ADT: remove MinGW32 and Cygwin OSType enum

Remove the MinGW32 and Cygwin types from the OSType enumeration.  These values
are represented via environments of Windows.  It is a source of confusion and
needlessly clutters the code.  The cost of doing this is that we must sink the
check for them into the normalization code path along with the spelling.

Addresses PR20592.

llvm-svn: 215303

5 files changed, 16 insertions, 19 deletions

diff --git a/llvm/include/llvm/ADT/Triple.h b/llvm/include/llvm/ADT/Triple.h
index cb92763ed43..0dcdc17526b 100644
--- a/llvm/include/llvm/ADT/Triple.h
+++ b/llvm/include/llvm/ADT/Triple.h
@@ -111,7 +111,6 @@ public:
     UnknownOS,
 
     AuroraUX,
-    Cygwin,
     Darwin,
     DragonFly,
     FreeBSD,
@@ -120,7 +119,6 @@ public:
     Linux,
     Lv2,        // PS3
     MacOSX,
-    MinGW32,    // i*86-pc-mingw32, *-w64-mingw32
     NetBSD,
     OpenBSD,
     Solaris,
@@ -378,13 +376,11 @@ public:
   }
 
   bool isWindowsCygwinEnvironment() const {
-    return getOS() == Triple::Cygwin ||
-           (getOS() == Triple::Win32 && getEnvironment() == Triple::Cygnus);
+    return getOS() == Triple::Win32 && getEnvironment() == Triple::Cygnus;
   }
 
   bool isWindowsGNUEnvironment() const {
-    return getOS() == Triple::MinGW32 ||
-           (getOS() == Triple::Win32 && getEnvironment() == Triple::GNU);
+    return getOS() == Triple::Win32 && getEnvironment() == Triple::GNU;
   }
 
   /// \brief Tests for either Cygwin or MinGW OS
diff --git a/llvm/lib/Support/Triple.cpp b/llvm/lib/Support/Triple.cpp
index 694f1ccd90d..2c0277319c7 100644
--- a/llvm/lib/Support/Triple.cpp
+++ b/llvm/lib/Support/Triple.cpp
@@ -126,7 +126,6 @@ const char *Triple::getOSTypeName(OSType Kind) {
   case UnknownOS: return "unknown";
 
   case AuroraUX: return "auroraux";
-  case Cygwin: return "cygwin";
   case Darwin: return "darwin";
   case DragonFly: return "dragonfly";
   case FreeBSD: return "freebsd";
@@ -135,7 +134,6 @@ const char *Triple::getOSTypeName(OSType Kind) {
   case Linux: return "linux";
   case Lv2: return "lv2";
   case MacOSX: return "macosx";
-  case MinGW32: return "mingw32";
   case NetBSD: return "netbsd";
   case OpenBSD: return "openbsd";
   case Solaris: return "solaris";
@@ -273,7 +271,6 @@ static Triple::VendorType parseVendor(StringRef VendorName) {
 static Triple::OSType parseOS(StringRef OSName) {
   return StringSwitch<Triple::OSType>(OSName)
     .StartsWith("auroraux", Triple::AuroraUX)
-    .StartsWith("cygwin", Triple::Cygwin)
     .StartsWith("darwin", Triple::Darwin)
     .StartsWith("dragonfly", Triple::DragonFly)
     .StartsWith("freebsd", Triple::FreeBSD)
@@ -282,7 +279,6 @@ static Triple::OSType parseOS(StringRef OSName) {
     .StartsWith("linux", Triple::Linux)
     .StartsWith("lv2", Triple::Lv2)
     .StartsWith("macosx", Triple::MacOSX)
-    .StartsWith("mingw32", Triple::MinGW32)
     .StartsWith("netbsd", Triple::NetBSD)
     .StartsWith("openbsd", Triple::OpenBSD)
     .StartsWith("solaris", Triple::Solaris)
@@ -416,6 +412,9 @@ Triple::Triple(const Twine &ArchStr, const Twine &VendorStr, const Twine &OSStr,
 }
 
