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[Bug tree-optimization/42586] New: load-modify-store on x86 should be \ single instruction
- From: "andi-gcc at firstfloor dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 3 Jan 2010 08:12:54 -0000
- Subject: [Bug tree-optimization/42586] New: load-modify-store on x86 should be \ single instruction
- References: <bug-42586-7834@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #17 from andi-gcc at firstfloor dot org 2010-01-03 08:12 -------
Nope, the examples all disable frame pointer
(the first version of the tester had this problem, but that was fixed)
It's all not frame pointer set up anyways, but sub $...,%esp ... ; add
$...,%esp
with no use of the stack frame (or often even nothing at all) inbetween
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42586