Collect type feedback on result of Math.[round|ceil|floor]

src/x64/macro-assembler-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
@@ skipping 715 matching lines @@
 
 
 void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) {
   DCHECK(!target.is(rdi));
   // Load the JavaScript builtin function from the builtins object.
   GetBuiltinFunction(rdi, id);
   movp(target, FieldOperand(rdi, JSFunction::kCodeEntryOffset));
 }
 
 
+void MacroAssembler::BranchIfNotBuiltin(Register function, Register temp,
+                                        BuiltinFunctionId id, Label* miss) {
+  movp(temp, FieldOperand(function, JSFunction::kSharedFunctionInfoOffset));
+  movp(temp, FieldOperand(temp, SharedFunctionInfo::kFunctionDataOffset));
+  Cmp(temp, Smi::FromInt(id));
+  j(not_equal, miss);
+}
+
+
 #define REG(Name) { kRegister_ ## Name ## _Code }
 
 static const Register saved_regs[] = {
   REG(rax), REG(rcx), REG(rdx), REG(rbx), REG(rbp), REG(rsi), REG(rdi), REG(r8),
   REG(r9), REG(r10), REG(r11)
 };
 
 #undef REG
 
 static const int kNumberOfSavedRegs = sizeof(saved_regs) / sizeof(Register);
@@ skipping 4344 matching lines @@
   if (mag.shift > 0) sarl(rdx, Immediate(mag.shift));
   movl(rax, dividend);
   shrl(rax, Immediate(31));
   addl(rdx, rax);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64