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[Bug rtl-optimization/17236] inefficient code for long long multiply on x86
- From: "bonzini at gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 18 Dec 2007 08:05:39 -0000
- Subject: [Bug rtl-optimization/17236] inefficient code for long long multiply on x86
- References: <bug-17236-1008@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #9 from bonzini at gnu dot org 2007-12-18 08:05 -------
Uros mentioned offlist that he wanted to hijack fwprop to always propagate
stack slots into instructions.
It would be a relatively useful piece of infrastructure to have a flag in MEMs
that marks on-stack MEMs, because other MEMs definitely must not be propagated
blindly.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17236