#include "llvm/CodeGen/SelectionDAGISel.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/ADT/Statistic.h"
+#include "llvm/Constants.h"
#include "llvm/GlobalValue.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
using namespace llvm;
namespace {
- Statistic<> Recorded("ppc-codegen", "Number of recording ops emitted");
Statistic<> FusedFP ("ppc-codegen", "Number of fused fp operations");
Statistic<> FrameOff("ppc-codegen", "Number of frame idx offsets collapsed");
/// getGlobalBaseReg - insert code into the entry mbb to materialize the PIC
/// base register. Return the virtual register that holds this value.
- unsigned getGlobalBaseReg();
+ SDOperand getGlobalBaseReg();
// Select - Convert the specified operand from a target-independent to a
// target-specific node if it hasn't already been changed.
bool Negate = false);
SDNode *SelectBitfieldInsert(SDNode *N);
+ /// SelectCC - Select a comparison of the specified values with the
+ /// specified condition code, returning the CR# of the expression.
+ SDOperand SelectCC(SDOperand LHS, SDOperand RHS, ISD::CondCode CC);
+
+ /// SelectAddr - Given the specified address, return the two operands for a
+ /// load/store instruction, and return true if it should be an indexed [r+r]
+ /// operation.
+ bool SelectAddr(SDOperand Addr, SDOperand &Op1, SDOperand &Op2);
+
+ SDOperand BuildSDIVSequence(SDNode *N);
+ SDOperand BuildUDIVSequence(SDNode *N);
+
/// InstructionSelectBasicBlock - This callback is invoked by
/// SelectionDAGISel when it has created a SelectionDAG for us to codegen.
- virtual void InstructionSelectBasicBlock(SelectionDAG &DAG) {
- DEBUG(BB->dump());
- // Select target instructions for the DAG.
- Select(DAG.getRoot());
- DAG.RemoveDeadNodes();
-
- // Emit machine code to BB.
- ScheduleAndEmitDAG(DAG);
- }
-
+ virtual void InstructionSelectBasicBlock(SelectionDAG &DAG);
+
virtual const char *getPassName() const {
return "PowerPC DAG->DAG Pattern Instruction Selection";
}
+
+// Include the pieces autogenerated from the target description.
+#include "PPC32GenDAGISel.inc"
+
+private:
+ SDOperand SelectDYNAMIC_STACKALLOC(SDOperand Op);
+ SDOperand SelectADD_PARTS(SDOperand Op);
+ SDOperand SelectSUB_PARTS(SDOperand Op);
+ SDOperand SelectSETCC(SDOperand Op);
+ SDOperand SelectCALL(SDOperand Op);
};
}
+/// InstructionSelectBasicBlock - This callback is invoked by
+/// SelectionDAGISel when it has created a SelectionDAG for us to codegen.
+void PPC32DAGToDAGISel::InstructionSelectBasicBlock(SelectionDAG &DAG) {
+ DEBUG(BB->dump());
+
+ // The selection process is inherently a bottom-up recursive process (users
+ // select their uses before themselves). Given infinite stack space, we
+ // could just start selecting on the root and traverse the whole graph. In
+ // practice however, this causes us to run out of stack space on large basic
+ // blocks. To avoid this problem, select the entry node, then all its uses,
+ // iteratively instead of recursively.
+ std::vector<SDOperand> Worklist;
+ Worklist.push_back(DAG.getEntryNode());
+
+ // Note that we can do this in the PPC target (scanning forward across token
+ // chain edges) because no nodes ever get folded across these edges. On a
+ // target like X86 which supports load/modify/store operations, this would
+ // have to be more careful.
+ while (!Worklist.empty()) {
+ SDOperand Node = Worklist.back();
+ Worklist.pop_back();
+
+ // Chose from the least deep of the top two nodes.
+ if (!Worklist.empty() &&
+ Worklist.back().Val->getNodeDepth() < Node.Val->getNodeDepth())
+ std::swap(Worklist.back(), Node);
+
+ if ((Node.Val->getOpcode() >= ISD::BUILTIN_OP_END &&
+ Node.Val->getOpcode() < PPCISD::FIRST_NUMBER) ||
+ CodeGenMap.count(Node)) continue;
+
+ for (SDNode::use_iterator UI = Node.Val->use_begin(),
+ E = Node.Val->use_end(); UI != E; ++UI) {
+ // Scan the values. If this use has a value that is a token chain, add it
+ // to the worklist.
+ SDNode *User = *UI;
+ for (unsigned i = 0, e = User->getNumValues(); i != e; ++i)
+ if (User->getValueType(i) == MVT::Other) {
+ Worklist.push_back(SDOperand(User, i));
+ break;
+ }
+ }
+
+ // Finally, legalize this node.
+ Select(Node);
+ }
+
+ // Select target instructions for the DAG.
+ DAG.setRoot(Select(DAG.getRoot()));
+ CodeGenMap.clear();
+ DAG.RemoveDeadNodes();
+
+ // Emit machine code to BB.
+ ScheduleAndEmitDAG(DAG);
+}
+
/// getGlobalBaseReg - Output the instructions required to put the
/// base address to use for accessing globals into a register.
///
-unsigned PPC32DAGToDAGISel::getGlobalBaseReg() {
+SDOperand PPC32DAGToDAGISel::getGlobalBaseReg() {
if (!GlobalBaseReg) {
// Insert the set of GlobalBaseReg into the first MBB of the function
MachineBasicBlock &FirstMBB = BB->getParent()->front();
BuildMI(FirstMBB, MBBI, PPC::MovePCtoLR, 0, PPC::LR);
BuildMI(FirstMBB, MBBI, PPC::MFLR, 1, GlobalBaseReg);
}
- return GlobalBaseReg;
+ return CurDAG->getRegister(GlobalBaseReg, MVT::i32);
}
// look for the first zero bit after the run of ones
ME = CountLeadingZeros_32((Val - 1) ^ Val);
return true;
- } else if (isShiftedMask_32(Val = ~Val)) { // invert mask
- // effectively look for the first zero bit
- ME = CountLeadingZeros_32(Val) - 1;
- // effectively look for the first one bit after the run of zeros
- MB = CountLeadingZeros_32((Val - 1) ^ Val) + 1;
- return true;
+ } else {
+ Val = ~Val; // invert mask
+ if (isShiftedMask_32(Val)) {
+ // effectively look for the first zero bit
+ ME = CountLeadingZeros_32(Val) - 1;
+ // effectively look for the first one bit after the run of zeros
+ MB = CountLeadingZeros_32((Val - 1) ^ Val) + 1;
+ return true;
+ }
}
// no run present
return false;
}
-// isRotateAndMask - Returns true if Mask and Shift can be folded in to a rotate
+// isRotateAndMask - Returns true if Mask and Shift can be folded into a rotate
// and mask opcode and mask operation.
static bool isRotateAndMask(SDNode *N, unsigned Mask, bool IsShiftMask,
unsigned &SH, unsigned &MB, unsigned &ME) {
unsigned Shift = 32;
unsigned Indeterminant = ~0; // bit mask marking indeterminant results
unsigned Opcode = N->getOpcode();
- if (!isIntImmediate(N->getOperand(1).Val, Shift) || (Shift > 31))
+ if (N->getNumOperands() != 2 ||
+ !isIntImmediate(N->getOperand(1).Val, Shift) || (Shift > 31))
return false;
if (Opcode == ISD::SHL) {
// Generate Mask value for Target
if (isIntImmediate(Op0.getOperand(1), Value)) {
switch(Op0Opc) {
- case ISD::SHL: TgtMask <<= Value; break;
- case ISD::SRL: TgtMask >>= Value; break;
- case ISD::AND: TgtMask &= Value; break;
+ case ISD::SHL: TgtMask <<= Value; break;
+ case ISD::SRL: TgtMask >>= Value; break;
+ case ISD::AND: TgtMask &= Value; break;
}
} else {
return 0;
}
// Generate Mask value for Insert
- if (isIntImmediate(Op1.getOperand(1), Value)) {
- switch(Op1Opc) {
- case ISD::SHL:
- SH = Value;
- InsMask <<= SH;
- if (Op0Opc == ISD::SRL) IsRotate = true;
- break;
- case ISD::SRL:
- SH = Value;
- InsMask >>= SH;
- SH = 32-SH;
- if (Op0Opc == ISD::SHL) IsRotate = true;
- break;
- case ISD::AND:
- InsMask &= Value;
- break;
- }
- } else {
+ if (!isIntImmediate(Op1.getOperand(1), Value))
return 0;
+
+ switch(Op1Opc) {
+ case ISD::SHL:
+ SH = Value;
+ InsMask <<= SH;
+ if (Op0Opc == ISD::SRL) IsRotate = true;
+ break;
+ case ISD::SRL:
+ SH = Value;
+ InsMask >>= SH;
+ SH = 32-SH;
+ if (Op0Opc == ISD::SHL) IsRotate = true;
+ break;
+ case ISD::AND:
+ InsMask &= Value;
+ break;
}
// If both of the inputs are ANDs and one of them has a logical shift by
return Opr0.Val;
}
+/// SelectAddr - Given the specified address, return the two operands for a
+/// load/store instruction, and return true if it should be an indexed [r+r]
+/// operation.
