commit 6cce3dae900152203a51299e928d8ec738537d6a
author Mon P Wang <wangmp@apple.com> Sun Nov 23 04:35:05 2008 +0000
committer Mon P Wang <wangmp@apple.com> Sun Nov 23 04:35:05 2008 +0000
tree 73a596fc8f6615323601363acc9aa48cf3722008
parent dccb025768746abb6b6587c2190a69793570887c

Added check to avoid generating extract subvector beyond the end of the vector when normalizing vector shuffles.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59900 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
index 9417042..f3948f9 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
@@ -2423,7 +2423,8 @@
           StartIdx[Input] = 0;
         } else {
           StartIdx[Input] = (MinRange[Input]/MaskNumElts)*MaskNumElts;
-          if (MaxRange[Input] - StartIdx[Input] < MaskNumElts) 
+          if (MaxRange[Input] - StartIdx[Input] < MaskNumElts &&
+              StartIdx[Input] + MaskNumElts < SrcNumElts) 
             RangeUse[Input] = 1; // Extract from a multiple of the mask length.
         }
       }