Fix more fallout from the introduction of "macosx" and "ios" triples.

The Darwin toolchain constructor was assuming that all Darwin triples would
have an OS string starting with "darwin".  Triples starting with "macosx"
would misinterpret the version number, and "ios" triples would completely
miss the version number (or worse) because the OS name is not 6 characters
long.  We lose some sanity checking of triple strings here, since the
Triple.getOSVersion function doesn't do all the checking that the previous
code did, but this still seems like a step in the right direction.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149422 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 37 insertions, 10 deletions

diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index b4273f8c2e..9cc29cd545 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -50,17 +50,44 @@ Darwin::Darwin(const Driver &D, const llvm::Triple& Triple)
     ARCRuntimeForSimulator(ARCSimulator_None),
     LibCXXForSimulator(LibCXXSimulator_None)
 {
-  // Compute the initial Darwin version based on the host.
-  bool HadExtra;
-  std::string OSName = Triple.getOSName();
-  if (!Driver::GetReleaseVersion(&OSName.c_str()[6],
-                                 DarwinVersion[0], DarwinVersion[1],
-                                 DarwinVersion[2], HadExtra))
-    getDriver().Diag(diag::err_drv_invalid_darwin_version) << OSName;
-
+  // Compute the initial Darwin version from the triple
+  unsigned Major, Minor, Micro;
+  Triple.getOSVersion(Major, Minor, Micro);
+  switch (Triple.getOS()) {
+  default: assert(0 && "unexpected OS for Darwin triple");
+  case llvm::Triple::Darwin:
+    // Default to darwin4, i.e., MacOSX 10.0.0.
+    if (Major == 0)
+      Major = 4;
+    if (Major < 4)
+      getDriver().Diag(diag::err_drv_invalid_darwin_version) <<
+        Triple.getOSName();
+    Micro = 0;
+    Minor = Major - 4;
+    Major = 10;
+    break;
+  case llvm::Triple::MacOSX:
+    // Default to MacOSX 10.
+    if (Major == 0)
+      Major = 10;
+    if (Major != 10)
+      getDriver().Diag(diag::err_drv_invalid_darwin_version) <<
+        Triple.getOSName();
+    break;
+  case llvm::Triple::IOS:
+    // Ignore the version from the triple.
+    Major = 10;
+    Minor = 0;
+    Micro = 0;
+    break;
+  }
+  // FIXME: DarwinVersion is only used to find GCC's libexec directory.
+  // It should be removed when we stop supporting that.
+  DarwinVersion[0] = Minor + 4;
+  DarwinVersion[1] = Micro;
+  DarwinVersion[2] = 0;
   llvm::raw_string_ostream(MacosxVersionMin)
-    << "10." << std::max(0, (int)DarwinVersion[0] - 4) << '.'
-    << DarwinVersion[1];
+    << Major << '.' << Minor << '.' << Micro;
 }
 
 types::ID Darwin::LookupTypeForExtension(const char *Ext) const {