IR: Move MDLocation into place

This commit moves `MDLocation`, finishing off PR21433.  There's an
accompanying clang commit for frontend testcases.  I'll attach the
testcase upgrade script I used to PR21433 to help out-of-tree
frontends/backends.

This changes the schema for `DebugLoc` and `DILocation` from:

    !{i32 3, i32 7, !7, !8}

to:

    !MDLocation(line: 3, column: 7, scope: !7, inlinedAt: !8)

Note that empty fields (line/column: 0 and inlinedAt: null) don't get
printed by the assembly writer.

llvm-svn: 226048

1 files changed, 7 insertions, 7 deletions

diff --git a/llvm/test/DebugInfo/X86/array.ll b/llvm/test/DebugInfo/X86/array.ll
index f71b0a1264f..e39be5ae0ff 100644
--- a/llvm/test/DebugInfo/X86/array.ll
+++ b/llvm/test/DebugInfo/X86/array.ll
@@ -88,14 +88,14 @@ attributes #2 = { nounwind readnone }
 !25 = !{i32 2, !"Dwarf Version", i32 2}
 !26 = !{i32 1, !"Debug Info Version", i32 2}
 !27 = !{!"clang version 3.5.0 "}
-!28 = !{i32 1, i32 0, !4, null}
-!29 = !{i32 2, i32 0, !4, null}
+!28 = !MDLocation(line: 1, scope: !4)
+!29 = !MDLocation(line: 2, scope: !4)
 !30 = !{!31, !31, i64 0}
 !31 = !{!"int", !32, i64 0}
 !32 = !{!"omnipotent char", !33, i64 0}
 !33 = !{!"Simple C/C++ TBAA"}
-!34 = !{i32 3, i32 0, !4, null}
-!35 = !{i32 5, i32 0, !12, null}
-!36 = !{i32 6, i32 0, !12, null}
-!37 = !{i32 7, i32 0, !12, null}
-!38 = !{i32 8, i32 0, !12, null}
+!34 = !MDLocation(line: 3, scope: !4)
+!35 = !MDLocation(line: 5, scope: !12)
+!36 = !MDLocation(line: 6, scope: !12)
+!37 = !MDLocation(line: 7, scope: !12)
+!38 = !MDLocation(line: 8, scope: !12)