* [tree-ssa] Array accesses
[not found] ` <1028034311.2966.12.camel@frodo>
@ 2002-07-31 22:42 ` Pop Sébastian
2002-08-06 16:13 ` Jason Merrill
0 siblings, 1 reply; 2+ messages in thread
From: Pop Sébastian @ 2002-07-31 22:42 UTC (permalink / raw)
To: Diego Novillo; +Cc: gcc
On Tue, Jul 30, 2002 at 09:05:11AM -0400, Diego Novillo wrote:
> The problem is pointer arithmetic. The parser turns offsets into byte offsets.
Sorry for redundancies, but I'd like to reiterate my question:
is this a bug in the parser (that should be fixed)?
http://gcc.gnu.org/ml/gcc-patches/2002-06/msg01488.html
I think that it would be simpler to deal with exact array accessors
rather than pointer arithmetics in the optimizer.
A possible work-around solution is to work with byte offsets and expect the analyzer
to promote them into higher structures (arrays with array accessors) for those that
are candidates for optimization.
-- Sebastian
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [tree-ssa] Array accesses
2002-07-31 22:42 ` [tree-ssa] Array accesses Pop Sébastian
@ 2002-08-06 16:13 ` Jason Merrill
0 siblings, 0 replies; 2+ messages in thread
From: Jason Merrill @ 2002-08-06 16:13 UTC (permalink / raw)
To: Pop Sébastian; +Cc: Diego Novillo, gcc
On Thu, 1 Aug 2002 00:37:35 +0200, =?iso-8859-1?Q?Pop_S=E9bastian?= <pop@gauvain.u-strasbg.fr> wrote:
> On Tue, Jul 30, 2002 at 09:05:11AM -0400, Diego Novillo wrote:
>> The problem is pointer arithmetic. The parser turns offsets into byte offsets.
>
> I think that it would be simpler to deal with exact array accessors
> rather than pointer arithmetics in the optimizer.
I would think so. I don't know why we decompose array refs so soon when
we're indexing off anything other than a decl with ARRAY_TYPE.
Jason
^ permalink raw reply [flat|nested] 2+ messages in thread
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[not found] ` <1028034311.2966.12.camel@frodo>
2002-07-31 22:42 ` [tree-ssa] Array accesses Pop Sébastian
2002-08-06 16:13 ` Jason Merrill
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