+bool PPC32DAGToDAGISel::SelectAddr(SDOperand Addr, SDOperand &Op1,
+ SDOperand &Op2) {
+ unsigned imm = 0;
+ if (Addr.getOpcode() == ISD::ADD) {
+ if (isIntImmediate(Addr.getOperand(1), imm) && isInt16(imm)) {
+ Op1 = getI32Imm(Lo16(imm));
+ if (FrameIndexSDNode *FI =
+ dyn_cast<FrameIndexSDNode>(Addr.getOperand(0))) {
+ ++FrameOff;
+ Op2 = CurDAG->getTargetFrameIndex(FI->getIndex(), MVT::i32);
+ } else {
+ Op2 = Select(Addr.getOperand(0));
+ }
+ return false;
+ } else {
+ Op1 = Select(Addr.getOperand(0));
+ Op2 = Select(Addr.getOperand(1));
+ return true; // [r+r]
+ }
+ }
+
+ // Now check if we're dealing with a global, and whether or not we should emit
+ // an optimized load or store for statics.
+ if (GlobalAddressSDNode *GN = dyn_cast<GlobalAddressSDNode>(Addr)) {
+ GlobalValue *GV = GN->getGlobal();
+ if (!GV->hasWeakLinkage() && !GV->isExternal()) {
+ Op1 = CurDAG->getTargetGlobalAddress(GV, MVT::i32);
+ if (PICEnabled)
+ Op2 = CurDAG->getTargetNode(PPC::ADDIS, MVT::i32, getGlobalBaseReg(),
+ Op1);
+ else
+ Op2 = CurDAG->getTargetNode(PPC::LIS, MVT::i32, Op1);
+ return false;
+ }
+ } else if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(Addr)) {
+ Op1 = getI32Imm(0);
+ Op2 = CurDAG->getTargetFrameIndex(FI->getIndex(), MVT::i32);
+ return false;
+ } else if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(Addr)) {
+ Op1 = Addr;
+ if (PICEnabled)
+ Op2 = CurDAG->getTargetNode(PPC::ADDIS, MVT::i32, getGlobalBaseReg(),Op1);
+ else
+ Op2 = CurDAG->getTargetNode(PPC::LIS, MVT::i32, Op1);
+ return false;
+ }
+ Op1 = getI32Imm(0);
+ Op2 = Select(Addr);
+ return false;
+}
+
+/// SelectCC - Select a comparison of the specified values with the specified
+/// condition code, returning the CR# of the expression.
+SDOperand PPC32DAGToDAGISel::SelectCC(SDOperand LHS, SDOperand RHS,
+ ISD::CondCode CC) {
+ // Always select the LHS.
+ LHS = Select(LHS);
+
+ // Use U to determine whether the SETCC immediate range is signed or not.
+ if (MVT::isInteger(LHS.getValueType())) {
+ bool U = ISD::isUnsignedIntSetCC(CC);
+ unsigned Imm;
+ if (isIntImmediate(RHS, Imm) &&
+ ((U && isUInt16(Imm)) || (!U && isInt16(Imm))))
+ return CurDAG->getTargetNode(U ? PPC::CMPLWI : PPC::CMPWI, MVT::i32,
+ LHS, getI32Imm(Lo16(Imm)));
+ return CurDAG->getTargetNode(U ? PPC::CMPLW : PPC::CMPW, MVT::i32,
+ LHS, Select(RHS));
+ } else if (LHS.getValueType() == MVT::f32) {
+ return CurDAG->getTargetNode(PPC::FCMPUS, MVT::i32, LHS, Select(RHS));
+ } else {
+ return CurDAG->getTargetNode(PPC::FCMPUD, MVT::i32, LHS, Select(RHS));
+ }
+}
+
+/// getBCCForSetCC - Returns the PowerPC condition branch mnemonic corresponding
+/// to Condition.
+static unsigned getBCCForSetCC(ISD::CondCode CC) {
+ switch (CC) {
+ default: assert(0 && "Unknown condition!"); abort();
+ case ISD::SETEQ: return PPC::BEQ;
+ case ISD::SETNE: return PPC::BNE;
+ case ISD::SETULT:
+ case ISD::SETLT: return PPC::BLT;
+ case ISD::SETULE:
+ case ISD::SETLE: return PPC::BLE;
+ case ISD::SETUGT:
+ case ISD::SETGT: return PPC::BGT;
+ case ISD::SETUGE:
+ case ISD::SETGE: return PPC::BGE;
+ }
+ return 0;
+}
+
+/// getCRIdxForSetCC - Return the index of the condition register field
+/// associated with the SetCC condition, and whether or not the field is
+/// treated as inverted. That is, lt = 0; ge = 0 inverted.
+static unsigned getCRIdxForSetCC(ISD::CondCode CC, bool& Inv) {
+ switch (CC) {
+ default: assert(0 && "Unknown condition!"); abort();
+ case ISD::SETULT:
+ case ISD::SETLT: Inv = false; return 0;
+ case ISD::SETUGE:
+ case ISD::SETGE: Inv = true; return 0;
+ case ISD::SETUGT:
+ case ISD::SETGT: Inv = false; return 1;
+ case ISD::SETULE:
+ case ISD::SETLE: Inv = true; return 1;
+ case ISD::SETEQ: Inv = false; return 2;
+ case ISD::SETNE: Inv = true; return 2;
+ }
+ return 0;
+}
+
+// Structure used to return the necessary information to codegen an SDIV as
+// a multiply.
+struct ms {
+ int m; // magic number
+ int s; // shift amount
+};
+
+struct mu {
+ unsigned int m; // magic number
+ int a; // add indicator
+ int s; // shift amount
+};
+
+/// magic - calculate the magic numbers required to codegen an integer sdiv as
+/// a sequence of multiply and shifts. Requires that the divisor not be 0, 1,
+/// or -1.
+static struct ms magic(int d) {
+ int p;
+ unsigned int ad, anc, delta, q1, r1, q2, r2, t;
+ const unsigned int two31 = 0x80000000U;
+ struct ms mag;
+
+ ad = abs(d);
+ t = two31 + ((unsigned int)d >> 31);
+ anc = t - 1 - t%ad; // absolute value of nc
+ p = 31; // initialize p
+ q1 = two31/anc; // initialize q1 = 2p/abs(nc)
+ r1 = two31 - q1*anc; // initialize r1 = rem(2p,abs(nc))
+ q2 = two31/ad; // initialize q2 = 2p/abs(d)
+ r2 = two31 - q2*ad; // initialize r2 = rem(2p,abs(d))
+ do {
+ p = p + 1;
+ q1 = 2*q1; // update q1 = 2p/abs(nc)
+ r1 = 2*r1; // update r1 = rem(2p/abs(nc))
+ if (r1 >= anc) { // must be unsigned comparison
+ q1 = q1 + 1;
+ r1 = r1 - anc;
+ }
+ q2 = 2*q2; // update q2 = 2p/abs(d)
+ r2 = 2*r2; // update r2 = rem(2p/abs(d))
+ if (r2 >= ad) { // must be unsigned comparison
+ q2 = q2 + 1;
+ r2 = r2 - ad;
+ }
+ delta = ad - r2;
+ } while (q1 < delta || (q1 == delta && r1 == 0));
+
+ mag.m = q2 + 1;
+ if (d < 0) mag.m = -mag.m; // resulting magic number
+ mag.s = p - 32; // resulting shift
+ return mag;
+}
+
+/// magicu - calculate the magic numbers required to codegen an integer udiv as
+/// a sequence of multiply, add and shifts. Requires that the divisor not be 0.
+static struct mu magicu(unsigned d)
+{
+ int p;
+ unsigned int nc, delta, q1, r1, q2, r2;
+ struct mu magu;
+ magu.a = 0; // initialize "add" indicator
+ nc = - 1 - (-d)%d;
+ p = 31; // initialize p
+ q1 = 0x80000000/nc; // initialize q1 = 2p/nc
+ r1 = 0x80000000 - q1*nc; // initialize r1 = rem(2p,nc)
+ q2 = 0x7FFFFFFF/d; // initialize q2 = (2p-1)/d
+ r2 = 0x7FFFFFFF - q2*d; // initialize r2 = rem((2p-1),d)
+ do {
+ p = p + 1;
+ if (r1 >= nc - r1 ) {
+ q1 = 2*q1 + 1; // update q1
+ r1 = 2*r1 - nc; // update r1
+ }
+ else {
+ q1 = 2*q1; // update q1
+ r1 = 2*r1; // update r1
+ }
+ if (r2 + 1 >= d - r2) {
+ if (q2 >= 0x7FFFFFFF) magu.a = 1;
+ q2 = 2*q2 + 1; // update q2
+ r2 = 2*r2 + 1 - d; // update r2
+ }
+ else {
+ if (q2 >= 0x80000000) magu.a = 1;
+ q2 = 2*q2; // update q2
+ r2 = 2*r2 + 1; // update r2
+ }
+ delta = d - 1 - r2;
+ } while (p < 64 && (q1 < delta || (q1 == delta && r1 == 0)));
+ magu.m = q2 + 1; // resulting magic number
+ magu.s = p - 32; // resulting shift
+ return magu;
+}
+
+/// BuildSDIVSequence - Given an ISD::SDIV node expressing a divide by constant,
+/// return a DAG expression to select that will generate the same value by
+/// multiplying by a magic number. See:
+/// <http://the.wall.riscom.net/books/proc/ppc/cwg/code2.html>
+SDOperand PPC32DAGToDAGISel::BuildSDIVSequence(SDNode *N) {
+ int d = (int)cast<ConstantSDNode>(N->getOperand(1))->getValue();
+ ms magics = magic(d);
+ // Multiply the numerator (operand 0) by the magic value
+ SDOperand Q = CurDAG->getNode(ISD::MULHS, MVT::i32, N->getOperand(0),
+ CurDAG->getConstant(magics.m, MVT::i32));
+ // If d > 0 and m < 0, add the numerator
+ if (d > 0 && magics.m < 0)
+ Q = CurDAG->getNode(ISD::ADD, MVT::i32, Q, N->getOperand(0));
+ // If d < 0 and m > 0, subtract the numerator.
