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[Bug rtl-optimization/20969] unrolling does not take target register pressure into account.
- From: "steven at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 3 Aug 2005 15:49:29 -0000
- Subject: [Bug rtl-optimization/20969] unrolling does not take target register pressure into account.
- References: <20050412154215.20969.amylaar@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From steven at gcc dot gnu dot org 2005-08-03 15:49 -------
Joern wrote:
> The target register pressure is easy to calculate, and although 4.1 lacks
> infrastructure for assessment of the unroll benefit (which 3.4 has), it is
> certainly easier to add it there in the unroller than in the register
> allocator.
Could you give some specific examples of assesments that 3.4 can do and 4.1
can not?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20969