[Bug tree-optimization/53645] Missed optimization for vector integer division lowering

[ubizjak at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53645

Uros Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
                 CC|                            |ubizjak at gmail dot com
         Resolution|FIXED                       |

--- Comment #9 from Uros Bizjak <ubizjak at gmail dot com> 2012-07-01 10:23:58 UTC ---
Compilation of pr53645.c testcase ICEs with -mno-sse4:

[uros@localhost execute]$ ~/gcc-build/gcc/cc1 -O2 -mno-sse4 -quiet pr53645.c
pr53645.c: In function ‘uq3333’:
pr53645.c:11:11: internal compiler error: in expand_expr_real_2, at expr.c:8971
   *x = *y / ((UV) { a, b, c, d }); \
           ^
pr53645.c:35:1: note: in expansion of macro 'TEST'
 TEST (3, 3, 3, 3)   \
 ^
pr53645.c:40:1: note: in expansion of macro 'TESTS'
 TESTS
 ^
Please submit a full bug report,


(gdb) f 2
#2  0x00000000006bf18d in expand_expr_real_2 (ops=ops@entry=0x7fffffffd120,
target=target@entry=0x0, tmode=tmode@entry=VOIDmode,
modifier=modifier@entry=EXPAND_NORMAL)
    at ../../gcc-svn/trunk/gcc/expr.c:8971
8971          gcc_assert (temp);
(gdb) li
8966            }
8967          else
8968            gcc_assert (GET_MODE_CLASS (GET_MODE (op2)) ==
MODE_VECTOR_INT);
8969
8970          temp = expand_vec_perm (mode, op0, op1, op2, target);
8971          gcc_assert (temp);
8972          return temp;
8973
8974        case DOT_PROD_EXPR:
8975          {
(gdb) p temp
$1 = (rtx_def *) 0x0

expand_vec_perm returns NULL_RTX for mno-sse4.