[PATCH] D152734: [HIP] Fix HIP path detection

[Yaxun Liu via Phabricator via cfe-commits]

yaxunl created this revision.
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Fix two issues:

1. `--hip-path` should not do rigorous checking, i.e. if .hipVersion exists it will use it, otherwise it will not error out but assumes the default HIP version. This is to be consistent with --rocm-path behavior.

2. when HIP_PATH is empty, it should be ignored. This is to be consistent with ROCM_PATH behavior.


https://reviews.llvm.org/D152734

Files:
  clang/lib/Driver/ToolChains/AMDGPU.cpp
  clang/test/Driver/hip-version.hip
  clang/test/Driver/rocm-detect.hip

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