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

Reviewers: eugenis, vlad.tsyrklevich

Subscribers: mgorny, hiraditya, llvm-commits

Differential Revision: https://reviews.llvm.org/D54502

llvm-svn: 347602

3 files changed, 62 insertions, 0 deletions

diff --git a/llvm/lib/Analysis/Analysis.cpp b/llvm/lib/Analysis/Analysis.cpp
index 49b1bdb2e77..ec8e9ad7e67 100644
--- a/llvm/lib/Analysis/Analysis.cpp
+++ b/llvm/lib/Analysis/Analysis.cpp
@@ -77,6 +77,7 @@ void llvm::initializeAnalysis(PassRegistry &Registry) {
   initializeRegionOnlyPrinterPass(Registry);
   initializeSCEVAAWrapperPassPass(Registry);
   initializeScalarEvolutionWrapperPassPass(Registry);
+  initializeStackSafetyInfoWrapperPassPass(Registry);
   initializeTargetTransformInfoWrapperPassPass(Registry);
   initializeTypeBasedAAWrapperPassPass(Registry);
   initializeScopedNoAliasAAWrapperPassPass(Registry);
diff --git a/llvm/lib/Analysis/CMakeLists.txt b/llvm/lib/Analysis/CMakeLists.txt
index c33e2a88127..c57d8ef69d6 100644
--- a/llvm/lib/Analysis/CMakeLists.txt
+++ b/llvm/lib/Analysis/CMakeLists.txt
@@ -81,6 +81,7 @@ add_llvm_library(LLVMAnalysis
   ScalarEvolutionAliasAnalysis.cpp
   ScalarEvolutionExpander.cpp
   ScalarEvolutionNormalization.cpp
+  StackSafetyAnalysis.cpp
   SyncDependenceAnalysis.cpp
   SyntheticCountsUtils.cpp
   TargetLibraryInfo.cpp
diff --git a/llvm/lib/Analysis/StackSafetyAnalysis.cpp b/llvm/lib/Analysis/StackSafetyAnalysis.cpp
new file mode 100644
index 00000000000..3491242ff22
--- /dev/null
+++ b/llvm/lib/Analysis/StackSafetyAnalysis.cpp
@@ -0,0 +1,60 @@
+//===- StackSafetyAnalysis.cpp - Stack memory safety analysis -------------===//
+//
+//                     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)