[Bug tree-optimization/58180] New: [4.9 regression] ICE in obj_type_ref_class, at tree.c:11876

[schwab@linux-m68k.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58180

            Bug ID: 58180
           Summary: [4.9 regression] ICE in obj_type_ref_class, at
                    tree.c:11876
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Keywords: build, ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
                CC: jh at suse dot cz
            Target: m68k-*-*

Broken by r201789.

libtool: compile:  /daten/aranym/gcc/test/./gcc/xgcc
-B/daten/aranym/gcc/test/./gcc/ -B/daten/cross/m68k-linux/m68k-linux/bin/
-B/daten/cross/m68k-linux/m68k-linux/lib/ -isystem
/daten/cross/m68k-linux/m68k-linux/include -isystem
/daten/cross/m68k-linux/m68k-linux/sys-include
/daten/aranym/gcc/gcc/libobjc/accessors.m -c -I.
-I/daten/aranym/gcc/gcc/libobjc -O2 -g -W -Wall -Wwrite-strings
-Wstrict-prototypes -DIN_GCC -DIN_TARGET_LIBS -fno-strict-aliasing -fexceptions
-I/daten/aranym/gcc/gcc/libobjc/../gcc
-I/daten/aranym/gcc/gcc/libobjc/../gcc/config -I../.././gcc
-I/daten/aranym/gcc/gcc/libobjc/../libgcc -I../libgcc
-I/daten/aranym/gcc/gcc/libobjc/../include -fgnu-runtime  -fPIC -DPIC -o
.libs/accessors.o
/daten/aranym/gcc/gcc/libobjc/accessors.m: In function ‘objc_getProperty’:
/daten/aranym/gcc/gcc/libobjc/accessors.m:127:11: internal compiler error: in
obj_type_ref_class, at tree.c:11876
    result = RETAIN (*(pointer_to_ivar));
           ^
0xb27f56 obj_type_ref_class(tree_node*)
        ../../gcc/gcc/tree.c:11876

(gdb) p ref@entry
$2 = (tree) 0x7ffff6b765a0
(gdb) pt
warning: Expression is not an assignment (and might have no effect)
 <obj_type_ref 0x7ffff6b765a0
    type <pointer_type 0x7ffff6b7d1f8
        type <function_type 0x7ffff6b7d150 type <pointer_type 0x7ffff6aded20
id>
            HI
            size <integer_cst 0x7ffff6a26cc0 constant 16>
            unit size <integer_cst 0x7ffff6a26ce0 constant 2>
            align 16 symtab 0 alias set -1 canonical type 0x7ffff6b7d150
            arg-types <tree_list 0x7ffff6b7b438 value <pointer_type
0x7ffff6aded20 id>
                chain <tree_list 0x7ffff6b7b410 value <pointer_type
0x7ffff6b08738>
                    chain <tree_list 0x7ffff6a2d988 value <void_type
0x7ffff6a35bd0 void>>>>
            pointer_to_this <pointer_type 0x7ffff6b7d1f8>>
        unsigned SI
        size <integer_cst 0x7ffff6a26a00 constant 32>
        unit size <integer_cst 0x7ffff6a26a20 constant 4>
        align 16 symtab 0 alias set -1 canonical type 0x7ffff6b7d1f8>

    arg 0 <var_decl 0x7ffff6b85be0 D.2024
        type <pointer_type 0x7ffff6b08888 type <function_type 0x7ffff6b087e0>
            unsigned SI size <integer_cst 0x7ffff6a26a00 32> unit size
<integer_cst 0x7ffff6a26a20 4>
            align 16 symtab 0 alias set -1 canonical type 0x7ffff6b08888>
        used unsigned ignored SI file /daten/aranym/gcc/gcc/libobjc/accessors.m
line 127 col 4 size <integer_cst 0x7ffff6a26a00 32> unit size <integer_cst
0x7ffff6a26a20 4>
        align 16 context <function_decl 0x7ffff6b77600 objc_getProperty>
        chain <var_decl 0x7ffff6b85b48 D.2023 type <pointer_type 0x7ffff6aded20
id>
            used unsigned ignored SI file
/daten/aranym/gcc/gcc/libobjc/accessors.m line 127 col 4 size <integer_cst
0x7ffff6a26a00 32> unit size <integer_cst 0x7ffff6a26a20 4>
            align 16 context <function_decl 0x7ffff6b77600 objc_getProperty>
chain <var_decl 0x7ffff6b85ab0 D.2022>>> arg 1 <var_decl 0x7ffff6b85b48 D.2023>
    arg 2 <integer_cst 0x7ffff6a26a40 type <integer_type 0x7ffff6a35000
sizetype> constant 0>>