test: bail early if tool_path is None

tool_path will be None for llvm-go if Go cannot be found

llvm-svn: 254190

1 files changed, 3 insertions, 1 deletions

diff --git a/llvm/test/lit.cfg b/llvm/test/lit.cfg
index cc4c169dbdd..3f710debf23 100644
--- a/llvm/test/lit.cfg
+++ b/llvm/test/lit.cfg
@@ -236,11 +236,13 @@ def find_tool_substitution(pattern):
     tool_path = lit_config.params.get(tool_name)
     if tool_path is None:
         tool_path = lit.util.which(tool_name, llvm_tools_dir)
+        if tool_path is None:
+            return tool_name, tool_path, tool_pipe
     if (tool_name == "llc" and
        'LLVM_ENABLE_MACHINE_VERIFIER' in os.environ and
        os.environ['LLVM_ENABLE_MACHINE_VERIFIER'] == "1"):
         tool_path += " -verify-machineinstrs"
-    if (tool_name == "llvm-go" and config.go_executable is not None):
+    if (tool_name == "llvm-go"):
         tool_path += " go=" + config.go_executable
     return tool_name, tool_path, tool_pipe