[turbofan] Run everything after representation selection concurrently.

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 b30dee33644459812f35f57fba39864daaa5ba5a..95592183429c184b0368ea5b33e47b169c341a68 100644
--- a/src/mips/macro-assembler-mips.h
+++ b/src/mips/macro-assembler-mips.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_t4};
 const Register kInterpreterBytecodeArrayRegister = {Register::kCode_t5};