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-rw-r--r--llvm/lib/Transforms/IPO/FunctionAttrs.cpp5
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/IPO/FunctionAttrs.cpp b/llvm/lib/Transforms/IPO/FunctionAttrs.cpp
index 96dcf9de7d5..0fde10752b5 100644
--- a/llvm/lib/Transforms/IPO/FunctionAttrs.cpp
+++ b/llvm/lib/Transforms/IPO/FunctionAttrs.cpp
@@ -496,6 +496,11 @@ static bool addArgumentReturnedAttrs(const SCCNodeSet &SCCNodes) {
if (F->getReturnType()->isVoidTy())
continue;
+ // There is nothing to do if an argument is already marked as 'returned'.
+ if (any_of(F->args(),
+ [](const Argument &Arg) { return Arg.hasReturnedAttr(); }))
+ continue;
+
auto FindRetArg = [&]() -> Value * {
Value *RetArg = nullptr;
for (BasicBlock &BB : *F)
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