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Splats can contain undef's; make sure to handle them correctly. PR11526. 

llvm-svn: 146299
This commit is contained in:
Eli Friedman 2011-12-09 23:54:42 +00:00
parent 19939cc380
commit 4e36a934dc
2 changed files with 11 additions and 2 deletions
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3
llvm/lib/Target/ARM/ARMISelLowering.cpp
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@ -3984,8 +3984,7 @@ SDValue ARMTargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG,
// Use vmov.f32 to materialize other v2f32 and v4f32 splats.
if (VT == MVT::v2f32 || VT == MVT::v4f32) {
ConstantFPSDNode *C = cast<ConstantFPSDNode>(Op.getOperand(0));
int ImmVal = ARM_AM::getFP32Imm(C->getValueAPF());
int ImmVal = ARM_AM::getFP32Imm(SplatBits);
if (ImmVal != -1) {
SDValue Val = DAG.getTargetConstant(ImmVal, MVT::i32);
return DAG.getNode(ARMISD::VMOVFPIMM, dl, VT, Val);

10
llvm/test/CodeGen/ARM/vmov.ll
View File

@ -371,3 +371,13 @@ entry:
store <4 x float> <float 3.100000e+01, float 3.100000e+01, float 3.100000e+01, float 3.100000e+01>, <4 x float>* %p, align 4
ret void
}
define void @v_mov_v4f32_undef(<4 x float> * nocapture %p) nounwind {
entry:
;CHECK: v_mov_v4f32_undef:
;CHECK: vmov.f32 q{{.*}}, #1.000000e+00
%a = load <4 x float> *%p
%b = fadd <4 x float> %a, <float undef, float 1.0, float 1.0, float 1.0>
store <4 x float> %b, <4 x float> *%p
ret void
}