[stack-safety] Empty local passes for Stack Safety Local Analysis

[vitalybuka]

sort some lines

[vlad.tsyrklevich]

llvm/include/llvm/Analysis/StackSafetyAnalysis.h

1

Outdated comment.

27

I'd prefer if this were 'StackSafetyInfo wrapper for the new pass manager.' and then the upcoming comment on StackSafetyInfo makes it clear what that does. This makes the relationship between StackSafetyAnalysis and StackSafetyInfoWrapperPass clearer.

llvm/lib/Analysis/StackSafetyAnalysis.cpp

2

Broken comment formatting

[vitalybuka]

comments

[vitalybuka]

fixed comment

[vitalybuka]

ping

[vitalybuka]

ping

llvm/include/llvm/Analysis/StackSafetyAnalysis.h

+//===- StackSafetyAnalysis.h - Module summary index builder ---*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Stack Safety Analysis detects allocas and arguments with safe access.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ANALYSIS_STACKSAFETYANALYSIS_H
+#define LLVM_ANALYSIS_STACKSAFETYANALYSIS_H
+
+#include "llvm/IR/PassManager.h"
+#include "llvm/Pass.h"
+
+namespace llvm {
+
+class StackSafetyInfo {
+public:
+  void print(raw_ostream &O) const;
+};
+
+/// Function-local stack safety analysis pass.
+class StackSafetyAnalysis : public AnalysisInfoMixin<StackSafetyAnalysis> {
+  friend AnalysisInfoMixin<StackSafetyAnalysis>;
+  static AnalysisKey Key;
+
+public:
+  using Result = StackSafetyInfo;
+  StackSafetyInfo run(Function &F, FunctionAnalysisManager &AM);
+};
+
+/// Printer pass for the \c StackSafetyAnalysis results.
+class StackSafetyPrinterPass : public PassInfoMixin<StackSafetyPrinterPass> {
+  raw_ostream &OS;
+
+public:
+  explicit StackSafetyPrinterPass(raw_ostream &OS) : OS(OS) {}
+  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+};
+
+/// StackSafetyInfo wrapper for the legacy pass manager
+class StackSafetyInfoWrapperPass : public FunctionPass {
+  StackSafetyInfo SSI;
+
+public:
+  static char ID;
+  StackSafetyInfoWrapperPass();
+
+  const StackSafetyInfo &getResult() const { return SSI; }
+
+  void print(raw_ostream &O, const Module *M) const override;
+  void getAnalysisUsage(AnalysisUsage &AU) const override;
+
+  bool runOnFunction(Function &F) override;
+};
+
+} // end namespace llvm
+
+#endif // LLVM_ANALYSIS_STACKSAFETYANALYSIS_H

llvm/include/llvm/InitializePasses.h

 void initializeSinkingLegacyPassPass(PassRegistry&);
 void initializeSjLjEHPreparePass(PassRegistry&);
 void initializeSlotIndexesPass(PassRegistry&);
 void initializeSpeculativeExecutionLegacyPassPass(PassRegistry&);
 void initializeSpillPlacementPass(PassRegistry&);
 void initializeStackColoringPass(PassRegistry&);
 void initializeStackMapLivenessPass(PassRegistry&);
 void initializeStackProtectorPass(PassRegistry&);
+void initializeStackSafetyInfoWrapperPassPass(PassRegistry &);
 void initializeStackSlotColoringPass(PassRegistry&);
 void initializeStraightLineStrengthReducePass(PassRegistry&);
 void initializeStripDeadDebugInfoPass(PassRegistry&);
 void initializeStripDeadPrototypesLegacyPassPass(PassRegistry&);
 void initializeStripDebugDeclarePass(PassRegistry&);
 void initializeStripGCRelocatesPass(PassRegistry&);
 void initializeStripNonDebugSymbolsPass(PassRegistry&);
 void initializeStripNonLineTableDebugInfoPass(PassRegistry&);

llvm/lib/Analysis/Analysis.cpp

void llvm::initializeAnalysis(PassRegistry &Registry) {
   initializePostDominatorTreeWrapperPassPass(Registry);
   initializeRegionInfoPassPass(Registry);
   initializeRegionViewerPass(Registry);
   initializeRegionPrinterPass(Registry);
   initializeRegionOnlyViewerPass(Registry);
   initializeRegionOnlyPrinterPass(Registry);
   initializeSCEVAAWrapperPassPass(Registry);
   initializeScalarEvolutionWrapperPassPass(Registry);
+  initializeStackSafetyInfoWrapperPassPass(Registry);
   initializeTargetTransformInfoWrapperPassPass(Registry);
   initializeTypeBasedAAWrapperPassPass(Registry);
   initializeScopedNoAliasAAWrapperPassPass(Registry);
   initializeLCSSAVerificationPassPass(Registry);
   initializeMemorySSAWrapperPassPass(Registry);
   initializeMemorySSAPrinterLegacyPassPass(Registry);
 }
 

