[Bug middle-end/81931] [8 regression] r251260 breaks many tests on powerpc64

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81931 --- Comment #15 from Aldy Hernandez --- Author: aldyh Date: Wed Sep 13 17:25:49 2017 New Revision: 252557 URL: https://gcc.gnu.org/viewcvs?rev=252557=gcc=rev Log: PR middle-end/81931 * tree-ssanames.c (get_nonzero_bits): Use

[Bug middle-end/81931] [8 regression] r251260 breaks many tests on powerpc64

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81931 nsz at gcc dot gnu.org changed: What|Removed |Added CC||nsz at gcc dot gnu.org ---

[Bug middle-end/81931] [8 regression] r251260 breaks many tests on powerpc64

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81931 Markus Trippelsdorf changed: What|Removed |Added Status|NEW |RESOLVED Resolution|---

[Bug middle-end/81931] [8 regression] r251260 breaks many tests on powerpc64

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81931 --- Comment #12 from Aldy Hernandez --- Author: aldyh Date: Thu Aug 24 11:42:24 2017 New Revision: 251329 URL: https://gcc.gnu.org/viewcvs?rev=251329=gcc=rev Log: Port from mainline: 2017-08-24 Aldy Hernandez PR

[Bug middle-end/81931] [8 regression] r251260 breaks many tests on powerpc64

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81931 --- Comment #11 from Aldy Hernandez --- Author: aldyh Date: Thu Aug 24 11:40:55 2017 New Revision: 251328 URL: https://gcc.gnu.org/viewcvs?rev=251328=gcc=rev Log: PR middle-end/81931 * tree-ssanames.c (get_nonzero_bits): Use

[Bug middle-end/81931] [8 regression] r251260 breaks many tests on powerpc64

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81931 --- Comment #10 from Segher Boessenkool --- (In reply to Aldy Hernandez from comment #9) > (In reply to Richard Biener from comment #7) > Fixes testcase. Untested otherwise. > > diff --git a/gcc/tree-ssanames.c b/gcc/tree-ssanames.c > index

[Bug middle-end/81931] [8 regression] r251260 breaks many tests on powerpc64

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81931 --- Comment #9 from Aldy Hernandez --- (In reply to Richard Biener from comment #7) > I suppose the idea was to make nonzero_bits foolproof. And -1 being > sign-extended should be fine... unless precision is 0 ;) > > So, in nonzero_bits use

[Bug middle-end/81931] [8 regression] r251260 breaks many tests on powerpc64

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81931 --- Comment #8 from Aldy Hernandez --- FWIW, the reason a cross x86-64 to ppc64 doesn't exhibit the problem may be because wi::shwi (-1, precision) calls sext_hwi() which eventually shifts left by 64 bits: int shift =

[Bug middle-end/81931] [8 regression] r251260 breaks many tests on powerpc64

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81931 --- Comment #7 from Richard Biener --- (In reply to Aldy Hernandez from comment #6) > The problem here is that get_nonzero_bits() is being called with an SSA > whose precision is 0 (_Complex float). This is causing this code in >

[Bug middle-end/81931] [8 regression] r251260 breaks many tests on powerpc64

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81931 --- Comment #6 from Aldy Hernandez --- The problem here is that get_nonzero_bits() is being called with an SSA whose precision is 0 (_Complex float). This is causing this code in get_nonzero_bits(): range_info_def *ri = SSA_NAME_RANGE_INFO

[Bug middle-end/81931] [8 regression] r251260 breaks many tests on powerpc64

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81931 --- Comment #5 from Segher Boessenkool --- Confirmed with that testcase, thanks!

[Bug middle-end/81931] [8 regression] r251260 breaks many tests on powerpc64

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81931 --- Comment #4 from Aldy Hernandez --- On gcc110.fsffrance.org, I see gcc.dg/atomic/c11-atomic-exec-1.c failing with an execution error with a simple stage1 compiler. Perhaps this is a different problem, but it can be distilled to: int main

[Bug middle-end/81931] [8 regression] r251260 breaks many tests on powerpc64

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81931 Richard Biener changed: What|Removed |Added CC||trippels at gcc dot gnu.org ---

[Bug middle-end/81931] [8 regression] r251260 breaks many tests on powerpc64

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81931 Richard Biener changed: What|Removed |Added Keywords||wrong-code Component|other