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-rw-r--r--llvm/lib/Transforms/InstCombine/InstructionCombining.cpp9
1 files changed, 9 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
index b1828d0fe32..7656d669e8a 100644
--- a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
@@ -3131,6 +3131,15 @@ Instruction *InstCombiner::visitLandingPadInst(LandingPadInst &LI) {
return nullptr;
}
+Instruction *InstCombiner::visitFreeze(FreezeInst &I) {
+ Value *Op0 = I.getOperand(0);
+
+ if (Value *V = SimplifyFreezeInst(Op0, SQ.getWithInstruction(&I)))
+ return replaceInstUsesWith(I, V);
+
+ return nullptr;
+}
+
/// Try to move the specified instruction from its current block into the
/// beginning of DestBlock, which can only happen if it's safe to move the
/// instruction past all of the instructions between it and the end of its
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