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Add some fairly duplicated code to let type legalization split illegal

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typed atomics. This will lower exclusively to libcalls at the moment.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122979 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2011-01-06 22:28:56 +00:00
parent 01cdc2016d
commit 8d93d19076
3 changed files with 141 additions and 0 deletions
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18
lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
View File

@ -1019,6 +1019,24 @@ void DAGTypeLegalizer::ExpandIntegerResult(SDNode *N, unsigned ResNo) {
case ISD::UREM: ExpandIntRes_UREM(N, Lo, Hi); break;
case ISD::ZERO_EXTEND: ExpandIntRes_ZERO_EXTEND(N, Lo, Hi); break;
case ISD::ATOMIC_LOAD_ADD:
case ISD::ATOMIC_LOAD_SUB:
case ISD::ATOMIC_LOAD_AND:
case ISD::ATOMIC_LOAD_OR:
case ISD::ATOMIC_LOAD_XOR:
case ISD::ATOMIC_LOAD_NAND:
case ISD::ATOMIC_LOAD_MIN:
case ISD::ATOMIC_LOAD_MAX:
case ISD::ATOMIC_LOAD_UMIN:
case ISD::ATOMIC_LOAD_UMAX:
case ISD::ATOMIC_SWAP: {
SDValue Ch = N->getOperand(0);
std::pair<SDValue, SDValue> Tmp = ExpandAtomic(N);
SplitInteger(Tmp.first, Lo, Hi);
ReplaceValueWith(SDValue(N, 1), Tmp.second);
break;
}
case ISD::AND:
case ISD::OR:
case ISD::XOR: ExpandIntRes_Logical(N, Lo, Hi); break;

