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Added statistics to count the number of retains/releases before/after optimization.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180697 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Gottesman 2013-04-29 06:16:57 +00:00
parent 2088d91792
commit fe7ea985fa
1 changed files with 47 additions and 0 deletions
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47
lib/Transforms/ObjCARC/ObjCARCOpts.cpp
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@ -303,6 +303,14 @@ STATISTIC(NumRets, "Number of return value forwarding "
"retain+autoreleaes eliminated");
STATISTIC(NumRRs, "Number of retain+release paths eliminated");
STATISTIC(NumPeeps, "Number of calls peephole-optimized");
STATISTIC(NumRetainsBeforeOpt,
"Number of retains before optimization.");
STATISTIC(NumReleasesBeforeOpt,
"Number of releases before optimization.");
STATISTIC(NumRetainsAfterOpt,
"Number of retains after optimization.");
STATISTIC(NumReleasesAfterOpt,
"Number of releases after optimization.");
namespace {
/// \enum Sequence
@ -1093,6 +1101,10 @@ namespace {
void OptimizeReturns(Function &F);
#ifndef NDEBUG
void GatherStatistics(Function &F, bool AfterOptimization = false);
#endif
virtual void getAnalysisUsage(AnalysisUsage &AU) const;
virtual bool doInitialization(Module &M);
virtual bool runOnFunction(Function &F);
@ -1480,6 +1492,7 @@ void ObjCARCOpt::OptimizeIndividualCalls(Function &F) {
break;
// FALLTHROUGH
case IC_Retain:
++NumRetainsBeforeOpt;
OptimizeRetainCall(F, Inst);
break;
case IC_RetainRV:
@ -1489,6 +1502,9 @@ void ObjCARCOpt::OptimizeIndividualCalls(Function &F) {
case IC_AutoreleaseRV:
OptimizeAutoreleaseRVCall(F, Inst, Class);
break;
case IC_Release:
++NumReleasesBeforeOpt;
break;
}
// objc_autorelease(x) -> objc_release(x) if x is otherwise unused.
@ -3006,6 +3022,30 @@ void ObjCARCOpt::OptimizeReturns(Function &F) {
}
}
#ifndef NDEBUG
void
ObjCARCOpt::GatherStatistics(Function &F, bool AfterOptimization) {
llvm::Statistic &NumRetains =
AfterOptimization? NumRetainsAfterOpt : NumRetainsBeforeOpt;
llvm::Statistic &NumReleases =
AfterOptimization? NumReleasesAfterOpt : NumReleasesBeforeOpt;
for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ) {
Instruction *Inst = &*I++;
switch (GetBasicInstructionClass(Inst)) {
default:
break;
case IC_Retain:
++NumRetains;
break;
case IC_Release:
++NumReleases;
break;
}
}
}
#endif
bool ObjCARCOpt::doInitialization(Module &M) {
if (!EnableARCOpts)
return false;
@ -3092,6 +3132,13 @@ bool ObjCARCOpt::runOnFunction(Function &F) {
(1 << IC_AutoreleaseRV)))
OptimizeReturns(F);
// Gather statistics after optimization.
#ifndef NDEBUG
if (AreStatisticsEnabled()) {
GatherStatistics(F, true);
}
#endif
DEBUG(dbgs() << "\n");
return Changed;