* gimple.h (struct gimple_statement_base)<uid>: Document

	the restrictions on its use.
	(gimple_uid): Tidy.
	(gimple_set_uid): Tidy.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@143233 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0f0331a..2fade47 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2009-01-09  Diego Novillo  <dnovillo@google.com>
+
+       * gimple.h (struct gimple_statement_base)<uid>: Document
+       the restrictions on its use.
+       (gimple_uid): Tidy.
+       (gimple_set_uid): Tidy.
+
 2009-01-09  Jakub Jelinek  <jakub@redhat.com>
 
        * config/i386/i386.c (ix86_expand_movmem, ix86_expand_setmem): Add

diff --git a/gcc/gimple.h b/gcc/gimple.h
index 8f8e49b..7760e24 100644 (file)
--- a/gcc/gimple.h
+++ b/gcc/gimple.h
@@ -297,7 +297,9 @@ struct gimple_statement_base GTY(())
      in there.  */
   unsigned int subcode         : 16;
 
-  /* UID of this statement.  */
+  /* UID of this statement.  This is used by passes that want to
+     assign IDs to statements.  It must be assigned and used by each
+     pass.  By default it should be assumed to contain garbage.  */
   unsigned uid;
 
   /* [ WORD 2 ]
@@ -1204,7 +1206,7 @@ gimple_plf (gimple stmt, enum plf_mask plf)
 }
 
 
-/* Set the uid of statement  */
+/* Set the UID of statement.  */
 
 static inline void
 gimple_set_uid (gimple g, unsigned uid)
@@ -1213,7 +1215,7 @@ gimple_set_uid (gimple g, unsigned uid)
 }
 
 
-/* Return the uid of statement  */
+/* Return the UID of statement.  */
 
 static inline unsigned
 gimple_uid (const_gimple g)