[LLVMbugs] [Bug 4701] New: Definitions of id and Class ignored

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=4701

           Summary: Definitions of id and Class ignored
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: csdavec at swan.ac.uk
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=3297)
 --> (http://llvm.org/bugs/attachment.cgi?id=3297)
Test case.

Accessing fields in id and Class no longer works.  Any definition of these
types in code is now completely ignored.  This breaks any code on the GNU
runtime that includes objc/objc-api.h.  

The attached file is the result of preprocessing this trivial program on a
platform with the GNU platform:

#import <objc/objc.h>

const void *testSel(SEL a)
{
    return a->sel_types;
}
const void *testClass(Class a)
{
    return a->name;
}
const void *testId(id a)
{
    return a->class_pointer;
}


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