PATCH: __nodebug__ attribute for use on SSE intrinsic wrappers

[Geoffrey Keating]

Hi Fariborz,

I believe that this is best fixed by:

- Moving to DWARF
- Having Jim's patch which provides correct DWARF information for  
inline functions

The combination of these allows the user to step over these small  
inlined functions in gdb using the 'next' operation.

I don't think the problem is specific to the SSE inlined functions.   
Many other small functions also cause this UI problem, for instance C+ 
+ accessor methods.

Thus, I don't believe this patch is desirable for FSF GCC.

:REVIEWMAIL:
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