[Bug middle-end/21085] [4.0/4.1 Regression] Virtual memory exhausted with g++

pinskia at gcc dot gnu dot org gcc-bugzilla@gcc.gnu.org
Mon Apr 18 19:38:00 GMT 2005


------- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-18 19:38 -------
Most likely caused by:
2004-07-05  Roger Sayle  <roger@eyesopen.com>

        * fold-const.c (fold) <TRUNC_MOD_EXPR>: Optimize unsigned modulus
        by a power of two into a bit-wise AND, i.e. "X % C" as "X & (C-1)".
        Normalize "X % C" as "X % -C" for signed modulus and negative C.
        Optimize "X % -Y" as "X % Y" for signed modulus.
        <EQ_EXPR>: Recursively call "fold" when transforming "(X % Y) == 0"
        into "((unsigned) X % Y) == 0".

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                 CC|                            |roger at eyesopen dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21085



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