Implement '==', '!=' and instanceof (without code generation).

runtime/vm/flow_graph_compiler_x64.cc

Index: runtime/vm/flow_graph_compiler_x64.cc
===================================================================
--- runtime/vm/flow_graph_compiler_x64.cc	(revision 5036)
+++ runtime/vm/flow_graph_compiler_x64.cc	(working copy)
@@ -275,6 +275,24 @@
 }
 
 
+void FlowGraphCompiler::VisitBooleanNegate(BooleanNegateComp* comp) {
+  const Bool& bool_true = Bool::ZoneHandle(Bool::True());
+  const Bool& bool_false = Bool::ZoneHandle(Bool::False());
+  Label done;
+  __ popq(RDX);

[Kevin Millikin (Google), 2012/03/07 10:22:38]

We can't assume comp->value() is on the stack.  Here's where we need LoadValue
to take a register argument:

LoadValue(RDX, comp->value());
__ LoadObject(RAX, bool_true);
... etc.

[srdjan, 2012/03/07 21:00:51]

Fixed, added tests, also create BooleanNegateComp in VisitUnaryOpNode.

+  __ LoadObject(RAX, bool_true);
+  __ cmpq(RAX, RDX);
+  __ j(NOT_EQUAL, &done, Assembler::kNearJump);
+  __ LoadObject(RAX, bool_false);
+  __ Bind(&done);
+}
+
+
+void FlowGraphCompiler::VisitInstanceOf(InstanceOfComp* comp) {
+  Bailout("InstanceOf");
+}
+
+
 void FlowGraphCompiler::VisitJoinEntry(JoinEntryInstr* instr) {
   Bailout("JoinEntryInstr");
 }