[Gardening] Const-Qualify Some llvm::Module References

Author: CodaFi

lib/FrontendTool/TBD.cpp

@@ -75,7 +75,8 @@ bool swift::inputFileKindCanHaveTBDValidated(InputFileKind kind) {
 }
 
 static bool validateSymbolSet(DiagnosticEngine &diags,
-                              llvm::StringSet<> symbols, llvm::Module &IRModule,
+                              llvm::StringSet<> symbols,
+                              const llvm::Module &IRModule,
                               bool diagnoseExtraSymbolsInTBD) {
   auto error = false;
 
@@ -135,7 +136,8 @@ static bool validateSymbolSet(DiagnosticEngine &diags,
   return error;
 }
 
-bool swift::validateTBD(ModuleDecl *M, llvm::Module &IRModule,
+bool swift::validateTBD(ModuleDecl *M,
+                        const llvm::Module &IRModule,
                         const TBDGenOptions &opts,
                         bool diagnoseExtraSymbolsInTBD) {
   llvm::StringSet<> symbols;
@@ -145,7 +147,8 @@ bool swift::validateTBD(ModuleDecl *M, llvm::Module &IRModule,
                            diagnoseExtraSymbolsInTBD);
 }
 
-bool swift::validateTBD(FileUnit *file, llvm::Module &IRModule,
+bool swift::validateTBD(FileUnit *file,
+                        const llvm::Module &IRModule,
                         const TBDGenOptions &opts,
                         bool diagnoseExtraSymbolsInTBD) {
   llvm::StringSet<> symbols;

lib/FrontendTool/TBD.h

@@ -28,10 +28,12 @@ struct TBDGenOptions;
 bool writeTBD(ModuleDecl *M, StringRef OutputFilename,
               const TBDGenOptions &Opts);
 bool inputFileKindCanHaveTBDValidated(InputFileKind kind);
-bool validateTBD(ModuleDecl *M, llvm::Module &IRModule,
+bool validateTBD(ModuleDecl *M,
+                 const llvm::Module &IRModule,
                  const TBDGenOptions &opts,
                  bool diagnoseExtraSymbolsInTBD);
-bool validateTBD(FileUnit *M, llvm::Module &IRModule,
+bool validateTBD(FileUnit *M,
+                 const llvm::Module &IRModule,
                  const TBDGenOptions &opts,
                  bool diagnoseExtraSymbolsInTBD);
 }

lib/IRGen/IRGen.cpp

@@ -356,7 +356,7 @@ class MD5Stream : public llvm::raw_ostream {
 /// Computes the MD5 hash of the llvm \p Module including the compiler version
 /// and options which influence the compilation.
 static void getHashOfModule(MD5::MD5Result &Result, const IRGenOptions &Opts,
-                            llvm::Module *Module,
+                            const llvm::Module *Module,
                             llvm::TargetMachine *TargetMachine,
                             version::Version const& effectiveLanguageVersion) {
   // Calculate the hash of the whole llvm module.