Module Debugging: Canonicalize the file names used as PCH module names

by stripping the path. Follow-up to r258555.

This is safe because only one PCH per CU is currently supported for
module debugging.

rdar://problem/24301262

llvm-svn: 258582

1 files changed, 3 insertions, 2 deletions

diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
index 833ff57e4d0..97fbb45e121 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -7581,8 +7581,9 @@ ASTReader::getSourceDescriptor(unsigned ID) {
   // Chained PCH are not suported.
   if (ModuleMgr.size() == 1) {
     ModuleFile &MF = ModuleMgr.getPrimaryModule();
-    return ASTReader::ASTSourceDescriptor(
-        MF.OriginalSourceFileName, MF.OriginalDir, MF.FileName, MF.Signature);
+    StringRef ModuleName = llvm::sys::path::filename(MF.OriginalSourceFileName);
+    return ASTReader::ASTSourceDescriptor(ModuleName, MF.OriginalDir,
+                                          MF.FileName, MF.Signature);
   }
   return None;
 }