[LLVMdev] Debug information and JIT (original) (raw)

Eric Christopher echristo at apple.com
Fri Jul 27 10:47:49 PDT 2012

On Jul 27, 2012, at 8:41 AM, Paweł Bylica <chfast at gmail.com> wrote:

Thanks for suggestion. Unfortunately, I can't check it now as MCJIT does not work with my project at the moment.

I have found a simple example in C that causes the crash: int main() { goto L; L: int a = 0; return 0; } What is compiled to: define i32 @main() nounwind { entry: %retval = alloca i32, align 4 %a = alloca i32, align 4 store i32 0, i32* %retval br label %L, !dbg !12 L: ; preds = %entry call void @llvm.dbg.declare(metadata !{i32* %a}, metadata !14), !dbg !15 store i32 0, i32* %a, align 4, !dbg !16 ret i32 0, !dbg !17 } The problem is with @llvm.dbg.declare which is the first instruction of the block. I reproduced the crash with lli on win32 and mingw32 but not on linux64.

Probably the easiest thing to do here would be to avoid compiling your module with debug information?

-eric

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