Added "getCanonicalID()", "isFromSameFile", and "isFromMainFile" to compare

the files of different SourceLocations.  These methods correctly handle the
case where a file may have multiple FileIDs due to it being large enough
to be spread across several chunks.

llvm-svn: 49682

1 files changed, 4 insertions, 0 deletions

diff --git a/clang/lib/Basic/SourceLocation.cpp b/clang/lib/Basic/SourceLocation.cpp
index c01447567fb..83c264ad0b0 100644
--- a/clang/lib/Basic/SourceLocation.cpp
+++ b/clang/lib/Basic/SourceLocation.cpp
@@ -88,3 +88,7 @@ const llvm::MemoryBuffer* FullSourceLoc::getBuffer() const {
   assert (isValid());
   return SrcMgr->getBuffer(Loc.getFileID());
 }
+
+unsigned FullSourceLoc::getCanonicalFileID() const {
+  return SrcMgr->getCanonicalFileID(Loc);
+}