//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "systemz-lower"
-
#include "SystemZISelLowering.h"
#include "SystemZCallingConv.h"
#include "SystemZConstantPoolValue.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
+#include <cctype>
using namespace llvm;
+#define DEBUG_TYPE "systemz-lower"
+
+namespace {
+// Represents a sequence for extracting a 0/1 value from an IPM result:
+// (((X ^ XORValue) + AddValue) >> Bit)
+struct IPMConversion {
+ IPMConversion(unsigned xorValue, int64_t addValue, unsigned bit)
+ : XORValue(xorValue), AddValue(addValue), Bit(bit) {}
+
+ int64_t XORValue;
+ int64_t AddValue;
+ unsigned Bit;
+};
+
+// Represents information about a comparison.
+struct Comparison {
+ Comparison(SDValue Op0In, SDValue Op1In)
+ : Op0(Op0In), Op1(Op1In), Opcode(0), ICmpType(0), CCValid(0), CCMask(0) {}
+
+ // The operands to the comparison.
+ SDValue Op0, Op1;
+
+ // The opcode that should be used to compare Op0 and Op1.
+ unsigned Opcode;
+
+ // A SystemZICMP value. Only used for integer comparisons.
+ unsigned ICmpType;
+
+ // The mask of CC values that Opcode can produce.
+ unsigned CCValid;
+
+ // The mask of CC values for which the original condition is true.
+ unsigned CCMask;
+};
+} // end anonymous namespace
+
// Classify VT as either 32 or 64 bit.
static bool is32Bit(EVT VT) {
switch (VT.getSimpleVT().SimpleTy) {
MVT PtrVT = getPointerTy();
// Set up the register classes.
- addRegisterClass(MVT::i32, &SystemZ::GR32BitRegClass);
+ if (Subtarget.hasHighWord())
+ addRegisterClass(MVT::i32, &SystemZ::GRX32BitRegClass);
+ else
+ addRegisterClass(MVT::i32, &SystemZ::GR32BitRegClass);
addRegisterClass(MVT::i64, &SystemZ::GR64BitRegClass);
addRegisterClass(MVT::f32, &SystemZ::FP32BitRegClass);
addRegisterClass(MVT::f64, &SystemZ::FP64BitRegClass);
++I) {
MVT VT = MVT::SimpleValueType(I);
if (isTypeLegal(VT)) {
- // Expand SETCC(X, Y, COND) into SELECT_CC(X, Y, 1, 0, COND).
- setOperationAction(ISD::SETCC, VT, Expand);
+ // Lower SET_CC into an IPM-based sequence.
+ setOperationAction(ISD::SETCC, VT, Custom);
// Expand SELECT(C, A, B) into SELECT_CC(X, 0, A, B, NE).
setOperationAction(ISD::SELECT, VT, Expand);
setOperationAction(ISD::SDIVREM, VT, Custom);
setOperationAction(ISD::UDIVREM, VT, Custom);
- // Expand ATOMIC_LOAD and ATOMIC_STORE using ATOMIC_CMP_SWAP.
- // FIXME: probably much too conservative.
- setOperationAction(ISD::ATOMIC_LOAD, VT, Expand);
- setOperationAction(ISD::ATOMIC_STORE, VT, Expand);
+ // Lower ATOMIC_LOAD and ATOMIC_STORE into normal volatile loads and
+ // stores, putting a serialization instruction after the stores.
+ setOperationAction(ISD::ATOMIC_LOAD, VT, Custom);
+ setOperationAction(ISD::ATOMIC_STORE, VT, Custom);
+
+ // Lower ATOMIC_LOAD_SUB into ATOMIC_LOAD_ADD if LAA and LAAG are
+ // available, or if the operand is constant.
+ setOperationAction(ISD::ATOMIC_LOAD_SUB, VT, Custom);
// No special instructions for these.
setOperationAction(ISD::CTPOP, VT, Expand);
setOperationAction(ISD::SMUL_LOHI, VT, Custom);
setOperationAction(ISD::UMUL_LOHI, VT, Custom);
- // We have instructions for signed but not unsigned FP conversion.
- setOperationAction(ISD::FP_TO_UINT, VT, Expand);
+ // Only z196 and above have native support for conversions to unsigned.
+ if (!Subtarget.hasFPExtension())
+ setOperationAction(ISD::FP_TO_UINT, VT, Expand);
}
}
setOperationAction(ISD::ATOMIC_LOAD_UMAX, MVT::i32, Custom);
setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i32, Custom);
- // We have instructions for signed but not unsigned FP conversion.
+ // z10 has instructions for signed but not unsigned FP conversion.
// Handle unsigned 32-bit types as signed 64-bit types.
- setOperationAction(ISD::UINT_TO_FP, MVT::i32, Promote);
- setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
+ if (!Subtarget.hasFPExtension()) {
+ setOperationAction(ISD::UINT_TO_FP, MVT::i32, Promote);
+ setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
+ }
// We have native support for a 64-bit CTLZ, via FLOGR.
setOperationAction(ISD::CTLZ, MVT::i32, Promote);
setOperationAction(ISD::STACKSAVE, MVT::Other, Custom);
setOperationAction(ISD::STACKRESTORE, MVT::Other, Custom);
+ // Handle prefetches with PFD or PFDRL.
+ setOperationAction(ISD::PREFETCH, MVT::Other, Custom);
+
// Handle floating-point types.
for (unsigned I = MVT::FIRST_FP_VALUETYPE;
I <= MVT::LAST_FP_VALUETYPE;
setOperationAction(ISD::VACOPY, MVT::Other, Custom);
setOperationAction(ISD::VAEND, MVT::Other, Expand);
+ // Codes for which we want to perform some z-specific combinations.
+ setTargetDAGCombine(ISD::SIGN_EXTEND);
+
// We want to use MVC in preference to even a single load/store pair.
MaxStoresPerMemcpy = 0;
MaxStoresPerMemcpyOptSize = 0;
MaxStoresPerMemsetOptSize = 0;
}
-bool
-SystemZTargetLowering::isFMAFasterThanFMulAndFAdd(EVT VT) const {
+EVT SystemZTargetLowering::getSetCCResultType(LLVMContext &, EVT VT) const {
+ if (!VT.isVector())
+ return MVT::i32;
+ return VT.changeVectorElementTypeToInteger();
+}
+
+bool SystemZTargetLowering::isFMAFasterThanFMulAndFAdd(EVT VT) const {
VT = VT.getScalarType();
if (!VT.isSimple())
}
bool SystemZTargetLowering::allowsUnalignedMemoryAccesses(EVT VT,
+ unsigned,
bool *Fast) const {
// Unaligned accesses should never be slower than the expanded version.
// We check specifically for aligned accesses in the few cases where
case 'a': // Address register
case 'd': // Data register (equivalent to 'r')
case 'f': // Floating-point register
+ case 'h': // High-part register
case 'r': // General-purpose register
return C_RegisterClass;
Value *CallOperandVal = info.CallOperandVal;
// If we don't have a value, we can't do a match,
// but allow it at the lowest weight.
- if (CallOperandVal == NULL)
+ if (!CallOperandVal)
return CW_Default;
Type *type = CallOperandVal->getType();
// Look at the constraint type.
case 'a': // Address register
case 'd': // Data register (equivalent to 'r')
+ case 'h': // High-part register
case 'r': // General-purpose register
if (CallOperandVal->getType()->isIntegerTy())
weight = CW_Register;
break;
case 'I': // Unsigned 8-bit constant
- if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal))
+ if (auto *C = dyn_cast<ConstantInt>(CallOperandVal))
if (isUInt<8>(C->getZExtValue()))
weight = CW_Constant;
break;
case 'J': // Unsigned 12-bit constant
- if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal))
+ if (auto *C = dyn_cast<ConstantInt>(CallOperandVal))
if (isUInt<12>(C->getZExtValue()))
weight = CW_Constant;
break;
case 'K': // Signed 16-bit constant
- if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal))
+ if (auto *C = dyn_cast<ConstantInt>(CallOperandVal))
if (isInt<16>(C->getSExtValue()))
weight = CW_Constant;
break;
case 'L': // Signed 20-bit displacement (on all targets we support)
- if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal))
+ if (auto *C = dyn_cast<ConstantInt>(CallOperandVal))
if (isInt<20>(C->getSExtValue()))
weight = CW_Constant;
break;
case 'M': // 0x7fffffff
- if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal))
+ if (auto *C = dyn_cast<ConstantInt>(CallOperandVal))
if (C->getZExtValue() == 0x7fffffff)
weight = CW_Constant;
break;
if (Index < 16 && Map[Index])
return std::make_pair(Map[Index], RC);
}
- return std::make_pair(0u, static_cast<TargetRegisterClass*>(0));
+ return std::make_pair(0U, nullptr);
}
std::pair<unsigned, const TargetRegisterClass *> SystemZTargetLowering::
return std::make_pair(0U, &SystemZ::ADDR128BitRegClass);
return std::make_pair(0U, &SystemZ::ADDR32BitRegClass);
+ case 'h': // High-part register (an LLVM extension)
+ return std::make_pair(0U, &SystemZ::GRH32BitRegClass);
+
case 'f': // Floating-point register
if (VT == MVT::f64)
return std::make_pair(0U, &SystemZ::FP64BitRegClass);
if (Constraint.length() == 1) {
switch (Constraint[0]) {
case 'I': // Unsigned 8-bit constant
- if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op))
+ if (auto *C = dyn_cast<ConstantSDNode>(Op))
if (isUInt<8>(C->getZExtValue()))
Ops.push_back(DAG.getTargetConstant(C->getZExtValue(),
Op.getValueType()));
return;
case 'J': // Unsigned 12-bit constant
- if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op))
+ if (auto *C = dyn_cast<ConstantSDNode>(Op))
if (isUInt<12>(C->getZExtValue()))
Ops.push_back(DAG.getTargetConstant(C->getZExtValue(),
Op.getValueType()));
return;
case 'K': // Signed 16-bit constant
- if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op))
+ if (auto *C = dyn_cast<ConstantSDNode>(Op))
if (isInt<16>(C->getSExtValue()))
Ops.push_back(DAG.getTargetConstant(C->getSExtValue(),
Op.getValueType()));
return;
case 'L': // Signed 20-bit displacement (on all targets we support)
- if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op))
+ if (auto *C = dyn_cast<ConstantSDNode>(Op))
if (isInt<20>(C->getSExtValue()))
Ops.push_back(DAG.getTargetConstant(C->getSExtValue(),
Op.getValueType()));
return;
case 'M': // 0x7fffffff
- if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op))
+ if (auto *C = dyn_cast<ConstantSDNode>(Op))
if (C->getZExtValue() == 0x7fffffff)
Ops.push_back(DAG.getTargetConstant(C->getZExtValue(),
Op.getValueType()));
MachineRegisterInfo &MRI = MF.getRegInfo();
SystemZMachineFunctionInfo *FuncInfo =
MF.getInfo<SystemZMachineFunctionInfo>();
- const SystemZFrameLowering *TFL =
- static_cast<const SystemZFrameLowering *>(TM.getFrameLowering());
+ auto *TFL = static_cast<const SystemZFrameLowering *>(TM.getFrameLowering());
// Assign locations to all of the incoming arguments.
SmallVector<CCValAssign, 16> ArgLocs;
}
// Join the stores, which are independent of one another.
Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
- &MemOps[NumFixedFPRs],
- SystemZ::NumArgFPRs - NumFixedFPRs);
+ ArrayRef<SDValue>(&MemOps[NumFixedFPRs],
+ SystemZ::NumArgFPRs-NumFixedFPRs));
}
}
if (!VA.isRegLoc())
return false;
unsigned Reg = VA.getLocReg();
- if (Reg == SystemZ::R6W || Reg == SystemZ::R6D)
+ if (Reg == SystemZ::R6H || Reg == SystemZ::R6L || Reg == SystemZ::R6D)
return false;
}
return true;
// Join the stores, which are independent of one another.
if (!MemOpChains.empty())
- Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
- &MemOpChains[0], MemOpChains.size());
+ Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, MemOpChains);
// Accept direct calls by converting symbolic call addresses to the
// associated Target* opcodes. Force %r1 to be used for indirect
// tail calls.
SDValue Glue;
- if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
+ if (auto *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
Callee = DAG.getTargetGlobalAddress(G->getGlobal(), DL, PtrVT);
Callee = DAG.getNode(SystemZISD::PCREL_WRAPPER, DL, PtrVT, Callee);
- } else if (ExternalSymbolSDNode *E = dyn_cast<ExternalSymbolSDNode>(Callee)) {
+ } else if (auto *E = dyn_cast<ExternalSymbolSDNode>(Callee)) {
Callee = DAG.getTargetExternalSymbol(E->getSymbol(), PtrVT);
Callee = DAG.getNode(SystemZISD::PCREL_WRAPPER, DL, PtrVT, Callee);
} else if (IsTailCall) {
// Emit the call.
SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
if (IsTailCall)
- return DAG.getNode(SystemZISD::SIBCALL, DL, NodeTys, &Ops[0], Ops.size());
- Chain = DAG.getNode(SystemZISD::CALL, DL, NodeTys, &Ops[0], Ops.size());
+ return DAG.getNode(SystemZISD::SIBCALL, DL, NodeTys, Ops);
+ Chain = DAG.getNode(SystemZISD::CALL, DL, NodeTys, Ops);
Glue = Chain.getValue(1);
// Mark the end of the call, which is glued to the call itself.
if (Glue.getNode())
RetOps.push_back(Glue);
- return DAG.getNode(SystemZISD::RET_FLAG, DL, MVT::Other,
- RetOps.data(), RetOps.size());
+ return DAG.getNode(SystemZISD::RET_FLAG, DL, MVT::Other, RetOps);
+}
+
+SDValue SystemZTargetLowering::
+prepareVolatileOrAtomicLoad(SDValue Chain, SDLoc DL, SelectionDAG &DAG) const {
+ return DAG.getNode(SystemZISD::SERIALIZE, DL, MVT::Other, Chain);
}
// CC is a comparison that will be implemented using an integer or
#undef CONV
}
-// If a comparison described by IsUnsigned, CCMask, CmpOp0 and CmpOp1
-// can be converted to a comparison against zero, adjust the operands
+// Return a sequence for getting a 1 from an IPM result when CC has a
+// value in CCMask and a 0 when CC has a value in CCValid & ~CCMask.
