[clang][driver][darwin] Enforce consistent major version limit for any Darwin OS

Limit can also be bumped up to 999 to allow OS versions over 100

Author: hyp

clang/lib/Driver/ToolChains/Darwin.cpp

@@ -2187,17 +2187,20 @@ void Darwin::AddDeploymentTarget(DerivedArgList &Args) const {
 
   unsigned Major, Minor, Micro;
   bool HadExtra;
+  // The major version should not be over this number.
+  const unsigned MajorVersionLimit = 1000;
   // Set the tool chain target information.
   if (Platform == MacOS) {
     if (!Driver::GetReleaseVersion(OSTarget->getOSVersion(), Major, Minor,
                                    Micro, HadExtra) ||
-        HadExtra || Major < 10 || Major >= 100 || Minor >= 100 || Micro >= 100)
+        HadExtra || Major < 10 || Major >= MajorVersionLimit || Minor >= 100 ||
+        Micro >= 100)
       getDriver().Diag(diag::err_drv_invalid_version_number)
           << OSTarget->getAsString(Args, Opts);
   } else if (Platform == IPhoneOS) {
     if (!Driver::GetReleaseVersion(OSTarget->getOSVersion(), Major, Minor,
                                    Micro, HadExtra) ||
-        HadExtra || Major >= 100 || Minor >= 100 || Micro >= 100)
+        HadExtra || Major >= MajorVersionLimit || Minor >= 100 || Micro >= 100)
       getDriver().Diag(diag::err_drv_invalid_version_number)
           << OSTarget->getAsString(Args, Opts);
     ;
@@ -2229,19 +2232,20 @@ void Darwin::AddDeploymentTarget(DerivedArgList &Args) const {
   } else if (Platform == TvOS) {
     if (!Driver::GetReleaseVersion(OSTarget->getOSVersion(), Major, Minor,
                                    Micro, HadExtra) ||
-        HadExtra || Major >= 100 || Minor >= 100 || Micro >= 100)
+        HadExtra || Major >= MajorVersionLimit || Minor >= 100 || Micro >= 100)
       getDriver().Diag(diag::err_drv_invalid_version_number)
           << OSTarget->getAsString(Args, Opts);
   } else if (Platform == WatchOS) {
     if (!Driver::GetReleaseVersion(OSTarget->getOSVersion(), Major, Minor,
                                    Micro, HadExtra) ||
-        HadExtra || Major >= 10 || Minor >= 100 || Micro >= 100)
+        HadExtra || Major >= MajorVersionLimit || Minor >= 100 || Micro >= 100)
       getDriver().Diag(diag::err_drv_invalid_version_number)
           << OSTarget->getAsString(Args, Opts);
   } else if (Platform == DriverKit) {
     if (!Driver::GetReleaseVersion(OSTarget->getOSVersion(), Major, Minor,
                                    Micro, HadExtra) ||
-        HadExtra || Major < 19 || Major >= 100 || Minor >= 100 || Micro >= 100)
+        HadExtra || Major < 19 || Major >= MajorVersionLimit || Minor >= 100 ||
+        Micro >= 100)
       getDriver().Diag(diag::err_drv_invalid_version_number)
           << OSTarget->getAsString(Args, Opts);
   } else

clang/test/Driver/darwin-version.c

@@ -332,3 +332,18 @@
 // RUN:   FileCheck --check-prefix=CHECK-MACOS11 %s
 
 // CHECK-MACOS11: "x86_64-apple-macosx11.0.0"
+
+// RUN: %clang -target arm64-apple-macos999 -c %s -### 2>&1 | \
+// RUN:   FileCheck --check-prefix=CHECK-MACOS999 %s
+
+// CHECK-MACOS999: "arm64-apple-macosx999.0.0"
+
+// RUN: %clang -target arm64-apple-watchos99 -c %s -### 2>&1 | \
+// RUN:   FileCheck --check-prefix=CHECK-WATCHOS99 %s
+
+// CHECK-WATCHOS99: "arm64-apple-watchos99.0.0"
+
+// RUN: not %clang -target arm64-apple-ios999999 -c %s 2>&1 | \
+// RUN:   FileCheck --check-prefix=CHECK-IOS999999 %s
+
+// CHECK-IOS999999: error: invalid version number in '-target arm64-apple-ios999999'