause,cons,[S]}}, {var,V}, Tf, Vf, Bef, St) -> +select_cg(#k_type_clause{type=Type,values=Vs}, Var, Tf, Vf, Bef, St) -> + #k_var{name=V} = Var, + select_cg(Type, Vs, V, Tf, Vf, Bef, St). + +select_cg(k_cons, [S], V, Tf, Vf, Bef, St) -> select_cons(S, V, Tf, Vf, Bef, St); -select_cg(#l{ke={type_clause,nil,[S]}}, {var,V}, Tf, Vf, Bef, St) -> +select_cg(k_nil, [S], V, Tf, Vf, Bef, St) -> select_nil(S, V, Tf, Vf, Bef, St); -select_cg(#l{ke={type_clause,binary,[S]}}, {var,V}, Tf, Vf, Bef, St) -> +select_cg(k_binary, [S], V, Tf, Vf, Bef, St) -> select_binary(S, V, Tf, Vf, Bef, St); -select_cg(#l{ke={type_clause,bin_seg,S}}, {var,V}, Tf, _Vf, Bef, St) -> +select_cg(k_bin_seg, S, V, Tf, _Vf, Bef, St) -> select_bin_segs(S, V, Tf, Bef, St); -select_cg(#l{ke={type_clause,bin_int,S}}, {var,V}, Tf, _Vf, Bef, St) -> +select_cg(k_bin_int, S, V, Tf, _Vf, Bef, St) -> select_bin_segs(S, V, Tf, Bef, St); -select_cg(#l{ke={type_clause,bin_end,[S]}}, {var,V}, Tf, _Vf, Bef, St) -> +select_cg(k_bin_end, [S], V, Tf, _Vf, Bef, St) -> select_bin_end(S, V, Tf, Bef, St); -select_cg(#l{ke={type_clause,map,S}}, {var,V}, Tf, Vf, Bef, St) -> +select_cg(k_map, S, V, Tf, Vf, Bef, St) -> select_map(S, V, Tf, Vf, Bef, St); -select_cg(#l{ke={type_clause,literal,S}}, {var,V}, Tf, Vf, Bef, St) -> +select_cg(k_literal, S, V, Tf, Vf, Bef, St) -> select_literal(S, V, Tf, Vf, Bef, St); -select_cg(#l{ke={type_clause,Type,Scs}}, {var,V}, Tf, Vf, Bef, St0) -> +select_cg(Type, Scs, V, Tf, Vf, Bef, St0) -> {Vis,{Aft,St1}} = mapfoldl(fun (S, {Int,Sta}) -> {Val,Is,Inta,Stb} = select_val(S, V, Vf, Bef, Sta), @@ -666,22 +913,29 @@ select_cg(#l{ke={type_clause,Type,Scs}}, {var,V}, Tf, Vf, Bef, St0) -> {Vls,Sis,St2} = select_labels(OptVls, St1, [], []), {select_val_cg(Type, fetch_var(V, Bef), Vls, Tf, Vf, Sis), Aft, St2}. -select_val_cg(tuple, R, [Arity,{f,Lbl}], Tf, Vf, [{label,Lbl}|Sis]) -> +select_val_cg(k_tuple, R, [Arity,{f,Lbl}], Tf, Vf, [{label,Lbl}|Sis]) -> [{test,is_tuple,{f,Tf},[R]},{test,test_arity,{f,Vf},[R,Arity]}|Sis]; -select_val_cg(tuple, R, Vls, Tf, Vf, Sis) -> +select_val_cg(k_tuple, R, Vls, Tf, Vf, Sis) -> [{test,is_tuple,{f,Tf},[R]},{select_tuple_arity,R,{f,Vf},{list,Vls}}|Sis]; select_val_cg(Type, R, [Val, {f,Lbl}], Fail, Fail, [{label,Lbl}|Sis]) -> - [{test,is_eq_exact,{f,Fail},[R,{Type,Val}]}|Sis]; + [{test,is_eq_exact,{f,Fail},[R,{type(Type),Val}]}|Sis]; select_val_cg(Type, R, [Val, {f,Lbl}], Tf, Vf, [{label,Lbl}|Sis]) -> [{test,select_type_test(Type),{f,Tf},[R]}, - {test,is_eq_exact,{f,Vf},[R,{Type,Val}]}|Sis]; + {test,is_eq_exact,{f,Vf},[R,{type(Type),Val}]}|Sis]; select_val_cg(Type, R, Vls0, Tf, Vf, Sis) -> - Vls1 = [case Value of {f,_Lbl} -> Value; _ -> {Type,Value} end || Value <- Vls0], + Vls1 = [case Value of + {f,_Lbl} -> Value; + _ -> {type(Type),Value} + end || Value <- Vls0], [{test,select_type_test(Type),{f,Tf},[R]}, {select_val,R,{f,Vf},{list,Vls1}}|Sis]. - -select_type_test(integer) -> is_integer; -select_type_test(atom) -> is_atom; -select_type_test(float) -> is_float. + +type(k_atom) -> atom; +type(k_float) -> float; +type(k_int) -> integer. + +select_type_test(k_int) -> is_integer; +select_type_test(k_atom) -> is_atom; +select_type_test(k_float) -> is_float. combine([{Is,Vs1}, {Is,Vs2}|Vis]) -> combine([{Is,Vs1 ++ Vs2}|Vis]); combine([V|Vis]) -> [V|combine(Vis)]; @@ -706,36 +960,40 @@ select_literal(S, V, Tf, Vf, Bef, St) -> end, match_fmf(F, Tf, St, S). -select_cons(#l{ke={val_clause,{cons,Es},B},i=I,vdb=Vdb}, V, Tf, Vf, Bef, St0) -> +select_cons(#k_val_clause{val=#k_cons{hd=Hd,tl=Tl},body=B,anno=#l{i=I,vdb=Vdb}}, + V, Tf, Vf, Bef, St0) -> + Es = [Hd,Tl], {Eis,Int,St1} = select_extract_cons(V, Es, I, Vdb, Bef, St0), {Bis,Aft,St2} = match_cg(B, Vf, Int, St1), {[{test,is_nonempty_list,{f,Tf},[fetch_var(V, Bef)]}] ++ Eis ++ Bis,Aft,St2}. -select_nil(#l{ke={val_clause,nil,B}}, V, Tf, Vf, Bef, St0) -> +select_nil(#k_val_clause{val=#k_nil{},body=B}, V, Tf, Vf, Bef, St0) -> {Bis,Aft,St1} = match_cg(B, Vf, Bef, St0), {[{test,is_nil,{f,Tf},[fetch_var(V, Bef)]}] ++ Bis,Aft,St1}. -select_binary(#l{ke={val_clause,{binary,{var,V}},B},i=I,vdb=Vdb}, - V, Tf, Vf, Bef, St0) -> +select_binary(#k_val_clause{val=#k_binary{segs=#k_var{name=V}},body=B, + anno=#l{i=I,vdb=Vdb}}, V, Tf, Vf, Bef, St0) -> + #cg{ctx=OldCtx} = St0, Int0 = clear_dead(Bef#sr{reg=Bef#sr.reg}, I, Vdb), - {Bis0,Aft,St1} = match_cg(B, Vf, Int0, St0), + {Bis0,Aft,St1} = match_cg(B, Vf, Int0, St0#cg{ctx=V}), CtxReg = fetch_var(V, Int0), Live = max_reg(Bef#sr.reg), Bis1 = [{test,bs_start_match2,{f,Tf},Live,[CtxReg,V],CtxReg}, {bs_save2,CtxReg,{V,V}}|Bis0], Bis = finish_select_binary(Bis1), - {Bis,Aft,St1}; -select_binary(#l{ke={val_clause,{binary,{var,Ivar}},B},i=I,vdb=Vdb}, - V, Tf, Vf, Bef, St0) -> + {Bis,Aft,St1#cg{ctx=OldCtx}}; +select_binary(#k_val_clause{val=#k_binary{segs=#k_var{name=Ivar}},body=B, + anno=#l{i=I,vdb=Vdb}}, V, Tf, Vf, Bef, St0) -> + #cg{ctx=OldCtx} = St0, Regs = put_reg(Ivar, Bef#sr.reg), Int0 = clear_dead(Bef#sr{reg=Regs}, I, Vdb), - {Bis0,Aft,St1} = match_cg(B, Vf, Int0, St0), + {Bis0,Aft,St1} = match_cg(B, Vf, Int0, St0#cg{ctx=Ivar}), CtxReg = fetch_var(Ivar, Int0), Live = max_reg(Bef#sr.reg), Bis1 = [{test,bs_start_match2,{f,Tf},Live,[fetch_var(V, Bef),Ivar],CtxReg}, {bs_save2,CtxReg,{Ivar,Ivar}}|Bis0], Bis = finish_select_binary(Bis1), - {Bis,Aft,St1}. + {Bis,Aft,St1#cg{ctx=OldCtx}}. finish_select_binary([{bs_save2,R,Point}=I,{bs_restore2,R,Point}|Is]) -> [I|finish_select_binary(Is)]; @@ -757,9 +1015,16 @@ select_bin_segs(Scs, Ivar, Tf, Bef, St) -> select_bin_seg(S, Ivar, Fail, Bef, Sta) end, Tf, St, Scs). -select_bin_seg(#l{ke={val_clause,{bin_seg,Ctx,Size,U,T,Fs0,Es},B},i=I,vdb=Vdb,a=A}, - Ivar, Fail, Bef, St0) -> +select_bin_seg(#k_val_clause{val=#k_bin_seg{size=Size,unit=U,type=T, + seg=Seg,flags=Fs0,next=Next}, + body=B, + anno=#l{i=I,vdb=Vdb,a=A}}, Ivar, Fail, Bef, St0) -> + Ctx = St0#cg.ctx, Fs = [{anno,A}|Fs0], + Es = case Next of + [] -> [Seg]; + _ -> [Seg,Next] + end, {Mis,Int,St1} = select_extract_bin(Es, Size, U, T, Fs, Fail, I, Vdb, Bef, Ctx, B, St0), {Bis,Aft,St2} = match_cg(B, Fail, Int, St1), @@ -772,9 +1037,12 @@ select_bin_seg(#l{ke={val_clause,{bin_seg,Ctx,Size,U,T,Fs0,Es},B},i=I,vdb=Vdb,a= [{bs_restore2,CtxReg,{Ctx,Ivar}}|Mis++Bis] end, {Is,Aft,St2}; -select_bin_seg(#l{ke={val_clause,{bin_int,Ctx,Sz,U,Fs,Val,Es},B},i=I,vdb=Vdb}, - Ivar, Fail, Bef, St0) -> - {Mis,Int,St1} = select_extract_int(Es, Val, Sz, U, Fs, Fail, +select_bin_seg(#k_val_clause{val=#k_bin_int{size=Sz,unit=U,flags=Fs, + val=Val,next=Next}, + body=B, + anno=#l{i=I,vdb=Vdb}}, Ivar, Fail, Bef, St0) -> + Ctx = St0#cg.ctx, + {Mis,Int,St1} = select_extract_int(Next, Val, Sz, U, Fs, Fail, I, Vdb, Bef, Ctx, St0), {Bis,Aft,St2} = match_cg(B, Fail, Int, St1), CtxReg = fetch_var(Ctx, Bef), @@ -795,7 +1063,7 @@ select_bin_seg(#l{ke={val_clause,{bin_int,Ctx,Sz,U,Fs,Val,Es},B},i=I,vdb=Vdb}, end, {[{bs_restore2,CtxReg,{Ctx,Ivar}}|Is],Aft,St2}. -select_extract_int([{var,Tl}], Val, {integer,Sz}, U, Fs, Vf, +select_extract_int(#k_var{name=Tl}, Val, #k_int{val=Sz}, U, Fs, Vf, I, Vdb, Bef, Ctx, St) -> Bits = U*Sz, Bin = case member(big, Fs) of @@ -816,7 +1084,7 @@ select_extract_int([{var,Tl}], Val, {integer,Sz}, U, Fs, Vf, end, {Is,clear_dead(Bef, I, Vdb),St}. -select_extract_bin([{var,Hd},{var,Tl}], Size0, Unit, Type, Flags, Vf, +select_extract_bin([#k_var{name=Hd},#k_var{name=Tl}], Size0, Unit, Type, Flags, Vf, I, Vdb, Bef, Ctx, _Body, St) -> SizeReg = get_bin_size_reg(Size0, Bef), {Es,Aft} = @@ -839,11 +1107,11 @@ select_extract_bin([{var,Hd},{var,Tl}], Size0, Unit, Type, Flags, Vf, {bs_save2,CtxReg,{Ctx,Tl}}],Int1} end, {Es,clear_dead(Aft, I, Vdb),St}; -select_extract_bin([{var,Hd}], Size, Unit, binary, Flags, Vf, +select_extract_bin([#k_var{name=Hd}], Size, Unit, binary, Flags, Vf, I, Vdb, Bef, Ctx, Body, St) -> %% Match