[clang] [Clang][AMDGPU] Search TheRock-based device libraries (PR #170590)

[Tsukasa OI via cfe-commits]

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@@ -436,15 +436,21 @@ void RocmInstallationDetector::detectDeviceLibrary() {
   if (HasDeviceLibrary)
     return;
 
-  // Find device libraries in a legacy ROCm directory structure
-  // ${ROCM_ROOT}/amdgcn/bitcode/*
+  // Find device libraries in a ROCm directory structure
   auto &ROCmDirs = getInstallationPathCandidates();
   for (const auto &Candidate : ROCmDirs) {
+    // Legacy: ${ROCM_PATH}/amdgcn/bitcode/*
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a4lg wrote:

@b-summer Wait, in my environment (ROCm 7.1.0), I only find device libraries at `/opt/rocm/amdgcn/bitcode`.  Am I missing something?

https://github.com/llvm/llvm-project/pull/170590