[Offload] Make CUDA Driver Version a string

[RossBrunton]

AMD treats this value as a string, so for consistency require this in
NVIDIA as well. This shouldn't change the output of the
llvm-offload-device-info tool, but does fix an issue in liboffload
when it tries to query the version.

[llvmbot]

@llvm/pr-subscribers-offload

Author: Ross Brunton (RossBrunton)

Changes

AMD treats this value as a string, so for consistency require this in
NVIDIA as well. This shouldn't change the output of the
llvm-offload-device-info tool, but does fix an issue in liboffload
when it tries to query the version.

---

Full diff: https://github.com/llvm/llvm-project/pull/146049.diff

1 Files Affected:

• (modified) offload/plugins-nextgen/cuda/src/rtl.cpp (+3-1)

diff --git a/offload/plugins-nextgen/cuda/src/rtl.cpp b/offload/plugins-nextgen/cuda/src/rtl.cpp
index 0e662b038c363..f1164074f9ea9 100644
--- a/offload/plugins-nextgen/cuda/src/rtl.cpp
+++ b/offload/plugins-nextgen/cuda/src/rtl.cpp
@@ -930,7 +930,9 @@ struct CUDADeviceTy : public GenericDeviceTy {
 
     CUresult Res = cuDriverGetVersion(&TmpInt);
     if (Res == CUDA_SUCCESS)
-      Info.add("CUDA Driver Version", TmpInt);
+      // For consistency with other drivers, store the version as a string
+      // rather than an integer
+      Info.add("CUDA Driver Version", std::to_string(TmpInt));
 
     Info.add("CUDA OpenMP Device Number", DeviceId);