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Introduce sub_operation

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This adds class sub_operation, which implements BINOP_SUB.

gdb/ChangeLog
2021-03-08  Tom Tromey  <tom@tromey.com>

	* expop.h (class sub_operation): New.
	* eval.c (eval_op_sub): No longer static.  Remove "op" parameter.
	(evaluate_subexp_standard): Update.
This commit is contained in:
Tom Tromey 2021-03-08 07:27:57 -07:00
parent a94323b607
commit 5133d78b7b
3 changed files with 51 additions and 5 deletions
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6
gdb/ChangeLog
View File

@ -1,3 +1,9 @@
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class sub_operation): New.
* eval.c (eval_op_sub): No longer static. Remove "op" parameter.
(evaluate_subexp_standard): Update.
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class add_operation): New.

10
gdb/eval.c
View File

@ -1483,15 +1483,15 @@ eval_op_add (struct type *expect_type, struct expression *exp,
/* A helper function for BINOP_SUB. */
static struct value *
struct value *
eval_op_sub (struct type *expect_type, struct expression *exp,
enum noside noside, enum exp_opcode op,
enum noside noside,
struct value *arg1, struct value *arg2)
{
if (noside == EVAL_SKIP)
return eval_skip_value (exp);
if (binop_user_defined_p (op, arg1, arg2))
return value_x_binop (arg1, arg2, op, OP_NULL, noside);
if (binop_user_defined_p (BINOP_SUB, arg1, arg2))
return value_x_binop (arg1, arg2, BINOP_SUB, OP_NULL, noside);
else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
&& ptrmath_type_p (exp->language_defn, value_type (arg2)))
{
@ -2827,7 +2827,7 @@ evaluate_subexp_standard (struct type *expect_type,
case BINOP_SUB:
arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
return eval_op_sub (expect_type, exp, noside, op, arg1, arg2);
return eval_op_sub (expect_type, exp, noside, arg1, arg2);
case BINOP_EXP:
case BINOP_MUL:

40
gdb/expop.h
View File

@ -92,6 +92,10 @@ extern struct value *eval_op_add (struct type *expect_type,
struct expression *exp,
enum noside noside,
struct value *arg1, struct value *arg2);
extern struct value *eval_op_sub (struct type *expect_type,
struct expression *exp,
enum noside noside,
struct value *arg1, struct value *arg2);
namespace expr
{
@ -1001,6 +1005,42 @@ protected:
}
};
class sub_operation
: public maybe_constant_operation<operation_up, operation_up>
{
public:
using maybe_constant_operation::maybe_constant_operation;
value *evaluate (struct type *expect_type,
struct expression *exp,
enum noside noside) override
{
value *lhs
= std::get<0> (m_storage)->evaluate_with_coercion (exp, noside);
value *rhs
= std::get<1> (m_storage)->evaluate_with_coercion (exp, noside);
return eval_op_sub (expect_type, exp, noside, lhs, rhs);
}
enum exp_opcode opcode () const override
{ return BINOP_SUB; }
protected:
void do_generate_ax (struct expression *exp,
struct agent_expr *ax,
struct axs_value *value,
struct type *cast_type)
override
{
gen_expr_binop (exp, BINOP_SUB,
std::get<0> (this->m_storage).get (),
std::get<1> (this->m_storage).get (),
ax, value);
}
};
} /* namespace expr */
#endif /* EXPOP_H */