Add a MathFloor stub generated with TurboFan

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 165bf4f2e4c4af45807ddddd2abee5eb4211ced9..54a0903196f372af7d5e6d51ed7a37b35d00b314 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -175,6 +175,14 @@ int CompilationInfo::num_parameters() const {
 }
 
 
+int CompilationInfo::num_parameters_including_this() const {
+  return num_parameters() + (is_this_defined() ? 1 : 0);
+}
+
+
+bool CompilationInfo::is_this_defined() const { return !IsStub(); }
+
+
 int CompilationInfo::num_heap_slots() const {
   return has_scope() ? scope()->num_heap_slots() : 0;
 }
@@ -273,6 +281,14 @@ void CompilationInfo::LogDeoptCallPosition(int pc_offset, int inlining_id) {
 }
 
 
+Handle<Code> CompilationInfo::GenerateCodeStub() {
+  // Run a "mini pipeline", extracted from compiler.cc.
+  CHECK(Parser::ParseStatic(parse_info()));
+  CHECK(Compiler::Analyze(parse_info()));
+  return compiler::Pipeline(this).GenerateCode();
+}
+
+
 class HOptimizedGraphBuilderWithPositions: public HOptimizedGraphBuilder {
  public:
   explicit HOptimizedGraphBuilderWithPositions(CompilationInfo* info)