Index: clang/lib/Frontend/CompilerInvocation.cpp
===================================================================
--- clang/lib/Frontend/CompilerInvocation.cpp
+++ clang/lib/Frontend/CompilerInvocation.cpp
@@ -2927,10 +2927,11 @@
   Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
   Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
-  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
+  Opts.Triple = Args.getLastArgValue(OPT_triple);
   // Use the default target triple if unspecified.
   if (Opts.Triple.empty())
     Opts.Triple = llvm::sys::getDefaultTargetTriple();
+  Opts.Triple = llvm::Triple::normalize(Opts.Triple);
   Opts.OpenCLExtensionsAsWritten = Args.getAllArgValues(OPT_cl_ext_EQ);
   Opts.ForceEnableInt128 = Args.hasArg(OPT_fforce_enable_int128);
   Opts.NVPTXUseShortPointers = Args.hasFlag(
Index: llvm/cmake/modules/GetHostTriple.cmake
===================================================================
--- llvm/cmake/modules/GetHostTriple.cmake
+++ llvm/cmake/modules/GetHostTriple.cmake
@@ -4,15 +4,15 @@
 function( get_host_triple var )
   if( MSVC )
     if( CMAKE_SIZEOF_VOID_P EQUAL 8 )
-      set( value "x86_64-pc-win32" )
+      set( value "x86_64-pc-windows-msvc" )
     else()
-      set( value "i686-pc-win32" )
+      set( value "i686-pc-windows-msvc" )
     endif()
   elseif( MINGW AND NOT MSYS )
     if( CMAKE_SIZEOF_VOID_P EQUAL 8 )
-      set( value "x86_64-w64-mingw32" )
+      set( value "x86_64-w64-windows-gnu" )
     else()
-      set( value "i686-pc-mingw32" )
+      set( value "i686-pc-windows-gnu" )
     endif()
   else( MSVC )
     set(config_guess ${LLVM_MAIN_SRC_DIR}/cmake/config.guess)
Index: llvm/lib/Support/Unix/Host.inc
===================================================================
--- llvm/lib/Support/Unix/Host.inc
+++ llvm/lib/Support/Unix/Host.inc
@@ -64,5 +64,5 @@
     TargetTripleString = EnvTriple;
 #endif
 
-  return Triple::normalize(TargetTripleString);
+  return TargetTripleString;
 }
Index: llvm/lib/Support/Windows/Host.inc
===================================================================
--- llvm/lib/Support/Windows/Host.inc
+++ llvm/lib/Support/Windows/Host.inc
@@ -30,5 +30,5 @@
     Triple = EnvTriple;
 #endif
 
-  return Triple::normalize(Triple);
+  return Triple;
 }
Index: llvm/utils/lit/lit/llvm/config.py
===================================================================
--- llvm/utils/lit/lit/llvm/config.py
+++ llvm/utils/lit/lit/llvm/config.py
@@ -232,31 +232,31 @@
         return False
 
     def make_itanium_abi_triple(self, triple):
-        m = re.match(r'(\w+)-(\w+)-(\w+)', triple)
+        m = re.match(r'(\w+)-(\w+)-(\w+)(?:-(\w+))?', triple)
         if not m:
             self.lit_config.fatal(
                 "Could not turn '%s' into Itanium ABI triple" % triple)
-        if m.group(3).lower() != 'win32':
+        if m.group(3).lower() != 'windows':
             # All non-win32 triples use the Itanium ABI.
             return triple
-        return m.group(1) + '-' + m.group(2) + '-mingw32'
+        return m.group(1) + '-' + m.group(2) + '-' + m.group(3) + '-gnu'
 
     def make_msabi_triple(self, triple):
-        m = re.match(r'(\w+)-(\w+)-(\w+)', triple)
+        m = re.match(r'(\w+)-(\w+)-(\w+)(?:-(\w+))?', triple)
         if not m:
             self.lit_config.fatal(
                 "Could not turn '%s' into MS ABI triple" % triple)
         isa = m.group(1).lower()
         vendor = m.group(2).lower()
         os = m.group(3).lower()
-        if os == 'win32':
+        if os == 'windows':
             # If the OS is win32, we're done.
             return triple
         if isa.startswith('x86') or isa == 'amd64' or re.match(r'i\d86', isa):
             # For x86 ISAs, adjust the OS.
-            return isa + '-' + vendor + '-win32'
-        # -win32 is not supported for non-x86 targets; use a default.
-        return 'i686-pc-win32'
+            return isa + '-' + vendor + 'windows-msvc'
+        # -msvc is not supported for non-x86 targets; use a default.
+        return 'i686-pc-windows-msvc'
 
     def add_tool_substitutions(self, tools, search_dirs=None):
         if not search_dirs: