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[Bug target/43902] suboptimal MIPS widening multiply accumulate
- From: "wilson at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 25 May 2010 06:35:48 -0000
- Subject: [Bug target/43902] suboptimal MIPS widening multiply accumulate
- References: <bug-43902-338@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #6 from wilson at gcc dot gnu dot org 2010-05-25 06:35 -------
Created an attachment (id=20739)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20739&action=view)
second patch attempt, modifying widen_mult tree pass
This removes about 100 lines from expr.c, and adds about 90 lines to
tree-ssa-math, plus unfortunately infrastructure for the new tree codes
WIDEN_MULT_{PLUS,MINUS}_EXPR which is about 70 lines. It works for simple
testcases. Needs a more thorough test.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43902