+ if (d < 0 && magics.m > 0)
+ Q = CurDAG->getNode(ISD::SUB, MVT::i32, Q, N->getOperand(0));
+ // Shift right algebraic if shift value is nonzero
+ if (magics.s > 0)
+ Q = CurDAG->getNode(ISD::SRA, MVT::i32, Q,
+ CurDAG->getConstant(magics.s, MVT::i32));
+ // Extract the sign bit and add it to the quotient
+ SDOperand T =
+ CurDAG->getNode(ISD::SRL, MVT::i32, Q, CurDAG->getConstant(31, MVT::i32));
+ return CurDAG->getNode(ISD::ADD, MVT::i32, Q, T);
+}
+
+/// BuildUDIVSequence - Given an ISD::UDIV node expressing a divide by constant,
+/// return a DAG expression to select that will generate the same value by
+/// multiplying by a magic number. See:
+/// <http://the.wall.riscom.net/books/proc/ppc/cwg/code2.html>
+SDOperand PPC32DAGToDAGISel::BuildUDIVSequence(SDNode *N) {
+ unsigned d = (unsigned)cast<ConstantSDNode>(N->getOperand(1))->getValue();
+ mu magics = magicu(d);
+ // Multiply the numerator (operand 0) by the magic value
+ SDOperand Q = CurDAG->getNode(ISD::MULHU, MVT::i32, N->getOperand(0),
+ CurDAG->getConstant(magics.m, MVT::i32));
+ if (magics.a == 0) {
+ return CurDAG->getNode(ISD::SRL, MVT::i32, Q,
+ CurDAG->getConstant(magics.s, MVT::i32));
+ } else {
+ SDOperand NPQ = CurDAG->getNode(ISD::SUB, MVT::i32, N->getOperand(0), Q);
+ NPQ = CurDAG->getNode(ISD::SRL, MVT::i32, NPQ,
+ CurDAG->getConstant(1, MVT::i32));
+ NPQ = CurDAG->getNode(ISD::ADD, MVT::i32, NPQ, Q);
+ return CurDAG->getNode(ISD::SRL, MVT::i32, NPQ,
+ CurDAG->getConstant(magics.s-1, MVT::i32));
+ }
+}
+
+SDOperand PPC32DAGToDAGISel::SelectDYNAMIC_STACKALLOC(SDOperand Op) {
+ SDNode *N = Op.Val;
+
+ // FIXME: We are currently ignoring the requested alignment for handling
+ // greater than the stack alignment. This will need to be revisited at some
+ // point. Align = N.getOperand(2);
+ if (!isa<ConstantSDNode>(N->getOperand(2)) ||
+ cast<ConstantSDNode>(N->getOperand(2))->getValue() != 0) {
+ std::cerr << "Cannot allocate stack object with greater alignment than"
+ << " the stack alignment yet!";
+ abort();
+ }
+ SDOperand Chain = Select(N->getOperand(0));
+ SDOperand Amt = Select(N->getOperand(1));
+
+ SDOperand R1Reg = CurDAG->getRegister(PPC::R1, MVT::i32);
+
+ SDOperand R1Val = CurDAG->getCopyFromReg(Chain, PPC::R1, MVT::i32);
+ Chain = R1Val.getValue(1);
+
+ // Subtract the amount (guaranteed to be a multiple of the stack alignment)
+ // from the stack pointer, giving us the result pointer.
+ SDOperand Result = CurDAG->getTargetNode(PPC::SUBF, MVT::i32, Amt, R1Val);
+
+ // Copy this result back into R1.
+ Chain = CurDAG->getNode(ISD::CopyToReg, MVT::Other, Chain, R1Reg, Result);
+
+ // Copy this result back out of R1 to make sure we're not using the stack
+ // space without decrementing the stack pointer.
+ Result = CurDAG->getCopyFromReg(Chain, PPC::R1, MVT::i32);
+
+ // Finally, replace the DYNAMIC_STACKALLOC with the copyfromreg.
+ CodeGenMap[Op.getValue(0)] = Result;
+ CodeGenMap[Op.getValue(1)] = Result.getValue(1);
+ return SDOperand(Result.Val, Op.ResNo);
+}
+
+SDOperand PPC32DAGToDAGISel::SelectADD_PARTS(SDOperand Op) {
+ SDNode *N = Op.Val;
+ SDOperand LHSL = Select(N->getOperand(0));
+ SDOperand LHSH = Select(N->getOperand(1));
+
+ unsigned Imm;
+ bool ME = false, ZE = false;
+ if (isIntImmediate(N->getOperand(3), Imm)) {
+ ME = (signed)Imm == -1;
+ ZE = Imm == 0;
+ }
+
+ std::vector<SDOperand> Result;
+ SDOperand CarryFromLo;
+ if (isIntImmediate(N->getOperand(2), Imm) &&
+ ((signed)Imm >= -32768 || (signed)Imm < 32768)) {
+ // Codegen the low 32 bits of the add. Interestingly, there is no
+ // shifted form of add immediate carrying.
+ CarryFromLo = CurDAG->getTargetNode(PPC::ADDIC, MVT::i32, MVT::Flag,
+ LHSL, getI32Imm(Imm));
+ } else {
+ CarryFromLo = CurDAG->getTargetNode(PPC::ADDC, MVT::i32, MVT::Flag,
+ LHSL, Select(N->getOperand(2)));
+ }
+ CarryFromLo = CarryFromLo.getValue(1);
+
+ // Codegen the high 32 bits, adding zero, minus one, or the full value
+ // along with the carry flag produced by addc/addic.
+ SDOperand ResultHi;
+ if (ZE)
+ ResultHi = CurDAG->getTargetNode(PPC::ADDZE, MVT::i32, LHSH, CarryFromLo);
+ else if (ME)
+ ResultHi = CurDAG->getTargetNode(PPC::ADDME, MVT::i32, LHSH, CarryFromLo);
+ else
+ ResultHi = CurDAG->getTargetNode(PPC::ADDE, MVT::i32, LHSH,
+ Select(N->getOperand(3)), CarryFromLo);
+ Result.push_back(CarryFromLo.getValue(0));
+ Result.push_back(ResultHi);
+
+ CodeGenMap[Op.getValue(0)] = Result[0];
+ CodeGenMap[Op.getValue(1)] = Result[1];
+ return Result[Op.ResNo];
+}
+SDOperand PPC32DAGToDAGISel::SelectSUB_PARTS(SDOperand Op) {
+ SDNode *N = Op.Val;
+ SDOperand LHSL = Select(N->getOperand(0));
+ SDOperand LHSH = Select(N->getOperand(1));
+ SDOperand RHSL = Select(N->getOperand(2));
+ SDOperand RHSH = Select(N->getOperand(3));
+
+ std::vector<SDOperand> Result;
+ Result.push_back(CurDAG->getTargetNode(PPC::SUBFC, MVT::i32, MVT::Flag,
+ RHSL, LHSL));
+ Result.push_back(CurDAG->getTargetNode(PPC::SUBFE, MVT::i32, RHSH, LHSH,
+ Result[0].getValue(1)));
+ CodeGenMap[Op.getValue(0)] = Result[0];
+ CodeGenMap[Op.getValue(1)] = Result[1];
+ return Result[Op.ResNo];
+}
+
+SDOperand PPC32DAGToDAGISel::SelectSETCC(SDOperand Op) {
+ SDNode *N = Op.Val;
+ unsigned Imm;
+ ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(2))->get();
+ if (isIntImmediate(N->getOperand(1), Imm)) {
+ // We can codegen setcc op, imm very efficiently compared to a brcond.
+ // Check for those cases here.
