From: Kazu Hirata <kazu@cs.umass.edu>
Date: Tue, 26 Apr 2005 22:49:27 +0000 (+0000)
Subject: tree.h (tree_phi_node): Add a comment about the order of PHI arguments.
X-Git-Tag: misc/cutover-cvs2svn~3697
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=4b0ec99aaca0c0a3e90593ff166eb474947241c0;p=thirdparty%2Fgcc.git

tree.h (tree_phi_node): Add a comment about the order of PHI arguments.

	* tree.h (tree_phi_node): Add a comment about the order of PHI
	arguments.

From-SVN: r98798
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7749832e3bdd..8ba855b3d436 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -7,6 +7,9 @@
 	tree_ssa_iv_optimize_finalize): Use the VEC API instead of
 	VARRAY.
 
+	* tree.h (tree_phi_node): Add a comment about the order of PHI
+	arguments.
+
 2005-04-26  Paul Brook  <paul@codesourcery.com>
 
 	* config/arm/arm.md (thumb_mulsi3): Use two-operand assembly form.
diff --git a/gcc/tree.h b/gcc/tree.h
index 6bc8a34c94c1..40c31199e09a 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -1439,6 +1439,8 @@ struct tree_phi_node GTY(())
   /* Basic block to that the phi node belongs.  */
   struct basic_block_def *bb;
 
+  /* Arguments of the PHI node.  These are maintained in the same
+     order as predecessor edge vector BB->PREDS.  */
   struct phi_arg_d GTY ((length ("((tree)&%h)->phi.num_args"))) a[1];
 };