jlebar added inline comments. ================ Comment at: lib/Headers/cuda_builtin_vars.h:72 @@ -66,1 +71,3 @@ + // uint3). This function is defined after we pull in vector_types.h. + __attribute__((device)) operator uint3() const; private: ---------------- tra wrote: > Considering that built-in variables are never instantiated, I wonder how it's > going to work as the operator will presumably need 'this' pointing > *somewhere*, even if we don't use it. Unused 'this' would probably get > optimized away with optimizations on, but -O0 may cause problems. This is interesting. In the ptx, threadIdx actually gets instantiated, as a non-weak global:
.global .align 1 .b8 threadIdx[1]; Then we take the address of this thing. At -O2, we don't emit a threadIdx global at all. I think this is basically fine. It's actually not right to change extern to static in the decl, because then we try to construct a __cuda_builtin_threadIdx_t, and the default constructor is deleted. :) http://reviews.llvm.org/D17561 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
