Add support for metadata representing .ident directives.

llvm-svn: 192764
diff --git a/llvm/test/Verifier/ident-meta3.ll b/llvm/test/Verifier/ident-meta3.ll
new file mode 100644
index 0000000..a847b46
--- /dev/null
+++ b/llvm/test/Verifier/ident-meta3.ll
@@ -0,0 +1,10 @@
+; RUN: not llvm-as < %s -o /dev/null 2>&1 | FileCheck %s
+; Verify that llvm.ident is properly structured.
+; llvm.ident takes a list of metadata entries.
+; Each metadata entry can contain one string only.
+
+!llvm.ident = !{!0}
+!0 = metadata !{metadata !{metadata !"nested metadata"}}
+; CHECK: assembly parsed, but does not verify as correct!
+; CHECK-NEXT: invalid value for llvm.ident metadata entry operand(the operand should be a string)
+; CHECK-NEXT: metadata !1