Remove the PTX back-end and all of its artifacts (triple, etc.)

This back-end was deprecated in favor of the NVPTX back-end.

NV_CONTRIB

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157417 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/ADT/TripleTest.cpp b/unittests/ADT/TripleTest.cpp
index 3b75584..967437c 100644
--- a/unittests/ADT/TripleTest.cpp
+++ b/unittests/ADT/TripleTest.cpp
@@ -353,9 +353,9 @@
   EXPECT_EQ(Triple::ppc, T.get32BitArchVariant().getArch());
   EXPECT_EQ(Triple::ppc64, T.get64BitArchVariant().getArch());
 
-  T.setArch(Triple::ptx32);
-  EXPECT_EQ(Triple::ptx32, T.get32BitArchVariant().getArch());
-  EXPECT_EQ(Triple::ptx64, T.get64BitArchVariant().getArch());
+  T.setArch(Triple::nvptx);
+  EXPECT_EQ(Triple::nvptx, T.get32BitArchVariant().getArch());
+  EXPECT_EQ(Triple::nvptx64, T.get64BitArchVariant().getArch());
 
   T.setArch(Triple::sparc);
   EXPECT_EQ(Triple::sparc, T.get32BitArchVariant().getArch());
@@ -377,9 +377,9 @@
   EXPECT_EQ(Triple::ppc, T.get32BitArchVariant().getArch());
   EXPECT_EQ(Triple::ppc64, T.get64BitArchVariant().getArch());
 
-  T.setArch(Triple::ptx64);
-  EXPECT_EQ(Triple::ptx32, T.get32BitArchVariant().getArch());
-  EXPECT_EQ(Triple::ptx64, T.get64BitArchVariant().getArch());
+  T.setArch(Triple::nvptx64);
+  EXPECT_EQ(Triple::nvptx, T.get32BitArchVariant().getArch());
+  EXPECT_EQ(Triple::nvptx64, T.get64BitArchVariant().getArch());
 
   T.setArch(Triple::sparcv9);
   EXPECT_EQ(Triple::sparc, T.get32BitArchVariant().getArch());