[Bug c/66064] New: under O2 level ，x86-64 compiler ICE，informance：internal compiler error: in fold_convert_loc, at fold-const.c:1894

[huangcunjian at huawei dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66064

            Bug ID: 66064
           Summary: under O2 level ，x86-64 compiler
                    ICE，informance：internal compiler error: in
                    fold_convert_loc, at fold-const.c:1894
           Product: gcc
           Version: 4.7.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: huangcunjian at huawei dot com
  Target Milestone: ---

case context：
__attribute__ ((vector_size (16))) g_73 = {0x15FE687EL, 0x5827DF98L,
0xF8411272L, 0x235E695EL};
__attribute__ ((vector_size (16))) g_1124;

int func_1(void)
{  
    __attribute__ ((vector_size (16))) l_1117 = {0x15FE688EL, 0x5827DF98L,
0xF8411272L, 0x235E695EL};
    __attribute__ ((vector_size (16))) zhong = ( g_73 <= g_73);
         g_1124 = (((g_73 < l_1117) == (zhong)) << 9)    ;

    return 0;
}
target :x86_64-suse-linux
host: x86_64-suse-linux
build:x86_64-suse-linux

command:
../../compiler/hcc-x86_64-linux/bin/gcc-4.7 test_1.c -O2

output:
test_1.c:11:1: internal compiler error: in fold_convert_loc, at
fold-const.c:1894
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See <http://gcc.gnu.org/bugs.html> for instructions.