diff options
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp index c259e7e9a93..845cf109897 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp @@ -3065,9 +3065,14 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) { break; } - case Intrinsic::amdgcn_rcp: { - if (const ConstantFP *C = dyn_cast<ConstantFP>(II->getArgOperand(0))) { + Value *Src = II->getArgOperand(0); + + // TODO: Move to ConstantFolding/InstSimplify? + if (isa<UndefValue>(Src)) + return replaceInstUsesWith(CI, Src); + + if (const ConstantFP *C = dyn_cast<ConstantFP>(Src)) { const APFloat &ArgVal = C->getValueAPF(); APFloat Val(ArgVal.getSemantics(), 1.0); APFloat::opStatus Status = Val.divide(ArgVal, @@ -3080,6 +3085,14 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) { break; } + case Intrinsic::amdgcn_rsq: { + Value *Src = II->getArgOperand(0); + + // TODO: Move to ConstantFolding/InstSimplify? + if (isa<UndefValue>(Src)) + return replaceInstUsesWith(CI, Src); + break; + } case Intrinsic::amdgcn_frexp_mant: case Intrinsic::amdgcn_frexp_exp: { Value *Src = II->getArgOperand(0); |
