[IR] Inroduce ModuleToSummariesForIndexTy (NFC) (#105906)

This patch introduces type alias ModuleToSummariesForIndexTy.

I'm planning to change the type slightly to allow heterogeneous lookup
(that is, std::map<K, V, std::less<>>) in a subsequent patch.  The
problem is that changing the type affects many places.  Using a type
alias reduces the impact.

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/LTO/LTO.cpp b/llvm/lib/LTO/LTO.cpp
index ee01933..bd03133 100644
--- a/llvm/lib/LTO/LTO.cpp
+++ b/llvm/lib/LTO/LTO.cpp
@@ -1399,7 +1399,7 @@ public:
   Error emitFiles(const FunctionImporter::ImportMapTy &ImportList,
                   llvm::StringRef ModulePath,
                   const std::string &NewModulePath) {
-    std::map<std::string, GVSummaryMapTy> ModuleToSummariesForIndex;
+    ModuleToSummariesForIndexTy ModuleToSummariesForIndex;
     GVSummaryPtrSet DeclarationSummaries;
 
     std::error_code EC;