[turbofan] Add Int64(Add|Sub)WithOverflow support.

src/mips64/macro-assembler-mips64.h

Index: src/mips64/macro-assembler-mips64.h
diff --git a/src/mips64/macro-assembler-mips64.h b/src/mips64/macro-assembler-mips64.h
index e1c16612d6d5f4d8f72b9c5a66c74e34d1140282..85150a7246919e33e754ba8c55cec3610cb5f645 100644
--- a/src/mips64/macro-assembler-mips64.h
+++ b/src/mips64/macro-assembler-mips64.h
@@ -1266,6 +1266,24 @@ class MacroAssembler: public Assembler {
                                 const Operand& right, Register overflow_dst,
                                 Register scratch);
 
+  inline void DaddBranchOvf(Register dst, Register left, const Operand& right,
+                            Label* overflow_label, Register scratch = at) {
+    DaddBranchOvf(dst, left, right, overflow_label, nullptr, scratch);
+  }
+
+  inline void DaddBranchNoOvf(Register dst, Register left, const Operand& right,
+                              Label* no_overflow_label, Register scratch = at) {
+    DaddBranchOvf(dst, left, right, nullptr, no_overflow_label, scratch);
+  }
+
+  void DaddBranchOvf(Register dst, Register left, const Operand& right,
+                     Label* overflow_label, Label* no_overflow_label,
+                     Register scratch = at);
+
+  void DaddBranchOvf(Register dst, Register left, Register right,
+                     Label* overflow_label, Label* no_overflow_label,
+                     Register scratch = at);
+
   void DsubuAndCheckForOverflow(Register dst, Register left, Register right,
                                 Register overflow_dst, Register scratch = at);
 
@@ -1273,6 +1291,24 @@ class MacroAssembler: public Assembler {
                                 const Operand& right, Register overflow_dst,
                                 Register scratch);
 
+  inline void DsubBranchOvf(Register dst, Register left, const Operand& right,
+                            Label* overflow_label, Register scratch = at) {
+    DsubBranchOvf(dst, left, right, overflow_label, nullptr, scratch);
+  }
+
+  inline void DsubBranchNoOvf(Register dst, Register left, const Operand& right,
+                              Label* no_overflow_label, Register scratch = at) {
+    DsubBranchOvf(dst, left, right, nullptr, no_overflow_label, scratch);
+  }
+
+  void DsubBranchOvf(Register dst, Register left, const Operand& right,
+                     Label* overflow_label, Label* no_overflow_label,
+                     Register scratch = at);
+
+  void DsubBranchOvf(Register dst, Register left, Register right,
+                     Label* overflow_label, Label* no_overflow_label,
+                     Register scratch = at);
+
   void BranchOnOverflow(Label* label,
                         Register overflow_check,
                         BranchDelaySlot bd = PROTECT) {