llvm/lib/Analysis/CMakeLists.txt

add_llvm_library(LLVMAnalysis
   PtrUseVisitor.cpp
   RegionInfo.cpp
   RegionPass.cpp
   RegionPrinter.cpp
   ScalarEvolution.cpp
   ScalarEvolutionAliasAnalysis.cpp
   ScalarEvolutionExpander.cpp
   ScalarEvolutionNormalization.cpp
+  StackSafetyAnalysis.cpp
   SyncDependenceAnalysis.cpp
   SyntheticCountsUtils.cpp
   TargetLibraryInfo.cpp
   TargetTransformInfo.cpp
   Trace.cpp
   TypeBasedAliasAnalysis.cpp
   TypeMetadataUtils.cpp
   ScopedNoAliasAA.cpp

llvm/lib/Analysis/StackSafetyAnalysis.cpp

+//===- StackSafetyAnalysis.cpp - Safe Stack Insertion
+//-------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Analysis/StackSafetyAnalysis.h"
+
+#include "llvm/Analysis/ScalarEvolutionExpressions.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace llvm;
+
+#define DEBUG_TYPE "stack-safety"
+
+AnalysisKey StackSafetyAnalysis::Key;
+
+void StackSafetyInfo::print(raw_ostream &O) const { O << "Not Implemented\n"; }
+
+StackSafetyInfo StackSafetyAnalysis::run(Function &F,
+                                         FunctionAnalysisManager &AM) {
+  return StackSafetyInfo();
+}
+
+PreservedAnalyses StackSafetyPrinterPass::run(Function &F,
+                                              FunctionAnalysisManager &AM) {
+  OS << "'Stack Safety Local Analysis' for function '" << F.getName() << "'\n";
+  AM.getResult<StackSafetyAnalysis>(F).print(OS);
+  return PreservedAnalyses::all();
+}
+
+char StackSafetyInfoWrapperPass::ID = 0;
+
+StackSafetyInfoWrapperPass::StackSafetyInfoWrapperPass() : FunctionPass(ID) {
+  initializeStackSafetyInfoWrapperPassPass(*PassRegistry::getPassRegistry());
+}
+
+void StackSafetyInfoWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const {
+  AU.addRequired<ScalarEvolutionWrapperPass>();
+  AU.setPreservesAll();
+}
+
+void StackSafetyInfoWrapperPass::print(raw_ostream &O, const Module *M) const {
+  SSI.print(O);
+}
+
+bool StackSafetyInfoWrapperPass::runOnFunction(Function &F) { return false; }
+
+static const char LocalPassArg[] = "stack-safety-local";
+static const char LocalPassName[] = "Stack Safety Local Analysis";
+INITIALIZE_PASS_BEGIN(StackSafetyInfoWrapperPass, LocalPassArg, LocalPassName,
+                      false, true)
+INITIALIZE_PASS_DEPENDENCY(ScalarEvolutionWrapperPass)
+INITIALIZE_PASS_END(StackSafetyInfoWrapperPass, LocalPassArg, LocalPassName,
+                    false, true)

llvm/lib/Passes/PassBuilder.cpp

 #include "llvm/Analysis/OptimizationRemarkEmitter.h"
 #include "llvm/Analysis/PhiValues.h"
 #include "llvm/Analysis/PostDominators.h"
 #include "llvm/Analysis/ProfileSummaryInfo.h"
 #include "llvm/Analysis/RegionInfo.h"
 #include "llvm/Analysis/ScalarEvolution.h"
 #include "llvm/Analysis/ScalarEvolutionAliasAnalysis.h"
 #include "llvm/Analysis/ScopedNoAliasAA.h"
+#include "llvm/Analysis/StackSafetyAnalysis.h"
 #include "llvm/Analysis/TargetLibraryInfo.h"
 #include "llvm/Analysis/TargetTransformInfo.h"
 #include "llvm/Analysis/TypeBasedAliasAnalysis.h"
 #include "llvm/CodeGen/PreISelIntrinsicLowering.h"
 #include "llvm/CodeGen/UnreachableBlockElim.h"
 #include "llvm/IR/Dominators.h"
 #include "llvm/IR/IRPrintingPasses.h"
 #include "llvm/IR/PassManager.h"
 #include "llvm/IR/Verifier.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/FormatVariadic.h"
 #include "llvm/Support/Regex.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Transforms/AggressiveInstCombine/AggressiveInstCombine.h"
-#include "llvm/Transforms/Instrumentation/CGProfile.h"
 #include "llvm/Transforms/IPO/AlwaysInliner.h"
 #include "llvm/Transforms/IPO/ArgumentPromotion.h"
 #include "llvm/Transforms/IPO/CalledValuePropagation.h"
 #include "llvm/Transforms/IPO/ConstantMerge.h"
 #include "llvm/Transforms/IPO/CrossDSOCFI.h"
 #include "llvm/Transforms/IPO/DeadArgumentElimination.h"
 #include "llvm/Transforms/IPO/ElimAvailExtern.h"
 #include "llvm/Transforms/IPO/ForceFunctionAttrs.h"

