[LLVMbugs] [Bug 10451] New: [AVX] another bitcast / 'cannot select' error

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=10451

           Summary: [AVX] another bitcast / 'cannot select' error
           Product: new-bugs
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: matt at pharr.org
                CC: llvmbugs at cs.uiuc.edu


With the following input, if I run the following with top-of-tree (i.e.
including the recent fix for bug 10440), I get the following error.

declare <8 x float> @llvm.x86.avx.maskload.ps.256(i8*, <8 x float>) nounwind
readonly

declare void @llvm.x86.avx.maskstore.ps.256(i8*, <8 x float>, <8 x float>)
nounwind

define void @f_f([0 x float]* %RET, [0 x float]* %aFOO) nounwind {
allocas:
  %base2i8 = bitcast [0 x float]* %aFOO to i8*
  %floatval.i = tail call <8 x float> @llvm.x86.avx.maskload.ps.256(i8*
%base2i8, <8 x float> <float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000,
float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000,
float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000>)
nounwind
  %binop = fadd <8 x float> %floatval.i, %floatval.i
  %ptr.i = bitcast [0 x float]* %RET to i8*
  tail call void @llvm.x86.avx.maskstore.ps.256(i8* %ptr.i, <8 x float> <float
0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float
0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float
0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000>, <8 x float> %binop) nounwind
  ret void
}


% llc bug.ll -o - -mcpu=corei7-avx -mattr=+avx  
    .section    __TEXT,__text,regular,pure_instructions
LLVM ERROR: Cannot select: 0x7f8b51834d10: v8f32 = bitcast 0x7f8b51834c10
[ID=10]
  0x7f8b51834c10: v8i32 = BUILD_VECTOR 0x7f8b51834b10, 0x7f8b51834b10,
0x7f8b51834b10, 0x7f8b51834b10, 0x7f8b51834b10, 0x7f8b51834b10, 0x7f8b51834b10,
0x7f8b51834b10 [ID=9]
    0x7f8b51834b10: i32 = TargetConstant<-1> [ID=6]
    0x7f8b51834b10: i32 = TargetConstant<-1> [ID=6]
    0x7f8b51834b10: i32 = TargetConstant<-1> [ID=6]
    0x7f8b51834b10: i32 = TargetConstant<-1> [ID=6]
    0x7f8b51834b10: i32 = TargetConstant<-1> [ID=6]
    0x7f8b51834b10: i32 = TargetConstant<-1> [ID=6]
    0x7f8b51834b10: i32 = TargetConstant<-1> [ID=6]
    0x7f8b51834b10: i32 = TargetConstant<-1> [ID=6]

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