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[Bug tree-optimization/18463] [4.0 Regression] Moving floating point through an integer register
- From: "rakdver at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 26 Nov 2004 08:12:38 -0000
- Subject: [Bug tree-optimization/18463] [4.0 Regression] Moving floating point through an integer register
- References: <20041113170938.18463.steven@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From rakdver at gcc dot gnu dot org 2004-11-26 08:12 -------
The problem indeed is ivopts - dom interaction. Ivopts decide that since
reg + 4 * reg is a cheap addressing mode, there is no reason to do anything
else than what it does. To cure this we need to be able to allow ivopts
to express more clearly that it does not want an expression to be played with;
I think the best solution is to have a tree code that would map directly to the
memory access (including the addressing mode). I am working on the patch.
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What |Removed |Added
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AssignedTo|unassigned at gcc dot gnu |rakdver at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18463