diff options
Diffstat (limited to 'llvm/lib/Transforms/IPO/SampleProfile.cpp')
| -rw-r--r-- | llvm/lib/Transforms/IPO/SampleProfile.cpp | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/llvm/lib/Transforms/IPO/SampleProfile.cpp b/llvm/lib/Transforms/IPO/SampleProfile.cpp index b6a112d530e..33239bf5200 100644 --- a/llvm/lib/Transforms/IPO/SampleProfile.cpp +++ b/llvm/lib/Transforms/IPO/SampleProfile.cpp @@ -79,16 +79,6 @@ static cl::opt<double> SampleProfileHotThreshold( "sample-profile-inline-hot-threshold", cl::init(0.1), cl::value_desc("N"), cl::desc("Inlined functions that account for more than N% of all samples " "collected in the parent function, will be inlined again.")); -static cl::opt<double> SampleProfileGlobalHotThreshold( - "sample-profile-global-hot-threshold", cl::init(30), cl::value_desc("N"), - cl::desc("Top-level functions that account for more than N% of all samples " - "collected in the profile, will be marked as hot for the inliner " - "to consider.")); -static cl::opt<double> SampleProfileGlobalColdThreshold( - "sample-profile-global-cold-threshold", cl::init(0.5), cl::value_desc("N"), - cl::desc("Top-level functions that account for less than N% of all samples " - "collected in the profile, will be marked as cold for the inliner " - "to consider.")); namespace { typedef DenseMap<const BasicBlock *, uint64_t> BlockWeightMap; @@ -125,7 +115,6 @@ protected: const FunctionSamples *findCalleeFunctionSamples(const CallInst &I) const; const FunctionSamples *findFunctionSamples(const Instruction &I) const; bool inlineHotFunctions(Function &F); - bool emitInlineHints(Function &F); void printEdgeWeight(raw_ostream &OS, Edge E); void printBlockWeight(raw_ostream &OS, const BasicBlock *BB) const; void printBlockEquivalence(raw_ostream &OS, const BasicBlock *BB); @@ -622,63 +611,6 @@ SampleProfileLoader::findFunctionSamples(const Instruction &Inst) const { return FS; } -/// \brief Emit an inline hint if \p F is globally hot or cold. -/// -/// If \p F consumes a significant fraction of samples (indicated by -/// SampleProfileGlobalHotThreshold), apply the InlineHint attribute for the -/// inliner to consider the function hot. -/// -/// If \p F consumes a small fraction of samples (indicated by -/// SampleProfileGlobalColdThreshold), apply the Cold attribute for the inliner -/// to consider the function cold. -/// -/// FIXME - This setting of inline hints is sub-optimal. Instead of marking a -/// function globally hot or cold, we should be annotating individual callsites. -/// This is not currently possible, but work on the inliner will eventually -/// provide this ability. See http://reviews.llvm.org/D15003 for details and -/// discussion. -/// -/// \returns True if either attribute was applied to \p F. -bool SampleProfileLoader::emitInlineHints(Function &F) { - if (TotalCollectedSamples == 0) - return false; - - uint64_t FunctionSamples = Samples->getTotalSamples(); - double SamplesPercent = - (double)FunctionSamples / (double)TotalCollectedSamples * 100.0; - - // If the function collected more samples than the hot threshold, mark - // it globally hot. - if (SamplesPercent >= SampleProfileGlobalHotThreshold) { - F.addFnAttr(llvm::Attribute::InlineHint); - std::string Msg; - raw_string_ostream S(Msg); - S << "Applied inline hint to globally hot function '" << F.getName() - << "' with " << format("%.2f", SamplesPercent) - << "% of samples (threshold: " - << format("%.2f", SampleProfileGlobalHotThreshold.getValue()) << "%)"; - S.flush(); - emitOptimizationRemark(F.getContext(), DEBUG_TYPE, F, DebugLoc(), Msg); - return true; - } - - // If the function collected fewer samples than the cold threshold, mark - // it globally cold. - if (SamplesPercent <= SampleProfileGlobalColdThreshold) { - F.addFnAttr(llvm::Attribute::Cold); - std::string Msg; - raw_string_ostream S(Msg); - S << "Applied cold hint to globally cold function '" << F.getName() - << "' with " << format("%.2f", SamplesPercent) - << "% of samples (threshold: " - << format("%.2f", SampleProfileGlobalColdThreshold.getValue()) << "%)"; - S.flush(); - emitOptimizationRemark(F.getContext(), DEBUG_TYPE, F, DebugLoc(), Msg); - return true; - } - - return false; -} /// \brief Iteratively inline hot callsites of a function. /// @@ -1186,8 +1118,6 @@ bool SampleProfileLoader::emitAnnotations(Function &F) { DEBUG(dbgs() << "Line number for the first instruction in " << F.getName() << ": " << getFunctionLoc(F) << "\n"); - Changed |= emitInlineHints(F); - Changed |= inlineHotFunctions(F); // Compute basic block weights. |
