SDNode *SelectAtomic64(SDNode *Node, unsigned Opc);
SDNode *SelectAtomicLoadAdd(SDNode *Node, EVT NVT);
- bool MatchSegmentBaseAddress(SDValue N, X86ISelAddressMode &AM);
- bool MatchLoad(SDValue N, X86ISelAddressMode &AM);
+ bool MatchLoadInAddress(LoadSDNode *N, X86ISelAddressMode &AM);
bool MatchWrapper(SDValue N, X86ISelAddressMode &AM);
bool MatchAddress(SDValue N, X86ISelAddressMode &AM);
bool MatchAddressRecursively(SDValue N, X86ISelAddressMode &AM,
unsigned Depth);
bool MatchAddressBase(SDValue N, X86ISelAddressMode &AM);
- bool SelectAddr(SDValue N, SDValue &Base,
+ bool SelectAddr(SDNode *Parent, SDValue N, SDValue &Base,
SDValue &Scale, SDValue &Index, SDValue &Disp,
SDValue &Segment);
bool SelectLEAAddr(SDValue N, SDValue &Base,
LD->getExtensionType() != ISD::NON_EXTLOAD)
return false;
- // FIXME: Calls can't fold loads through segment registers yet.
- if (LD->getPointerInfo().getAddrSpace() > 255)
- return false;
-
// Now let's find the callseq_start.
while (HasCallSeq && Chain.getOpcode() != ISD::CALLSEQ_START) {
if (!Chain.hasOneUse())
}
-bool X86DAGToDAGISel::MatchSegmentBaseAddress(SDValue N,
- X86ISelAddressMode &AM) {
- assert(N.getOpcode() == X86ISD::SegmentBaseAddress);
- SDValue Segment = N.getOperand(0);
-
- if (AM.Segment.getNode() == 0) {
- AM.Segment = Segment;
- return false;
- }
-
- return true;
-}
-
-bool X86DAGToDAGISel::MatchLoad(SDValue N, X86ISelAddressMode &AM) {
+bool X86DAGToDAGISel::MatchLoadInAddress(LoadSDNode *N, X86ISelAddressMode &AM){
+ SDValue Address = N->getOperand(1);
+
+ // load gs:0 -> GS segment register.
+ // load fs:0 -> FS segment register.
+ //
// This optimization is valid because the GNU TLS model defines that
// gs:0 (or fs:0 on X86-64) contains its own address.
// For more information see http://people.redhat.com/drepper/tls.pdf
-
- SDValue Address = N.getOperand(1);
- if (Address.getOpcode() == X86ISD::SegmentBaseAddress &&
- !MatchSegmentBaseAddress(Address, AM))
- return false;
-
+ if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Address))
+ if (C->getSExtValue() == 0 && AM.Segment.getNode() == 0 &&
+ Subtarget->isTargetELF())
+ switch (N->getPointerInfo().getAddrSpace()) {
+ case 256:
+ AM.Segment = CurDAG->getRegister(X86::GS, MVT::i16);
+ return false;
+ case 257:
+ AM.Segment = CurDAG->getRegister(X86::FS, MVT::i16);
+ return false;
+ }
+
return true;
}
break;
}
- case X86ISD::SegmentBaseAddress:
- if (!MatchSegmentBaseAddress(N, AM))
- return false;
- break;
-
case X86ISD::Wrapper:
case X86ISD::WrapperRIP:
if (!MatchWrapper(N, AM))
break;
case ISD::LOAD:
- if (!MatchLoad(N, AM))
+ if (!MatchLoadInAddress(cast<LoadSDNode>(N), AM))
return false;
break;
/// SelectAddr - returns true if it is able pattern match an addressing mode.
/// It returns the operands which make up the maximal addressing mode it can
/// match by reference.
-bool X86DAGToDAGISel::SelectAddr(SDValue N, SDValue &Base,
+///
+/// Parent is the parent node of the addr operand that is being matched. It
+/// is always a load, store, atomic node, or null. It is only null when
+/// checking memory operands for inline asm nodes.