+ // setcc op, 0
+ if (Imm == 0) {
+ SDOperand Op = Select(N->getOperand(0));
+ switch (CC) {
+ default: assert(0 && "Unhandled SetCC condition"); abort();
+ case ISD::SETEQ:
+ Op = CurDAG->getTargetNode(PPC::CNTLZW, MVT::i32, Op);
+ CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Op, getI32Imm(27),
+ getI32Imm(5), getI32Imm(31));
+ break;
+ case ISD::SETNE: {
+ SDOperand AD = CurDAG->getTargetNode(PPC::ADDIC, MVT::i32, MVT::Flag,
+ Op, getI32Imm(~0U));
+ CurDAG->SelectNodeTo(N, PPC::SUBFE, MVT::i32, AD, Op, AD.getValue(1));
+ break;
+ }
+ case ISD::SETLT:
+ CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Op, getI32Imm(1),
+ getI32Imm(31), getI32Imm(31));
+ break;
+ case ISD::SETGT: {
+ SDOperand T = CurDAG->getTargetNode(PPC::NEG, MVT::i32, Op);
+ T = CurDAG->getTargetNode(PPC::ANDC, MVT::i32, T, Op);;
+ CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, T, getI32Imm(1),
+ getI32Imm(31), getI32Imm(31));
+ break;
+ }
+ }
+ return SDOperand(N, 0);
+ } else if (Imm == ~0U) { // setcc op, -1
+ SDOperand Op = Select(N->getOperand(0));
+ switch (CC) {
+ default: assert(0 && "Unhandled SetCC condition"); abort();
+ case ISD::SETEQ:
+ Op = CurDAG->getTargetNode(PPC::ADDIC, MVT::i32, MVT::Flag,
+ Op, getI32Imm(1));
+ CurDAG->SelectNodeTo(N, PPC::ADDZE, MVT::i32,
+ CurDAG->getTargetNode(PPC::LI, MVT::i32,
+ getI32Imm(0)),
+ Op.getValue(1));
+ break;
+ case ISD::SETNE: {
+ Op = CurDAG->getTargetNode(PPC::NOR, MVT::i32, Op, Op);
+ SDOperand AD = CurDAG->getTargetNode(PPC::ADDIC, MVT::i32, MVT::Flag,
+ Op, getI32Imm(~0U));
+ CurDAG->SelectNodeTo(N, PPC::SUBFE, MVT::i32, AD, Op, AD.getValue(1));
+ break;
+ }
+ case ISD::SETLT: {
+ SDOperand AD = CurDAG->getTargetNode(PPC::ADDI, MVT::i32, Op,
+ getI32Imm(1));
+ SDOperand AN = CurDAG->getTargetNode(PPC::AND, MVT::i32, AD, Op);
+ CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, AN, getI32Imm(1),
+ getI32Imm(31), getI32Imm(31));
+ break;
+ }
+ case ISD::SETGT:
+ Op = CurDAG->getTargetNode(PPC::RLWINM, MVT::i32, Op, getI32Imm(1),
+ getI32Imm(31), getI32Imm(31));
+ CurDAG->SelectNodeTo(N, PPC::XORI, MVT::i32, Op, getI32Imm(1));
+ break;
+ }
+ return SDOperand(N, 0);
+ }
+ }
+
+ bool Inv;
+ unsigned Idx = getCRIdxForSetCC(CC, Inv);
+ SDOperand CCReg = SelectCC(N->getOperand(0), N->getOperand(1), CC);
+ SDOperand IntCR;
+
+ // Force the ccreg into CR7.
+ SDOperand CR7Reg = CurDAG->getRegister(PPC::CR7, MVT::i32);
+
+ std::vector<MVT::ValueType> VTs;
+ VTs.push_back(MVT::Other);
+ VTs.push_back(MVT::Flag); // NONSTANDARD CopyToReg node: defines a flag
+ std::vector<SDOperand> Ops;
+ Ops.push_back(CurDAG->getEntryNode());
+ Ops.push_back(CR7Reg);
+ Ops.push_back(CCReg);
+ CCReg = CurDAG->getNode(ISD::CopyToReg, VTs, Ops).getValue(1);
+
+ if (TLI.getTargetMachine().getSubtarget<PPCSubtarget>().isGigaProcessor())
+ IntCR = CurDAG->getTargetNode(PPC::MFOCRF, MVT::i32, CR7Reg, CCReg);
+ else
+ IntCR = CurDAG->getTargetNode(PPC::MFCR, MVT::i32, CCReg);
+
+ if (!Inv) {
+ CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, IntCR,
+ getI32Imm(32-(3-Idx)), getI32Imm(31), getI32Imm(31));
+ } else {
+ SDOperand Tmp =
+ CurDAG->getTargetNode(PPC::RLWINM, MVT::i32, IntCR,
+ getI32Imm(32-(3-Idx)), getI32Imm(31),getI32Imm(31));
+ CurDAG->SelectNodeTo(N, PPC::XORI, MVT::i32, Tmp, getI32Imm(1));
+ }
+
+ return SDOperand(N, 0);
+}
+
+SDOperand PPC32DAGToDAGISel::SelectCALL(SDOperand Op) {
+ SDNode *N = Op.Val;
+ SDOperand Chain = Select(N->getOperand(0));
+
+ unsigned CallOpcode;
+ std::vector<SDOperand> CallOperands;
+
+ if (GlobalAddressSDNode *GASD =
+ dyn_cast<GlobalAddressSDNode>(N->getOperand(1))) {
+ CallOpcode = PPC::CALLpcrel;
+ CallOperands.push_back(CurDAG->getTargetGlobalAddress(GASD->getGlobal(),
+ MVT::i32));
+ } else if (ExternalSymbolSDNode *ESSDN =
+ dyn_cast<ExternalSymbolSDNode>(N->getOperand(1))) {
+ CallOpcode = PPC::CALLpcrel;
+ CallOperands.push_back(N->getOperand(1));
+ } else {
+ // Copy the callee address into the CTR register.
+ SDOperand Callee = Select(N->getOperand(1));
+ Chain = CurDAG->getTargetNode(PPC::MTCTR, MVT::Other, Callee, Chain);
+
+ // Copy the callee address into R12 on darwin.
+ SDOperand R12 = CurDAG->getRegister(PPC::R12, MVT::i32);
+ Chain = CurDAG->getNode(ISD::CopyToReg, MVT::Other, Chain, R12, Callee);
+
+ CallOperands.push_back(getI32Imm(20)); // Information to encode indcall
+ CallOperands.push_back(getI32Imm(0)); // Information to encode indcall
+ CallOperands.push_back(R12);
+ CallOpcode = PPC::CALLindirect;
+ }
+
+ unsigned GPR_idx = 0, FPR_idx = 0;
+ static const unsigned GPR[] = {
+ PPC::R3, PPC::R4, PPC::R5, PPC::R6,
+ PPC::R7, PPC::R8, PPC::R9, PPC::R10,
+ };
+ static const unsigned FPR[] = {
+ PPC::F1, PPC::F2, PPC::F3, PPC::F4, PPC::F5, PPC::F6, PPC::F7,
+ PPC::F8, PPC::F9, PPC::F10, PPC::F11, PPC::F12, PPC::F13
+ };
+
+ SDOperand InFlag; // Null incoming flag value.
+
+ for (unsigned i = 2, e = N->getNumOperands(); i != e; ++i) {
+ unsigned DestReg = 0;
+ MVT::ValueType RegTy = N->getOperand(i).getValueType();
+ if (RegTy == MVT::i32) {
+ assert(GPR_idx < 8 && "Too many int args");
+ DestReg = GPR[GPR_idx++];
+ } else {
+ assert(MVT::isFloatingPoint(N->getOperand(i).getValueType()) &&
+ "Unpromoted integer arg?");
+ assert(FPR_idx < 13 && "Too many fp args");
+ DestReg = FPR[FPR_idx++];
+ }
+
+ if (N->getOperand(i).getOpcode() != ISD::UNDEF) {
+ SDOperand Val = Select(N->getOperand(i));
+ Chain = CurDAG->getCopyToReg(Chain, DestReg, Val, InFlag);
+ InFlag = Chain.getValue(1);
+ CallOperands.push_back(CurDAG->getRegister(DestReg, RegTy));
+ }
+ }
+
+ // Finally, once everything is in registers to pass to the call, emit the
+ // call itself.
+ if (InFlag.Val)
+ CallOperands.push_back(InFlag); // Strong dep on register copies.
+ else
+ CallOperands.push_back(Chain); // Weak dep on whatever occurs before
+ Chain = CurDAG->getTargetNode(CallOpcode, MVT::Other, MVT::Flag,
+ CallOperands);
+
+ std::vector<SDOperand> CallResults;
+
+ // If the call has results, copy the values out of the ret val registers.
+ switch (N->getValueType(0)) {
+ default: assert(0 && "Unexpected ret value!");
+ case MVT::Other: break;
+ case MVT::i32:
+ if (N->getValueType(1) == MVT::i32) {
+ Chain = CurDAG->getCopyFromReg(Chain, PPC::R4, MVT::i32,
+ Chain.getValue(1)).getValue(1);
+ CallResults.push_back(Chain.getValue(0));
+ Chain = CurDAG->getCopyFromReg(Chain, PPC::R3, MVT::i32,
+ Chain.getValue(2)).getValue(1);
+ CallResults.push_back(Chain.getValue(0));
+ } else {
+ Chain = CurDAG->getCopyFromReg(Chain, PPC::R3, MVT::i32,
+ Chain.getValue(1)).getValue(1);
+ CallResults.push_back(Chain.getValue(0));
+ }
+ break;
+ case MVT::f32:
+ case MVT::f64:
+ Chain = CurDAG->getCopyFromReg(Chain, PPC::F1, N->getValueType(0),
+ Chain.getValue(1)).getValue(1);
+ CallResults.push_back(Chain.getValue(0));
+ break;
+ }
+
+ CallResults.push_back(Chain);
+ for (unsigned i = 0, e = CallResults.size(); i != e; ++i)
+ CodeGenMap[Op.getValue(i)] = CallResults[i];
+ return CallResults[Op.ResNo];
+}
// Select - Convert the specified operand from a target-independent to a
// target-specific node if it hasn't already been changed.
SDOperand PPC32DAGToDAGISel::Select(SDOperand Op) {
SDNode *N = Op.Val;
- if (N->getOpcode() >= ISD::BUILTIN_OP_END)
+ if (N->getOpcode() >= ISD::BUILTIN_OP_END &&
+ N->getOpcode() < PPCISD::FIRST_NUMBER)
return Op; // Already selected.
+
+ // If this has already been converted, use it.
+ std::map<SDOperand, SDOperand>::iterator CGMI = CodeGenMap.find(Op);
+ if (CGMI != CodeGenMap.end()) return CGMI->second;
switch (N->getOpcode()) {
- default:
- std::cerr << "Cannot yet select: ";
- N->dump();
- std::cerr << "\n";
- abort();
- case ISD::EntryToken: // These leaves remain the same.
