[Bug rtl-optimization/79812] New: [7 Regression] ICE in simplify_binary_operation_1, at simplify-rtx.c:3586

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79812

            Bug ID: 79812
           Summary: [7 Regression] ICE in simplify_binary_operation_1, at
                    simplify-rtx.c:3586
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: rguenth at gcc dot gnu.org
  Target Milestone: ---

Starting from r223033, we ICE on:

gcc
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/avx512f-vpermq-imm-2.c
-O3 -mavx512er
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/avx512f-vpermq-imm-2.c:
In function ‘test_512’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/avx512f-vpermq-imm-2.c:63:1:
internal compiler error: in simplify_binary_operation_1, at simplify-rtx.c:3586
 }
 ^
0xbd9437 simplify_binary_operation_1
        ../../gcc/simplify-rtx.c:3586
0xbd996d simplify_binary_operation(rtx_code, machine_mode, rtx_def*, rtx_def*)
        ../../gcc/simplify-rtx.c:2102
0x12bf3e0 fold_rtx
        ../../gcc/cse.c:3727
0x12bef3d fold_rtx
        ../../gcc/cse.c:3225
0x12c03ad cse_insn
        ../../gcc/cse.c:4645
0x12c52b1 cse_extended_basic_block
        ../../gcc/cse.c:6569
0x12c52b1 cse_main
        ../../gcc/cse.c:6747
0x12c5a46 rest_of_handle_cse
        ../../gcc/cse.c:7567
0x12c5a46 execute
        ../../gcc/cse.c:7610