+// The handling of CC values outside CCValid doesn't matter.
+static IPMConversion getIPMConversion(unsigned CCValid, unsigned CCMask) {
+ // Deal with cases where the result can be taken directly from a bit
+ // of the IPM result.
+ if (CCMask == (CCValid & (SystemZ::CCMASK_1 | SystemZ::CCMASK_3)))
+ return IPMConversion(0, 0, SystemZ::IPM_CC);
+ if (CCMask == (CCValid & (SystemZ::CCMASK_2 | SystemZ::CCMASK_3)))
+ return IPMConversion(0, 0, SystemZ::IPM_CC + 1);
+
+ // Deal with cases where we can add a value to force the sign bit
+ // to contain the right value. Putting the bit in 31 means we can
+ // use SRL rather than RISBG(L), and also makes it easier to get a
+ // 0/-1 value, so it has priority over the other tests below.
+ //
+ // These sequences rely on the fact that the upper two bits of the
+ // IPM result are zero.
+ uint64_t TopBit = uint64_t(1) << 31;
+ if (CCMask == (CCValid & SystemZ::CCMASK_0))
+ return IPMConversion(0, -(1 << SystemZ::IPM_CC), 31);
+ if (CCMask == (CCValid & (SystemZ::CCMASK_0 | SystemZ::CCMASK_1)))
+ return IPMConversion(0, -(2 << SystemZ::IPM_CC), 31);
+ if (CCMask == (CCValid & (SystemZ::CCMASK_0
+ | SystemZ::CCMASK_1
+ | SystemZ::CCMASK_2)))
+ return IPMConversion(0, -(3 << SystemZ::IPM_CC), 31);
+ if (CCMask == (CCValid & SystemZ::CCMASK_3))
+ return IPMConversion(0, TopBit - (3 << SystemZ::IPM_CC), 31);
+ if (CCMask == (CCValid & (SystemZ::CCMASK_1
+ | SystemZ::CCMASK_2
+ | SystemZ::CCMASK_3)))
+ return IPMConversion(0, TopBit - (1 << SystemZ::IPM_CC), 31);
+
+ // Next try inverting the value and testing a bit. 0/1 could be
+ // handled this way too, but we dealt with that case above.
+ if (CCMask == (CCValid & (SystemZ::CCMASK_0 | SystemZ::CCMASK_2)))
+ return IPMConversion(-1, 0, SystemZ::IPM_CC);
+
+ // Handle cases where adding a value forces a non-sign bit to contain
+ // the right value.
+ if (CCMask == (CCValid & (SystemZ::CCMASK_1 | SystemZ::CCMASK_2)))
+ return IPMConversion(0, 1 << SystemZ::IPM_CC, SystemZ::IPM_CC + 1);
+ if (CCMask == (CCValid & (SystemZ::CCMASK_0 | SystemZ::CCMASK_3)))
+ return IPMConversion(0, -(1 << SystemZ::IPM_CC), SystemZ::IPM_CC + 1);
+
+ // The remaining cases are 1, 2, 0/1/3 and 0/2/3. All these are
+ // can be done by inverting the low CC bit and applying one of the
+ // sign-based extractions above.
+ if (CCMask == (CCValid & SystemZ::CCMASK_1))
+ return IPMConversion(1 << SystemZ::IPM_CC, -(1 << SystemZ::IPM_CC), 31);
+ if (CCMask == (CCValid & SystemZ::CCMASK_2))
+ return IPMConversion(1 << SystemZ::IPM_CC,
+ TopBit - (3 << SystemZ::IPM_CC), 31);
+ if (CCMask == (CCValid & (SystemZ::CCMASK_0
+ | SystemZ::CCMASK_1
+ | SystemZ::CCMASK_3)))
+ return IPMConversion(1 << SystemZ::IPM_CC, -(3 << SystemZ::IPM_CC), 31);
+ if (CCMask == (CCValid & (SystemZ::CCMASK_0
+ | SystemZ::CCMASK_2
+ | SystemZ::CCMASK_3)))
+ return IPMConversion(1 << SystemZ::IPM_CC,
+ TopBit - (1 << SystemZ::IPM_CC), 31);
+
+ llvm_unreachable("Unexpected CC combination");
+}
+
+// If C can be converted to a comparison against zero, adjust the operands
// as necessary.
-static void adjustZeroCmp(SelectionDAG &DAG, bool &IsUnsigned,
- SDValue &CmpOp0, SDValue &CmpOp1,
- unsigned &CCMask) {
- if (IsUnsigned)
+static void adjustZeroCmp(SelectionDAG &DAG, Comparison &C) {
+ if (C.ICmpType == SystemZICMP::UnsignedOnly)
return;
- ConstantSDNode *ConstOp1 = dyn_cast<ConstantSDNode>(CmpOp1.getNode());
+ auto *ConstOp1 = dyn_cast<ConstantSDNode>(C.Op1.getNode());
if (!ConstOp1)
return;
int64_t Value = ConstOp1->getSExtValue();
- if ((Value == -1 && CCMask == SystemZ::CCMASK_CMP_GT) ||
- (Value == -1 && CCMask == SystemZ::CCMASK_CMP_LE) ||
- (Value == 1 && CCMask == SystemZ::CCMASK_CMP_LT) ||
- (Value == 1 && CCMask == SystemZ::CCMASK_CMP_GE)) {
- CCMask ^= SystemZ::CCMASK_CMP_EQ;
- CmpOp1 = DAG.getConstant(0, CmpOp1.getValueType());
+ if ((Value == -1 && C.CCMask == SystemZ::CCMASK_CMP_GT) ||
+ (Value == -1 && C.CCMask == SystemZ::CCMASK_CMP_LE) ||
+ (Value == 1 && C.CCMask == SystemZ::CCMASK_CMP_LT) ||
+ (Value == 1 && C.CCMask == SystemZ::CCMASK_CMP_GE)) {
+ C.CCMask ^= SystemZ::CCMASK_CMP_EQ;
+ C.Op1 = DAG.getConstant(0, C.Op1.getValueType());
}
}
-// If a comparison described by IsUnsigned, CCMask, CmpOp0 and CmpOp1
-// is suitable for CLI(Y), CHHSI or CLHHSI, adjust the operands as necessary.
-static void adjustSubwordCmp(SelectionDAG &DAG, bool &IsUnsigned,
- SDValue &CmpOp0, SDValue &CmpOp1,
- unsigned &CCMask) {
+// If a comparison described by C is suitable for CLI(Y), CHHSI or CLHHSI,
+// adjust the operands as necessary.
+static void adjustSubwordCmp(SelectionDAG &DAG, Comparison &C) {
// For us to make any changes, it must a comparison between a single-use
// load and a constant.
- if (!CmpOp0.hasOneUse() ||
- CmpOp0.getOpcode() != ISD::LOAD ||
- CmpOp1.getOpcode() != ISD::Constant)
+ if (!C.Op0.hasOneUse() ||
+ C.Op0.getOpcode() != ISD::LOAD ||
+ C.Op1.getOpcode() != ISD::Constant)
return;
// We must have an 8- or 16-bit load.
- LoadSDNode *Load = cast<LoadSDNode>(CmpOp0);
+ auto *Load = cast<LoadSDNode>(C.Op0);
unsigned NumBits = Load->getMemoryVT().getStoreSizeInBits();
if (NumBits != 8 && NumBits != 16)
return;
// The load must be an extending one and the constant must be within the
// range of the unextended value.
- ConstantSDNode *Constant = cast<ConstantSDNode>(CmpOp1);
- uint64_t Value = Constant->getZExtValue();
+ auto *ConstOp1 = cast<ConstantSDNode>(C.Op1);
+ uint64_t Value = ConstOp1->getZExtValue();
uint64_t Mask = (1 << NumBits) - 1;
if (Load->getExtensionType() == ISD::SEXTLOAD) {
- int64_t SignedValue = Constant->getSExtValue();
- if (uint64_t(SignedValue) + (1ULL << (NumBits - 1)) > Mask)
+ // Make sure that ConstOp1 is in range of C.Op0.
+ int64_t SignedValue = ConstOp1->getSExtValue();
+ if (uint64_t(SignedValue) + (uint64_t(1) << (NumBits - 1)) > Mask)
return;
- // Unsigned comparison between two sign-extended values is equivalent
- // to unsigned comparison between two zero-extended values.
- if (IsUnsigned)
+ if (C.ICmpType != SystemZICMP::SignedOnly) {
+ // Unsigned comparison between two sign-extended values is equivalent
+ // to unsigned comparison between two zero-extended values.
Value &= Mask;
- else if (CCMask == SystemZ::CCMASK_CMP_EQ ||
- CCMask == SystemZ::CCMASK_CMP_NE)
- // Any choice of IsUnsigned is OK for equality comparisons.
- // We could use either CHHSI or CLHHSI for 16-bit comparisons,
- // but since we use CLHHSI for zero extensions, it seems better
- // to be consistent and do the same here.
- Value &= Mask, IsUnsigned = true;
- else if (NumBits == 8) {
+ } else if (NumBits == 8) {
// Try to treat the comparison as unsigned, so that we can use CLI.
// Adjust CCMask and Value as necessary.
- if (Value == 0 && CCMask == SystemZ::CCMASK_CMP_LT)
+ if (Value == 0 && C.CCMask == SystemZ::CCMASK_CMP_LT)
// Test whether the high bit of the byte is set.
- Value = 127, CCMask = SystemZ::CCMASK_CMP_GT, IsUnsigned = true;
- else if (Value == 0 && CCMask == SystemZ::CCMASK_CMP_GE)
+ Value = 127, C.CCMask = SystemZ::CCMASK_CMP_GT;
+ else if (Value == 0 && C.CCMask == SystemZ::CCMASK_CMP_GE)
// Test whether the high bit of the byte is clear.
- Value = 128, CCMask = SystemZ::CCMASK_CMP_LT, IsUnsigned = true;
+ Value = 128, C.CCMask = SystemZ::CCMASK_CMP_LT;
else
// No instruction exists for this combination.
return;
+ C.ICmpType = SystemZICMP::UnsignedOnly;
}
} else if (Load->getExtensionType() == ISD::ZEXTLOAD) {
if (Value > Mask)
return;
- // Signed comparison between two zero-extended values is equivalent
- // to unsigned comparison.
- IsUnsigned = true;
+ assert(C.ICmpType == SystemZICMP::Any &&
+ "Signedness shouldn't matter here.");
} else
return;
// Make sure that the first operand is an i32 of the right extension type.
- ISD::LoadExtType ExtType = IsUnsigned ? ISD::ZEXTLOAD : ISD::SEXTLOAD;
- if (CmpOp0.getValueType() != MVT::i32 ||
+ ISD::LoadExtType ExtType = (C.ICmpType == SystemZICMP::SignedOnly ?
+ ISD::SEXTLOAD :
+ ISD::ZEXTLOAD);
+ if (C.Op0.getValueType() != MVT::i32 ||
Load->getExtensionType() != ExtType)
- CmpOp0 = DAG.getExtLoad(ExtType, SDLoc(Load), MVT::i32,
- Load->getChain(), Load->getBasePtr(),
- Load->getPointerInfo(), Load->getMemoryVT(),
- Load->isVolatile(), Load->isNonTemporal(),
- Load->getAlignment());
+ C.Op0 = DAG.getExtLoad(ExtType, SDLoc(Load), MVT::i32,
+ Load->getChain(), Load->getBasePtr(),
+ Load->getPointerInfo(), Load->getMemoryVT(),
+ Load->isVolatile(), Load->isNonTemporal(),
+ Load->getAlignment());
// Make sure that the second operand is an i32 with the right value.
- if (CmpOp1.getValueType() != MVT::i32 ||
- Value != Constant->getZExtValue())
- CmpOp1 = DAG.getConstant(Value, MVT::i32);
-}
-
-// Return true if a comparison described by CCMask, CmpOp0 and CmpOp1
-// is an equality comparison that is better implemented using unsigned
-// rather than signed comparison instructions.
-static bool preferUnsignedComparison(SelectionDAG &DAG, SDValue CmpOp0,
- SDValue CmpOp1, unsigned CCMask) {
- // The test must be for equality or inequality.
- if (CCMask != SystemZ::CCMASK_CMP_EQ && CCMask != SystemZ::CCMASK_CMP_NE)
+ if (C.Op1.getValueType() != MVT::i32 ||
+ Value != ConstOp1->getZExtValue())
+ C.Op1 = DAG.getConstant(Value, MVT::i32);
+}
+
+// Return true if Op is either an unextended load, or a load suitable
+// for integer register-memory comparisons of type ICmpType.
+static bool isNaturalMemoryOperand(SDValue Op, unsigned ICmpType) {
+ auto *Load = dyn_cast<LoadSDNode>(Op.getNode());
+ if (Load) {
+ // There are no instructions to compare a register with a memory byte.
+ if (Load->getMemoryVT() == MVT::i8)
+ return false;
+ // Otherwise decide on extension type.
+ switch (Load->getExtensionType()) {
+ case ISD::NON_EXTLOAD:
+ return true;
+ case ISD::SEXTLOAD:
+ return ICmpType != SystemZICMP::UnsignedOnly;
+ case ISD::ZEXTLOAD:
+ return ICmpType != SystemZICMP::SignedOnly;
+ default:
+ break;
+ }
+ }
+ return false;
+}
+
+// Return true if it is better to swap the operands of C.
