[PATCH] fix llvm linker issue with dbg.declare
Manman Ren
mren at apple.com
Tue Jan 29 14:01:01 PST 2013
ping
Thanks,
Manman
On Jan 28, 2013, at 3:21 PM, Manman Ren <mren at apple.com> wrote:
>
> Hello,
>
> Given source IR:
> call void @llvm.dbg.declare(metadata !{i32* %argc.addr}, metadata !14), !dbg !15
> we used to generate
> call void @llvm.dbg.declare(metadata !27, metadata !28), !dbg !29
> !27 = metadata !{null}
>
> With this patch, we will generate
> call void @llvm.dbg.declare(metadata !{i32* %argc.addr}, metadata !27), !dbg !28
>
> Looking up %argc.addr in ValueMap will return null. Since %argc.addr is already
> correctly set up, we can use identity mapping.
>
> Please review,
>
> Thanks,
> Manman
>
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