diff --git a/clang/include/clang/Driver/CLCompatOptions.td b/clang/include/clang/Driver/CLCompatOptions.td
index ce5a435..ca23f7b 100644
--- a/clang/include/clang/Driver/CLCompatOptions.td
+++ b/clang/include/clang/Driver/CLCompatOptions.td
@@ -395,6 +395,8 @@
 
 // Unsupported:
 
+def _SLASH_await : CLFlag<"await">;
+def _SLASH_constexpr : CLJoined<"constexpr:">;
 def _SLASH_AI : CLJoinedOrSeparate<"AI">;
 def _SLASH_Bt : CLFlag<"Bt">;
 def _SLASH_Bt_plus : CLFlag<"Bt+">;
@@ -430,6 +432,9 @@
 def _SLASH_QIfist : CLFlag<"QIfist">;
 def _SLASH_Qimprecise_fwaits : CLFlag<"Qimprecise_fwaits">;
 def _SLASH_Qpar : CLFlag<"Qpar">;
+def _SLASH_Qpar_report : CLJoined<"Qpar-report">;
+def _SLASH_Qsafe_fp_loads : CLFlag<"Qsafe_fp_loads">;
+def _SLASH_Qspectre : CLFlag<"Qspectre">;
 def _SLASH_Qvec_report : CLJoined<"Qvec-report">;
 def _SLASH_u : CLFlag<"u">;
 def _SLASH_V : CLFlag<"V">;
diff --git a/clang/test/Driver/cl-options.c b/clang/test/Driver/cl-options.c
index 1fa2ae3..909e391 100644
--- a/clang/test/Driver/cl-options.c
+++ b/clang/test/Driver/cl-options.c
@@ -390,6 +390,8 @@
 // Unsupported but parsed options. Check that we don't error on them.
 // (/Zs is for syntax-only)
 // RUN: %clang_cl /Zs \
+// RUN:     /await \
+// RUN:     /constexpr:depth1000 /constexpr:backtrace1000 /constexpr:steps1000 \
 // RUN:     /AIfoo \
 // RUN:     /AI foo_does_not_exist \
 // RUN:     /Bt \
@@ -443,6 +445,9 @@
 // RUN:     /QIfist \
 // RUN:     /Qimprecise_fwaits \
 // RUN:     /Qpar \
+// RUN:     /Qpar-report:1 \
+// RUN:     /Qsafe_fp_loads \
+// RUN:     /Qspectre \
 // RUN:     /Qvec-report:2 \
 // RUN:     /u \
 // RUN:     /V \