 std::string Triple::normalize(StringRef Str) {
+  bool IsMinGW32 = false;
+  bool IsCygwin = false;
+
   // Parse into components.
   SmallVector<StringRef, 4> Components;
   Str.split(Components, "-");
@@ -432,8 +431,11 @@ std::string Triple::normalize(StringRef Str) {
   if (Components.size() > 1)
     Vendor = parseVendor(Components[1]);
   OSType OS = UnknownOS;
-  if (Components.size() > 2)
+  if (Components.size() > 2) {
     OS = parseOS(Components[2]);
+    IsCygwin = Components[2].startswith("cygwin");
+    IsMinGW32 = Components[2].startswith("mingw");
+  }
   EnvironmentType Environment = UnknownEnvironment;
   if (Components.size() > 3)
     Environment = parseEnvironment(Components[3]);
@@ -476,7 +478,9 @@ std::string Triple::normalize(StringRef Str) {
         break;
       case 2:
         OS = parseOS(Comp);
-        Valid = OS != UnknownOS;
+        IsCygwin = Comp.startswith("cygwin");
+        IsMinGW32 = Comp.startswith("mingw");
+        Valid = OS != UnknownOS || IsCygwin || IsMinGW32;
         break;
       case 3:
         Environment = parseEnvironment(Comp);
@@ -556,16 +560,16 @@ std::string Triple::normalize(StringRef Str) {
       else
         Components[3] = getObjectFormatTypeName(ObjectFormat);
     }
-  } else if (OS == Triple::MinGW32) {
+  } else if (IsMinGW32) {
     Components.resize(4);
     Components[2] = "windows";
     Components[3] = "gnu";
-  } else if (OS == Triple::Cygwin) {
+  } else if (IsCygwin) {
     Components.resize(4);
     Components[2] = "windows";
     Components[3] = "cygnus";
   }
-  if (OS == Triple::MinGW32 || OS == Triple::Cygwin ||
+  if (IsMinGW32 || IsCygwin ||
       (OS == Triple::Win32 && Environment != UnknownEnvironment)) {
     if (ObjectFormat != UnknownObjectFormat && ObjectFormat != Triple::COFF) {
       Components.resize(5);
diff --git a/llvm/unittests/ADT/TripleTest.cpp b/llvm/unittests/ADT/TripleTest.cpp
index dfc99837d4b..2a49afc27fa 100644
--- a/llvm/unittests/ADT/TripleTest.cpp
+++ b/llvm/unittests/ADT/TripleTest.cpp
@@ -190,7 +190,7 @@ TEST(TripleTest, Normalization) {
          ++Vendor) {
       C[1] = Triple::getVendorTypeName(Triple::VendorType(Vendor));
       for (int OS = 1+Triple::UnknownOS; OS <= Triple::Minix; ++OS) {
-        if (OS == Triple::Cygwin || OS == Triple::MinGW32 || OS == Triple::Win32)
+        if (OS == Triple::Win32)
           continue;
 
         C[2] = Triple::getOSTypeName(Triple::OSType(OS));
diff --git a/llvm/unittests/ExecutionEngine/MCJIT/MCJITCAPITest.cpp b/llvm/unittests/ExecutionEngine/MCJIT/MCJITCAPITest.cpp
index d03de898b4e..c80b88b8c2b 100644
--- a/llvm/unittests/ExecutionEngine/MCJIT/MCJITCAPITest.cpp
+++ b/llvm/unittests/ExecutionEngine/MCJIT/MCJITCAPITest.cpp
@@ -139,8 +139,6 @@ protected:
 
     // The operating systems below are known to be sufficiently incompatible
     // that they will fail the MCJIT C API tests.
-    UnsupportedOSs.push_back(Triple::Cygwin);
-
     UnsupportedEnvironments.push_back(Triple::Cygnus);
   }
   
diff --git a/llvm/unittests/ExecutionEngine/MCJIT/MCJITTestBase.h b/llvm/unittests/ExecutionEngine/MCJIT/MCJITTestBase.h
index 25de312e0e8..cc82b27e31d 100644
--- a/llvm/unittests/ExecutionEngine/MCJIT/MCJITTestBase.h
+++ b/llvm/unittests/ExecutionEngine/MCJIT/MCJITTestBase.h
@@ -302,7 +302,6 @@ protected:
     // The operating systems below are known to be incompatible with MCJIT as
     // they are copied from the test/ExecutionEngine/MCJIT/lit.local.cfg and
     // should be kept in sync.
-    UnsupportedOSs.push_back(Triple::Cygwin);
     UnsupportedOSs.push_back(Triple::Darwin);
 
     UnsupportedEnvironments.push_back(Triple::Cygnus);