the last segment of a binary. We KNOW that the size %% must be 'all'. - Size = {atom,all}, %Assertion. + #k_atom{val=all} = Size, %Assertion. {Es,Aft} = case vdb_find(Hd, Vdb) of {_,_,Lhd} when Lhd =< I -> @@ -868,7 +1136,7 @@ select_extract_bin([{var,Hd}], Size, Unit, binary, Flags, Vf, Name = bs_get_binary2, Live = max_reg(Bef#sr.reg), {[{test,Name,{f,Vf},Live, - [CtxReg,Size,Unit,{field_flags,Flags}],Rhd}], + [CtxReg,atomic(Size),Unit,{field_flags,Flags}],Rhd}], Int1}; true -> %% Since the matching context will not be used again, @@ -883,43 +1151,42 @@ select_extract_bin([{var,Hd}], Size, Unit, binary, Flags, Vf, Name = bs_get_binary2, Live = max_reg(Int1#sr.reg), {[{test,Name,{f,Vf},Live, - [CtxReg,Size,Unit,{field_flags,Flags}],CtxReg}], + [CtxReg,atomic(Size),Unit,{field_flags,Flags}],CtxReg}], Int1} end end, {Es,clear_dead(Aft, I, Vdb),St}. %% is_context_unused(Ke) -> true | false -%% Simple heurististic to determine whether the code that follows will -%% use the current matching context again. (The information of liveness -%% calculcated by v3_life is too conservative to be useful for this purpose.) -%% 'true' means that the code that follows will definitely not use the context -%% again (because it is a block, not guard or matching code); 'false' that we -%% are not sure (there could be more matching). - -is_context_unused(#l{ke=Ke}) -> - is_context_unused(Ke); -is_context_unused({alt,_First,Then}) -> - %% {alt,First,Then} can be used for different purposes. If the Then part +%% Simple heurististic to determine whether the code that follows +%% will use the current matching context again. (The liveness +%% information is too conservative to be useful for this purpose.) +%% 'true' means that the code that follows will definitely not use +%% the context again (because it is a block, not guard or matching +%% code); 'false' that we are not sure (there could be more +%% matching). + +is_context_unused(#k_alt{then=Then}) -> + %% #k_alt{} can be used for different purposes. If the Then part %% is a block, it means that matching has finished and is used for a guard %% to choose between the matched clauses. is_context_unused(Then); -is_context_unused({block,_}) -> +is_context_unused(#cg_block{}) -> true; is_context_unused(_) -> false. -select_bin_end(#l{ke={val_clause,{bin_end,Ctx},B}}, - Ivar, Tf, Bef, St0) -> +select_bin_end(#k_val_clause{val=#k_bin_end{},body=B}, Ivar, Tf, Bef, St0) -> + Ctx = St0#cg.ctx, {Bis,Aft,St2} = match_cg(B, Tf, Bef, St0), CtxReg = fetch_var(Ctx, Bef), {[{bs_restore2,CtxReg,{Ctx,Ivar}}, {test,bs_test_tail2,{f,Tf},[CtxReg,0]}|Bis],Aft,St2}. -get_bin_size_reg({var,V}, Bef) -> +get_bin_size_reg(#k_var{name=V}, Bef) -> fetch_var(V, Bef); get_bin_size_reg(Literal, _Bef) -> - Literal. + atomic(Literal). build_bs_instr(Type, Vf, CtxReg, Live, SizeReg, Unit, Flags, Rhd) -> {Format,Name} = case Type of @@ -953,11 +1220,18 @@ build_skip_instr(Type, Vf, CtxReg, Live, SizeReg, Unit, Flags) -> {test,Name,{f,Vf},[CtxReg,Live,{field_flags,Flags}]} end. -select_val(#l{ke={val_clause,{tuple,Es},B},i=I,vdb=Vdb}, V, Vf, Bef, St0) -> +select_val(#k_val_clause{val=#k_tuple{es=Es},body=B,anno=#l{i=I,vdb=Vdb}}, + V, Vf, Bef, St0) -> {Eis,Int,St1} = select_extract_tuple(V, Es, I, Vdb, Bef, St0), {Bis,Aft,St2} = match_cg(B, Vf, Int, St1), {length(Es),Eis ++ Bis,Aft,St2}; -select_val(#l{ke={val_clause,{_,Val},B}}, _V, Vf, Bef, St0) -> +select_val(#k_val_clause{val=Val0,body=B}, _V, Vf, Bef, St0) -> + Val = case Val0 of + #k_atom{val=Lit} -> Lit; + #k_float{val=Lit} -> Lit; + #k_int{val=Lit} -> Lit; + #k_literal{val=Lit} -> Lit + end, {Bis,Aft,St1} = match_cg(B, Vf, Bef, St0), {Val,Bis,Aft,St1}. @@ -966,7 +1240,7 @@ select_val(#l{ke={val_clause,{_,Val},B}}, _V, Vf, Bef, St0) -> %% Extract tuple elements, but only if they do not immediately die. select_extract_tuple(Src, Vs, I, Vdb, Bef, St) -> - F = fun ({var,V}, {Int0,Elem}) -> + F = fun (#k_var{name=V}, {Int0,Elem}) -> case vdb_find(V, Vdb) of {V,_,L} when L =< I -> {[], {Int0,Elem+1}}; _Other -> @@ -983,9 +1257,10 @@ select_extract_tuple(Src, Vs, I, Vdb, Bef, St) -> select_map(Scs, V, Tf, Vf, Bef, St0) -> Reg = fetch_var(V, Bef), {Is,Aft,St1} = - match_fmf(fun(#l{ke={val_clause,{map,exact,_,Es},B},i=I,vdb=Vdb}, Fail, St1) -> - select_map_val(V, Es, B, Fail, I, Vdb, Bef, St1) - end, Vf, St0, Scs), + match_fmf(fun(#k_val_clause{val=#k_map{op=exact,es=Es}, + body=B,anno=#l{i=I,vdb=Vdb}}, Fail, St1) -> + select_map_val(V, Es, B, Fail, I, Vdb, Bef, St1) + end, Vf, St0, Scs), {[{test,is_map,{f,Tf},[Reg]}|Is],Aft,St1}. select_map_val(V, Es, B, Fail, I, Vdb, Bef, St0) -> @@ -1002,29 +1277,32 @@ select_extract_map(Src, Vs, Fail, I, Vdb, Bef, St) -> %% Assume keys are term-sorted Rsrc = fetch_var(Src, Bef), - {{HasKs,GetVs,HasVarKs,GetVarVs},Aft} = lists:foldr(fun - ({map_pair,{var,K},{var,V}},{{HasKsi,GetVsi,HasVarVsi,GetVarVsi},Int0}) -> - case vdb_find(V, Vdb) of - {V,_,L} when L =< I -> - RK = fetch_var(K,Int0), - {{HasKsi,GetVsi,[RK|HasVarVsi],GetVarVsi},Int0}; - _Other -> - Reg1 = put_reg(V, Int0#sr.reg), - Int1 = Int0#sr{reg=Reg1}, - RK = fetch_var(K,Int0), - RV = fetch_reg(V,Reg1), - {{HasKsi,GetVsi,HasVarVsi,[[RK,RV]|GetVarVsi]},Int1} - end; - ({map_pair,Key,{var,V}},{{HasKsi,GetVsi,HasVarVsi,GetVarVsi},Int0}) -> - case vdb_find(V, Vdb) of - {V,_,L} when L =< I -> - {{[Key|HasKsi],GetVsi,HasVarVsi,GetVarVsi},Int0}; - _Other -> - Reg1 = put_reg(V, Int0#sr.reg), - Int1 = Int0#sr{reg=Reg1}, - {{HasKsi,[Key,fetch_reg(V, Reg1)|GetVsi],HasVarVsi,GetVarVsi},Int1} - end - end, {{[],[],[],[]},Bef}, Vs), + {{HasKs,GetVs,HasVarKs,GetVarVs},Aft} = + foldr(fun(#k_map_pair{key=#k_var{name=K},val=#k_var{name=V}}, + {{HasKsi,GetVsi,HasVarVsi,GetVarVsi},Int0}) -> + case vdb_find(V, Vdb) of + {V,_,L} when L =< I -> + RK = fetch_var(K,Int0), + {{HasKsi,GetVsi,[RK|HasVarVsi],GetVarVsi},Int0}; + _Other -> + Reg1 = put_reg(V, Int0#sr.reg), + Int1 = Int0#sr{reg=Reg1}, + RK = fetch_var(K,Int0), + RV = fetch_reg(V,Reg1), + {{HasKsi,GetVsi,HasVarVsi,[[RK,RV]|GetVarVsi]},Int1} + end; + (#k_map_pair{key=Key,val=#k_var{name=V}}, + {{HasKsi,GetVsi,HasVarVsi,GetVarVsi},Int0}) -> + case vdb_find(V, Vdb) of + {V,_,L} when L =< I -> + {{[atomic(Key)|HasKsi],GetVsi,HasVarVsi,GetVarVsi},Int0}; + _Other -> + Reg1 = put_reg(V, Int0#sr.reg), + Int1 = Int0#sr{reg=Reg1}, + {{HasKsi,[atomic(Key),fetch_reg(V, Reg1)|GetVsi], + HasVarVsi,GetVarVsi},Int1} + end + end, {{[],[],[],[]},Bef}, Vs), Code = [{test,has_map_fields,{f,Fail},Rsrc,{list,HasKs}} || HasKs =/= []] ++ [{test,has_map_fields,{f,Fail},Rsrc,{list,[K]}} || K <- HasVarKs] ++ @@ -1033,7 +1311,7 @@ select_extract_map(Src, Vs, Fail, I, Vdb, Bef, St) -> {Code, Aft, St}. -select_extract_cons(Src, [{var,Hd}, {var,Tl}], I, Vdb, Bef, St) -> +select_extract_cons(Src, [#k_var{name=Hd}, #k_var{name=Tl}], I, Vdb, Bef, St) -> {Es,Aft} = case {vdb_find(Hd, Vdb), vdb_find(Tl, Vdb)} of {{_,_,Lhd}, {_,_,Ltl}} when Lhd =< I, Ltl =< I -> %% Both head and tail are dead. No need to generate @@ -1056,7 +1334,7 @@ select_extract_cons(Src, [{var,Hd}, {var,Tl}], I, Vdb, Bef, St) -> {Es,Aft,St}. -guard_clause_cg(#l{ke={guard_clause,G,B},vdb=Vdb}, Fail, Bef, St0) -> +guard_clause_cg(#k_guard_clause{anno=#l{vdb=Vdb},guard=G,body=B}, Fail, Bef, St0) -> {Gis,Int,St1} = guard_cg(G, Fail, Vdb, Bef, St0), {Bis,Aft,St} = match_cg(B, Fail, Int, St1), {Gis ++ Bis,Aft,St}. @@ -1069,11 +1347,13 @@ guard_clause_cg(#l{ke={guard_clause,G,B},vdb=Vdb}, Fail, Bef, St0) -> %% the correct exit point. Primops and tests all go to the next %% instruction on success or jump to a failure