119
lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
View File

@ -1050,6 +1050,125 @@ SDValue DAGTypeLegalizer::MakeLibCall(RTLIB::Libcall LC, EVT RetVT,
return CallInfo.first;
}
// ExpandChainLibCall - Expand a node into a call to a libcall. Similar to
// ExpandLibCall except that the first operand is the in-chain.
std::pair<SDValue, SDValue>
DAGTypeLegalizer::ExpandChainLibCall(RTLIB::Libcall LC,
SDNode *Node,
bool isSigned) {
SDValue InChain = Node->getOperand(0);
TargetLowering::ArgListTy Args;
TargetLowering::ArgListEntry Entry;
for (unsigned i = 1, e = Node->getNumOperands(); i != e; ++i) {
EVT ArgVT = Node->getOperand(i).getValueType();
const Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
Entry.Node = Node->getOperand(i);
Entry.Ty = ArgTy;
Entry.isSExt = isSigned;
Entry.isZExt = !isSigned;
Args.push_back(Entry);
}
SDValue Callee = DAG.getExternalSymbol(TLI.getLibcallName(LC),
TLI.getPointerTy());
// Splice the libcall in wherever FindInputOutputChains tells us to.
const Type *RetTy = Node->getValueType(0).getTypeForEVT(*DAG.getContext());
std::pair<SDValue, SDValue> CallInfo =
TLI.LowerCallTo(InChain, RetTy, isSigned, !isSigned, false, false,
0, TLI.getLibcallCallingConv(LC), /*isTailCall=*/false,
/*isReturnValueUsed=*/true,
Callee, Args, DAG, Node->getDebugLoc());
return CallInfo;
}
std::pair <SDValue, SDValue> DAGTypeLegalizer::ExpandAtomic(SDNode *Node) {
unsigned Opc = Node->getOpcode();
MVT VT = cast<AtomicSDNode>(Node)->getMemoryVT().getSimpleVT();
RTLIB::Libcall LC;
switch (Opc) {
default:
llvm_unreachable("Unhandled atomic intrinsic Expand!");
break;
case ISD::ATOMIC_SWAP:
switch (VT.SimpleTy) {
default: llvm_unreachable("Unexpected value type for atomic!");
case MVT::i8: LC = RTLIB::SYNC_LOCK_TEST_AND_SET_1; break;
case MVT::i16: LC = RTLIB::SYNC_LOCK_TEST_AND_SET_2; break;
case MVT::i32: LC = RTLIB::SYNC_LOCK_TEST_AND_SET_4; break;
case MVT::i64: LC = RTLIB::SYNC_LOCK_TEST_AND_SET_8; break;
}
break;
case ISD::ATOMIC_CMP_SWAP:
switch (VT.SimpleTy) {
default: llvm_unreachable("Unexpected value type for atomic!");
case MVT::i8: LC = RTLIB::SYNC_VAL_COMPARE_AND_SWAP_1; break;
case MVT::i16: LC = RTLIB::SYNC_VAL_COMPARE_AND_SWAP_2; break;
case MVT::i32: LC = RTLIB::SYNC_VAL_COMPARE_AND_SWAP_4; break;
case MVT::i64: LC = RTLIB::SYNC_VAL_COMPARE_AND_SWAP_8; break;
}
break;
case ISD::ATOMIC_LOAD_ADD:
switch (VT.SimpleTy) {
default: llvm_unreachable("Unexpected value type for atomic!");
case MVT::i8: LC = RTLIB::SYNC_FETCH_AND_ADD_1; break;
case MVT::i16: LC = RTLIB::SYNC_FETCH_AND_ADD_2; break;
case MVT::i32: LC = RTLIB::SYNC_FETCH_AND_ADD_4; break;
case MVT::i64: LC = RTLIB::SYNC_FETCH_AND_ADD_8; break;
}
break;
case ISD::ATOMIC_LOAD_SUB:
switch (VT.SimpleTy) {
default: llvm_unreachable("Unexpected value type for atomic!");
case MVT::i8: LC = RTLIB::SYNC_FETCH_AND_SUB_1; break;
case MVT::i16: LC = RTLIB::SYNC_FETCH_AND_SUB_2; break;
case MVT::i32: LC = RTLIB::SYNC_FETCH_AND_SUB_4; break;
case MVT::i64: LC = RTLIB::SYNC_FETCH_AND_SUB_8; break;
}
break;
case ISD::ATOMIC_LOAD_AND:
switch (VT.SimpleTy) {
default: llvm_unreachable("Unexpected value type for atomic!");
case MVT::i8: LC = RTLIB::SYNC_FETCH_AND_AND_1; break;
case MVT::i16: LC = RTLIB::SYNC_FETCH_AND_AND_2; break;
case MVT::i32: LC = RTLIB::SYNC_FETCH_AND_AND_4; break;
case MVT::i64: LC = RTLIB::SYNC_FETCH_AND_AND_8; break;
}
break;
case ISD::ATOMIC_LOAD_OR:
switch (VT.SimpleTy) {
default: llvm_unreachable("Unexpected value type for atomic!");
case MVT::i8: LC = RTLIB::SYNC_FETCH_AND_OR_1; break;
case MVT::i16: LC = RTLIB::SYNC_FETCH_AND_OR_2; break;
case MVT::i32: LC = RTLIB::SYNC_FETCH_AND_OR_4; break;
case MVT::i64: LC = RTLIB::SYNC_FETCH_AND_OR_8; break;
}
break;
case ISD::ATOMIC_LOAD_XOR:
switch (VT.SimpleTy) {
default: llvm_unreachable("Unexpected value type for atomic!");
case MVT::i8: LC = RTLIB::SYNC_FETCH_AND_XOR_1; break;
case MVT::i16: LC = RTLIB::SYNC_FETCH_AND_XOR_2; break;
case MVT::i32: LC = RTLIB::SYNC_FETCH_AND_XOR_4; break;
case MVT::i64: LC = RTLIB::SYNC_FETCH_AND_XOR_8; break;
}
break;
case ISD::ATOMIC_LOAD_NAND:
switch (VT.SimpleTy) {
default: llvm_unreachable("Unexpected value type for atomic!");
case MVT::i8: LC = RTLIB::SYNC_FETCH_AND_NAND_1; break;
case MVT::i16: LC = RTLIB::SYNC_FETCH_AND_NAND_2; break;
case MVT::i32: LC = RTLIB::SYNC_FETCH_AND_NAND_4; break;
case MVT::i64: LC = RTLIB::SYNC_FETCH_AND_NAND_8; break;
}
break;
}
return ExpandChainLibCall(LC, Node, false);
}
/// PromoteTargetBoolean - Promote the given target boolean to a target boolean
/// of the given type. A target boolean is an integer value, not necessarily of
/// type i1, the bits of which conform to getBooleanContents.

4
lib/CodeGen/SelectionDAG/LegalizeTypes.h
View File

@ -192,6 +192,10 @@ private:
SDValue MakeLibCall(RTLIB::Libcall LC, EVT RetVT,
const SDValue *Ops, unsigned NumOps, bool isSigned,
DebugLoc dl);
std::pair<SDValue, SDValue> ExpandChainLibCall(RTLIB::Libcall LC,
SDNode *Node, bool isSigned);
std::pair<SDValue, SDValue> ExpandAtomic(SDNode *Node);
SDValue PromoteTargetBoolean(SDValue Bool, EVT VT);
void ReplaceValueWith(SDValue From, SDValue To);
void SplitInteger(SDValue Op, SDValue &Lo, SDValue &Hi);