--- a/hotspot/agent/src/os/linux/Makefile	Thu May 07 13:54:48 2009 -0700
+++ b/hotspot/agent/src/os/linux/Makefile	Thu May 07 17:09:48 2009 -0700
@@ -60,6 +60,14 @@
   LFLAGS_LIBSA = -Xlinker --version-script=mapfile
 endif
 
+# If this is a --hash-style=gnu system, use --hash-style=both
+#   The gnu .hash section won't work on some Linux systems like SuSE 10.
+_HAS_HASH_STYLE_GNU:=$(shell $(CC) -dumpspecs | grep -- '--hash-style=gnu')
+ifneq ($(_HAS_HASH_STYLE_GNU),)
+  LDFLAGS_HASH_STYLE = -Wl,--hash-style=both
+endif
+LFLAGS_LIBSA += $(LDFLAGS_HASH_STYLE)
+
 $(LIBSA): $(OBJS) mapfile
 	if [ ! -d $(ARCH) ] ; then mkdir $(ARCH) ; fi
 	$(GCC) -shared $(LFLAGS_LIBSA) -o $(LIBSA) $(OBJS) $(LIBS)

--- a/hotspot/make/linux/makefiles/jsig.make	Thu May 07 13:54:48 2009 -0700
+++ b/hotspot/make/linux/makefiles/jsig.make	Thu May 07 17:09:48 2009 -0700
@@ -39,7 +39,7 @@
 # cause problems with interposing. See CR: 6466665
 # LFLAGS_JSIG += $(MAPFLAG:FILENAME=$(LIBJSIG_MAPFILE))
 
-LFLAGS_JSIG += -D_GNU_SOURCE -D_REENTRANT
+LFLAGS_JSIG += -D_GNU_SOURCE -D_REENTRANT $(LDFLAGS_HASH_STYLE)
 
 $(LIBJSIG): $(JSIGSRCDIR)/jsig.c $(LIBJSIG_MAPFILE)
 	@echo Making signal interposition lib...

--- a/hotspot/make/linux/makefiles/saproc.make	Thu May 07 13:54:48 2009 -0700
+++ b/hotspot/make/linux/makefiles/saproc.make	Thu May 07 17:09:48 2009 -0700
@@ -51,7 +51,7 @@
 	   $(MAKE) -f vm.make $(LIBSAPROC); \
 	fi
 
-SA_LFLAGS = $(MAPFLAG:FILENAME=$(SAMAPFILE))
+SA_LFLAGS = $(MAPFLAG:FILENAME=$(SAMAPFILE)) $(LDFLAGS_HASH_STYLE)
 
 $(LIBSAPROC): $(SASRCFILES) $(SAMAPFILE)
 	$(QUIETLY) if [ "$(BOOT_JAVA_HOME)" = "" ]; then \

--- a/hotspot/src/share/vm/opto/connode.cpp	Thu May 07 13:54:48 2009 -0700
+++ b/hotspot/src/share/vm/opto/connode.cpp	Thu May 07 17:09:48 2009 -0700
@@ -128,6 +128,10 @@
       // Swapped Cmp is OK
       (phase->eqv(cmp->in(2),f) &&
        phase->eqv(cmp->in(1),t)) ) {
+    // Give up this identity check for floating points because it may choose incorrect
+    // value around 0.0 and -0.0
+    if ( cmp->Opcode()==Op_CmpF || cmp->Opcode()==Op_CmpD )
+      return NULL;
     // Check for "(t==f)?t:f;" and replace with "f"
     if( b->_test._test == BoolTest::eq )
       return f;

--- a/hotspot/src/share/vm/opto/divnode.cpp	Thu May 07 13:54:48 2009 -0700
+++ b/hotspot/src/share/vm/opto/divnode.cpp	Thu May 07 17:09:48 2009 -0700
@@ -298,8 +298,10 @@
 
   // 6732154: Construct both w1 and w2 before transforming, so t
   // doesn't go dead prematurely.
+  // 6837011: We need to transform w2 before w1 because the
+  // transformation of w1 could return t.
+  w2 = phase->transform(w2);
   w1 = phase->transform(w1);
-  w2 = phase->transform(w2);
 
   // w1 = u0*v1 + w1;
   Node* u0v1 = phase->transform(new (phase->C, 3) MulLNode(u0, v1));

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/6837011/Test6837011.java	Thu May 07 17:09:48 2009 -0700
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/**
+ * @test
+ * @bug 6837011
+ * @summary SIGSEGV in PhaseIdealLoop in 32bit jvm
+ *
+ * @run main/othervm -Xcomp -XX:CompileOnly=Test6837011.main Test6837011
+ */
+
+public class Test6837011 {
+    static boolean var_3 = true;
+
+    public static void main(String[] args) {
+        double var_5;
+        char var_7 = 1;
+        double var_11 = 0;
+
+        do {
+            var_11++;
+            var_5 = (var_7 /= ( var_3 ? ~1L : 3 ) );
+        } while (var_11 < 1);
+    }
+}