[all-commits] [llvm/llvm-project] 0a77e6: [libcxx] Add flag to disable __builtin_assume in _...
aeubanks via All-commits
all-commits at lists.llvm.org
Thu Apr 7 09:03:29 PDT 2022
Branch: refs/heads/main
Home: https://github.com/llvm/llvm-project
Commit: 0a77e633226b5598e426603c03e54d62ed275670
https://github.com/llvm/llvm-project/commit/0a77e633226b5598e426603c03e54d62ed275670
Author: Arthur Eubanks <aeubanks at google.com>
Date: 2022-04-07 (Thu, 07 Apr 2022)
Changed paths:
M libcxx/include/__assert
M libcxx/test/libcxx/assertions/single_expression.sh.cpp
Log Message:
-----------
[libcxx] Add flag to disable __builtin_assume in _LIBCPP_ASSERT
Introduce _LIBCPP_ASSERTIONS_DISABLE_ASSUME which makes _LIBCPP_ASSERT
not call __builtin_assume when _LIBCPP_ENABLE_ASSERTIONS == 0.
Calling __builtin_assume was introduced in D122397.
__builtin_assume is generally supposed to improve optimizations, but can
cause regressions when LLVM has trouble handling the calls to
`llvm.assume()` (see comments in D122397).
Reviewed By: philnik
Differential Revision: https://reviews.llvm.org/D123175
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