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Slightly optimize updating of maps
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bjorng/bjorn/compiler/improve-case-opt/ERL-452/OTP-14525
Generalize optimization of "one-armed" cases
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Run the sharing optimisation in beam_jump until fixpoint
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The instruction put_map_assoc/5 (used for updating a map) has a
failure operand, but it can't actually fail provided that its "map"
argument is a map.
The following code:
M#{key=>value}.
will be compiled to:
{test,is_map,{f,3},[{x,0}]}.
{line,[...]}.
{put_map_assoc,{f,0},{x,0},{x,0},1,{list,[{atom,key},{atom,value}]}}.
return.
{label,3}.
%% Code that produces a 'badmap' exception follows.
Because of the is_map instruction, {x,0} always contains a map when
the put_map_assoc instruction is executed. Therefore we can remove
the failure operand. That will save one word, and also eliminate
two tests at run-time.
The only problem is that the compiler in OTP 17 did not emit a
is_map instruction before the put_map_assoc instruction. Therefore,
we must add an instruction that tests for a map if the code was
compiled with the OTP 17 compiler.
Unfortunately, there is no safe and relatively easy way to known that
the OTP 17 compiler was used, so we will check whether a compiler
before OTP 20 was used. OTP 20 introduced a new chunk type for atoms,
which is trivial to check.
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angelhof/public_key/generate_key-rsa-inconsistency-fix
public_key:generate_key/1 RSA key generation inconsistency
OTP-14534
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* rickard/non-smp-removal-cleanup/OTP-14518:
erts: Cleanup erl and erlang docs after non-smp removal
erts: Remove unused prototypes after non-smp removal
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Even though, it's not possible to have fall-throughs when entering the otp
pass, it can produce them itself and we're running the pass until fixpoint.
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This makes other optimisations more efficient since we have less labels overall.
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It can happen we have the following situation:
{test,is_tuple,Fail,[R1]}
{test,test_arity,Fail,[R1,N1]}
{get_tuple_element,R1,N2,R2}
{test,is_eq_exaqct,Fail,[R2,Atom]}
{jump,Fail}
Previously, the optimisation would eliminate the last is_eq_exact test, but
we can do more. If the register R2 is not used in Fail, we can eliminate the
get_tuple_element instruction as well as all the preceding tests. Ultimately,
the whole sequence can be replaced by:
{jump,Fail}
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* ingela/ssl/timeout-cuddle:
ssl: Longer timeouts for test cases that do many handshakes
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* bjorn/erts/beam-ops:
Make '0 bsl BigNumber' consistently succeed
Break out most instructions from beam_emu.c
beam_makeops: Pretty-print the generated code
beam_makeops: Define ARCH_32 and ARCH_64
Introduce micro instructions
Simplify specifying implementation of instructions
OTP-14532
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Correct arity an function names for compiler deprecation warnings
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This is especially useful after inlining a function with a case.
Today the compiler would most probably be able to unify all the leafs of the
case during the sharing optimisation, but it would fail to unify the pattern
matching itself.
Naively running the optimisation multiple times wouldn't be able to find the
common code either, because it would differ in jump/fail targets of various
instructions.
To remedy this, after doing each sharing pass we traverse the code backwards
when reversing and update all the jump targets with the new targets that were
discovered during the unification pass. This allows running the optimisation
until fixpoint and makes sure all sharing opportunities will be discovered.
This optimisation also helps with the Elixir's `with/else` construct.
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HTTP server truncates existing logs
OTP-14530
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'0 bsl 134217728' would fail with a system limit exception on a 32-bit
BEAM machine, but not on a 64-bit BEAM machine. Smaller values
on the right would always work.
Make erlang:bsl(0, BigNumber) always return 0 to make for consistency.
(The previous commit accidentally did that change for
'0 bsl BigNumber'.)
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* ingela/ssl/cert-handling:
ssl: Correct cipher suite handling
ssl: Modernize DSA cert chain generation
ssl: Clean
ssl: Remove test of OpenSSL
ssl: Use new cert generation
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* maint:
sys_core_fold: Fix unsafe optimization of non-variable apply
Correct type specification in ssl:prf/5
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sys_core_fold: Fix unsafe optimization of non-variable apply
OTP-14526
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A 'case' expression will force a stack frame (essentially in the same
way as a function call), unless it is at the end of a function.
In sys_core_fold there is an optimization that can optimize one-armed
cases such as:
case Expr of
Pat1 ->
DoSomething;
Pat2 ->
erlang:error(bad)
end,
MoreCode.
Because only one arm of the 'case' can succeed, the code after the
case can be move into the successful arm:
case Expr of
Pat1 ->
DoSomething,
MoreCode;
Pat2 ->
erlang:error(bad)
end.
Thus, the 'case' is at the end of the function and it will no longer
need a stack frame.
However, the optimization in sys_core_fold would not be applied if
there were more than one failing clause such as in this code:
case Expr of
Pat1 ->
DoSomething,
MoreCode;
Pat2 ->
erlang:error(bad);
_ ->
erlang:error(case_clause)
end.
Generalize the optimization to handle any number of failing
clauses at the end of the case.
Reported-by: bugs.erlang.org/browse/ERL-452
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Correct type specification in ssl:prf/5
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* ingela/dtls/cuddle:
ssl: Handle OpenSSL output correctly
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This is mainly fixing the test suites so that they test the intended cipher
suites, issue reported in ERL-460.
Also ssl_cipher:anonymous_suites was corrected for DTLS.
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* anders/diameter/message_cb/OTP-14486:
Add simple message_cb to example server
Fix inappropriate message callbacks
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* anders/diameter/20.0/shared_transport/OTP-14011:
Don't assume nodes are eternally connected when sharing transport
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* anders/diameter/transport/ERL-332:
Remove irrelevant comment
Add missing setopts after deferred diameter_{tcp,sctp} actions
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Adjust to handle output from OpenSSL in a more general way, so that
"unknown option" should be caught for all cases and the test case
skipped if that is the case and other data form OpenSSL should be
ignored.
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This code was not used and we already have mixed chains ECDH_RSA tests
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We are not testing OpenSSL. We want to test interoperability with OpenSSL
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beam_makeops will place all micro instructions in a block and generate
goto instructions from one micro instruction to the next. It will also
add adjustments of 'I' if necessary (if the micro instructions have
different length).
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Eliminate the need to write pre-processor macros for each instruction.
Instead allow the implementation of instruction to be written in
C directly in the .tab files. Rewrite all existing macros in this
way and remove the %macro directive.
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The sys_core_fold pass would do an unsafe "optimization" when an
apply operation did not have a variable in the function position
as in the following example:
> cat test1.core
module 'test1' ['test1'/2]
attributes []
'i'/1 =
fun (_f) -> _f
'test1'/2 =
fun (_f, _x) ->
apply apply 'i'/1 (_f) (_x)
end
> erlc test1.core
no_file: Warning: invalid function call
Reported-by: Mikael Pettersson
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