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, 3 insertions, 3 deletions

diff --git a/llvm/test/Transforms/Scalarizer/dbginfo.ll b/llvm/test/Transforms/Scalarizer/dbginfo.ll
index 4dab7dcab1c..ed65aaace2c 100644
--- a/llvm/test/Transforms/Scalarizer/dbginfo.ll
+++ b/llvm/test/Transforms/Scalarizer/dbginfo.ll
@@ -77,10 +77,10 @@ attributes #1 = { nounwind readnone }
 !17 = !{!"0x101\00c\0050331651\000", !4, !5, !8} ; [ DW_TAG_arg_variable ] [c] [line 3]
 !18 = !{i32 2, !"Dwarf Version", i32 4}
 !19 = !{!"clang version 3.4 (trunk 194134) (llvm/trunk 194126)"}
-!20 = !{i32 3, i32 0, !4, null}
-!21 = !{i32 5, i32 0, !4, null}
+!20 = !MDLocation(line: 3, scope: !4)
+!21 = !MDLocation(line: 5, scope: !4)
 !22 = !{!23, !23, i64 0}
 !23 = !{!"omnipotent char", !24, i64 0}
 !24 = !{!"Simple C/C++ TBAA"}
-!25 = !{i32 6, i32 0, !4, null}
+!25 = !MDLocation(line: 6, scope: !4)
 !26 = !{i32 1, !"Debug Info Version", i32 2}