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[Bug rtl-optimization/17387] Redundant instructions in loop optimization
- From: "hjl at lucon dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 27 Jan 2005 04:03:48 -0000
- Subject: [Bug rtl-optimization/17387] Redundant instructions in loop optimization
- References: <20040909235415.17387.hjl@lucon.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From hjl at lucon dot org 2005-01-27 04:03 -------
Gcc doesn't know/remember
movl S(,%rax,4), %eax
will zero extend to 64bit. I don't know you can touch only the lower
32bit bits.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17387