Clean up some usage of Triple.  The base class has methods for determining if the target is iOS and Linux.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189604 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/TargetLibraryInfo.cpp b/lib/Target/TargetLibraryInfo.cpp
index 8696b57..972f7cb 100644
--- a/lib/Target/TargetLibraryInfo.cpp
+++ b/lib/Target/TargetLibraryInfo.cpp
@@ -350,7 +350,7 @@
   if (T.isMacOSX()) {
     if (T.isMacOSXVersionLT(10, 5))
       TLI.setUnavailable(LibFunc::memset_pattern16);
-  } else if (T.getOS() == Triple::IOS) {
+  } else if (T.isiOS()) {
     if (T.isOSVersionLT(3, 0))
       TLI.setUnavailable(LibFunc::memset_pattern16);
   } else {
@@ -562,7 +562,7 @@
   }
 
   // The following functions are available on at least Linux:
-  if (T.getOS() != Triple::Linux) {
+  if (!T.isOSLinux()) {
     TLI.setUnavailable(LibFunc::dunder_strdup);
     TLI.setUnavailable(LibFunc::dunder_strtok_r);
     TLI.setUnavailable(LibFunc::dunder_isoc99_scanf);