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* tree.h (tree_phi_node): Add a comment about the order of PHI
authorkazu <kazu@138bc75d-0d04-0410-961f-82ee72b054a4>
Tue, 26 Apr 2005 22:49:27 +0000 (22:49 +0000)
committerkazu <kazu@138bc75d-0d04-0410-961f-82ee72b054a4>
Tue, 26 Apr 2005 22:49:27 +0000 (22:49 +0000)
arguments.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@98798 138bc75d-0d04-0410-961f-82ee72b054a4

gcc/ChangeLog
gcc/tree.h

index 7749832..8ba855b 100644 (file)
@@ -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.
index 6bc8a34..40c3119 100644 (file)
@@ -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];
 };
 \f