maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

Use updated threshold for indirect call bonus 

When considering foo->bar inlining, if there is an indirect call in foo which gets resolved to a direct call (say baz), then we try to inline baz into bar with a threshold T and subtract max(T - Cost(bar->baz), 0) from Cost(foo->bar). This patch uses max(Threshold(bar->baz) - Cost(bar->baz)) instead, where Thresheld(bar->baz) could be different from T due to bonuses or subtractions. Threshold(bar->baz) - Cost(bar->baz) better represents the desirability of inlining baz into bar.

Differential Revision: http://reviews.llvm.org/D14309

llvm-svn: 254945
This commit is contained in:
Easwaran Raman 2015-12-07 21:21:20 +00:00
parent 1f1a15332b
commit 6d90d9f102
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
llvm/lib/Analysis/InlineCost.cpp
View File

@ -834,8 +834,8 @@ bool CallAnalyzer::visitCallSite(CallSite CS) {
CallAnalyzer CA(TTI, ACT, *F, InlineConstants::IndirectCallThreshold, CS);
if (CA.analyzeCall(CS)) {
// We were able to inline the indirect call! Subtract the cost from the
// bonus we want to apply, but don't go below zero.
Cost -= std::max(0, InlineConstants::IndirectCallThreshold - CA.getCost());
// threshold to get the bonus we want to apply, but don't go below zero.
Cost -= std::max(0, CA.getThreshold() - CA.getCost());
}
return Base::visitCallSite(CS);