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| author | Nadav Rotem <nadav.rotem@intel.com> | 2012-01-12 15:31:55 +0000 |
|---|---|---|
| committer | Nadav Rotem <nadav.rotem@intel.com> | 2012-01-12 15:31:55 +0000 |
| commit | d2070b00efb97ee32e360d53edfd7bf6de88d62c (patch) | |
| tree | 3c93ceaaf0439741c09232d24df6537378ab75ae /lib/Target/X86/X86ISelLowering.cpp | |
| parent | fb418bab977ad1484f9513de82d710d88d239bc2 (diff) | |
| download | external_llvm-d2070b00efb97ee32e360d53edfd7bf6de88d62c.zip external_llvm-d2070b00efb97ee32e360d53edfd7bf6de88d62c.tar.gz external_llvm-d2070b00efb97ee32e360d53edfd7bf6de88d62c.tar.bz2 | |
Fix a bug in the AVX 256-bit shuffle code in cases where the splat element is on the boundary of two 128-bit vectors.
The attached testcase was stuck in an endless loop.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148027 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 771ca08..c643cef 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; |