gcc internals question

[Ricardo Anguiano]

Spundun Bhatt <spundun@ISI.EDU> writes:

> Hi
> 
> I have 2 questions about my gcc port to a new architecture.
> 
> when giving an rtl dump.... gcc uses symbols like mem/f mem/s... as
> in the next question's dump. What does the /s and /f mean?

See the gcc internals info page titled "Flags in an RTL Expression",
aka, (gccint) Flags:

`MEM_IN_STRUCT_P (X)'
     In `mem' expressions, nonzero for reference to an entire
     structure, union or array, or to a component of one.  Zero for
     references to a scalar variable or through a pointer to a scalar.
     If both this flag and `MEM_SCALAR_P' are clear, then we don't
     know whether this `mem' is in a structure or not.  Both flags
     should never be simultaneously set.  Stored in the `in_struct'
     field and printed as `/s'.

`MEM_SCALAR_P (X)'
     In `mem' expressions, nonzero for reference to a scalar known not
     to be a member of a structure, union, or array.  Zero for such
     references and for indirections through pointers, even pointers
     pointing to scalar types.  If both this flag and
     `MEM_IN_STRUCT_P' are clear, then we don't know whether this
     `mem' is in a structure or not.  Both flags should never be
     simultaneously set.  Stored in the `frame_related' field and
     printed as `/f'.

> My gcc is giving me ICE with an error for the following template.

I don't know how to answer this one.

-- 
Ricardo Anguiano
http://www.codesourcery.com