* Make stack/preemption guard faster on ARM by putting stack...

src/heap.cc

Index: src/heap.cc
===================================================================
--- src/heap.cc	(revision 2758)
+++ src/heap.cc	(working copy)
@@ -3256,6 +3256,15 @@
 }
 
 
+void Heap::SetStackLimit(intptr_t limit) {
+  // Set up the special root array entry is the stack guard.

[Mads Ager (chromium), 2009/08/26 10:09:28]

is -> containing?

+  // This is actually an address, but the tag makes the GC ignore it.
+  limit &= ~kSmiTagMask;
+  limit |= kSmiTag;

[Mads Ager (chromium), 2009/08/26 10:09:28]

Do you need this?  You should be able to remove the explicit bit-fiddling here.

+  set_stack_limit(Smi::FromInt(limit >> kSmiTagSize));
+}
+
+
 void Heap::TearDown() {
   GlobalHandles::TearDown();