+static bool shouldSwapCmpOperands(const Comparison &C) {
+ // Leave f128 comparisons alone, since they have no memory forms.
+ if (C.Op0.getValueType() == MVT::f128)
return false;
- if (CmpOp1.getOpcode() == ISD::Constant) {
- uint64_t Value = cast<ConstantSDNode>(CmpOp1)->getSExtValue();
+ // Always keep a floating-point constant second, since comparisons with
+ // zero can use LOAD TEST and comparisons with other constants make a
+ // natural memory operand.
+ if (isa<ConstantFPSDNode>(C.Op1))
+ return false;
- // If we're comparing with memory, prefer unsigned comparisons for
- // values that are in the unsigned 16-bit range but not the signed
- // 16-bit range. We want to use CLFHSI and CLGHSI.
- if (CmpOp0.hasOneUse() &&
- ISD::isNormalLoad(CmpOp0.getNode()) &&
- (Value >= 32768 && Value < 65536))
- return true;
+ // Never swap comparisons with zero since there are many ways to optimize
+ // those later.
+ auto *ConstOp1 = dyn_cast<ConstantSDNode>(C.Op1);
+ if (ConstOp1 && ConstOp1->getZExtValue() == 0)
+ return false;
+
+ // Also keep natural memory operands second if the loaded value is
+ // only used here. Several comparisons have memory forms.
+ if (isNaturalMemoryOperand(C.Op1, C.ICmpType) && C.Op1.hasOneUse())
+ return false;
- // Use unsigned comparisons for values that are in the CLGFI range
- // but not in the CGFI range.
- if (CmpOp0.getValueType() == MVT::i64 && (Value >> 31) == 1)
+ // Look for cases where Cmp0 is a single-use load and Cmp1 isn't.
+ // In that case we generally prefer the memory to be second.
+ if (isNaturalMemoryOperand(C.Op0, C.ICmpType) && C.Op0.hasOneUse()) {
+ // The only exceptions are when the second operand is a constant and
+ // we can use things like CHHSI.
+ if (!ConstOp1)
return true;
+ // The unsigned memory-immediate instructions can handle 16-bit
+ // unsigned integers.
+ if (C.ICmpType != SystemZICMP::SignedOnly &&
+ isUInt<16>(ConstOp1->getZExtValue()))
+ return false;
+ // The signed memory-immediate instructions can handle 16-bit
+ // signed integers.
+ if (C.ICmpType != SystemZICMP::UnsignedOnly &&
+ isInt<16>(ConstOp1->getSExtValue()))
+ return false;
+ return true;
+ }
+
+ // Try to promote the use of CGFR and CLGFR.
+ unsigned Opcode0 = C.Op0.getOpcode();
+ if (C.ICmpType != SystemZICMP::UnsignedOnly && Opcode0 == ISD::SIGN_EXTEND)
+ return true;
+ if (C.ICmpType != SystemZICMP::SignedOnly && Opcode0 == ISD::ZERO_EXTEND)
+ return true;
+ if (C.ICmpType != SystemZICMP::SignedOnly &&
+ Opcode0 == ISD::AND &&
+ C.Op0.getOperand(1).getOpcode() == ISD::Constant &&
+ cast<ConstantSDNode>(C.Op0.getOperand(1))->getZExtValue() == 0xffffffff)
+ return true;
+ return false;
+}
+
+// Return a version of comparison CC mask CCMask in which the LT and GT
+// actions are swapped.
+static unsigned reverseCCMask(unsigned CCMask) {
+ return ((CCMask & SystemZ::CCMASK_CMP_EQ) |
+ (CCMask & SystemZ::CCMASK_CMP_GT ? SystemZ::CCMASK_CMP_LT : 0) |
+ (CCMask & SystemZ::CCMASK_CMP_LT ? SystemZ::CCMASK_CMP_GT : 0) |
+ (CCMask & SystemZ::CCMASK_CMP_UO));
+}
+
+// Check whether C tests for equality between X and Y and whether X - Y
+// or Y - X is also computed. In that case it's better to compare the
+// result of the subtraction against zero.
+static void adjustForSubtraction(SelectionDAG &DAG, Comparison &C) {
+ if (C.CCMask == SystemZ::CCMASK_CMP_EQ ||
+ C.CCMask == SystemZ::CCMASK_CMP_NE) {
+ for (auto I = C.Op0->use_begin(), E = C.Op0->use_end(); I != E; ++I) {
+ SDNode *N = *I;
+ if (N->getOpcode() == ISD::SUB &&
+ ((N->getOperand(0) == C.Op0 && N->getOperand(1) == C.Op1) ||
+ (N->getOperand(0) == C.Op1 && N->getOperand(1) == C.Op0))) {
+ C.Op0 = SDValue(N, 0);
+ C.Op1 = DAG.getConstant(0, N->getValueType(0));
+ return;
+ }
+ }
+ }
+}
+
+// Check whether C compares a floating-point value with zero and if that
+// floating-point value is also negated. In this case we can use the
+// negation to set CC, so avoiding separate LOAD AND TEST and
+// LOAD (NEGATIVE/COMPLEMENT) instructions.
+static void adjustForFNeg(Comparison &C) {
+ auto *C1 = dyn_cast<ConstantFPSDNode>(C.Op1);
+ if (C1 && C1->isZero()) {
+ for (auto I = C.Op0->use_begin(), E = C.Op0->use_end(); I != E; ++I) {
+ SDNode *N = *I;
+ if (N->getOpcode() == ISD::FNEG) {
+ C.Op0 = SDValue(N, 0);
+ C.CCMask = reverseCCMask(C.CCMask);
+ return;
+ }
+ }
+ }
+}
+
+// Check whether C compares (shl X, 32) with 0 and whether X is
+// also sign-extended. In that case it is better to test the result
+// of the sign extension using LTGFR.
+//
+// This case is important because InstCombine transforms a comparison
+// with (sext (trunc X)) into a comparison with (shl X, 32).
+static void adjustForLTGFR(Comparison &C) {
+ // Check for a comparison between (shl X, 32) and 0.
+ if (C.Op0.getOpcode() == ISD::SHL &&
+ C.Op0.getValueType() == MVT::i64 &&
+ C.Op1.getOpcode() == ISD::Constant &&
+ cast<ConstantSDNode>(C.Op1)->getZExtValue() == 0) {
+ auto *C1 = dyn_cast<ConstantSDNode>(C.Op0.getOperand(1));
+ if (C1 && C1->getZExtValue() == 32) {
+ SDValue ShlOp0 = C.Op0.getOperand(0);
+ // See whether X has any SIGN_EXTEND_INREG uses.
+ for (auto I = ShlOp0->use_begin(), E = ShlOp0->use_end(); I != E; ++I) {
+ SDNode *N = *I;
+ if (N->getOpcode() == ISD::SIGN_EXTEND_INREG &&
+ cast<VTSDNode>(N->getOperand(1))->getVT() == MVT::i32) {
+ C.Op0 = SDValue(N, 0);
+ return;
+ }
+ }
+ }
+ }
+}
+
+// If C compares the truncation of an extending load, try to compare
+// the untruncated value instead. This exposes more opportunities to
+// reuse CC.
+static void adjustICmpTruncate(SelectionDAG &DAG, Comparison &C) {
+ if (C.Op0.getOpcode() == ISD::TRUNCATE &&
+ C.Op0.getOperand(0).getOpcode() == ISD::LOAD &&
+ C.Op1.getOpcode() == ISD::Constant &&
+ cast<ConstantSDNode>(C.Op1)->getZExtValue() == 0) {
+ auto *L = cast<LoadSDNode>(C.Op0.getOperand(0));
+ if (L->getMemoryVT().getStoreSizeInBits()
+ <= C.Op0.getValueType().getSizeInBits()) {
+ unsigned Type = L->getExtensionType();
+ if ((Type == ISD::ZEXTLOAD && C.ICmpType != SystemZICMP::SignedOnly) ||
+ (Type == ISD::SEXTLOAD && C.ICmpType != SystemZICMP::UnsignedOnly)) {
+ C.Op0 = C.Op0.getOperand(0);
+ C.Op1 = DAG.getConstant(0, C.Op0.getValueType());
+ }
+ }
+ }
+}
+
+// Return true if shift operation N has an in-range constant shift value.
+// Store it in ShiftVal if so.
+static bool isSimpleShift(SDValue N, unsigned &ShiftVal) {
+ auto *Shift = dyn_cast<ConstantSDNode>(N.getOperand(1));
+ if (!Shift)
return false;
+
+ uint64_t Amount = Shift->getZExtValue();
+ if (Amount >= N.getValueType().getSizeInBits())
+ return false;
+
+ ShiftVal = Amount;
+ return true;
+}
+
+// Check whether an AND with Mask is suitable for a TEST UNDER MASK
+// instruction and whether the CC value is descriptive enough to handle
+// a comparison of type Opcode between the AND result and CmpVal.
+// CCMask says which comparison result is being tested and BitSize is
+// the number of bits in the operands. If TEST UNDER MASK can be used,
+// return the corresponding CC mask, otherwise return 0.
+static unsigned getTestUnderMaskCond(unsigned BitSize, unsigned CCMask,
+ uint64_t Mask, uint64_t CmpVal,
+ unsigned ICmpType) {
+ assert(Mask != 0 && "ANDs with zero should have been removed by now");
+
+ // Check whether the mask is suitable for TMHH, TMHL, TMLH or TMLL.
+ if (!SystemZ::isImmLL(Mask) && !SystemZ::isImmLH(Mask) &&
+ !SystemZ::isImmHL(Mask) && !SystemZ::isImmHH(Mask))
+ return 0;
+
+ // Work out the masks for the lowest and highest bits.
+ unsigned HighShift = 63 - countLeadingZeros(Mask);
+ uint64_t High = uint64_t(1) << HighShift;
+ uint64_t Low = uint64_t(1) << countTrailingZeros(Mask);
+
+ // Signed ordered comparisons are effectively unsigned if the sign
+ // bit is dropped.
+ bool EffectivelyUnsigned = (ICmpType != SystemZICMP::SignedOnly);
+
+ // Check for equality comparisons with 0, or the equivalent.
+ if (CmpVal == 0) {
+ if (CCMask == SystemZ::CCMASK_CMP_EQ)
+ return SystemZ::CCMASK_TM_ALL_0;
+ if (CCMask == SystemZ::CCMASK_CMP_NE)
+ return SystemZ::CCMASK_TM_SOME_1;
+ }
+ if (EffectivelyUnsigned && CmpVal <= Low) {
+ if (CCMask == SystemZ::CCMASK_CMP_LT)
+ return SystemZ::CCMASK_TM_ALL_0;
+ if (CCMask == SystemZ::CCMASK_CMP_GE)
+ return SystemZ::CCMASK_TM_SOME_1;
+ }
+ if (EffectivelyUnsigned && CmpVal < Low) {
+ if (CCMask == SystemZ::CCMASK_CMP_LE)
+ return SystemZ::CCMASK_TM_ALL_0;
+ if (CCMask == SystemZ::CCMASK_CMP_GT)
+ return SystemZ::CCMASK_TM_SOME_1;
}
- // Prefer CL for zero-extended loads.
- if (CmpOp1.getOpcode() == ISD::ZERO_EXTEND ||
- ISD::isZEXTLoad(CmpOp1.getNode()))
- return true;
+ // Check for equality comparisons with the mask, or the equivalent.
+ if (CmpVal == Mask) {
+ if (CCMask == SystemZ::CCMASK_CMP_EQ)
+ return SystemZ::CCMASK_TM_ALL_1;
+ if (CCMask == SystemZ::CCMASK_CMP_NE)
+ return SystemZ::CCMASK_TM_SOME_0;
+ }
+ if (EffectivelyUnsigned && CmpVal >= Mask - Low && CmpVal < Mask) {
+ if (CCMask == SystemZ::CCMASK_CMP_GT)
+ return SystemZ::CCMASK_TM_ALL_1;
+ if (CCMask == SystemZ::CCMASK_CMP_LE)
+ return SystemZ::CCMASK_TM_SOME_0;
+ }
+ if (EffectivelyUnsigned && CmpVal > Mask - Low && CmpVal <= Mask) {
+ if (CCMask == SystemZ::CCMASK_CMP_GE)
+ return SystemZ::CCMASK_TM_ALL_1;
+ if (CCMask == SystemZ::CCMASK_CMP_LT)
+ return SystemZ::CCMASK_TM_SOME_0;
+ }
- // ...and for "in-register" zero extensions.
- if (CmpOp1.getOpcode() == ISD::AND && CmpOp1.getValueType() == MVT::i64) {
- SDValue Mask = CmpOp1.getOperand(1);
- if (Mask.getOpcode() == ISD::Constant &&
- cast<ConstantSDNode>(Mask)->getZExtValue() == 0xffffffff)
- return true;
+ // Check for ordered comparisons with the top bit.
+ if (EffectivelyUnsigned && CmpVal >= Mask - High && CmpVal < High) {
+ if (CCMask == SystemZ::CCMASK_CMP_LE)
+ return SystemZ::CCMASK_TM_MSB_0;
+ if (CCMask == SystemZ::CCMASK_CMP_GT)
+ return SystemZ::CCMASK_TM_MSB_1;
+ }
+ if (EffectivelyUnsigned && CmpVal > Mask - High && CmpVal <= High) {
+ if (CCMask == SystemZ::CCMASK_CMP_LT)
+ return SystemZ::CCMASK_TM_MSB_0;
+ if (CCMask == SystemZ::CCMASK_CMP_GE)
+ return SystemZ::CCMASK_TM_MSB_1;
}
- return false;
+ // If there are just two bits, we can do equality checks for Low and High
+ // as well.
