https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116200
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
On x86_64 we are crashing on:
=> 0x0000000000a01bb6 <+2278>: mov 0x2612db0(,%rax,8),%rdx
(insn:TI 1615 3377 1617 104 (set (reg:DI 0 ax [690])
(zero_extend:DI (reg:SI 2 cx [681])))
"/home/apinski/src/upstream-gcc-isel/gcc/gcc/fortran/module.cc":6796:6 168
{*zero_extendsidi2}
(nil))
(insn:TI 1617 1615 5449 104 (set (reg:DI 1 dx [691])
(mem/u/c:DI (plus:DI (ashift:DI (reg:DI 0 ax [690])
(const_int 3 [0x3]))
(label_ref:DI 1620)) [0 S8 A8]))
"/home/apinski/src/upstream-gcc-isel/gcc/gcc/fortran/module.cc":6796:6 88
{*movdi_internal}
(expr_list:REG_DEAD (reg:DI 0 ax [690])
rax here is -9 .
This was pulled out before the comparison to make sure eax/ecx is range of
[0..2]:
(insn:TI 1613 4828 1614 105 (set (reg:CC 17 flags)
(compare:CC (reg:SI 2 cx [681])
(const_int 2 [0x2])))
"/home/apinski/src/upstream-gcc-isel/gcc/gcc/fortran/module.cc":6796:6 15
{*cmpsi_1}
(nil))
(jump_insn 1614 1613 3282 105 (set (pc)
(if_then_else (gtu (reg:CC 17 flags)
(const_int 0 [0]))
(label_ref 1986)
(pc)))
"/home/apinski/src/upstream-gcc-isel/gcc/gcc/fortran/module.cc":6796:6 1246
{*jcc}
(expr_list:REG_DEAD (reg:CC 17 flags)
(int_list:REG_BR_PROB 5572 (nil)))
-> 1986)
