[llvm-bugs] [Bug 18888] Cannot select: intrinsic %llvm.x86.sse42.crc32.32.8
via llvm-bugs
llvm-bugs at lists.llvm.org
Fri Sep 15 13:42:15 PDT 2017
https://bugs.llvm.org/show_bug.cgi?id=18888
Craig Topper <craig.topper at gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |craig.topper at gmail.com
Resolution|--- |INVALID
Status|NEW |RESOLVED
--- Comment #4 from Craig Topper <craig.topper at gmail.com> ---
Resolving as invalid. This looks to have been compiled without enabling support
CRC32 feature either through -march or -mcrc32. We generally tell people not
use the builtin directly and instead to use the intrinsic in x86intrin.h
At the time this was filed using the intrinsic should have given a compile
error that the intrinsic wouldn't be defined without enabling crc32. Current
version of clang should detect the missing feature support on the builtin even
without using the intrinsic.
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