diff options
Diffstat (limited to 'llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp b/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp index 304ee79d2b2..145cf87ef9f 100644 --- a/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp +++ b/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp @@ -466,6 +466,27 @@ int SystemZTTIImpl::getArithmeticInstrCost( if (Opcode == Instruction::FRem) return LIBCALL_COST; + // Give discount for some combined logical operations if supported. + if (Args.size() == 2 && ST->hasMiscellaneousExtensions3()) { + if (Opcode == Instruction::Xor) { + for (const Value *A : Args) { + if (const Instruction *I = dyn_cast<Instruction>(A)) + if (I->hasOneUse() && + (I->getOpcode() == Instruction::And || + I->getOpcode() == Instruction::Or || + I->getOpcode() == Instruction::Xor)) + return 0; + } + } + else if (Opcode == Instruction::Or || Opcode == Instruction::And) { + for (const Value *A : Args) { + if (const Instruction *I = dyn_cast<Instruction>(A)) + if (I->hasOneUse() && I->getOpcode() == Instruction::Xor) + return 0; + } + } + } + // Or requires one instruction, although it has custom handling for i64. if (Opcode == Instruction::Or) return 1; @@ -686,9 +707,9 @@ int SystemZTTIImpl::getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src, // TODO: Fix base implementation which could simplify things a bit here // (seems to miss on differentiating on scalar/vector types). - // Only 64 bit vector conversions are natively supported. - if (DstScalarBits == 64) { - if (SrcScalarBits == 64) + // Only 64 bit vector conversions are natively supported before arch13. + if (DstScalarBits == 64 || ST->hasVectorEnhancements2()) { + if (SrcScalarBits == DstScalarBits) return NumDstVectors; if (SrcScalarBits == 1) @@ -856,7 +877,7 @@ int SystemZTTIImpl::getCmpSelInstrCost(unsigned Opcode, Type *ValTy, case Instruction::Select: if (ValTy->isFloatingPointTy()) return 4; // No load on condition for FP - costs a conditional jump. - return 1; // Load On Condition. + return 1; // Load On Condition / Select Register. } } @@ -1009,7 +1030,8 @@ int SystemZTTIImpl::getMemoryOpCost(unsigned Opcode, Type *Src, (Src->isVectorTy() ? getNumVectorRegs(Src) : getNumberOfParts(Src)); // Store/Load reversed saves one instruction. - if (!Src->isVectorTy() && NumOps == 1 && I != nullptr) { + if (((!Src->isVectorTy() && NumOps == 1) || ST->hasVectorEnhancements2()) && + I != nullptr) { if (Opcode == Instruction::Load && I->hasOneUse()) { const Instruction *LdUser = cast<Instruction>(*I->user_begin()); // In case of load -> bswap -> store, return normal cost for the load. |
