------- Comment #4 from rguenth at gcc dot gnu dot org 2007-12-04 20:29 -------
We endlessly recurse folding
Breakpoint 3, fold_binary (code=BIT_IOR_EXPR, type=0xb7c9a2d8, op0=0xb700a2ac,
op1=0xb7d142f4) at /home/richard/src/trunk/gcc/fold-const.c:9397
9397 enum tree_code_class kind = TREE_CODE_CLASS (code);
color_rgb << 8 & 65535
255
very likely caused by
2007-12-03 Jakub Jelinek <[EMAIL PROTECTED]>
PR middle-end/29749
* fold-const.c (fold_binary) <case BIT_AND_EXPR>: Optimize
(X << C1) & C2 into (X << C1) & (C2 | ((1 << C1) - 1))
and (X >> C1) & C2 into (X >> C1) & (C2 | ~((type) -1 >> C1)).
(fold_binary) <case LSHIFT_EXPR, case RSHIFT_EXPR>: Optimize
(X & C2) << C1 into (X << C1) & (C2 << C1) and
(X & C2) >> C1 into (X >> C1) & (C2 >> C1) if that allows further
optimizations.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu dot org
OtherBugsDependingO| |29749
nThis| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34337
