[Bug target/71185] New: ice in gimplify_modify_expr, at gimplify.c:4873

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71185

            Bug ID: 71185
           Summary: ice in gimplify_modify_expr, at gimplify.c:4873
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

Created attachment 38518
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38518&action=edit
C source code

The attached source code, when compiled by gcc trunk dated 20160516,
also given compiler flags -c -O3 -march=native, does this:

$ ../results/bin/gcc -c -O3 -march=native bug286.c
In function ‘cubic_stage_fn’:
cc1: internal compiler error: in gimplify_modify_expr, at gimplify.c:4873
0x98d609 gimplify_modify_expr
        ../../src/trunk/gcc/gimplify.c:4872
0x977b74 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../src/trunk/gcc/gimplify.c:10301
0x97a346 gimplify_stmt(tree_node**, gimple**)
        ../../src/trunk/gcc/gimplify.c:5699
0x97d000 gimplify_and_add(tree_node*, gimple**)
        ../../src/trunk/gcc/gimplify.c:427

Machine is

model name      : AMD Phenom(tm) II X4 970 Processor