Revert new debug info format commits:

"[Flang] Update test to not check for tail calls on debug intrinsics" &
"Reapply#3 "[RemoveDIs] Load into new debug info format by default in LLVM (#89799)"

Recent updates to flang have added debug info generation via MLIR, a path
which currently does not support debug records. The patch that enables
debug records by default (and a small followup patch) are thus being
reverted until the MLIR path has been fixed.

This reverts commits:
  21396be865b4640abf6afa0b05de6708a1a996e0
  c5aeca732d1ff6769b0659efebd1cfb5f60487e4

4 files changed, 5 insertions, 9 deletions

diff --git a/llvm/lib/IR/BasicBlock.cpp b/llvm/lib/IR/BasicBlock.cpp
index aea9425..29f2cbf 100644
--- a/llvm/lib/IR/BasicBlock.cpp
+++ b/llvm/lib/IR/BasicBlock.cpp
@@ -181,7 +181,7 @@ template class llvm::SymbolTableListTraits<Instruction,
 BasicBlock::BasicBlock(LLVMContext &C, const Twine &Name, Function *NewParent,
                        BasicBlock *InsertBefore)
     : Value(Type::getLabelTy(C), Value::BasicBlockVal),
-      IsNewDbgInfoFormat(UseNewDbgInfoFormat), Parent(nullptr) {
+      IsNewDbgInfoFormat(false), Parent(nullptr) {
 
   if (NewParent)
     insertInto(NewParent, InsertBefore);
diff --git a/llvm/lib/IR/DebugProgramInstruction.cpp b/llvm/lib/IR/DebugProgramInstruction.cpp
index 9a4926c..fbca7cd 100644
--- a/llvm/lib/IR/DebugProgramInstruction.cpp
+++ b/llvm/lib/IR/DebugProgramInstruction.cpp
@@ -366,8 +366,8 @@ void DbgVariableRecord::setKillLocation() {
 }
 
 bool DbgVariableRecord::isKillLocation() const {
-  return (!hasArgList() && isa<MDNode>(getRawLocation())) ||
-         (getNumVariableLocationOps() == 0 && !getExpression()->isComplex()) ||
+  return (getNumVariableLocationOps() == 0 &&
+          !getExpression()->isComplex()) ||
          any_of(location_ops(), [](Value *V) { return isa<UndefValue>(V); });
 }
 
diff --git a/llvm/lib/IR/Function.cpp b/llvm/lib/IR/Function.cpp
index 9360e6d..3f73502 100644
--- a/llvm/lib/IR/Function.cpp
+++ b/llvm/lib/IR/Function.cpp
@@ -83,8 +83,6 @@ static cl::opt<int> NonGlobalValueMaxNameSize(
     "non-global-value-max-name-size", cl::Hidden, cl::init(1024),
     cl::desc("Maximum size for the name of non-global values."));
 
-extern cl::opt<bool> UseNewDbgInfoFormat;
-
 void Function::convertToNewDbgValues() {
   IsNewDbgInfoFormat = true;
   for (auto &BB : *this) {
@@ -443,7 +441,7 @@ Function::Function(FunctionType *Ty, LinkageTypes Linkage, unsigned AddrSpace,
     : GlobalObject(Ty, Value::FunctionVal,
                    OperandTraits<Function>::op_begin(this), 0, Linkage, name,
                    computeAddrSpace(AddrSpace, ParentModule)),
-      NumArgs(Ty->getNumParams()), IsNewDbgInfoFormat(UseNewDbgInfoFormat) {
+      NumArgs(Ty->getNumParams()), IsNewDbgInfoFormat(false) {
   assert(FunctionType::isValidReturnType(getReturnType()) &&
          "invalid return type");
   setGlobalObjectSubClassData(0);
diff --git a/llvm/lib/IR/Module.cpp b/llvm/lib/IR/Module.cpp
index 55c282c..f97dd18 100644
--- a/llvm/lib/IR/Module.cpp
+++ b/llvm/lib/IR/Module.cpp
@@ -54,8 +54,6 @@
 
 using namespace llvm;
 
-extern cl::opt<bool> UseNewDbgInfoFormat;
-
 //===----------------------------------------------------------------------===//
 // Methods to implement the globals and functions lists.
 //
@@ -74,7 +72,7 @@ template class llvm::SymbolTableListTraits<GlobalIFunc>;
 Module::Module(StringRef MID, LLVMContext &C)
     : Context(C), ValSymTab(std::make_unique<ValueSymbolTable>(-1)),
       ModuleID(std::string(MID)), SourceFileName(std::string(MID)), DL(""),
-      IsNewDbgInfoFormat(UseNewDbgInfoFormat) {
+      IsNewDbgInfoFormat(false) {
   Context.addModule(this);
 }