- case ISD::UNDEF:
- return Op;
+ default: break;
+ case ISD::DYNAMIC_STACKALLOC: return SelectDYNAMIC_STACKALLOC(Op);
+ case ISD::ADD_PARTS: return SelectADD_PARTS(Op);
+ case ISD::SUB_PARTS: return SelectSUB_PARTS(Op);
+ case ISD::SETCC: return SelectSETCC(Op);
+ case ISD::CALL: return SelectCALL(Op);
+ case ISD::TAILCALL: return SelectCALL(Op);
+
case ISD::TokenFactor: {
SDOperand New;
if (N->getNumOperands() == 2) {
New = CurDAG->getNode(ISD::TokenFactor, MVT::Other, Ops);
}
- if (New.Val != N) {
- CurDAG->ReplaceAllUsesWith(N, New.Val);
- N = New.Val;
- }
- break;
+ CodeGenMap[Op] = New;
+ return New;
}
case ISD::CopyFromReg: {
SDOperand Chain = Select(N->getOperand(0));
SDOperand Chain = Select(N->getOperand(0));
SDOperand Reg = N->getOperand(1);
SDOperand Val = Select(N->getOperand(2));
- if (Chain != N->getOperand(0) || Val != N->getOperand(2)) {
- SDOperand New = CurDAG->getNode(ISD::CopyToReg, MVT::Other,
- Chain, Reg, Val);
- CurDAG->ReplaceAllUsesWith(N, New.Val);
- N = New.Val;
- }
- break;
- }
- case ISD::Constant: {
- assert(N->getValueType(0) == MVT::i32);
- unsigned v = (unsigned)cast<ConstantSDNode>(N)->getValue();
- unsigned Hi = HA16(v);
- unsigned Lo = Lo16(v);
- if (Hi && Lo) {
- SDOperand Top = CurDAG->getTargetNode(PPC::LIS, MVT::i32,
- getI32Imm(v >> 16));
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::ORI, Top, getI32Imm(v & 0xFFFF));
- } else if (Lo) {
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::LI, getI32Imm(v));
- } else {
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::LIS, getI32Imm(v >> 16));
- }
- break;
+ SDOperand New = CurDAG->getNode(ISD::CopyToReg, MVT::Other,
+ Chain, Reg, Val);
+ CodeGenMap[Op] = New;
+ return New;
+ }
+ case ISD::UNDEF:
+ if (N->getValueType(0) == MVT::i32)
+ CurDAG->SelectNodeTo(N, PPC::IMPLICIT_DEF_GPR, MVT::i32);
+ else if (N->getValueType(0) == MVT::f32)
+ CurDAG->SelectNodeTo(N, PPC::IMPLICIT_DEF_F4, MVT::f32);
+ else
+ CurDAG->SelectNodeTo(N, PPC::IMPLICIT_DEF_F8, MVT::f64);
+ return SDOperand(N, 0);
+ case ISD::FrameIndex: {
+ int FI = cast<FrameIndexSDNode>(N)->getIndex();
+ CurDAG->SelectNodeTo(N, PPC::ADDI, MVT::i32,
+ CurDAG->getTargetFrameIndex(FI, MVT::i32),
+ getI32Imm(0));
+ return SDOperand(N, 0);
+ }
+ case ISD::ConstantPool: {
+ Constant *C = cast<ConstantPoolSDNode>(N)->get();
+ SDOperand Tmp, CPI = CurDAG->getTargetConstantPool(C, MVT::i32);
+ if (PICEnabled)
+ Tmp = CurDAG->getTargetNode(PPC::ADDIS, MVT::i32, getGlobalBaseReg(),CPI);
+ else
+ Tmp = CurDAG->getTargetNode(PPC::LIS, MVT::i32, CPI);
+ CurDAG->SelectNodeTo(N, PPC::LA, MVT::i32, Tmp, CPI);
+ return SDOperand(N, 0);
}
case ISD::GlobalAddress: {
GlobalValue *GV = cast<GlobalAddressSDNode>(N)->getGlobal();
SDOperand Tmp;
SDOperand GA = CurDAG->getTargetGlobalAddress(GV, MVT::i32);
- if (PICEnabled) {
- SDOperand PICBaseReg = CurDAG->getRegister(getGlobalBaseReg(), MVT::i32);
- Tmp = CurDAG->getTargetNode(PPC::ADDIS, MVT::i32, PICBaseReg, GA);
- } else {
+ if (PICEnabled)
+ Tmp = CurDAG->getTargetNode(PPC::ADDIS, MVT::i32, getGlobalBaseReg(), GA);
+ else
Tmp = CurDAG->getTargetNode(PPC::LIS, MVT::i32, GA);
- }
+
if (GV->hasWeakLinkage() || GV->isExternal())
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::LWZ, GA, Tmp);
+ CurDAG->SelectNodeTo(N, PPC::LWZ, MVT::i32, GA, Tmp);
else
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::LA, Tmp, GA);
- break;
+ CurDAG->SelectNodeTo(N, PPC::LA, MVT::i32, Tmp, GA);
+ return SDOperand(N, 0);
}
- case ISD::SIGN_EXTEND_INREG:
- switch(cast<VTSDNode>(N->getOperand(1))->getVT()) {
- default: assert(0 && "Illegal type in SIGN_EXTEND_INREG"); break;
- case MVT::i16:
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::EXTSH, Select(N->getOperand(0)));
- break;
- case MVT::i8:
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::EXTSB, Select(N->getOperand(0)));
- break;
- }
- break;
- case ISD::CTLZ:
- assert(N->getValueType(0) == MVT::i32);
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::CNTLZW, Select(N->getOperand(0)));
- break;
- case ISD::ADD: {
- MVT::ValueType Ty = N->getValueType(0);
- if (Ty == MVT::i32) {
- if (SDNode *I = SelectIntImmediateExpr(N->getOperand(0), N->getOperand(1),
- PPC::ADDIS, PPC::ADDI, true)) {
- CurDAG->ReplaceAllUsesWith(N, I);
- N = I;
- } else {
- CurDAG->SelectNodeTo(N, Ty, PPC::ADD, Select(N->getOperand(0)),
- Select(N->getOperand(1)));
- }
- break;
- }
+ case PPCISD::FSEL: {
+ SDOperand Comparison = Select(N->getOperand(0));
+ // Extend the comparison to 64-bits.
+ if (Comparison.getValueType() == MVT::f32)
+ Comparison = CurDAG->getTargetNode(PPC::FMRSD, MVT::f64, Comparison);
+
+ unsigned Opc = N->getValueType(0) == MVT::f32 ? PPC::FSELS : PPC::FSELD;
+ CurDAG->SelectNodeTo(N, Opc, N->getValueType(0), Comparison,
+ Select(N->getOperand(1)), Select(N->getOperand(2)));
+ return SDOperand(N, 0);
+ }
+ case PPCISD::FCFID:
+ CurDAG->SelectNodeTo(N, PPC::FCFID, N->getValueType(0),
+ Select(N->getOperand(0)));
+ return SDOperand(N, 0);
+ case PPCISD::FCTIDZ:
+ CurDAG->SelectNodeTo(N, PPC::FCTIDZ, N->getValueType(0),
+ Select(N->getOperand(0)));
+ return SDOperand(N, 0);
+ case PPCISD::FCTIWZ:
+ CurDAG->SelectNodeTo(N, PPC::FCTIWZ, N->getValueType(0),
+ Select(N->getOperand(0)));
+ return SDOperand(N, 0);
+ case ISD::FADD: {
+ MVT::ValueType Ty = N->getValueType(0);
if (!NoExcessFPPrecision) { // Match FMA ops
- if (N->getOperand(0).getOpcode() == ISD::MUL &&
+ if (N->getOperand(0).getOpcode() == ISD::FMUL &&
N->getOperand(0).Val->hasOneUse()) {
++FusedFP; // Statistic
- CurDAG->SelectNodeTo(N, Ty, Ty == MVT::f64 ? PPC::FMADD : PPC::FMADDS,
+ CurDAG->SelectNodeTo(N, Ty == MVT::f64 ? PPC::FMADD : PPC::FMADDS, Ty,
Select(N->getOperand(0).getOperand(0)),
Select(N->getOperand(0).getOperand(1)),
Select(N->getOperand(1)));
- break;
- } else if (N->getOperand(1).getOpcode() == ISD::MUL &&
+ return SDOperand(N, 0);
+ } else if (N->getOperand(1).getOpcode() == ISD::FMUL &&
N->getOperand(1).hasOneUse()) {
++FusedFP; // Statistic
- CurDAG->SelectNodeTo(N, Ty, Ty == MVT::f64 ? PPC::FMADD : PPC::FMADDS,
+ CurDAG->SelectNodeTo(N, Ty == MVT::f64 ? PPC::FMADD : PPC::FMADDS, Ty,
Select(N->getOperand(1).getOperand(0)),
Select(N->getOperand(1).getOperand(1)),
Select(N->getOperand(0)));
- break;
+ return SDOperand(N, 0);
}
}
- CurDAG->SelectNodeTo(N, Ty, Ty == MVT::f64 ? PPC::FADD : PPC::FADDS,
+ CurDAG->SelectNodeTo(N, Ty == MVT::f64 ? PPC::FADD : PPC::FADDS, Ty,
Select(N->getOperand(0)), Select(N->getOperand(1)));
- break;
+ return SDOperand(N, 0);
}
- case ISD::SUB: {
+ case ISD::FSUB: {
MVT::ValueType Ty = N->getValueType(0);
- if (Ty == MVT::i32) {
- unsigned Imm;
- if (isIntImmediate(N->getOperand(0), Imm) && isInt16(Imm)) {
- CurDAG->SelectNodeTo(N, Ty, PPC::SUBFIC, Select(N->getOperand(1)),
