Add testcases for -fparse-all-comments


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179181 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Driver/fparse-all-comments.c b/test/Driver/fparse-all-comments.c
new file mode 100644
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--- /dev/null
+++ b/test/Driver/fparse-all-comments.c
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+// Check that we pass -fparse-all-comments to frontend.
+//
+// RUN: %clang -c %s -fparse-all-comments -### 2>&1 | FileCheck %s --check-prefix=CHECK-ARG
+//
+// CHECK-ARG: -fparse-all-comments