[LLVM][Coroutines] Check variable decl scope instead of optimization level for hoisted DbgDeclare Loc (#92978)

Minor patch following up on
#75402.

The more generalized version of [this
error](#75104 (comment))
is whenever we have a debug variable created in one subprogram scope
inlined into another subprogram scope. So instead of checking
optimization level, it is safer to just check whether the subprogram
scope of the variable matches the subprogram scope of the hoisted
position.

Author: zyx-billy

llvm/lib/Transforms/Coroutines/CoroFrame.cpp

@@ -2974,10 +2974,12 @@ void coro::salvageDebugInfo(
     std::optional<BasicBlock::iterator> InsertPt;
     if (auto *I = dyn_cast<Instruction>(Storage)) {
       InsertPt = I->getInsertionPointAfterDef();
-      // Update DILocation only in O0 since it is easy to get out of sync in
-      // optimizations. See https://github.com/llvm/llvm-project/pull/75104 for
-      // an example.
-      if (!OptimizeFrame && I->getDebugLoc())
+      // Update DILocation only if variable was not inlined.
+      DebugLoc ILoc = I->getDebugLoc();
+      DebugLoc DVILoc = DVI.getDebugLoc();
+      if (ILoc && DVILoc &&
+          DVILoc->getScope()->getSubprogram() ==
+              ILoc->getScope()->getSubprogram())
         DVI.setDebugLoc(I->getDebugLoc());
     } else if (isa<Argument>(Storage))
       InsertPt = F->getEntryBlock().begin();
@@ -3014,11 +3016,13 @@ void coro::salvageDebugInfo(
     std::optional<BasicBlock::iterator> InsertPt;
     if (auto *I = dyn_cast<Instruction>(Storage)) {
       InsertPt = I->getInsertionPointAfterDef();
-      // Update DILocation only in O0 since it is easy to get out of sync in
-      // optimizations. See https://github.com/llvm/llvm-project/pull/75104 for
-      // an example.
-      if (!OptimizeFrame && I->getDebugLoc())
-        DVR.setDebugLoc(I->getDebugLoc());
+      // Update DILocation only if variable was not inlined.
+      DebugLoc ILoc = I->getDebugLoc();
+      DebugLoc DVRLoc = DVR.getDebugLoc();
+      if (ILoc && DVRLoc &&
+          DVRLoc->getScope()->getSubprogram() ==
+              ILoc->getScope()->getSubprogram())
+        DVR.setDebugLoc(ILoc);
     } else if (isa<Argument>(Storage))
       InsertPt = F->getEntryBlock().begin();
     if (InsertPt) {

llvm/test/Transforms/Coroutines/coro-debug-frame-variable-O1.ll renamed to llvm/test/Transforms/Coroutines/coro-debug-frame-variable-inlined.ll

@@ -1,5 +1,5 @@
-; RUN: opt < %s -passes='module(coro-early),cgscc(inline,coro-split<reuse-storage>)' -S | FileCheck %s
-; RUN: opt --try-experimental-debuginfo-iterators < %s -passes='module(coro-early),cgscc(inline,coro-split<reuse-storage>)' -S | FileCheck %s
+; RUN: opt < %s -passes='module(coro-early),cgscc(inline,coro-split)' -S | FileCheck %s
+; RUN: opt --try-experimental-debuginfo-iterators < %s -passes='module(coro-early),cgscc(inline,coro-split)' -S | FileCheck %s
 
 ; Simplified version from pr#75104.
 ; Make sure we do not update debug location for hosited dbg.declare intrinsics when optimizing coro frame.