IR: Make metadata typeless in assembly

Now that `Metadata` is typeless, reflect that in the assembly.  These
are the matching assembly changes for the metadata/value split in
r223802.

  - Only use the `metadata` type when referencing metadata from a call
    intrinsic -- i.e., only when it's used as a `Value`.

  - Stop pretending that `ValueAsMetadata` is wrapped in an `MDNode`
    when referencing it from call intrinsics.

So, assembly like this:

    define @foo(i32 %v) {
      call void @llvm.foo(metadata !{i32 %v}, metadata !0)
      call void @llvm.foo(metadata !{i32 7}, metadata !0)
      call void @llvm.foo(metadata !1, metadata !0)
      call void @llvm.foo(metadata !3, metadata !0)
      call void @llvm.foo(metadata !{metadata !3}, metadata !0)
      ret void, !bar !2
    }
    !0 = metadata !{metadata !2}
    !1 = metadata !{i32* @global}
    !2 = metadata !{metadata !3}
    !3 = metadata !{}

turns into this:

    define @foo(i32 %v) {
      call void @llvm.foo(metadata i32 %v, metadata !0)
      call void @llvm.foo(metadata i32 7, metadata !0)
      call void @llvm.foo(metadata i32* @global, metadata !0)
      call void @llvm.foo(metadata !3, metadata !0)
      call void @llvm.foo(metadata !{!3}, metadata !0)
      ret void, !bar !2
    }
    !0 = !{!2}
    !1 = !{i32* @global}
    !2 = !{!3}
    !3 = !{}

I wrote an upgrade script that handled almost all of the tests in llvm
and many of the tests in cfe (even handling many `CHECK` lines).  I've
attached it (or will attach it in a moment if you're speedy) to PR21532
to help everyone update their out-of-tree testcases.

This is part of PR21532.

llvm-svn: 224257

1 files changed, 3 insertions, 3 deletions

diff --git a/llvm/test/Transforms/SimplifyCFG/hoist-with-range.ll b/llvm/test/Transforms/SimplifyCFG/hoist-with-range.ll
index 362aa9a42d1..7ca3ff247dc 100644
--- a/llvm/test/Transforms/SimplifyCFG/hoist-with-range.ll
+++ b/llvm/test/Transforms/SimplifyCFG/hoist-with-range.ll
@@ -3,7 +3,7 @@
 define void @foo(i1 %c, i8* %p) {
 ; CHECK: if:
 ; CHECK-NEXT: load i8* %p, !range !0
-; CHECK: !0 = metadata !{i8 0, i8 1, i8 3, i8 5}
+; CHECK: !0 = !{i8 0, i8 1, i8 3, i8 5}
 if:
   br i1 %c, label %then, label %else
 then:
@@ -16,5 +16,5 @@ out:
   ret void
 }
 
-!0 = metadata !{ i8 0, i8 1 }
-!1 = metadata !{ i8 3, i8 5 }
+!0 = !{ i8 0, i8 1 }
+!1 = !{ i8 3, i8 5 }