From: rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Sun, 2 Jan 2005 08:35:34 +0000 (+0000)
Subject:         * tree-vectorizer.c (vect_analyze_offset_expr): Strip conversions
X-Git-Tag: upstream/4.9.2~64748
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=948d06da5fc5356b377813cebc8b61307197ab1b;p=platform%2Fupstream%2Flinaro-gcc.git

    * tree-vectorizer.c (vect_analyze_offset_expr): Strip conversions
        that don't narrow the value.  Fail for other conversions.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@92804 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0ebb669..20b6d35 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,10 @@
 2005-01-01  Richard Henderson  <rth@redhat.com>
 
+	* tree-vectorizer.c (vect_analyze_offset_expr): Strip conversions
+	that don't narrow the value.  Fail for other conversions.
+
+2005-01-01  Richard Henderson  <rth@redhat.com>
+
 	PR c/19031
 	* c-decl.c (pop_file_scope): Call maybe_apply_pending_pragma_weaks.
 	* c-lang.c (finish_file): Don't do it here.
diff --git a/gcc/tree-vectorizer.c b/gcc/tree-vectorizer.c
index 5df56df..bd826d0 100644
--- a/gcc/tree-vectorizer.c
+++ b/gcc/tree-vectorizer.c
@@ -1390,7 +1390,22 @@ vect_analyze_offset_expr (tree expr,
   enum tree_code code;
   tree init, evolution, def_stmt;
 
-  STRIP_NOPS (expr);
+  /* Strip conversions that don't narrow the mode.  */
+  while (TREE_CODE (expr) == NOP_EXPR || TREE_CODE (expr) == CONVERT_EXPR)
+    {
+      tree to, ti;
+
+      to = TREE_TYPE (expr);
+      oprnd0 = TREE_OPERAND (expr, 0);
+      ti = TREE_TYPE (oprnd0);
+
+      if (!INTEGRAL_TYPE_P (to) || !INTEGRAL_TYPE_P (ti))
+	return false;
+      if (GET_MODE_SIZE (TYPE_MODE (to)) < GET_MODE_SIZE (TYPE_MODE (ti)))
+	return false;
+
+      expr = oprnd0;
+    }
   
   *step = NULL_TREE;
   *misalign = NULL_TREE;