* How to get the Tree ARRAY_TYPE declaration size
@ 2010-03-23 2:23 Massimo Nazaria
2010-03-23 2:46 ` Ian Lance Taylor
0 siblings, 1 reply; 3+ messages in thread
From: Massimo Nazaria @ 2010-03-23 2:23 UTC (permalink / raw)
To: gcc
Hi everyone!
I need to get the array size from a declaration like "int v[100]" (here the size is "100").
For example:
if (TREE_CODE (TREE_TYPE (var))) == ARRAY_TYPE) {
int array_size = // ...here I want to get the size
}
How can I do?
Thank you
Max
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: How to get the Tree ARRAY_TYPE declaration size
2010-03-23 2:23 How to get the Tree ARRAY_TYPE declaration size Massimo Nazaria
@ 2010-03-23 2:46 ` Ian Lance Taylor
2010-03-23 22:30 ` Max N.
0 siblings, 1 reply; 3+ messages in thread
From: Ian Lance Taylor @ 2010-03-23 2:46 UTC (permalink / raw)
To: Massimo Nazaria; +Cc: gcc
Massimo Nazaria <max_n@rocketmail.com> writes:
> I need to get the array size from a declaration like "int v[100]" (here the size is "100").
>
> For example:
> if (TREE_CODE (TREE_TYPE (var))) == ARRAY_TYPE) {
> int array_size = // ...here I want to get the size
> }
Quoting gcc/tree.def:
/* Types of arrays. Special fields:
TREE_TYPE Type of an array element.
TYPE_DOMAIN Type to index by.
Its range of values specifies the array length.
The field TYPE_POINTER_TO (TREE_TYPE (array_type)) is always nonzero
and holds the type to coerce a value of that array type to in C.
TYPE_STRING_FLAG indicates a string (in contrast to an array of chars)
in languages (such as Chill) that make a distinction. */
In other words, look at TYPE_DOMAIN. It will often be an INTEGER_TYPE
whose TYPE_MIN_VALUE and TYPE_MAX_VALUE give you the minimum and
maximum valid array indices.
Ian
^ permalink raw reply [flat|nested] 3+ messages in thread
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2010-03-23 2:23 How to get the Tree ARRAY_TYPE declaration size Massimo Nazaria
2010-03-23 2:46 ` Ian Lance Taylor
2010-03-23 22:30 ` Max N.
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