[Bug middle-end/95903] gcc 10: wrong code with -fwrapv

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95903 Jakub Jelinek changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|---

[Bug middle-end/95903] gcc 10: wrong code with -fwrapv

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95903 --- Comment #12 from CVS Commits --- The releases/gcc-9 branch has been updated by Jakub Jelinek : https://gcc.gnu.org/g:a1eb6e41832816b671d3b945014f7e8255167470 commit r9-8902-ga1eb6e41832816b671d3b945014f7e8255167470 Author: Jakub Jelinek Da

[Bug middle-end/95903] gcc 10: wrong code with -fwrapv

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95903 --- Comment #11 from CVS Commits --- The releases/gcc-10 branch has been updated by Jakub Jelinek : https://gcc.gnu.org/g:e29959c5fcd6c37b426c2939d7ba0c199b40d1ac commit r10-8384-ge29959c5fcd6c37b426c2939d7ba0c199b40d1ac Author: Jakub Jelinek

[Bug middle-end/95903] gcc 10: wrong code with -fwrapv

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95903 --- Comment #10 from CVS Commits --- The master branch has been updated by Jakub Jelinek : https://gcc.gnu.org/g:37995960984ea346dd9d168d332cd6f7adf0 commit r11-1685-g37995960984ea346dd9d168d332cd6f7adf0 Author: Jakub Jelinek Date: S

[Bug middle-end/95903] gcc 10: wrong code with -fwrapv

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95903 --- Comment #9 from Markus F.X.J. Oberhumer --- [ Just for reference, created bug 95908 ]

[Bug middle-end/95903] gcc 10: wrong code with -fwrapv

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95903 --- Comment #8 from Markus F.X.J. Oberhumer --- Got it, thanks!

[Bug middle-end/95903] gcc 10: wrong code with -fwrapv

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95903 --- Comment #7 from Jakub Jelinek --- I believe all arrays larger than half of the address space are outside of the standard already, one can't perform e.g. address arithmetics on those because it overflows the ptrdiff_t in which it is evaluated.

[Bug middle-end/95903] gcc 10: wrong code with -fwrapv

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95903 --- Comment #6 from Markus F.X.J. Oberhumer --- Thanks for the quick fix! And no need to be grumpy, I'm just trying to nail down those pesky edge cases... As for ILP32, here is another suspicious test case, now only using just a little bit more

[Bug middle-end/95903] gcc 10: wrong code with -fwrapv

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95903 --- Comment #5 from Jakub Jelinek --- Created attachment 48788 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48788&action=edit gcc11-pr95903.patch Untested fix. I don't really care what clang generates or what you find expected on ilp32

[Bug middle-end/95903] gcc 10: wrong code with -fwrapv

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95903 --- Comment #4 from Markus F.X.J. Oberhumer --- Yes, ilp32 might be a corner case. Still, clang-10 does create the expected code. See https://gcc.godbolt.org/z/aEokbX for clang-10 -target arm64_32-ios -O2 -fomit-frame-pointer -fwrapv and

[Bug middle-end/95903] gcc 10: wrong code with -fwrapv

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95903 --- Comment #3 from Jakub Jelinek --- For ilp32 I'm not convinced it is a bug, the address space needs to be 32-bit only and for this to cause problems, you need a 4GB+ element array with the pointer pointing into the middle of it such that both

[Bug middle-end/95903] gcc 10: wrong code with -fwrapv

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95903 --- Comment #2 from Markus F.X.J. Oberhumer --- Somewhat related: the same code compiled with arm64-gcc -mabi=ilp32 -frwapv does miscompile *both* functions. See https://gcc.godbolt.org/z/uxDAtx Should I open a new issue for this?

[Bug middle-end/95903] gcc 10: wrong code with -fwrapv

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95903 Jakub Jelinek changed: What|Removed |Added CC||jakub at gcc dot gnu.org Last reconfir