[Bug middle-end/63568] Missed optimization (a & ~mask) | (b & mask) = a ^ ((a ^ b) & mask)
mpolacek at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Wed Dec 17 11:49:00 GMT 2014
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63568
--- Comment #9 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Dec 17 11:48:33 2014
New Revision: 218816
URL: https://gcc.gnu.org/viewcvs?rev=218816&root=gcc&view=rev
Log:
PR middle-end/63568
* match.pd: Add (x & ~m) | (y & m) -> ((x ^ y) & m) ^ x pattern.
* gcc.dg/pr63568.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr63568.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog
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