[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.

2 files changed, 11 insertions, 3 deletions

diff --git a/clang/lib/Driver/ToolChains/AMDGPU.cpp b/clang/lib/Driver/ToolChains/AMDGPU.cpp
index dffc70d..29c8403 100644
--- a/clang/lib/Driver/ToolChains/AMDGPU.cpp
+++ b/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;
diff --git a/clang/lib/Driver/ToolChains/ROCm.h b/clang/lib/Driver/ToolChains/ROCm.h
index a6cc41d..1ba0f1b 100644
--- a/clang/lib/Driver/ToolChains/ROCm.h
+++ b/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;
   }
 };