[turbofan] Run everything after representation selection concurrently.

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 f27975d4c16bfd1532b960d3264ccdee7b0adca9..7aa4a51488339a125e15ef26123755b3bffa2521 100644
--- a/src/mips64/macro-assembler-mips64.h
+++ b/src/mips64/macro-assembler-mips64.h
@@ -18,6 +18,7 @@ const Register kReturnRegister1 = {Register::kCode_v1};
 const Register kReturnRegister2 = {Register::kCode_a0};
 const Register kJSFunctionRegister = {Register::kCode_a1};
 const Register kContextRegister = {Register::kCpRegister};
+const Register kAllocateSizeRegister = {Register::kCode_a0};
 const Register kInterpreterAccumulatorRegister = {Register::kCode_v0};
 const Register kInterpreterBytecodeOffsetRegister = {Register::kCode_t0};
 const Register kInterpreterBytecodeArrayRegister = {Register::kCode_t1};