[stubs] Introduce a dedicated FastNewObjectStub.

src/mips64/macro-assembler-mips64.cc

Index: src/mips64/macro-assembler-mips64.cc
diff --git a/src/mips64/macro-assembler-mips64.cc b/src/mips64/macro-assembler-mips64.cc
index 687c917b2e7d9ca3b78a760632416f326e00788d..f1f0e0722f3c05320f43aaaa7c5492e3e3ca9370 100644
--- a/src/mips64/macro-assembler-mips64.cc
+++ b/src/mips64/macro-assembler-mips64.cc
@@ -5973,6 +5973,17 @@ void MacroAssembler::AssertBoundFunction(Register object) {
 }
 
 
+void MacroAssembler::AssertReceiver(Register object) {
+  if (emit_debug_code()) {
+    STATIC_ASSERT(kSmiTag == 0);
+    SmiTst(object, t8);
+    Check(ne, kOperandIsASmiAndNotAReceiver, t8, Operand(zero_reg));
+    GetObjectType(object, t8, t8);
+    Check(ge, kOperandIsNotAReceiver, t8, Operand(FIRST_JS_RECEIVER_TYPE));
+  }
+}
+
+
 void MacroAssembler::AssertUndefinedOrAllocationSite(Register object,
                                                      Register scratch) {
   if (emit_debug_code()) {