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Re: Target specific memory attributes from RTL
- From: Balaji S <sivanbalaji at acmet dot com>
- To: James E Wilson <wilson at specifixinc dot com>
- Cc: gcc at gcc dot gnu dot org
- Date: Sat, 12 Mar 2005 12:53:48 +0530
- Subject: Re: Target specific memory attributes from RTL
- Organization: Acme Technologies Pvt. Ltd.
- References: <4226A13F.509@acmet.com> <4230B99F.7000109@specifixinc.com>
_On 11-Mar-2005 02:48, James E Wilson san wrote_:
Note that in this case finding the target means indirecting through a
memory address, and hence we would have to track the attributes of all
memory locations which is a difficult and perhaps unsolvable problem.
As I said before, I think what you are trying to do is fundamentally
flawed. If you need attributes, you use them when generating RTL, not
when optimizing or emitting RTL.
Is expression evaluation (expr.c, expand_expr_real) converting tree into RTL, the right place to extend GCC as required?
I am planning to extend memory attributes (rtl.h, mem_attrs) with one more tree node to have type declaration of this memory.
Please correct me if i am wrong and give me the areas to be handled carefully while doing this.
Thanks in advance,
Balaji Sivan