+ if (Mask == Low + High) {
+ if (CCMask == SystemZ::CCMASK_CMP_EQ && CmpVal == Low)
+ return SystemZ::CCMASK_TM_MIXED_MSB_0;
+ if (CCMask == SystemZ::CCMASK_CMP_NE && CmpVal == Low)
+ return SystemZ::CCMASK_TM_MIXED_MSB_0 ^ SystemZ::CCMASK_ANY;
+ if (CCMask == SystemZ::CCMASK_CMP_EQ && CmpVal == High)
+ return SystemZ::CCMASK_TM_MIXED_MSB_1;
+ if (CCMask == SystemZ::CCMASK_CMP_NE && CmpVal == High)
+ return SystemZ::CCMASK_TM_MIXED_MSB_1 ^ SystemZ::CCMASK_ANY;
+ }
+
+ // Looks like we've exhausted our options.
+ return 0;
}
-// Return a target node that compares CmpOp0 with CmpOp1 and stores a
-// 2-bit result in CC. Set CCValid to the CCMASK_* of all possible
-// 2-bit results and CCMask to the subset of those results that are
-// associated with Cond.
-static SDValue emitCmp(SelectionDAG &DAG, SDValue CmpOp0, SDValue CmpOp1,
- ISD::CondCode Cond, unsigned &CCValid,
- unsigned &CCMask) {
- bool IsUnsigned = false;
- CCMask = CCMaskForCondCode(Cond);
- if (CmpOp0.getValueType().isFloatingPoint())
- CCValid = SystemZ::CCMASK_FCMP;
- else {
- IsUnsigned = CCMask & SystemZ::CCMASK_CMP_UO;
- CCValid = SystemZ::CCMASK_ICMP;
- CCMask &= CCValid;
- adjustZeroCmp(DAG, IsUnsigned, CmpOp0, CmpOp1, CCMask);
- adjustSubwordCmp(DAG, IsUnsigned, CmpOp0, CmpOp1, CCMask);
- if (preferUnsignedComparison(DAG, CmpOp0, CmpOp1, CCMask))
- IsUnsigned = true;
+// See whether C can be implemented as a TEST UNDER MASK instruction.
+// Update the arguments with the TM version if so.
+static void adjustForTestUnderMask(SelectionDAG &DAG, Comparison &C) {
+ // Check that we have a comparison with a constant.
+ auto *ConstOp1 = dyn_cast<ConstantSDNode>(C.Op1);
+ if (!ConstOp1)
+ return;
+ uint64_t CmpVal = ConstOp1->getZExtValue();
+
+ // Check whether the nonconstant input is an AND with a constant mask.
+ Comparison NewC(C);
+ uint64_t MaskVal;
+ ConstantSDNode *Mask = nullptr;
+ if (C.Op0.getOpcode() == ISD::AND) {
+ NewC.Op0 = C.Op0.getOperand(0);
+ NewC.Op1 = C.Op0.getOperand(1);
+ Mask = dyn_cast<ConstantSDNode>(NewC.Op1);
+ if (!Mask)
+ return;
+ MaskVal = Mask->getZExtValue();
+ } else {
+ // There is no instruction to compare with a 64-bit immediate
+ // so use TMHH instead if possible. We need an unsigned ordered
+ // comparison with an i64 immediate.
+ if (NewC.Op0.getValueType() != MVT::i64 ||
+ NewC.CCMask == SystemZ::CCMASK_CMP_EQ ||
+ NewC.CCMask == SystemZ::CCMASK_CMP_NE ||
+ NewC.ICmpType == SystemZICMP::SignedOnly)
+ return;
+ // Convert LE and GT comparisons into LT and GE.
+ if (NewC.CCMask == SystemZ::CCMASK_CMP_LE ||
+ NewC.CCMask == SystemZ::CCMASK_CMP_GT) {
+ if (CmpVal == uint64_t(-1))
+ return;
+ CmpVal += 1;
+ NewC.CCMask ^= SystemZ::CCMASK_CMP_EQ;
+ }
+ // If the low N bits of Op1 are zero than the low N bits of Op0 can
+ // be masked off without changing the result.
+ MaskVal = -(CmpVal & -CmpVal);
+ NewC.ICmpType = SystemZICMP::UnsignedOnly;
+ }
+
+ // Check whether the combination of mask, comparison value and comparison
+ // type are suitable.
+ unsigned BitSize = NewC.Op0.getValueType().getSizeInBits();
+ unsigned NewCCMask, ShiftVal;
+ if (NewC.ICmpType != SystemZICMP::SignedOnly &&
+ NewC.Op0.getOpcode() == ISD::SHL &&
+ isSimpleShift(NewC.Op0, ShiftVal) &&
+ (NewCCMask = getTestUnderMaskCond(BitSize, NewC.CCMask,
+ MaskVal >> ShiftVal,
+ CmpVal >> ShiftVal,
+ SystemZICMP::Any))) {
+ NewC.Op0 = NewC.Op0.getOperand(0);
+ MaskVal >>= ShiftVal;
+ } else if (NewC.ICmpType != SystemZICMP::SignedOnly &&
+ NewC.Op0.getOpcode() == ISD::SRL &&
+ isSimpleShift(NewC.Op0, ShiftVal) &&
+ (NewCCMask = getTestUnderMaskCond(BitSize, NewC.CCMask,
+ MaskVal << ShiftVal,
+ CmpVal << ShiftVal,
+ SystemZICMP::UnsignedOnly))) {
+ NewC.Op0 = NewC.Op0.getOperand(0);
+ MaskVal <<= ShiftVal;
+ } else {
+ NewCCMask = getTestUnderMaskCond(BitSize, NewC.CCMask, MaskVal, CmpVal,
+ NewC.ICmpType);
+ if (!NewCCMask)
+ return;
+ }
+
+ // Go ahead and make the change.
+ C.Opcode = SystemZISD::TM;
+ C.Op0 = NewC.Op0;
+ if (Mask && Mask->getZExtValue() == MaskVal)
+ C.Op1 = SDValue(Mask, 0);
+ else
+ C.Op1 = DAG.getConstant(MaskVal, C.Op0.getValueType());
+ C.CCValid = SystemZ::CCMASK_TM;
+ C.CCMask = NewCCMask;
+}
+
+// Decide how to implement a comparison of type Cond between CmpOp0 with CmpOp1.
+static Comparison getCmp(SelectionDAG &DAG, SDValue CmpOp0, SDValue CmpOp1,
+ ISD::CondCode Cond) {
+ Comparison C(CmpOp0, CmpOp1);
+ C.CCMask = CCMaskForCondCode(Cond);
+ if (C.Op0.getValueType().isFloatingPoint()) {
+ C.CCValid = SystemZ::CCMASK_FCMP;
+ C.Opcode = SystemZISD::FCMP;
+ adjustForFNeg(C);
+ } else {
+ C.CCValid = SystemZ::CCMASK_ICMP;
+ C.Opcode = SystemZISD::ICMP;
+ // Choose the type of comparison. Equality and inequality tests can
+ // use either signed or unsigned comparisons. The choice also doesn't
+ // matter if both sign bits are known to be clear. In those cases we
+ // want to give the main isel code the freedom to choose whichever
+ // form fits best.
+ if (C.CCMask == SystemZ::CCMASK_CMP_EQ ||
+ C.CCMask == SystemZ::CCMASK_CMP_NE ||
+ (DAG.SignBitIsZero(C.Op0) && DAG.SignBitIsZero(C.Op1)))
+ C.ICmpType = SystemZICMP::Any;
+ else if (C.CCMask & SystemZ::CCMASK_CMP_UO)
+ C.ICmpType = SystemZICMP::UnsignedOnly;
+ else
+ C.ICmpType = SystemZICMP::SignedOnly;
+ C.CCMask &= ~SystemZ::CCMASK_CMP_UO;
+ adjustZeroCmp(DAG, C);
+ adjustSubwordCmp(DAG, C);
+ adjustForSubtraction(DAG, C);
+ adjustForLTGFR(C);
+ adjustICmpTruncate(DAG, C);
}
- SDLoc DL(CmpOp0);
- return DAG.getNode((IsUnsigned ? SystemZISD::UCMP : SystemZISD::CMP),
- DL, MVT::Glue, CmpOp0, CmpOp1);
+ if (shouldSwapCmpOperands(C)) {
+ std::swap(C.Op0, C.Op1);
+ C.CCMask = reverseCCMask(C.CCMask);
+ }
+
+ adjustForTestUnderMask(DAG, C);
+ return C;
+}
+
+// Emit the comparison instruction described by C.
+static SDValue emitCmp(SelectionDAG &DAG, SDLoc DL, Comparison &C) {
+ if (C.Opcode == SystemZISD::ICMP)
+ return DAG.getNode(SystemZISD::ICMP, DL, MVT::Glue, C.Op0, C.Op1,
+ DAG.getConstant(C.ICmpType, MVT::i32));
+ if (C.Opcode == SystemZISD::TM) {
+ bool RegisterOnly = (bool(C.CCMask & SystemZ::CCMASK_TM_MIXED_MSB_0) !=
+ bool(C.CCMask & SystemZ::CCMASK_TM_MIXED_MSB_1));
+ return DAG.getNode(SystemZISD::TM, DL, MVT::Glue, C.Op0, C.Op1,
+ DAG.getConstant(RegisterOnly, MVT::i32));
+ }
+ return DAG.getNode(C.Opcode, DL, MVT::Glue, C.Op0, C.Op1);
}
// Implement a 32-bit *MUL_LOHI operation by extending both operands to
SDValue Result = DAG.getNode(Opcode, DL, MVT::Untyped,
SDValue(In128, 0), Op1);
bool Is32Bit = is32Bit(VT);
- SDValue SubReg0 = DAG.getTargetConstant(SystemZ::even128(Is32Bit), VT);
- SDValue SubReg1 = DAG.getTargetConstant(SystemZ::odd128(Is32Bit), VT);
- SDNode *Reg0 = DAG.getMachineNode(TargetOpcode::EXTRACT_SUBREG, DL,
- VT, Result, SubReg0);
- SDNode *Reg1 = DAG.getMachineNode(TargetOpcode::EXTRACT_SUBREG, DL,
- VT, Result, SubReg1);
- Even = SDValue(Reg0, 0);
- Odd = SDValue(Reg1, 0);
+ Even = DAG.getTargetExtractSubreg(SystemZ::even128(Is32Bit), DL, VT, Result);
+ Odd = DAG.getTargetExtractSubreg(SystemZ::odd128(Is32Bit), DL, VT, Result);
+}
+
+// Return an i32 value that is 1 if the CC value produced by Glue is
+// in the mask CCMask and 0 otherwise. CC is known to have a value
+// in CCValid, so other values can be ignored.
+static SDValue emitSETCC(SelectionDAG &DAG, SDLoc DL, SDValue Glue,
+ unsigned CCValid, unsigned CCMask) {
+ IPMConversion Conversion = getIPMConversion(CCValid, CCMask);
+ SDValue Result = DAG.getNode(SystemZISD::IPM, DL, MVT::i32, Glue);
+
+ if (Conversion.XORValue)
+ Result = DAG.getNode(ISD::XOR, DL, MVT::i32, Result,
+ DAG.getConstant(Conversion.XORValue, MVT::i32));
+
+ if (Conversion.AddValue)
+ Result = DAG.getNode(ISD::ADD, DL, MVT::i32, Result,
+ DAG.getConstant(Conversion.AddValue, MVT::i32));
+
+ // The SHR/AND sequence should get optimized to an RISBG.
+ Result = DAG.getNode(ISD::SRL, DL, MVT::i32, Result,
+ DAG.getConstant(Conversion.Bit, MVT::i32));
+ if (Conversion.Bit != 31)
+ Result = DAG.getNode(ISD::AND, DL, MVT::i32, Result,
+ DAG.getConstant(1, MVT::i32));
+ return Result;
+}
+
+SDValue SystemZTargetLowering::lowerSETCC(SDValue Op,
+ SelectionDAG &DAG) const {
+ SDValue CmpOp0 = Op.getOperand(0);
+ SDValue CmpOp1 = Op.getOperand(1);
+ ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
+ SDLoc DL(Op);
+
+ Comparison C(getCmp(DAG, CmpOp0, CmpOp1, CC));
+ SDValue Glue = emitCmp(DAG, DL, C);
+ return emitSETCC(DAG, DL, Glue, C.CCValid, C.CCMask);
}
SDValue SystemZTargetLowering::lowerBR_CC(SDValue Op, SelectionDAG &DAG) const {
SDValue Dest = Op.getOperand(4);
SDLoc DL(Op);
- unsigned CCValid, CCMask;
- SDValue Flags = emitCmp(DAG, CmpOp0, CmpOp1, CC, CCValid, CCMask);
+ Comparison C(getCmp(DAG, CmpOp0, CmpOp1, CC));
+ SDValue Glue = emitCmp(DAG, DL, C);
return DAG.getNode(SystemZISD::BR_CCMASK, DL, Op.getValueType(),
- Chain, DAG.getConstant(CCValid, MVT::i32),
- DAG.getConstant(CCMask, MVT::i32), Dest, Flags);
+ Chain, DAG.getConstant(C.CCValid, MVT::i32),
+ DAG.getConstant(C.CCMask, MVT::i32), Dest, Glue);
+}
+
+// Return true if Pos is CmpOp and Neg is the negative of CmpOp,
+// allowing Pos and Neg to be wider than CmpOp.
+static bool isAbsolute(SDValue CmpOp, SDValue Pos, SDValue Neg) {
+ return (Neg.getOpcode() == ISD::SUB &&
+ Neg.getOperand(0).getOpcode() == ISD::Constant &&
+ cast<ConstantSDNode>(Neg.getOperand(0))->getZExtValue() == 0 &&
+ Neg.getOperand(1) == Pos &&
+ (Pos == CmpOp ||
+ (Pos.getOpcode() == ISD::SIGN_EXTEND &&
+ Pos.getOperand(0) == CmpOp)));
+}
+
+// Return the absolute or negative absolute of Op; IsNegative decides which.
