Graal - first step

[Rémi Forax]

Hi guys,
I've played a little with Graal and I've some questions (a lot in fact 
but I will send several messages :)

First, I've deactivated the bootstrap code just because it was too painful
to wait before having the real code to be executed. I think the 
bootstrap should
be guarded by a static final not enabled by default.

Also a code in the hotspot directory was not compiling because my gcc 
emit a warning
when you shift a long (32bits) by 32, using a long long solve the issue.
See the diff at the end of this message.

I also think you should add a README_GRAAL.txt at the root to explain
that to compile Graal , we have to use mx.

That all for this message,
cheers,
Rémi

diff --git a/src/os_cpu/linux_x86/vm/os_linux_x86.cpp 
b/src/os_cpu/linux_x86/vm/os_linux_x86.cpp
--- a/src/os_cpu/linux_x86/vm/os_linux_x86.cpp
+++ b/src/os_cpu/linux_x86/vm/os_linux_x86.cpp
@@ -313,7 +313,7 @@
            if (thread->thread_state() == _thread_in_Java) {
              // Throw a stack overflow exception.  Guard pages will be 
reenabled
              // while unwinding the stack.
-            if (WizardMode) tty->print("implicit: %08x%08x\n", 
((long)pc) >> 32, pc);
+            if (WizardMode) tty->print("implicit: %08x%08x\n", ((long 
long)pc) >> 32, pc);
              stub = 
SharedRuntime::continuation_for_implicit_exception(thread, pc, 
SharedRuntime::STACK_OVERFLOW);
            } else {
              // Thread was in the vm or native code.  Return and try to 
finish.