Use the new Windows environment for target detection

This follows the LLVM change to canonicalise the Windows target triple
spellings.  Rather than treating each Windows environment as a single entity,
the environments are now modelled properly as an environment.  This is a
mechanical change to convert the triple use to reflect that change.

llvm-svn: 204978
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 5cc19f5..914efa6 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -1948,10 +1948,29 @@
       TC = new toolchains::Solaris(*this, Target, Args);
       break;
     case llvm::Triple::Win32:
-      TC = new toolchains::Windows(*this, Target, Args);
+      switch (Target.getEnvironment()) {
+      default:
+        if (Target.isOSBinFormatELF())
+          TC = new toolchains::Generic_ELF(*this, Target, Args);
+        else if (Target.isOSBinFormatMachO())
+          TC = new toolchains::MachO(*this, Target, Args);
+        else
+          TC = new toolchains::Generic_GCC(*this, Target, Args);
+        break;
+      case llvm::Triple::GNU:
+        // FIXME: We need a MinGW toolchain.  Use the default Generic_GCC
+        // toolchain for now as the default case would below otherwise.
+        if (Target.isOSBinFormatELF())
+          TC = new toolchains::Generic_ELF(*this, Target, Args);
+        else
+          TC = new toolchains::Generic_GCC(*this, Target, Args);
+        break;
+      case llvm::Triple::MSVC:
+      case llvm::Triple::UnknownEnvironment:
+        TC = new toolchains::Windows(*this, Target, Args);
+        break;
+      }
       break;
-    case llvm::Triple::MinGW32:
-      // FIXME: We need a MinGW toolchain. Fallthrough for now.
     default:
       // TCE is an OSless target
       if (Target.getArchName() == "tce") {
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 7568151..3106e15 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -681,11 +681,9 @@
       default:
         // Assume "soft", but warn the user we are guessing.
         FloatABI = "soft";
-        // *-macho defaults to "soft"
-        if (Triple.getOS() == llvm::Triple::UnknownOS &&
-            Triple.getObjectFormat() == llvm::Triple::MachO)
-          break;
-        D.Diag(diag::warn_drv_assuming_mfloat_abi_is) << "soft";
+        if (Triple.getOS() != llvm::Triple::UnknownOS ||
+            !Triple.isOSBinFormatMachO())
+          D.Diag(diag::warn_drv_assuming_mfloat_abi_is) << "soft";
         break;
       }
     }
@@ -2103,6 +2101,10 @@
   const Driver &D = getToolChain().getDriver();
   ArgStringList CmdArgs;
 
+  bool IsWindowsGNU = getToolChain().getTriple().isWindowsGNUEnvironment();
+  bool IsWindowsCygnus = getToolChain().getTriple().isWindowsCygwinEnvironment();
+  bool IsWindowsMSVC = getToolChain().getTriple().isWindowsMSVCEnvironment();
+
   assert(Inputs.size() == 1 && "Unable to handle multiple inputs.");
 
   // Invoke ourselves in -cc1 mode.
@@ -2211,7 +2213,7 @@
     if (!Args.hasArg(options::OPT__analyzer_no_default_checks)) {
       CmdArgs.push_back("-analyzer-checker=core");
 
-      if (getToolChain().getTriple().getOS() != llvm::Triple::Win32)
+      if (!IsWindowsMSVC)
         CmdArgs.push_back("-analyzer-checker=unix");
 
       if (getToolChain().getTriple().getVendor() == llvm::Triple::Apple)
@@ -2961,7 +2963,7 @@
     if (!types::isCXX(InputType))
       Args.AddAllArgsTranslated(CmdArgs, options::OPT_std_default_EQ,
                                 "-std=", /*Joined=*/true);
-    else if (getToolChain().getTriple().getOS() == llvm::Triple::Win32)
+    else if (IsWindowsMSVC)
       CmdArgs.push_back("-std=c++11");
 