- getI32Imm(Lo16(Imm)));
- break;
- }
- if (SDNode *I = SelectIntImmediateExpr(N->getOperand(0), N->getOperand(1),
- PPC::ADDIS, PPC::ADDI, true, true)) {
- CurDAG->ReplaceAllUsesWith(N, I);
- N = I;
- } else {
- CurDAG->SelectNodeTo(N, Ty, PPC::SUBF, Select(N->getOperand(1)),
- Select(N->getOperand(0)));
- }
- break;
- }
if (!NoExcessFPPrecision) { // Match FMA ops
- if (N->getOperand(0).getOpcode() == ISD::MUL &&
+ if (N->getOperand(0).getOpcode() == ISD::FMUL &&
N->getOperand(0).Val->hasOneUse()) {
++FusedFP; // Statistic
- CurDAG->SelectNodeTo(N, Ty, Ty == MVT::f64 ? PPC::FMSUB : PPC::FMSUBS,
+ CurDAG->SelectNodeTo(N, Ty == MVT::f64 ? PPC::FMSUB : PPC::FMSUBS, Ty,
Select(N->getOperand(0).getOperand(0)),
Select(N->getOperand(0).getOperand(1)),
Select(N->getOperand(1)));
- break;
- } else if (N->getOperand(1).getOpcode() == ISD::MUL &&
+ return SDOperand(N, 0);
+ } else if (N->getOperand(1).getOpcode() == ISD::FMUL &&
N->getOperand(1).Val->hasOneUse()) {
++FusedFP; // Statistic
- CurDAG->SelectNodeTo(N, Ty, Ty == MVT::f64 ? PPC::FNMSUB : PPC::FNMSUBS,
+ CurDAG->SelectNodeTo(N, Ty == MVT::f64 ? PPC::FNMSUB : PPC::FNMSUBS, Ty,
Select(N->getOperand(1).getOperand(0)),
Select(N->getOperand(1).getOperand(1)),
Select(N->getOperand(0)));
- break;
+ return SDOperand(N, 0);
}
}
- CurDAG->SelectNodeTo(N, Ty, Ty == MVT::f64 ? PPC::FSUB : PPC::FSUBS,
+ CurDAG->SelectNodeTo(N, Ty == MVT::f64 ? PPC::FSUB : PPC::FSUBS, Ty,
Select(N->getOperand(0)),
Select(N->getOperand(1)));
- break;
+ return SDOperand(N, 0);
}
- case ISD::MUL: {
- unsigned Imm, Opc;
- if (isIntImmediate(N->getOperand(1), Imm) && isInt16(Imm)) {
- CurDAG->SelectNodeTo(N, N->getValueType(0), PPC::MULLI,
- Select(N->getOperand(0)), getI32Imm(Lo16(Imm)));
- break;
- }
- switch (N->getValueType(0)) {
- default: assert(0 && "Unhandled multiply type!");
- case MVT::i32: Opc = PPC::MULLW; break;
- case MVT::f32: Opc = PPC::FMULS; break;
- case MVT::f64: Opc = PPC::FMUL; break;
+ case ISD::SDIV: {
+ unsigned Imm;
+ if (isIntImmediate(N->getOperand(1), Imm)) {
+ if ((signed)Imm > 0 && isPowerOf2_32(Imm)) {
+ SDOperand Op =
+ CurDAG->getTargetNode(PPC::SRAWI, MVT::i32, MVT::Flag,
+ Select(N->getOperand(0)),
+ getI32Imm(Log2_32(Imm)));
+ CurDAG->SelectNodeTo(N, PPC::ADDZE, MVT::i32,
+ Op.getValue(0), Op.getValue(1));
+ return SDOperand(N, 0);
+ } else if ((signed)Imm < 0 && isPowerOf2_32(-Imm)) {
+ SDOperand Op =
+ CurDAG->getTargetNode(PPC::SRAWI, MVT::i32, MVT::Flag,
+ Select(N->getOperand(0)),
+ getI32Imm(Log2_32(-Imm)));
+ SDOperand PT =
+ CurDAG->getTargetNode(PPC::ADDZE, MVT::i32, Op.getValue(0),
+ Op.getValue(1));
+ CurDAG->SelectNodeTo(N, PPC::NEG, MVT::i32, PT);
+ return SDOperand(N, 0);
+ } else if (Imm) {
+ SDOperand Result = Select(BuildSDIVSequence(N));
+ CodeGenMap[Op] = Result;
+ return Result;
+ }
}
- CurDAG->SelectNodeTo(N, N->getValueType(0), Opc, Select(N->getOperand(0)),
- Select(N->getOperand(1)));
+
+ // Other cases are autogenerated.
break;
}
- case ISD::MULHS:
- assert(N->getValueType(0) == MVT::i32);
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::MULHW, Select(N->getOperand(0)),
- Select(N->getOperand(1)));
- break;
- case ISD::MULHU:
- assert(N->getValueType(0) == MVT::i32);
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::MULHWU, Select(N->getOperand(0)),
- Select(N->getOperand(1)));
+ case ISD::UDIV: {
+ // If this is a divide by constant, we can emit code using some magic
+ // constants to implement it as a multiply instead.
+ unsigned Imm;
+ if (isIntImmediate(N->getOperand(1), Imm) && Imm) {
+ SDOperand Result = Select(BuildUDIVSequence(N));
+ CodeGenMap[Op] = Result;
+ return Result;
+ }
+
+ // Other cases are autogenerated.
break;
+ }
case ISD::AND: {
unsigned Imm;
// If this is an and of a value rotated between 0 and 31 bits and then and'd
isRunOfOnes(Imm, MB, ME);
SH = 0;
}
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::RLWINM, Val, getI32Imm(SH),
+ CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Val, getI32Imm(SH),
getI32Imm(MB), getI32Imm(ME));
- break;
+ return SDOperand(N, 0);
}
- // If this is an and with an immediate that isn't a mask, then codegen it as
- // high and low 16 bit immediate ands.
- if (SDNode *I = SelectIntImmediateExpr(N->getOperand(0),
- N->getOperand(1),
- PPC::ANDISo, PPC::ANDIo)) {
- CurDAG->ReplaceAllUsesWith(N, I);
- N = I;
- break;
- }
- // Finally, check for the case where we are being asked to select
- // and (not(a), b) or and (a, not(b)) which can be selected as andc.
- if (isOprNot(N->getOperand(0).Val))
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::ANDC, Select(N->getOperand(1)),
- Select(N->getOperand(0).getOperand(0)));
- else if (isOprNot(N->getOperand(1).Val))
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::ANDC, Select(N->getOperand(0)),
- Select(N->getOperand(1).getOperand(0)));
- else
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::AND, Select(N->getOperand(0)),
- Select(N->getOperand(1)));
+
+ // Other cases are autogenerated.
break;
}
case ISD::OR:
- if (SDNode *I = SelectBitfieldInsert(N)) {
- CurDAG->ReplaceAllUsesWith(N, I);
- N = I;
- break;
- }
- if (SDNode *I = SelectIntImmediateExpr(N->getOperand(0),
- N->getOperand(1),
- PPC::ORIS, PPC::ORI)) {
- CurDAG->ReplaceAllUsesWith(N, I);
- N = I;
- break;
- }
- // Finally, check for the case where we are being asked to select
- // 'or (not(a), b)' or 'or (a, not(b))' which can be selected as orc.
- if (isOprNot(N->getOperand(0).Val))
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::ORC, Select(N->getOperand(1)),
- Select(N->getOperand(0).getOperand(0)));
- else if (isOprNot(N->getOperand(1).Val))
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::ORC, Select(N->getOperand(0)),
- Select(N->getOperand(1).getOperand(0)));
- else
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::OR, Select(N->getOperand(0)),
- Select(N->getOperand(1)));
- break;
- case ISD::XOR:
- // Check whether or not this node is a logical 'not'. This is represented
- // by llvm as a xor with the constant value -1 (all bits set). If this is a
- // 'not', then fold 'or' into 'nor', and so forth for the supported ops.
- if (isOprNot(N)) {
- unsigned Opc;
- SDOperand Val = Select(N->getOperand(0));
- switch (Val.getTargetOpcode()) {
- default: Opc = 0; break;
- case PPC::OR: Opc = PPC::NOR; break;
- case PPC::AND: Opc = PPC::NAND; break;
- case PPC::XOR: Opc = PPC::EQV; break;
- }
- if (Opc)
- CurDAG->SelectNodeTo(N, MVT::i32, Opc, Val.getOperand(0),
- Val.getOperand(1));
- else
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::NOR, Val, Val);
- break;
- }
- // If this is a xor with an immediate other than -1, then codegen it as high
- // and low 16 bit immediate xors.
