From: John David Anglin <dave.anglin@nrc-cnrc.gc.ca>
Date: Mon, 16 Aug 2010 20:24:54 +0000 (+0000)
Subject: backport: re PR tree-optimization/44632 (wrong code for complex division)
X-Git-Tag: releases/gcc-4.4.5~136
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=405715122e5b16d798308ce6178e970a3c9460de;p=thirdparty%2Fgcc.git

backport: re PR tree-optimization/44632 (wrong code for complex division)

	Backport from mainline:
	2010-08-09  Richard Guenther  <rguenther@suse.de>

	PR middle-end/44632
	* function.c (gimplify_parameters): Do not clear addressable
	bit of the original parameter.

From-SVN: r163285
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0416f0c9d2c7..d8cfcc16bedb 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2010-08-16  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
+
+	Backport from mainline:
+	2010-08-09  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/44632
+	* function.c (gimplify_parameters): Do not clear addressable
+	bit of the original parameter.
+
 2010-08-14  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
 
 	Revert:
diff --git a/gcc/function.c b/gcc/function.c
index 9d1b471f157d..cba4a0509545 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -3407,12 +3407,10 @@ gimplify_parameters (void)
 		  DECL_IGNORED_P (local) = 0;
 		  /* If PARM was addressable, move that flag over
 		     to the local copy, as its address will be taken,
-		     not the PARMs.  */
+		     not the PARMs.  Keep the parms address taken
+		     as we'll query that flag during gimplification.  */
 		  if (TREE_ADDRESSABLE (parm))
-		    {
-		      TREE_ADDRESSABLE (parm) = 0;
-		      TREE_ADDRESSABLE (local) = 1;
-		    }
+		    TREE_ADDRESSABLE (local) = 1;
 		}
 	      else
 		{