SelectionDAG: Stop using DIVariable::isInlinedFnArgument()

Instead of calling the somewhat confusingly-named
`DIVariable::isInlinedFnArgument()`, do the check directly here.
There's possibly a small functionality change here: instead of
`dyn_cast<>`'ing `DV->getScope()` to `MDSubprogram`, I'm looking up the
scope chain for the actual subprogram.  I suspect that this is a no-op
for function arguments so in practise there isn't a real difference.

I've also added a `FIXME` to check the `inlinedAt:` chain instead, since
I wonder if that would be more reliable than the
`MDSubprogram::describes()` function.

Since this was the only user of `DIVariable::isInlinedFnArgument()`,
delete it.

llvm-svn: 234799

1 files changed, 0 insertions, 10 deletions

diff --git a/llvm/lib/IR/DebugInfo.cpp b/llvm/lib/IR/DebugInfo.cpp
index 20467c93adb..fc302010b6e 100644
--- a/llvm/lib/IR/DebugInfo.cpp
+++ b/llvm/lib/IR/DebugInfo.cpp
@@ -39,16 +39,6 @@ using namespace llvm::dwarf;
 
 DIScopeRef DIScope::getRef() const { return MDScopeRef::get(get()); }
 
-bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
-  assert(CurFn && "Invalid function");
-  DISubprogram SP = dyn_cast<MDSubprogram>(getContext());
-  if (!SP)
-    return false;
-  // This variable is not inlined function argument if its scope
-  // does not describe current function.
-  return !SP.describes(CurFn);
-}
-
 void DICompileUnit::replaceSubprograms(DIArray Subprograms) {
   get()->replaceSubprograms(MDSubprogramArray(Subprograms));
 }