[Bug tree-optimization/63665] [4.8/4.9 Regression] wrong code with signed overflow even with -fwrapv

2014-11-26 Thread rguenth at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63665 --- Comment #6 from Richard Biener --- Author: rguenth Date: Wed Nov 26 11:42:44 2014 New Revision: 218078 URL: https://gcc.gnu.org/viewcvs?rev=218078&root=gcc&view=rev Log: 2014-11-26 Richard Biener Backport from mainline 2014-11-26

[Bug tree-optimization/63665] [4.8/4.9 Regression] wrong code with signed overflow even with -fwrapv

2014-10-28 Thread rguenth at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63665 --- Comment #5 from Richard Biener --- Latent issue. pr45752.c:40:3: note: Load permutation 2 2 2 2 2 3 3 3 3 3 0 0 0 0 0 1 1 1 1 1 4 4 4 4 4 We have a SLP group size of 5 and computed an unroll factor of 2 (ok). It looks to me that Index: gc

[Bug tree-optimization/63665] [4.8/4.9 Regression] wrong code with signed overflow even with -fwrapv

2014-10-28 Thread rguenth at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63665 Richard Biener changed: What|Removed |Added Known to work||5.0 Target Milestone|5.0