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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.

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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
This commit is contained in:
Michael Gottesman 2013-01-06 21:54:30 +00:00
parent be0ffd1e5a
commit e549492c36
1 changed files with 16 additions and 2 deletions
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18
lib/Transforms/Scalar/ObjCARC.cpp
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@ -2361,7 +2361,13 @@ void ObjCARCOpt::OptimizeIndividualCalls(Function &F) {
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 @@ void ObjCARCOpt::OptimizeIndividualCalls(Function &F) {
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;
}