[clang] [clang][SPIR-V] Fix OpenCL addrspace mapping when using non-zero default AS (PR #137187)

[Nick Sarnie via cfe-commits]

sarnex wrote:

@yingcong-wu Hi, I'm not totally sure what you mean, did this change break something for you or did it fix something? Feel free to email me internally as well. Thanks

https://github.com/llvm/llvm-project/pull/137187