[LLVMbugs] [Bug 13000] New: LLVM ERROR: Cannot select: intrinsic %llvm.x86.ssse3.pmadd.ub.sw.128 on AMD CPU (Firefox LTO build)

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=13000

             Bug #: 13000
           Summary: LLVM ERROR: Cannot select: intrinsic
                    %llvm.x86.ssse3.pmadd.ub.sw.128 on AMD CPU (Firefox
                    LTO build)
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: markus at trippelsdorf.de
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


During the final libxul link of an Firefox LTO build I get:

LLVM ERROR: Cannot select: intrinsic %llvm.x86.ssse3.pmadd.ub.sw.128

This happens on an AMD Phenom II CPU that doesn't support ssse3.
I'm using -march=native in the CXXFLAGS (-target-cpu amdfam10).
A non-LTO build is fine.

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