+ if (SDNode *I = SelectBitfieldInsert(N))
+ return CodeGenMap[Op] = SDOperand(I, 0);
+
if (SDNode *I = SelectIntImmediateExpr(N->getOperand(0),
N->getOperand(1),
- PPC::XORIS, PPC::XORI)) {
- CurDAG->ReplaceAllUsesWith(N, I);
- N = I;
- break;
- }
- // Finally, check for the case where we are being asked to select
- // xor (not(a), b) which is equivalent to not(xor a, b), which is eqv
- if (isOprNot(N->getOperand(0).Val))
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::EQV,
- Select(N->getOperand(0).getOperand(0)),
- Select(N->getOperand(1)));
- else
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::XOR, Select(N->getOperand(0)),
- Select(N->getOperand(1)));
+ PPC::ORIS, PPC::ORI))
+ return CodeGenMap[Op] = SDOperand(I, 0);
+
+ // Other cases are autogenerated.
break;
case ISD::SHL: {
unsigned Imm, SH, MB, ME;
if (isOpcWithIntImmediate(N->getOperand(0).Val, ISD::AND, Imm) &&
isRotateAndMask(N, Imm, true, SH, MB, ME))
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::RLWINM,
+ CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32,
Select(N->getOperand(0).getOperand(0)),
getI32Imm(SH), getI32Imm(MB), getI32Imm(ME));
else if (isIntImmediate(N->getOperand(1), Imm))
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::RLWINM, Select(N->getOperand(0)),
+ CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Select(N->getOperand(0)),
getI32Imm(Imm), getI32Imm(0), getI32Imm(31-Imm));
else
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::SLW, Select(N->getOperand(0)),
+ CurDAG->SelectNodeTo(N, PPC::SLW, MVT::i32, Select(N->getOperand(0)),
Select(N->getOperand(1)));
- break;
+ return SDOperand(N, 0);
}
case ISD::SRL: {
unsigned Imm, SH, MB, ME;
if (isOpcWithIntImmediate(N->getOperand(0).Val, ISD::AND, Imm) &&
isRotateAndMask(N, Imm, true, SH, MB, ME))
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::RLWINM,
+ CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32,
Select(N->getOperand(0).getOperand(0)),
- getI32Imm(SH), getI32Imm(MB), getI32Imm(ME));
+ getI32Imm(SH & 0x1F), getI32Imm(MB), getI32Imm(ME));
else if (isIntImmediate(N->getOperand(1), Imm))
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::RLWINM, Select(N->getOperand(0)),
- getI32Imm(32-Imm), getI32Imm(Imm), getI32Imm(31));
+ CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Select(N->getOperand(0)),
+ getI32Imm((32-Imm) & 0x1F), getI32Imm(Imm),
+ getI32Imm(31));
else
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::SRW, Select(N->getOperand(0)),
+ CurDAG->SelectNodeTo(N, PPC::SRW, MVT::i32, Select(N->getOperand(0)),
Select(N->getOperand(1)));
- break;
+ return SDOperand(N, 0);
}
case ISD::SRA: {
unsigned Imm, SH, MB, ME;
- if (isOpcWithIntImmediate(N->getOperand(0).Val, ISD::AND, Imm) &&
+ if (0 &&isOpcWithIntImmediate(N->getOperand(0).Val, ISD::AND, Imm) &&
isRotateAndMask(N, Imm, true, SH, MB, ME))
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::RLWINM,
+ CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32,
Select(N->getOperand(0).getOperand(0)),
getI32Imm(SH), getI32Imm(MB), getI32Imm(ME));
else if (isIntImmediate(N->getOperand(1), Imm))
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::SRAWI, Select(N->getOperand(0)),
+ CurDAG->SelectNodeTo(N, PPC::SRAWI, MVT::i32, Select(N->getOperand(0)),
getI32Imm(Imm));
else
- CurDAG->SelectNodeTo(N, MVT::i32, PPC::SRAW, Select(N->getOperand(0)),
+ CurDAG->SelectNodeTo(N, PPC::SRAW, MVT::i32, Select(N->getOperand(0)),
Select(N->getOperand(1)));
- break;
+ return SDOperand(N, 0);
}
+ case ISD::FMUL: {
+ unsigned Opc = N->getValueType(0) == MVT::f32 ? PPC::FMULS : PPC::FMUL;
+ CurDAG->SelectNodeTo(N, Opc, N->getValueType(0), Select(N->getOperand(0)),
+ Select(N->getOperand(1)));
+ return SDOperand(N, 0);
+ }
+ case ISD::FDIV: {
+ unsigned Opc = N->getValueType(0) == MVT::f32 ? PPC::FDIVS : PPC::FDIV;
+ CurDAG->SelectNodeTo(N, Opc, N->getValueType(0), Select(N->getOperand(0)),
+ Select(N->getOperand(1)));
+ return SDOperand(N, 0);
+ }
case ISD::FABS:
- CurDAG->SelectNodeTo(N, N->getValueType(0), PPC::FABS,
- Select(N->getOperand(0)));
- break;
- case ISD::FP_EXTEND:
- assert(MVT::f64 == N->getValueType(0) &&
- MVT::f32 == N->getOperand(0).getValueType() && "Illegal FP_EXTEND");
- CurDAG->SelectNodeTo(N, MVT::f64, PPC::FMR, Select(N->getOperand(0)));
- break;
- case ISD::FP_ROUND:
- assert(MVT::f32 == N->getValueType(0) &&
- MVT::f64 == N->getOperand(0).getValueType() && "Illegal FP_ROUND");
- CurDAG->SelectNodeTo(N, MVT::f32, PPC::FRSP, Select(N->getOperand(0)));
- break;
+ if (N->getValueType(0) == MVT::f32)
+ CurDAG->SelectNodeTo(N, PPC::FABSS, MVT::f32, Select(N->getOperand(0)));
+ else
+ CurDAG->SelectNodeTo(N, PPC::FABSD, MVT::f64, Select(N->getOperand(0)));
+ return SDOperand(N, 0);
case ISD::FNEG: {
SDOperand Val = Select(N->getOperand(0));
MVT::ValueType Ty = N->getValueType(0);
if (Val.Val->hasOneUse()) {
unsigned Opc;
- switch (Val.getTargetOpcode()) {
+ switch (Val.isTargetOpcode() ? Val.getTargetOpcode() : 0) {
default: Opc = 0; break;
- case PPC::FABS: Opc = PPC::FNABS; break;
+ case PPC::FABSS: Opc = PPC::FNABSS; break;
+ case PPC::FABSD: Opc = PPC::FNABSD; break;
case PPC::FMADD: Opc = PPC::FNMADD; break;
case PPC::FMADDS: Opc = PPC::FNMADDS; break;
case PPC::FMSUB: Opc = PPC::FNMSUB; break;
// inverted opcode and the original instruction's operands. Otherwise,
// fall through and generate a fneg instruction.
if (Opc) {
- if (PPC::FNABS == Opc)
- CurDAG->SelectNodeTo(N, Ty, Opc, Val.getOperand(0));
+ if (Opc == PPC::FNABSS || Opc == PPC::FNABSD)
+ CurDAG->SelectNodeTo(N, Opc, Ty, Val.getOperand(0));
else
- CurDAG->SelectNodeTo(N, Ty, Opc, Val.getOperand(0),
+ CurDAG->SelectNodeTo(N, Opc, Ty, Val.getOperand(0),
Val.getOperand(1), Val.getOperand(2));
- break;
+ return SDOperand(N, 0);
}
}
- CurDAG->SelectNodeTo(N, Ty, PPC::FNEG, Val);
- break;
+ if (Ty == MVT::f32)
+ CurDAG->SelectNodeTo(N, PPC::FNEGS, MVT::f32, Val);
+ else
+ CurDAG->SelectNodeTo(N, PPC::FNEGD, MVT::f64, Val);
+ return SDOperand(N, 0);
}
case ISD::FSQRT: {
MVT::ValueType Ty = N->getValueType(0);
- CurDAG->SelectNodeTo(N, Ty, Ty == MVT::f64 ? PPC::FSQRT : PPC::FSQRTS,
+ CurDAG->SelectNodeTo(N, Ty == MVT::f64 ? PPC::FSQRT : PPC::FSQRTS, Ty,
Select(N->getOperand(0)));
- break;
+ return SDOperand(N, 0);
+ }
+ case ISD::LOAD:
+ case ISD::EXTLOAD:
+ case ISD::ZEXTLOAD:
+ case ISD::SEXTLOAD: {
+ SDOperand Op1, Op2;
+ bool isIdx = SelectAddr(N->getOperand(1), Op1, Op2);
+
+ MVT::ValueType TypeBeingLoaded = (N->getOpcode() == ISD::LOAD) ?
+ N->getValueType(0) : cast<VTSDNode>(N->getOperand(3))->getVT();
+ unsigned Opc;
+ switch (TypeBeingLoaded) {
+ default: N->dump(); assert(0 && "Cannot load this type!");
+ case MVT::i1:
+ case MVT::i8: Opc = isIdx ? PPC::LBZX : PPC::LBZ; break;
+ case MVT::i16:
+ if (N->getOpcode() == ISD::SEXTLOAD) { // SEXT load?
+ Opc = isIdx ? PPC::LHAX : PPC::LHA;
+ } else {
+ Opc = isIdx ? PPC::LHZX : PPC::LHZ;
+ }
+ break;
+ case MVT::i32: Opc = isIdx ? PPC::LWZX : PPC::LWZ; break;
+ case MVT::f32: Opc = isIdx ? PPC::LFSX : PPC::LFS; break;
+ case MVT::f64: Opc = isIdx ? PPC::LFDX : PPC::LFD; break;
+ }
+
+ // If this is an f32 -> f64 load, emit the f32 load, then use an 'extending
+ // copy'.
