clang-cl: Ignore the new /ZH options

These were added to the MS docs in
MicrosoftDocs/cpp-docs@85b9b69
and are supposedly available in VS 2019 16.4 (though my 2019 Preview,
version 16.4.0-pre.1.0 don't seem to have them.)

llvm-svn: 373887

Author: zmodem

clang/include/clang/Driver/CLCompatOptions.td

@@ -401,6 +401,9 @@ def _SLASH_Zc_inline : CLIgnoredFlag<"Zc:inline">;
 def _SLASH_Zc_rvalueCast : CLIgnoredFlag<"Zc:rvalueCast">;
 def _SLASH_Zc_ternary : CLIgnoredFlag<"Zc:ternary">;
 def _SLASH_Zc_wchar_t : CLIgnoredFlag<"Zc:wchar_t">;
+def _SLASH_ZH_MD5 : CLIgnoredFlag<"ZH:MD5">;
+def _SLASH_ZH_SHA1 : CLIgnoredFlag<"ZH:SHA1">;
+def _SLASH_ZH_SHA_256 : CLIgnoredFlag<"ZH:SHA_256">;
 def _SLASH_Zm : CLIgnoredJoined<"Zm">;
 def _SLASH_Zo : CLIgnoredFlag<"Zo">;
 def _SLASH_Zo_ : CLIgnoredFlag<"Zo-">;

clang/test/Driver/cl-options.c

@@ -377,6 +377,9 @@
 // RUN:    /Zc:rvalueCast \
 // RUN:    /Zc:ternary \
 // RUN:    /Zc:wchar_t \
+// RUN:    /ZH:MD5 \
+// RUN:    /ZH:SHA1 \
+// RUN:    /ZH:SHA_256 \
 // RUN:    /Zm \
 // RUN:    /Zo \
 // RUN:    /Zo- \