diff options
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 16 | ||||
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.h | 2 |
2 files changed, 18 insertions, 0 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index e5122ab..5d495a6 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -18237,3 +18237,19 @@ unsigned X86VectorTargetTransformInfo::getCastInstrCost(unsigned Opcode, return VectorTargetTransformImpl::getCastInstrCost(Opcode, Dst, Src); } + +unsigned X86VectorTargetTransformInfo::getShuffleCost(ShuffleKind Kind, Type *Tp, + int Index) const { + // We only estimate the cost of reverse shuffles. + if (Kind != Reverse) + return VectorTargetTransformImpl::getShuffleCost(Kind, Tp, Index); + + std::pair<unsigned, MVT> LT = getTypeLegalizationCost(Tp); + unsigned Cost = 1; + if (LT.second.getSizeInBits() > 128) + Cost = 3; // Extract + insert + copy. + + // Multiple by the number of parts. + return Cost * LT.first; +} + diff --git a/lib/Target/X86/X86ISelLowering.h b/lib/Target/X86/X86ISelLowering.h index 1a696a8..1b4b5eb 100644 --- a/lib/Target/X86/X86ISelLowering.h +++ b/lib/Target/X86/X86ISelLowering.h @@ -973,6 +973,8 @@ namespace llvm { virtual unsigned getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src) const; + + unsigned getShuffleCost(ShuffleKind Kind, Type *Tp, int Index) const; }; } |