diff options
Diffstat (limited to 'include/llvm/Target')
| -rw-r--r-- | include/llvm/Target/TargetLowering.h | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h index 71a1d89..2c65588 100644 --- a/include/llvm/Target/TargetLowering.h +++ b/include/llvm/Target/TargetLowering.h @@ -168,8 +168,7 @@ public: LegalizeAction getTypeAction(MVT VT) const { if (VT.isExtended()) { if (VT.isVector()) { - // First try vector widening - return Promote; + return VT.isPow2VectorType() ? Expand : Promote; } if (VT.isInteger()) // First promote to a power-of-two size, then expand if necessary. @@ -216,9 +215,15 @@ public: } if (VT.isVector()) { - unsigned NumElts = VT.getVectorNumElements(); - MVT EltVT = VT.getVectorElementType(); - return (NumElts == 1) ? EltVT : MVT::getVectorVT(EltVT, NumElts / 2); + MVT NVT = VT.getPow2VectorType(); + if (NVT == VT) { + // Vector length is a power of 2 - split to half the size. + unsigned NumElts = VT.getVectorNumElements(); + MVT EltVT = VT.getVectorElementType(); + return (NumElts == 1) ? EltVT : MVT::getVectorVT(EltVT, NumElts / 2); + } + // Promote to a power of two size, avoiding multi-step promotion. + return getTypeAction(NVT) == Promote ? getTypeToTransformTo(NVT) : NVT; } else if (VT.isInteger()) { MVT NVT = VT.getRoundIntegerType(); if (NVT == VT) |