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Factor shouldInline method out of Inliner.

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- No functionality change.

llvm-svn: 58355
This commit is contained in:
Daniel Dunbar 2008-10-29 01:02:02 +00:00
parent b33593aa75
commit 2265cf485e
2 changed files with 31 additions and 19 deletions
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6
include/llvm/Transforms/IPO/InlinerPass.h
View File

@ -23,7 +23,7 @@ namespace llvm {
class CallSite;
/// Inliner - This class contains all of the helper code which is used to
/// perform the inlining operations that does not depend on the policy.
/// perform the inlining operations that do not depend on the policy.
///
struct Inliner : public CallGraphSCCPass {
explicit Inliner(void *ID);
@ -63,6 +63,10 @@ struct Inliner : public CallGraphSCCPass {
private:
// InlineThreshold - Cache the value here for easy access.
unsigned InlineThreshold;
/// shouldInline - Return true if the inliner should attempt to
/// inline at the given CallSite.
bool shouldInline(CallSite CS);
};
} // End llvm namespace

44
lib/Transforms/IPO/Inliner.cpp
View File

@ -72,6 +72,31 @@ static bool InlineCallIfPossible(CallSite CS, CallGraph &CG,
}
return true;
}
/// shouldInline - Return true if the inliner should attempt to inline
/// at the given CallSite.
bool Inliner::shouldInline(CallSite CS) {
int Cost = getInlineCost(CS);
float FudgeFactor = getInlineFudgeFactor(CS);
int CurrentThreshold = InlineThreshold;
Function *Fn = CS.getCaller();
if (Fn && !Fn->isDeclaration()
&& Fn->hasFnAttr(Attribute::OptimizeForSize)
&& InlineThreshold != 50) {
CurrentThreshold = 50;
}
if (Cost >= (int)(CurrentThreshold * FudgeFactor)) {
DOUT << " NOT Inlining: cost=" << Cost
<< ", Call: " << *CS.getInstruction();
return false;
} else {
DOUT << " Inlining: cost=" << Cost
<< ", Call: " << *CS.getInstruction();
return true;
}
}
bool Inliner::runOnSCC(const std::vector<CallGraphNode*> &SCC) {
CallGraph &CG = getAnalysis<CallGraph>();
@ -136,24 +161,7 @@ bool Inliner::runOnSCC(const std::vector<CallGraphNode*> &SCC) {
// If the policy determines that we should inline this function,
// try to do so.
CallSite CS = CallSites[CSi];
int InlineCost = getInlineCost(CS);
float FudgeFactor = getInlineFudgeFactor(CS);
int CurrentThreshold = InlineThreshold;
Function *Fn = CS.getCaller();
if (Fn && !Fn->isDeclaration()
&& Fn->hasFnAttr(Attribute::OptimizeForSize)
&& InlineThreshold != 50) {
CurrentThreshold = 50;
}
if (InlineCost >= (int)(CurrentThreshold * FudgeFactor)) {
DOUT << " NOT Inlining: cost=" << InlineCost
<< ", Call: " << *CS.getInstruction();
} else {
DOUT << " Inlining: cost=" << InlineCost
<< ", Call: " << *CS.getInstruction();
if (shouldInline(CS)) {
// Attempt to inline the function...
if (InlineCallIfPossible(CS, CG, SCCFunctions,
getAnalysis<TargetData>())) {