[lit] Make symlinks in test paths work a different way

Use os.path.normpath instead of realpath to collapse '..' and '.' path
components. Use realpath when caching search results about a path for
good measure.

I considered rigging up a test involving symlinks for this, but I doubt
I can check a symlink into SVN. The test would have to conditionally
create a symlink at runtime if the host OS supports it. This sounds too
fragile and complicated to me to be worth it.

llvm-svn: 312254

1 files changed, 4 insertions, 3 deletions

diff --git a/llvm/utils/lit/lit/discovery.py b/llvm/utils/lit/lit/discovery.py
index 4befe582d45..ea6143d8166 100644
--- a/llvm/utils/lit/lit/discovery.py
+++ b/llvm/utils/lit/lit/discovery.py
@@ -52,13 +52,14 @@ def getTestSuite(item, litConfig, cache):
 
     def search(path):
         # Check for an already instantiated test suite.
-        res = cache.get(path)
+        real_path = os.path.realpath(path)
+        res = cache.get(real_path)
         if res is None:
-            cache[path] = res = search1(path)
+            cache[real_path] = res = search1(path)
         return res
 
     # Canonicalize the path.
-    item = os.path.realpath(item)
+    item = os.path.normpath(item)
 
     # Skip files and virtual components.
     components = []