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, 6 insertions, 6 deletions

diff --git a/llvm/test/DebugInfo/X86/dbg-value-const-byref.ll b/llvm/test/DebugInfo/X86/dbg-value-const-byref.ll
index 26979661a78..c8ffba87135 100644
--- a/llvm/test/DebugInfo/X86/dbg-value-const-byref.ll
+++ b/llvm/test/DebugInfo/X86/dbg-value-const-byref.ll
@@ -93,14 +93,14 @@ attributes #3 = { nounwind }
 !12 = !{i32 1, !"Debug Info Version", i32 2}
 !13 = !{!"clang version 3.5.0 "}
 !14 = !{i32 3}
-!15 = !{i32 6, i32 0, !4, null}
-!16 = !{i32 7, i32 0, !4, null}
+!15 = !MDLocation(line: 6, scope: !4)
+!16 = !MDLocation(line: 7, scope: !4)
 !17 = !{i32 7}
-!18 = !{i32 8, i32 0, !4, null}
-!19 = !{i32 9, i32 0, !4, null}
+!18 = !MDLocation(line: 8, scope: !4)
+!19 = !MDLocation(line: 9, scope: !4)
 !20 = !{!21, !21, i64 0}
 !21 = !{!"int", !22, i64 0}
 !22 = !{!"omnipotent char", !23, i64 0}
 !23 = !{!"Simple C/C++ TBAA"}
-!24 = !{i32 10, i32 0, !4, null}
-!25 = !{i32 11, i32 0, !4, null}
+!24 = !MDLocation(line: 10, scope: !4)
+!25 = !MDLocation(line: 11, scope: !4)