Index: clang/test/lit.cfg.py
===================================================================
--- clang/test/lit.cfg.py
+++ clang/test/lit.cfg.py
@@ -58,7 +58,8 @@
 
 tools = [
     'c-index-test', 'clang-check', 'clang-diff', 'clang-format', 'clang-tblgen',
-    'opt',
+    'llc', 'llvm-bcanalyzer', 'llvm-dis', 'llvm-lto', 'llvm-nm', 'llvm-objdump',
+    'llvm-profdata', 'llvm-readobj', 'opt',
     ToolSubst('%clang_func_map', command=FindTool(
         'clang-func-mapping'), unresolved='ignore'),
 ]
Index: lld/test/lit.cfg.py
===================================================================
--- lld/test/lit.cfg.py
+++ lld/test/lit.cfg.py
@@ -39,9 +39,12 @@
 llvm_config.use_lld()
 
 tool_patterns = [
-    'llc', 'llvm-as', 'llvm-mc', 'llvm-nm', 'llvm-objdump', 'llvm-pdbutil',
-    'llvm-dwarfdump', 'llvm-readelf', 'llvm-readobj', 'obj2yaml', 'yaml2obj',
-    'opt', 'llvm-dis']
+    'llc', 'llvm-ar', 'llvm-as', 'llvm-bcanalyzer', 'llvm-lib', 'llvm-mc', 'llvm-nm',
+    'llvm-objdump', 'llvm-pdbutil', 'llvm-dwarfdump', 'llvm-readelf', 'llvm-readobj',
+    'obj2yaml', 'yaml2obj', 'opt', 'llvm-dis']
+
+if platform.system() == 'Windows':
+    tool_patterns += ['LLD-LINK']
 
 llvm_config.add_tool_substitutions(tool_patterns)
 
Index: llvm/lib/Support/Windows/Process.inc
===================================================================
--- llvm/lib/Support/Windows/Process.inc
+++ llvm/lib/Support/Windows/Process.inc
@@ -235,19 +235,11 @@
     return mapWindowsError(::GetLastError());
 
   Args.reserve(ArgCount);
-  std::error_code ec;
-
-  // The first argument may contain just the name of the executable (e.g.,
-  // "clang") rather than the full path, so swap it with the full path.
-  wchar_t ModuleName[MAX_PATH];
-  int Length = ::GetModuleFileNameW(NULL, ModuleName, MAX_PATH);
-  if (0 < Length && Length < MAX_PATH)
-    UnicodeCommandLine[0] = ModuleName;
 
   // If the first argument is a shortened (8.3) name (which is possible even
   // if we got the module name), the driver will have trouble distinguishing it
   // (e.g., clang.exe v. clang++.exe), so expand it now.
-  ec = ExpandShortFileName(UnicodeCommandLine[0], Args, Alloc);
+  std::error_code ec = ExpandShortFileName(UnicodeCommandLine[0], Args, Alloc);
 
   for (int i = 1; i < ArgCount && !ec; ++i) {
     ec = WildcardExpand(UnicodeCommandLine[i], Args, Alloc);
Index: llvm/test/lit.cfg.py
===================================================================
--- llvm/test/lit.cfg.py
+++ llvm/test/lit.cfg.py
@@ -142,10 +142,10 @@
 tools.extend([
     'dsymutil', 'lli', 'lli-child-target', 'llvm-ar', 'llvm-as', 'llvm-bcanalyzer',
     'llvm-config', 'llvm-cov', 'llvm-cxxdump', 'llvm-cvtres', 'llvm-diff', 'llvm-dis',
-    'llvm-dwarfdump', 'llvm-extract', 'llvm-isel-fuzzer', 'llvm-opt-fuzzer', 'llvm-lib',
-    'llvm-link', 'llvm-lto', 'llvm-lto2', 'llvm-mc', 'llvm-mca',
-    'llvm-modextract', 'llvm-nm', 'llvm-objcopy', 'llvm-objdump',
-    'llvm-pdbutil', 'llvm-profdata', 'llvm-ranlib', 'llvm-readobj',
+    'llvm-dlltool', 'llvm-dwarfdump', 'llvm-dwp', 'llvm-extract', 'llvm-isel-fuzzer',
+    'llvm-opt-fuzzer', 'llvm-lib', 'llvm-link', 'llvm-lto', 'llvm-lto2', 'llvm-mc', 'llvm-mca',
+    'llvm-modextract', 'llvm-nm', 'llvm-objcopy', 'llvm-objdump', 'llvm-opt-report',
+    'llvm-pdbutil', 'llvm-profdata', 'llvm-ranlib', 'llvm-rc', 'llvm-readelf', 'llvm-readobj',
     'llvm-rtdyld', 'llvm-size', 'llvm-split', 'llvm-strings', 'llvm-strip', 'llvm-tblgen',
     'llvm-c-test', 'llvm-cxxfilt', 'llvm-xray', 'yaml2obj', 'obj2yaml',
     'yaml-bench', 'verify-uselistorder',