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.

llvm-svn: 236120

1 files changed, 4 insertions, 4 deletions

diff --git a/llvm/tools/opt/BreakpointPrinter.cpp b/llvm/tools/opt/BreakpointPrinter.cpp
index 26c1b551127..363a7cd8007 100644
--- a/llvm/tools/opt/BreakpointPrinter.cpp
+++ b/llvm/tools/opt/BreakpointPrinter.cpp
@@ -29,13 +29,13 @@ struct BreakpointPrinter : public ModulePass {
 
   BreakpointPrinter(raw_ostream &out) : ModulePass(ID), Out(out) {}
 
-  void getContextName(const MDScope *Context, std::string &N) {
-    if (auto *NS = dyn_cast<MDNamespace>(Context)) {
+  void getContextName(const DIScope *Context, std::string &N) {
+    if (auto *NS = dyn_cast<DINamespace>(Context)) {
       if (!NS->getName().empty()) {
         getContextName(NS->getScope(), N);
         N = N + NS->getName().str() + "::";
       }
-    } else if (auto *TY = dyn_cast<MDType>(Context)) {
+    } else if (auto *TY = dyn_cast<DIType>(Context)) {
       if (!TY->getName().empty()) {
         getContextName(TY->getScope().resolve(TypeIdentifierMap), N);
         N = N + TY->getName().str() + "::";
@@ -53,7 +53,7 @@ struct BreakpointPrinter : public ModulePass {
     if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.sp"))
       for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
         std::string Name;
-        auto *SP = cast_or_null<MDSubprogram>(NMD->getOperand(i));
+        auto *SP = cast_or_null<DISubprogram>(NMD->getOperand(i));
         if (!SP)
           continue;
         getContextName(SP->getScope().resolve(TypeIdentifierMap), Name);