label. -guard_cg(#l{ke={protected,Ts,Rs},i=I,vdb=Pdb}, Fail, _Vdb, Bef, St) -> +guard_cg(#k_protected{arg=Ts,ret=Rs,anno=#l{i=I,vdb=Pdb}}, Fail, _Vdb, Bef, St) -> protected_cg(Ts, Rs, Fail, I, Pdb, Bef, St); -guard_cg(#l{ke={block,Ts},i=I,vdb=Bdb}, Fail, _Vdb, Bef, St) -> +guard_cg(#cg_block{es=Ts,anno=#l{i=I,vdb=Bdb}}, Fail, _Vdb, Bef, St) -> guard_cg_list(Ts, Fail, I, Bdb, Bef, St); -guard_cg(#l{ke={test,Test,As,Inverted},i=I,vdb=_Tdb}, Fail, Vdb, Bef, St0) -> +guard_cg(#k_test{anno=#l{i=I},op=Test0,args=As,inverted=Inverted}, + Fail, Vdb, Bef, St0) -> + #k_remote{mod=#k_atom{val=erlang},name=#k_atom{val=Test}} = Test0, case Inverted of false -> test_cg(Test, As, Fail, I, Vdb, Bef, St0); @@ -1107,7 +1387,7 @@ protected_cg(Ts, Rs, _Fail, I, Vdb, Bef, St0) -> St2#cg{bfail=Pfail}), %%ok = io:fwrite("cg ~w: ~p~n", [?LINE,{Rs,I,Vdb,Aft}]), %% Set return values to false. - Mis = [{move,{atom,false},fetch_var(V,Aft)}||{var,V} <- Rs], + Mis = [{move,{atom,false},fetch_var(V,Aft)}||#k_var{name=V} <- Rs], {Tis ++ [{jump,{f,Psucc}}, {label,Pfail}] ++ Mis ++ [{label,Psucc}], Aft,St3#cg{bfail=St0#cg.bfail}}. @@ -1132,7 +1412,7 @@ test_cg(is_map, [A], Fail, I, Vdb, Bef, St) -> Arg = cg_reg_arg_prefer_y(A, Bef), Aft = clear_dead(Bef, I, Vdb), {[{test,is_map,{f,Fail},[Arg]}],Aft,St}; -test_cg(is_boolean, [{atom,Val}], Fail, I, Vdb, Bef, St) -> +test_cg(is_boolean, [#k_atom{val=Val}], Fail, I, Vdb, Bef, St) -> Aft = clear_dead(Bef, I, Vdb), Is = case is_boolean(Val) of true -> []; @@ -1178,7 +1458,7 @@ match_fmf(F, LastFail, St0, [H|T]) -> %% frame size. Finally the actual call is made. Call then needs the %% return values filled in. -call_cg({var,_V} = Var, As, Rs, Le, Vdb, Bef, St0) -> +call_cg(#k_var{}=Var, As, Rs, Le, Vdb, Bef, St0) -> {Sis,Int} = cg_setup_call(As++[Var], Bef, Le#l.i, Vdb), %% Put return values in registers. Reg = load_vars(Rs, clear_regs(Int#sr.reg)), @@ -1187,9 +1467,8 @@ call_cg({var,_V} = Var, As, Rs, Le, Vdb, Bef, St0) -> {Frees,Aft} = free_dead(clear_dead(Int#sr{reg=Reg}, Le#l.i, Vdb)), {Sis ++ Frees ++ [line(Le),{call_fun,Arity}],Aft, need_stack_frame(St0)}; -call_cg({remote,Mod,Name}, As, Rs, Le, Vdb, Bef, St0) - when element(1, Mod) =:= var; - element(1, Name) =:= var -> +call_cg(#k_remote{mod=Mod,name=Name}, As, Rs, Le, Vdb, Bef, St0) + when is_record(Mod, k_var); is_record(Name, k_var) -> {Sis,Int} = cg_setup_call(As++[Mod,Name], Bef, Le#l.i, Vdb), %% Put return values in registers. Reg = load_vars(Rs, clear_regs(Int#sr.reg)), @@ -1207,8 +1486,9 @@ call_cg(Func, As, Rs, Le, Vdb, Bef, St0) -> %% %% move {atom,ok} DestReg %% jump FailureLabel - {remote,{atom,erlang},{atom,error}} = Func, %Assertion. - [{var,DestVar}] = Rs, + #k_remote{mod=#k_atom{val=erlang}, + name=#k_atom{val=error}} = Func, %Assertion. + [#k_var{name=DestVar}] = Rs, Int0 = clear_dead(Bef, Le#l.i, Vdb), Reg = put_reg(DestVar, Int0#sr.reg), Int = Int0#sr{reg=Reg}, @@ -1227,11 +1507,11 @@ call_cg(Func, As, Rs, Le, Vdb, Bef, St0) -> {Sis ++ Frees ++ [line(Le)|Call],Aft,St1} end. -build_call({remote,{atom,erlang},{atom,'!'}}, 2, St0) -> +build_call(#k_remote{mod=#k_atom{val=erlang},name=#k_atom{val='!'}}, 2, St0) -> {[send],need_stack_frame(St0)}; -build_call({remote,{atom,Mod},{atom,Name}}, Arity, St0) -> +build_call(#k_remote{mod=#k_atom{val=Mod},name=#k_atom{val=Name}}, Arity, St0) -> {[{call_ext,Arity,{extfunc,Mod,Name,Arity}}],need_stack_frame(St0)}; -build_call(Name, Arity, St0) when is_atom(Name) -> +build_call(#k_local{name=Name}, Arity, St0) when is_atom(Name) -> {Lbl,St1} = local_func_label(Name, Arity, need_stack_frame(St0)), {[{call,Arity,{f,Lbl}}],St1}. @@ -1247,16 +1527,15 @@ free_dead([Any|Stk], Y, Instr, StkAcc) -> free_dead(Stk, Y+1, Instr, [Any|StkAcc]); free_dead([], _, Instr, StkAcc) -> {Instr,reverse(StkAcc)}. -enter_cg({var,_V} = Var, As, Le, Vdb, Bef, St0) -> +enter_cg(#k_var{} = Var, As, Le, Vdb, Bef, St0) -> {Sis,Int} = cg_setup_call(As++[Var], Bef, Le#l.i, Vdb), %% Build complete code and final stack/register state. Arity = length(As), {Sis ++ [line(Le),{call_fun,Arity},return], clear_dead(Int#sr{reg=clear_regs(Int#sr.reg)}, Le#l.i, Vdb), need_stack_frame(St0)}; -enter_cg({remote,Mod,Name}, As, Le, Vdb, Bef, St0) - when element(1, Mod) =:= var; - element(1, Name) =:= var -> +enter_cg(#k_remote{mod=Mod,name=Name}, As, Le, Vdb, Bef, St0) + when is_record(Mod, k_var); is_record(Name, k_var) -> {Sis,Int} = cg_setup_call(As++[Mod,Name], Bef, Le#l.i, Vdb), %% Build complete code and final stack/register state. Arity = length(As), @@ -1274,19 +1553,19 @@ enter_cg(Func, As, Le, Vdb, Bef, St0) -> clear_dead(Int#sr{reg=clear_regs(Int#sr.reg)}, Le#l.i, Vdb), St1}. -build_enter({remote,{atom,erlang},{atom,'!'}}, 2, St0) -> +build_enter(#k_remote{mod=#k_atom{val=erlang},name=#k_atom{val='!'}}, 2, St0) -> {[send,return],need_stack_frame(St0)}; -build_enter({remote,{atom,Mod},{atom,Name}}, Arity, St0) -> +build_enter(#k_remote{mod=#k_atom{val=Mod},name=#k_atom{val=Name}}, Arity, St0) -> St1 = case trap_bif(Mod, Name, Arity) of true -> need_stack_frame(St0); false -> St0 end, {[{call_ext_only,Arity,{extfunc,Mod,Name,Arity}}],St1}; -build_enter(Name, Arity, St0) when is_atom(Name) -> +build_enter(#k_local{name=Name}, Arity, St0) when is_atom(Name) -> {Lbl,St1} = local_func_label(Name, Arity, St0), {[{call_only,Arity,{f,Lbl}}],St1}. -enter_line({remote,{atom,Mod},{atom,Name}}, Arity, Le) -> +enter_line(#k_remote{mod=#k_atom{val=Mod},name=#k_atom{val=Name}}, Arity, Le) -> case erl_bifs:is_safe(Mod, Name, Arity) of false -> %% Tail-recursive call, possibly to a BIF. @@ -1334,6 +1613,22 @@ trap_bif(erlang, group_leader, 2) -> true; trap_bif(erlang, exit, 2) -> true; trap_bif(_, _, _) -> false. +%% bif_cg(#k_bif{}, Le, Vdb, StackReg, State) -> +%% {[Ainstr],StackReg,State}. +%% Generate code a BIF. + +bif_cg(#k_bif{op=#k_internal{name=Name},args=As,ret=Rs}, Le, Vdb, Bef, St) -> + internal_cg(Name, As, Rs, Le, Vdb, Bef, St); +bif_cg(#k_bif{op=#k_remote{mod=#k_atom{val=erlang},name=#k_atom{val=Name}}, + args=As,ret=Rs}, Le, Vdb, Bef, St) -> + Ar = length(As), + case is_gc_bif(Name, Ar) of + false -> + bif_cg(Name, As, Rs, Le, Vdb, Bef, St); + true -> + gc_bif_cg(Name, As, Rs, Le, Vdb, Bef, St) + end. + %% internal_cg(Bif, [Arg], [Ret], Le, Vdb, StackReg, State) -> %% {[Ainstr],StackReg,State}. @@ -1352,8 +1647,8 @@ internal_cg(dsetelement, [Index0,Tuple0,New0], _Rs, Le, Vdb, Bef, St0) -> clear_dead(Bef, Le#l.i, Vdb), St0}; internal_cg(make_fun, [Func0,Arity0|As], Rs, Le, Vdb, Bef, St0) -> %% This behaves more like a function call. - {atom,Func} = Func0, - {integer,Arity} = Arity0, + #k_atom{val=Func} = Func0, + #k_int{val=Arity} = Arity0, {Sis,Int} = cg_setup_call(As, Bef, Le#l.i, Vdb), Reg = load_vars(Rs, clear_regs(Int#sr.reg)), {FuncLbl,St1} = local_func_label(Func, Arity, St0), @@ -1373,7 +1668,7 @@ internal_cg(raise, As, Rs, Le, Vdb, Bef, St) -> %% bif_cg(Bif, [Arg], [Ret], Le, Vdb, StackReg, State) -> %% {[Ainstr],StackReg,State}. -bif_cg(Bif, As, [{var,V}], Le, Vdb, Bef, St0) -> +bif_cg(Bif, As, [#k_var{name=V}], Le, Vdb, Bef, St0) -> Ars = cg_reg_args(As, Bef), %% If we are inside a catch and in a body (not in guard) and the @@ -1411,7 +1706,7 @@ bif_cg(Bif, As, [{var,V}], Le, Vdb, Bef, St0) -> %% gc_bif_cg(Bif, [Arg], [Ret], Le, Vdb, StackReg, State) -> %% {[Ainstr],StackReg,State}. -gc_bif_cg(Bif, As, [{var,V}], Le, Vdb, Bef, St0) -> +gc_bif_cg(Bif, As, [#k_var{name=V}], Le, Vdb, Bef, St0) -> Ars = cg_reg_args(As, Bef), %% If we are inside a catch and in a body (not in guard) and the @@ -1457,7 +1752,7 @@ recv_loop_cg(Te, Rvar, Rm, Tes, Rs, Le, Vdb, Bef, St0) -> %% cg_recv_mesg( ) -> {[Ainstr],Aft,St}. -cg_recv_mesg({var,R}, Rm, Tl, Bef, St0) -> +cg_recv_mesg(#k_var{name=R}, Rm, Tl, Bef, St0) -> Int0 = Bef#sr{reg=put_reg(R, Bef#sr.reg)}, Ret = fetch_reg(R, Int0#sr.reg), %% Int1 = clear_dead(Int0, I, Rm#l.vdb), @@ -1467,22 +1762,22 @@ cg_recv_mesg({var,R}, Rm, Tl, Bef, St0) -> %% cg_recv_wait(Te, Tes, I, Vdb, Int2, St3) -> {[Ainstr],Aft,St}. -cg_recv_wait({atom,infinity}, Tes, I, Bef, St0) -> +cg_recv_wait(#k_atom{val=infinity}, #cg_block{anno=Le,es=Tes}, I, Bef, St0) -> %% We know that the 'after' body will never be executed. %% But to keep the stack and register information up to date, %% we will generate the code for the 'after' body, and then discard it. - Int1 = clear_dead(Bef, I, Tes#l.vdb), - {_,Int2,St1} = cg_block(Tes#l.ke, Tes#l.i, Tes#l.vdb, - Int1#sr{reg=clear_regs(Int1#sr.reg)}, St0), + Int1 = clear_dead(Bef, I, Le#l.vdb), + {_,Int2,St1} = cg_block(Tes, Le#l.i, Le#l.vdb, + Int1#sr{reg=clear_regs(Int1#sr.reg)}, St0), {[{wait,{f,St1#cg.recv}}],Int2,St1}; -cg_recv_wait({integer,0}, Tes, _I, Bef, St0) -> - {Tis,Int,St1} = cg_block(Tes#l.ke, Tes#l.i, Tes#l.vdb, Bef, St0), +cg_recv_wait(#k_int{val=0}, #cg_block{anno=Le,es=Tes}, _I, Bef, St0) -> + {Tis,Int,St1} = cg_block(Tes, Le#l.i, Le#l.vdb, Bef, St0), {[timeout|Tis],Int,St1}; -cg_recv_wait(Te, Tes, I, Bef, St0) -> +cg_recv_wait(Te, #cg_block{anno=Le,es=Tes}, I, Bef, St0) -> Reg = cg_reg_arg(Te, Bef), %% Must have empty registers here! Bug if anything in registers. - Int0 = clear_dead(Bef, I, Tes#l.vdb), - {Tis,Int,St1} = cg_block(Tes#l.ke, Tes#l.i, Tes#l.vdb, + Int0 = clear_dead(Bef, I, Le#l.vdb), + {Tis,Int,St1} = cg_block(Tes, Le#l.i, Le#l.vdb, Int0#sr{reg=clear_regs(Int0#sr.reg)}, St0), {[{wait_timeout,{f,St1#cg.recv},Reg},timeout] ++ Tis,Int,St1}. @@ -1500,7 +1795,7 @@ try_cg(Ta, Vs, Tb, Evs, Th, Rs, Le, Vdb, Bef, St0) -> {B,St1} = new_label(St0), %Body label {H,St2} = new_label(St1), %Handler label {E,St3} = new_label(St2), %End label - TryTag = Ta#l.i, + #l{i=TryTag} = get_kanno(Ta), Int1 = Bef#sr{stk=put_catch(TryTag, Bef#sr.stk)}, TryReg = fetch_stack({catch_tag,TryTag}, Int1#sr.stk), {Ais,Int2,St4} = cg(Ta, Vdb, Int1, St3#cg{break=B,in_catch=true}), @@ -1520,7 +1815,7 @@ try_cg(Ta, Vs, Tb, Evs, Th, Rs, Le, Vdb, Bef, St0) -> try_enter_cg(Ta, Vs, Tb, Evs, Th, Le, Vdb, Bef, St0) -> {B,St1} = new_label(St0), %Body label {H,St2} = new_label(St1), %Handler label - TryTag = Ta#l.i, + #l{i=TryTag} = get_kanno(Ta), Int1 = Bef#sr{stk=put_catch(TryTag, Bef#sr.stk)}, TryReg = fetch_stack({catch_tag,TryTag}, Int1#sr.stk), {Ais,Int2,St3} = cg(Ta, Vdb, Int1, St2#cg{break=B,in_catch=true}), @@ -1538,7 +1833,7 @@ try_enter_cg(Ta, Vs, Tb, Evs, Th, Le, Vdb, Bef, St0) -> %% catch_cg(CatchBlock, Ret, Le, Vdb, Bef, St) -> {[Ainstr],Aft,St}. -catch_cg(C, {var,R}, Le, Vdb, Bef, St0) -> +catch_cg(#cg_block{es=C}, #k_var{name=R}, Le, Vdb, Bef, St0) -> {B,St1} = new_label(St0), CatchTag = Le#l.i, Int1 = Bef#sr{stk=put_catch(CatchTag, Bef#sr.stk)}, @@ -1552,8 +1847,8 @@ catch_cg(C, {var,R}, Le, Vdb, Bef, St0) -> clear_dead(Aft, Le#l.i, Vdb), St2#cg{break=St1#cg.break,in_catch=St1#cg.in_catch}}. -%% set_cg([Var], Constr, Le, Vdb, Bef, St) -> {[Ainstr],Aft,St}. -%% We have to be careful how a 'set' works. First the structure is +%% put_cg([Var], Constr, Le, Vdb, Bef, St) -> {[Ainstr],Aft,St}. +%% We have to be careful how a 'put' works. First the structure is %% built, then it is filled and finally things can be cleared. The %% annotation must reflect this and make sure that the return %% variable is allocated first. @@ -1561,13 +1856,14 @@ catch_cg(C, {var,R}, Le, Vdb, Bef, St0) -> %% put_list and put_map are atomic instructions, both of %% which can safely resuse one of the source registers as target. -set_cg([{var,R}], {cons,Es}, Le, Vdb, Bef, St) -> - [S1,S2] = cg_reg_args(Es, Bef), +put_cg([#k_var{name=R}], #k_cons{hd=Hd,tl=Tl}, Le, Vdb, Bef, St) -> + [S1,S2] = cg_reg_args([Hd,Tl], Bef), Int0 = clear_dead(Bef, Le#l.i, Vdb), Int1 = Int0#sr{reg=put_reg(R, Int0#sr.reg)}, Ret = fetch_reg(R, Int1#sr.reg), {[{put_list,S1,S2,Ret}], Int1, St}; -set_cg([{var,R}], {binary,Segs}, Le, Vdb, Bef, #cg{bfail=Bfail}=St) -> +put_cg([#k_var{name=R}], #k_binary{segs=Segs}, Le, Vdb, Bef, + #cg{bfail=Bfail}=St) -> %% At run-time, binaries are constructed in three stages: %% 1) First the size of the binary is calculated. %% 2) Then the binary is allocated. @@ -1595,7 +1891,9 @@ set_cg([{var,R}], {binary,Segs}, Le, Vdb, Bef, #cg{bfail=Bfail}=St) -> {Sis++Code,Aft,St}; %% Map: single variable key. -set_cg([{var,R}], {map,Op,Map,[{map_pair,{var,_}=K,V}]}, Le, Vdb, Bef, St0) -> +put_cg([#k_var{name=R}], #k_map{op=Op,var=Map, + es=[#k_map_pair{key=#k_var{}=K,val=V}]}, + Le, Vdb, Bef, St0) -> {Sis,Int0} = maybe_adjust_stack(Bef, Le#l.i, Le#l.i+1, Vdb, St0), SrcReg = cg_reg_arg_prefer_y(Map, Int0), @@ -1610,22 +1908,23 @@ set_cg([{var,R}], {map,Op,Map,[{map_pair,{var,_}=K,V}]}, Le, Vdb, Bef, St0) -> Aft = Aft0#sr{reg=put_reg(R, Aft0#sr.reg)}, Target = fetch_reg(R, Aft#sr.reg), - {Is,St1} = set_cg_map(Line, Op, SrcReg, Target, Live, List, St0), + {Is,St1} = put_cg_map(Line, Op, SrcReg, Target, Live, List, St0), {Sis++Is,Aft,St1}; %% Map: (possibly) multiple literal keys. -set_cg([{var,R}], {map,Op,Map,Es}, Le, Vdb, Bef, St0) -> +put_cg([#k_var{name=R}], #k_map{op=Op,var=Map,es=Es}, Le, Vdb, Bef, St0) -> %% assert key literals - [] = [Var||{map_pair,{var,_}=Var,_} <- Es], + [] = [Var || #k_map_pair{key=#k_var{}=Var} <- Es], {Sis,Int0} = maybe_adjust_stack(Bef, Le#l.i, Le#l.i+1, Vdb, St0), SrcReg = cg_reg_arg_prefer_y(Map, Int0), Line = line(Le#l.a), %% fetch registers for values to be put into the map - Pairs = [{K,V} || {_,K,V} <- Es], - List = flatmap(fun({K,V}) -> [K,cg_reg_arg(V,Int0)] end, Pairs), + List = flatmap(fun(#k_map_pair{key=K,val=V}) -> + [atomic(K),cg_reg_arg(V, Int0)] + end, Es), Live = max_reg(Bef#sr.reg), @@ -1634,16 +1933,16 @@ set_cg([{var,R}], {map,Op,Map,Es}, Le, Vdb, Bef, St0) -> Aft = Aft0#sr{reg=put_reg(R, Aft0#sr.reg)}, Target = fetch_reg(R, Aft#sr.reg), - {Is,St1} = set_cg_map(Line, Op, SrcReg, Target, Live, List, St0), + {Is,St1} = put_cg_map(Line, Op, SrcReg, Target, Live, List, St0), {Sis++Is,Aft,St1}; %% Everything else. -set_cg([{var,R}], Con, Le, Vdb, Bef, St) -> +put_cg([#k_var{name=R}], Con, Le, Vdb, Bef, St) -> %% Find a place for the return register first. Int = Bef#sr{reg=put_reg(R, Bef#sr.reg)}, Ret = fetch_reg(R, Int#sr.reg), Ais = case Con of - {tuple,Es} -> + #k_tuple{es=Es} -> [{put_tuple,length(Es),Ret}] ++ cg_build_args(Es, Bef); Other -> [{move,cg_reg_arg(Other, Int),Ret}] @@ -1651,7 +1950,7 @@ set_cg([{var,R}], Con, Le, Vdb, Bef, St) -> {Ais,clear_dead(Int, Le#l.i, Vdb),St}. -set_cg_map(Line, Op0, SrcReg, Target, Live, List, St0) -> +put_cg_map(Line, Op0, SrcReg, Target, Live, List, St0) -> Bfail = St0#cg.bfail, Fail = {f,St0#cg.bfail}, Op = case Op0 of @@ -1865,7 +2164,8 @@ cg_bin_opt_1([I|Is]) -> cg_bin_opt_1([]) -> []. -cg_bin_put({bin_seg,[],S0,U,T,Fs,[E0,Next]}, Fail, Bef) -> +cg_bin_put(#k_bin_seg{size=S0,unit=U,type=T,flags=Fs,seg=E0,next=Next}, + Fail, Bef) -> S1 = cg_reg_arg(S0, Bef), E1 = cg_reg_arg(E0, Bef), {Format,Op} = case T of @@ -1882,7 +2182,7 @@ cg_bin_put({bin_seg,[],S0,U,T,Fs,[E0,Next]}, Fail, Bef) -> utf -> [{Op,Fail,{field_flags,Fs},E1}|cg_bin_put(Next, Fail, Bef)] end; -cg_bin_put({bin_end,[]}, _, _) -> []. +cg_bin_put(#k_bin_end{}, _, _) -> []. cg_build_args(As, Bef) -> [{put,cg_reg_arg(A, Bef)} || A <- As]. @@ -1936,11 +2236,11 @@ get_locked_regs([], _) -> []. cg_reg_args(As, Bef) -> [cg_reg_arg(A, Bef) || A <- As]. -cg_reg_arg({var,V}, Bef) -> fetch_var(V, Bef); -cg_reg_arg(Literal, _) -> Literal. +cg_reg_arg(#k_var{name=V}, Bef) -> fetch_var(V, Bef); +cg_reg_arg(Literal, _) -> atomic(Literal). -cg_reg_arg_prefer_y({var,V}, Bef) -> fetch_var_prefer_y(V, Bef); -cg_reg_arg_prefer_y(Literal, _) -> Literal. +cg_reg_arg_prefer_y(#k_var{name=V}, Bef) -> fetch_var_prefer_y(V, Bef); +cg_reg_arg_prefer_y(Literal, _) -> atomic(Literal). %% cg_setup_call([Arg], Bef, Cur, Vdb) -> {[Instr],Aft}. %% Do