Adapt long branches to use bc & balc on r6.

src/mips/macro-assembler-mips.h

Index: src/mips/macro-assembler-mips.h
diff --git a/src/mips/macro-assembler-mips.h b/src/mips/macro-assembler-mips.h
index 013f77d288ec820b6d9c43bd82158bab5e324f58..8890be8131cf5eb9678ca9fe14945020952ce2a8 100644
--- a/src/mips/macro-assembler-mips.h
+++ b/src/mips/macro-assembler-mips.h
@@ -1659,8 +1659,8 @@ const Operand& rt = Operand(zero_reg), BranchDelaySlot bd = PROTECT
   bool BranchAndLinkShortCheck(int32_t offset, Label* L, Condition cond,
                                Register rs, const Operand& rt,
                                BranchDelaySlot bdslot);
-  void Jr(Label* L, BranchDelaySlot bdslot);
-  void Jalr(Label* L, BranchDelaySlot bdslot);
+  void BranchLong(Label* L, BranchDelaySlot bdslot);
+  void BranchAndLinkLong(Label* L, BranchDelaySlot bdslot);
 
   // Common implementation of BranchF functions for the different formats.
   void BranchFCommon(SecondaryField sizeField, Label* target, Label* nan,