http://llvm.org/bugs/show_bug.cgi?id=21688
Bug ID: 21688
Summary: clang objective-c++ incorrect mangling for function
with multiple id parameters
Product: clang
Version: 3.5
Hardware: Macintosh
OS: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Consider:
// mangling.cpp
struct objc_selector;
struct objc_object;
typedef struct objc_selector *SEL;
typedef struct objc_object *id;
struct NSObject;
void good1(id, id) { }
void good2(struct NSObject *, id, id) { }
void good3(struct NSObject *, SEL, id) { }
void bad1(struct NSObject *, SEL, id, id) { }
void bad2(struct NSObject *, SEL, id, id, id) { }
Compiling this code as Objective C++ generates what seems to be incorrect name
mangling for the "bad" functions:
$ clang++ -x objective-c++ -c mangling.cc && nm mangling.o | c++filt
0000000000000138 short EH_frame0
0000000000000050 T bad1(NSObject*, objc_selector*, objc_object*, objc_object)
00000000000001c8 S bad1(NSObject*, objc_selector*, objc_object*, objc_object)
(.eh)
0000000000000070 T bad2(NSObject*, objc_selector*, objc_object*, objc_object,
objc_object)
00000000000001f0 S bad2(NSObject*, objc_selector*, objc_object*, objc_object,
objc_object) (.eh)
0000000000000000 T good1(objc_object*, objc_object*)
0000000000000150 S good1(objc_object*, objc_object*) (.eh)
0000000000000010 T good2(NSObject*, objc_object*, objc_object*)
0000000000000178 S good2(NSObject*, objc_object*, objc_object*) (.eh)
0000000000000030 T good3(NSObject*, objc_selector*, objc_object*)
00000000000001a0 S good3(NSObject*, objc_selector*, objc_object*) (.eh)
Compiling as C++ generates what seems to be the correct mangling:
$ clang++ -x c++ -c mangling.cc && nm mangling.o | c++filt
0000000000000130 short EH_frame0
0000000000000050 T bad1(NSObject*, objc_selector*, objc_object*,
objc_object*)
00000000000001c0 S bad1(NSObject*, objc_selector*, objc_object*,
objc_object*) (.eh)
0000000000000070 T bad2(NSObject*, objc_selector*, objc_object*,
objc_object*, objc_object*)
00000000000001e8 S bad2(NSObject*, objc_selector*, objc_object*,
objc_object*, objc_object*) (.eh)
0000000000000000 T good1(objc_object*, objc_object*)
0000000000000148 S good1(objc_object*, objc_object*) (.eh)
0000000000000010 T good2(NSObject*, objc_object*, objc_object*)
0000000000000170 S good2(NSObject*, objc_object*, objc_object*) (.eh)
0000000000000030 T good3(NSObject*, objc_selector*, objc_object*)
0000000000000198 S good3(NSObject*, objc_selector*, objc_object*) (.eh)
My main issue here is that the mangling is inconsistent if code is compiled as
Objective-C++ or C++, which prevents using a function compiled as Objective C++
to be used in plain C++.
--
You are receiving this mail because:
You are on the CC list for the bug.
_______________________________________________
LLVMbugs mailing list
[email protected]
http://lists.cs.uiuc.edu/mailman/listinfo/llvmbugs