the complete setup for a call/enter. @@ -1978,9 +2278,9 @@ cg_call_args(As, Bef, I, Vdb) -> load_arg_regs(Regs, As) -> load_arg_regs(Regs, As, 0). -load_arg_regs([_|Rs], [{var,V}|As], I) -> [{I,V}|load_arg_regs(Rs, As, I+1)]; +load_arg_regs([_|Rs], [#k_var{name=V}|As], I) -> [{I,V}|load_arg_regs(Rs, As, I+1)]; load_arg_regs([_|Rs], [A|As], I) -> [{I,A}|load_arg_regs(Rs, As, I+1)]; -load_arg_regs([], [{var,V}|As], I) -> [{I,V}|load_arg_regs([], As, I+1)]; +load_arg_regs([], [#k_var{name=V}|As], I) -> [{I,V}|load_arg_regs([], As, I+1)]; load_arg_regs([], [A|As], I) -> [{I,A}|load_arg_regs([], As, I+1)]; load_arg_regs(Rs, [], _) -> Rs. @@ -2016,12 +2316,13 @@ move_unsaved([], _, Regs, Acc) -> {Acc,Regs}. gen_moves(As, Sr) -> gen_moves(As, Sr, 0, []). -gen_moves([{var,V}|As], Sr, I, Acc) -> +gen_moves([#k_var{name=V}|As], Sr, I, Acc) -> case fetch_var(V, Sr) of {x,I} -> gen_moves(As, Sr, I+1, Acc); Reg -> gen_moves(As, Sr, I+1, [{move,Reg,{x,I}}|Acc]) end; -gen_moves([A|As], Sr, I, Acc) -> +gen_moves([A0|As], Sr, I, Acc) -> + A = atomic(A0), gen_moves(As, Sr, I+1, [{move,A,{x,I}}|Acc]); gen_moves([], _, _, Acc) -> lists:keysort(3, Acc). @@ -2190,7 +2491,7 @@ fetch_var_prefer_y(V, #sr{reg=Reg,stk=Stk}) -> end. load_vars(Vs, Regs) -> - foldl(fun ({var,V}, Rs) -> put_reg(V, Rs) end, Regs, Vs). + foldl(fun (#k_var{name=V}, Rs) -> put_reg(V, Rs) end, Regs, Vs). %% put_reg(Val, Regs) -> Regs. %% find_reg(Val, Regs) -> {ok,r{R}} | error. @@ -2291,6 +2592,16 @@ put_catch(Tag, [Other|Stk], Acc) -> drop_catch(Tag, [{{catch_tag,Tag}}|Stk]) -> [free|Stk]; drop_catch(Tag, [Other|Stk]) -> [Other|drop_catch(Tag, Stk)]. +%% atomic(Klit) -> Lit. +%% atomic_list([Klit]) -> [Lit]. + +atomic(#k_literal{val=V}) -> {literal,V}; +atomic(#k_int{val=I}) -> {integer,I}; +atomic(#k_float{val=F}) -> {float,F}; +atomic(#k_atom{val=A}) -> {atom,A}; +%%atomic(#k_char{val=C}) -> {char,C}; +atomic(#k_nil{}) -> nil. + %% new_label(St) -> {L,St}. new_label(#cg{lcount=Next}=St) -> @@ -2333,3 +2644,86 @@ flatmapfoldl(F, Accu0, [Hd|Tail]) -> {Rs,Accu2} = flatmapfoldl(F, Accu1, Tail), {R++Rs,Accu2}; flatmapfoldl(_, Accu, []) -> {[],Accu}. + +%% Keep track of life time for variables. +%% +%% init_vars([{var,VarName}]) -> Vdb. +%% new_vars([VarName], I, Vdb) -> Vdb. +%% use_vars([VarName], I, Vdb) -> Vdb. +%% add_var(VarName, F, L, Vdb) -> Vdb. +%% +%% The list of variable names for new_vars/3 and use_vars/3 +%% must be sorted. + +init_vars(Vs) -> + vdb_new(Vs). + +new_vars([], _, Vdb) -> Vdb; +new_vars([V], I, Vdb) -> vdb_store_new(V, {V,I,I}, Vdb); +new_vars(Vs, I, Vdb) -> vdb_update_vars(Vs, Vdb, I). + +use_vars([], _, Vdb) -> + Vdb; +use_vars([V], I, Vdb) -> + case vdb_find(V, Vdb) of + {V,F,L} when I > L -> vdb_update(V, {V,F,I}, Vdb); + {V,_,_} -> Vdb; + error -> vdb_store_new(V, {V,I,I}, Vdb) + end; +use_vars(Vs, I, Vdb) -> vdb_update_vars(Vs, Vdb, I). + +add_var(V, F, L, Vdb) -> + vdb_store_new(V, {V,F,L}, Vdb). + +%% vdb + +vdb_new(Vs) -> + ordsets:from_list([{V,0,0} || #k_var{name=V} <- Vs]). + +-type var() :: atom(). + +-spec vdb_find(var(), [vdb_entry()]) -> 'error' | vdb_entry(). + +vdb_find(V, Vdb) -> + case lists:keyfind(V, 1, Vdb) of + false -> error; + Vd -> Vd + end. + +vdb_update(V, Update, [{V,_,_}|Vdb]) -> + [Update|Vdb]; +vdb_update(V, Update, [Vd|Vdb]) -> + [Vd|vdb_update(V, Update, Vdb)]. + +vdb_store_new(V, New, [{V1,_,_}=Vd|Vdb]) when V > V1 -> + [Vd|vdb_store_new(V, New, Vdb)]; +vdb_store_new(V, New, [{V1,_,_}|_]=Vdb) when V < V1 -> + [New|Vdb]; +vdb_store_new(_, New, []) -> [New]. + +vdb_update_vars([V|_]=Vs, [{V1,_,_}=Vd|Vdb], I) when V > V1 -> + [Vd|vdb_update_vars(Vs, Vdb, I)]; +vdb_update_vars([V|Vs], [{V1,_,_}|_]=Vdb, I) when V < V1 -> + %% New variable. + [{V,I,I}|vdb_update_vars(Vs, Vdb, I)]; +vdb_update_vars([V|Vs], [{_,F,L}=Vd|Vdb], I) -> + %% Existing variable. + if + I > L -> [{V,F,I}|vdb_update_vars(Vs, Vdb, I)]; + true -> [Vd|vdb_update_vars(Vs, Vdb, I)] + end; +vdb_update_vars([V|Vs], [], I) -> + %% New variable. + [{V,I,I}|vdb_update_vars(Vs, [], I)]; +vdb_update_vars([], Vdb, _) -> Vdb. + +%% vdb_sub(Min, Max, Vdb) -> Vdb. +%% Extract variables which are used before and after Min. Lock +%% variables alive after Max. + +vdb_sub(Min, Max, Vdb) -> + [ if L >= Max -> {V,F,locked}; + true -> Vd + end || {V,F,L}=Vd <- Vdb, + F < Min, + L >= Min ]. diff --git a/lib/compiler/src/v3_kernel.erl b/lib/compiler/src/v3_kernel.erl index cbc8bb1303..3eea058153 100644 --- a/lib/compiler/src/v3_kernel.erl +++ b/lib/compiler/src/v3_kernel.erl @@ -160,8 +160,7 @@ function({#c_var{name={F,Arity}=FA},Body}, St0) -> {#ifun{anno=Ab,vars=Kvs,body=B0},[],St2} = expr(Body, new_sub(), St1), {B1,_,St3} = ubody(B0, return, St2), %%B1 = B0, St3 = St2, %Null second pass - {#k_fdef{anno=#k{us=[],ns=[],a=Ab}, - func=F,arity=Arity,vars=Kvs,body=B1},St3} + {make_fdef(#k{us=[],ns=[],a=Ab}, F, Arity, Kvs, B1),St3} catch Class:Error -> Stack = erlang:get_stacktrace(), @@ -2262,9 +2261,8 @@ iletrec_funs_gen(Fs, FreeVs, St) -> Arity0 = length(Vs), {Fb1,_,Lst1} = ubody(Fb0, return, Lst0#kern{ff={N,Arity0}}), Arity = Arity0 + length(FreeVs), - Fun = #k_fdef{anno=#k{us=[],ns=[],a=Fa}, - func=N,arity=Arity, - vars=Vs ++ FreeVs,body=Fb1}, + Fun = make_fdef(#k{us=[],ns=[],a=Fa}, N, Arity, + Vs++FreeVs, Fb1), Lst1#kern{funs=[Fun|Lst1#kern.funs]} end, St, Fs). @@ -2408,8 +2406,7 @@ uexpr(#ifun{anno=A,vars=Vs,body=B0}, {break,Rs}, St0) -> %% No id annotation. Must invent a fun name. new_fun_name(St1) end, - Fun = #k_fdef{anno=#k{us=[],ns=[],a=A},func=Fname,arity=Arity, - vars=Vs ++ Fvs,body=B1}, + Fun = make_fdef(#k{us=[],ns=[],a=A}, Fname, Arity, Vs++Fvs, B1), {#k_bif{anno=#k{us=Free,ns=lit_list_vars(Rs),a=A}, op=#k_internal{name=make_fun,arity=length(Free)+2}, args=[#k_atom{val=Fname},#k_int{val=Arity}|Fvs], @@ -2426,6 +2423,16 @@ uexpr(Lit, {break,Rs0}, St0) -> add_local_function(_, #kern{funs=ignore}=St) -> St; add_local_function(F, #kern{funs=Funs}=St) -> St#kern{funs=[F|Funs]}. +%% Make a #k_fdef{}, making sure that the body is always a #k_match{}. +make_fdef(Anno, Name, Arity, Vs, #k_match{}=Body) -> + #k_fdef{anno=Anno,func=Name,arity=Arity,vars=Vs,body=Body}; +make_fdef(Anno, Name, Arity, Vs, Body) -> + Ka = get_kanno(Body), + Match = #k_match{anno=#k{us=Ka#k.us,ns=[],a=Ka#k.a}, + vars=Vs,body=Body,ret=[]}, + #k_fdef{anno=Anno,func=Name,arity=Arity,vars=Vs,body=Match}. + + %% handle_reuse_annos([#k_var{}], State) -> State. %% In general, it is only safe to reuse a variable for a match context %% if the original value of the variable will no longer be needed. diff --git a/lib/compiler/src/v3_kernel.hrl b/lib/compiler/src/v3_kernel.hrl index 7cd30b25a8..87011b7680 100644 --- a/lib/compiler/src/v3_kernel.hrl +++ b/lib/compiler/src/v3_kernel.hrl @@ -79,7 +79,7 @@ -record(k_guard_clause, {anno=[],guard,body}). -record(k_break, {anno=[],args=[]}). --record(k_guard_break, {anno=[],args=[]}). +-record(k_guard_break, {anno=[],args=[],locked=[]}). -record(k_return, {anno=[],args=[]}). %%k_get_anno(Thing) -> element(2, Thing). diff --git a/lib/compiler/src/v3_life.erl b/lib/compiler/src/v3_life.erl deleted file mode 100644 index be3ade47ff..0000000000 --- a/lib/compiler/src/v3_life.erl +++ /dev/null @@ -1,468 +0,0 @@ -%% -%% %CopyrightBegin% -%% -%% Copyright Ericsson AB 1999-2016. All Rights Reserved. -%% -%% Licensed under the Apache License, Version 2.0 (the "License"); -%% you may not use this file except in compliance with the License. -%% You may obtain a copy of the License at -%% -%% http://www.apache.org/licenses/LICENSE-2.0 -%% -%% Unless required by applicable law or agreed to in writing, software -%% distributed under the License is distributed on an "AS