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Retain the name of the new internal global that's been shrunk.

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It's possible (e.g. after an LTO build) that an internal global may be used for
debugging purposes. If that's the case appending a '.b' to it makes it hard to
find that variable. Steal the name from the old GV before deleting it so that
they can find that variable again.

llvm-svn: 175104
This commit is contained in:
Bill Wendling 2013-02-13 23:00:51 +00:00
parent a6322b9e0a
commit 29c7662732
1 changed files with 5 additions and 2 deletions
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7
lib/Transforms/IPO/GlobalOpt.cpp
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@ -1846,10 +1846,10 @@ static bool TryToShrinkGlobalToBoolean(GlobalVariable *GV, Constant *OtherVal) {
bool StoringOther = SI->getOperand(0) == OtherVal;
// Only do this if we weren't storing a loaded value.
Value *StoreVal;
if (StoringOther || SI->getOperand(0) == InitVal)
if (StoringOther || SI->getOperand(0) == InitVal) {
StoreVal = ConstantInt::get(Type::getInt1Ty(GV->getContext()),
StoringOther);
else {
} else {
// Otherwise, we are storing a previously loaded copy. To do this,
// change the copy from copying the original value to just copying the
// bool.
@ -1888,6 +1888,9 @@ static bool TryToShrinkGlobalToBoolean(GlobalVariable *GV, Constant *OtherVal) {
UI->eraseFromParent();
}
// Retain the name of the old global variable. People who are debugging their
// programs may expect these variables to be named the same.
NewGV->takeName(GV);
GV->eraseFromParent();
return true;
}