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cb89dd6834
Summary: This is the first set of changes implementing the RFC from http://thread.gmane.org/gmane.comp.compilers.llvm.devel/98334 This is a cross-sectional patch; rather than implementing the hotness attribute for all optimization remarks and all passes in a patch set, it implements it for the 'missed-optimization' remark for Loop Distribution. My goal is to shake out the design issues before scaling it up to other types and passes. Hotness is computed as an integer as the multiplication of the block frequency with the function entry count. It's only printed in opt currently since clang prints the diagnostic fields directly. E.g.: remark: /tmp/t.c:3:3: loop not distributed: use -Rpass-analysis=loop-distribute for more info (hotness: 300) A new API added is similar to emitOptimizationRemarkMissed. The difference is that it additionally takes a code region that the diagnostic corresponds to. From this, hotness is computed using BFI. The new API is exposed via an analysis pass so that it can be made dependent on LazyBFI. (Thanks to Hal for the analysis pass idea.) This feature can all be enabled by setDiagnosticHotnessRequested in the LLVM context. If this is off, LazyBFI is not calculated (D22141) so there should be no overhead. A new command-line option is added to turn this on in opt. My plan is to switch all user of emitOptimizationRemark* to use this module instead. Reviewers: hfinkel Subscribers: rcox2, mzolotukhin, llvm-commits Differential Revision: http://reviews.llvm.org/D21771 llvm-svn: 275583
130 lines
4.7 KiB
C++
130 lines
4.7 KiB
C++
//===-- Analysis.cpp ------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm-c/Analysis.h"
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#include "llvm-c/Initialization.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Verifier.h"
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#include "llvm/InitializePasses.h"
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#include "llvm/PassRegistry.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cstring>
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using namespace llvm;
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/// initializeAnalysis - Initialize all passes linked into the Analysis library.
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void llvm::initializeAnalysis(PassRegistry &Registry) {
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initializeAAEvalLegacyPassPass(Registry);
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initializeAliasSetPrinterPass(Registry);
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initializeBasicAAWrapperPassPass(Registry);
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initializeBlockFrequencyInfoWrapperPassPass(Registry);
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initializeBranchProbabilityInfoWrapperPassPass(Registry);
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initializeCallGraphWrapperPassPass(Registry);
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initializeCallGraphDOTPrinterPass(Registry);
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initializeCallGraphPrinterLegacyPassPass(Registry);
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initializeCallGraphViewerPass(Registry);
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initializeCostModelAnalysisPass(Registry);
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initializeCFGViewerPass(Registry);
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initializeCFGPrinterPass(Registry);
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initializeCFGOnlyViewerPass(Registry);
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initializeCFGOnlyPrinterPass(Registry);
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initializeCFLAndersAAWrapperPassPass(Registry);
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initializeCFLSteensAAWrapperPassPass(Registry);
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initializeDependenceAnalysisWrapperPassPass(Registry);
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initializeDelinearizationPass(Registry);
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initializeDemandedBitsWrapperPassPass(Registry);
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initializeDivergenceAnalysisPass(Registry);
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initializeDominanceFrontierWrapperPassPass(Registry);
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initializeDomViewerPass(Registry);
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initializeDomPrinterPass(Registry);
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initializeDomOnlyViewerPass(Registry);
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initializePostDomViewerPass(Registry);
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initializeDomOnlyPrinterPass(Registry);
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initializePostDomPrinterPass(Registry);
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initializePostDomOnlyViewerPass(Registry);
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initializePostDomOnlyPrinterPass(Registry);
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initializeAAResultsWrapperPassPass(Registry);
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initializeGlobalsAAWrapperPassPass(Registry);
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initializeIVUsersPass(Registry);
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initializeInstCountPass(Registry);
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initializeIntervalPartitionPass(Registry);
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initializeLazyBlockFrequencyInfoPassPass(Registry);
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initializeLazyValueInfoWrapperPassPass(Registry);
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initializeLintPass(Registry);
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initializeLoopInfoWrapperPassPass(Registry);
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initializeMemDepPrinterPass(Registry);
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initializeMemDerefPrinterPass(Registry);
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initializeMemoryDependenceWrapperPassPass(Registry);
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initializeModuleDebugInfoPrinterPass(Registry);
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initializeModuleSummaryIndexWrapperPassPass(Registry);
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initializeObjCARCAAWrapperPassPass(Registry);
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initializeOptimizationRemarkEmitterPass(Registry);
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initializePostDominatorTreeWrapperPassPass(Registry);
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initializeRegionInfoPassPass(Registry);
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initializeRegionViewerPass(Registry);
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initializeRegionPrinterPass(Registry);
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initializeRegionOnlyViewerPass(Registry);
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initializeRegionOnlyPrinterPass(Registry);
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initializeSCEVAAWrapperPassPass(Registry);
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initializeScalarEvolutionWrapperPassPass(Registry);
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initializeTargetTransformInfoWrapperPassPass(Registry);
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initializeTypeBasedAAWrapperPassPass(Registry);
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initializeScopedNoAliasAAWrapperPassPass(Registry);
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}
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void LLVMInitializeAnalysis(LLVMPassRegistryRef R) {
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initializeAnalysis(*unwrap(R));
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}
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void LLVMInitializeIPA(LLVMPassRegistryRef R) {
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initializeAnalysis(*unwrap(R));
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}
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LLVMBool LLVMVerifyModule(LLVMModuleRef M, LLVMVerifierFailureAction Action,
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char **OutMessages) {
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raw_ostream *DebugOS = Action != LLVMReturnStatusAction ? &errs() : nullptr;
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std::string Messages;
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raw_string_ostream MsgsOS(Messages);
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LLVMBool Result = verifyModule(*unwrap(M), OutMessages ? &MsgsOS : DebugOS);
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// Duplicate the output to stderr.
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if (DebugOS && OutMessages)
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*DebugOS << MsgsOS.str();
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if (Action == LLVMAbortProcessAction && Result)
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report_fatal_error("Broken module found, compilation aborted!");
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if (OutMessages)
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*OutMessages = strdup(MsgsOS.str().c_str());
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return Result;
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}
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LLVMBool LLVMVerifyFunction(LLVMValueRef Fn, LLVMVerifierFailureAction Action) {
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LLVMBool Result = verifyFunction(
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*unwrap<Function>(Fn), Action != LLVMReturnStatusAction ? &errs()
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: nullptr);
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if (Action == LLVMAbortProcessAction && Result)
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report_fatal_error("Broken function found, compilation aborted!");
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return Result;
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}
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void LLVMViewFunctionCFG(LLVMValueRef Fn) {
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Function *F = unwrap<Function>(Fn);
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F->viewCFG();
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}
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void LLVMViewFunctionCFGOnly(LLVMValueRef Fn) {
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Function *F = unwrap<Function>(Fn);
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F->viewCFGOnly();
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}
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