+bool X86DAGToDAGISel::SelectAddr(SDNode *Parent, SDValue N, SDValue &Base,
SDValue &Scale, SDValue &Index,
SDValue &Disp, SDValue &Segment) {
X86ISelAddressMode AM;
+
+ if (Parent &&
+ // This list of opcodes are all the nodes that have an "addr:$ptr" operand
+ // that are not a MemSDNode, and thus don't have proper addrspace info.
+ Parent->getOpcode() != ISD::INTRINSIC_W_CHAIN && // unaligned loads, fixme
+ Parent->getOpcode() != ISD::INTRINSIC_VOID && // nontemporal stores
+ Parent->getOpcode() != X86ISD::TLSCALL) { // Fixme
+ unsigned AddrSpace =
+ cast<MemSDNode>(Parent)->getPointerInfo().getAddrSpace();
+ // AddrSpace 256 -> GS, 257 -> FS.
+ if (AddrSpace == 256)
+ AM.Segment = CurDAG->getRegister(X86::GS, MVT::i16);
+ if (AddrSpace == 257)
+ AM.Segment = CurDAG->getRegister(X86::FS, MVT::i16);
+ }
+
if (MatchAddress(N, AM))
return false;
IsProfitableToFold(N.getOperand(0), N.getNode(), Root) &&
IsLegalToFold(N.getOperand(0), N.getNode(), Root, OptLevel)) {
LoadSDNode *LD = cast<LoadSDNode>(PatternNodeWithChain);
- if (!SelectAddr(LD->getBasePtr(), Base, Scale, Index, Disp,Segment))
+ if (!SelectAddr(LD, LD->getBasePtr(), Base, Scale, Index, Disp, Segment))
return false;
return true;
}
IsLegalToFold(N.getOperand(0), N.getNode(), Root, OptLevel)) {
// Okay, this is a zero extending load. Fold it.
LoadSDNode *LD = cast<LoadSDNode>(N.getOperand(0).getOperand(0));
- if (!SelectAddr(LD->getBasePtr(), Base, Scale, Index, Disp, Segment))
+ if (!SelectAddr(LD, LD->getBasePtr(), Base, Scale, Index, Disp, Segment))
return false;
PatternNodeWithChain = SDValue(LD, 0);
return true;
!IsLegalToFold(N, P, P, OptLevel))
return false;
- return SelectAddr(N.getOperand(1), Base, Scale, Index, Disp, Segment);
+ return SelectAddr(N.getNode(),
+ N.getOperand(1), Base, Scale, Index, Disp, Segment);
}
/// getGlobalBaseReg - Return an SDNode that returns the value of
SDValue In2L = Node->getOperand(2);
SDValue In2H = Node->getOperand(3);
SDValue Tmp0, Tmp1, Tmp2, Tmp3, Tmp4;
- if (!SelectAddr(In1, Tmp0, Tmp1, Tmp2, Tmp3, Tmp4))
+ if (!SelectAddr(Node, In1, Tmp0, Tmp1, Tmp2, Tmp3, Tmp4))
return NULL;
MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
MemOp[0] = cast<MemSDNode>(Node)->getMemOperand();
SDValue Ptr = Node->getOperand(1);
SDValue Val = Node->getOperand(2);
SDValue Tmp0, Tmp1, Tmp2, Tmp3, Tmp4;
- if (!SelectAddr(Ptr, Tmp0, Tmp1, Tmp2, Tmp3, Tmp4))
+ if (!SelectAddr(Node, Ptr, Tmp0, Tmp1, Tmp2, Tmp3, Tmp4))
return 0;
bool isInc = false, isDec = false, isSub = false, isCN = false;
case 'v': // not offsetable ??
default: return true;
case 'm': // memory
- if (!SelectAddr(Op, Op0, Op1, Op2, Op3, Op4))
+ if (!SelectAddr(0, Op, Op0, Op1, Op2, Op3, Op4))
return true;
break;
}
projects / oota-llvm.git / blobdiff