LLVM: add support for asmjs arch and Emscripten OS

lib/Support/Triple.cpp

Index: lib/Support/Triple.cpp
diff --git a/lib/Support/Triple.cpp b/lib/Support/Triple.cpp
index 332606a683904f7a506b2dffb943bc9c1b98d382..d436b493e85fecf4c3be7898a4929b3884f560b0 100644
--- a/lib/Support/Triple.cpp
+++ b/lib/Support/Triple.cpp
@@ -46,6 +46,7 @@ const char *Triple::getArchTypeName(ArchType Kind) {
   case nvptx64:     return "nvptx64";
   case le32:        return "le32";
   case le64:        return "le64";
+  case asmjs:       return "asmjs"; // @LOCALMOD Emscripten
   case amdil:       return "amdil";
   case amdil64:     return "amdil64";
   case hsail:       return "hsail";
@@ -100,6 +101,8 @@ const char *Triple::getArchTypePrefix(ArchType Kind) {
   case le32:        return "le32";
   case le64:        return "le64";
 
+  case asmjs:       return "asmjs"; // @LOCALMOD Emscripten
+
   case amdil:
   case amdil64:     return "amdil";
 
@@ -151,6 +154,7 @@ const char *Triple::getOSTypeName(OSType Kind) {
   case Haiku: return "haiku";
   case Minix: return "minix";
   case RTEMS: return "rtems";
+  case Emscripten: return "emscripten"; // @LOCALMOD Emscripten
   case NaCl: return "nacl";
   case CNK: return "cnk";
   case Bitrig: return "bitrig";
@@ -212,6 +216,7 @@ Triple::ArchType Triple::getArchTypeForLLVMName(StringRef Name) {
     .Case("nvptx64", nvptx64)
     .Case("le32", le32)
     .Case("le64", le64)
+    .Case("asmjs", asmjs) // @LOCALMOD Emscripten
     .Case("amdil", amdil)
     .Case("amdil64", amdil64)
     .Case("hsail", hsail)
@@ -295,6 +300,7 @@ static Triple::ArchType parseArch(StringRef ArchName) {
     .Case("nvptx64", Triple::nvptx64)
     .Case("le32", Triple::le32)
     .Case("le64", Triple::le64)
+    .Case("asmjs", Triple::asmjs) // @LOCALMOD Emscripten
     .Case("amdil", Triple::amdil)
     .Case("amdil64", Triple::amdil64)
     .Case("hsail", Triple::hsail)
@@ -339,6 +345,7 @@ static Triple::OSType parseOS(StringRef OSName) {
     .StartsWith("haiku", Triple::Haiku)
     .StartsWith("minix", Triple::Minix)
     .StartsWith("rtems", Triple::RTEMS)
+    .StartsWith("emscripten", Triple::Emscripten) // @LOCALMOD Emscripten
     .StartsWith("nacl", Triple::NaCl)
     .StartsWith("cnk", Triple::CNK)
     .StartsWith("bitrig", Triple::Bitrig)
@@ -843,6 +850,7 @@ static unsigned getArchPointerBitWidth(llvm::Triple::ArchType Arch) {
   case llvm::Triple::armeb:
   case llvm::Triple::hexagon:
   case llvm::Triple::le32:
+  case llvm::Triple::asmjs: // @LOCALMOD Emscripten
   case llvm::Triple::mips:
   case llvm::Triple::mipsel:
   case llvm::Triple::nvptx:
@@ -911,6 +919,7 @@ Triple Triple::get32BitArchVariant() const {
   case Triple::hexagon:
   case Triple::kalimba:
   case Triple::le32:
+  case Triple::asmjs: // @LOCALMOD Emscripten
   case Triple::mips:
   case Triple::mipsel:
   case Triple::nvptx:
@@ -953,6 +962,7 @@ Triple Triple::get64BitArchVariant() const {
   case Triple::thumb:
   case Triple::thumbeb:
   case Triple::xcore:
+  case Triple::asmjs: // @LOCALMOD Emscripten
     T.setArch(UnknownArch);
     break;