subject:"\[Bug middle\-end\/52134\] Does not fold \(x \* 4\) \& \-4"

[Bug middle-end/52134] Does not fold (x * 4) & -4

2012-03-14 Thread rguenther at suse dot de

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52134 --- Comment #8 from rguenther at suse dot de 2012-03-14 09:39:31 UTC --- On Tue, 13 Mar 2012, pinskia at gcc dot gnu.org wrote: > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52134 > > --- Comment #6 from Andrew Pinski 2012-03-13 > 22:08:12 UT

[Bug middle-end/52134] Does not fold (x * 4) & -4

2012-03-13 Thread ebotcazou at gcc dot gnu.org

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52134 --- Comment #7 from Eric Botcazou 2012-03-13 22:17:35 UTC --- > See how the lattice's already have its last 3 bits unset. In fact I think we > should only do this in the ccp/vrp passes to remove the & rather than fold. For size calculations (TY

[Bug middle-end/52134] Does not fold (x * 4) & -4

2012-03-13 Thread pinskia at gcc dot gnu.org

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52134 --- Comment #6 from Andrew Pinski 2012-03-13 22:08:12 UTC --- CCP could also remove the &: Visiting statement: D.1713_2 = t_1(D) * 4; which is likely CONSTANT Lattice value changed to CONSTANT Lattice value changed to CONSTANT 0x0

[Bug middle-end/52134] Does not fold (x * 4) & -4

2012-03-13 Thread rguenth at gcc dot gnu.org

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52134 Richard Guenther changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|

[Bug middle-end/52134] Does not fold (x * 4) & -4

2012-03-13 Thread rguenth at gcc dot gnu.org

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52134 --- Comment #4 from Richard Guenther 2012-03-13 13:47:43 UTC --- Author: rguenth Date: Tue Mar 13 13:47:35 2012 New Revision: 185334 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=185334 Log: 2012-03-13 Richard Guenther PR middle-