MIPS: Use JIC/JIALC offset when possible

src/builtins/mips/builtins-mips.cc

Index: src/builtins/mips/builtins-mips.cc
diff --git a/src/builtins/mips/builtins-mips.cc b/src/builtins/mips/builtins-mips.cc
index 7a9b2b32e7abc06b083c1309db694c3e16369631..fb5fe9642bd996361aca14f086fd701fa4156049 100644
--- a/src/builtins/mips/builtins-mips.cc
+++ b/src/builtins/mips/builtins-mips.cc
@@ -528,8 +528,12 @@ static void GenerateTailCallToReturnedCode(MacroAssembler* masm,
     __ SmiUntag(a0);
   }
 
-  __ Addu(at, v0, Operand(Code::kHeaderSize - kHeapObjectTag));
-  __ Jump(at);
+  if (IsMipsArchVariant(kMips32r6)) {
+    __ Jump(v0, Code::kHeaderSize - kHeapObjectTag);

[ivica.bogosavljevic, 2016/12/05 10:48:47]

Common routine

+  } else {
+    __ Addu(at, v0, Operand(Code::kHeaderSize - kHeapObjectTag));
+    __ Jump(at);
+  }
 }
 
 void Builtins::Generate_InOptimizationQueue(MacroAssembler* masm) {