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From: "hjl at lucon dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/17387] Redundant instructions in loop optimization
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------- 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.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17387