+static SDValue getAbsolute(SelectionDAG &DAG, SDLoc DL, SDValue Op,
+ bool IsNegative) {
+ Op = DAG.getNode(SystemZISD::IABS, DL, Op.getValueType(), Op);
+ if (IsNegative)
+ Op = DAG.getNode(ISD::SUB, DL, Op.getValueType(),
+ DAG.getConstant(0, Op.getValueType()), Op);
+ return Op;
}
SDValue SystemZTargetLowering::lowerSELECT_CC(SDValue Op,
ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
SDLoc DL(Op);
- unsigned CCValid, CCMask;
- SDValue Flags = emitCmp(DAG, CmpOp0, CmpOp1, CC, CCValid, CCMask);
+ Comparison C(getCmp(DAG, CmpOp0, CmpOp1, CC));
+
+ // Check for absolute and negative-absolute selections, including those
+ // where the comparison value is sign-extended (for LPGFR and LNGFR).
+ // This check supplements the one in DAGCombiner.
+ if (C.Opcode == SystemZISD::ICMP &&
+ C.CCMask != SystemZ::CCMASK_CMP_EQ &&
+ C.CCMask != SystemZ::CCMASK_CMP_NE &&
+ C.Op1.getOpcode() == ISD::Constant &&
+ cast<ConstantSDNode>(C.Op1)->getZExtValue() == 0) {
+ if (isAbsolute(C.Op0, TrueOp, FalseOp))
+ return getAbsolute(DAG, DL, TrueOp, C.CCMask & SystemZ::CCMASK_CMP_LT);
+ if (isAbsolute(C.Op0, FalseOp, TrueOp))
+ return getAbsolute(DAG, DL, FalseOp, C.CCMask & SystemZ::CCMASK_CMP_GT);
+ }
+
+ SDValue Glue = emitCmp(DAG, DL, C);
+
+ // Special case for handling -1/0 results. The shifts we use here
+ // should get optimized with the IPM conversion sequence.
+ auto *TrueC = dyn_cast<ConstantSDNode>(TrueOp);
+ auto *FalseC = dyn_cast<ConstantSDNode>(FalseOp);
+ if (TrueC && FalseC) {
+ int64_t TrueVal = TrueC->getSExtValue();
+ int64_t FalseVal = FalseC->getSExtValue();
+ if ((TrueVal == -1 && FalseVal == 0) || (TrueVal == 0 && FalseVal == -1)) {
+ // Invert the condition if we want -1 on false.
+ if (TrueVal == 0)
+ C.CCMask ^= C.CCValid;
+ SDValue Result = emitSETCC(DAG, DL, Glue, C.CCValid, C.CCMask);
+ EVT VT = Op.getValueType();
+ // Extend the result to VT. Upper bits are ignored.
+ if (!is32Bit(VT))
+ Result = DAG.getNode(ISD::ANY_EXTEND, DL, VT, Result);
+ // Sign-extend from the low bit.
+ SDValue ShAmt = DAG.getConstant(VT.getSizeInBits() - 1, MVT::i32);
+ SDValue Shl = DAG.getNode(ISD::SHL, DL, VT, Result, ShAmt);
+ return DAG.getNode(ISD::SRA, DL, VT, Shl, ShAmt);
+ }
+ }
SmallVector<SDValue, 5> Ops;
Ops.push_back(TrueOp);
Ops.push_back(FalseOp);
- Ops.push_back(DAG.getConstant(CCValid, MVT::i32));
- Ops.push_back(DAG.getConstant(CCMask, MVT::i32));
- Ops.push_back(Flags);
+ Ops.push_back(DAG.getConstant(C.CCValid, MVT::i32));
+ Ops.push_back(DAG.getConstant(C.CCMask, MVT::i32));
+ Ops.push_back(Glue);
SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::Glue);
- return DAG.getNode(SystemZISD::SELECT_CCMASK, DL, VTs, &Ops[0], Ops.size());
+ return DAG.getNode(SystemZISD::SELECT_CCMASK, DL, VTs, Ops);
}
SDValue SystemZTargetLowering::lowerGlobalAddress(GlobalAddressSDNode *Node,
SDValue Result;
if (Subtarget.isPC32DBLSymbol(GV, RM, CM)) {
- // Make sure that the offset is aligned to a halfword. If it isn't,
- // create an "anchor" at the previous 12-bit boundary.
- // FIXME check whether there is a better way of handling this.
- if (Offset & 1) {
- Result = DAG.getTargetGlobalAddress(GV, DL, PtrVT,
- Offset & ~uint64_t(0xfff));
- Offset &= 0xfff;
- } else {
- Result = DAG.getTargetGlobalAddress(GV, DL, PtrVT, Offset);
+ // Assign anchors at 1<<12 byte boundaries.
+ uint64_t Anchor = Offset & ~uint64_t(0xfff);
+ Result = DAG.getTargetGlobalAddress(GV, DL, PtrVT, Anchor);
+ Result = DAG.getNode(SystemZISD::PCREL_WRAPPER, DL, PtrVT, Result);
+
+ // The offset can be folded into the address if it is aligned to a halfword.
+ Offset -= Anchor;
+ if (Offset != 0 && (Offset & 1) == 0) {
+ SDValue Full = DAG.getTargetGlobalAddress(GV, DL, PtrVT, Anchor + Offset);
+ Result = DAG.getNode(SystemZISD::PCREL_OFFSET, DL, PtrVT, Full, Result);
Offset = 0;
}
- Result = DAG.getNode(SystemZISD::PCREL_WRAPPER, DL, PtrVT, Result);
} else {
Result = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0, SystemZII::MO_GOT);
Result = DAG.getNode(SystemZISD::PCREL_WRAPPER, DL, PtrVT, Result);
EVT InVT = In.getValueType();
EVT ResVT = Op.getValueType();
- SDValue SubReg32 = DAG.getTargetConstant(SystemZ::subreg_32bit, MVT::i64);
- SDValue Shift32 = DAG.getConstant(32, MVT::i64);
if (InVT == MVT::i32 && ResVT == MVT::f32) {
- SDValue In64 = DAG.getNode(ISD::ANY_EXTEND, DL, MVT::i64, In);
- SDValue Shift = DAG.getNode(ISD::SHL, DL, MVT::i64, In64, Shift32);
- SDValue Out64 = DAG.getNode(ISD::BITCAST, DL, MVT::f64, Shift);
- SDNode *Out = DAG.getMachineNode(TargetOpcode::EXTRACT_SUBREG, DL,
- MVT::f32, Out64, SubReg32);
- return SDValue(Out, 0);
+ SDValue In64;
+ if (Subtarget.hasHighWord()) {
+ SDNode *U64 = DAG.getMachineNode(TargetOpcode::IMPLICIT_DEF, DL,
+ MVT::i64);
+ In64 = DAG.getTargetInsertSubreg(SystemZ::subreg_h32, DL,
+ MVT::i64, SDValue(U64, 0), In);
+ } else {
+ In64 = DAG.getNode(ISD::ANY_EXTEND, DL, MVT::i64, In);
+ In64 = DAG.getNode(ISD::SHL, DL, MVT::i64, In64,
+ DAG.getConstant(32, MVT::i64));
+ }
+ SDValue Out64 = DAG.getNode(ISD::BITCAST, DL, MVT::f64, In64);
+ return DAG.getTargetExtractSubreg(SystemZ::subreg_h32,
+ DL, MVT::f32, Out64);
}
if (InVT == MVT::f32 && ResVT == MVT::i32) {
SDNode *U64 = DAG.getMachineNode(TargetOpcode::IMPLICIT_DEF, DL, MVT::f64);
- SDNode *In64 = DAG.getMachineNode(TargetOpcode::INSERT_SUBREG, DL,
- MVT::f64, SDValue(U64, 0), In, SubReg32);
- SDValue Out64 = DAG.getNode(ISD::BITCAST, DL, MVT::i64, SDValue(In64, 0));
- SDValue Shift = DAG.getNode(ISD::SRL, DL, MVT::i64, Out64, Shift32);
- SDValue Out = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, Shift);
- return Out;
+ SDValue In64 = DAG.getTargetInsertSubreg(SystemZ::subreg_h32, DL,
+ MVT::f64, SDValue(U64, 0), In);
+ SDValue Out64 = DAG.getNode(ISD::BITCAST, DL, MVT::i64, In64);
+ if (Subtarget.hasHighWord())
+ return DAG.getTargetExtractSubreg(SystemZ::subreg_h32, DL,
+ MVT::i32, Out64);
+ SDValue Shift = DAG.getNode(ISD::SRL, DL, MVT::i64, Out64,
+ DAG.getConstant(32, MVT::i64));
+ return DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, Shift);
}
llvm_unreachable("Unexpected bitcast combination");
}
false, false, 0);
Offset += 8;
}
- return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, MemOps, NumFields);
+ return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, MemOps);
}
SDValue SystemZTargetLowering::lowerVACOPY(SDValue Op,
SDValue Result = DAG.getNode(ISD::ADD, DL, MVT::i64, NewSP, ArgAdjust);
SDValue Ops[2] = { Result, Chain };
- return DAG.getMergeValues(Ops, 2, DL);
+ return DAG.getMergeValues(Ops, DL);
}
SDValue SystemZTargetLowering::lowerSMUL_LOHI(SDValue Op,
SDValue NegSum = DAG.getNode(ISD::ADD, DL, VT, NegLLTimesRH, NegLHTimesRL);
Ops[1] = DAG.getNode(ISD::SUB, DL, VT, Ops[1], NegSum);
}
- return DAG.getMergeValues(Ops, 2, DL);
+ return DAG.getMergeValues(Ops, DL);
}
SDValue SystemZTargetLowering::lowerUMUL_LOHI(SDValue Op,
// low half first, so the results are in reverse order.
lowerGR128Binary(DAG, DL, VT, SystemZ::AEXT128_64, SystemZISD::UMUL_LOHI64,
Op.getOperand(0), Op.getOperand(1), Ops[1], Ops[0]);
- return DAG.getMergeValues(Ops, 2, DL);
+ return DAG.getMergeValues(Ops, DL);
}
SDValue SystemZTargetLowering::lowerSDIVREM(SDValue Op,
SDValue Ops[2];
lowerGR128Binary(DAG, DL, VT, SystemZ::AEXT128_64, Opcode,
Op0, Op1, Ops[1], Ops[0]);
- return DAG.getMergeValues(Ops, 2, DL);
+ return DAG.getMergeValues(Ops, DL);
}
SDValue SystemZTargetLowering::lowerUDIVREM(SDValue Op,
else
lowerGR128Binary(DAG, DL, VT, SystemZ::ZEXT128_64, SystemZISD::UDIVREM64,
Op.getOperand(0), Op.getOperand(1), Ops[1], Ops[0]);
- return DAG.getMergeValues(Ops, 2, DL);
+ return DAG.getMergeValues(Ops, DL);
}
SDValue SystemZTargetLowering::lowerOR(SDValue Op, SelectionDAG &DAG) const {
// high 32 bits and just masks out low bits. We can skip it if so.
if (HighOp.getOpcode() == ISD::AND &&
HighOp.getOperand(1).getOpcode() == ISD::Constant) {
- ConstantSDNode *MaskNode = cast<ConstantSDNode>(HighOp.getOperand(1));
- uint64_t Mask = MaskNode->getZExtValue() | Masks[High];
- if ((Mask >> 32) == 0xffffffff)
- HighOp = HighOp.getOperand(0);
+ SDValue HighOp0 = HighOp.getOperand(0);
+ uint64_t Mask = cast<ConstantSDNode>(HighOp.getOperand(1))->getZExtValue();
+ if (DAG.MaskedValueIsZero(HighOp0, APInt(64, ~(Mask | 0xffffffff))))
+ HighOp = HighOp0;
}
// Take advantage of the fact that all GR32 operations only change the
// can be folded.
SDLoc DL(Op);
SDValue Low32 = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, LowOp);
- SDValue SubReg32 = DAG.getTargetConstant(SystemZ::subreg_32bit, MVT::i64);
- SDNode *Result = DAG.getMachineNode(TargetOpcode::INSERT_SUBREG, DL,
- MVT::i64, HighOp, Low32, SubReg32);
- return SDValue(Result, 0);
+ return DAG.getTargetInsertSubreg(SystemZ::subreg_l32, DL,
+ MVT::i64, HighOp, Low32);
+}
+
+// Op is an atomic load. Lower it into a normal volatile load.
+SDValue SystemZTargetLowering::lowerATOMIC_LOAD(SDValue Op,
+ SelectionDAG &DAG) const {
+ auto *Node = cast<AtomicSDNode>(Op.getNode());
+ return DAG.getExtLoad(ISD::EXTLOAD, SDLoc(Op), Op.getValueType(),
+ Node->getChain(), Node->getBasePtr(),
+ Node->getMemoryVT(), Node->getMemOperand());
+}
+
+// Op is an atomic store. Lower it into a normal volatile store followed
+// by a serialization.
+SDValue SystemZTargetLowering::lowerATOMIC_STORE(SDValue Op,
+ SelectionDAG &DAG) const {
+ auto *Node = cast<AtomicSDNode>(Op.getNode());
+ SDValue Chain = DAG.getTruncStore(Node->getChain(), SDLoc(Op), Node->getVal(),
+ Node->getBasePtr(), Node->getMemoryVT(),
+ Node->getMemOperand());
+ return SDValue(DAG.getMachineNode(SystemZ::Serialize, SDLoc(Op), MVT::Other,
+ Chain), 0);
}
// Op is an 8-, 16-bit or 32-bit ATOMIC_LOAD_* operation. Lower the first
// two into the fullword ATOMIC_LOADW_* operation given by Opcode.
