[WebAssembly] Test the "wasm32-wasi" triple

[sunfish]

Summary

Add triple tests for "wasm32-wasi" and "wasm64-wasi", and also remove the "-musl" component from the existing wasm triple tests as we're not using that in practice (WASI libc is derived in part from musl, but it is not fully musl-compatible).

llvm/trunk/unittests/ADT/TripleTest.cpp

TEST(TripleTest, ParsedIDs) {
   EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
 
   T = Triple("wasm32-unknown-unknown");
   EXPECT_EQ(Triple::wasm32, T.getArch());
   EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
   EXPECT_EQ(Triple::UnknownOS, T.getOS());
   EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
 
-  T = Triple("wasm32-unknown-wasi-musl");
+  T = Triple("wasm32-unknown-wasi");
   EXPECT_EQ(Triple::wasm32, T.getArch());
   EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
   EXPECT_EQ(Triple::WASI, T.getOS());
-  EXPECT_EQ(Triple::Musl, T.getEnvironment());
+  EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
 
   T = Triple("wasm64-unknown-unknown");
   EXPECT_EQ(Triple::wasm64, T.getArch());
   EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
   EXPECT_EQ(Triple::UnknownOS, T.getOS());
   EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
 
-  T = Triple("wasm64-unknown-wasi-musl");
+  T = Triple("wasm64-unknown-wasi");
   EXPECT_EQ(Triple::wasm64, T.getArch());
   EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
   EXPECT_EQ(Triple::WASI, T.getOS());
-  EXPECT_EQ(Triple::Musl, T.getEnvironment());
+  EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
 
   T = Triple("avr-unknown-unknown");
   EXPECT_EQ(Triple::avr, T.getArch());
   EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
   EXPECT_EQ(Triple::UnknownOS, T.getOS());
   EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
 
   T = Triple("avr");
TEST(TripleTest, Normalization) {
   EXPECT_EQ("i486-unknown-linux-gnu",
             Triple::normalize("i486-linux-gnu")); // i486-pc-linux-gnu
   EXPECT_EQ("i386-redhat-linux",
             Triple::normalize("i386-redhat-linux")); // i386-redhat-linux-gnu
   EXPECT_EQ("i686-unknown-linux",
             Triple::normalize("i686-linux")); // i686-pc-linux-gnu
   EXPECT_EQ("arm-none-unknown-eabi",
             Triple::normalize("arm-none-eabi")); // arm-none-eabi
+  EXPECT_EQ("wasm32-unknown-wasi",
+            Triple::normalize("wasm32-wasi")); // wasm32-unknown-wasi
+  EXPECT_EQ("wasm64-unknown-wasi",
+            Triple::normalize("wasm64-wasi")); // wasm64-unknown-wasi
 }
 
 TEST(TripleTest, MutateName) {
   Triple T;
   EXPECT_EQ(Triple::UnknownArch, T.getArch());
   EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
   EXPECT_EQ(Triple::UnknownOS, T.getOS());
   EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
TEST(TripleTest, FileFormat) {
 
   EXPECT_EQ(Triple::COFF, Triple("i686--win32").getObjectFormat());
 
   EXPECT_EQ(Triple::ELF, Triple("i686-pc-windows-msvc-elf").getObjectFormat());
   EXPECT_EQ(Triple::ELF, Triple("i686-pc-cygwin-elf").getObjectFormat());
 
   EXPECT_EQ(Triple::Wasm, Triple("wasm32-unknown-unknown").getObjectFormat());
   EXPECT_EQ(Triple::Wasm, Triple("wasm64-unknown-unknown").getObjectFormat());
-  EXPECT_EQ(Triple::Wasm, Triple("wasm32-unknown-wasi-musl").getObjectFormat());
-  EXPECT_EQ(Triple::Wasm, Triple("wasm64-unknown-wasi-musl").getObjectFormat());
+  EXPECT_EQ(Triple::Wasm, Triple("wasm32-wasi").getObjectFormat());
+  EXPECT_EQ(Triple::Wasm, Triple("wasm64-wasi").getObjectFormat());
+  EXPECT_EQ(Triple::Wasm, Triple("wasm32-unknown-wasi").getObjectFormat());
+  EXPECT_EQ(Triple::Wasm, Triple("wasm64-unknown-wasi").getObjectFormat());
 
   EXPECT_EQ(Triple::Wasm,
             Triple("wasm32-unknown-unknown-wasm").getObjectFormat());
   EXPECT_EQ(Triple::Wasm,
             Triple("wasm64-unknown-unknown-wasm").getObjectFormat());
   EXPECT_EQ(Triple::Wasm,
-            Triple("wasm32-unknown-wasi-musl-wasm").getObjectFormat());
+            Triple("wasm32-wasi-wasm").getObjectFormat());
+  EXPECT_EQ(Triple::Wasm,
+            Triple("wasm64-wasi-wasm").getObjectFormat());
+  EXPECT_EQ(Triple::Wasm,
+            Triple("wasm32-unknown-wasi-wasm").getObjectFormat());
   EXPECT_EQ(Triple::Wasm,
-            Triple("wasm64-unknown-wasi-musl-wasm").getObjectFormat());
+            Triple("wasm64-unknown-wasi-wasm").getObjectFormat());
 
   EXPECT_EQ(Triple::XCOFF, Triple("powerpc-ibm-aix").getObjectFormat());
   EXPECT_EQ(Triple::XCOFF, Triple("powerpc64-ibm-aix").getObjectFormat());
   EXPECT_EQ(Triple::XCOFF, Triple("powerpc---xcoff").getObjectFormat());
   EXPECT_EQ(Triple::XCOFF, Triple("powerpc64---xcoff").getObjectFormat());
 
   Triple MSVCNormalized(Triple::normalize("i686-pc-windows-msvc-elf"));
   EXPECT_EQ(Triple::ELF, MSVCNormalized.getObjectFormat());