IRGen: Remove IRGenModule::CurSourceFile

Author: slavapestov

lib/IRGen/GenDecl.cpp

@@ -428,7 +428,6 @@ class PrettySourceFileEmission : public llvm::PrettyStackTraceEntry {
 /// Emit all the top-level code in the source file.
 void IRGenModule::emitSourceFile(SourceFile &SF) {
   PrettySourceFileEmission StackEntry(SF);
-  llvm::SaveAndRestore<SourceFile *> SetCurSourceFile(CurSourceFile, &SF);
 
   // Emit types and other global decls.
   for (auto *decl : SF.getTopLevelDecls())

lib/IRGen/IRGenModule.h

@@ -542,7 +542,6 @@ class IRGenModule {
   SILModuleConventions silConv;
   ModuleDecl *ObjCModule = nullptr;
   ModuleDecl *ClangImporterModule = nullptr;
-  SourceFile *CurSourceFile = nullptr;
 
   llvm::StringMap<ModuleDecl*> OriginalModules;
   llvm::SmallString<128> OutputFilename;

lib/IRGen/IRGenSIL.cpp

@@ -1585,12 +1585,6 @@ void IRGenModule::emitSILFunction(SILFunction *f) {
     return;
 
   PrettyStackTraceSILFunction stackTrace("emitting IR", f);
-  llvm::SaveAndRestore<SourceFile *> SetCurSourceFile(CurSourceFile);
-  if (auto dc = f->getModule().getAssociatedContext()) {
-    if (auto sf = dc->getParentSourceFile()) {
-      CurSourceFile = sf;
-    }
-  }
   IRGenSILFunction(*this, f).emitSILFunction();
 }