Add utils/TestUtils, and sink pch-test.pl there.

Also, add a test for generator a C file with a very deep call stack.

llvm-svn: 90468

clang/utils/TestUtils/deep-stack.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python
+
+def pcall(f, N):
+    if N == 0:
+        print >>f, '    f(0)'
+        return
+
+    print >>f, '    f('
+    pcall(f, N - 1)
+    print >>f, '     )'
+
+def main():
+    f = open('t.c','w')
+    print >>f, 'int f(int n) { return n; }'
+    print >>f, 'int t() {'
+    print >>f, '  return'
+    pcall(f, 10000)
+    print >>f, '  ;'
+    print >>f, '}'
+
+if __name__ == "__main__":
+    import sys
+    sys.setrecursionlimit(100000)
+    main()