Added 2x Debug statements to ObjCARC that log when we handle the two undefined pointer-to-weak-pointer is NULL cases by replacing the given call inst with an undefined value.
The reason that there are two cases is that the first case handles the unary cases and the second the binary cases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171672 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/ObjCARC.cpp b/lib/Transforms/Scalar/ObjCARC.cpp
index e68f2ad..43f9519 100644
--- a/lib/Transforms/Scalar/ObjCARC.cpp
+++ b/lib/Transforms/Scalar/ObjCARC.cpp
@@ -2361,7 +2361,13 @@
new StoreInst(UndefValue::get(cast<PointerType>(Ty)->getElementType()),
Constant::getNullValue(Ty),
CI);
- CI->replaceAllUsesWith(UndefValue::get(CI->getType()));
+ llvm::Value *NewValue = UndefValue::get(CI->getType());
+ DEBUG(dbgs() << "ObjCARCOpt::OptimizeIndividualCalls: A null "
+ "pointer-to-weak-pointer is undefined behavior.\n"
+ " Old = " << *CI <<
+ "\n New = " <<
+ *NewValue << "\n");
+ CI->replaceAllUsesWith(NewValue);
CI->eraseFromParent();
continue;
}
@@ -2377,7 +2383,15 @@
new StoreInst(UndefValue::get(cast<PointerType>(Ty)->getElementType()),
Constant::getNullValue(Ty),
CI);
- CI->replaceAllUsesWith(UndefValue::get(CI->getType()));
+
+ llvm::Value *NewValue = UndefValue::get(CI->getType());
+ DEBUG(dbgs() << "ObjCARCOpt::OptimizeIndividualCalls: A null "
+ "pointer-to-weak-pointer is undefined behavior.\n"
+ " Old = " << *CI <<
+ "\n New = " <<
+ *NewValue << "\n");
+
+ CI->replaceAllUsesWith(NewValue);
CI->eraseFromParent();
continue;
}