LLVM: add support for asmjs arch and Emscripten OS

include/llvm/ADT/Triple.h

Index: include/llvm/ADT/Triple.h
diff --git a/include/llvm/ADT/Triple.h b/include/llvm/ADT/Triple.h
index 419b8e9622a842648015ef11b65fcabe742d14be..956d0e7416b0c6fc47c88ba202bde2ef0f160872 100644
--- a/include/llvm/ADT/Triple.h
+++ b/include/llvm/ADT/Triple.h
@@ -73,6 +73,7 @@ public:
     nvptx64,    // NVPTX: 64-bit
     le32,       // le32: generic little-endian 32-bit CPU (PNaCl / Emscripten)
     le64,       // le64: generic little-endian 64-bit CPU (PNaCl / Emscripten)
+    asmjs,      // asm.js JavaScript subset @LOCALMOD Emscripten
     amdil,      // AMDIL
     amdil64,    // AMDIL with 64-bit pointers
     hsail,      // AMD HSAIL
@@ -133,6 +134,7 @@ public:
     Haiku,
     Minix,
     RTEMS,
+    Emscripten, // Emscripten JavaScript runtime @LOCALMOD Emscripten
     NaCl,       // Native Client
     CNK,        // BG/P Compute-Node Kernel
     Bitrig,
@@ -378,6 +380,30 @@ public:
   bool isOSMSVCRT() const { return false; }
   bool isOSWindows() const { return false; }
   bool isOSNaCl() const { return true; }
+  bool isOSEmscripten() const { return false; }
+  bool isOSLinux() const { return false; }
+  bool isOSBinFormatELF() const { return true; }
+  bool isOSBinFormatCOFF() const { return false; }
+  bool isOSBinFormatMachO() const { return false; }
+#elif defined(__EMSCRIPTEN__)
+  bool isMacOSX() const { return false; }
+  bool isiOS() const { return false; }
+  bool isOSDarwin() const { return false; }
+  bool isOSNetBSD() const { return false; }
+  bool isOSOpenBSD() const { return false; }
+  bool isOSFreeBSD() const { return false; }
+  bool isOSSolaris() const { return false; }
+  bool isOSBitrig() const { return false; }
+  bool isWindowsMSVCEnvironment() const { return false; }
+  bool isKnownWindowsMSVCEnvironment() const { return false; }
+  bool isWindowsItaniumEnvironment() const { return false; }
+  bool isWindowsCygwinEnvironment() const { return false; }
+  bool isWindowsGNUEnvironment() const { return false; }
+  bool isOSCygMing() const { return false; }
+  bool isOSMSVCRT() const { return false; }
+  bool isOSWindows() const { return false; }
+  bool isOSNaCl() const { return false; }
+  bool isOSEmscripten() const { return true; }
   bool isOSLinux() const { return false; }
   bool isOSBinFormatELF() const { return true; }
   bool isOSBinFormatCOFF() const { return false; }
@@ -462,6 +488,13 @@ public:
     return getOS() == Triple::NaCl;
   }
 
+  // @LOCALMOD-START Emscripten
+  /// \brief Tests whether the OS is Emscripten.
+  bool isOSEmscripten() const {
+    return getOS() == Triple::Emscripten;
+  }
+  // @LOCALMOD-END Emscripten
+
   /// \brief Tests whether the OS is Linux.
   bool isOSLinux() const {
     return getOS() == Triple::Linux;