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Fix PR10499

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- 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
This commit is contained in:
Michael Liao 2013-02-25 23:01:03 +00:00
parent b90cc2fa0b
commit 5e6e15caa7
2 changed files with 15 additions and 1 deletions
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2
lib/Target/X86/X86ISelLowering.cpp
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@ -5344,7 +5344,7 @@ X86TargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const {
// Vectors containing all ones can be matched by pcmpeqd on 128-bit width
// vectors or broken into v4i32 operations on 256-bit vectors. AVX2 can use
// vpcmpeqd on 256-bit vectors.
if (ISD::isBuildVectorAllOnes(Op.getNode())) {
if (ISD::isBuildVectorAllOnes(Op.getNode()) && Subtarget->hasSSE2()) {
if (VT == MVT::v4i32 || (VT == MVT::v8i32 && Subtarget->hasInt256()))
return Op;

14
test/CodeGen/X86/pr10499.ll Normal file
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@ -0,0 +1,14 @@
; RUN: llc < %s -mtriple=x86_64-pc-linux -mcpu=corei7-avx -mattr=-sse2
; No check as PR10499 is a crashing bug.
define void @autogen_24438_500() {
BB:
%I = insertelement <8 x i32> undef, i32 -1, i32 4
%BC = bitcast <8 x i32> %I to <8 x float>
br label %CF
CF: ; preds = %CF, %BB
%ZE = fpext <8 x float> %BC to <8 x double>
br label %CF
}