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Implement the "&&" and "||" operators

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This implements the "&&" and "||" operators.

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

	* expop.h (class logical_and_operation)
	(class logical_or_operation): New.
	* eval.c (logical_and_operation::evaluate)
	(logical_or_operation::evaluate): New methods.
	* ax-gdb.c (logical_and_operation::do_generate_ax)
	(logical_or_operation::do_generate_ax): New methods.
This commit is contained in:
Tom Tromey
2021-03-08 07:27:57 -07:00
parent 2bc9b40ce1
commit 5019124b1d
4 changed files with 176 additions and 0 deletions
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56
gdb/ax-gdb.c
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@@ -2693,6 +2693,62 @@ var_value_operation::do_generate_ax (struct expression *exp,
}
}
void
logical_and_operation::do_generate_ax (struct expression *exp,
struct agent_expr *ax,
struct axs_value *value,
struct type *cast_type)
{
struct axs_value value1, value2;
int if1, go1, if2, go2, end;
/* Generate the obvious sequence of tests and jumps. */
std::get<0> (m_storage)->generate_ax (exp, ax, &value1);
gen_usual_unary (ax, &value1);
if1 = ax_goto (ax, aop_if_goto);
go1 = ax_goto (ax, aop_goto);
ax_label (ax, if1, ax->len);
std::get<1> (m_storage)->generate_ax (exp, ax, &value2);
gen_usual_unary (ax, &value2);
if2 = ax_goto (ax, aop_if_goto);
go2 = ax_goto (ax, aop_goto);
ax_label (ax, if2, ax->len);
ax_const_l (ax, 1);
end = ax_goto (ax, aop_goto);
ax_label (ax, go1, ax->len);
ax_label (ax, go2, ax->len);
ax_const_l (ax, 0);
ax_label (ax, end, ax->len);
value->kind = axs_rvalue;
value->type = builtin_type (ax->gdbarch)->builtin_int;
}
void
logical_or_operation::do_generate_ax (struct expression *exp,
struct agent_expr *ax,
struct axs_value *value,
struct type *cast_type)
{
struct axs_value value1, value2;
int if1, if2, end;
/* Generate the obvious sequence of tests and jumps. */
std::get<0> (m_storage)->generate_ax (exp, ax, &value1);
gen_usual_unary (ax, &value1);
if1 = ax_goto (ax, aop_if_goto);
std::get<1> (m_storage)->generate_ax (exp, ax, &value2);
gen_usual_unary (ax, &value2);
if2 = ax_goto (ax, aop_if_goto);
ax_const_l (ax, 0);
end = ax_goto (ax, aop_goto);
ax_label (ax, if1, ax->len);
ax_label (ax, if2, ax->len);
ax_const_l (ax, 1);
ax_label (ax, end, ax->len);
value->kind = axs_rvalue;
value->type = builtin_type (ax->gdbarch)->builtin_int;
}
}
/* This handles the middle-to-right-side of code generation for binary