From: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 5 May 2010 09:25:01 +0000 (+0000)
Subject: 	* var-tracking.c (var_debug_decl): Save DECL_DEBUG_EXPR value
X-Git-Url: http://git.sourceforge.jp/view?a=commitdiff_plain;h=590a40b0f738239596da4e031056563d0e3fae38;p=pf3gnuchains%2Fgcc-fork.git

	* var-tracking.c (var_debug_decl): Save DECL_DEBUG_EXPR value
	in a temporary instead of invoking the macro multiple times.
	(track_expr_p): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@159058 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5eed15dfe67..6d232bb7acb 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2010-05-05  Jakub Jelinek  <jakub@redhat.com>
+
+	* var-tracking.c (var_debug_decl): Save DECL_DEBUG_EXPR value
+	in a temporary instead of invoking the macro multiple times.
+	(track_expr_p): Likewise.
+
 2010-05-04  Neil Vachharajani <nvachhar@google.com>
 
 	* doc/invoke.texi (-Wcoverage-mismatch): Updated documentation as
diff --git a/gcc/var-tracking.c b/gcc/var-tracking.c
index 55de2092c08..040a3e7a50c 100644
--- a/gcc/var-tracking.c
+++ b/gcc/var-tracking.c
@@ -1573,9 +1573,12 @@ static inline tree
 var_debug_decl (tree decl)
 {
   if (decl && DECL_P (decl)
-      && DECL_DEBUG_EXPR_IS_FROM (decl) && DECL_DEBUG_EXPR (decl)
-      && DECL_P (DECL_DEBUG_EXPR (decl)))
-    decl = DECL_DEBUG_EXPR (decl);
+      && DECL_DEBUG_EXPR_IS_FROM (decl))
+    {
+      tree debugdecl = DECL_DEBUG_EXPR (decl);
+      if (debugdecl && DECL_P (debugdecl))
+	decl = debugdecl;
+    }
 
   return decl;
 }
@@ -4497,12 +4500,14 @@ track_expr_p (tree expr, bool need_rtl)
      don't need to track this expression if the ultimate declaration is
      ignored.  */
   realdecl = expr;
-  if (DECL_DEBUG_EXPR_IS_FROM (realdecl) && DECL_DEBUG_EXPR (realdecl))
+  if (DECL_DEBUG_EXPR_IS_FROM (realdecl))
     {
       realdecl = DECL_DEBUG_EXPR (realdecl);
+      if (realdecl == NULL_TREE)
+	realdecl = expr;
       /* ??? We don't yet know how to emit DW_OP_piece for variable
 	 that has been SRA'ed.  */
-      if (!DECL_P (realdecl))
+      else if (!DECL_P (realdecl))
 	return 0;
     }