S390: [turbofan] Run everything after representation selection concurrently.

src/s390/macro-assembler-s390.h

Index: src/s390/macro-assembler-s390.h
diff --git a/src/s390/macro-assembler-s390.h b/src/s390/macro-assembler-s390.h
index daed735a73a437fd976e9a83f71ac8797a311b0a..6556f2b592b9be4a136eb5f4590691637707e057 100644
--- a/src/s390/macro-assembler-s390.h
+++ b/src/s390/macro-assembler-s390.h
@@ -19,6 +19,7 @@ const Register kReturnRegister1 = {Register::kCode_r3};
 const Register kReturnRegister2 = {Register::kCode_r4};
 const Register kJSFunctionRegister = {Register::kCode_r3};
 const Register kContextRegister = {Register::kCode_r13};
+const Register kAllocateSizeRegister = {Register::kCode_r3};
 const Register kInterpreterAccumulatorRegister = {Register::kCode_r2};
 const Register kInterpreterBytecodeOffsetRegister = {Register::kCode_r5};
 const Register kInterpreterBytecodeArrayRegister = {Register::kCode_r6};