Remove complicated Math.sin and Math.cos optimizations that do not buy...

src/x64/codegen-x64.cc

Index: src/x64/codegen-x64.cc
===================================================================
--- src/x64/codegen-x64.cc	(revision 3505)
+++ src/x64/codegen-x64.cc	(working copy)
@@ -3979,72 +3979,6 @@
 }
 
 
-void CodeGenerator::GenerateFastMathOp(MathOp op, ZoneList<Expression*>* args) {
-  JumpTarget done;
-  JumpTarget call_runtime;
-  ASSERT(args->length() == 1);
-
-  // Load number and duplicate it.
-  Load(args->at(0));
-  frame_->Dup();
-
-  // Get the number into an unaliased register and load it onto the
-  // floating point stack still leaving one copy on the frame.
-  Result number = frame_->Pop();
-  number.ToRegister();
-  frame_->Spill(number.reg());
-  FloatingPointHelper::LoadFloatOperand(masm_, number.reg());
-  number.Unuse();
-
-  // Perform the operation on the number.
-  switch (op) {
-    case SIN:
-      __ fsin();
-      break;
-    case COS:
-      __ fcos();
-      break;
-  }
-
-  // Go slow case if argument to operation is out of range.
-  Result eax_reg = allocator()->Allocate(rax);
-  ASSERT(eax_reg.is_valid());
-  __ fnstsw_ax();
-  __ testl(rax, Immediate(0x0400));  // Bit 10 is condition flag C2.
-  eax_reg.Unuse();
-  call_runtime.Branch(not_zero);
-
-  // Allocate heap number for result if possible.
-  Result scratch = allocator()->Allocate();
-  Result heap_number = allocator()->Allocate();
-  __ AllocateHeapNumber(heap_number.reg(),
-                        scratch.reg(),
-                        call_runtime.entry_label());
-  scratch.Unuse();
-
-  // Store the result in the allocated heap number.
-  __ fstp_d(FieldOperand(heap_number.reg(), HeapNumber::kValueOffset));
-  // Replace the extra copy of the argument with the result.
-  frame_->SetElementAt(0, &heap_number);
-  done.Jump();
-
-  call_runtime.Bind();
-  // Free ST(0) which was not popped before calling into the runtime.
-  __ ffree(0);
-  Result answer;
-  switch (op) {
-    case SIN:
-      answer = frame_->CallRuntime(Runtime::kMath_sin, 1);
-      break;
-    case COS:
-      answer = frame_->CallRuntime(Runtime::kMath_cos, 1);
-      break;
-  }
-  frame_->Push(&answer);
-  done.Bind();
-}
-
-
 void CodeGenerator::GenerateStringAdd(ZoneList<Expression*>* args) {
   ASSERT_EQ(2, args->length());