IR: Give 'DI' prefix to debug info metadata

Finish off PR23080 by renaming the debug info IR constructs from `MD*`
to `DI*`.  The last of the `DIDescriptor` classes were deleted in
r235356, and the last of the related typedefs removed in r235413, so
this has all baked for about a week.

Note: If you have out-of-tree code (like a frontend), I recommend that
you get everything compiling and tests passing with the *previous*
commit before updating to this one.  It'll be easier to keep track of
what code is using the `DIDescriptor` hierarchy and what you've already
updated, and I think you're extremely unlikely to insert bugs.  YMMV of
course.

Back to *this* commit: I did this using the rename-md-di-nodes.sh
upgrade script I've attached to PR23080 (both code and testcases) and
filtered through clang-format-diff.py.  I edited the tests for
test/Assembler/invalid-generic-debug-node-*.ll by hand since the columns
were off-by-three.  It should work on your out-of-tree testcases (and
code, if you've followed the advice in the previous paragraph).

Some of the tests are in badly named files now (e.g.,
test/Assembler/invalid-mdcompositetype-missing-tag.ll should be
'dicompositetype'); I'll come back and move the files in a follow-up
commit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236120 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 1 deletions

diff --git a/test/Bindings/OCaml/core.ml b/test/Bindings/OCaml/core.ml
index ce63a6d5ed9..3c759af791d 100644
--- a/test/Bindings/OCaml/core.ml
+++ b/test/Bindings/OCaml/core.ml
@@ -1445,7 +1445,7 @@ let test_builder () =
  * CHECK: !llvm.module.flags = !{!0}
  * CHECK: !0 = !{i32 1, !"Debug Info Version", i32 3}
  * CHECK: !1 = !{i32 1, !"metadata test"}
- * CHECK: !2 = !MDLocation(line: 2, column: 3, scope: !3, inlinedAt: !3)
+ * CHECK: !2 = !DILocation(line: 2, column: 3, scope: !3, inlinedAt: !3)
  *)
 
 (*===-- Pass Managers -----------------------------------------------------===*)