https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94166
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This fixes it, but will try to find a testcase that fails more reliably:
--- gcc/tree-ssa-reassoc.c.jj 2020-01-12 11:54:38.510381771 +0100
+++ gcc/tree-ssa-reassoc.c 2020-03-13 14:06:32.358085863 +0100
@@ -1793,8 +1793,11 @@ sort_by_mach_mode (const void *p_i, cons
return 1;
else if (mode1 < mode2)
return -1;
- else
- return 0;
+ if (SSA_NAME_VERSION (tr1) < SSA_NAME_VERSION (tr2))
+ return -1;
+ else if (SSA_NAME_VERSION (tr1) > SSA_NAME_VERSION (tr2))
+ return 1;
+ return 0;
}
/* Cleanup hash map for VECTOR information. */
