https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68990
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think the problem is:
********** Pseudos coalescing #1: **********
Coalescing move 5:r91(91)-r103(103) (freq=1)
Removing move 5 (freq=1)
deleting insn with uid = 5.
Make unique value for inheritance r256
Make unique value for inheritance r257
Make unique value for inheritance r258
Make unique value for inheritance r259
Make unique value for inheritance r260
Make unique value for inheritance r262
Make unique value for inheritance r264
Coalesced Moves = 1
in the other spot where insn 5 is it is perhaps possible to coalesce the two
pseudos, but not at the
int m = -b;
if (m < b)
comparison, where it breaks it.
