Add a Musl environment to the triple.

It will be used in clang.

Patch by Lei Zhang.

llvm-svn: 272660

Author: espindola

llvm/include/llvm/ADT/Triple.h

@@ -179,6 +179,7 @@ class Triple {
     EABI,
     EABIHF,
     Android,
+    Musl,
 
     MSVC,
     Itanium,

llvm/lib/Support/Triple.cpp

@@ -205,6 +205,7 @@ const char *Triple::getEnvironmentTypeName(EnvironmentType Kind) {
   case EABI: return "eabi";
   case EABIHF: return "eabihf";
   case Android: return "android";
+  case Musl: return "musl";
   case MSVC: return "msvc";
   case Itanium: return "itanium";
   case Cygnus: return "cygnus";
@@ -464,6 +465,7 @@ static Triple::EnvironmentType parseEnvironment(StringRef EnvironmentName) {
     .StartsWith("code16", Triple::CODE16)
     .StartsWith("gnu", Triple::GNU)
     .StartsWith("android", Triple::Android)
+    .StartsWith("musl", Triple::Musl)
     .StartsWith("msvc", Triple::MSVC)
     .StartsWith("itanium", Triple::Itanium)
     .StartsWith("cygnus", Triple::Cygnus)

llvm/unittests/ADT/TripleTest.cpp

@@ -93,6 +93,12 @@ TEST(TripleTest, ParsedIDs) {
   EXPECT_EQ(Triple::Linux, T.getOS());
   EXPECT_EQ(Triple::GNU, T.getEnvironment());
 
+  T = Triple("x86_64-pc-linux-musl");
+  EXPECT_EQ(Triple::x86_64, T.getArch());
+  EXPECT_EQ(Triple::PC, T.getVendor());
+  EXPECT_EQ(Triple::Linux, T.getOS());
+  EXPECT_EQ(Triple::Musl, T.getEnvironment());
+
   T = Triple("powerpc-bgp-linux");
   EXPECT_EQ(Triple::ppc, T.getArch());
   EXPECT_EQ(Triple::BGP, T.getVendor());