[StackSafety] Pass summary into codegen

Summary:
The patch wraps ThinLTO index into immutable
pass which can be used by StackSafety analysis.

Reviewers: eugenis, pcc

Reviewed By: eugenis

Subscribers: hiraditya, steven_wu, dexonsmith, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D80985

1 files changed, 22 insertions, 0 deletions

diff --git a/llvm/lib/Analysis/ModuleSummaryAnalysis.cpp b/llvm/lib/Analysis/ModuleSummaryAnalysis.cpp
index 9950798..e7d529d 100644
--- a/llvm/lib/Analysis/ModuleSummaryAnalysis.cpp
+++ b/llvm/lib/Analysis/ModuleSummaryAnalysis.cpp
@@ -909,3 +909,25 @@ void ModuleSummaryIndexWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.addRequired<ProfileSummaryInfoWrapperPass>();
   AU.addRequired<StackSafetyInfoWrapperPass>();
 }
+
+char ImmutableModuleSummaryIndexWrapperPass::ID = 0;
+
+ImmutableModuleSummaryIndexWrapperPass::ImmutableModuleSummaryIndexWrapperPass(
+    const ModuleSummaryIndex *Index)
+    : ImmutablePass(ID), Index(Index) {
+  initializeImmutableModuleSummaryIndexWrapperPassPass(
+      *PassRegistry::getPassRegistry());
+}
+
+void ImmutableModuleSummaryIndexWrapperPass::getAnalysisUsage(
+    AnalysisUsage &AU) const {
+  AU.setPreservesAll();
+}
+
+ImmutablePass *llvm::createImmutableModuleSummaryIndexWrapperPass(
+    const ModuleSummaryIndex *Index) {
+  return new ImmutableModuleSummaryIndexWrapperPass(Index);
+}
+
+INITIALIZE_PASS(ImmutableModuleSummaryIndexWrapperPass, "module-summary-info",
+                "Module summary info", false, true)