* expr.h (EXPAND_MEMORY): New.
        * expr.c (expand_expr): Check it.
        * stmt.c (expand_asm_operands): Provide it when the constraint
        requires a memory.  Warn for memory input constraints without
        a memory operand.

        * gcc.dg/20011029-2.c: Fix the array reference.
        * gcc.dg/asm-7.c: New.

From-SVN: r67645