Fixed a bug in masked load/store in reversed loop.

Added a test.

The bug was submitted to bugzilla:
http://llvm.org/bugs/show_bug.cgi?id=22225

llvm-svn: 226791

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index 13880cb957e..74f1d6ef0a0 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -1875,6 +1875,7 @@ void InnerLoopVectorizer::vectorizeMemoryInstruction(Instruction *Instr) {
         // wide store needs to start at the last vector element.
         PartPtr = Builder.CreateGEP(Ptr, Builder.getInt32(-Part * VF));
         PartPtr = Builder.CreateGEP(PartPtr, Builder.getInt32(1 - VF));
+        Mask[Part] = reverseVector(Mask[Part]);
       }
 
       Value *VecPtr = Builder.CreateBitCast(PartPtr,
@@ -1903,6 +1904,7 @@ void InnerLoopVectorizer::vectorizeMemoryInstruction(Instruction *Instr) {
       // wide load needs to start at the last vector element.
       PartPtr = Builder.CreateGEP(Ptr, Builder.getInt32(-Part * VF));
       PartPtr = Builder.CreateGEP(PartPtr, Builder.getInt32(1 - VF));
+      Mask[Part] = reverseVector(Mask[Part]);
     }
 
     Instruction* NewLI;