Revert "[codeview] support more DW_OPs for more complete debug info"

This reverts commit e160912f53f047bc97e572add179e08e33f4df48.

llvm-svn: 311977

1 files changed, 0 insertions, 51 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp b/llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp
index 4f647de..0971c59 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp
@@ -23,57 +23,6 @@
 
 using namespace llvm;
 
-bool DbgVariableLocation::extractFromMachineInstruction(
-    DbgVariableLocation &Location, const MachineInstr &Instruction) {
-  if (!Instruction.isDebugValue())
-    return false;
-  if (!Instruction.getOperand(0).isReg())
-    return false;
-  Location.Register = Instruction.getOperand(0).getReg();
-  Location.InMemory = Instruction.getOperand(1).isImm();
-  Location.Deref = false;
-  Location.FragmentInfo.reset();
-  // We only handle expressions generated by DIExpression::appendOffset,
-  // which doesn't require a full stack machine.
-  int64_t Offset = 0;
-  const DIExpression *DIExpr = Instruction.getDebugExpression();
-  auto Op = DIExpr->expr_op_begin();
-  while (Op != DIExpr->expr_op_end()) {
-    switch (Op->getOp()) {
-    case dwarf::DW_OP_constu: {
-      int Value = Op->getArg(0);
-      ++Op;
-      if (Op != DIExpr->expr_op_end()) {
-        switch (Op->getOp()) {
-        case dwarf::DW_OP_minus:
-          Offset -= Value;
-          break;
-        case dwarf::DW_OP_plus:
-          Offset += Value;
-        default:
-          continue;
-        }
-      }
-    } break;
-    case dwarf::DW_OP_plus_uconst:
-      Offset += Op->getArg(0);
-      break;
-    case dwarf::DW_OP_LLVM_fragment:
-      Location.FragmentInfo = {Op->getArg(1), Op->getArg(0)};
-      break;
-    case dwarf::DW_OP_deref:
-      Location.Deref = true;
-      break;
-    default:
-      return false;
-    }
-    ++Op;
-  }
-
-  Location.Offset = Offset;
-  return true;
-}
-
 DebugHandlerBase::DebugHandlerBase(AsmPrinter *A) : Asm(A), MMI(Asm->MMI) {}
 
 // Each LexicalScope has first instruction and last instruction to mark