Remove support for the IOS_SIMULATOR_DEPLOYMENT_TARGET env var.

It turns out that this was never used. Instead we just use the
IPHONEOS_DEPLOYMENT_TARGET variable for both iOS devices and simulator.
rdar://problem/18596744

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@219467 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Basic/DiagnosticDriverKinds.td

@@ -102,8 +102,6 @@ def err_drv_cc_print_options_failure : Error<
     "unable to open CC_PRINT_OPTIONS file: %0">;
 def err_drv_preamble_format : Error<
     "incorrect format for -preamble-bytes=N,END">;
-def err_drv_conflicting_deployment_targets : Error<
-  "conflicting deployment targets, both '%0' and '%1' are present in environment">;
 def err_drv_invalid_arch_for_deployment_target : Error<
   "invalid architecture '%0' for deployment target '%1'">;
 def err_drv_objc_gc_arr : Error<

lib/Driver/ToolChains.cpp

@@ -474,13 +474,10 @@ void Darwin::AddDeploymentTarget(DerivedArgList &Args) const {
     // environment defines.
     StringRef OSXTarget;
     StringRef iOSTarget;
-    StringRef iOSSimTarget;
     if (char *env = ::getenv("MACOSX_DEPLOYMENT_TARGET"))
       OSXTarget = env;
     if (char *env = ::getenv("IPHONEOS_DEPLOYMENT_TARGET"))
       iOSTarget = env;
-    if (char *env = ::getenv("IOS_SIMULATOR_DEPLOYMENT_TARGET"))
-      iOSSimTarget = env;
 
     // If no '-miphoneos-version-min' specified on the command line and
     // IPHONEOS_DEPLOYMENT_TARGET is not defined, see if we can set the default
@@ -503,18 +500,6 @@ void Darwin::AddDeploymentTarget(DerivedArgList &Args) const {
          MachOArchName == "arm64"))
         iOSTarget = iOSVersionMin;
 
-    // Handle conflicting deployment targets
-    //
-    // FIXME: Don't hardcode default here.
-
-    // Do not allow conflicts with the iOS simulator target.
-    if (!iOSSimTarget.empty() && (!OSXTarget.empty() || !iOSTarget.empty())) {
-      getDriver().Diag(diag::err_drv_conflicting_deployment_targets)
-        << "IOS_SIMULATOR_DEPLOYMENT_TARGET"
-        << (!OSXTarget.empty() ? "MACOSX_DEPLOYMENT_TARGET" :
-            "IPHONEOS_DEPLOYMENT_TARGET");
-    }
-
     // Allow conflicts among OSX and iOS for historical reasons, but choose the
     // default platform.
     if (!OSXTarget.empty() && !iOSTarget.empty()) {
@@ -534,11 +519,6 @@ void Darwin::AddDeploymentTarget(DerivedArgList &Args) const {
       const Option O = Opts.getOption(options::OPT_miphoneos_version_min_EQ);
       iOSVersion = Args.MakeJoinedArg(nullptr, O, iOSTarget);
       Args.append(iOSVersion);
-    } else if (!iOSSimTarget.empty()) {
-      const Option O = Opts.getOption(
-        options::OPT_mios_simulator_version_min_EQ);
-      iOSSimVersion = Args.MakeJoinedArg(nullptr, O, iOSSimTarget);
-      Args.append(iOSSimVersion);
     } else if (MachOArchName != "armv6m" && MachOArchName != "armv7m" &&
                MachOArchName != "armv7em") {
       // Otherwise, assume we are targeting OS X.

test/lit.cfg

@@ -73,7 +73,6 @@ config.llvm_obj_root = getattr(config, 'llvm_obj_root', None)
 
 # safe_env_vars = ('TMPDIR', 'TEMP', 'TMP', 'USERPROFILE', 'PWD',
 #                  'MACOSX_DEPLOYMENT_TARGET', 'IPHONEOS_DEPLOYMENT_TARGET',
-#                  'IOS_SIMULATOR_DEPLOYMENT_TARGET',
 #                  'VCINSTALLDIR', 'VC100COMNTOOLS', 'VC90COMNTOOLS',
 #                  'VC80COMNTOOLS')
 possibly_dangerous_env_vars = ['COMPILER_PATH', 'RC_DEBUG_OPTIONS',