r249639 - Make clang_Cursor_getMangling not mangle if the declaration isn't mangled

[Ehsan Akhgari via cfe-commits]

Author: ehsan
Date: Wed Oct  7 19:01:20 2015
New Revision: 249639

URL: http://llvm.org/viewvc/llvm-project?rev=249639&view=rev
Log:
Make clang_Cursor_getMangling not mangle if the declaration isn't mangled

Right now clang_Cursor_getMangling will attempt to mangle any
declaration, even if the declaration isn't mangled (extern C).  This
results in a partially mangled name which isn't useful for much. This
patch makes clang_Cursor_getMangling return an empty string if the
declaration isn't mangled.

Patch by Michael Wu <mwu at mozilla.com>.

Modified:
    cfe/trunk/test/Index/print-mangled-name.cpp
    cfe/trunk/tools/c-index-test/c-index-test.c
    cfe/trunk/tools/libclang/CIndex.cpp

Modified: cfe/trunk/test/Index/print-mangled-name.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Index/print-mangled-name.cpp?rev=249639&r1=249638&r2=249639&view=diff
==============================================================================
--- cfe/trunk/test/Index/print-mangled-name.cpp (original)
+++ cfe/trunk/test/Index/print-mangled-name.cpp Wed Oct  7 19:01:20 2015
@@ -29,3 +29,8 @@ int foo(S, S&);
 // ITANIUM: mangled=_Z3foo1SRS_
 // MACHO: mangled=__Z3foo1SRS_
 // MICROSOFT: mangled=?foo@@YAHUS
+
+extern "C" int foo(int);
+// ITANIUM: mangled=foo
+// MACHO: mangled=_foo
+// MICROSOFT: mangled=_foo

Modified: cfe/trunk/tools/c-index-test/c-index-test.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/tools/c-index-test/c-index-test.c?rev=249639&r1=249638&r2=249639&view=diff
==============================================================================
--- cfe/trunk/tools/c-index-test/c-index-test.c (original)
+++ cfe/trunk/tools/c-index-test/c-index-test.c Wed Oct  7 19:01:20 2015
@@ -1429,6 +1429,8 @@ static enum CXChildVisitResult PrintType
 
 static enum CXChildVisitResult PrintMangledName(CXCursor cursor, CXCursor p,
                                                 CXClientData d) {
+  if (clang_isUnexposed(clang_getCursorKind(cursor)))
+    return CXChildVisit_Recurse;
   CXString MangledName;
   PrintCursor(cursor, NULL);
   MangledName = clang_Cursor_getMangling(cursor);

Modified: cfe/trunk/tools/libclang/CIndex.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/tools/libclang/CIndex.cpp?rev=249639&r1=249638&r2=249639&view=diff
==============================================================================
--- cfe/trunk/tools/libclang/CIndex.cpp (original)
+++ cfe/trunk/tools/libclang/CIndex.cpp Wed Oct  7 19:01:20 2015
@@ -3890,7 +3890,11 @@ CXString clang_Cursor_getMangling(CXCurs
 
   std::string FrontendBuf;
   llvm::raw_string_ostream FrontendBufOS(FrontendBuf);
-  MC->mangleName(ND, FrontendBufOS);
+  if (MC->shouldMangleDeclName(ND)) {
+    MC->mangleName(ND, FrontendBufOS);
+  } else {
+    ND->printName(FrontendBufOS);
+  }
 
   // Now apply backend mangling.
   std::unique_ptr<llvm::DataLayout> DL(