diff options
| -rw-r--r-- | llvm/lib/Analysis/InstructionSimplify.cpp | 26 | ||||
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp | 26 |
2 files changed, 28 insertions, 24 deletions
diff --git a/llvm/lib/Analysis/InstructionSimplify.cpp b/llvm/lib/Analysis/InstructionSimplify.cpp index f02dce7ecf3..93fb1143e50 100644 --- a/llvm/lib/Analysis/InstructionSimplify.cpp +++ b/llvm/lib/Analysis/InstructionSimplify.cpp @@ -4495,6 +4495,22 @@ static Value *SimplifyIntrinsic(Function *F, IterTy ArgBegin, IterTy ArgEnd, return *ArgBegin; return nullptr; } + case Intrinsic::bswap: { + Value *IIOperand = *ArgBegin; + Value *X = nullptr; + // bswap(bswap(x)) -> x + if (match(IIOperand, m_BSwap(m_Value(X)))) + return X; + return nullptr; + } + case Intrinsic::bitreverse: { + Value *IIOperand = *ArgBegin; + Value *X = nullptr; + // bitreverse(bitreverse(x)) -> x + if (match(IIOperand, m_BitReverse(m_Value(X)))) + return X; + return nullptr; + } default: return nullptr; } @@ -4549,6 +4565,16 @@ static Value *SimplifyIntrinsic(Function *F, IterTy ArgBegin, IterTy ArgEnd, return SimplifyRelativeLoad(C0, C1, Q.DL); return nullptr; } + case Intrinsic::powi: + if (ConstantInt *Power = dyn_cast<ConstantInt>(RHS)) { + // powi(x, 0) -> 1.0 + if (Power->isZero()) + return ConstantFP::get(LHS->getType(), 1.0); + // powi(x, 1) -> x + if (Power->isOne()) + return LHS; + } + return nullptr; default: return nullptr; } diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp index 8942b4742e8..4dfb22abb6e 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp @@ -1901,16 +1901,10 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) { lowerObjectSizeCall(II, DL, &TLI, /*MustSucceed=*/false)) return replaceInstUsesWith(CI, N); return nullptr; - case Intrinsic::bswap: { Value *IIOperand = II->getArgOperand(0); Value *X = nullptr; - // TODO should this be in InstSimplify? - // bswap(bswap(x)) -> x - if (match(IIOperand, m_BSwap(m_Value(X)))) - return replaceInstUsesWith(CI, X); - // bswap(trunc(bswap(x))) -> trunc(lshr(x, c)) if (match(IIOperand, m_Trunc(m_BSwap(m_Value(X))))) { unsigned C = X->getType()->getPrimitiveSizeInBits() - @@ -1921,18 +1915,6 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) { } break; } - - case Intrinsic::bitreverse: { - Value *IIOperand = II->getArgOperand(0); - Value *X = nullptr; - - // TODO should this be in InstSimplify? - // bitreverse(bitreverse(x)) -> x - if (match(IIOperand, m_BitReverse(m_Value(X)))) - return replaceInstUsesWith(CI, X); - break; - } - case Intrinsic::masked_load: if (Value *SimplifiedMaskedOp = simplifyMaskedLoad(*II, Builder)) return replaceInstUsesWith(CI, SimplifiedMaskedOp); @@ -1946,12 +1928,8 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) { case Intrinsic::powi: if (ConstantInt *Power = dyn_cast<ConstantInt>(II->getArgOperand(1))) { - // powi(x, 0) -> 1.0 - if (Power->isZero()) - return replaceInstUsesWith(CI, ConstantFP::get(CI.getType(), 1.0)); - // powi(x, 1) -> x - if (Power->isOne()) - return replaceInstUsesWith(CI, II->getArgOperand(0)); + // 0 and 1 are handled in instsimplify + // powi(x, -1) -> 1/x if (Power->isMinusOne()) return BinaryOperator::CreateFDiv(ConstantFP::get(CI.getType(), 1.0), |
