https://bugs.llvm.org/show_bug.cgi?id=33480
Bug ID: 33480
Summary: __ARM_FEATURE_CRC32 is not defined for armv8.1-a
Product: clang
Version: 4.0
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Frontend
Assignee: unassignedclangb...@nondot.org
Reporter: yyc1...@gmail.com
CC: llvm-bugs@lists.llvm.org
crc32c is a required feature on armv8.1-a but when clang is passed
`-march=armv8.1-a`, it does not define the `__ARM_FEATURE_CRC32` which is used
to check if crc32c extension is available.
GCC does define it in this case.
Tested with `{gcc,clang} -march=armv8.1-a -dM - -E < /dev/null | grep -i crc`.
There might be other 8.1/8.2 features that has this issue too.
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