Improve Mips back-end's handling of DBG_VALUE.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134224 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 24 insertions, 0 deletions

diff --git a/lib/Target/Mips/MipsAsmPrinter.cpp b/lib/Target/Mips/MipsAsmPrinter.cpp
index 6f69ba388f..78f69eaa25 100644
--- a/lib/Target/Mips/MipsAsmPrinter.cpp
+++ b/lib/Target/Mips/MipsAsmPrinter.cpp
@@ -38,6 +38,8 @@
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/Support/raw_ostream.h"
+#include "llvm/Analysis/DebugInfo.h"
+
 using namespace llvm;
 
 namespace {
@@ -75,6 +77,10 @@ namespace {
     void EmitInstruction(const MachineInstr *MI) {
       SmallString<128> Str;
       raw_svector_ostream OS(Str);
+
+      if (MI->isDebugValue())
+        PrintDebugValueComment(MI, OS);
+
       printInstruction(MI, OS);
       OutStreamer.EmitRawText(OS.str());
     }
@@ -86,6 +92,9 @@ namespace {
 
     virtual void EmitFunctionEntryLabel();
     void EmitStartOfAsmFile(Module &M);
+    virtual MachineLocation getDebugValueLocation(const MachineInstr *MI) const;
+
+    void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS);
   };
 } // end of anonymous namespace
 
@@ -441,6 +450,21 @@ void MipsAsmPrinter::EmitStartOfAsmFile(Module &M) {
   OutStreamer.EmitRawText(StringRef("\t.previous"));
 }
 
+MachineLocation
+MipsAsmPrinter::getDebugValueLocation(const MachineInstr *MI) const {
+  // Handles frame addresses emitted in MipsInstrInfo::emitFrameIndexDebugValue.
+  assert(MI->getNumOperands() == 4 && "Invalid no. of machine operands!");
+  assert(MI->getOperand(0).isReg() && MI->getOperand(1).isImm() &&
+         "Unexpected MachineOperand types");
+  return MachineLocation(MI->getOperand(0).getReg(),
+                         MI->getOperand(1).getImm());
+}
+
+void MipsAsmPrinter::PrintDebugValueComment(const MachineInstr *MI,
+                                           raw_ostream &OS) {
+  // TODO: implement
+}
+
 // Force static initialization.
 extern "C" void LLVMInitializeMipsAsmPrinter() {
   RegisterAsmPrinter<MipsAsmPrinter> X(TheMipsTarget);