[LLVMbugs] [Bug 16721] --march=native misidentification

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Sun Jul 28 09:23:33 PDT 2013


elena-v2 <elena.v.miles at gmail.com> changed:

           What    |Removed                     |Added
             Status|RESOLVED                    |REOPENED
         Resolution|INVALID                     |---

--- Comment #3 from elena-v2 <elena.v.miles at gmail.com> ---
Let me correct myself then, since I've been gotcha'd: your compiler is wrong
about what my chip can do.

I did some more poking around, and code fails horribly with illegal instruction
calls on -march=native and -march=penryn, but setting -mno-sse4.2 fixes the
issue. So it seems like -march=penryn is wrongly set to believe that sse4.2

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