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, 8 insertions, 8 deletions

diff --git a/llvm/test/DebugInfo/X86/DW_AT_location-reference.ll b/llvm/test/DebugInfo/X86/DW_AT_location-reference.ll
index 52f48dbd2c2..a5b5700ca70 100644
--- a/llvm/test/DebugInfo/X86/DW_AT_location-reference.ll
+++ b/llvm/test/DebugInfo/X86/DW_AT_location-reference.ll
@@ -110,16 +110,16 @@ declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnon
 !5 = !{!"0x100\00x\005\000", !6, !1, !7} ; [ DW_TAG_auto_variable ]
 !6 = !{!"0xb\004\0014\000", !23, !0} ; [ DW_TAG_lexical_block ]
 !7 = !{!"0x24\00int\000\0032\0032\000\000\005", null, !2} ; [ DW_TAG_base_type ]
-!8 = !{i32 6, i32 3, !6, null}
+!8 = !MDLocation(line: 6, column: 3, scope: !6)
 !12 = !{i32 1}
-!13 = !{i32 7, i32 3, !6, null}
-!14 = !{i32 8, i32 3, !6, null}
-!15 = !{i32 9, i32 3, !6, null}
+!13 = !MDLocation(line: 7, column: 3, scope: !6)
+!14 = !MDLocation(line: 8, column: 3, scope: !6)
+!15 = !MDLocation(line: 9, column: 3, scope: !6)
 !16 = !{i32 2}
-!17 = !{i32 10, i32 3, !6, null}
-!18 = !{i32 11, i32 3, !6, null}
-!19 = !{i32 12, i32 3, !6, null}
-!20 = !{i32 13, i32 1, !6, null}
+!17 = !MDLocation(line: 10, column: 3, scope: !6)
+!18 = !MDLocation(line: 11, column: 3, scope: !6)
+!19 = !MDLocation(line: 12, column: 3, scope: !6)
+!20 = !MDLocation(line: 13, column: 1, scope: !6)
 !21 = !{!0}
 !22 = !{!5}
 !23 = !{!"simple.c", !"/home/rengol01/temp/tests/dwarf/relocation"}