From: kazu <kazu@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 6 Apr 2005 17:41:11 +0000 (+0000)
Subject: 	* tree-ssa-sink.c (nearest_common_dominator_of_uses): Look at
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=737b5433db287af159d307bea36b7e0d8f0d0f25;p=thirdparty%2Fgcc.git

	* tree-ssa-sink.c (nearest_common_dominator_of_uses): Look at
	a PHI argument where a use occurs instead of all PHI arguments.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@97738 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6d1882a583f8..f8417dc2b3f3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2005-04-06  Kazu Hirata  <kazu@cs.umass.edu>
+
+	* tree-ssa-sink.c (nearest_common_dominator_of_uses): Look at
+	a PHI argument where a use occurs instead of all PHI arguments.
+
 2005-04-06  Joseph S. Myers  <joseph@codesourcery.com>
 
 	* c-decl.c (finish_decl): Apply pending #pragma weak regardless of
diff --git a/gcc/tree-ssa-sink.c b/gcc/tree-ssa-sink.c
index c8785de9e17d..cecbae7a74f2 100644
--- a/gcc/tree-ssa-sink.c
+++ b/gcc/tree-ssa-sink.c
@@ -240,10 +240,10 @@ nearest_common_dominator_of_uses (tree stmt)
 	  basic_block useblock;
 	  if (TREE_CODE (usestmt) == PHI_NODE)
 	    {
-	      int j;
-	      for (j = 0; j < PHI_NUM_ARGS (usestmt); j++)
+	      int idx = PHI_ARG_INDEX_FROM_USE (use_p);
+	      if (PHI_ARG_DEF (usestmt, idx) == var)
 		{
-		  useblock = PHI_ARG_EDGE (usestmt, j)->src;
+		  useblock = PHI_ARG_EDGE (usestmt, idx)->src;
 		  /* Short circuit. Nothing dominates the entry block.  */
 		  if (useblock == ENTRY_BLOCK_PTR)
 		    {