[Bug target/82444] New: ICE in ira_init_register_move_cost, at ira.c:1581

["marxin at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82444

            Bug ID: 82444
           Summary: ICE in ira_init_register_move_cost, at ira.c:1581
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: vmakarov at gcc dot gnu.org
  Target Milestone: ---

This looks like a very old ICE:

$ cat /tmp/ice.i
__float128 a;
void b () { __asm__("" : "+r"(a)); }

$ gcc /tmp/ice.i -m32 -march=athlon -c
during RTL pass: ira
/tmp/ice.i: In function ‘b’:
/tmp/ice.i:2:1: internal compiler error: in ira_init_register_move_cost, at
ira.c:1581
 void b () { __asm__("" : "+r"(a)); }
 ^~~~
0xcc3f0e ira_init_register_move_cost(machine_mode)
        ../../gcc/ira.c:1581
0xcda81e ira_init_register_move_cost_if_necessary
        ../../gcc/ira-int.h:1087
0xcdc912 record_reg_classes
        ../../gcc/ira-costs.c:857
0xcde57f record_operand_costs
        ../../gcc/ira-costs.c:1342
0xcdedac scan_one_insn
        ../../gcc/ira-costs.c:1492
0xcdf499 process_bb_for_costs
        ../../gcc/ira-costs.c:1613
0xcdf4dc process_bb_node_for_costs
        ../../gcc/ira-costs.c:1625
0xcd39b5 ira_traverse_loop_tree(bool, ira_loop_tree_node*, void
(*)(ira_loop_tree_node*), void (*)(ira_loop_tree_node*))
        ../../gcc/ira-build.c:1799
0xcdf8e1 find_costs_and_classes
        ../../gcc/ira-costs.c:1709
0xce1739 ira_costs()
        ../../gcc/ira-costs.c:2250
0xcd7e84 ira_build()
        ../../gcc/ira-build.c:3420
0xcce341 ira
        ../../gcc/ira.c:5270
0xcceb84 execute
        ../../gcc/ira.c:5581