Progress towards shepherding debug info through SelectionDAG.

No functional effect yet.  This is still evolving and should
not be viewed as final.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98195 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 15 insertions, 0 deletions

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 0cfcbb6..1416a6d 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -8521,6 +8521,21 @@ X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
     F->DeleteMachineInstr(MI);   // The pseudo instruction is gone now.
     return BB;
   }
+    // DBG_VALUE.  Only the frame index case is done here.
+  case X86::DBG_VALUE: {
+    const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
+    DebugLoc DL = MI->getDebugLoc();
+    X86AddressMode AM;
+    MachineFunction *F = BB->getParent();
+    AM.BaseType = X86AddressMode::FrameIndexBase;
+    AM.Base.FrameIndex = MI->getOperand(0).getImm();
+    addFullAddress(BuildMI(BB, DL, TII->get(X86::DBG_VALUE)), AM).
+      addImm(MI->getOperand(1).getImm()).
+      addMetadata(MI->getOperand(2).getMetadata());
+    F->DeleteMachineInstr(MI);      // Remove pseudo.
+    return BB;
+  }
+
     // String/text processing lowering.
   case X86::PCMPISTRM128REG:
     return EmitPCMP(MI, BB, 3, false /* in-mem */);