1 files changed, 13 insertions, 1 deletions
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 17552b28763..3bda71597e3 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -1671,7 +1671,8 @@ bool Driver::HandleImmediateArgs(const Compilation &C) {
   }
 
   if (C.getArgs().hasArg(options::OPT_v) ||
-      C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
+      C.getArgs().hasArg(options::OPT__HASH_HASH_HASH) ||
+      C.getArgs().hasArg(options::OPT__print_supported_cpus)) {
     PrintVersion(C, llvm::errs());
     SuppressMissingInputWarning = true;
   }
@@ -3375,6 +3376,17 @@ void Driver::BuildActions(Compilation &C, DerivedArgList &Args,
     Args.ClaimAllArgs(options::OPT_cl_compile_Group);
   }
 
+  // If the use specify --print-supported-cpus, clang will only print out
+  // supported cpu names without doing compilation.
+  if (Arg *A = Args.getLastArg(options::OPT__print_supported_cpus)) {
+    Actions.clear();
+    // the compilation now has only two phases: Input and Compile
+    // use the --prints-supported-cpus flag as the dummy input to cc1
+    Action *InputAc = C.MakeAction<InputAction>(*A, types::TY_C);
+    Actions.push_back(
+        C.MakeAction<PrecompileJobAction>(InputAc, types::TY_Nothing));
+  }
+
   // Claim ignored clang-cl options.
   Args.ClaimAllArgs(options::OPT_cl_ignored_Group);