Added utility create-filecheck-tests that takes in a sil fragment and converts SSA variables to FileCheck variables.

Swift SVN r11912

utils/create-filecheck-test.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python
+
+# The following script takes as input a SIL fragment and changes all
+# SSA variables into FileCheck variables. This significantly reduces
+# the amount of time required for creating complicated FileCheck
+# Tests.
+
+import sys
+import argparse
+import textwrap
+import re
+
+parser = argparse.ArgumentParser(description=textwrap.dedent("""
+Takes an input SIL fragment and changes all SSA variables into FileCheck
+variables.
+"""))
+
+parser.add_argument('input', type=argparse.FileType('r'),
+                    help='Input file. \'-\' for stdin.')
+parser.add_argument('-o', type=argparse.FileType('w'),
+                    metavar='output',
+                    help='Output file. Defaults to stdout.',
+                    default=sys.stdout)
+
+args = parser.parse_args()
+
+seen_variables = set([])
+ssa_re = re.compile('[%](\d+)')
+for l in args.input.readlines():
+    l = l[:l.find('//')].rstrip() + "\n"
+    have_match = False
+    for match in ssa_re.finditer(l):
+        have_match = True
+        var = match.groups()[0]
+        if var not in seen_variables:
+            l = l.replace('%' + var, '[[VAR_%s:%%[0-9]+]]' % var)
+            seen_variables.add(var)
+        else:
+            l = l.replace('%' + var, '[[VAR_%s]]' % var)
+    if have_match:
+        l = '// CHECK: ' + l
+    args.o.write(l)