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The inliner was choosing to not consider call sites

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that appear in the SCC as a result of inlining as candidates
for inlining.  Change this so that it *does* consider call 
sites that change from being indirect to being direct as a
result of inlining.  This allows it to completely 
"devirtualize" the testcase.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102146 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2010-04-22 23:37:35 +00:00
parent 3a1287b470
commit fe9af3b1f7
4 changed files with 50 additions and 6 deletions
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9
lib/Transforms/Utils/InlineFunction.cpp
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@@ -170,7 +170,8 @@ static void HandleInlinedInvoke(InvokeInst *II, BasicBlock *FirstNewBlock,
static void UpdateCallGraphAfterInlining(CallSite CS,
Function::iterator FirstNewBlock,
DenseMap<const Value*, Value*> &ValueMap,
CallGraph &CG) {
InlineFunctionInfo &IFI) {
CallGraph &CG = *IFI.CG;
const Function *Caller = CS.getInstruction()->getParent()->getParent();
const Function *Callee = CS.getCalledFunction();
CallGraphNode *CalleeNode = CG[Callee];
@@ -210,6 +211,10 @@ static void UpdateCallGraphAfterInlining(CallSite CS,
if (Function *F = CallSite(NewCall).getCalledFunction()) {
// Indirect call site resolved to direct call.
CallerNode->addCalledFunction(CallSite::get(NewCall), CG[F]);
// Remember that this callsite got devirtualized for the client of
// InlineFunction.
IFI.DevirtualizedCalls.push_back(NewCall);
continue;
}
@@ -362,7 +367,7 @@ bool llvm::InlineFunction(CallSite CS, InlineFunctionInfo &IFI) {
// Update the callgraph if requested.
if (IFI.CG)
UpdateCallGraphAfterInlining(CS, FirstNewBlock, ValueMap, *IFI.CG);
UpdateCallGraphAfterInlining(CS, FirstNewBlock, ValueMap, IFI);
}
// If there are any alloca instructions in the block that used to be the entry