Add QEMU args to lit

[EricWF]

Adding self as a reviewer. I'll take a look at this tomorrow night.

[EricWF]

This revision seems to be dead. Removing it as house keeping.

[jroelofs]

Oh yeah. These were dead even before I put them up.

llvm/utils/lit/lit/LitConfig.py

     """
 
     def __init__(self, progname, path, quiet,
-                 useValgrind, valgrindLeakCheck, valgrindArgs,
+                 useQEMU, qemuArgs, useValgrind, valgrindLeakCheck, valgrindArgs,
                  noExecute, debug, isWindows,
                  params, config_prefix = None):
         # The name of the test runner.

         # The items to add to the PATH environment variable.
         self.path = [str(p) for p in path]
         self.quiet = bool(quiet)
+        self.useQEMU = bool(useQEMU)
+        self.qemuUserArgs = list(qemuArgs)
         self.useValgrind = bool(useValgrind)
         self.valgrindLeakCheck = bool(valgrindLeakCheck)
         self.valgrindUserArgs = list(valgrindArgs)

         self.numErrors = 0
         self.numWarnings = 0
 
+        self.qemuArgs = []
+        if self.useQEMU:
+            self.qemuArgs.extend(self.qemuUserArgs)
+
         self.valgrindArgs = []
         if self.useValgrind:
             self.valgrindArgs = ['valgrind', '-q', '--run-libc-freeres=no',

llvm/utils/lit/lit/TestingConfig.py

             available_features.append('valgrind')
             if litConfig.valgrindLeakCheck:
                 available_features.append('vg_leak')
+        if litConfig.useQEMU:
+            available_features.append('qemu')
 
         return TestingConfig(None,
                              name = '<unnamed>',

llvm/utils/lit/lit/discovery.py

     litConfig = LitConfig.LitConfig(progname = 'lit',
                                     path = [],
                                     quiet = False,
+                                    useQEMU = False,
+                                    qemuArgs = [],
                                     useValgrind = False,
                                     valgrindLeakCheck = False,
                                     valgrindArgs = [],

llvm/utils/lit/lit/main.py

     group.add_option("", "--path", dest="path",
                      help="Additional paths to add to testing environment",
                      action="append", type=str, default=[])
+    group.add_option("", "--qemu", dest="useQEMU",
+                     help="Run tests via QEMU",
+                     action="store_true", default=False)
+    group.add_option("", "--qemu-arg", dest="qemuArgs", metavar="ARG",
+                     help="Specify arguments for QEMU",
+                     action="append", default=[])
     group.add_option("", "--vg", dest="useValgrind",
                      help="Run tests under valgrind",
                      action="store_true", default=False)

         progname = os.path.basename(sys.argv[0]),
         path = opts.path,
         quiet = opts.quiet,
+        useQEMU = opts.useQEMU,
+        qemuArgs = opts.qemuArgs,
         useValgrind = opts.useValgrind,
         valgrindLeakCheck = opts.valgrindLeakCheck,
         valgrindArgs = opts.valgrindArgs,