diff -r 1ba79f2126df -r 7d70bcf940a9 patches/gcc/4.0.0/130-pr20973-fix.patch
--- a/patches/gcc/4.0.0/130-pr20973-fix.patch	Wed Oct 28 12:03:38 2009 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,80 +0,0 @@
-http://gcc.gnu.org/PR20973
-
-"gcc 4 (about RC1) miscompiles khtml, in fact something in CSS, which basically 
-leads to all websites being misrendered.  I can't easily reduce the testcase, 
-but have applied the whole preprocessed source of css/cssstyleselector.ii. 
- 
-It is to be compiled with g++ -O2 -fPIC -march=i586 -mtune=i686 
--fno-exceptions.  A more detailed analysis will follow, as we've found out 
-some things already."
-
----
-
-Subject: Bug 20973
-
-CVSROOT:	/cvs/gcc
-Module name:	gcc
-Branch: 	gcc-4_0-branch
-Changes by:	matz@gcc.gnu.org	2005-04-22 17:30:21
-
-Modified files:
-	gcc            : ChangeLog reload.c 
-
-Log message:
-	PR middle-end/20973
-	* reload.c (push_reload, find_dummy_reload): Check for uninitialized
-	pseudos.
-
-Patches:
-http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=2.7592.2.177&r2=2.7592.2.178
-http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/reload.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.268&r2=1.268.2.1
-
----
-
-===================================================================
-RCS file: /cvs/gcc/gcc/gcc/reload.c,v
-retrieving revision 1.268
-retrieving revision 1.268.2.1
-diff -u -r1.268 -r1.268.2.1
---- gcc/gcc/reload.c	2005/02/24 22:06:06	1.268
-+++ gcc/gcc/reload.c	2005/04/22 17:30:15	1.268.2.1
-@@ -1520,7 +1520,7 @@
-      But if there is no spilling in this block, that is OK.
-      An explicitly used hard reg cannot be a spill reg.  */
- 
--  if (rld[i].reg_rtx == 0 && in != 0)
-+  if (rld[i].reg_rtx == 0 && in != 0 && hard_regs_live_known)
-     {
-       rtx note;
-       int regno;
-@@ -1534,6 +1534,11 @@
- 	    && REG_P (XEXP (note, 0))
- 	    && (regno = REGNO (XEXP (note, 0))) < FIRST_PSEUDO_REGISTER
- 	    && reg_mentioned_p (XEXP (note, 0), in)
-+	    /* Check that we don't use a hardreg for an uninitialized
-+	       pseudo.  See also find_dummy_reload().  */
-+	    && (ORIGINAL_REGNO (XEXP (note, 0)) < FIRST_PSEUDO_REGISTER
-+		|| ! bitmap_bit_p (ENTRY_BLOCK_PTR->global_live_at_end,
-+				   ORIGINAL_REGNO (XEXP (note, 0))))
- 	    && ! refers_to_regno_for_reload_p (regno,
- 					       (regno
- 						+ hard_regno_nregs[regno]
-@@ -1997,7 +2002,17 @@
- 				is a subreg, and in that case, out
- 				has a real mode.  */
- 			     (GET_MODE (out) != VOIDmode
--			      ? GET_MODE (out) : outmode)))
-+			      ? GET_MODE (out) : outmode))
-+        /* But only do all this if we can be sure, that this input
-+           operand doesn't correspond with an uninitialized pseudoreg.
-+           global can assign some hardreg to it, which is the same as
-+	   a different pseudo also currently live (as it can ignore the
-+	   conflict).  So we never must introduce writes to such hardregs,
-+	   as they would clobber the other live pseudo using the same.
-+	   See also PR20973.  */
-+      && (ORIGINAL_REGNO (in) < FIRST_PSEUDO_REGISTER
-+          || ! bitmap_bit_p (ENTRY_BLOCK_PTR->global_live_at_end,
-+			     ORIGINAL_REGNO (in))))
-     {
-       unsigned int regno = REGNO (in) + in_offset;
-       unsigned int nwords = hard_regno_nregs[regno][inmode];