[Bug tree-optimization/98552] Make more use of __builtin_undefined for assuring that variables do not change

2021-12-23 Thread pinskia at gcc dot gnu.org via Gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98552 Andrew Pinski changed: What|Removed |Added Ever confirmed|0 |1 Status|UNCONFIRMED

[Bug tree-optimization/98552] Make more use of __builtin_undefined for assuring that variables do not change

2021-01-09 Thread tkoenig at gcc dot gnu.org via Gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98552 --- Comment #4 from Thomas Koenig --- Yes, I think that translating a DO loop into something like int i; for (i=0; i

[Bug tree-optimization/98552] Make more use of __builtin_undefined for assuring that variables do not change

2021-01-06 Thread tobi at gcc dot gnu.org via Gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98552 --- Comment #3 from Tobias Schlüter --- Don't ask how long I'd been staring at the assembly in disbelief until I figured out what had gone wrong :-) In this particular case the problem can be addressed by passing into the function instead of ,

[Bug tree-optimization/98552] Make more use of __builtin_undefined for assuring that variables do not change

2021-01-06 Thread tkoenig at gcc dot gnu.org via Gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98552 --- Comment #2 from Thomas Koenig --- (In reply to Tobias Schlüter from comment #1) > There's a typo in the example, /= instead of !=. Fixed example below: The disease of a Fortran programmer writing C, I guess :-)

[Bug tree-optimization/98552] Make more use of __builtin_undefined for assuring that variables do not change

2021-01-05 Thread tobi at gcc dot gnu.org via Gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98552 Tobias Schlüter changed: What|Removed |Added CC||tobi at gcc dot gnu.org --- Comment

[Bug tree-optimization/98552] Make more use of __builtin_undefined for assuring that variables do not change

2021-01-05 Thread tkoenig at gcc dot gnu.org via Gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98552 Thomas Koenig changed: What|Removed |Added Version|unknown |11.0 Keywords|