diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp index f167762b602..347aeb6989a 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp @@ -3776,6 +3776,13 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) { II->setOperand(0, UndefValue::get(Old->getType())); return II; } + case Intrinsic::amdgcn_readfirstlane: + case Intrinsic::amdgcn_readlane: { + // A constant value is trivially uniform. + if (Constant *C = dyn_cast<Constant>(II->getArgOperand(0))) + return replaceInstUsesWith(*II, C); + break; + } case Intrinsic::stackrestore: { // If the save is right next to the restore, remove the restore. This can // happen when variable allocas are DCE'd. |
