Add ARM specific emitFrameIndexDebugValue.

llvm-svn: 102324

3 files changed, 23 insertions, 0 deletions

diff --git a/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp b/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
index 7c49374f2e2..cce9a8b67fc 100644
--- a/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
+++ b/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
@@ -816,6 +816,16 @@ loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
   }
 }
 
+MachineInstr*
+ARMBaseInstrInfo::emitFrameIndexDebugValue(MachineFunction &MF,
+                                           unsigned FrameIx, uint64_t Offset,
+                                           const MDNode *MDPtr,
+                                           DebugLoc DL) const {
+  MachineInstrBuilder MIB = BuildMI(MF, DL, get(ARM::DBG_VALUE))
+    .addFrameIndex(FrameIx).addImm(0).addImm(Offset).addMetadata(MDPtr);
+  return &*MIB;
+}
+
 MachineInstr *ARMBaseInstrInfo::
 foldMemoryOperandImpl(MachineFunction &MF, MachineInstr *MI,
                       const SmallVectorImpl<unsigned> &Ops, int FI) const {
diff --git a/llvm/lib/Target/ARM/ARMBaseInstrInfo.h b/llvm/lib/Target/ARM/ARMBaseInstrInfo.h
index 292c4984dd6..fb0b3afff9c 100644
--- a/llvm/lib/Target/ARM/ARMBaseInstrInfo.h
+++ b/llvm/lib/Target/ARM/ARMBaseInstrInfo.h
@@ -269,6 +269,12 @@ public:
                                     unsigned DestReg, int FrameIndex,
                                     const TargetRegisterClass *RC) const;
 
+  virtual MachineInstr *emitFrameIndexDebugValue(MachineFunction &MF,
+                                                 unsigned FrameIx,
+                                                 uint64_t Offset,
+                                                 const MDNode *MDPtr,
+                                                 DebugLoc DL) const;
+
   virtual bool canFoldMemoryOperand(const MachineInstr *MI,
                                     const SmallVectorImpl<unsigned> &Ops) const;
 
diff --git a/llvm/lib/Target/ARM/ARMBaseRegisterInfo.cpp b/llvm/lib/Target/ARM/ARMBaseRegisterInfo.cpp
index 2a4e1a853ab..bc121874368 100644
--- a/llvm/lib/Target/ARM/ARMBaseRegisterInfo.cpp
+++ b/llvm/lib/Target/ARM/ARMBaseRegisterInfo.cpp
@@ -1183,6 +1183,13 @@ ARMBaseRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
     SPAdj = 0;
   Offset += SPAdj;
 
+  // Special handling of dbg_value instructions.
+  if (MI.isDebugValue()) {
+    MI.getOperand(i).  ChangeToRegister(FrameReg, false /*isDef*/);
+    MI.getOperand(i+1).ChangeToImmediate(Offset);
+    return 0;
+  }
+
   // Modify MI as necessary to handle as much of 'Offset' as possible
   bool Done = false;
   if (!AFI->isThumbFunction())