Hexagon backend support

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146413 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/HostInfo.cpp b/lib/Driver/HostInfo.cpp
index 292678b..0e78792 100644
--- a/lib/Driver/HostInfo.cpp
+++ b/lib/Driver/HostInfo.cpp
@@ -575,6 +575,11 @@
 
   ToolChain *&TC = ToolChains[ArchName];
 
+  if (!TC && !Arch.compare ("hexagon")) {
+    llvm::Triple TCTriple (getTriple());
+    TC = new toolchains::Hexagon_TC (*this, TCTriple);
+  }
+
   if (!TC) {
     llvm::Triple TCTriple(getTriple());
     TCTriple.setArchName(ArchName);