[Clang][AMDGPU] Improve error message when device libraries for COV6 are missing (#134745)

#130963 switches the default to COV6, which requires ROCm 6.3.
Currently, if the
device libraries for COV6 are not found, the error message is not very
helpful.
This PR provides a more informative error message in such cases.

Author: shiltian

clang/include/clang/Basic/DiagnosticDriverKinds.td

@@ -67,7 +67,8 @@ def err_drv_no_cuda_libdevice : Error<
   "libdevice">;
 
 def err_drv_no_rocm_device_lib : Error<
-  "cannot find ROCm device library%select{| for %1| for ABI version %1}0; provide its path via "
+  "cannot find ROCm device library%select{| for %1| for ABI version %1"
+  "%select{|, which requires ROCm %3 or higher}2}0; provide its path via "
   "'--rocm-path' or '--rocm-device-lib-path', or pass '-nogpulib' to build "
   "without ROCm device library">;
 def err_drv_no_hip_runtime : Error<

clang/lib/Driver/ToolChains/AMDGPU.cpp

@@ -935,7 +935,13 @@ bool RocmInstallationDetector::checkCommonBitcodeLibs(
     return false;
   }
   if (ABIVer.requiresLibrary() && getABIVersionPath(ABIVer).empty()) {
-    D.Diag(diag::err_drv_no_rocm_device_lib) << 2 << ABIVer.toString();
+    // Starting from COV6, we will report minimum ROCm version requirement in
+    // the error message.
+    if (ABIVer.getAsCodeObjectVersion() < 6)
+      D.Diag(diag::err_drv_no_rocm_device_lib) << 2 << ABIVer.toString() << 0;
+    else
+      D.Diag(diag::err_drv_no_rocm_device_lib)
+          << 2 << ABIVer.toString() << 1 << "6.3";
     return false;
   }
   return true;

clang/lib/Driver/ToolChains/ROCm.h

@@ -37,9 +37,11 @@ struct DeviceLibABIVersion {
   /// and below works with ROCm 5.0 and below which does not have
   /// abi_version_*.bc. Code object v5 requires abi_version_500.bc.
   bool requiresLibrary() { return ABIVersion >= 500; }
-  std::string toString() {
+  std::string toString() { return Twine(getAsCodeObjectVersion()).str(); }
+
+  unsigned getAsCodeObjectVersion() const {
     assert(ABIVersion % 100 == 0 && "Not supported");
-    return Twine(ABIVersion / 100).str();
+    return ABIVersion / 100;
   }
 };
 

clang/test/Driver/hip-device-libs.hip

@@ -254,4 +254,4 @@
 // NOABI4-NOT: "-mlink-builtin-bitcode" "{{.*}}oclc_abi_version_400.bc"
 // NOABI4-NOT: "-mlink-builtin-bitcode" "{{.*}}oclc_abi_version_500.bc"
 // NOABI5: error: cannot find ROCm device library for ABI version 5; provide its path via '--rocm-path' or '--rocm-device-lib-path', or pass '-nogpulib' to build without ROCm device library
-// NOABI6: error: cannot find ROCm device library for ABI version 6; provide its path via '--rocm-path' or '--rocm-device-lib-path', or pass '-nogpulib' to build without ROCm device library
+// NOABI6: error: cannot find ROCm device library for ABI version 6, which requires ROCm 6.3 or higher; provide its path via '--rocm-path' or '--rocm-device-lib-path', or pass '-nogpulib' to build without ROCm device library