llvm

30346f1d - [libclc] Fix double NAN_MASK in __clc_nan and use __clc_nan for __spirv_ocl_nan (#20366)

[libclc] Fix double NAN_MASK in __clc_nan and use __clc_nan for __spirv_ocl_nan (#20366) NAN_MASK fix is cherry-pick of https://github.com/llvm/llvm-project/pull/163522 Also fix a few build warnings `'__CLC_FUNCTION' macro redefined`.