-SDValue SystemZTargetLowering::lowerATOMIC_LOAD(SDValue Op,
- SelectionDAG &DAG,
- unsigned Opcode) const {
- AtomicSDNode *Node = cast<AtomicSDNode>(Op.getNode());
+SDValue SystemZTargetLowering::lowerATOMIC_LOAD_OP(SDValue Op,
+ SelectionDAG &DAG,
+ unsigned Opcode) const {
+ auto *Node = cast<AtomicSDNode>(Op.getNode());
// 32-bit operations need no code outside the main loop.
EVT NarrowVT = Node->getMemoryVT();
// Convert atomic subtracts of constants into additions.
if (Opcode == SystemZISD::ATOMIC_LOADW_SUB)
- if (ConstantSDNode *Const = dyn_cast<ConstantSDNode>(Src2)) {
+ if (auto *Const = dyn_cast<ConstantSDNode>(Src2)) {
Opcode = SystemZISD::ATOMIC_LOADW_ADD;
Src2 = DAG.getConstant(-Const->getSExtValue(), Src2.getValueType());
}
SDValue Ops[] = { ChainIn, AlignedAddr, Src2, BitShift, NegBitShift,
DAG.getConstant(BitSize, WideVT) };
SDValue AtomicOp = DAG.getMemIntrinsicNode(Opcode, DL, VTList, Ops,
- array_lengthof(Ops),
NarrowVT, MMO);
// Rotate the result of the final CS so that the field is in the lower
SDValue Result = DAG.getNode(ISD::ROTL, DL, WideVT, AtomicOp, ResultShift);
SDValue RetOps[2] = { Result, AtomicOp.getValue(1) };
- return DAG.getMergeValues(RetOps, 2, DL);
+ return DAG.getMergeValues(RetOps, DL);
+}
+
+// Op is an ATOMIC_LOAD_SUB operation. Lower 8- and 16-bit operations
+// into ATOMIC_LOADW_SUBs and decide whether to convert 32- and 64-bit
+// operations into additions.
+SDValue SystemZTargetLowering::lowerATOMIC_LOAD_SUB(SDValue Op,
+ SelectionDAG &DAG) const {
+ auto *Node = cast<AtomicSDNode>(Op.getNode());
+ EVT MemVT = Node->getMemoryVT();
+ if (MemVT == MVT::i32 || MemVT == MVT::i64) {
+ // A full-width operation.
+ assert(Op.getValueType() == MemVT && "Mismatched VTs");
+ SDValue Src2 = Node->getVal();
+ SDValue NegSrc2;
+ SDLoc DL(Src2);
+
+ if (auto *Op2 = dyn_cast<ConstantSDNode>(Src2)) {
+ // Use an addition if the operand is constant and either LAA(G) is
+ // available or the negative value is in the range of A(G)FHI.
+ int64_t Value = (-Op2->getAPIntValue()).getSExtValue();
+ if (isInt<32>(Value) || TM.getSubtargetImpl()->hasInterlockedAccess1())
+ NegSrc2 = DAG.getConstant(Value, MemVT);
+ } else if (TM.getSubtargetImpl()->hasInterlockedAccess1())
+ // Use LAA(G) if available.
+ NegSrc2 = DAG.getNode(ISD::SUB, DL, MemVT, DAG.getConstant(0, MemVT),
+ Src2);
+
+ if (NegSrc2.getNode())
+ return DAG.getAtomic(ISD::ATOMIC_LOAD_ADD, DL, MemVT,
+ Node->getChain(), Node->getBasePtr(), NegSrc2,
+ Node->getMemOperand(), Node->getOrdering(),
+ Node->getSynchScope());
+
+ // Use the node as-is.
+ return Op;
+ }
+
+ return lowerATOMIC_LOAD_OP(Op, DAG, SystemZISD::ATOMIC_LOADW_SUB);
}
// Node is an 8- or 16-bit ATOMIC_CMP_SWAP operation. Lower the first two
// into a fullword ATOMIC_CMP_SWAPW operation.
SDValue SystemZTargetLowering::lowerATOMIC_CMP_SWAP(SDValue Op,
SelectionDAG &DAG) const {
- AtomicSDNode *Node = cast<AtomicSDNode>(Op.getNode());
+ auto *Node = cast<AtomicSDNode>(Op.getNode());
// We have native support for 32-bit compare and swap.
EVT NarrowVT = Node->getMemoryVT();
SDValue Ops[] = { ChainIn, AlignedAddr, CmpVal, SwapVal, BitShift,
NegBitShift, DAG.getConstant(BitSize, WideVT) };
SDValue AtomicOp = DAG.getMemIntrinsicNode(SystemZISD::ATOMIC_CMP_SWAPW, DL,
- VTList, Ops, array_lengthof(Ops),
- NarrowVT, MMO);
+ VTList, Ops, NarrowVT, MMO);
return AtomicOp;
}
SystemZ::R15D, Op.getOperand(1));
}
+SDValue SystemZTargetLowering::lowerPREFETCH(SDValue Op,
+ SelectionDAG &DAG) const {
+ bool IsData = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
+ if (!IsData)
+ // Just preserve the chain.
+ return Op.getOperand(0);
+
+ bool IsWrite = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue();
+ unsigned Code = IsWrite ? SystemZ::PFD_WRITE : SystemZ::PFD_READ;
+ auto *Node = cast<MemIntrinsicSDNode>(Op.getNode());
+ SDValue Ops[] = {
+ Op.getOperand(0),
+ DAG.getConstant(Code, MVT::i32),
+ Op.getOperand(1)
+ };
+ return DAG.getMemIntrinsicNode(SystemZISD::PREFETCH, SDLoc(Op),
+ Node->getVTList(), Ops,
+ Node->getMemoryVT(), Node->getMemOperand());
+}
+
SDValue SystemZTargetLowering::LowerOperation(SDValue Op,
SelectionDAG &DAG) const {
switch (Op.getOpcode()) {
return lowerBR_CC(Op, DAG);
case ISD::SELECT_CC:
return lowerSELECT_CC(Op, DAG);
+ case ISD::SETCC:
+ return lowerSETCC(Op, DAG);
case ISD::GlobalAddress:
return lowerGlobalAddress(cast<GlobalAddressSDNode>(Op), DAG);
case ISD::GlobalTLSAddress:
case ISD::OR:
return lowerOR(Op, DAG);
case ISD::ATOMIC_SWAP:
- return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_SWAPW);
+ return lowerATOMIC_LOAD_OP(Op, DAG, SystemZISD::ATOMIC_SWAPW);
+ case ISD::ATOMIC_STORE:
+ return lowerATOMIC_STORE(Op, DAG);
+ case ISD::ATOMIC_LOAD:
+ return lowerATOMIC_LOAD(Op, DAG);
case ISD::ATOMIC_LOAD_ADD:
- return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_ADD);
+ return lowerATOMIC_LOAD_OP(Op, DAG, SystemZISD::ATOMIC_LOADW_ADD);
case ISD::ATOMIC_LOAD_SUB:
- return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_SUB);
+ return lowerATOMIC_LOAD_SUB(Op, DAG);
case ISD::ATOMIC_LOAD_AND:
- return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_AND);
+ return lowerATOMIC_LOAD_OP(Op, DAG, SystemZISD::ATOMIC_LOADW_AND);
case ISD::ATOMIC_LOAD_OR:
- return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_OR);
+ return lowerATOMIC_LOAD_OP(Op, DAG, SystemZISD::ATOMIC_LOADW_OR);
case ISD::ATOMIC_LOAD_XOR:
- return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_XOR);
+ return lowerATOMIC_LOAD_OP(Op, DAG, SystemZISD::ATOMIC_LOADW_XOR);
case ISD::ATOMIC_LOAD_NAND:
- return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_NAND);
+ return lowerATOMIC_LOAD_OP(Op, DAG, SystemZISD::ATOMIC_LOADW_NAND);
case ISD::ATOMIC_LOAD_MIN:
- return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_MIN);
+ return lowerATOMIC_LOAD_OP(Op, DAG, SystemZISD::ATOMIC_LOADW_MIN);
case ISD::ATOMIC_LOAD_MAX:
- return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_MAX);
+ return lowerATOMIC_LOAD_OP(Op, DAG, SystemZISD::ATOMIC_LOADW_MAX);
case ISD::ATOMIC_LOAD_UMIN:
- return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_UMIN);
+ return lowerATOMIC_LOAD_OP(Op, DAG, SystemZISD::ATOMIC_LOADW_UMIN);
case ISD::ATOMIC_LOAD_UMAX:
- return lowerATOMIC_LOAD(Op, DAG, SystemZISD::ATOMIC_LOADW_UMAX);
+ return lowerATOMIC_LOAD_OP(Op, DAG, SystemZISD::ATOMIC_LOADW_UMAX);
case ISD::ATOMIC_CMP_SWAP:
return lowerATOMIC_CMP_SWAP(Op, DAG);
case ISD::STACKSAVE:
return lowerSTACKSAVE(Op, DAG);
case ISD::STACKRESTORE:
return lowerSTACKRESTORE(Op, DAG);
+ case ISD::PREFETCH:
+ return lowerPREFETCH(Op, DAG);
default:
llvm_unreachable("Unexpected node to lower");
}
OPCODE(CALL);
OPCODE(SIBCALL);
OPCODE(PCREL_WRAPPER);
- OPCODE(CMP);
- OPCODE(UCMP);
+ OPCODE(PCREL_OFFSET);
+ OPCODE(IABS);
+ OPCODE(ICMP);
+ OPCODE(FCMP);
+ OPCODE(TM);
OPCODE(BR_CCMASK);
OPCODE(SELECT_CCMASK);
OPCODE(ADJDYNALLOC);
OPCODE(UDIVREM32);
OPCODE(UDIVREM64);
OPCODE(MVC);
+ OPCODE(MVC_LOOP);
+ OPCODE(NC);
+ OPCODE(NC_LOOP);
+ OPCODE(OC);
+ OPCODE(OC_LOOP);
+ OPCODE(XC);
+ OPCODE(XC_LOOP);
OPCODE(CLC);
+ OPCODE(CLC_LOOP);
OPCODE(STRCMP);
OPCODE(STPCPY);
OPCODE(SEARCH_STRING);
OPCODE(IPM);
+ OPCODE(SERIALIZE);
OPCODE(ATOMIC_SWAPW);
OPCODE(ATOMIC_LOADW_ADD);
OPCODE(ATOMIC_LOADW_SUB);
OPCODE(ATOMIC_LOADW_UMIN);
OPCODE(ATOMIC_LOADW_UMAX);
OPCODE(ATOMIC_CMP_SWAPW);
+ OPCODE(PREFETCH);
}
- return NULL;
+ return nullptr;
#undef OPCODE
}
+SDValue SystemZTargetLowering::PerformDAGCombine(SDNode *N,
+ DAGCombinerInfo &DCI) const {
+ SelectionDAG &DAG = DCI.DAG;
+ unsigned Opcode = N->getOpcode();
+ if (Opcode == ISD::SIGN_EXTEND) {
+ // Convert (sext (ashr (shl X, C1), C2)) to
+ // (ashr (shl (anyext X), C1'), C2')), since wider shifts are as
+ // cheap as narrower ones.
+ SDValue N0 = N->getOperand(0);
+ EVT VT = N->getValueType(0);
+ if (N0.hasOneUse() && N0.getOpcode() == ISD::SRA) {
+ auto *SraAmt = dyn_cast<ConstantSDNode>(N0.getOperand(1));
+ SDValue Inner = N0.getOperand(0);
+ if (SraAmt && Inner.hasOneUse() && Inner.getOpcode() == ISD::SHL) {
+ if (auto *ShlAmt = dyn_cast<ConstantSDNode>(Inner.getOperand(1))) {
+ unsigned Extra = (VT.getSizeInBits() -
+ N0.getValueType().getSizeInBits());
+ unsigned NewShlAmt = ShlAmt->getZExtValue() + Extra;
+ unsigned NewSraAmt = SraAmt->getZExtValue() + Extra;
+ EVT ShiftVT = N0.getOperand(1).getValueType();
+ SDValue Ext = DAG.getNode(ISD::ANY_EXTEND, SDLoc(Inner), VT,
+ Inner.getOperand(0));
+ SDValue Shl = DAG.getNode(ISD::SHL, SDLoc(Inner), VT, Ext,
+ DAG.getConstant(NewShlAmt, ShiftVT));
+ return DAG.getNode(ISD::SRA, SDLoc(N0), VT, Shl,
+ DAG.getConstant(NewSraAmt, ShiftVT));
+ }
+ }
+ }
+ }
+ return SDValue();
+}
+
//===----------------------------------------------------------------------===//
// Custom insertion
//===----------------------------------------------------------------------===//
static MachineBasicBlock *emitBlockAfter(MachineBasicBlock *MBB) {
MachineFunction &MF = *MBB->getParent();
MachineBasicBlock *NewMBB = MF.CreateMachineBasicBlock(MBB->getBasicBlock());
- MF.insert(llvm::next(MachineFunction::iterator(MBB)), NewMBB);
+ MF.insert(std::next(MachineFunction::iterator(MBB)), NewMBB);
return NewMBB;
}
MachineBasicBlock *MBB) {
MachineBasicBlock *NewMBB = emitBlockAfter(MBB);
NewMBB->splice(NewMBB->begin(), MBB,
- llvm::next(MachineBasicBlock::iterator(MI)),
- MBB->end());
+ std::next(MachineBasicBlock::iterator(MI)), MBB->end());
NewMBB->transferSuccessorsAndUpdatePHIs(MBB);
return NewMBB;
}
+// Split MBB before MI and return the new block (the one that contains MI).
