[LLVMbugs] [Bug 11662] New: vector select with i8s seems to be broken

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=11662

             Bug #: 11662
           Summary: vector select with i8s seems to be broken
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: matt at pharr.org
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Created attachment 7809
  --> http://llvm.org/bugs/attachment.cgi?id=7809
bitcode

See the attached test case, which does a vector select with compile-time
constant values for all operands.  It should produce the result <100, 2, 100,
4, 100, 6, 100 8>, and does so if the select operands are i16, i32, or i64
types.  However, if it is a vector of i8s, then the result returned is <100,
100, 100, 100, 100, 100, 100, 100>


% llc bug.ll -o bug.s && clang bug.s bug.cpp && ./a.out
0: x8 = 100.0    x16 = 100.0    x32 = 100.0    x64 = 100.0
1: x8 = 100.0    x16 = 2.0    x32 = 2.0    x64 = 2.0
2: x8 = 100.0    x16 = 100.0    x32 = 100.0    x64 = 100.0
3: x8 = 100.0    x16 = 4.0    x32 = 4.0    x64 = 4.0
4: x8 = 100.0    x16 = 100.0    x32 = 100.0    x64 = 100.0
5: x8 = 100.0    x16 = 6.0    x32 = 6.0    x64 = 6.0
6: x8 = 100.0    x16 = 100.0    x32 = 100.0    x64 = 100.0
7: x8 = 100.0    x16 = 8.0    x32 = 8.0    x64 = 8.0
%

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