Use heterogenous lookup for std;:map<std::string with a StringRef. NFCI.
diff --git a/clang/lib/Frontend/CompilerInstance.cpp b/clang/lib/Frontend/CompilerInstance.cpp
index 0db8df0..fe78791 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -1634,15 +1634,15 @@
/// Select a source for loading the named module and compute the filename to
/// load it from.
-static ModuleSource
-selectModuleSource(Module *M, StringRef ModuleName, std::string &ModuleFilename,
- const std::map<std::string, std::string> &BuiltModules,
- HeaderSearch &HS) {
+static ModuleSource selectModuleSource(
+ Module *M, StringRef ModuleName, std::string &ModuleFilename,
+ const std::map<std::string, std::string, std::less<>> &BuiltModules,
+ HeaderSearch &HS) {
assert(ModuleFilename.empty() && "Already has a module source?");
// Check to see if the module has been built as part of this compilation
// via a module build pragma.
- auto BuiltModuleIt = BuiltModules.find(std::string(ModuleName));
+ auto BuiltModuleIt = BuiltModules.find(ModuleName);
if (BuiltModuleIt != BuiltModules.end()) {
ModuleFilename = BuiltModuleIt->second;
return MS_ModuleBuildPragma;