From: Anton Korobeynikov <asl@math.spbu.ru>
Date: Sun, 3 May 2009 13:14:46 +0000 (+0000)
Subject: Properly handle ExternalSymbol's
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5d59f68ade7573175f1ace09061a94286e59076b;p=oota-llvm.git

Properly handle ExternalSymbol's

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70752 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/MSP430/MSP430AsmPrinter.cpp b/lib/Target/MSP430/MSP430AsmPrinter.cpp
index 039ccce7981..0d5481b1c27 100644
--- a/lib/Target/MSP430/MSP430AsmPrinter.cpp
+++ b/lib/Target/MSP430/MSP430AsmPrinter.cpp
@@ -155,6 +155,15 @@ void MSP430AsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
 
     return;
   }
+  case MachineOperand::MO_ExternalSymbol: {
+    bool isCallOp = Modifier && !strcmp(Modifier, "call");
+    std::string Name(TAI->getGlobalPrefix());
+    Name += MO.getSymbolName();
+    if (isCallOp)
+      O << '#';
+    O << Name;
+    return;
+  }
   default:
     assert(0 && "Not implemented yet!");
   }
diff --git a/lib/Target/MSP430/MSP430ISelDAGToDAG.cpp b/lib/Target/MSP430/MSP430ISelDAGToDAG.cpp
index b8800f4b42f..67a9b0ebab3 100644
--- a/lib/Target/MSP430/MSP430ISelDAGToDAG.cpp
+++ b/lib/Target/MSP430/MSP430ISelDAGToDAG.cpp
@@ -107,6 +107,9 @@ bool MSP430DAGToDAGISel::SelectAddr(SDValue Op, SDValue Addr,
                                             MVT::i16, G->getOffset());
       Disp = CurDAG->getTargetConstant(0, MVT::i16);
       return true;
+    } else if (ExternalSymbolSDNode *E = dyn_cast<ExternalSymbolSDNode>(N0)) {
+      Base = CurDAG->getTargetExternalSymbol(E->getSymbol(), MVT::i16);
+      Disp = CurDAG->getTargetConstant(0, MVT::i16);
     }
     break;
   };
diff --git a/lib/Target/MSP430/MSP430ISelLowering.cpp b/lib/Target/MSP430/MSP430ISelLowering.cpp
index 64dffa9e93f..9777e772e4e 100644
--- a/lib/Target/MSP430/MSP430ISelLowering.cpp
+++ b/lib/Target/MSP430/MSP430ISelLowering.cpp
@@ -71,6 +71,7 @@ MSP430TargetLowering::MSP430TargetLowering(MSP430TargetMachine &tm) :
   setOperationAction(ISD::SHL,              MVT::i16,   Custom);
   setOperationAction(ISD::RET,              MVT::Other, Custom);
   setOperationAction(ISD::GlobalAddress,    MVT::i16,   Custom);
+  setOperationAction(ISD::ExternalSymbol,   MVT::i16,   Custom);
   setOperationAction(ISD::BR_CC,            MVT::Other, Expand);
   setOperationAction(ISD::BRCOND,           MVT::Other, Custom);
   setOperationAction(ISD::SETCC,            MVT::i8,    Custom);
@@ -95,6 +96,7 @@ SDValue MSP430TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) {
   case ISD::RET:              return LowerRET(Op, DAG);
   case ISD::CALL:             return LowerCALL(Op, DAG);
   case ISD::GlobalAddress:    return LowerGlobalAddress(Op, DAG);
+  case ISD::ExternalSymbol:   return LowerExternalSymbol(Op, DAG);
   case ISD::SETCC:            return LowerSETCC(Op, DAG);
   case ISD::BRCOND:           return LowerBRCOND(Op, DAG);
   case ISD::SELECT:           return LowerSELECT(Op, DAG);
@@ -459,6 +461,16 @@ SDValue MSP430TargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG)
                      getPointerTy(), Result);
 }
 
+SDValue MSP430TargetLowering::LowerExternalSymbol(SDValue Op,
+                                                  SelectionDAG &DAG) {
+  DebugLoc dl = Op.getDebugLoc();
+  const char *Sym = cast<ExternalSymbolSDNode>(Op)->getSymbol();
+  SDValue Result = DAG.getTargetExternalSymbol(Sym, getPointerTy());
+
+  return DAG.getNode(MSP430ISD::Wrapper, dl, getPointerTy(), Result);;
+}
+
+
 MVT MSP430TargetLowering::getSetCCResultType(MVT VT) const {
   return MVT::i8;
 }
diff --git a/lib/Target/MSP430/MSP430ISelLowering.h b/lib/Target/MSP430/MSP430ISelLowering.h
index d6739cb78b8..064cb67c247 100644
--- a/lib/Target/MSP430/MSP430ISelLowering.h
+++ b/lib/Target/MSP430/MSP430ISelLowering.h
@@ -79,6 +79,7 @@ namespace llvm {
     SDValue LowerCCCArguments(SDValue Op, SelectionDAG &DAG);
     SDValue LowerShifts(SDValue Op, SelectionDAG &DAG);
     SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG);
+    SDValue LowerExternalSymbol(SDValue Op, SelectionDAG &DAG);
     SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG);
     SDValue LowerBRCOND(SDValue Op, SelectionDAG &DAG);
     SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG);
diff --git a/lib/Target/MSP430/MSP430InstrInfo.td b/lib/Target/MSP430/MSP430InstrInfo.td
index 74c37d9f21c..63576b0b212 100644
--- a/lib/Target/MSP430/MSP430InstrInfo.td
+++ b/lib/Target/MSP430/MSP430InstrInfo.td
@@ -718,15 +718,25 @@ def : Pat<(extloadi16i8 addr:$src), (MOVZX16rm8 addr:$src)>;
 def : Pat<(i8 (trunc GR16:$src)),
           (EXTRACT_SUBREG GR16:$src, subreg_8bit)>;
 
-// GlobalAddress
+// GlobalAddress, ExternalSymbol
 def : Pat<(i16 (MSP430Wrapper tglobaladdr:$dst)), (MOV16ri tglobaladdr:$dst)>;
+def : Pat<(i16 (MSP430Wrapper texternalsym:$dst)), (MOV16ri texternalsym:$dst)>;
 
 def : Pat<(add GR16:$src1, (MSP430Wrapper tglobaladdr :$src2)),
           (ADD16ri GR16:$src1, tglobaladdr:$src2)>;
+def : Pat<(add GR16:$src1, (MSP430Wrapper texternalsym:$src2)),
+          (ADD16ri GR16:$src1, texternalsym:$src2)>;
+
+def : Pat<(store (i16 (MSP430Wrapper tglobaladdr:$src)), addr:$dst),
+          (MOV16mi addr:$dst, tglobaladdr:$src)>;
+def : Pat<(store (i16 (MSP430Wrapper texternalsym:$src)), addr:$dst),
+          (MOV16mi addr:$dst, texternalsym:$src)>;
 
 // calls
 def : Pat<(MSP430call (i16 tglobaladdr:$dst)),
           (CALLi tglobaladdr:$dst)>;
+def : Pat<(MSP430call (i16 texternalsym:$dst)),
+          (CALLi texternalsym:$dst)>;
 
 // add and sub always produce carry
 def : Pat<(addc GR16:$src1, GR16:$src2),