https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116459
--- Comment #8 from Jonathan Wakely ---
(In reply to xiaohuba2021 from comment #0)
> struct Matrix {
> long long mat[2][2];
> Matrix() { memset(mat, 0, sizeof(mat)); }
N.B. there's no miscompilation if you change this to the more idioma
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116459
--- Comment #7 from xiaohuba2021 ---
Created attachment 58975
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58975&action=edit
The miscompiled program
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116459
--- Comment #6 from Jonathan Wakely ---
Regression started with with r12-2523 and was fixed by r13-7206, which was
backported as r12-9476.
So this is a dup of either PR ipa/107769 or PR ipa/109318.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116459
Sam James changed:
What|Removed |Added
CC||sjames at gcc dot gnu.org
--- Comment #5 fr
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116459
--- Comment #4 from xiaohuba2021 ---
Yes, it seems that only 12.1 and 12.2 are affected. But I wonder what's the
cause of it, and are there any patches for it?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116459
Richard Biener changed:
What|Removed |Added
Known to fail||12.1.0, 12.2.0
Known to work|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116459
--- Comment #2 from xiaohuba2021 ---
> Uncomment line 20 (mask = 1) or explicitly add operator= for struct Matrix
> solves this problem.
sorry, the code above produces the correct answer, since line 20 is
uncommented. Comment it and it will ou
