[ThinLTO] Refactor some common code into getGlobalValueInfo method (NFC)

Refactor common code that queries the ModuleSummaryIndex for a value's
GlobalValueInfo struct into getGlobalValueInfo helper methods, which
will also be used by D18763.

llvm-svn: 265370

1 files changed, 12 insertions, 0 deletions

diff --git a/llvm/lib/IR/ModuleSummaryIndex.cpp b/llvm/lib/IR/ModuleSummaryIndex.cpp
index 5effc65158d..340eccac6bd 100644
--- a/llvm/lib/IR/ModuleSummaryIndex.cpp
+++ b/llvm/lib/IR/ModuleSummaryIndex.cpp
@@ -68,3 +68,15 @@ void ModuleSummaryIndex::removeEmptySummaryEntries() {
       ++MI;
   }
 }
+
+GlobalValueInfo *
+ModuleSummaryIndex::getGlobalValueInfo(uint64_t ValueGUID,
+                                       bool PerModuleIndex) const {
+  auto InfoList = findGlobalValueInfoList(ValueGUID);
+  assert(InfoList != end() && "GlobalValue not found in index");
+  assert(!PerModuleIndex ||
+         InfoList->second.size() == 1 &&
+             "Expected a single entry per global value in per-module index");
+  auto &Info = InfoList->second[0];
+  return Info.get();
+}