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Skip calculation of ArgumentWeights if it will never be used.

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Save a few bytes by allocating the correct size vector.

No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94589 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2010-01-26 21:31:24 +00:00
parent b554499871
commit e3039b6712
1 changed files with 6 additions and 0 deletions
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6
lib/Analysis/InlineCost.cpp
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@ -223,8 +223,14 @@ void InlineCostAnalyzer::FunctionInfo::analyzeFunction(Function *F) {
if (Metrics.NumRets==1)
--Metrics.NumInsts;
// Don't bother calculating argument weights if we are never going to inline
// the function anyway.
if (Metrics.NeverInline)
return;
// Check out all of the arguments to the function, figuring out how much
// code can be eliminated if one of the arguments is a constant.
ArgumentWeights.reserve(F->arg_size());
for (Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
ArgumentWeights.push_back(ArgInfo(CountCodeReductionForConstant(I),
CountCodeReductionForAlloca(I)));