Normalize target triple passed out of driver. Basically this means

that at cc1 level we will always have normalized triple and thus can
provide necessary default based on e.g. environment value (e.g. for
"arm-eabi" triple, etc.)

llvm-svn: 127087

clang/lib/Driver/Driver.cpp

@@ -1323,7 +1323,7 @@ std::string Driver::GetTemporaryPath(const char *Suffix) const {
 
 const HostInfo *Driver::GetHostInfo(const char *TripleStr) const {
   llvm::PrettyStackTraceString CrashInfo("Constructing host");
-  llvm::Triple Triple(TripleStr);
+  llvm::Triple Triple(llvm::Triple::normalize(TripleStr).c_str());
 
   // TCE is an osless target
   if (Triple.getArchName() == "tce")