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

src/assembler.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 91 matching lines @@
 
 namespace v8 {
 namespace internal {
 
 // -----------------------------------------------------------------------------
 // Common double constants.
 
 struct DoubleConstant BASE_EMBEDDED {
 double min_int;
 double one_half;
+double minus_one;
 double minus_one_half;
 double negative_infinity;
 double the_hole_nan;
 double uint32_bias;
 };
 
 static DoubleConstant double_constants;
 
 const char* const RelocInfo::kFillerCommentString = "DEOPTIMIZATION PADDING";
 
@@ skipping 821 matching lines @@
 }
 #endif  // VERIFY_HEAP
 
 
 // -----------------------------------------------------------------------------
 // Implementation of ExternalReference
 
 void ExternalReference::SetUp() {
   double_constants.min_int = kMinInt;
   double_constants.one_half = 0.5;
+  double_constants.minus_one = -1;
   double_constants.minus_one_half = -0.5;
   double_constants.the_hole_nan = bit_cast<double>(kHoleNanInt64);
   double_constants.negative_infinity = -V8_INFINITY;
   double_constants.uint32_bias =
     static_cast<double>(static_cast<uint32_t>(0xFFFFFFFF)) + 1;
 
   math_exp_data_mutex = new base::Mutex();
 }
 
 
@@ skipping 304 matching lines @@
   return ExternalReference(reinterpret_cast<void*>(&double_constants.one_half));
 }
 
 
 ExternalReference ExternalReference::address_of_minus_one_half() {
   return ExternalReference(
       reinterpret_cast<void*>(&double_constants.minus_one_half));
 }
 
 
+ExternalReference ExternalReference::address_of_minus_one() {
+  return ExternalReference(
+      reinterpret_cast<void*>(&double_constants.minus_one));
+}
+
+
 ExternalReference ExternalReference::address_of_negative_infinity() {
   return ExternalReference(
       reinterpret_cast<void*>(&double_constants.negative_infinity));
 }
 
 
 ExternalReference ExternalReference::address_of_the_hole_nan() {
   return ExternalReference(
       reinterpret_cast<void*>(&double_constants.the_hole_nan));
 }
@@ skipping 376 matching lines @@
   RecordRelocInfo(RelocInfo::JS_RETURN);
 }
 
 
 void Assembler::RecordDebugBreakSlot() {
   positions_recorder()->WriteRecordedPositions();
   EnsureSpace ensure_space(this);
   RecordRelocInfo(RelocInfo::DEBUG_BREAK_SLOT);
 }
 } }  // namespace v8::internal