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

src/assembler.cc

Index: src/assembler.cc
diff --git a/src/assembler.cc b/src/assembler.cc
index 1464074b894640d8d19e9104b96849e9526581f8..038363c7c0ff8c996483948c03521fc370964acb 100644
--- a/src/assembler.cc
+++ b/src/assembler.cc
@@ -109,6 +109,7 @@ namespace internal {
 struct DoubleConstant BASE_EMBEDDED {
 double min_int;
 double one_half;
+double minus_one;
 double minus_one_half;
 double negative_infinity;
 double the_hole_nan;
@@ -950,6 +951,7 @@ void RelocInfo::Verify(Isolate* isolate) {
 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;
@@ -1274,6 +1276,12 @@ ExternalReference ExternalReference::address_of_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));