[LLVMbugs] [Bug 1653] New: Obj-C NSString crash in front end of LLVM-GCC 4.2/ arm-apple-darwin

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=1653

           Summary: Obj-C NSString crash in front end of LLVM-GCC 4.2/arm-
                    apple-darwin
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: nightwatch41 at gmail.com
                CC: llvmbugs at cs.uiuc.edu


The following code causes a segfault in the front-end of LLVM-GCC 4.2, target
arm-apple-darwin.

-----

#import <Foundation/Foundation.h>

@interface FooApp : NSObject

@end

@implementation FooApp

- (void)foo
{
    NSLog(@"foo");
    NSLog(@"bar"); 
}

@end

-----

The call frame traceback is as follows:

#0  emit_global_to_llvm (decl=0x1925720) at
../../llvm-gcc-iphone/gcc/llvm-backend.cpp:860
#1  0x002c5e45 in DefaultABI<(anonymous
namespace)::FunctionPrologArgumentConversion>::HandleArgument () at
../../llvm-gcc-iphone/gcc/llvm-convert.cpp:4725
#2  0x002cbbd9 in TreeToLLVM::EmitLV (this=0xbffff0c4, exp=0x1925720) at
../../llvm-gcc-iphone/gcc/llvm-convert.cpp:1001
#3  0x002cc2e8 in TreeToLLVM::EmitADDR_EXPR (this=0xbffff0c4, exp=0x14efd80) at
../../llvm-gcc-iphone/gcc/llvm-convert.cpp:2086
#4  0x002cd045 in TreeToLLVM::Emit (this=0xbffff0c4, exp=0x14efd80,
DestLoc=0x0) at ../../llvm-gcc-iphone/gcc/llvm-convert.cpp:858
#5  0x002d7e89 in TreeToLLVM::EmitNOP_EXPR (this=0xbffff0c4, exp=0x14efe10,
DestLoc=0x0) at ../../llvm-gcc-iphone/gcc/llvm-convert.cpp:2568
#6  0x002ccffb in TreeToLLVM::Emit (this=0xbffff0c4, exp=0x14efe10,
DestLoc=0x0) at ../../llvm-gcc-iphone/gcc/llvm-convert.cpp:865
#7  0x002de909 in TreeToLLVM::EmitMODIFY_EXPR (this=0xbffff0c4, exp=0x14efed0,
DestLoc=0x0) at ../../llvm-gcc-iphone/gcc/llvm-convert.cpp:2456
#8  0x002ccbb8 in TreeToLLVM::Emit (this=0xbffff0c4, exp=0x14efed0,
DestLoc=0x0) at ../../llvm-gcc-iphone/gcc/llvm-convert.cpp:860
#9  0x002df4e5 in TreeToLLVM::EmitFunction (this=0xbffff0c4) at
../../llvm-gcc-iphone/gcc/llvm-convert.cpp:791
#10 0x002bb70b in llvm_emit_code_for_current_function (fndecl=0x18c7c00) at
../../llvm-gcc-iphone/gcc/llvm-backend.cpp:574
#11 0x0008af1d in tree_rest_of_compilation (fndecl=0x18c7c00) at
../../llvm-gcc-iphone/gcc/tree-optimize.c:476
#12 0x0002a1e2 in c_expand_body (fndecl=0x18c7c00) at
../../llvm-gcc-iphone/gcc/c-decl.c:7133
#13 0x0030a732 in cgraph_expand_function (node=0x191d3f0) at
../../llvm-gcc-iphone/gcc/cgraphunit.c:1305
#14 0x0030c3b2 in cgraph_assemble_pending_functions () at
../../llvm-gcc-iphone/gcc/cgraphunit.c:376
#15 0x0030c0a3 in cgraph_finalize_function (decl=0x18c7c00, nested=0) at
../../llvm-gcc-iphone/gcc/cgraphunit.c:511
#16 0x0002a571 in finish_function () at ../../llvm-gcc-iphone/gcc/c-decl.c:7102
#17 0x00010bd0 in objc_finish_method_definition (fndecl=0x18c7c00) at
../../llvm-gcc-iphone/gcc/objc/objc-act.c:17246
#18 0x0007180a in c_parser_external_declaration (parser=0x4260d0c0) at
../../llvm-gcc-iphone/gcc/c-parser.c:6728
#19 0x0007219b in c_parse_file () at ../../llvm-gcc-iphone/gcc/c-parser.c:1217
#20 0x0005c10b in c_common_parse_file (set_yydebug=0) at
../../llvm-gcc-iphone/gcc/c-opts.c:1290
#21 0x00279e3b in do_compile () at ../../llvm-gcc-iphone/gcc/toplev.c:1134
#22 0x0027a8ec in toplev_main (argc=15, argv=0xbffff464) at
../../llvm-gcc-iphone/gcc/toplev.c:2288
#23 0x00001e72 in _start ()
#24 0x00001d99 in start ()

-Patrick


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