X64: Count operations (increment, decrement)

src/x64/register-allocator-x64.cc

Index: src/x64/register-allocator-x64.cc
diff --git a/src/x64/register-allocator-x64.cc b/src/x64/register-allocator-x64.cc
index 660618b613cf4436169a9700d7f54df21674f944..0dd4abcd8f35c1800f537352a3706da342d672b5 100644
--- a/src/x64/register-allocator-x64.cc
+++ b/src/x64/register-allocator-x64.cc
@@ -71,4 +71,17 @@ void Result::ToRegister(Register target) {
 }
 
 
+// -------------------------------------------------------------------------
+// RegisterAllocator implementation.
+
+Result RegisterAllocator::AllocateByteRegisterWithoutSpilling() {
+  // X64 has no distinction between registers that can be used as 8-bit
+  // and registers that can't. However, if the register is not one of
+  // AL, CL, DL or BL, the REX.W bit is necessary to trigger 64-bit

[William Hesse, 2009/06/25 10:46:05]

We really don't even need this function anymore.  It is misleading, at best.

+  // interpretation of 8-bit registers (using SPL, BPL, DIL and SIL
+  // instead of AH, CH, DH and BH).
+  return AllocateWithoutSpilling();
+}
+
+
 } }  // namespace v8::internal