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[FunctionAttrs] Inline the prototype attribute inference to an existing 

loop over the SCC.

The separate function wasn't really adding much, NFC.

llvm-svn: 251728
This commit is contained in:
Chandler Carruth 2015-10-31 00:28:37 +00:00
parent 98e6daf1fb
commit cada2d8d1e
1 changed files with 6 additions and 21 deletions
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27
llvm/lib/Transforms/IPO/FunctionAttrs.cpp
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@ -73,8 +73,6 @@ struct FunctionAttrs : public CallGraphSCCPass {
private: private:
TargetLibraryInfo *TLI; TargetLibraryInfo *TLI;
bool annotateLibraryCalls(const CallGraphSCC &SCC);
}; };
} }
@ -1750,27 +1748,9 @@ static bool inferPrototypeAttributes(Function &F, const TargetLibraryInfo &TLI)
return true; return true;
} }
/// Adds attributes to well-known standard library call declarations.
bool FunctionAttrs::annotateLibraryCalls(const CallGraphSCC &SCC) {
bool MadeChange = false;
// Check each function in turn annotating well-known library function
// declarations with attributes.
for (CallGraphSCC::iterator I = SCC.begin(), E = SCC.end(); I != E; ++I) {
Function *F = (*I)->getFunction();
if (F && F->isDeclaration())
MadeChange |= inferPrototypeAttributes(*F, *TLI);
}
return MadeChange;
}
bool FunctionAttrs::runOnSCC(CallGraphSCC &SCC) { bool FunctionAttrs::runOnSCC(CallGraphSCC &SCC) {
TLI = &getAnalysis<TargetLibraryInfoWrapperPass>().getTLI(); TLI = &getAnalysis<TargetLibraryInfoWrapperPass>().getTLI();
bool Changed = false;
// Annotate declarations for which we have special knowledge.
bool Changed = annotateLibraryCalls(SCC);
// We compute dedicated AA results for each function in the SCC as needed. We // We compute dedicated AA results for each function in the SCC as needed. We
// use a lambda referencing external objects so that they live long enough to // use a lambda referencing external objects so that they live long enough to
@ -1798,6 +1778,11 @@ bool FunctionAttrs::runOnSCC(CallGraphSCC &SCC) {
continue; continue;
} }
// When initially processing functions, also infer their prototype
// attributes if they are declarations.
if (F->isDeclaration())
Changed |= inferPrototypeAttributes(*F, *TLI);
SCCNodes.insert(F); SCCNodes.insert(F);
} }