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introduce a new CallGraphSCC class, and pass it around

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to CallGraphSCCPass's instead of passing around a
std::vector<CallGraphNode*>.  No functionality change,
but now we have a much tidier interface.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101558 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2010-04-16 22:42:17 +00:00
parent c7b65914e0
commit 2decb22222
10 changed files with 132 additions and 86 deletions
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lib/Transforms/IPO/ArgumentPromotion.cpp
+6 -5
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@@ -64,7 +64,7 @@ namespace {
CallGraphSCCPass::getAnalysisUsage(AU);
}
virtual bool runOnSCC(std::vector<CallGraphNode *> &SCC);
virtual bool runOnSCC(CallGraphSCC &SCC);
static char ID; // Pass identification, replacement for typeid
explicit ArgPromotion(unsigned maxElements = 3)
: CallGraphSCCPass(&ID), maxElements(maxElements) {}
@@ -91,17 +91,18 @@ Pass *llvm::createArgumentPromotionPass(unsigned maxElements) {
return new ArgPromotion(maxElements);
}
bool ArgPromotion::runOnSCC(std::vector<CallGraphNode *> &SCC) {
bool ArgPromotion::runOnSCC(CallGraphSCC &SCC) {
bool Changed = false, LocalChange;
do { // Iterate until we stop promoting from this SCC.
LocalChange = false;
// Attempt to promote arguments from all functions in this SCC.
for (unsigned i = 0, e = SCC.size(); i != e; ++i)
if (CallGraphNode *CGN = PromoteArguments(SCC[i])) {
for (CallGraphSCC::iterator I = SCC.begin(), E = SCC.end(); I != E; ++I) {
if (CallGraphNode *CGN = PromoteArguments(*I)) {
LocalChange = true;
SCC[i] = CGN;
SCC.ReplaceNode(*I, CGN);
}
}
Changed |= LocalChange; // Remember that we changed something.
} while (LocalChange);