Add some debug output to SRETPromotion.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54464 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/IPO/StructRetPromotion.cpp b/lib/Transforms/IPO/StructRetPromotion.cpp
index aa74944..314d1b9 100644
--- a/lib/Transforms/IPO/StructRetPromotion.cpp
+++ b/lib/Transforms/IPO/StructRetPromotion.cpp
@@ -89,6 +89,8 @@
if (F->arg_size() == 0 || !F->hasStructRetAttr() || F->doesNotReturn())
return false;
+ DOUT << "SretPromotion: Looking at sret function " << F->getNameStart() << "\n";
+
assert (F->getReturnType() == Type::VoidTy && "Invalid function return type");
Function::arg_iterator AI = F->arg_begin();
const llvm::PointerType *FArgType = dyn_cast<PointerType>(AI->getType());
@@ -99,10 +101,12 @@
// Check if it is ok to perform this promotion.
if (isSafeToUpdateAllCallers(F) == false) {
+ DOUT << "SretPromotion: Not all callers can be updated\n";
NumRejectedSRETUses++;
return false;
}
+ DOUT << "SretPromotion: sret argument will be promoted\n";
NumSRET++;
// [1] Replace use of sret parameter
AllocaInst *TheAlloca = new AllocaInst (STy, NULL, "mrv",