[llvm-bugs] [Bug 27003] New: Illegal instruction when building with -march=skylake

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=27003

            Bug ID: 27003
           Summary: Illegal instruction when building with -march=skylake
           Product: clang
           Version: 3.8
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: krejzi at email.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

When building any autoconf based package with CC="clang -march=skylake" set, it
fails to configure. The problem is that test program produced by configure
crashes with "Illegal instruction".

I have attached generated assembly with -march=broadwell and -march=skylake.
-march=broadwell works fine.

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