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, 21 insertions, 21 deletions

diff --git a/llvm/test/Transforms/LoopVectorize/control-flow.ll b/llvm/test/Transforms/LoopVectorize/control-flow.ll
index 452b7ae823f..bbff5ee1587 100644
--- a/llvm/test/Transforms/LoopVectorize/control-flow.ll
+++ b/llvm/test/Transforms/LoopVectorize/control-flow.ll
@@ -55,24 +55,24 @@ attributes #0 = { nounwind }
 !llvm.module.flags = !{!7, !8}
 !llvm.ident = !{!9}
 
-!0 = metadata !{metadata !"0x11\004\00clang version 3.5.0\001\00\006\00\002", metadata !1, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2} ; [ DW_TAG_compile_unit ] [./source.cpp] [DW_LANG_C_plus_plus]
-!1 = metadata !{metadata !"source.cpp", metadata !"."}
-!2 = metadata !{}
-!3 = metadata !{metadata !4}
-!4 = metadata !{metadata !"0x2e\00test\00test\00\001\000\001\000\006\00256\001\002", metadata !1, metadata !5, metadata !6, null, i32 (i32*, i32)* @_Z4testPii, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 1] [def] [scope 2] [test]
-!5 = metadata !{metadata !"0x29", metadata !1}          ; [ DW_TAG_file_type ] [./source.cpp]
-!6 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !2, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
-!7 = metadata !{i32 2, metadata !"Dwarf Version", i32 2}
-!8 = metadata !{i32 2, metadata !"Debug Info Version", i32 2}
-!9 = metadata !{metadata !"clang version 3.5.0"}
-!10 = metadata !{i32 3, i32 8, metadata !11, null}
-!11 = metadata !{metadata !"0xb\003\003\000", metadata !1, metadata !4} ; [ DW_TAG_lexical_block ]
-!12 = metadata !{i32 5, i32 9, metadata !13, null}
-!13 = metadata !{metadata !"0xb\005\009\000", metadata !1, metadata !14} ; [ DW_TAG_lexical_block ]
-!14 = metadata !{metadata !"0xb\004\003\000", metadata !1, metadata !11} ; [ DW_TAG_lexical_block ]
-!15 = metadata !{metadata !16, metadata !16, i64 0}
-!16 = metadata !{metadata !"int", metadata !17, i64 0}
-!17 = metadata !{metadata !"omnipotent char", metadata !18, i64 0}
-!18 = metadata !{metadata !"Simple C/C++ TBAA"}
-!19 = metadata !{i32 8, i32 7, metadata !13, null}
-!20 = metadata !{i32 12, i32 3, metadata !4, null}
+!0 = !{!"0x11\004\00clang version 3.5.0\001\00\006\00\002", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [./source.cpp] [DW_LANG_C_plus_plus]
+!1 = !{!"source.cpp", !"."}
+!2 = !{}
+!3 = !{!4}
+!4 = !{!"0x2e\00test\00test\00\001\000\001\000\006\00256\001\002", !1, !5, !6, null, i32 (i32*, i32)* @_Z4testPii, null, null, !2} ; [ DW_TAG_subprogram ] [line 1] [def] [scope 2] [test]
+!5 = !{!"0x29", !1}          ; [ DW_TAG_file_type ] [./source.cpp]
+!6 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !2, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = !{i32 2, !"Dwarf Version", i32 2}
+!8 = !{i32 2, !"Debug Info Version", i32 2}
+!9 = !{!"clang version 3.5.0"}
+!10 = !{i32 3, i32 8, !11, null}
+!11 = !{!"0xb\003\003\000", !1, !4} ; [ DW_TAG_lexical_block ]
+!12 = !{i32 5, i32 9, !13, null}
+!13 = !{!"0xb\005\009\000", !1, !14} ; [ DW_TAG_lexical_block ]
+!14 = !{!"0xb\004\003\000", !1, !11} ; [ DW_TAG_lexical_block ]
+!15 = !{!16, !16, i64 0}
+!16 = !{!"int", !17, i64 0}
+!17 = !{!"omnipotent char", !18, i64 0}
+!18 = !{!"Simple C/C++ TBAA"}
+!19 = !{i32 8, i32 7, !13, null}
+!20 = !{i32 12, i32 3, !4, null}