Pulling out previous patch, must've run the tests in

the wrong directory.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109005 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/X86/X86ISelLowering.cpp

@@ -343,9 +343,8 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
   if (Subtarget->hasSSE1())
     setOperationAction(ISD::PREFETCH      , MVT::Other, Legal);
 
-  // We may not have a libcall for MEMBARRIER so we should lower this.
+  if (!Subtarget->hasSSE2())
-  setOperationAction(ISD::MEMBARRIER    , MVT::Other, Custom);
+    setOperationAction(ISD::MEMBARRIER    , MVT::Other, Expand);
-  
   // On X86 and X86-64, atomic operations are lowered to locked instructions.
   // Locked instructions, in turn, have implicit fence semantics (all memory
   // operations are flushed before issuing the locked instruction, and they
@@ -7509,16 +7508,6 @@ SDValue X86TargetLowering::LowerXALUO(SDValue Op, SelectionDAG &DAG) const {
   return Sum;
 }
 
-SDValue X86TargetLowering::LowerMEMBARRIER(SDValue Op, SelectionDAG &DAG) const{
-  DebugLoc dl = Op.getDebugLoc();
-  
-  if (!Subtarget->hasSSE2())
-    return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0),
-                       DAG.getConstant(0, MVT::i32));
-                       
-  return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0));
-}
-
 SDValue X86TargetLowering::LowerCMP_SWAP(SDValue Op, SelectionDAG &DAG) const {
   EVT T = Op.getValueType();
   DebugLoc dl = Op.getDebugLoc();
@@ -7608,7 +7597,6 @@ SDValue X86TargetLowering::LowerLOAD_SUB(SDValue Op, SelectionDAG &DAG) const {
 SDValue X86TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
   switch (Op.getOpcode()) {
   default: llvm_unreachable("Should not custom lower this!");
-  case ISD::MEMBARRIER:         return LowerMEMBARRIER(Op,DAG);
   case ISD::ATOMIC_CMP_SWAP:    return LowerCMP_SWAP(Op,DAG);
   case ISD::ATOMIC_LOAD_SUB:    return LowerLOAD_SUB(Op,DAG);
   case ISD::BUILD_VECTOR:       return LowerBUILD_VECTOR(Op, DAG);

lib/Target/X86/X86ISelLowering.h

@@ -265,10 +265,7 @@ namespace llvm {
       ATOMXOR64_DAG,
       ATOMAND64_DAG,
       ATOMNAND64_DAG,
-      ATOMSWAP64_DAG,
+      ATOMSWAP64_DAG
-      
-      // Memory barrier
-      MEMBARRIER
 
       // WARNING: Do not add anything in the end unless you want the node to
       // have memop! In fact, starting from ATOMADD64_DAG all opcodes will be
@@ -718,7 +715,6 @@ namespace llvm {
     SDValue LowerCMP_SWAP(SDValue Op, SelectionDAG &DAG) const;
     SDValue LowerLOAD_SUB(SDValue Op, SelectionDAG &DAG) const;
     SDValue LowerREADCYCLECOUNTER(SDValue Op, SelectionDAG &DAG) const;
-    SDValue LowerMEMBARRIER(SDValue Op, SelectionDAG &DAG) const;
 
     virtual SDValue
       LowerFormalArguments(SDValue Chain,

lib/Target/X86/X86InstrInfo.td

@@ -80,14 +80,6 @@ def SDT_X86EHRET : SDTypeProfile<0, 1, [SDTCisInt<0>]>;
 
 def SDT_X86TCRET : SDTypeProfile<0, 2, [SDTCisPtrTy<0>, SDTCisVT<1, i32>]>;
 
-def SDT_X86MEMBARRIER : SDTypeProfile<0, 0, []>;
-def SDT_X86MEMBARRIERNoSSE : SDTypeProfile<0, 1, [SDTCisInt<0>]>;
-
-def X86MemBarrier : SDNode<"X86ISD::MEMBARRIER", SDT_X86MEMBARRIER,
-                            [SDNPHasChain]>;
-def X86MemBarrierNoSSE : SDNode<"X86ISD::MEMBARRIER", SDT_X86MEMBARRIERNoSSE,
-                                [SDNPHasChain]>;
-
 def X86bsf     : SDNode<"X86ISD::BSF",      SDTUnaryArithWithFlags>;
 def X86bsr     : SDNode<"X86ISD::BSR",      SDTUnaryArithWithFlags>;
 def X86shld    : SDNode<"X86ISD::SHLD",     SDTIntShiftDOp>;
@@ -3914,19 +3906,6 @@ def EH_RETURN   : I<0xC3, RawFrm, (outs), (ins GR32:$addr),
 // Atomic support
 //
 
-// Memory barriers
-let hasSideEffects = 1 in {
-def Int_MemBarrier : I<0, Pseudo, (outs), (ins),
-                     "#MEMBARRIER",
-                     [(X86MemBarrier)]>, Requires<[HasSSE2]>;
-               
-let Uses = [ESP], isCodeGenOnly = 1 in
-def Int_MemBarrierNoSSE  : I<0x0B, Pseudo, (outs), (ins GR32:$zero),
-                           "lock\n\t"
-                           "or{l}\t{$zero, (%esp)|(%esp), $zero}",
-                           [(X86MemBarrierNoSSE GR32:$zero)]>, LOCK;
-}
-
 // Atomic swap. These are just normal xchg instructions. But since a memory
 // operand is referenced, the atomicity is ensured.
 let Constraints = "$val = $dst" in {