llvm dev - Sep 2010 - [LLVMdev] MCSymbol and DebugLoc

Hi all,

When emitting GC information, it can be very useful to emit the debug
location of a GC point, represented as a MCSymbol. Infortunately I haven't
found any API (JIT and codegen) where I can get from a MCSymbol to a
DebugLoc. Does that interface exist? If not, I plan on committing  a small
change in the GC code where the debug location is passed to the constructor
of a GC point. Patch attached.

Cheers,
Nicolas
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On Sep 12, 2010, at 9:44 AM, nicolas geoffray wrote:
> Hi all,
> 
> When emitting GC information, it can be very useful to emit the debug
location of a GC point, represented as a MCSymbol. Infortunately I haven't
found any API (JIT and codegen) where I can get from a MCSymbol to a DebugLoc.
Does that interface exist? If not, I plan on committing  a small change in the
GC code where the debug location is passed to the constructor of a GC point.
Patch attached.
I do not know anything about GC support,  however labels do not have location
info but you may be able to use location of  the first instruction after a
label. Variables' debug info is handled separately.
-
Devang

Hi Devang,

On Mon, Sep 13, 2010 at 7:53 PM, Devang Patel <dpatel at apple.com>
wrote:
>
>
> I do not know anything about GC support,  however labels do not have
> location info but you may be able to use location of  the first instruction
> after a label. Variables' debug info is handled separately.
>
I think that could work. Where is the API to get the first instruction after
a label?

Thanks,
Nicolas

> -
> Devang
>
>
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