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diff --git a/test/ubsan/TestCases/Misc/coverage-levels.cc b/test/ubsan/TestCases/Misc/coverage-levels.cc
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+// Test various levels of coverage
+//
+// FIXME: Port the environment variable logic below for the lit shell.
+// REQUIRES: shell
+//
+// RUN: mkdir -p %T/coverage-levels
+// RUN: %clangxx -fsanitize=shift -DGOOD_SHIFT=1 -O1 -fsanitize-coverage=func %s -o %t
+// RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir=%T/coverage-levels %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_NOWARN
+// RUN: %clangxx -fsanitize=undefined -DGOOD_SHIFT=1 -O1 -fsanitize-coverage=func %s -o %t
+// RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir=%T/coverage-levels %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_NOWARN
+
+// RUN: %clangxx -fsanitize=shift -O1 -fsanitize-coverage=func %s -o %t
+// RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir=%T/coverage-levels %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_WARN
+// RUN: %clangxx -fsanitize=shift -O1 -fsanitize-coverage=bb %s -o %t
+// RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir=%T/coverage-levels %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2 --check-prefix=CHECK_WARN
+// RUN: %clangxx -fsanitize=shift -O1 -fsanitize-coverage=edge %s -o %t
+// RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir=%T/coverage-levels %run %t 2>&1 | FileCheck %s --check-prefix=CHECK3 --check-prefix=CHECK_WARN
+
+// Coverage is not yet implemented in TSan.
+// XFAIL: ubsan-tsan
+
+volatile int sink;
+int main(int argc, char **argv) {
+ int shift = argc * 32;
+#if GOOD_SHIFT
+ shift = 3;
+#endif
+ if ((argc << shift) == 16) // False.
+ return 1;
+ return 0;
+}
+
+// CHECK_WARN: shift exponent 32 is too large
+// CHECK_NOWARN-NOT: ERROR
+// FIXME: Currently, coverage instrumentation kicks in after ubsan, so we get
+// more than the minimal number of instrumented blocks.
+// FIXME: Currently, ubsan with -fno-sanitize-recover and w/o asan will fail
+// to dump coverage.
+// CHECK1: 1 PCs written
+// CHECK2: 3 PCs written
+// CHECK3: 3 PCs written