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Add two statistics to help track how we are computing the inline cost.

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Yea, 'NumCallerCallersAnalyzed' isn't a great name, suggestions welcome.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154492 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth 2012-04-11 10:15:10 +00:00
parent 2e506198c8
commit d6fc26217e
2 changed files with 11 additions and 0 deletions
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5
lib/Analysis/InlineCost.cpp
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@ -29,9 +29,12 @@
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/Statistic.h"
using namespace llvm;
STATISTIC(NumCallsAnalyzed, "Number of call sites analyzed");
namespace {
class CallAnalyzer : public InstVisitor<CallAnalyzer, bool> {
@ -802,6 +805,8 @@ ConstantInt *CallAnalyzer::stripAndComputeInBoundsConstantOffsets(Value *&V) {
/// is below the computed threshold, then inlining was forcibly disabled by
/// some artifact of the rountine.
bool CallAnalyzer::analyzeCall(CallSite CS) {
++NumCallsAnalyzed;
// Track whether the post-inlining function would have more than one basic
// block. A single basic block is often intended for inlining. Balloon the
// threshold by 50% until we pass the single-BB phase.

6
lib/Transforms/IPO/Inliner.cpp
View File

@ -36,6 +36,11 @@ STATISTIC(NumCallsDeleted, "Number of call sites deleted, not inlined");
STATISTIC(NumDeleted, "Number of functions deleted because all callers found");
STATISTIC(NumMergedAllocas, "Number of allocas merged together");
// This weirdly named statistic tracks the number of times that, when attemting
// to inline a function A into B, we analyze the callers of B in order to see
// if those would be more profitable and blocked inline steps.
STATISTIC(NumCallerCallersAnalyzed, "Number of caller-callers analyzed");
static cl::opt<int>
InlineLimit("inline-threshold", cl::Hidden, cl::init(225), cl::ZeroOrMore,
cl::desc("Control the amount of inlining to perform (default = 225)"));
@ -277,6 +282,7 @@ bool Inliner::shouldInline(CallSite CS) {
}
InlineCost IC2 = getInlineCost(CS2);
++NumCallerCallersAnalyzed;
if (!IC2) {
callerWillBeRemoved = false;
continue;