+static MachineBasicBlock *splitBlockBefore(MachineInstr *MI,
+ MachineBasicBlock *MBB) {
+ MachineBasicBlock *NewMBB = emitBlockAfter(MBB);
+ NewMBB->splice(NewMBB->begin(), MBB, MI, MBB->end());
+ NewMBB->transferSuccessorsAndUpdatePHIs(MBB);
+ return NewMBB;
+}
+
+// Force base value Base into a register before MI. Return the register.
+static unsigned forceReg(MachineInstr *MI, MachineOperand &Base,
+ const SystemZInstrInfo *TII) {
+ if (Base.isReg())
+ return Base.getReg();
+
+ MachineBasicBlock *MBB = MI->getParent();
+ MachineFunction &MF = *MBB->getParent();
+ MachineRegisterInfo &MRI = MF.getRegInfo();
+
+ unsigned Reg = MRI.createVirtualRegister(&SystemZ::ADDR64BitRegClass);
+ BuildMI(*MBB, MI, MI->getDebugLoc(), TII->get(SystemZ::LA), Reg)
+ .addOperand(Base).addImm(0).addReg(0);
+ return Reg;
+}
+
// Implement EmitInstrWithCustomInserter for pseudo Select* instruction MI.
MachineBasicBlock *
SystemZTargetLowering::emitSelect(MachineInstr *MI,
DebugLoc DL = MI->getDebugLoc();
MachineBasicBlock *StartMBB = MBB;
- MachineBasicBlock *JoinMBB = splitBlockAfter(MI, MBB);
+ MachineBasicBlock *JoinMBB = splitBlockBefore(MI, MBB);
MachineBasicBlock *FalseMBB = emitBlockAfter(StartMBB);
// StartMBB:
// %Result = phi [ %FalseReg, FalseMBB ], [ %TrueReg, StartMBB ]
// ...
MBB = JoinMBB;
- BuildMI(*MBB, MBB->begin(), DL, TII->get(SystemZ::PHI), DestReg)
+ BuildMI(*MBB, MI, DL, TII->get(SystemZ::PHI), DestReg)
.addReg(TrueReg).addMBB(StartMBB)
.addReg(FalseReg).addMBB(FalseMBB);
CCMask ^= CCValid;
MachineBasicBlock *StartMBB = MBB;
- MachineBasicBlock *JoinMBB = splitBlockAfter(MI, MBB);
+ MachineBasicBlock *JoinMBB = splitBlockBefore(MI, MBB);
MachineBasicBlock *FalseMBB = emitBlockAfter(StartMBB);
// StartMBB:
// Insert a basic block for the main loop.
MachineBasicBlock *StartMBB = MBB;
- MachineBasicBlock *DoneMBB = splitBlockAfter(MI, MBB);
+ MachineBasicBlock *DoneMBB = splitBlockBefore(MI, MBB);
MachineBasicBlock *LoopMBB = emitBlockAfter(StartMBB);
// StartMBB:
.addReg(RotatedOldVal).addOperand(Src2);
if (BitSize < 32)
// XILF with the upper BitSize bits set.
- BuildMI(MBB, DL, TII->get(SystemZ::XILF32), RotatedNewVal)
+ BuildMI(MBB, DL, TII->get(SystemZ::XILF), RotatedNewVal)
.addReg(Tmp).addImm(uint32_t(~0 << (32 - BitSize)));
else if (BitSize == 32)
// XILF with every bit set.
- BuildMI(MBB, DL, TII->get(SystemZ::XILF32), RotatedNewVal)
+ BuildMI(MBB, DL, TII->get(SystemZ::XILF), RotatedNewVal)
.addReg(Tmp).addImm(~uint32_t(0));
else {
// Use LCGR and add -1 to the result, which is more compact than
// Insert 3 basic blocks for the loop.
MachineBasicBlock *StartMBB = MBB;
- MachineBasicBlock *DoneMBB = splitBlockAfter(MI, MBB);
+ MachineBasicBlock *DoneMBB = splitBlockBefore(MI, MBB);
MachineBasicBlock *LoopMBB = emitBlockAfter(StartMBB);
MachineBasicBlock *UseAltMBB = emitBlockAfter(LoopMBB);
MachineBasicBlock *UpdateMBB = emitBlockAfter(UseAltMBB);
// Insert 2 basic blocks for the loop.
MachineBasicBlock *StartMBB = MBB;
- MachineBasicBlock *DoneMBB = splitBlockAfter(MI, MBB);
+ MachineBasicBlock *DoneMBB = splitBlockBefore(MI, MBB);
MachineBasicBlock *LoopMBB = emitBlockAfter(StartMBB);
MachineBasicBlock *SetMBB = emitBlockAfter(LoopMBB);
// Emit an extension from a GR32 or GR64 to a GR128. ClearEven is true
// if the high register of the GR128 value must be cleared or false if
-// it's "don't care". SubReg is subreg_odd32 when extending a GR32
-// and subreg_odd when extending a GR64.
+// it's "don't care". SubReg is subreg_l32 when extending a GR32
+// and subreg_l64 when extending a GR64.
MachineBasicBlock *
SystemZTargetLowering::emitExt128(MachineInstr *MI,
MachineBasicBlock *MBB,
BuildMI(*MBB, MI, DL, TII->get(SystemZ::LLILL), Zero64)
.addImm(0);
BuildMI(*MBB, MI, DL, TII->get(TargetOpcode::INSERT_SUBREG), NewIn128)
- .addReg(In128).addReg(Zero64).addImm(SystemZ::subreg_high);
+ .addReg(In128).addReg(Zero64).addImm(SystemZ::subreg_h64);
In128 = NewIn128;
}
BuildMI(*MBB, MI, DL, TII->get(TargetOpcode::INSERT_SUBREG), Dest)
MachineBasicBlock *MBB,
unsigned Opcode) const {
const SystemZInstrInfo *TII = TM.getInstrInfo();
+ MachineFunction &MF = *MBB->getParent();
+ MachineRegisterInfo &MRI = MF.getRegInfo();
DebugLoc DL = MI->getDebugLoc();
- MachineOperand DestBase = MI->getOperand(0);
+ MachineOperand DestBase = earlyUseOperand(MI->getOperand(0));
uint64_t DestDisp = MI->getOperand(1).getImm();
- MachineOperand SrcBase = MI->getOperand(2);
+ MachineOperand SrcBase = earlyUseOperand(MI->getOperand(2));
uint64_t SrcDisp = MI->getOperand(3).getImm();
uint64_t Length = MI->getOperand(4).getImm();
- BuildMI(*MBB, MI, DL, TII->get(Opcode))
- .addOperand(DestBase).addImm(DestDisp).addImm(Length)
- .addOperand(SrcBase).addImm(SrcDisp);
+ // When generating more than one CLC, all but the last will need to
+ // branch to the end when a difference is found.
+ MachineBasicBlock *EndMBB = (Length > 256 && Opcode == SystemZ::CLC ?
+ splitBlockAfter(MI, MBB) : nullptr);
+
+ // Check for the loop form, in which operand 5 is the trip count.
+ if (MI->getNumExplicitOperands() > 5) {
+ bool HaveSingleBase = DestBase.isIdenticalTo(SrcBase);
+
+ uint64_t StartCountReg = MI->getOperand(5).getReg();
+ uint64_t StartSrcReg = forceReg(MI, SrcBase, TII);
+ uint64_t StartDestReg = (HaveSingleBase ? StartSrcReg :
+ forceReg(MI, DestBase, TII));
+
+ const TargetRegisterClass *RC = &SystemZ::ADDR64BitRegClass;
+ uint64_t ThisSrcReg = MRI.createVirtualRegister(RC);
+ uint64_t ThisDestReg = (HaveSingleBase ? ThisSrcReg :
+ MRI.createVirtualRegister(RC));
+ uint64_t NextSrcReg = MRI.createVirtualRegister(RC);
+ uint64_t NextDestReg = (HaveSingleBase ? NextSrcReg :
+ MRI.createVirtualRegister(RC));
+
+ RC = &SystemZ::GR64BitRegClass;
+ uint64_t ThisCountReg = MRI.createVirtualRegister(RC);
+ uint64_t NextCountReg = MRI.createVirtualRegister(RC);
+
+ MachineBasicBlock *StartMBB = MBB;
+ MachineBasicBlock *DoneMBB = splitBlockBefore(MI, MBB);
+ MachineBasicBlock *LoopMBB = emitBlockAfter(StartMBB);
+ MachineBasicBlock *NextMBB = (EndMBB ? emitBlockAfter(LoopMBB) : LoopMBB);
+
+ // StartMBB:
+ // # fall through to LoopMMB
+ MBB->addSuccessor(LoopMBB);
+
+ // LoopMBB:
+ // %ThisDestReg = phi [ %StartDestReg, StartMBB ],
+ // [ %NextDestReg, NextMBB ]
+ // %ThisSrcReg = phi [ %StartSrcReg, StartMBB ],
+ // [ %NextSrcReg, NextMBB ]
+ // %ThisCountReg = phi [ %StartCountReg, StartMBB ],
+ // [ %NextCountReg, NextMBB ]
+ // ( PFD 2, 768+DestDisp(%ThisDestReg) )
+ // Opcode DestDisp(256,%ThisDestReg), SrcDisp(%ThisSrcReg)
+ // ( JLH EndMBB )
+ //
+ // The prefetch is used only for MVC. The JLH is used only for CLC.
+ MBB = LoopMBB;
+
+ BuildMI(MBB, DL, TII->get(SystemZ::PHI), ThisDestReg)
+ .addReg(StartDestReg).addMBB(StartMBB)
+ .addReg(NextDestReg).addMBB(NextMBB);
+ if (!HaveSingleBase)
+ BuildMI(MBB, DL, TII->get(SystemZ::PHI), ThisSrcReg)
+ .addReg(StartSrcReg).addMBB(StartMBB)
+ .addReg(NextSrcReg).addMBB(NextMBB);
+ BuildMI(MBB, DL, TII->get(SystemZ::PHI), ThisCountReg)
+ .addReg(StartCountReg).addMBB(StartMBB)
+ .addReg(NextCountReg).addMBB(NextMBB);
+ if (Opcode == SystemZ::MVC)
+ BuildMI(MBB, DL, TII->get(SystemZ::PFD))
+ .addImm(SystemZ::PFD_WRITE)
+ .addReg(ThisDestReg).addImm(DestDisp + 768).addReg(0);
+ BuildMI(MBB, DL, TII->get(Opcode))
+ .addReg(ThisDestReg).addImm(DestDisp).addImm(256)
+ .addReg(ThisSrcReg).addImm(SrcDisp);
+ if (EndMBB) {
+ BuildMI(MBB, DL, TII->get(SystemZ::BRC))
+ .addImm(SystemZ::CCMASK_ICMP).addImm(SystemZ::CCMASK_CMP_NE)
+ .addMBB(EndMBB);
+ MBB->addSuccessor(EndMBB);
+ MBB->addSuccessor(NextMBB);
+ }
+
+ // NextMBB:
+ // %NextDestReg = LA 256(%ThisDestReg)
+ // %NextSrcReg = LA 256(%ThisSrcReg)
+ // %NextCountReg = AGHI %ThisCountReg, -1
+ // CGHI %NextCountReg, 0
+ // JLH LoopMBB
+ // # fall through to DoneMMB
+ //
+ // The AGHI, CGHI and JLH should be converted to BRCTG by later passes.
+ MBB = NextMBB;
+
+ BuildMI(MBB, DL, TII->get(SystemZ::LA), NextDestReg)
+ .addReg(ThisDestReg).addImm(256).addReg(0);
+ if (!HaveSingleBase)
+ BuildMI(MBB, DL, TII->get(SystemZ::LA), NextSrcReg)
+ .addReg(ThisSrcReg).addImm(256).addReg(0);
+ BuildMI(MBB, DL, TII->get(SystemZ::AGHI), NextCountReg)
+ .addReg(ThisCountReg).addImm(-1);
+ BuildMI(MBB, DL, TII->get(SystemZ::CGHI))
+ .addReg(NextCountReg).addImm(0);
+ BuildMI(MBB, DL, TII->get(SystemZ::BRC))
+ .addImm(SystemZ::CCMASK_ICMP).addImm(SystemZ::CCMASK_CMP_NE)
+ .addMBB(LoopMBB);
+ MBB->addSuccessor(LoopMBB);
+ MBB->addSuccessor(DoneMBB);
+
+ DestBase = MachineOperand::CreateReg(NextDestReg, false);
+ SrcBase = MachineOperand::CreateReg(NextSrcReg, false);
+ Length &= 255;
+ MBB = DoneMBB;
+ }
+ // Handle any remaining bytes with straight-line code.
+ while (Length > 0) {
+ uint64_t ThisLength = std::min(Length, uint64_t(256));
+ // The previous iteration might have created out-of-range displacements.
+ // Apply them using LAY if so.
+ if (!isUInt<12>(DestDisp)) {
+ unsigned Reg = MRI.createVirtualRegister(&SystemZ::ADDR64BitRegClass);
+ BuildMI(*MBB, MI, MI->getDebugLoc(), TII->get(SystemZ::LAY), Reg)
+ .addOperand(DestBase).addImm(DestDisp).addReg(0);
+ DestBase = MachineOperand::CreateReg(Reg, false);
+ DestDisp = 0;
+ }
+ if (!isUInt<12>(SrcDisp)) {
+ unsigned Reg = MRI.createVirtualRegister(&SystemZ::ADDR64BitRegClass);
+ BuildMI(*MBB, MI, MI->getDebugLoc(), TII->get(SystemZ::LAY), Reg)
+ .addOperand(SrcBase).addImm(SrcDisp).addReg(0);
+ SrcBase = MachineOperand::CreateReg(Reg, false);
+ SrcDisp = 0;
+ }
+ BuildMI(*MBB, MI, DL, TII->get(Opcode))
+ .addOperand(DestBase).addImm(DestDisp).addImm(ThisLength)
+ .addOperand(SrcBase).addImm(SrcDisp);
+ DestDisp += ThisLength;
+ SrcDisp += ThisLength;
+ Length -= ThisLength;
+ // If there's another CLC to go, branch to the end if a difference
+ // was found.
