[PATCH] SanitizerArgs: add ability to filter/diagnose unsupported sanitizers.

[Alexey Samsonov]

================
Comment at: lib/Driver/SanitizerArgs.cpp:245
@@ +244,3 @@
+        TC.getTriple().getArch() == llvm::Triple::x86_64)) {
+    filterUnsupportedKind(TC, Kinds, Memory, "-fsanitize=memory",
+                          DiagnoseErrors);
----------------
-fsanitize=thread is also unsupported in this case.

================
Comment at: lib/Driver/ToolChains.cpp:300
@@ -299,3 +299,3 @@
   if (Sanitize.needsUbsanRt()) {
     if (isTargetIPhoneOS()) {
       getDriver().Diag(diag::err_drv_clang_unsupported_per_platform)
----------------
Can you move this piece to filterUnsupportedKinds?

================
Comment at: lib/Driver/ToolChains.cpp:314
@@ -313,3 +313,3 @@
   if (Sanitize.needsAsanRt()) {
     if (isTargetIPhoneOS() && !isTargetIOSSimulator()) {
       getDriver().Diag(diag::err_drv_clang_unsupported_per_platform)
----------------
Can you move this piece to filterUnsupportedKinds?

================
Comment at: lib/Driver/SanitizerArgs.cpp:231
@@ +230,3 @@
+                                          bool DiagnoseErrors) {
+  if (Kinds & Kind) {
+    Kinds &= ~Kind;
----------------
Do an early return here instead.


http://llvm-reviews.chandlerc.com/D1990