https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69489
--- Comment #7 from Andreas Schwab <sch...@linux-m68k.org> ---
The second commit triggers this ICE on ia64:
$ gcc/xgcc -Bgcc/ ../../gcc/gcc/testsuite/gcc.dg/pr70725.c -O3 -S
../../gcc/gcc/testsuite/gcc.dg/pr70725.c: In function ‘fn1’:
../../gcc/gcc/testsuite/gcc.dg/pr70725.c:13:1: internal compiler error: in
phi_convertible_by_degenerating_args, at tree-if-conv.c:605
fn1 ()
^~~
0x4000000001c26b3f phi_convertible_by_degenerating_args
../../gcc/tree-if-conv.c:605
0x4000000001c2727f if_convertible_phi_p
../../gcc/tree-if-conv.c:662
0x4000000001c3675f if_convertible_loop_p_1
../../gcc/tree-if-conv.c:1408
0x4000000001c3700f if_convertible_loop_p
../../gcc/tree-if-conv.c:1466
0x4000000001c374cf tree_if_conversion
../../gcc/tree-if-conv.c:2774
0x4000000001c37d9f execute
../../gcc/tree-if-conv.c:2875
