Make SourceManager::createFileID(UnownedTag, ...) take a const llvm::MemoryBuffer*

Requires making the llvm::MemoryBuffer* stored by SourceManager const,
which in turn requires making the accessors for that return const
llvm::MemoryBuffer*s and updating all call sites.

The original motivation for this was to use it and fix the TODO in
CodeGenAction.cpp's ConvertBackendLocation() by using the UnownedTag
version of createFileID, and since llvm::SourceMgr* hands out a const
llvm::MemoryBuffer* this is required. I'm not sure if fixing the TODO
this way actually works, but this seems like a good change on its own
anyways.

No intended behavior change.

Differential Revision: https://reviews.llvm.org/D60247

llvm-svn: 357724

1 files changed, 2 insertions, 2 deletions

diff --git a/clang/lib/StaticAnalyzer/Core/IssueHash.cpp b/clang/lib/StaticAnalyzer/Core/IssueHash.cpp
index 88d9cdab763..e7497f3fbda 100644
--- a/clang/lib/StaticAnalyzer/Core/IssueHash.cpp
+++ b/clang/lib/StaticAnalyzer/Core/IssueHash.cpp
@@ -120,7 +120,7 @@ static std::string GetEnclosingDeclContextSignature(const Decl *D) {
   return "";
 }
 
-static StringRef GetNthLineOfFile(llvm::MemoryBuffer *Buffer, int Line) {
+static StringRef GetNthLineOfFile(const llvm::MemoryBuffer *Buffer, int Line) {
   if (!Buffer)
     return "";
 
@@ -144,7 +144,7 @@ static std::string NormalizeLine(const SourceManager &SM, FullSourceLoc &L,
     col++;
   SourceLocation StartOfLine =
       SM.translateLineCol(SM.getFileID(L), L.getExpansionLineNumber(), col);
-  llvm::MemoryBuffer *Buffer =
+  const llvm::MemoryBuffer *Buffer =
       SM.getBuffer(SM.getFileID(StartOfLine), StartOfLine);
   if (!Buffer)
     return {};