jhuber6 wrote: > > Seems reasonable, which architectures require this? I know that NVIDIA > > deprecated the 32-bit `nvptx` target in CUDA 12 or something. > > I'm not an expert on CUDA but, AFAICT, even in 64-bit CUDA, certain pointers > such as those pointing to shared memory are 32 bit, because the size of > shared memory is somewhere in the kB range. This generates better code, fewer > registers, etc. I'm not sure why the option isn't enabled by default, > personally - it seems like `nvcc` is doing this by default. > > I was just playing with the option downstream and noticed this issue.
I figured it was something like that, since it saves a register per address. I don't know the history for why this isn't the default, it's pretty much just a data layout modifier to state that certain address spaces are 32-bit. Maybe @Artem-B or @jlebar can comment. https://github.com/llvm/llvm-project/pull/111682 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
