tianshilei1992 added inline comments.
================
Comment at: clang/lib/Driver/ToolChains/AMDGPUOpenMP.cpp:193
CC1Args.push_back("-emit-llvm-bc");
+
+ std::string BitcodeSuffix = "amdgcn-" + GpuArch.str();
----------------
JonChesterfield wrote:
> tianshilei1992 wrote:
> > JonChesterfield wrote:
> > > Need `if (DriverArgs.hasArg(options::OPT_nogpulib)) return;` here or we
> > > can't build the deviceRTL without already having one on disk
> > FWIW, NVPTX `deviceRTLs` is built by directly calling FE, not via clang
> > driver. `clang -fopenmp -fopenmp-targets=xxx` basically consists of two
> > passes, and therefore generates two IRs, which is not what we expect. I'm
> > not sure we really need the if statement.
> That explains what I was missing about the ptx cmake I think. I've had to
> locally hack around clang creating a bundle, which llvm-link chokes on,
> because cuda-device-only et al are ignored by openmp.
>
> I think this check is right - it means nogpulib will exclude the rtl on both
> GPUs. Nvptx already has it in the control flow.
>
> Whether RTL cmake should bypass the driver is interesting, but I think
> separate to this patch.
`cuda-device-only` is only for CUDA compilation. We don’t have an option to
invoke device compilation only.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D96248/new/
https://reviews.llvm.org/D96248
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