[turbofan] Run everything after representation selection concurrently.

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index 0f9516adf0febb749b65f9fea68075d9e18a89ff..8a0ff62910827609a2dda5217972f59f4312276f 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -19,6 +19,7 @@ const Register kReturnRegister1 = {Register::kCode_r1};
 const Register kReturnRegister2 = {Register::kCode_r2};
 const Register kJSFunctionRegister = {Register::kCode_r1};
 const Register kContextRegister = {Register::kCode_r7};
+const Register kAllocateSizeRegister = {Register::kCode_r1};
 const Register kInterpreterAccumulatorRegister = {Register::kCode_r0};
 const Register kInterpreterBytecodeOffsetRegister = {Register::kCode_r5};
 const Register kInterpreterBytecodeArrayRegister = {Register::kCode_r6};