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Neaten this up a bit. No functionality change.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55789 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2008-09-04 19:16:20 +00:00
parent 10b359ccb6
commit f423abc289
1 changed files with 14 additions and 15 deletions
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29
lib/Analysis/IPA/GlobalsModRef.cpp
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@ -354,18 +354,17 @@ void GlobalsModRef::AnalyzeCallGraph(CallGraph &CG, Module &M) {
for (scc_iterator<CallGraph*> I = scc_begin(&CG), E = scc_end(&CG); I != E;
++I) {
std::vector<CallGraphNode *> &SCC = *I;
assert(!SCC.empty() && "SCC with no functions?");
FunctionRecord *FR = 0;
// Find a function record from the SCC (it doesn't matter which one).
for (unsigned i = 0, e = SCC.size(); i != e; ++i)
if (Function *F = SCC[i]->getFunction()) {
FR = &FunctionInfo[F];
break;
}
if (!FR)
// Nothing to do.
if (!SCC[0]->getFunction()) {
// Calls externally - can't say anything useful. Remove any existing
// function records (may have been created when scanning globals).
for (unsigned i = 0, e = SCC.size(); i != e; ++i)
FunctionInfo.erase(SCC[i]->getFunction());
continue;
}
FunctionRecord &FR = FunctionInfo[SCC[0]->getFunction()];
bool KnowNothing = false;
unsigned FunctionEffect = 0;
@ -389,7 +388,7 @@ void GlobalsModRef::AnalyzeCallGraph(CallGraph &CG, Module &M) {
// mark all globals read somewhere as being read by this function.
for (std::set<GlobalValue*>::iterator GI = ReadGlobals.begin(),
E = ReadGlobals.end(); GI != E; ++GI)
FR->GlobalInfo[*GI] |= Ref;
FR.GlobalInfo[*GI] |= Ref;
} else {
// Can't say anything useful.
KnowNothing = true;
@ -398,7 +397,7 @@ void GlobalsModRef::AnalyzeCallGraph(CallGraph &CG, Module &M) {
}
for (CallGraphNode::iterator CI = SCC[i]->begin(), E = SCC[i]->end();
CI != E; ++CI)
CI != E && !KnowNothing; ++CI)
if (Function *Callee = CI->second->getFunction()) {
if (FunctionRecord *CalleeFR = getFunctionInfo(Callee)) {
// Propagate function effect up.
@ -408,7 +407,7 @@ void GlobalsModRef::AnalyzeCallGraph(CallGraph &CG, Module &M) {
for (std::map<GlobalValue*, unsigned>::iterator GI =
CalleeFR->GlobalInfo.begin(), E = CalleeFR->GlobalInfo.end();
GI != E; ++GI)
FR->GlobalInfo[GI->first] |= GI->second;
FR.GlobalInfo[GI->first] |= GI->second;
} else {
// Can't say anything about it. However, if it is inside our SCC,
// then nothing needs to be done.
@ -445,12 +444,12 @@ void GlobalsModRef::AnalyzeCallGraph(CallGraph &CG, Module &M) {
++NumReadMemFunctions;
if (FunctionEffect == 0)
++NumNoMemFunctions;
FR->FunctionEffect = FunctionEffect;
FR.FunctionEffect = FunctionEffect;
// Finally, now that we know the full effect on this SCC, clone the
// information to each function in the SCC.
for (unsigned i = 1, e = SCC.size(); i != e; ++i)
FunctionInfo[SCC[i]->getFunction()] = *FR;
FunctionInfo[SCC[i]->getFunction()] = FR;
}
}