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Fix infinite loop gccld'ing povray

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14962 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-07-18 08:12:57 +00:00
parent 67910e1eb0
commit da6cdfa9e8
1 changed files with 6 additions and 8 deletions
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14
lib/VMCore/Globals.cpp
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@ -17,7 +17,6 @@
#include "llvm/Module.h"
#include "llvm/SymbolTable.h"
#include "Support/LeakDetector.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
@ -28,21 +27,20 @@ using namespace llvm;
/// there are no non-constant uses of this GlobalValue. If there aren't then
/// this and the transitive closure of the constants can be deleted. See the
/// destructor for details.
namespace {
bool removeDeadConstantUsers(Constant* C) {
while (!C->use_empty()) {
static bool removeDeadConstantUsers(Constant* C) {
if (isa<GlobalValue>(C)) return false; // Cannot remove this
while (!C->use_empty())
if (Constant *User = dyn_cast<Constant>(C->use_back())) {
if (!removeDeadConstantUsers(User))
return false; // Constant wasn't dead
} else {
return false; // Non-constant usage;
}
}
if (!isa<GlobalValue>(C))
C->destroyConstant();
C->destroyConstant();
return true;
}
}
/// removeDeadConstantUsers - If there are any dead constant users dangling
/// off of this global value, remove them. This method is useful for clients