Creating a lable() into the AssemblerBuffer should return an AssemblerLabel, not an unsigned int.
Created attachment 91861 [details]
Fixed in r85448
Due to the changes you did, building webkit for SH4 platform, I had the following error : error: AssemblerLabel does not name a type
I created a bug that fixes the issue: https://bugs.webkit.org/show_bug.cgi?id=59927
I think there is the same issue in MIPS platforms.