On Mon, Aug 29, 2011 at 6:43 AM, H.J. Lu <hjl.to...@gmail.com> wrote: > On Tue, May 10, 2011 at 2:55 AM, Richard Guenther <rguent...@suse.de> wrote: >> >> This moves fold-consts conversion folding to forwprop, our tree >> pattern matcher & optimizer. In addition to what fold-const >> does this makes us canonicalize unsigned truncations to use >> bitwise and of a mask, this form is more readily handled by >> passes like VRP and this also makes it easier to combine with >> existing bitwise operations (or thise I will introduce with >> bitfield lowering which this patch incidentially will be >> required for). >> >> Bootstrapped and tested on x86_64-unknown-linux-gnu, applied to trunk. >> >> Richard. >> >> 2011-05-10 Richard Guenther <rguent...@suse.de> >> >> * tree-ssa-forwprop.c (combine_conversions): Pattern-match >> a series of conversions and apply foldings similar to what >> fold-const does. >> (tree_ssa_forward_propagate_single_use_vars): Call it. >> > > This caused: > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50176 > >
This also caused: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53623 -- H.J.
