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Fix PR10499
- Check whether SSE is available before lowering all 1s vector building with PCMPEQD, which is only available from SSE2 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176058 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -5344,7 +5344,7 @@ X86TargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const {
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// Vectors containing all ones can be matched by pcmpeqd on 128-bit width
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// vectors or broken into v4i32 operations on 256-bit vectors. AVX2 can use
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// vpcmpeqd on 256-bit vectors.
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if (ISD::isBuildVectorAllOnes(Op.getNode())) {
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if (ISD::isBuildVectorAllOnes(Op.getNode()) && Subtarget->hasSSE2()) {
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if (VT == MVT::v4i32 || (VT == MVT::v8i32 && Subtarget->hasInt256()))
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return Op;
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14
test/CodeGen/X86/pr10499.ll
Normal file
14
test/CodeGen/X86/pr10499.ll
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@ -0,0 +1,14 @@
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; RUN: llc < %s -mtriple=x86_64-pc-linux -mcpu=corei7-avx -mattr=-sse2
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; No check as PR10499 is a crashing bug.
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define void @autogen_24438_500() {
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BB:
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%I = insertelement <8 x i32> undef, i32 -1, i32 4
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%BC = bitcast <8 x i32> %I to <8 x float>
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br label %CF
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CF: ; preds = %CF, %BB
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%ZE = fpext <8 x float> %BC to <8 x double>
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br label %CF
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}
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