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don't put function args in temps when not needed. still need to take care

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of the return value, but that can possibly be taken care of in an optimiser
pass.
This commit is contained in:
Bill Currie 2001-08-24 05:40:48 +00:00
parent 1ccccc654e
commit eeec89e6ba
1 changed files with 30 additions and 4 deletions
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34
tools/qfcc/source/expr.c
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@ -1000,6 +1000,28 @@ unary_expr (int op, expr_t *e)
abort ();
}
int
has_function_call (expr_t *e)
{
switch (e->type) {
case ex_block:
for (e = e->e.block.head; e; e = e->next)
if (has_function_call (e))
return 1;
return 0;
case ex_expr:
if (e->e.expr.op == 'c')
return 1;
return (has_function_call (e->e.expr.e1)
|| has_function_call (e->e.expr.e2));
case ex_uexpr:
if (e->e.expr.op != 'g')
return has_function_call (e->e.expr.e1);
default:
return 0;
}
}
expr_t *
function_expr (expr_t *e1, expr_t *e2)
{
@ -1082,10 +1104,14 @@ function_expr (expr_t *e1, expr_t *e2)
call = new_block_expr ();
for (e = e2, i = 0; e; e = e->next, i++) {
*a = new_temp_def_expr (arg_types[i]);
if (i) // compensate for new_binary_expr and the first arg
inc_users(*a);
append_expr (call, binary_expr ('=', *a, e));
if (has_function_call (e)) {
*a = new_temp_def_expr (arg_types[i]);
if (i) // compensate for new_binary_expr and the first arg
inc_users(*a);
append_expr (call, binary_expr ('=', *a, e));
} else {
*a = e;
}
a = &(*a)->next;
}
e = new_binary_expr ('c', e1, args);