[LSR] If there still has some uses of the value, do not set the value

with nullpter.
llvm · Mar 12, 2024 · 52be592 · 52be592
1 parent 8d61f82
commit 52be592
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/llvm/lib/Transforms/Utils/Local.cpp b/llvm/lib/Transforms/Utils/Local.cpp
@@ -588,10 +588,10 @@ void llvm::RecursivelyDeleteTriviallyDeadInstructions(
     // dead as we go.
     for (Use &OpU : I->operands()) {
       Value *OpV = OpU.get();
-      OpU.set(nullptr);
-
       if (!OpV->use_empty())
         continue;
+
+      OpU.set(nullptr);
 
       // If the operand is an instruction that became dead as we nulled out the
       // operand, and if it is 'trivially' dead, delete it in a future loop