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Remove useless statistic, fix some slightly broken logic

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llvm-svn: 14958
This commit is contained in:
Chris Lattner 2004-07-18 07:22:58 +00:00
parent 99e46b2e81
commit 71f281984d
1 changed files with 4 additions and 8 deletions
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12
lib/Transforms/IPO/GlobalDCE.cpp
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@ -26,7 +26,6 @@ using namespace llvm;
namespace {
Statistic<> NumFunctions("globaldce","Number of functions removed");
Statistic<> NumVariables("globaldce","Number of global variables removed");
Statistic<> NumGVs("globaldce", "Number of global values removed");
struct GlobalDCE : public Pass {
// run - Do the GlobalDCE pass on the specified module, optionally updating
@ -171,13 +170,10 @@ void GlobalDCE::MarkUsedGlobalsAsNeeded(Constant *C) {
// might make it deader.
//
bool GlobalDCE::RemoveUnusedGlobalValue(GlobalValue &GV) {
for (Value::use_iterator I = GV.use_begin(), E = GV.use_end(); I != E; ++I)
if (GlobalValue* User = dyn_cast<GlobalValue>(*I))
if (User->removeDeadConstantUsers()) { // Only if unreferenced...
++NumGVs;
}
return false;
}
if (GV.use_empty()) return false;
GV.removeDeadConstantUsers();
return GV.use_empty();
}
// SafeToDestroyConstant - It is safe to destroy a constant iff it is only used
// by constants itself. Note that constants cannot be cyclic, so this test is