From: Alexandre Oliva <aoliva@redhat.com>
Date: Sat, 19 Feb 2011 21:15:01 +0000 (+0000)
Subject: re PR tree-optimization/46620 (32-bit structures containing bitfields are not copied... 
X-Git-Tag: releases/gcc-4.4.6~116
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f3f7e335f02d71b8a08e7ff19d5b433d8534b7ad;p=thirdparty%2Fgcc.git

re PR tree-optimization/46620 (32-bit structures containing bitfields are not copied correctly on -O2 , x86 backend)

PR tree-optimization/46620
* tree-sra.c (try_instantiate_multiple_fields): Don't get stuck at
padding within accessed words.

From-SVN: r170328
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7743ae0d4935..76fd7eb5944c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2011-02-19  Alexandre Oliva  <aoliva@redhat.com>
+
+	PR tree-optimization/46620
+	* tree-sra.c (try_instantiate_multiple_fields): Don't get stuck at
+	padding within accessed words.
+
 2011-02-18  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
 
 	* config.gcc (hppa[12]*-*-hpux11*): Set extra_parts.
diff --git a/gcc/tree-sra.c b/gcc/tree-sra.c
index b693ddd178dd..b0200cd1ffe8 100644
--- a/gcc/tree-sra.c
+++ b/gcc/tree-sra.c
@@ -1661,13 +1661,13 @@ try_instantiate_multiple_fields (struct sra_elt *elt, tree f)
 		  || mbit + msize <= fbit)
 		continue;
 
-	      if (fbit <= mbit)
+	      if (fbit < bit)
 		{
 		  unsigned HOST_WIDE_INT diff = fbit + fsize - mbit;
 		  mbit += diff;
 		  msize -= diff;
 		}
-	      else if (fbit > mbit)
+	      else if (fbit > bit)
 		msize -= (mbit + msize - fbit);
 	      else
 		gcc_unreachable ();