diff options
Diffstat (limited to 'clang/lib/CodeGen/CGExprScalar.cpp')
| -rw-r--r-- | clang/lib/CodeGen/CGExprScalar.cpp | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp index d3250ea6463..c0355f690de 100644 --- a/clang/lib/CodeGen/CGExprScalar.cpp +++ b/clang/lib/CodeGen/CGExprScalar.cpp @@ -922,16 +922,8 @@ Value *ScalarExprEmitter::VisitShuffleVectorExpr(ShuffleVectorExpr *E) { llvm::VectorType *MTy = cast<llvm::VectorType>(Mask->getType()); llvm::Constant* EltMask; - // Treat vec3 like vec4. - if ((LHSElts == 6) && (E->getNumSubExprs() == 3)) - EltMask = llvm::ConstantInt::get(MTy->getElementType(), - (1 << llvm::Log2_32(LHSElts+2))-1); - else if ((LHSElts == 3) && (E->getNumSubExprs() == 2)) - EltMask = llvm::ConstantInt::get(MTy->getElementType(), - (1 << llvm::Log2_32(LHSElts+1))-1); - else - EltMask = llvm::ConstantInt::get(MTy->getElementType(), - (1 << llvm::Log2_32(LHSElts))-1); + EltMask = llvm::ConstantInt::get(MTy->getElementType(), + llvm::NextPowerOf2(LHSElts-1)-1); // Mask off the high bits of each shuffle index. Value *MaskBits = llvm::ConstantVector::getSplat(MTy->getNumElements(), |
