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/Inputs/gmlt.ll b/llvm/test/DebugInfo/Inputs/gmlt.ll
index d5002eca50e..e43264010bf 100644
--- a/llvm/test/DebugInfo/Inputs/gmlt.ll
+++ b/llvm/test/DebugInfo/Inputs/gmlt.ll
@@ -144,10 +144,10 @@ attributes #2 = { nounwind }
 !10 = !{i32 2, !"Dwarf Version", i32 4}
 !11 = !{i32 2, !"Debug Info Version", i32 2}
 !12 = !{!"clang version 3.6.0 "}
-!13 = !{i32 1, i32 12, !4, null}
-!14 = !{i32 2, i32 53, !7, null}
-!15 = !{i32 3, i32 44, !8, null}
-!16 = !{i32 3, i32 50, !8, null}
-!17 = !{i32 3, i32 44, !8, !18}
-!18 = !{i32 4, i32 13, !9, null}
-!19 = !{i32 4, i32 19, !9, null}
+!13 = !MDLocation(line: 1, column: 12, scope: !4)
+!14 = !MDLocation(line: 2, column: 53, scope: !7)
+!15 = !MDLocation(line: 3, column: 44, scope: !8)
+!16 = !MDLocation(line: 3, column: 50, scope: !8)
+!17 = !MDLocation(line: 3, column: 44, scope: !8, inlinedAt: !18)
+!18 = !MDLocation(line: 4, column: 13, scope: !9)
+!19 = !MDLocation(line: 4, column: 19, scope: !9)