+ if (EndMBB && Length > 0) {
+ MachineBasicBlock *NextMBB = splitBlockBefore(MI, MBB);
+ BuildMI(MBB, DL, TII->get(SystemZ::BRC))
+ .addImm(SystemZ::CCMASK_ICMP).addImm(SystemZ::CCMASK_CMP_NE)
+ .addMBB(EndMBB);
+ MBB->addSuccessor(EndMBB);
+ MBB->addSuccessor(NextMBB);
+ MBB = NextMBB;
+ }
+ }
+ if (EndMBB) {
+ MBB->addSuccessor(EndMBB);
+ MBB = EndMBB;
+ MBB->addLiveIn(SystemZ::CC);
+ }
MI->eraseFromParent();
return MBB;
uint64_t End2Reg = MRI.createVirtualRegister(RC);
MachineBasicBlock *StartMBB = MBB;
- MachineBasicBlock *DoneMBB = splitBlockAfter(MI, MBB);
+ MachineBasicBlock *DoneMBB = splitBlockBefore(MI, MBB);
MachineBasicBlock *LoopMBB = emitBlockAfter(StartMBB);
// StartMBB:
// LoopMBB:
// %This1Reg = phi [ %Start1Reg, StartMBB ], [ %End1Reg, LoopMBB ]
// %This2Reg = phi [ %Start2Reg, StartMBB ], [ %End2Reg, LoopMBB ]
- // R0W = %CharReg
- // %End1Reg, %End2Reg = CLST %This1Reg, %This2Reg -- uses R0W
+ // R0L = %CharReg
+ // %End1Reg, %End2Reg = CLST %This1Reg, %This2Reg -- uses R0L
// JO LoopMBB
// # fall through to DoneMMB
//
- // The load of R0W can be hoisted by post-RA LICM.
+ // The load of R0L can be hoisted by post-RA LICM.
MBB = LoopMBB;
BuildMI(MBB, DL, TII->get(SystemZ::PHI), This1Reg)
BuildMI(MBB, DL, TII->get(SystemZ::PHI), This2Reg)
.addReg(Start2Reg).addMBB(StartMBB)
.addReg(End2Reg).addMBB(LoopMBB);
- BuildMI(MBB, DL, TII->get(TargetOpcode::COPY), SystemZ::R0W).addReg(CharReg);
+ BuildMI(MBB, DL, TII->get(TargetOpcode::COPY), SystemZ::R0L).addReg(CharReg);
BuildMI(MBB, DL, TII->get(Opcode))
.addReg(End1Reg, RegState::Define).addReg(End2Reg, RegState::Define)
.addReg(This1Reg).addReg(This2Reg);
MachineBasicBlock *SystemZTargetLowering::
EmitInstrWithCustomInserter(MachineInstr *MI, MachineBasicBlock *MBB) const {
switch (MI->getOpcode()) {
+ case SystemZ::Select32Mux:
case SystemZ::Select32:
case SystemZ::SelectF32:
case SystemZ::Select64:
case SystemZ::SelectF128:
return emitSelect(MI, MBB);
- case SystemZ::CondStore8_32:
- return emitCondStore(MI, MBB, SystemZ::STC32, 0, false);
- case SystemZ::CondStore8_32Inv:
- return emitCondStore(MI, MBB, SystemZ::STC32, 0, true);
- case SystemZ::CondStore16_32:
- return emitCondStore(MI, MBB, SystemZ::STH32, 0, false);
- case SystemZ::CondStore16_32Inv:
- return emitCondStore(MI, MBB, SystemZ::STH32, 0, true);
- case SystemZ::CondStore32_32:
- return emitCondStore(MI, MBB, SystemZ::ST32, SystemZ::STOC32, false);
- case SystemZ::CondStore32_32Inv:
- return emitCondStore(MI, MBB, SystemZ::ST32, SystemZ::STOC32, true);
+ case SystemZ::CondStore8Mux:
+ return emitCondStore(MI, MBB, SystemZ::STCMux, 0, false);
+ case SystemZ::CondStore8MuxInv:
+ return emitCondStore(MI, MBB, SystemZ::STCMux, 0, true);
+ case SystemZ::CondStore16Mux:
+ return emitCondStore(MI, MBB, SystemZ::STHMux, 0, false);
+ case SystemZ::CondStore16MuxInv:
+ return emitCondStore(MI, MBB, SystemZ::STHMux, 0, true);
case SystemZ::CondStore8:
return emitCondStore(MI, MBB, SystemZ::STC, 0, false);
case SystemZ::CondStore8Inv:
return emitCondStore(MI, MBB, SystemZ::STD, 0, true);
case SystemZ::AEXT128_64:
- return emitExt128(MI, MBB, false, SystemZ::subreg_low);
+ return emitExt128(MI, MBB, false, SystemZ::subreg_l64);
case SystemZ::ZEXT128_32:
- return emitExt128(MI, MBB, true, SystemZ::subreg_low32);
+ return emitExt128(MI, MBB, true, SystemZ::subreg_l32);
case SystemZ::ZEXT128_64:
- return emitExt128(MI, MBB, true, SystemZ::subreg_low);
+ return emitExt128(MI, MBB, true, SystemZ::subreg_l64);
case SystemZ::ATOMIC_SWAPW:
return emitAtomicLoadBinary(MI, MBB, 0, 0);
case SystemZ::ATOMIC_LOADW_NR:
return emitAtomicLoadBinary(MI, MBB, SystemZ::NR, 0);
case SystemZ::ATOMIC_LOADW_NILH:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH32, 0);
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH, 0);
case SystemZ::ATOMIC_LOAD_NR:
return emitAtomicLoadBinary(MI, MBB, SystemZ::NR, 32);
- case SystemZ::ATOMIC_LOAD_NILL32:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NILL32, 32);
- case SystemZ::ATOMIC_LOAD_NILH32:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH32, 32);
- case SystemZ::ATOMIC_LOAD_NILF32:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NILF32, 32);
- case SystemZ::ATOMIC_LOAD_NGR:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NGR, 64);
case SystemZ::ATOMIC_LOAD_NILL:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NILL, 64);
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NILL, 32);
case SystemZ::ATOMIC_LOAD_NILH:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH, 64);
- case SystemZ::ATOMIC_LOAD_NIHL:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHL, 64);
- case SystemZ::ATOMIC_LOAD_NIHH:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHH, 64);
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH, 32);
case SystemZ::ATOMIC_LOAD_NILF:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NILF, 64);
- case SystemZ::ATOMIC_LOAD_NIHF:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHF, 64);
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NILF, 32);
+ case SystemZ::ATOMIC_LOAD_NGR:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NGR, 64);
+ case SystemZ::ATOMIC_LOAD_NILL64:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NILL64, 64);
+ case SystemZ::ATOMIC_LOAD_NILH64:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH64, 64);
+ case SystemZ::ATOMIC_LOAD_NIHL64:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHL64, 64);
+ case SystemZ::ATOMIC_LOAD_NIHH64:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHH64, 64);
+ case SystemZ::ATOMIC_LOAD_NILF64:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NILF64, 64);
+ case SystemZ::ATOMIC_LOAD_NIHF64:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHF64, 64);
case SystemZ::ATOMIC_LOADW_OR:
return emitAtomicLoadBinary(MI, MBB, SystemZ::OR, 0);
case SystemZ::ATOMIC_LOADW_OILH:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::OILH32, 0);
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::OILH, 0);
case SystemZ::ATOMIC_LOAD_OR:
return emitAtomicLoadBinary(MI, MBB, SystemZ::OR, 32);
- case SystemZ::ATOMIC_LOAD_OILL32:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::OILL32, 32);
- case SystemZ::ATOMIC_LOAD_OILH32:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::OILH32, 32);
- case SystemZ::ATOMIC_LOAD_OILF32:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::OILF32, 32);
- case SystemZ::ATOMIC_LOAD_OGR:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::OGR, 64);
case SystemZ::ATOMIC_LOAD_OILL:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::OILL, 64);
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::OILL, 32);
case SystemZ::ATOMIC_LOAD_OILH:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::OILH, 64);
- case SystemZ::ATOMIC_LOAD_OIHL:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::OIHL, 64);
- case SystemZ::ATOMIC_LOAD_OIHH:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::OIHH, 64);
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::OILH, 32);
case SystemZ::ATOMIC_LOAD_OILF:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::OILF, 64);
- case SystemZ::ATOMIC_LOAD_OIHF:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::OIHF, 64);
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::OILF, 32);
+ case SystemZ::ATOMIC_LOAD_OGR:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::OGR, 64);
+ case SystemZ::ATOMIC_LOAD_OILL64:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::OILL64, 64);
+ case SystemZ::ATOMIC_LOAD_OILH64:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::OILH64, 64);
+ case SystemZ::ATOMIC_LOAD_OIHL64:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::OIHL64, 64);
+ case SystemZ::ATOMIC_LOAD_OIHH64:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::OIHH64, 64);
+ case SystemZ::ATOMIC_LOAD_OILF64:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::OILF64, 64);
+ case SystemZ::ATOMIC_LOAD_OIHF64:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::OIHF64, 64);
case SystemZ::ATOMIC_LOADW_XR:
return emitAtomicLoadBinary(MI, MBB, SystemZ::XR, 0);
case SystemZ::ATOMIC_LOADW_XILF:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::XILF32, 0);
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::XILF, 0);
case SystemZ::ATOMIC_LOAD_XR:
return emitAtomicLoadBinary(MI, MBB, SystemZ::XR, 32);
- case SystemZ::ATOMIC_LOAD_XILF32:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::XILF32, 32);
+ case SystemZ::ATOMIC_LOAD_XILF:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::XILF, 32);
case SystemZ::ATOMIC_LOAD_XGR:
return emitAtomicLoadBinary(MI, MBB, SystemZ::XGR, 64);
- case SystemZ::ATOMIC_LOAD_XILF:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::XILF, 64);
- case SystemZ::ATOMIC_LOAD_XIHF:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::XIHF, 64);
+ case SystemZ::ATOMIC_LOAD_XILF64:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::XILF64, 64);
+ case SystemZ::ATOMIC_LOAD_XIHF64:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::XIHF64, 64);
case SystemZ::ATOMIC_LOADW_NRi:
return emitAtomicLoadBinary(MI, MBB, SystemZ::NR, 0, true);
case SystemZ::ATOMIC_LOADW_NILHi:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH32, 0, true);
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH, 0, true);
case SystemZ::ATOMIC_LOAD_NRi:
return emitAtomicLoadBinary(MI, MBB, SystemZ::NR, 32, true);
- case SystemZ::ATOMIC_LOAD_NILL32i:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NILL32, 32, true);
- case SystemZ::ATOMIC_LOAD_NILH32i:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH32, 32, true);
- case SystemZ::ATOMIC_LOAD_NILF32i:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NILF32, 32, true);
- case SystemZ::ATOMIC_LOAD_NGRi:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NGR, 64, true);
case SystemZ::ATOMIC_LOAD_NILLi:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NILL, 64, true);
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NILL, 32, true);
case SystemZ::ATOMIC_LOAD_NILHi:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH, 64, true);
- case SystemZ::ATOMIC_LOAD_NIHLi:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHL, 64, true);
- case SystemZ::ATOMIC_LOAD_NIHHi:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHH, 64, true);
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH, 32, true);
case SystemZ::ATOMIC_LOAD_NILFi:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NILF, 64, true);
- case SystemZ::ATOMIC_LOAD_NIHFi:
- return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHF, 64, true);
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NILF, 32, true);
+ case SystemZ::ATOMIC_LOAD_NGRi:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NGR, 64, true);
+ case SystemZ::ATOMIC_LOAD_NILL64i:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NILL64, 64, true);
+ case SystemZ::ATOMIC_LOAD_NILH64i:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NILH64, 64, true);
+ case SystemZ::ATOMIC_LOAD_NIHL64i:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHL64, 64, true);
+ case SystemZ::ATOMIC_LOAD_NIHH64i:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHH64, 64, true);
+ case SystemZ::ATOMIC_LOAD_NILF64i:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NILF64, 64, true);
+ case SystemZ::ATOMIC_LOAD_NIHF64i:
+ return emitAtomicLoadBinary(MI, MBB, SystemZ::NIHF64, 64, true);
case SystemZ::ATOMIC_LOADW_MIN:
return emitAtomicLoadMinMax(MI, MBB, SystemZ::CR,
case SystemZ::ATOMIC_CMP_SWAPW:
return emitAtomicCmpSwapW(MI, MBB);
- case SystemZ::MVCWrapper:
+ case SystemZ::MVCSequence:
+ case SystemZ::MVCLoop:
return emitMemMemWrapper(MI, MBB, SystemZ::MVC);
- case SystemZ::CLCWrapper:
+ case SystemZ::NCSequence:
+ case SystemZ::NCLoop:
+ return emitMemMemWrapper(MI, MBB, SystemZ::NC);
+ case SystemZ::OCSequence:
+ case SystemZ::OCLoop:
+ return emitMemMemWrapper(MI, MBB, SystemZ::OC);
+ case SystemZ::XCSequence:
+ case SystemZ::XCLoop:
+ return emitMemMemWrapper(MI, MBB, SystemZ::XC);
+ case SystemZ::CLCSequence:
+ case SystemZ::CLCLoop:
return emitMemMemWrapper(MI, MBB, SystemZ::CLC);
case SystemZ::CLSTLoop:
return emitStringWrapper(MI, MBB, SystemZ::CLST);