[LLVMbugs] [Bug 1427] NEW: MMX maskmovq is not properly selected.

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=1427

           Summary: MMX maskmovq is not properly selected.
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Backend: X86
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: asl at math.spbu.ru


Consider attached testcase. We have:

Cannot yet select: 0x878fe20: v4i16 = vector_shuffle 0x878fb90, 0x878fd28, 0x878fda0
./llc((anonymous namespace)::PrintStackTrace()+0x1f)[0x866467f]
/lib/libc.so.6(abort+0xec)[0xb7c9bc0c]
./llc((anonymous
namespace)::X86DAGToDAGISel::Select_ISD_VECTOR_SHUFFLE_v4i16(llvm::SDOperand
const&)+0x436)[0x8385016]

This breaks Qt 4.3.0rc1



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