Re-commit r151623 with fix. Only issue special no-return calls if it's a direct call.

[oota-llvm.git] / lib / Target / XCore / XCoreISelLowering.cpp

diff --git a/lib/Target/XCore/XCoreISelLowering.cpp b/lib/Target/XCore/XCoreISelLowering.cpp
index 4b74f960474ab75076bbfa5c1fb3deee4b571d99..c2d2a5d5938a52a65c461b928180c7a14e52e9d2 100644 (file)
--- a/lib/Target/XCore/XCoreISelLowering.cpp
+++ b/lib/Target/XCore/XCoreISelLowering.cpp
@@ -1,4 +1,4 @@
-//===-- XCoreISelLowering.cpp - XCore DAG Lowering Implementation   ------===//
+//===-- XCoreISelLowering.cpp - XCore DAG Lowering Implementation ---------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -36,7 +36,6 @@
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"
-#include "llvm/ADT/VectorExtras.h"
 using namespace llvm;
 
 const char *XCoreTargetLowering::
@@ -109,6 +108,8 @@ XCoreTargetLowering::XCoreTargetLowering(XCoreTargetMachine &XTM)
   setOperationAction(ISD::CTPOP, MVT::i32, Expand);
   setOperationAction(ISD::ROTL , MVT::i32, Expand);
   setOperationAction(ISD::ROTR , MVT::i32, Expand);
+  setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32, Expand);
+  setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32, Expand);
 
   setOperationAction(ISD::TRAP, MVT::Other, Legal);
 
@@ -186,7 +187,6 @@ LowerOperation(SDValue Op, SelectionDAG &DAG) const {
   case ISD::ADJUST_TRAMPOLINE: return LowerADJUST_TRAMPOLINE(Op, DAG);
   default:
     llvm_unreachable("unimplemented operand");
-    return SDValue();
   }
 }
 
@@ -198,7 +198,6 @@ void XCoreTargetLowering::ReplaceNodeResults(SDNode *N,
   switch (N->getOpcode()) {
   default:
     llvm_unreachable("Don't know how to custom expand this!");
-    return;
   case ISD::ADD:
   case ISD::SUB:
     Results.push_back(ExpandADDSUB(N, DAG));
@@ -274,9 +273,8 @@ LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const
     if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
       GVar = dyn_cast_or_null<GlobalVariable>(GA->resolveAliasedGlobal());
   }
-  if (! GVar) {
+  if (!GVar) {
     llvm_unreachable("Thread local object not a GlobalVariable?");
-    return SDValue();
   }
   Type *Ty = cast<PointerType>(GV->getType())->getElementType();
   if (!Ty->isSized() || isZeroLengthArray(Ty)) {
@@ -427,7 +425,7 @@ LowerLOAD(SDValue Op, SelectionDAG &DAG) const {
       //
       return DAG.getLoad(getPointerTy(), DL, Chain, BasePtr,
                          MachinePointerInfo(),
-                         false, false, 0);
+                         false, false, false, 0);
     }
     // Lower to
     // ldw low, base[offset >> 2]
@@ -444,9 +442,11 @@ LowerLOAD(SDValue Op, SelectionDAG &DAG) const {
     SDValue HighAddr = DAG.getNode(ISD::ADD, DL, MVT::i32, Base, HighOffset);
 
     SDValue Low = DAG.getLoad(getPointerTy(), DL, Chain,
-                              LowAddr, MachinePointerInfo(), false, false, 0);
+                              LowAddr, MachinePointerInfo(),
+                              false, false, false, 0);
     SDValue High = DAG.getLoad(getPointerTy(), DL, Chain,
-                               HighAddr, MachinePointerInfo(), false, false, 0);
+                               HighAddr, MachinePointerInfo(),
+                               false, false, false, 0);
     SDValue LowShifted = DAG.getNode(ISD::SRL, DL, MVT::i32, Low, LowShift);
     SDValue HighShifted = DAG.getNode(ISD::SHL, DL, MVT::i32, High, HighShift);
     SDValue Result = DAG.getNode(ISD::OR, DL, MVT::i32, LowShifted, HighShifted);
@@ -487,8 +487,8 @@ LowerLOAD(SDValue Op, SelectionDAG &DAG) const {
 
