DebugInfo: Migrate DISubprogram::describes() to new hierarchy, NFC

I don't really like this function at all -- I think it should be as
simple as `return getFunction() == F` -- but for now this seems like the
best we can do.

llvm-svn: 234778

1 files changed, 10 insertions, 0 deletions

diff --git a/llvm/lib/IR/DebugInfoMetadata.cpp b/llvm/lib/IR/DebugInfoMetadata.cpp
index 72126cc5fb2..ed6206264b0 100644
--- a/llvm/lib/IR/DebugInfoMetadata.cpp
+++ b/llvm/lib/IR/DebugInfoMetadata.cpp
@@ -348,6 +348,16 @@ Function *MDSubprogram::getFunction() const {
   return dyn_cast_or_null<Function>(getFunctionConstant());
 }
 
+bool MDSubprogram::describes(const Function *F) const {
+  assert(F && "Invalid function");
+  if (F == getFunction())
+    return true;
+  StringRef Name = getLinkageName();
+  if (Name.empty())
+    Name = getName();
+  return F->getName() == Name;
+}
+
 void MDSubprogram::replaceFunction(Function *F) {
   replaceFunction(F ? ConstantAsMetadata::get(F)
                     : static_cast<ConstantAsMetadata *>(nullptr));