GlobalISel: translate @llvm.va_end intrinsic.

Turns out no-one actually cares about this one (at least) in tree so we can
just drop it entirely.

llvm-svn: 294345
diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
index a1a1d7b..eee78ea 100644
--- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -579,6 +579,10 @@
       MIRBuilder.buildDirectDbgValue(Reg, DI.getVariable(), DI.getExpression());
     return true;
   }
+  case Intrinsic::vaend:
+    // No target I know of cares about va_end. Certainly no in-tree target
+    // does. Simplest intrinsic ever!
+    return true;
   case Intrinsic::dbg_value: {
     // This form of DBG_VALUE is target-independent.
     const DbgValueInst &DI = cast<DbgValueInst>(CI);