+ if (TypeBeingLoaded != MVT::f32 || N->getOpcode() == ISD::LOAD) {
+ CurDAG->SelectNodeTo(N, Opc, N->getValueType(0), MVT::Other,
+ Op1, Op2, Select(N->getOperand(0)));
+ return SDOperand(N, Op.ResNo);
+ } else {
+ std::vector<SDOperand> Ops;
+ Ops.push_back(Op1);
+ Ops.push_back(Op2);
+ Ops.push_back(Select(N->getOperand(0)));
+ SDOperand Res = CurDAG->getTargetNode(Opc, MVT::f32, MVT::Other, Ops);
+ SDOperand Ext = CurDAG->getTargetNode(PPC::FMRSD, MVT::f64, Res);
+ CodeGenMap[Op.getValue(0)] = Ext;
+ CodeGenMap[Op.getValue(1)] = Res.getValue(1);
+ if (Op.ResNo)
+ return Res.getValue(1);
+ else
+ return Ext;
+ }
+ }
+ case ISD::TRUNCSTORE:
+ case ISD::STORE: {
+ SDOperand AddrOp1, AddrOp2;
+ bool isIdx = SelectAddr(N->getOperand(2), AddrOp1, AddrOp2);
+
+ unsigned Opc;
+ if (N->getOpcode() == ISD::STORE) {
+ switch (N->getOperand(1).getValueType()) {
+ default: assert(0 && "unknown Type in store");
+ case MVT::i32: Opc = isIdx ? PPC::STWX : PPC::STW; break;
+ case MVT::f64: Opc = isIdx ? PPC::STFDX : PPC::STFD; break;
+ case MVT::f32: Opc = isIdx ? PPC::STFSX : PPC::STFS; break;
+ }
+ } else { //ISD::TRUNCSTORE
+ switch(cast<VTSDNode>(N->getOperand(4))->getVT()) {
+ default: assert(0 && "unknown Type in store");
+ case MVT::i8: Opc = isIdx ? PPC::STBX : PPC::STB; break;
+ case MVT::i16: Opc = isIdx ? PPC::STHX : PPC::STH; break;
+ }
+ }
+
+ CurDAG->SelectNodeTo(N, Opc, MVT::Other, Select(N->getOperand(1)),
+ AddrOp1, AddrOp2, Select(N->getOperand(0)));
+ return SDOperand(N, 0);
+ }
+
+ case ISD::SELECT_CC: {
+ ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(4))->get();
+
+ // handle the setcc cases here. select_cc lhs, 0, 1, 0, cc
+ if (ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N->getOperand(1)))
+ if (ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N->getOperand(2)))
+ if (ConstantSDNode *N3C = dyn_cast<ConstantSDNode>(N->getOperand(3)))
+ if (N1C->isNullValue() && N3C->isNullValue() &&
+ N2C->getValue() == 1ULL && CC == ISD::SETNE) {
+ SDOperand LHS = Select(N->getOperand(0));
+ SDOperand Tmp =
+ CurDAG->getTargetNode(PPC::ADDIC, MVT::i32, MVT::Flag,
+ LHS, getI32Imm(~0U));
+ CurDAG->SelectNodeTo(N, PPC::SUBFE, MVT::i32, Tmp, LHS,
+ Tmp.getValue(1));
+ return SDOperand(N, 0);
+ }
+
+ SDOperand CCReg = SelectCC(N->getOperand(0), N->getOperand(1), CC);
+ unsigned BROpc = getBCCForSetCC(CC);
+
+ bool isFP = MVT::isFloatingPoint(N->getValueType(0));
+ unsigned SelectCCOp;
+ if (MVT::isInteger(N->getValueType(0)))
+ SelectCCOp = PPC::SELECT_CC_Int;
+ else if (N->getValueType(0) == MVT::f32)
+ SelectCCOp = PPC::SELECT_CC_F4;
+ else
+ SelectCCOp = PPC::SELECT_CC_F8;
+ CurDAG->SelectNodeTo(N, SelectCCOp, N->getValueType(0), CCReg,
+ Select(N->getOperand(2)), Select(N->getOperand(3)),
+ getI32Imm(BROpc));
+ return SDOperand(N, 0);
+ }
+
+ case ISD::CALLSEQ_START:
+ case ISD::CALLSEQ_END: {
+ unsigned Amt = cast<ConstantSDNode>(N->getOperand(1))->getValue();
+ unsigned Opc = N->getOpcode() == ISD::CALLSEQ_START ?
+ PPC::ADJCALLSTACKDOWN : PPC::ADJCALLSTACKUP;
+ CurDAG->SelectNodeTo(N, Opc, MVT::Other,
+ getI32Imm(Amt), Select(N->getOperand(0)));
+ return SDOperand(N, 0);
}
case ISD::RET: {
SDOperand Chain = Select(N->getOperand(0)); // Token chain.
- if (N->getNumOperands() > 1) {
+ if (N->getNumOperands() == 2) {
SDOperand Val = Select(N->getOperand(1));
- switch (N->getOperand(1).getValueType()) {
- default: assert(0 && "Unknown return type!");
- case MVT::f64:
- case MVT::f32:
- Chain = CurDAG->getCopyToReg(Chain, PPC::F1, Val);
- break;
- case MVT::i32:
+ if (N->getOperand(1).getValueType() == MVT::i32) {
Chain = CurDAG->getCopyToReg(Chain, PPC::R3, Val);
- break;
- }
-
- if (N->getNumOperands() > 2) {
- assert(N->getOperand(1).getValueType() == MVT::i32 &&
- N->getOperand(2).getValueType() == MVT::i32 &&
- N->getNumOperands() == 2 && "Unknown two-register ret value!");
- Val = Select(N->getOperand(2));
- Chain = CurDAG->getCopyToReg(Chain, PPC::R4, Val);
+ } else {
+ assert(MVT::isFloatingPoint(N->getOperand(1).getValueType()));
+ Chain = CurDAG->getCopyToReg(Chain, PPC::F1, Val);
}
+ } else if (N->getNumOperands() > 1) {
+ assert(N->getOperand(1).getValueType() == MVT::i32 &&
+ N->getOperand(2).getValueType() == MVT::i32 &&
+ N->getNumOperands() == 3 && "Unknown two-register ret value!");
+ Chain = CurDAG->getCopyToReg(Chain, PPC::R4, Select(N->getOperand(1)));
+ Chain = CurDAG->getCopyToReg(Chain, PPC::R3, Select(N->getOperand(2)));
}
// Finally, select this to a blr (return) instruction.
- CurDAG->SelectNodeTo(N, MVT::Other, PPC::BLR, Chain);
- break;
+ CurDAG->SelectNodeTo(N, PPC::BLR, MVT::Other, Chain);
+ return SDOperand(N, 0);
}
+ case ISD::BR:
+ CurDAG->SelectNodeTo(N, PPC::B, MVT::Other, N->getOperand(1),
+ Select(N->getOperand(0)));
+ return SDOperand(N, 0);
+ case ISD::BR_CC:
+ case ISD::BRTWOWAY_CC: {
+ SDOperand Chain = Select(N->getOperand(0));
+ MachineBasicBlock *Dest =
+ cast<BasicBlockSDNode>(N->getOperand(4))->getBasicBlock();
+ ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(1))->get();
+ SDOperand CondCode = SelectCC(N->getOperand(2), N->getOperand(3), CC);
+
+ // If this is a two way branch, then grab the fallthrough basic block
+ // argument and build a PowerPC branch pseudo-op, suitable for long branch
+ // conversion if necessary by the branch selection pass. Otherwise, emit a
+ // standard conditional branch.
+ if (N->getOpcode() == ISD::BRTWOWAY_CC) {
+ SDOperand CondTrueBlock = N->getOperand(4);
+ SDOperand CondFalseBlock = N->getOperand(5);
+
+ // If the false case is the current basic block, then this is a self loop.
+ // We do not want to emit "Loop: ... brcond Out; br Loop", as it adds an
+ // extra dispatch group to the loop. Instead, invert the condition and
+ // emit "Loop: ... br!cond Loop; br Out
+ if (cast<BasicBlockSDNode>(CondFalseBlock)->getBasicBlock() == BB) {
+ std::swap(CondTrueBlock, CondFalseBlock);
+ CC = getSetCCInverse(CC,
+ MVT::isInteger(N->getOperand(2).getValueType()));
+ }
+
+ unsigned Opc = getBCCForSetCC(CC);
+ SDOperand CB = CurDAG->getTargetNode(PPC::COND_BRANCH, MVT::Other,
+ CondCode, getI32Imm(Opc),
+ CondTrueBlock, CondFalseBlock,
+ Chain);
+ CurDAG->SelectNodeTo(N, PPC::B, MVT::Other, CondFalseBlock, CB);
+ } else {
+ // Iterate to the next basic block
+ ilist<MachineBasicBlock>::iterator It = BB;
+ ++It;
+
+ // If the fallthrough path is off the end of the function, which would be
+ // undefined behavior, set it to be the same as the current block because
+ // we have nothing better to set it to, and leaving it alone will cause
+ // the PowerPC Branch Selection pass to crash.
+ if (It == BB->getParent()->end()) It = Dest;
+ CurDAG->SelectNodeTo(N, PPC::COND_BRANCH, MVT::Other, CondCode,
+ getI32Imm(getBCCForSetCC(CC)), N->getOperand(4),
+ CurDAG->getBasicBlock(It), Chain);
+ }
+ return SDOperand(N, 0);
}
- return SDOperand(N, 0);
+ }
+
+ return SelectCode(Op);
}
projects / oota-llvm.git / blobdiff