https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100162
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #2) > FRE is no longer able to optimize _7 to 2 in GCC 13+: > c[0][b.1_1] = 2; > c[1][b.1_1] = 2; > c[2][b.1_1] = 2; > c[3][b.1_1] = 2; > c[4][b.1_1] = 2; > a = 5; > _5 = b.1_1 != 0; > _6 = (int) _5; > _7 = c[0][0]; That's PR108355. The "magic" special-casing of single element arrays went away (or rather now triggers more unreliably).