IS" BASIS, -%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -%% See the License for the specific language governing permissions and -%% limitations under the License. -%% -%% %CopyrightEnd% -%% -%% Purpose : Convert annotated kernel expressions to annotated beam format. - -%% This module creates beam format annotated with variable lifetime -%% information. Each thing is given an index and for each variable we -%% store the first and last index for its occurrence. The variable -%% database, VDB, attached to each thing is only relevant internally -%% for that thing. -%% -%% For nested things like matches the numbering continues locally and -%% the VDB for that thing refers to the variable usage within that -%% thing. Variables which live through a such a thing are internally -%% given a very large last index. Internally the indexes continue -%% after the index of that thing. This creates no problems as the -%% internal variable info never escapes and externally we only see -%% variable which are alive both before or after. -%% -%% This means that variables never "escape" from a thing and the only -%% way to get values from a thing is to "return" them, with 'break' or -%% 'return'. Externally these values become the return values of the -%% thing. This is no real limitation as most nested things have -%% multiple threads so working out a common best variable usage is -%% difficult. - --module(v3_life). - --export([module/2]). - --export([vdb_find/2]). - --import(lists, [member/2,map/2,reverse/1,sort/1]). --import(ordsets, [add_element/2,intersection/2,union/2]). - --include("v3_kernel.hrl"). --include("v3_life.hrl"). - --type fa() :: {atom(),arity()}. - -%% These are not defined in v3_kernel.hrl. -get_kanno(Kthing) -> element(2, Kthing). -%%set_kanno(Kthing, Anno) -> setelement(2, Kthing, Anno). - --spec module(#k_mdef{}, [compile:option()]) -> - {'ok',{module(),[fa()],[_],[_]}}. - -module(#k_mdef{name=M,exports=Es,attributes=As,body=Fs0}, _Opts) -> - Fs1 = functions(Fs0, []), - {ok,{M,Es,As,Fs1}}. - -functions([F|Fs], Acc) -> - functions(Fs, [function(F)|Acc]); -functions([], Acc) -> reverse(Acc). - -%% function(Kfunc) -> Func. - -function(#k_fdef{anno=#k{a=Anno},func=F,arity=Ar,vars=Vs,body=Kb}) -> - try - As = var_list(Vs), - Vdb0 = init_vars(As), - %% Force a top-level match! - B0 = case Kb of - #k_match{} -> Kb; - _ -> - Ka = get_kanno(Kb), - #k_match{anno=#k{us=Ka#k.us,ns=[],a=Ka#k.a}, - vars=Vs,body=Kb,ret=[]} - end, - {B1,_,Vdb1} = body(B0, 1, Vdb0), - {function,F,Ar,As,B1,Vdb1,Anno} - catch - Class:Error -> - Stack = erlang:get_stacktrace(), - io:fwrite("Function: ~w/~w\n", [F,Ar]), - erlang:raise(Class, Error, Stack) - end. - -%% body(Kbody, I, Vdb) -> {[Expr],MaxI,Vdb}. -%% Handle a body. - -body(#k_seq{arg=Ke,body=Kb}, I, Vdb0) -> - %%ok = io:fwrite("life ~w:~p~n", [?LINE,{Ke,I,Vdb0}]), - A = get_kanno(Ke), - Vdb1 = use_vars(union(A#k.us, A#k.ns), I, Vdb0), - {Es,MaxI,Vdb2} = body(Kb, I+1, Vdb1), - E = expr(Ke, I, Vdb2), - {[E|Es],MaxI,Vdb2}; -body(Ke, I, Vdb0) -> - %%ok = io:fwrite("life ~w:~p~n", [?LINE,{Ke,I,Vdb0}]), - A = get_kanno(Ke), - Vdb1 = use_vars(union(A#k.us, A#k.ns), I, Vdb0), - E = expr(Ke, I, Vdb1), - {[E],I,Vdb1}. - -%% protected(Kprotected, I, Vdb) -> Protected. -%% Only used in guards. - -protected(#k_protected{anno=A,arg=Ts,ret=Rs}, I, Vdb) -> - %% Lock variables that are alive before try and used afterwards. - %% Don't lock variables that are only used inside the protected - %% expression. - Pdb0 = vdb_sub(I, I+1, Vdb), - {T,MaxI,Pdb1} = body(Ts, I+1, Pdb0), - Pdb2 = use_vars(A#k.ns, MaxI+1, Pdb1), %Save "return" values - #l{ke={protected,T,var_list(Rs)},i=I,a=A#k.a,vdb=Pdb2}. - -%% expr(Kexpr, I, Vdb) -> Expr. - -expr(#k_test{anno=A,op=Op,args=As,inverted=Inverted}, I, _Vdb) -> - #l{ke={test,test_op(Op),atomic_list(As),Inverted},i=I,a=A#k.a}; -expr(#k_call{anno=A,op=Op,args=As,ret=Rs}, I, _Vdb) -> - #l{ke={call,call_op(Op),atomic_list(As),var_list(Rs)},i=I,a=A#k.a}; -expr(#k_enter{anno=A,op=Op,args=As}, I, _Vdb) -> - #l{ke={enter,call_op(Op),atomic_list(As)},i=I,a=A#k.a}; -expr(#k_bif{anno=A,op=Op,args=As,ret=Rs}, I, _Vdb) -> - Bif = k_bif(A, Op, As, Rs), - #l{ke=Bif,i=I,a=A#k.a}; -expr(#k_match{anno=A,body=Kb,ret=Rs}, I, Vdb) -> - %% Work out imported variables which need to be locked. - Mdb = vdb_sub(I, I+1, Vdb), - M = match(Kb, A#k.us, I+1, [], Mdb), - #l{ke={match,M,var_list(Rs)},i=I,vdb=use_vars(A#k.us, I+1, Mdb),a=A#k.a}; -expr(#k_guard_match{anno=A,body=Kb,ret=Rs}, I, Vdb) -> - %% Work out imported variables which need to be locked. - Mdb = vdb_sub(I, I+1, Vdb), - M = match(Kb, A#k.us, I+1, [], Mdb), - #l{ke={guard_match,M,var_list(Rs)},i=I,vdb=use_vars(A#k.us, I+1, Mdb),a=A#k.a}; -expr(#k_try{}=Try, I, Vdb) -> - body_try(Try, I, Vdb); -expr(#k_protected{}=Protected, I, Vdb) -> - protected(Protected, I, Vdb); -expr(#k_try_enter{anno=A,arg=Ka,vars=Vs,body=Kb,evars=Evs,handler=Kh}, I, Vdb) -> - %% Lock variables that are alive before the catch and used afterwards. - %% Don't lock variables that are only used inside the try. - Tdb0 = vdb_sub(I, I+1, Vdb), - %% This is the tricky bit. Lock variables in Arg that are used in - %% the body and handler. Add try tag 'variable'. - Ab = get_kanno(Kb), - Ah = get_kanno(Kh), - Tdb1 = use_vars(union(Ab#k.us, Ah#k.us), I+3, Tdb0), - Tdb2 = vdb_sub(I, I+2, Tdb1), - Vnames = fun (Kvar) -> Kvar#k_var.name end, %Get the variable names - {Aes,_,Adb} = body(Ka, I+2, add_var({catch_tag,I+1}, I+1, 1000000, Tdb2)), - {Bes,_,Bdb} = body(Kb, I+4, new_vars(sort(map(Vnames, Vs)), I+3, Tdb2)), - {Hes,_,Hdb} = body(Kh, I+4, new_vars(sort(map(Vnames, Evs)), I+3, Tdb2)), - #l{ke={try_enter,#l{ke={block,Aes},i=I+1,vdb=Adb,a=[]}, - var_list(Vs),#l{ke={block,Bes},i=I+3,vdb=Bdb,a=[]}, - var_list(Evs),#l{ke={block,Hes},i=I+3,vdb=Hdb,a=[]}}, - i=I,vdb=Tdb1,a=A#k.a}; -expr(#k_catch{anno=A,body=Kb,ret=[R]}, I, Vdb) -> - %% Lock variables that are alive before the catch and used afterwards. - %% Don't lock variables that are only used inside the catch. - %% Add catch tag 'variable'. - Cdb0 = vdb_sub(I, I+1, Vdb), - {Es,_,Cdb1} = body(Kb, I+1, add_var({catch_tag,I}, I, locked, Cdb0)), - #l{ke={'catch',Es,variable(R)},i=I,vdb=Cdb1,a=A#k.a}; -expr(#k_receive{anno=A,var=V,body=Kb,timeout=T,action=Ka,ret=Rs}, I, Vdb) -> - %% Work out imported variables which need to be locked. - Rdb = vdb_sub(I, I+1, Vdb), - M = match(Kb, add_element(V#k_var.name, A#k.us), I+1, [], - new_vars([V#k_var.name], I, Rdb)), - {Tes,_,Adb} = body(Ka, I+1, Rdb), - #l{ke={receive_loop,atomic(T),variable(V),M, - #l{ke=Tes,i=I+1,vdb=Adb,a=[]},var_list(Rs)}, - i=I,vdb=use_vars(A#k.us, I+1, Vdb),a=A#k.a}; -expr(#k_receive_accept{anno=A}, I, _Vdb) -> - #l{ke=receive_accept,i=I,a=A#k.a}; -expr(#k_receive_next{anno=A}, I, _Vdb) -> - #l{ke=receive_next,i=I,a=A#k.a}; -expr(#k_put{anno=A,arg=Arg,ret=Rs}, I, _Vdb) -> - #l{ke={set,var_list(Rs),literal(Arg, [])},i=I,a=A#k.a}; -expr(#k_break{anno=A,args=As}, I, _Vdb) -> - #l{ke={break,atomic_list(As)},i=I,a=A#k.a}; -expr(#k_guard_break{anno=A,args=As}, I, Vdb) -> - Locked = [V || {V,_,_} <- Vdb], - #l{ke={guard_break,atomic_list(As),Locked},i=I,a=A#k.a}; -expr(#k_return{anno=A,args=As}, I, _Vdb) -> - #l{ke={return,atomic_list(As)},i=I,a=A#k.a}. - -body_try(#k_try{anno=A,arg=Ka,vars=Vs,body=Kb,evars=Evs,handler=Kh,ret=Rs}, - I, Vdb) -> - %% Lock variables that are alive before the catch and used afterwards. - %% Don't lock variables that are only used inside the try. - Tdb0 = vdb_sub(I, I+1, Vdb), - %% This is the tricky bit. Lock variables in Arg that are used in - %% the body and handler. Add try tag 'variable'. - Ab = get_kanno(Kb), - Ah = get_kanno(Kh), - Tdb1 = use_vars(union(Ab#k.us, Ah#k.us), I+3, Tdb0), - Tdb2 = vdb_sub(I, I+2, Tdb1), - Vnames = fun (Kvar) -> Kvar#k_var.name end, %Get the variable names - {Aes,_,Adb} = body(Ka, I+2, add_var({catch_tag,I+1}, I+1, locked, Tdb2)), - {Bes,_,Bdb} = body(Kb, I+4, new_vars(sort(map(Vnames, Vs)), I+3, Tdb2)), - {Hes,_,Hdb} = body(Kh, I+4, new_vars(sort(map(Vnames, Evs)), I+3, Tdb2)), - #l{ke={'try',#l{ke={block,Aes},i=I+1,vdb=Adb,a=[]}, - var_list(Vs),#l{ke={block,Bes},i=I+3,vdb=Bdb,a=[]}, - var_list(Evs),#l{ke={block,Hes},i=I+3,vdb=Hdb,a=[]}, - var_list(Rs)}, - i=I,vdb=Tdb1,a=A#k.a}. - -%% call_op(Op) -> Op. -%% test_op(Op) -> Op. -%% Do any necessary name translations here to munge into beam format. - -call_op(#k_local{name=N}) -> N; -call_op(#k_remote{mod=M,name=N}) -> {remote,atomic(M),atomic(N)}; -call_op(Other) -> variable(Other). - -test_op(#k_remote{mod=#k_atom{val=erlang},name=#k_atom{val=N}}) -> N. - -%% k_bif(Anno, Op, [Arg], [Ret], Vdb) -> Expr. -%% Build bifs. - -k_bif(_A, #k_internal{name=Name}, As, Rs) -> - {internal,Name,atomic_list(As),var_list(Rs)}; -k_bif(_A, #k_remote{mod=#k_atom{val=erlang},name=#k_atom{val=Name}}, As, Rs) -> - Ar = length(As), - case is_gc_bif(Name, Ar) of - false -> - {bif,Name,atomic_list(As),var_list(Rs)}; - true -> - {gc_bif,Name,atomic_list(As),var_list(Rs)} - end. - -%% match(Kexpr, [LockVar], I, Vdb) -> Expr. -%% Convert match tree to old format. - -match(#k_alt{anno=A,first=Kf,then=Kt}, Ls, I, Ctxt, Vdb0) -> - Vdb1 = use_vars(union(A#k.us, Ls), I, Vdb0), - F = match(Kf, Ls, I+1, Ctxt, Vdb1), - T = match(Kt, Ls, I+1, Ctxt, Vdb1), - #l{ke={alt,F,T},i=I,vdb=Vdb1,a=A#k.a}; -match(#k_select{anno=A,var=V,types=Kts}, Ls0, I, Ctxt, Vdb0) -> - Vanno = get_kanno(V), - Ls1 = case member(no_usage, Vanno) of - false -> add_element(V#k_var.name, Ls0); - true -> Ls0 - end, - Anno = case member(reuse_for_context, Vanno) of - true -> [reuse_for_context|A#k.a]; - false -> A#k.a - end, - Vdb1 = use_vars(union(A#k.us, Ls1), I, Vdb0), - Ts = [type_clause(Tc, Ls1, I+1, Ctxt, Vdb1) || Tc <- Kts], - #l{ke={select,literal(V, Ctxt),Ts},i=I,vdb=Vdb1,a=Anno}; -match(#k_guard{anno=A,clauses=Kcs}, Ls, I, Ctxt, Vdb0) -> - Vdb1 = use_vars(union(A#k.us, Ls), I, Vdb0), - Cs = [guard_clause(G, Ls, I+1, Ctxt, Vdb1) || G <- Kcs], - #l{ke={guard,Cs},i=I,vdb=Vdb1,a=A#k.a}; -match(Other, Ls, I, _Ctxt, Vdb0) -> - Vdb1 = use_vars(Ls, I, Vdb0), - {B,_,Vdb2} = body(Other, I+1, Vdb1), - #l{ke={block,B},i=I,vdb=Vdb2,a=[]}. - -type_clause(#k_type_clause{anno=A,type=T,values=Kvs}, Ls, I, Ctxt, Vdb0) -> - %%ok = io:format("life ~w: ~p~n", [?LINE,{T,Kvs}]), - Vdb1 = use_vars(union(A#k.us, Ls), I+1, Vdb0), - Vs = [val_clause(Vc, Ls, I+1, Ctxt, Vdb1) || Vc <- Kvs], - #l{ke={type_clause,type(T),Vs},i=I,vdb=Vdb1,a=A#k.a}. - -val_clause(#k_val_clause{anno=A,val=V,body=Kb}, Ls0, I, Ctxt0, Vdb0) -> - New = (get_kanno(V))#k.ns, - Bus = (get_kanno(Kb))#k.us, - %%ok = io:format("Ls0 = ~p, Used=~p\n New=~p, Bus=~p\n", [Ls0,Used,New,Bus]), - Ls1 = union(intersection(New, Bus), Ls0), %Lock for safety - Vdb1 = use_vars(union(A#k.us, Ls1), I+1, new_vars(New, I, Vdb0)), - Ctxt = case V of - #k_binary{segs=#k_var{name=C0}} -> C0; - _ -> Ctxt0 - end, - B = match(Kb, Ls1, I+1, Ctxt, Vdb1), - #l{ke={val_clause,literal(V, Ctxt),B},i=I,vdb=use_vars(Bus, I+1, Vdb1),a=A#k.a}. - -guard_clause(#k_guard_clause{anno=A,guard=Kg,body=Kb}, Ls, I, Ctxt, Vdb0) -> - Vdb1 = use_vars(union(A#k.us, Ls), I+2, Vdb0), - Gdb = vdb_sub(I+1, I+2, Vdb1), - G = protected(Kg, I+1, Gdb), - B = match(Kb, Ls, I+2, Ctxt, Vdb1), - #l{ke={guard_clause,G,B}, - i=I,vdb=use_vars((get_kanno(Kg))#k.us, I+2, Vdb1), - a=A#k.a}. - -%% type(Ktype) -> Type. - -type(k_literal) -> literal; -type(k_int) -> integer; -%%type(k_char) -> integer; %Hhhmmm??? -type(k_float) -> float; -type(k_atom) -> atom; -type(k_nil) -> nil; -type(k_cons) -> cons; -type(k_tuple) -> tuple; -type(k_binary) -> binary; -type(k_bin_seg) -> bin_seg; -type(k_bin_int) -> bin_int; -type(k_bin_end) -> bin_end; -type(k_map) -> map. - -%% variable(Klit) -> Lit. -%% var_list([Klit]) -> [Lit]. - -variable(#k_var{name=N}) -> {var,N}. - -var_list(Ks) -> [variable(K) || K <- Ks]. - -%% atomic(Klit) -> Lit. -%% atomic_list([Klit]) -> [Lit]. - -atomic(#k_literal{val=V}) -> {literal,V}; -atomic(#k_var{name=N}) -> {var,N}; -atomic(#k_int{val=I}) -> {integer,I}; -atomic(#k_float{val=F}) -> {float,F}; -atomic(#k_atom{val=N}) -> {atom,N}; -%%atomic(#k_char{val=C}) -> {char,C}; -atomic(#k_nil{}) -> nil. - -atomic_list(Ks) -> [atomic(K) || K <- Ks]. - -%% literal(Klit) -> Lit. -%% literal_list([Klit]) -> [Lit]. - -literal(#k_var{name=N}, _) -> {var,N}; -literal(#k_literal{val=I}, _) -> {literal,I}; -literal(#k_int{val=I}, _) -> {integer,I}; -literal(#k_float{val=F}, _) -> {float,F}; -literal(#k_atom{val=N}, _) -> {atom,N}; -%%literal(#k_char{val=C}, _) -> {char,C}; -literal(#k_nil{}, _) -> nil; -literal(#k_cons{hd=H,tl=T}, Ctxt) -> - {cons,[literal(H, Ctxt),literal(T, Ctxt)]}; -literal(#k_binary{segs=V}, Ctxt) -> - {binary,literal(V, Ctxt)}; -literal(#k_bin_seg{size=S,unit=U,type=T,flags=Fs,seg=Seg,next=[]}, Ctxt) -> - %% Only occurs in patterns. - {bin_seg,Ctxt,literal(S, Ctxt),U,T,Fs,[literal(Seg, Ctxt)]}; -literal(#k_bin_seg{size=S,unit=U,type=T,flags=Fs,seg=Seg,next=N}, Ctxt) -> - {bin_seg,Ctxt,literal(S, Ctxt),U,T,Fs, - [literal(Seg, Ctxt),literal(N, Ctxt)]}; -literal(#k_bin_int{size=S,unit=U,flags=Fs,val=Int,next=N}, Ctxt) -> - %% Only occurs in patterns. - {bin_int,Ctxt,literal(S, Ctxt),U,Fs,Int, - [literal(N, Ctxt)]}; -literal(#k_bin_end{}, Ctxt) -> - {bin_end,Ctxt}; -literal(#k_tuple{es=Es}, Ctxt) -> - {tuple,literal_list(Es, Ctxt)}; -literal(#k_map{op=Op,var=Var,es=Es0}, Ctxt) -> - {map,Op,literal(Var, Ctxt),literal_list(Es0, Ctxt)}; -literal(#k_map_pair{key=K,val=V}, Ctxt) -> - {map_pair,literal(K, Ctxt),literal(V, Ctxt)}. - -literal_list(Ks, Ctxt) -> - [literal(K, Ctxt) || K <- Ks]. - - -%% is_gc_bif(Name, Arity) -> true|false -%% Determines whether the BIF Name/Arity might do a GC. - -is_gc_bif(hd, 1) -> false; -is_gc_bif(tl, 1) -> false; -is_gc_bif(self, 0) -> false; -is_gc_bif(node, 0) -> false; -is_gc_bif(node, 1) -> false; -is_gc_bif(element, 2) -> false; -is_gc_bif(get, 1) -> false; -is_gc_bif(tuple_size, 1) -> false; -is_gc_bif(Bif, Arity) -> - not (erl_internal:bool_op(Bif, Arity) orelse - erl_internal:new_type_test(Bif, Arity) orelse - erl_internal:comp_op(Bif, Arity)). - -%% Keep track of life time for variables. -%% -%% init_vars([{var,VarName}]) -> Vdb. -%% new_vars([VarName], I, Vdb) -> Vdb. -%% use_vars([VarName], I, Vdb) -> Vdb. -%% add_var(VarName, F, L, Vdb) -> Vdb. -%% -%% The list of variable names for new_vars/3 and use_vars/3 -%% must be sorted. - -init_vars(Vs) -> - vdb_new(Vs). - -new_vars([], _, Vdb) -> Vdb; -new_vars([V], I, Vdb) -> vdb_store_new(V, {V,I,I}, Vdb); -new_vars(Vs, I, Vdb) -> vdb_update_vars(Vs, Vdb, I). - -use_vars([], _, Vdb) -> - Vdb; -use_vars([V], I, Vdb) -> - case vdb_find(V, Vdb) of - {V,F,L} when I > L -> vdb_update(V, {V,F,I}, Vdb); - {V,_,_} -> Vdb; - error -> vdb_store_new(V, {V,I,I}, Vdb) - end; -use_vars(Vs, I, Vdb) -> vdb_update_vars(Vs, Vdb, I). - -add_var(V, F, L, Vdb) -> - vdb_store_new(V, {V,F,L}, Vdb). - -%% vdb - -vdb_new(Vs) -> - sort([{V,0,0} || {var,V} <- Vs]). - --type var() :: atom(). - --spec vdb_find(var(), [vdb_entry()]) -> 'error' | vdb_entry(). - -vdb_find(V, Vdb) -> - case lists:keyfind(V, 1, Vdb) of - false -> error; - Vd -> Vd - end. - -vdb_update(V, Update, [{V,_,_}|Vdb]) -> - [Update|Vdb]; -vdb_update(V, Update, [Vd|Vdb]) -> - [Vd|vdb_update(V, Update, Vdb)]. - -vdb_store_new(V, New, [{V1,_,_}=Vd|Vdb]) when V > V1 -> - [Vd|vdb_store_new(V, New, Vdb)]; -vdb_store_new(V, New, [{V1,_,_}|_]=Vdb) when V < V1 -> - [New|Vdb]; -vdb_store_new(_, New, []) -> [New]. - -vdb_update_vars([V|_]=Vs, [{V1,_,_}=Vd|Vdb], I) when V > V1 -> - [Vd|vdb_update_vars(Vs, Vdb, I)]; -vdb_update_vars([V|Vs], [{V1,_,_}|_]=Vdb, I) when V < V1 -> - %% New variable. - [{V,I,I}|vdb_update_vars(Vs, Vdb, I)]; -vdb_update_vars([V|Vs], [{_,F,L}=Vd|Vdb], I) -> - %% Existing variable. - if - I > L -> [{V,F,I}|vdb_update_vars(Vs, Vdb, I)]; - true -> [Vd|vdb_update_vars(Vs, Vdb, I)] - end; -vdb_update_vars([V|Vs], [], I) -> - %% New variable. - [{V,I,I}|vdb_update_vars(Vs, [], I)]; -vdb_update_vars([], Vdb, _) -> Vdb. - -%% vdb_sub(Min, Max, Vdb) -> Vdb. -%% Extract variables which are used before and after Min. Lock -%% variables alive after Max. - -vdb_sub(Min, Max, Vdb) -> - [ if L >= Max -> {V,F,locked}; - true -> Vd - end || {V,F,L}=Vd <- Vdb, F < Min, L >= Min ]. diff --git a/lib/compiler/src/v3_life.hrl b/lib/compiler/src/v3_life.hrl deleted file mode 100644 index 5c76312067..0000000000 --- a/lib/compiler/src/v3_life.hrl +++ /dev/null @@ -1,29 +0,0 @@ -%% -%% %CopyrightBegin% -%% -%% Copyright Ericsson AB 1999-2016. All Rights Reserved. -%% -%% Licensed under the Apache License, Version 2.0 (the "License"); -%% you may not use this file except in compliance with the License. -%% You may obtain a copy of the License at -%% -%% http://www.apache.org/licenses/LICENSE-2.0 -%% -%% Unless required by applicable law or agreed to in writing, software -%% distributed under the License is distributed on an "AS IS" BASIS, -%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -%% See the License for the specific language governing permissions and -%% limitations under the License. -%% -%% %CopyrightEnd% -%% -%% This record contains variable life-time annotation for a -%% kernel expression. Added by v3_life, used by v3_codegen. - --type vdb_entry() :: {atom(),non_neg_integer(),non_neg_integer()}. - --record(l, {ke, %Kernel expression - i=0 :: non_neg_integer(), %Op number - vdb=[] :: [vdb_entry()], %Variable database - a=[] :: [term()]}). %Core annotation - diff --git a/lib/compiler/test/compile_SUITE.erl b/lib/compiler/test/compile_SUITE.erl index 25983c6012..e88a132d59 100644 --- a/lib/compiler/test/compile_SUITE.erl +++ b/lib/compiler/test/compile_SUITE.erl @@ -375,7 +375,6 @@ do_file_listings(DataDir, PrivDir, [File|Files]) -> do_listing(Simple, TargetDir, dcbsm, ".core_bsm"), do_listing(Simple, TargetDir, dsetel, ".dsetel"), do_listing(Simple, TargetDir, dkern, ".kernel"), - do_listing(Simple, TargetDir, dlife, ".life"), do_listing(Simple, TargetDir, dcg, ".codegen"), do_listing(Simple, TargetDir, dblk, ".block"), do_listing(Simple, TargetDir, dexcept, ".except"), diff --git a/lib/compiler/test/misc_SUITE.erl b/lib/compiler/test/misc_SUITE.erl index ea4aaf40a9..b12bcbeeab 100644 --- a/lib/compiler/test/misc_SUITE.erl +++ b/lib/compiler/test/misc_SUITE.erl @@ -171,7 +171,7 @@ silly_coverage(Config) when is_list(Config) -> expect_error(fun() -> sys_core_dsetel:module(BadCoreErlang, []) end), expect_error(fun() -> v3_kernel:module(BadCoreErlang, []) end), - %% v3_life + %% v3_codegen BadKernel = {k_mdef,[],?MODULE, [{foo,0}], [], @@ -179,11 +179,7 @@ silly_coverage(Config) when is_list(Config) -> {k,[],[],[]}, f,0,[], seriously_bad_body}]}, - expect_error(fun() -> v3_life:module(BadKernel, []) end), - - %% v3_codegen - CodegenInput = {?MODULE,[{foo,0}],[],[{function,foo,0,[a|b],a,b,[]}]}, - expect_error(fun() -> v3_codegen:module(CodegenInput, []) end), + expect_error(fun() -> v3_codegen:module(BadKernel, []) end), %% beam_a BeamAInput = {?MODULE,[{foo,0}],[], diff --git a/lib/inets/src/http_client/httpc_handler.erl b/lib/inets/src/http_client/httpc_handler.erl index bd1d2e833a..6907bf5262 100644 --- a/lib/inets/src/http_client/httpc_handler.erl +++ b/lib/inets/src/http_client/httpc_handler.erl @@ -736,7 +736,7 @@ maybe_send_answer(Request, Answer, State) -> answer_request(Request, Answer, State). deliver_answer(#request{from = From} = Request) - when is_pid(From) -> + when From =/= answer_sent -> Response = httpc_response:error(Request, socket_closed_remotely), httpc_response:send(From, Response); deliver_answer(_Request) -> diff --git a/lib/inets/test/httpc_SUITE.erl b/lib/inets/test/httpc_SUITE.erl index 5dfb1474e5..a39e786c79 100644 --- a/lib/inets/test/httpc_SUITE.erl +++ b/lib/inets/test/httpc_SUITE.erl @@ -130,7 +130,8 @@ only_simulated() -> port_in_host_header, redirect_port_in_host_header, relaxed, - multipart_chunks + multipart_chunks, + stream_fun_server_close ]. misc() -> @@ -745,7 +746,7 @@ empty_body() -> empty_body(Config) when is_list(Config) -> URL = url(group_name(Config), "/empty.html", Config), {ok, {{_,200,_}, [_ | _], []}} = - httpc:request(get, {URL, []}, [{timeout, 500}], []). + httpc:request(get, {URL, []}, [], []). %%------------------------------------------------------------------------- @@ -1178,6 +1179,22 @@ wait_for_whole_response(Config) when is_list(Config) -> ReqSeqNumServer ! shutdown. %%-------------------------------------------------------------------- +stream_fun_server_close() -> + [{doc, "Test that an error msg is received when using a receiver fun as stream target"}]. +stream_fun_server_close(Config) when is_list(Config) -> + Request = {url(group_name(Config), "/delay_close.html", Config), []}, + Self = self(), + Fun = fun(X) -> Self ! X end, + {ok, RequestId} = httpc:request(get, Request, [], [{sync, false}, {receiver, Fun}]), + receive + {RequestId, {error, Reason}} -> + ct:pal("Close ~p", [Reason]), + ok + after 13000 -> + ct:fail(did_not_receive_close) + end. + +%%-------------------------------------------------------------------- %% Internal Functions ------------------------------------------------ %%-------------------------------------------------------------------- stream(ReceiverPid, Receiver, Config) -> @@ -2029,6 +2046,9 @@ handle_uri(_,"/multipart_chunks.html",_,_,Socket,_) -> send(Socket, Head), send_multipart_chunks(Socket), http_chunk:encode_last(); +handle_uri(_,"/delay_close.html",_,_,Socket,_) -> + ct:sleep(10000), + close(Socket); handle_uri("HEAD",_,_,_,_,_) -> "HTTP/1.1 200 ok\r\n" ++ "Content-Length:0\r\n\r\n"; diff --git a/lib/public_key/test/public_key_SUITE.erl b/lib/public_key/test/public_key_SUITE.erl index 579df160bc..38e8f30a25 100644 --- a/lib/public_key/test/public_key_SUITE.erl +++ b/lib/public_key/test/public_key_SUITE.erl @@ -97,14 +97,27 @@ end_per_group(_GroupName, Config) -> Config. %%------------------------------------------------------------------- -init_per_testcase(Case, Config) when Case == pkix_test_data_all_default; - Case == gen_ec_param -> +init_per_testcase(pkix_test_data_all_default, Config) -> case crypto:ec_curves() of [] -> {skip, missing_ecc_support}; _ -> - init_common_per_testcase(Config) + init_common_per_testcase(Config) end; + +init_per_testcase(gen_ec_param, Config) -> + case crypto:ec_curves() of + [] -> + {skip, missing_ecc_support}; + Curves -> + case lists:member(secp521r1, Curves) of + true -> + init_common_per_testcase(Config); + false -> + {skip, missing_ecc_secp52r1_support} + end + end; + init_per_testcase(TestCase, Config) -> case TestCase of ssh_hostkey_fingerprint_md5_implicit -> init_fingerprint_testcase([md5], Config); diff --git a/system/doc/oam/oam_intro.xml b/system/doc/oam/oam_intro.xml index d3867f03ca..ead8c026b9 100644 --- a/system/doc/oam/oam_intro.xml +++ b/system/doc/oam/oam_intro.xml @@ -211,7 +211,7 @@ snmp:c("MY-MIB", [{il, ["sasl/priv/mibs"]}]).</code> <p>The following MIBs are defined in the OTP system:</p> <list type="bulleted"> - <item><p><c>OTP-REG)</c> (in SASL) contains the top-level + <item><p><c>OTP-REG</c> (in SASL) contains the top-level OTP registration objects, used by all other MIBs.</p></item> <item><p><c>OTP-TC</c> (in SASL) contains the general Textual Conventions, which can be used by any other MIB.</p></item> |
