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Because of a copy-and-paste error in erlc.c, the -MP flag had the same
effect as -MG. As a workaround, you had to pass +makedep_phony to enable
the MP option. This patch makes -MP work as intended.
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Use a gb_set instead of an ordset to store the set of defined
functions in the module to avoid quadritic time complexity.
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With L1, L2, C1, C2 integers such as L1 < L2 and C1 < C2, locations
are ordered like this:
L1 < {L1, C1} < {L1, C2} < L2
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OTP-10106
OTP-10107
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There was a colon missing after the column number, it must be an error
as it's not missing in list_errors/2.
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If set, compile will call epp with a full location {1, 1} instead of 1,
thus making it keep the column numbers in the parsed AST.
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This commit adds a source option to compile:forms() that
sets the source value returned by module_info(compile).
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* bjorn/compiler/coverage-and-minor-fixes/OTP-9982:
v3_life: Use common code for guards and bodies
v3_core: Don't put negative line numbers in annotations
v3_kernel: Dig out the line number only when generating a warning
v3_kernel: Clean up handling of guards
v3_kernel: Introduce is_in_guard/1
v3_kernel: Removed unreached clause for #k_bin_int{} in sub_size_var/1
v3_kernel: Remove unreached handling of #k_bin_int{} in arg_con/1
v3_codegen: Eliminate the special case of 'put' without destination
v3_kernel: Don't attempt to share identical literals
v3_kernel: Handle sequences in guards
v3_kernel: Remove clauses that are never executed in arg_val/1
v3_kernel.hrl: Remove unused record #k_string{}
v3_kernel.erl: Remove unused define of EXPENSIVE_BINARY_LIMIT
sys_core_fold: Refactor previous_ctx_to_binary/2 to cover it completely
sys_core_fold: Fix opt_guard_try/1
sys_core_fold: Simplify opt_bool_not() to cover it completely
sys_core_fold: Remove duplicate optimization
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In Core Erlang and later passes, compiler-generated code can be
indicated in two different ways: by negative line numbers and by
a 'compiler_generated' annotation.
Simplify the code and improve coverage by turning negative line
numbers positive and adding a 'compiler_generated' annotation in
the v3_core pass. That means that Core Erlang and latter passes
do not have deal with negative line numbers.
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Handling of guards become a mess when andalso/orelse in guards
were introduced. Clean it up by using common code for most
constructs, regardless of where they occur, and when needed use
is_in_guard/1 to handle guard constructs differently.
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* ks/compile_info-fix:
compiler: Fix discrepancy in compile_info
OTP-9917
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The BEAM disassembler used the atom 'none' to signify the absence
of a compile_info chunk in a .beam file. This clashes with the type
declaration of the compile_info field of a #beam_file{} record as
containing a list. Use [] to signify the absence of this chunk.
This simplifies the code and avoids a dialyzer warning.
For fixing a similar problem and for consistency, changed also the
return type of the attributes field of the #beam_file{} record.
This required a change in the beam_disasm test suite.
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* bjorn/compiler/inline-and-on_load/OTP-9910:
compiler: Teach the inliner to preserve on_load functions
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The inliner was ignorant of on_load functions and would discard them
(unless they were exported or referenced).
Noticed-by: Yiannis Tsiouris <[email protected]>
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Compiling the same source code with the same options may not produce
the same BEAM file because the compilation time is included in the
"CInf" chunk.
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In the following code excerpt, the instruction marked below was
incorrectly removed:
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{'try',{y,2},{f,TryCaseLabel}}.
{bif,get,{f,0},[{x,0}],{x,0}}.
{move,{x,1},{y,0}}.
{move,{x,3},{y,1}}. <======= Incorrectly removed
{jump,{f,TryEndLabel}}.
{label,TryEndLabel}.
{try_end,{y,2}}.
{deallocate,3}.
return.
{label,TryCaseLabel}.
{try_case,{y,2}}.
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beam_utils indicated that {y,1} was not used at TryEndLabel,
which by itself is correct. But it is still not safe to remove
the instruction, because {y,1} might be used at TryCaseLabel
if an exception occurs.
Noticed-by: Eric Merritt
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The size field of a #k_bin_int{} is always a literal integer
(#k_int{}); thus there is no way this clause can match.
While we are at it, remove a duplicated call to
select_assert_match_possible/3 in select_bin_int/1.
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arg_con/1 will never be called with #k_bin_int{} argument, since
a #k_bin_int{} is constructed out of #k_bin_seg{} only after
arg_con/1 has been called with a #k_bin_seg{} argument.
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If we let v3_kernel make sure that a 'put' operation always has a
destination register, the special case in v3_codegen is not needed.
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It is unlikely that sharing literals will actually save any time.
Literals that can be shared are usually small. It is more likely
that maintaining the dictionary of literals will waste time.
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A guard with a sequence will cause a crash in v3_codegen. Currently,
it seems that a sequence in a guard will never happen when compiling
from Erlang code, but there are several reasons to fix this problem
anyway:
* There are other compilers that generate Core Erlang code.
* Changes to sys_core_fold (perhaps additional optimizations) may
cause sequences to be generated in guards.
* A previously uncovered line in sys_core_fold:opt_guard_try/1 will
now be covered.
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arg_val/1 will never be called for single-valued types, so there
is no need handle these types.
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opt_guard_try/1 assumed that it was only operating on guards, and
implicitly assumed that any function call was to BIFs without
any side effects.
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In:
case not Expr of ...
we don't have the information to ascertain that Expr is a boolean
expression. Therefore, add the catch-all clause unconditionally.
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The second clause in opt_case_in_let_2/3 attempts to do the same
optimization as opt_bool_case_redundant/1; it will never succeed.
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Modules would not get excluded. While at it, no longer exclude
sys_pre_attributes since we will want to test it.
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Also correct the comment in bsm_ensure_no_partition_2/5, and while at
it correct typos in the comment for bsm_nonempty/2.
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We need to write a test case in Core Erlang in order to cover
make_effect_seq/2, since v3_core does not generate "deep" Core Erlang
code.
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On my Mac Pro with 8 cores, this change make self_compile/1 more
than twice as fast, and self_compile_old_inliner/1 more than 4 times
faster.
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In the self compilation test cases, the compiler compiles itself
and runs the newly compiled version on a slave node. Having the
cover server starting on the slave node defeats the purpose of
the test, since it will load the SAME cover-compiled code on the
slave node. (It will also be slower, but will not improve coverage
since it compiles the same source files again.)
Use a shielded node to prevent the cover server from getting
started on the slave node.
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