[llvm-bugs] [Bug 36068] New: [PowerPC] VSX splat instruction bug (xxspltw)

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=36068

            Bug ID: 36068
           Summary: [PowerPC] VSX splat instruction bug (xxspltw)
           Product: new-bugs
           Version: trunk
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: mleone at wetafx.co.nz
                CC: llvm-bugs at lists.llvm.org

Created attachment 19735
  --> https://bugs.llvm.org/attachment.cgi?id=19735&action=edit
Test case

It looks like the PowerPC VSX splat instruction (xxspltw) sometimes writes to
the wrong register.  To reproduce, compile the two attached files into an
executable, with optimization enabled (clang++ -O2 Floats.cc testFloats.cc -o
testFloats).  The bug causes it to incorrectly return a non-zero status.  If
you compare the assembly to gcc (with -O3), they are identical except for the
xxspltw output operand.

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