[PowerPC] Rename some more VK_PPC_ enums

This renames more VK_PPC_ enums, to make them more closely reflect
the @modifier string they represent.  This also prepares for adding
a bunch of new VK_PPC_ enums in upcoming patches.

For consistency, some MO_ flags related to VK_PPC_ enums are
likewise renamed.

No change in behaviour.

llvm-svn: 184547
diff --git a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.cpp b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.cpp
index 3b794fe..b29d6ff 100644
--- a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.cpp
+++ b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.cpp
@@ -26,8 +26,8 @@
   if (isDarwinSyntax()) {
     switch (Kind) {
     default: llvm_unreachable("Invalid kind!");
-    case VK_PPC_HA16: OS << "ha16"; break;
-    case VK_PPC_LO16: OS << "lo16"; break;
+    case VK_PPC_LO: OS << "lo16"; break;
+    case VK_PPC_HA: OS << "ha16"; break;
     }
 
     OS << '(';
@@ -38,8 +38,8 @@
 
     switch (Kind) {
     default: llvm_unreachable("Invalid kind!");
-    case VK_PPC_HA16: OS << "@ha"; break;
-    case VK_PPC_LO16: OS << "@l"; break;
+    case VK_PPC_LO: OS << "@l"; break;
+    case VK_PPC_HA: OS << "@ha"; break;
     }
   }
 }
@@ -57,12 +57,12 @@
     switch (Kind) {
       default:
         llvm_unreachable("Invalid kind!");
-      case VK_PPC_HA16:
-        Result = ((Result >> 16) + ((Result & 0x8000) ? 1 : 0)) & 0xffff;
-        break;
-      case VK_PPC_LO16:
+      case VK_PPC_LO:
         Result = Result & 0xffff;
         break;
+      case VK_PPC_HA:
+        Result = ((Result >> 16) + ((Result & 0x8000) ? 1 : 0)) & 0xffff;
+        break;
     }
     Res = MCValue::get(Result);
   } else {
@@ -74,11 +74,11 @@
     switch (Kind) {
       default:
         llvm_unreachable("Invalid kind!");
-      case VK_PPC_HA16:
-        Modifier = MCSymbolRefExpr::VK_PPC_ADDR16_HA;
+      case VK_PPC_LO:
+        Modifier = MCSymbolRefExpr::VK_PPC_LO;
         break;
-      case VK_PPC_LO16:
-        Modifier = MCSymbolRefExpr::VK_PPC_ADDR16_LO;
+      case VK_PPC_HA:
+        Modifier = MCSymbolRefExpr::VK_PPC_HA;
         break;
     }
     Sym = MCSymbolRefExpr::Create(&Sym->getSymbol(), Modifier, Context);