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tree: update address_space comment

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Mention front-end uses of the address_space bit-field, and remove the
inaccurate "only".

gcc/ChangeLog:

	* tree-core.h (struct tree_base): Update address_space comment.
This commit is contained in:
Jason Merrill 2023-10-23 12:27:24 -04:00
parent 668c4c3783
commit 1aa9f1cc98
1 changed files with 3 additions and 2 deletions
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5
gcc/tree-core.h
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@ -1082,10 +1082,11 @@ struct GTY(()) tree_base {
unsigned spare1 : 8;
/* This field is only used with TREE_TYPE nodes; the only reason it is
/* For _TYPE nodes, this is TYPE_ADDR_SPACE; the reason it is
present in tree_base instead of tree_type is to save space. The size
of the field must be large enough to hold addr_space_t values.
For CONSTRUCTOR nodes this holds the clobber_kind enum. */
For CONSTRUCTOR nodes this holds the clobber_kind enum.
The C++ front-end uses this in IDENTIFIER_NODE and NAMESPACE_DECL. */
unsigned address_space : 8;
} bits;