Define Contiki OS toolchain

Patch by Michael LeMay

Differential revision: http://reviews.llvm.org/D19854

llvm-svn: 284278
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 459f601..f2ee1ca 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -3120,6 +3120,9 @@
     case llvm::Triple::PS4:
       TC = new toolchains::PS4CPU(*this, Target, Args);
       break;
+    case llvm::Triple::Contiki:
+      TC = new toolchains::Contiki(*this, Target, Args);
+      break;
     default:
       // Of these targets, Hexagon is the only one that might have
       // an OS of Linux, in which case it got handled above already.
diff --git a/clang/lib/Driver/ToolChains.cpp b/clang/lib/Driver/ToolChains.cpp
index e71aaf3..93beab8 100644
--- a/clang/lib/Driver/ToolChains.cpp
+++ b/clang/lib/Driver/ToolChains.cpp
@@ -5305,3 +5305,14 @@
   Res |= SanitizerKind::Vptr;
   return Res;
 }
+
+Contiki::Contiki(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
+    : Generic_ELF(D, Triple, Args) {}
+
+SanitizerMask Contiki::getSupportedSanitizers() const {
+  const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
+  SanitizerMask Res = ToolChain::getSupportedSanitizers();
+  if (IsX86)
+    Res |= SanitizerKind::SafeStack;
+  return Res;
+}
diff --git a/clang/lib/Driver/ToolChains.h b/clang/lib/Driver/ToolChains.h
index 36773b2..0838208 100644
--- a/clang/lib/Driver/ToolChains.h
+++ b/clang/lib/Driver/ToolChains.h
@@ -1249,6 +1249,14 @@
   Tool *buildLinker() const override;
 };
 
+class LLVM_LIBRARY_VISIBILITY Contiki : public Generic_ELF {
+public:
+  Contiki(const Driver &D, const llvm::Triple &Triple,
+          const llvm::opt::ArgList &Args);
+
+  SanitizerMask getSupportedSanitizers() const override;
+};
+
 } // end namespace toolchains
 } // end namespace driver
 } // end namespace clang