diff options
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 2 | ||||
| -rw-r--r-- | test/CodeGen/X86/2012-01-12-extract-sv.ll | 12 |
2 files changed, 13 insertions, 1 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 771ca08250..c643cefb6c 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -4413,7 +4413,7 @@ static SDValue PromoteSplat(ShuffleVectorSDNode *SV, SelectionDAG &DAG) { // Extract the 128-bit part containing the splat element and update // the splat element index when it refers to the higher register. if (Size == 256) { - unsigned Idx = (EltNo > NumElems/2) ? NumElems/2 : 0; + unsigned Idx = (EltNo >= NumElems/2) ? NumElems/2 : 0; V1 = Extract128BitVector(V1, DAG.getConstant(Idx, MVT::i32), DAG, dl); if (Idx > 0) EltNo -= NumElems/2; diff --git a/test/CodeGen/X86/2012-01-12-extract-sv.ll b/test/CodeGen/X86/2012-01-12-extract-sv.ll new file mode 100644 index 0000000000..fa8e80f0bd --- /dev/null +++ b/test/CodeGen/X86/2012-01-12-extract-sv.ll @@ -0,0 +1,12 @@ +; RUN: llc < %s -march=x86 -mcpu=corei7-avx -mattr=+avx -mtriple=i686-pc-win32 | FileCheck %s + +; CHECK: endless_loop +define void @endless_loop() { +entry: + %0 = load <8 x i32> addrspace(1)* undef, align 32 + %1 = shufflevector <8 x i32> %0, <8 x i32> undef, <16 x i32> <i32 4, i32 4, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef> + %2 = shufflevector <16 x i32> <i32 undef, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 undef>, <16 x i32> %1, <16 x i32> <i32 16, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 17> + store <16 x i32> %2, <16 x i32> addrspace(1)* undef, align 64 + ret void +; CHECK: ret +} |