[Bug c/104427] New: [12 Regression] ICE in gimplify_expr, at gimplify.cc:15759

[gscfq--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104427

            Bug ID: 104427
           Summary: [12 Regression] ICE in gimplify_expr, at
                    gimplify.cc:15759
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gs...@t-online.de
  Target Milestone: ---

Started between 20211114 and 20211121 :


$ cat z1.c
_Float16 x, y;
int foo()
{
  return __builtin_assoc_barrier(x + y) - y;
}


$ gcc-12-20220206 -c z1.c
z1.c:4:36: internal compiler error: in gimplify_expr, at gimplify.cc:15759
    4 |   return __builtin_assoc_barrier(x + y) - y;
      |                                  ~~^~~
0xac934a gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.cc:15759
0xac70cb gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.cc:15720
0xac43ca gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.cc:15066
0xac3f9d gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.cc:15729
0xac9c78 gimplify_stmt(tree_node**, gimple**)
        ../../gcc/gimplify.cc:7035
0xac57ee gimplify_and_add(tree_node*, gimple**)
        ../../gcc/gimplify.cc:495
0xac57ee gimplify_return_expr
        ../../gcc/gimplify.cc:1677
0xac57ee gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.cc:15225
0xac9c78 gimplify_stmt(tree_node**, gimple**)
        ../../gcc/gimplify.cc:7035
0xaca603 gimplify_bind_expr
        ../../gcc/gimplify.cc:1427
0xac5f8a gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.cc:15164
0xac9c78 gimplify_stmt(tree_node**, gimple**)
        ../../gcc/gimplify.cc:7035
0xacb85e gimplify_body(tree_node*, bool)
        ../../gcc/gimplify.cc:16209
0xacbe47 gimplify_function_tree(tree_node*)
        ../../gcc/gimplify.cc:16363
0x8dd527 cgraph_node::analyze()
        ../../gcc/cgraphunit.cc:675
0x8e07d6 analyze_functions
        ../../gcc/cgraphunit.cc:1240
0x8e19ad symbol_table::finalize_compilation_unit()
        ../../gcc/cgraphunit.cc:2500