[llvm] 6fd9c19 - [PowerPC] Fix typo in vector shuffle combining

[Qiu Chaofan via llvm-commits]

Author: Qiu Chaofan
Date: 2021-07-13T14:35:47+08:00
New Revision: 6fd9c1901f40c1e9beceff67e05570afe2914e65

URL: https://github.com/llvm/llvm-project/commit/6fd9c1901f40c1e9beceff67e05570afe2914e65
DIFF: https://github.com/llvm/llvm-project/commit/6fd9c1901f40c1e9beceff67e05570afe2914e65.diff

LOG: [PowerPC] Fix typo in vector shuffle combining

a22ecb4 fixed a crash on big endian subtargets. This commit fixes a typo
in that commit which may cause miscompile.

Added: 
    

Modified: 
    llvm/lib/Target/PowerPC/PPCISelLowering.cpp

Removed: 
    


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diff  --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
index ecdc1fb61e3f..094b50e15a03 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -14530,7 +14530,7 @@ SDValue PPCTargetLowering::combineVectorShuffle(ShuffleVectorSDNode *SVN,
     unsigned ValidLaneWidth =
         SToVLHS ? SToVLHS.getValueType().getScalarSizeInBits() /
                       LHS.getValueType().getScalarSizeInBits()
-                : SToVRHS.getValueType().getVectorNumElements() /
+                : SToVRHS.getValueType().getScalarSizeInBits() /
                       RHS.getValueType().getScalarSizeInBits();
 
     // Initially assume that neither input is permuted. These will be adjusted