[Bug tree-optimization/80136] New: ICE in gimplify_modify_expr, at gimplify.c:5627

["clyon at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80136

            Bug ID: 80136
           Summary: ICE in gimplify_modify_expr, at gimplify.c:5627
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: clyon at gcc dot gnu.org
  Target Milestone: ---

Created attachment 41015
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41015&action=edit
vfscanf.i

Hi,

Since r246319 to fix pr79908, I've noticed an ICE while building glibc for
aarch64-linux-gnu.

aarch64-none-linux-gnu-gcc vfscanf.i -O2 -c
In function '_IO_vfscanf_internal':
cc1: internal compiler error: in gimplify_modify_expr, at gimplify.c:5627
0x8ea10f gimplify_modify_expr
        /home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk/gcc/gimplify.c:5626
0x8d6f8b gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
       
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk/gcc/gimplify.c:11198
0x8daad6 gimplify_stmt(tree_node**, gimple**)
        /home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk/gcc/gimplify.c:6477
0x8e0042 gimplify_cond_expr
        /home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk/gcc/gimplify.c:3971
0x8d81c1 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
       
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk/gcc/gimplify.c:11154
0x8daad6 gimplify_stmt(tree_node**, gimple**)
        /home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk/gcc/gimplify.c:6477
0x8df819 gimplify_cond_expr
        /home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk/gcc/gimplify.c:3864
0x8d81c1 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
       
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk/gcc/gimplify.c:11154
0x8d96f8 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
       
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk/gcc/gimplify.c:11356
0x8f8155 force_gimple_operand_1(tree_node*, gimple**, bool (*)(tree_node*),
tree_node*)
       
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk/gcc/gimplify-me.c:78
0xd892ac expand_ifn_va_arg_1
       
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk/gcc/tree-stdarg.c:1064
0xd892ac expand_ifn_va_arg
       
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk/gcc/tree-stdarg.c:1105
0xd8b35e execute
       
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk/gcc/tree-stdarg.c:1158