[libc] fix -Wconversion #77384
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[libc] fix -Wconversion #77384
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Fixes the following from GCC:
llvm-project/libc/src/string/memory_utils/op_x86.h:236:24: error:
conversion from ‘long unsigned int’ to ‘uint32_t’ {aka ‘unsigned int’} may
change value [-Werror=conversion]
236 | return (xored >> 32) | (xored & 0xFFFFFFFF);
| ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Link: https://lab.llvm.org/buildbot/#/builders/250/builds/16236/steps/8/logs/stdio
Link: llvm#74506
|
@llvm/pr-subscribers-libc Author: Nick Desaulniers (nickdesaulniers) ChangesFixes the following from GCC: Link: https://lab.llvm.org/buildbot/#/builders/250/builds/16236/steps/8/logs/stdio Full diff: https://github.com/llvm/llvm-project/pull/77384.diff 1 Files Affected:
diff --git a/libc/src/string/memory_utils/op_x86.h b/libc/src/string/memory_utils/op_x86.h
index 1a20659c178cd1..3d2eb13fa302ad 100644
--- a/libc/src/string/memory_utils/op_x86.h
+++ b/libc/src/string/memory_utils/op_x86.h
@@ -233,7 +233,8 @@ template <> LIBC_INLINE uint32_t neq<__m512i>(CPtr p1, CPtr p2, size_t offset) {
const auto a = load<__m512i>(p1, offset);
const auto b = load<__m512i>(p2, offset);
const uint64_t xored = _mm512_cmpneq_epi8_mask(a, b);
- return (xored >> 32) | (xored & 0xFFFFFFFF);
+ return static_cast<uint32_t>(xored >> 32) |
+ static_cast<uint32_t>(xored & 0xFFFFFFFF));
}
template <>
LIBC_INLINE MemcmpReturnType cmp_neq<__m512i>(CPtr p1, CPtr p2, size_t offset) {
|
lntue
approved these changes
Jan 8, 2024
michaelrj-google
approved these changes
Jan 8, 2024
nickdesaulniers
commented
Jan 9, 2024
| const uint64_t xored = _mm512_cmpneq_epi8_mask(a, b); | ||
| return (xored >> 32) | (xored & 0xFFFFFFFF); | ||
| return static_cast<uint32_t>(xored >> 32) | | ||
| static_cast<uint32_t>(xored & 0xFFFFFFFF)); |
nickdesaulniers
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justinfargnoli
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Fixes the following from GCC:
llvm-project/libc/src/string/memory_utils/op_x86.h:236:24: error:
conversion from ‘long unsigned int’ to ‘uint32_t’ {aka ‘unsigned int’}
may
change value [-Werror=conversion]
236 | return (xored >> 32) | (xored & 0xFFFFFFFF);
| ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Link:
https://lab.llvm.org/buildbot/#/builders/250/builds/16236/steps/8/logs/stdio
Link: llvm#74506
justinfargnoli
pushed a commit
to justinfargnoli/llvm-project
that referenced
this pull request
Jan 28, 2024
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Fixes the following from GCC:
Link: https://lab.llvm.org/buildbot/#/builders/250/builds/16236/steps/8/logs/stdio
Link: #74506