diff options
| -rw-r--r-- | include/llvm/Target/TargetLowering.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h index cd95a73..0130e07 100644 --- a/include/llvm/Target/TargetLowering.h +++ b/include/llvm/Target/TargetLowering.h @@ -1473,10 +1473,12 @@ public: if (NumElts == 1) return LegalizeKind(TypeScalarizeVector, EltVT); - // Try to widen vector elements until a legal type is found. + // Try to widen vector elements until the element type is a power of two and + // promote it to a legal type later on, for example: + // <3 x i8> -> <4 x i8> -> <4 x i32> if (EltVT.isInteger()) { // Vectors with a number of elements that is not a power of two are always - // widened, for example <3 x float> -> <4 x float>. + // widened, for example <3 x i8> -> <4 x i8>. if (!VT.isPow2VectorType()) { NumElts = (unsigned)NextPowerOf2(NumElts); EVT NVT = EVT::getVectorVT(Context, EltVT, NumElts); |