craig.topper added inline comments.
================
Comment at: clang/lib/Basic/Targets/X86.cpp:564
+ if (HasLAHFSAHF)
+ Builder.defineMacro("__LAHF_SAHF__");
if (HasLZCNT)
----------------
craig.topper wrote:
> It looks like gcc may define this always in 32-bit mode?
More confusingly, they define it in 32-bit mode unless -mno-sahf is on the
command line. Despite 32-bit mode always having LAHF/SAHF instructions.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D89198/new/
https://reviews.llvm.org/D89198
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