   std::pair<SDValue, SDValue> CallResult =
         LowerCallTo(Chain, IntPtrTy, false, false,
-                    false, false, 0, CallingConv::C, false,
-                    /*isReturnValueUsed=*/true,
+                    false, false, 0, CallingConv::C, /*isTailCall=*/false,
+                    /*doesNotRet=*/false, /*isReturnValueUsed=*/true,
                     DAG.getExternalSymbol("__misaligned_load", getPointerTy()),
                     Args, DAG, DL);
 
@@ -549,8 +549,8 @@ LowerSTORE(SDValue Op, SelectionDAG &DAG) const
 
   std::pair<SDValue, SDValue> CallResult =
         LowerCallTo(Chain, Type::getVoidTy(*DAG.getContext()), false, false,
-                    false, false, 0, CallingConv::C, false,
-                    /*isReturnValueUsed=*/true,
+                    false, false, 0, CallingConv::C, /*isTailCall=*/false,
+                    /*doesNotRet=*/false, /*isReturnValueUsed=*/true,
                     DAG.getExternalSymbol("__misaligned_store", getPointerTy()),
                     Args, DAG, dl);
 
@@ -754,14 +754,14 @@ SDValue XCoreTargetLowering::
 LowerVAARG(SDValue Op, SelectionDAG &DAG) const
 {
   llvm_unreachable("unimplemented");
-  // FIX Arguments passed by reference need a extra dereference.
+  // FIXME Arguments passed by reference need a extra dereference.
   SDNode *Node = Op.getNode();
   DebugLoc dl = Node->getDebugLoc();
   const Value *V = cast<SrcValueSDNode>(Node->getOperand(2))->getValue();
   EVT VT = Node->getValueType(0);
   SDValue VAList = DAG.getLoad(getPointerTy(), dl, Node->getOperand(0),
                                Node->getOperand(1), MachinePointerInfo(V),
-                               false, false, 0);
+                               false, false, false, 0);
   // Increment the pointer, VAList, to the next vararg
   SDValue Tmp3 = DAG.getNode(ISD::ADD, dl, getPointerTy(), VAList,
                      DAG.getConstant(VT.getSizeInBits(),
@@ -771,7 +771,7 @@ LowerVAARG(SDValue Op, SelectionDAG &DAG) const
                       MachinePointerInfo(V), false, false, 0);
   // Load the actual argument out of the pointer VAList
   return DAG.getLoad(VT, dl, Tmp3, VAList, MachinePointerInfo(),
-                     false, false, 0);
+                     false, false, false, 0);
 }
 
 SDValue XCoreTargetLowering::
@@ -875,7 +875,7 @@ LowerINIT_TRAMPOLINE(SDValue Op, SelectionDAG &DAG) const {
 SDValue
 XCoreTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
                                CallingConv::ID CallConv, bool isVarArg,
-                               bool &isTailCall,
+                               bool doesNotRet, bool &isTailCall,
                                const SmallVectorImpl<ISD::OutputArg> &Outs,
                                const SmallVectorImpl<SDValue> &OutVals,
                                const SmallVectorImpl<ISD::InputArg> &Ins,
@@ -1146,7 +1146,7 @@ XCoreTargetLowering::LowerCCCArguments(SDValue Chain,
       SDValue FIN = DAG.getFrameIndex(FI, MVT::i32);
       InVals.push_back(DAG.getLoad(VA.getLocVT(), dl, Chain, FIN,
                                    MachinePointerInfo::getFixedStack(FI),
-                                   false, false, 0));
+                                   false, false, false, 0));
     }
   }
 
@@ -1599,8 +1599,6 @@ XCoreTargetLowering::isLegalAddressingMode(const AddrMode &AM,
     // reg + reg<<2
     return AM.Scale == 4 && AM.BaseOffs == 0;
   }
-
-  return false;
 }
 
 //===----------------------------------------------------------------------===//