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Make sure that we recognize map literals at load time, as we
do for lists and tuples. Also use maps:from_list/1 to build
a new map instead of building it up from scratch inserting one
key/value pair at the time.
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The pattern in the generator for a list or binary comprehension
was processed as an expression instead of as a pattern. That
happened to work because expressions and patterns were translated
in the same way.
In the future we might want to process expressions and patterns
differently.
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t_frequency_table/1 would take about 40 seconds on my computer.
Scale down the number of iterations 100 times to speed it up.
The large number of iterations does not find any more bugs in
the debugger.
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* hb/line_abstraction/OTP-12195: (21 commits)
Ensure that erl_anno is used when building the primary bootstrap
erl_docgen: Use module erl_anno
wx: Use module erl_anno
diameter: Use module erl_anno
dialyzer: Use module erl_anno
eunit: Use module erl_anno
hipe: Use module erl_anno
edoc: Use module erl_anno
syntax_tools: Use module erl_anno
test_server: Use module erl_anno
tools: Use module erl_anno
parsetools: Use module erl_anno
kernel: Use module erl_anno
asn1: Use module erl_anno
debugger: Use module erl_anno
stdlib: Silence some of qlc's warnings
stdlib: Use module erl_anno
compiler: Use module erl_anno
emulator: Use module erl_anno
Update primary bootstrap
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As the erl_anno module is used by the compiler, it must be included
in the set of modules that are used when building the primary
bootstrap.
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As long as the Erlang Compiler and qlc do not agree on the location of
LC warnings, qlc's own warnings about patterns and filters that always
fail have been silenced.
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Introduce erl_anno, an abstraction of the second element of tokens and
tuples in the abstract format. The convention that negative line
numbers can be used for silencing compiler warnings will no longer
work in OTP 19; instead the annotation 'generated' is to be used.
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OTP-12693
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* mikpe/hipe-unbreak-arity-4-bifs:
erts/hipe: unbreak arity 4 BIFs
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* x0id/jinterface_generic_match:
jinterface: match/bind added to OtpErlangObject
fix typo error from recent merge
OTP-12691
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* erland/OTP18/snmp/time/OTP-12452:
snmp: Remove deprecated warning for erlang:now in snmpc
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* bjorn/compiler/misc:
test_lib: Simplify uniq/0
beam_dict: Correct comparison in opcode/2
beam_utils: Re-use the local helper function drop_labels/1
beam_asm: Speed up encoding of large numbers
compilation_SUITE: Speed up the self_compile test cases
beam_listing: Optimize writing of .S files
v3_core, v3_codegen: Eliminate old-style catches
cerl_inline: Replace old-style 'catch' with 'try'...'catch'
sys_core_fold: Suppress warnings better
beam_utils: Teach check_liveness/3 to understand get_map_elements
Teach beam_trim to handle map instructions
beam_utils: Be less conservative about liveness for exit instructions
beam_validator: Stop validating the 'aligned' flag for binaries
beam_validator: Clean up updating of types for y register
beam_validator: Remove support for removed BIF fault/1,2
beam_validator: Correct merging of states
beam_validator: Correct merging of y registers
sys_pre_expand: Remove unused fields in #expand{} record
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Simplify the uniq/0 function by using erlang:unique_integer/1.
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The intention of the comparison is to avoid unnecessary updates of the
">=" instead of ">". With the ">" comparison, typically every line
instruction would cause the #asm{} record to be updated.
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In 8470558, the drop_labels/1 function was added to beam_utils
as a minor optimization. Since the function is already available,
we might as well use it in index_label/3 too.
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The misc_SUITE:integer_encoding/1 test case is annoyingly slow.
Rewrite the encoding of integers in beam_asm to use the
binary:encode_unsigned/1 BIF.
Also tweak the test case itself. Scale the down the maximum
size of the numbers being generated, but also add test of
numbers around boundaries of power of two (which are the numbers
most likely to expose bugs in the encoding).
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It is not necessary to compile the compile three times. After the
second compilation, we compare the generated .beam files with the
.beam files that were used when compiling them. Doing one more
round will not find more bugs.
While we are it, remove the ?line macros and the unused make_current/1
function.
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The test suites generates listing files, so we can slightly speed
up running of test suites (especially when running 'cover') by
optimizing writing of .S files.
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Using 'try'...'catch' simplifies the code and improves coverage
because we don't have to re-throw accidentally caught errors.
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86fbd6d76d strengthened type optimization in lets. As a result of
the stronger optimizations, special care had to be taken to
suppress false warnings.
It turns out that false warnings can still slip through. Slapping
on a 'compiler_generated' annotation at the top-level of a
complex term such as #c_tuple{} may not suppress all warnings.
We will need to go deeper into the term to eliminate all warnings.
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Understanding get_map_elements improves the stack trimming done
by beam_trim.
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beam_utils used to be overly conservative about liveness for
exit instructions such as:
call_ext erlang:exit/1
beam_utils would consider all y registers to be used, to avoid
overwriting a catch or try tag. That does not seem to be a real
risk.
However, we miss opportunities for stack trimming if we consider
y registers used by an exit instruction.
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The run-time system stopped paying attention the 'aligned' flag in bit
syntax construction and matching when bitstrings were introduced in
language.
The beam_asm compiler pass will crash if the 'aligned' flag is given
in bit syntax instructions.
beam_validator still validates the 'aligned' flag. Before
912fea0b712a (which removed the possibility to validate existing
BEAM files), the 'aligned' flag could actually be encountered
when validating a BEAM file.
Since the validation of 'aligned' no longer serves any useful
purpose, remove the validation code.
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set_type_y/3 is far too complicated. Note that we don't need to check
the #st.numy field, because we will detect the error anyway because
the information for the y register will be missing in the #st.y
gb_tree.
There is also a clause that would never match because of a spelling
error (the first "n" was missing in "uninitialized"). That clause
is not needed because the default clause will do fine.
Furthermore, we can break out the special case for handling catch_end
and similar instructions into a new function.
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* egil/opt-instructions/OTP-12690:
erts: Specialize minus and plus instruction
erts: Add move2 specialization for common move patterns
erts: Specialize rem instruction for common case
erts: Specialize band instruction for common case
erts: Batch loads and stores for move_window
erts: Fix loader increment from minus instruction
erts: Add move window instruction
erts: Add instruction move3 for xy and xx
erts: Specialize compare instructions
kernel: Add instruction_count helper to erts_debug
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* erland/OTP18/snmp/OTP-12452:
snmp: Remove deprecated warning for erlang:now in snmp_verbority
snmp: Change to random use crypto. Remove use of erlang:now
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