Index: llvm/utils/lit/lit/cl_arguments.py
===================================================================
--- llvm/utils/lit/lit/cl_arguments.py
+++ llvm/utils/lit/lit/cl_arguments.py
@@ -118,6 +118,11 @@
     execution_group.add_argument("--xunit-xml-output",
             type=lit.reports.XunitReport,
             help="Write XUnit-compatible XML test reports to the specified file")
+    execution_group.add_argument("--reduced-xunit-report",
+            dest="reducedXUnitReport",
+            help="When writing an XUNit test report, do not include results for "
+                 "tests that completed successfully or were not run",
+            action="store_true")
     execution_group.add_argument("--resultdb-output",
             type=lit.reports.ResultDBReport,
             help="Write LuCI ResuldDB compatible JSON to the specified file")
Index: llvm/utils/lit/lit/main.py
===================================================================
--- llvm/utils/lit/lit/main.py
+++ llvm/utils/lit/lit/main.py
@@ -118,7 +118,7 @@
 
     tests_for_report = selected_tests if opts.shard else discovered_tests
     for report in opts.reports:
-        report.write_results(tests_for_report, elapsed)
+        report.write_results(tests_for_report, elapsed, opts)
 
     if lit_config.numErrors:
         sys.stderr.write('\n%d error(s) in tests\n' % lit_config.numErrors)
Index: llvm/utils/lit/lit/reports.py
===================================================================
--- llvm/utils/lit/lit/reports.py
+++ llvm/utils/lit/lit/reports.py
@@ -19,14 +19,17 @@
         self.output_file = output_file
         self.skipped_codes = {lit.Test.EXCLUDED,
                               lit.Test.SKIPPED, lit.Test.UNSUPPORTED}
+        self.failed_codes = {lit.Test.UNRESOLVED, lit.Test.TIMEOUT,
+                             lit.Test.FAIL, lit.Test.XPASS}
 
     @abc.abstractmethod
-    def write_results(self, tests, elapsed):
+    def write_results(self, tests, elapsed, opts):
         ...
 
 
 class JsonReport(_ReportBase):
-    def write_results(self, tests, elapsed):
+    def write_results(self, tests, elapsed, opts):
+        del opts
         unexecuted_codes = {lit.Test.EXCLUDED, lit.Test.SKIPPED}
         tests = [t for t in tests if t.result.code not in unexecuted_codes]
         # Construct the data we will write.
@@ -93,7 +96,9 @@
 
 
 class XunitReport(_ReportBase):
-    def write_results(self, tests, elapsed):
+    def write_results(self, tests, elapsed, opts):
+
+        reduced_report = opts.reducedXUnitReport
         tests.sort(key=by_suite_and_test_path)
         tests_by_suite = itertools.groupby(tests, lambda t: t.suite)
 
@@ -101,16 +106,18 @@
             file.write('<?xml version="1.0" encoding="UTF-8"?>\n')
             file.write('<testsuites time="{time:.2f}">\n'.format(time=elapsed))
             for suite, test_iter in tests_by_suite:
-                self._write_testsuite(file, suite, list(test_iter))
+                self._write_testsuite(file, suite, list(test_iter), reduced_report)
             file.write('</testsuites>\n')
 
-    def _write_testsuite(self, file, suite, tests):
+    def _write_testsuite(self, file, suite, tests, reduced_report):
         skipped = sum(1 for t in tests if t.result.code in self.skipped_codes)
         failures = sum(1 for t in tests if t.isFailure())
 
         name = suite.config.name.replace('.', '-')
         file.write(f'<testsuite name={quo(name)} tests="{len(tests)}" failures="{failures}" skipped="{skipped}">\n')
         for test in tests:
+            if reduced_report and test.result.code not in self.failed_codes:
+                continue
             self._write_test(file, test, name)
         file.write('</testsuite>\n')
 
@@ -195,7 +202,8 @@
 
 
 class ResultDBReport(_ReportBase):
-    def write_results(self, tests, elapsed):
+    def write_results(self, tests, elapsed, opts):
+        del opts
         unexecuted_codes = {lit.Test.EXCLUDED, lit.Test.SKIPPED}
         tests = [t for t in tests if t.result.code not in unexecuted_codes]
         data = {}
@@ -240,8 +248,8 @@
 
 
 class TimeTraceReport(_ReportBase):
-    def write_results(self, tests, elapsed):
-        del elapsed
+    def write_results(self, tests, elapsed, opts):
+        del elapsed, opts
 
         # Find when first test started so we can make start times relative.
         first_start_time = min([t.result.start for t in tests])