[HIP] Fix unbundling archive

HIP is able to unbundle archive of bundled bitcode.
However currently there are two bugs:

1. archives passed by -l: are not unbundled.
2. archives passed as input files are not unbundled

The actual file name of an archive passed by -l: should
not be prefixed with lib and appended with '.a',
but the file path is prefixed with paths in '-L' options.

The actual file name of an archive passed as an input file
stays the same, not affected by the '-L' options.

1 files changed, 6 insertions, 2 deletions

diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 85c4bb4..c16797f 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -2909,12 +2909,16 @@ class OffloadingActionBuilder final {
         std::string FileName = IA->getInputArg().getAsString(Args);
         // Check if the type of the file is the same as the action. Do not
         // unbundle it if it is not. Do not unbundle .so files, for example,
-        // which are not object files.
+        // which are not object files. Files with extension ".lib" is classified
+        // as TY_Object but they are actually archives, therefore should not be
+        // unbundled here as objects. They will be handled at other places.
+        const StringRef LibFileExt = ".lib";
         if (IA->getType() == types::TY_Object &&
             (!llvm::sys::path::has_extension(FileName) ||
              types::lookupTypeForExtension(
                  llvm::sys::path::extension(FileName).drop_front()) !=
-                 types::TY_Object))
+                 types::TY_Object ||
+             llvm::sys::path::extension(FileName) == LibFileExt))
           return ABRT_Inactive;
 
         for (auto Arch : GpuArchList) {