 #include "llvm/Transforms/IPO/PartialInlining.h"
 #include "llvm/Transforms/IPO/SCCP.h"
 #include "llvm/Transforms/IPO/SampleProfile.h"
 #include "llvm/Transforms/IPO/StripDeadPrototypes.h"
 #include "llvm/Transforms/IPO/SyntheticCountsPropagation.h"
 #include "llvm/Transforms/IPO/WholeProgramDevirt.h"
 #include "llvm/Transforms/InstCombine/InstCombine.h"
 #include "llvm/Transforms/Instrumentation/BoundsChecking.h"
+#include "llvm/Transforms/Instrumentation/CGProfile.h"
 #include "llvm/Transforms/Instrumentation/ControlHeightReduction.h"
 #include "llvm/Transforms/Instrumentation/GCOVProfiler.h"
 #include "llvm/Transforms/Instrumentation/InstrProfiling.h"
 #include "llvm/Transforms/Instrumentation/PGOInstrumentation.h"
 #include "llvm/Transforms/Scalar/ADCE.h"
 #include "llvm/Transforms/Scalar/AlignmentFromAssumptions.h"
 #include "llvm/Transforms/Scalar/BDCE.h"
 #include "llvm/Transforms/Scalar/CallSiteSplitting.h"

llvm/lib/Passes/PassRegistry.def

 FUNCTION_ANALYSIS("da", DependenceAnalysis())
 FUNCTION_ANALYSIS("memdep", MemoryDependenceAnalysis())
 FUNCTION_ANALYSIS("memoryssa", MemorySSAAnalysis())
 FUNCTION_ANALYSIS("phi-values", PhiValuesAnalysis())
 FUNCTION_ANALYSIS("regions", RegionInfoAnalysis())
 FUNCTION_ANALYSIS("no-op-function", NoOpFunctionAnalysis())
 FUNCTION_ANALYSIS("opt-remark-emit", OptimizationRemarkEmitterAnalysis())
 FUNCTION_ANALYSIS("scalar-evolution", ScalarEvolutionAnalysis())
+FUNCTION_ANALYSIS("stack-safety-local", StackSafetyAnalysis())
 FUNCTION_ANALYSIS("targetlibinfo", TargetLibraryAnalysis())
 FUNCTION_ANALYSIS("targetir",
                   TM ? TM->getTargetIRAnalysis() : TargetIRAnalysis())
 FUNCTION_ANALYSIS("verify", VerifierAnalysis())
 FUNCTION_ANALYSIS("pass-instrumentation", PassInstrumentationAnalysis(PIC))
 
 #ifndef FUNCTION_ALIAS_ANALYSIS
 #define FUNCTION_ALIAS_ANALYSIS(NAME, CREATE_PASS)                             \

 FUNCTION_PASS("print<postdomtree>", PostDominatorTreePrinterPass(dbgs()))
 FUNCTION_PASS("print<demanded-bits>", DemandedBitsPrinterPass(dbgs()))
 FUNCTION_PASS("print<domfrontier>", DominanceFrontierPrinterPass(dbgs()))
 FUNCTION_PASS("print<loops>", LoopPrinterPass(dbgs()))
 FUNCTION_PASS("print<memoryssa>", MemorySSAPrinterPass(dbgs()))
 FUNCTION_PASS("print<phi-values>", PhiValuesPrinterPass(dbgs()))
 FUNCTION_PASS("print<regions>", RegionInfoPrinterPass(dbgs()))
 FUNCTION_PASS("print<scalar-evolution>", ScalarEvolutionPrinterPass(dbgs()))
+FUNCTION_PASS("print<stack-safety-local>", StackSafetyPrinterPass(dbgs()))
 FUNCTION_PASS("reassociate", ReassociatePass())
 FUNCTION_PASS("sccp", SCCPPass())
 FUNCTION_PASS("simplify-cfg", SimplifyCFGPass())
 FUNCTION_PASS("sink", SinkingPass())
 FUNCTION_PASS("slp-vectorizer", SLPVectorizerPass())
 FUNCTION_PASS("speculative-execution", SpeculativeExecutionPass())
 FUNCTION_PASS("spec-phis", SpeculateAroundPHIsPass())
 FUNCTION_PASS("sroa", SROA())

llvm/test/Analysis/StackSafetyAnalysis/local.ll

+; RUN: opt -S -analyze -stack-safety-local < %s | FileCheck %s
+; RUN: opt -S -passes="print<stack-safety-local>" -disable-output < %s 2>&1 | FileCheck %s
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; CHECK: 'Stack Safety Local Analysis' for function 'Foo'
+; CHECK-NEXT: Not Implemented
+
+define dso_local void @Foo() {
+entry:
+  ret void
+}