Add support to lit for build mode requirements. e.g.

REQUIRES: Asserts
REQUIRES: Debug

This required chaining test configuration properties. It seems like a
generally good thing to do.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133131 91177308-0d34-0410-b5e6-96231b3b80d8

utils/lit/lit/TestRunner.py

@@ -473,9 +473,11 @@ def parseIntegratedTestScript(test, normalize_slashes=False):
     if script[-1][-1] == '\\':
         return (Test.UNRESOLVED, "Test has unterminated run lines (with '\\')")
 
-    # Check that we have the required features:
+    # Check that we have the required features or build modes:
     missing_required_features = [f for f in requires
-                                 if f not in test.config.available_features]
+                                 if f not in test.config.available_features
+                                 and f not in test.config.llvm_build_modes]
+
     if missing_required_features:
         msg = ', '.join(missing_required_features)
         return (Test.UNSUPPORTED,

utils/lit/lit/TestingConfig.py

@@ -74,6 +74,7 @@ class TestingConfig:
 
     def clone(self, path):
         # FIXME: Chain implementations?
+        # See attribute chaining in finish()
         #
         # FIXME: Allow extra parameters?
         cfg = TestingConfig(self, self.name, self.suffixes, self.test_format,
@@ -101,3 +102,9 @@ class TestingConfig:
             # files. Should we distinguish them?
             self.test_source_root = str(self.test_source_root)
         self.excludes = set(self.excludes)
+
+        # chain attributes by copying them
+        if self.parent:
+            for k,v in vars(self.parent).items():
+                if not hasattr(self, k):
+                    setattr(self, k, v)