[Bug tree-optimization/119287] [15 regression] ICE when building linux-6.12.19 (error: type mismatch in binary expression) since r15-8025

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119287

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
tree_nop_conversion_p certainly doesn't imply the two types are compatible
types.
So, I think we should go with
--- gcc/match.pd.jj     2025-03-13 14:05:09.689017389 +0100
+++ gcc/match.pd        2025-03-14 12:13:02.563169756 +0100
@@ -5284,7 +5284,7 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
         || tree_int_cst_sgn (@2) >= 0)
        && wi::to_wide (@3) == wi::set_bit_in_zero (shift, prec))
     (with { auto mask = wide_int::from (wi::to_wide (@2), prec, UNSIGNED); }
-     (bit_and @0 { wide_int_to_tree (type, mask << shift); }))))))
+     (bit_and (convert @0) { wide_int_to_tree (type, mask << shift); }))))))

 /* ~(~X >> Y) -> X >> Y (for arithmetic shift).  */
 (simplify