llvm dev - Feb 2011 - [LLVMdev] DWARF DW_AT_language in LLVM

Is there any good reason for using DW_FORM_data1 for the DW_AT_language
attribute of DW_TAG_compile_unit? This prevents using language codes in
the DW_LANG_lo_user=0x8000 to DW_LANG_hi_user=0xffff range.

I think the obvious change to use DW_FORM_data2 in line 1897 of
lib/CodeGen/AsmPrinter/DwarfDebug.cpp should fix it. Or, if there are
binary compatibility issues, the abbrev form could be chosen
conditionally. Are there?

Thanks
-Peter S. Housel-  housel at acm.org

On Wed, Feb 23, 2011 at 1:32 PM, Peter Housel <housel at acm.org> wrote:
> Is there any good reason for using DW_FORM_data1 for the DW_AT_language
> attribute of DW_TAG_compile_unit? This prevents using language codes in
> the DW_LANG_lo_user=0x8000 to DW_LANG_hi_user=0xffff range.
>
> I think the obvious change to use DW_FORM_data2 in line 1897 of
> lib/CodeGen/AsmPrinter/DwarfDebug.cpp should fix it. Or, if there are
> binary compatibility issues, the abbrev form could be chosen
> conditionally. Are there?
>
this bit be when I tried to use a language ID in the user range

>
> Thanks
> -Peter S. Housel-  housel at acm.org
>
>
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Peter,

On Feb 23, 2011, at 1:32 PM, Peter Housel wrote:
> Is there any good reason for using DW_FORM_data1 for the DW_AT_language
> attribute of DW_TAG_compile_unit? This prevents using language codes in
> the DW_LANG_lo_user=0x8000 to DW_LANG_hi_user=0xffff range.
> 
> I think the obvious change to use DW_FORM_data2 in line 1897 of
> lib/CodeGen/AsmPrinter/DwarfDebug.cpp should fix it. Or, if there are
> binary compatibility issues, the abbrev form could be chosen
> conditionally. Are there?
I do not see any binary compatibility issue. In any case, if there are any
I'd learn them about soon! Checked in change to use DW_FORM_data2. r126339.

I am curious, what is your source language ?
-
Devang

On Wed, 2011-02-23 at 14:42 -0800, Devang Patel wrote:
> > I think the obvious change to use DW_FORM_data2 in line 1897 of
> > lib/CodeGen/AsmPrinter/DwarfDebug.cpp should fix it. Or, if there are
> > binary compatibility issues, the abbrev form could be chosen
> > conditionally. Are there?
> 
> I do not see any binary compatibility issue. In any case, if there are
> any I'd learn them about soon! Checked in change to use DW_FORM_data2.
r126339.
Thanks!
> I am curious, what is your source language ?
Dylan, generated using the Open Dylan compiler.

-Peter-