     Args.AddLastArg(CmdArgs, options::OPT_trigraphs);
@@ -3451,33 +3453,30 @@
     CmdArgs.push_back("-fno-threadsafe-statics");
 
   // -fuse-cxa-atexit is default.
-  if (!Args.hasFlag(
-           options::OPT_fuse_cxa_atexit, options::OPT_fno_use_cxa_atexit,
-           getToolChain().getTriple().getOS() != llvm::Triple::Cygwin &&
-               getToolChain().getTriple().getOS() != llvm::Triple::MinGW32 &&
-               getToolChain().getArch() != llvm::Triple::hexagon &&
-               getToolChain().getArch() != llvm::Triple::xcore) ||
+  if (!Args.hasFlag(options::OPT_fuse_cxa_atexit,
+                    options::OPT_fno_use_cxa_atexit,
+                    !IsWindowsCygnus && !IsWindowsGNU &&
+                    getToolChain().getArch() != llvm::Triple::hexagon &&
+                    getToolChain().getArch() != llvm::Triple::xcore) ||
       KernelOrKext)
     CmdArgs.push_back("-fno-use-cxa-atexit");
 
   // -fms-extensions=0 is default.
   if (Args.hasFlag(options::OPT_fms_extensions, options::OPT_fno_ms_extensions,
-                   getToolChain().getTriple().getOS() == llvm::Triple::Win32))
+                   IsWindowsMSVC))
     CmdArgs.push_back("-fms-extensions");
 
   // -fms-compatibility=0 is default.
   if (Args.hasFlag(options::OPT_fms_compatibility, 
                    options::OPT_fno_ms_compatibility,
-                   (getToolChain().getTriple().getOS() == llvm::Triple::Win32 &&
-                    Args.hasFlag(options::OPT_fms_extensions, 
-                                 options::OPT_fno_ms_extensions,
-                                 true))))
+                   (IsWindowsMSVC && Args.hasFlag(options::OPT_fms_extensions,
+                                                  options::OPT_fno_ms_extensions,
+                                                  true))))
     CmdArgs.push_back("-fms-compatibility");
 
   // -fmsc-version=1700 is default.
   if (Args.hasFlag(options::OPT_fms_extensions, options::OPT_fno_ms_extensions,
-                   getToolChain().getTriple().getOS() == llvm::Triple::Win32) ||
-      Args.hasArg(options::OPT_fmsc_version)) {
+                   IsWindowsMSVC) || Args.hasArg(options::OPT_fmsc_version)) {
     StringRef msc_ver = Args.getLastArgValue(options::OPT_fmsc_version);
     if (msc_ver.empty())
       CmdArgs.push_back("-fmsc-version=1700");
@@ -3494,8 +3493,7 @@
   // -fno-delayed-template-parsing is default, except for Windows where MSVC STL
   // needs it.
   if (Args.hasFlag(options::OPT_fdelayed_template_parsing,
-                   options::OPT_fno_delayed_template_parsing,
-                   getToolChain().getTriple().getOS() == llvm::Triple::Win32))
+                   options::OPT_fno_delayed_template_parsing, IsWindowsMSVC))
     CmdArgs.push_back("-fdelayed-template-parsing");
 
   // -fgnu-keywords default varies depending on language; only pass if
diff --git a/clang/lib/Driver/WindowsToolChain.cpp b/clang/lib/Driver/WindowsToolChain.cpp
index c9328e6..a32a7bf 100644
--- a/clang/lib/Driver/WindowsToolChain.cpp
+++ b/clang/lib/Driver/WindowsToolChain.cpp
@@ -43,7 +43,7 @@
 }
 
 Tool *Windows::buildAssembler() const {
-  if (getTriple().getObjectFormat() == llvm::Triple::MachO)
+  if (getTriple().isOSBinFormatMachO())
     return new tools::darwin::Assemble(*this);
   getDriver().Diag(clang::diag::err_no_external_assembler);
   return NULL;