[cfe-commits] r75314 - in /cfe/trunk: include/clang/AST/ include/clang/Analysis/PathSensitive/ lib/AST/ lib/Analysis/ lib/CodeGen/ lib/Frontend/ lib/Sema/ test/CodeGenObjC/ test/PCH/ test/SemaObjC/ test/SemaObjCXX/

Fariborz Jahanian fjahanian at apple.com
Fri Jul 10 17:56:40 PDT 2009

On Jul 10, 2009, at 4:35 PM, Steve Naroff wrote:

> Author: snaroff
> Date: Fri Jul 10 18:34:53 2009
> New Revision: 75314
> URL: http://llvm.org/viewvc/llvm-project?rev=75314&view=rev
> Log:
> This patch includes a conceptually simple, but very intrusive/ 
> pervasive change.
> The idea is to segregate Objective-C "object" pointers from general  
> C pointers (utilizing the recently added ObjCObjectPointerType). The  
> fun starts in Sema::GetTypeForDeclarator(), where "SomeInterface *"  
> is now represented by a single AST node (rather than a PointerType  
> whose Pointee is an ObjCInterfaceType). Since a significant amount  
> of code assumed ObjC object pointers where based on C pointers/ 
> structs, this patch is very tedious. It should also explain why it  
> is hard to accomplish this in smaller, self-contained patches.
> This patch does most of the "heavy lifting" related to moving from  
> PointerType->ObjCObjectPointerType. It doesn't include all potential  
> "cleanups". The good news is additional cleanups can be done later  
> (some are noted in the code). This patch is so large that I didn't  
> want to include any changes that are purely aesthetic.
> By making the ObjC types truly built-in, they are much easier to  
> work with (and require fewer "hacks"). For example, there is no need  
> for ASTContext::isObjCIdStructType() or  
> ASTContext::isObjCClassStructType()! We believe this change (and the  
> follow-up cleanups) will pay dividends over time.
> Given the amount of code change, I do expect some fallout from this  
> change (though it does pass all of the clang tests). If you notice  
> any problems, please let us know asap! Thanks.

Great Steve. It sure was heck of an effort.

Started with BlastApp. It asserts in many places. A sample is:

     /Volumes/sandbox/llvm/Debug/bin/clang -x objective-c -arch x86_64  
-fmessage-length=0 -pipe -Wno-trigraphs -fpascal-strings -fasm-blocks - 
O0 -Wreturn-type -Wunused-variable -isysroot /Developer/SDKs/ 
MacOSX10.6.sdk -mfix-and-continue -fobjc-gc -mmacosx-version-min=10.6 - 
gdwarf-2 -I/Volumes/sandbox/fariborz/radars/BlastApp/build/ 
BlastApp.build/Debug/BlastApp.build/BlastApp.hmap -F/Volumes/sandbox/ 
fariborz/radars/BlastApp/build/Debug -I/Volumes/sandbox/fariborz/ 
radars/BlastApp/build/Debug/include -I/Volumes/sandbox/fariborz/radars/ 
x86_64 -I/Volumes/sandbox/fariborz/radars/BlastApp/build/ 
BlastApp.build/Debug/BlastApp.build/DerivedSources -c /Volumes/sandbox/ 
fariborz/radars/BlastApp/Game.m -o /Volumes/sandbox/fariborz/radars/ 

Assertion failed: ((isa<PointerType>(SrcTy) ==  
isa<PointerType>(DstTy)) && "BitCast cannot cast pointer to non- 
pointer and vice versa"), function getBitCast, file Constants.cpp,  
line 2231.
0   clang-cc          0x00f20b9b PrintStackTrace(void*) + 45
1   clang-cc          0x00f2110d SignalHandler(int) + 351
2   libSystem.B.dylib 0x90edeadb _sigtramp + 43
3   libSystem.B.dylib 0xffffffff _sigtramp + 1863456079
4   libSystem.B.dylib 0x90f6f7cf raise + 26
5   libSystem.B.dylib 0x90f85bcc abort + 93

- Fariborz

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