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[Bug target/11877] gcc should use xor trick with -Os
- From: "kazu at cs dot umass dot edu" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 25 Mar 2004 19:16:18 -0000
- Subject: [Bug target/11877] gcc should use xor trick with -Os
- References: <20030810154728.11877.debian-gcc@lists.debian.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From kazu at cs dot umass dot edu 2004-03-25 19:16 -------
Even if you split the long move in ix86_expand_move,
the constant 0 is propagated into the two moves.
I guess the right way may be uncse sometime after register allocation.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11877