-//===-- SparcV8ISelDAGToDAG.cpp - A dag to dag inst selector for SparcV8 --===//
+//===-- SparcISelDAGToDAG.cpp - A dag to dag inst selector for Sparc ------===//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
//
-// This file defines an instruction selector for the V8 target
+// This file defines an instruction selector for the SPARC target.
//
//===----------------------------------------------------------------------===//
-#include "SparcV8.h"
-#include "SparcV8TargetMachine.h"
+#include "Sparc.h"
+#include "SparcTargetMachine.h"
+#include "llvm/DerivedTypes.h"
#include "llvm/Function.h"
+#include "llvm/Intrinsics.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/SelectionDAGISel.h"
#include "llvm/CodeGen/SSARegMap.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Support/Debug.h"
#include <iostream>
+#include <set>
using namespace llvm;
//===----------------------------------------------------------------------===//
// TargetLowering Implementation
//===----------------------------------------------------------------------===//
+namespace SPISD {
+ enum {
+ FIRST_NUMBER = ISD::BUILTIN_OP_END+SP::INSTRUCTION_LIST_END,
+ CMPICC, // Compare two GPR operands, set icc.
+ CMPFCC, // Compare two FP operands, set fcc.
+ BRICC, // Branch to dest on icc condition
+ BRFCC, // Branch to dest on fcc condition
+ SELECT_ICC, // Select between two values using the current ICC flags.
+ SELECT_FCC, // Select between two values using the current FCC flags.
+
+ Hi, Lo, // Hi/Lo operations, typically on a global address.
+
+ FTOI, // FP to Int within a FP register.
+ ITOF, // Int to FP within a FP register.
+
+ CALL, // A call instruction.
+ RET_FLAG, // Return with a flag operand.
+ };
+}
+
+/// IntCondCCodeToICC - Convert a DAG integer condition code to a SPARC ICC
+/// condition.
+static SPCC::CondCodes IntCondCCodeToICC(ISD::CondCode CC) {
+ switch (CC) {
+ default: assert(0 && "Unknown integer condition code!");
+ case ISD::SETEQ: return SPCC::ICC_E;
+ case ISD::SETNE: return SPCC::ICC_NE;
+ case ISD::SETLT: return SPCC::ICC_L;
+ case ISD::SETGT: return SPCC::ICC_G;
+ case ISD::SETLE: return SPCC::ICC_LE;
+ case ISD::SETGE: return SPCC::ICC_GE;
+ case ISD::SETULT: return SPCC::ICC_CS;
+ case ISD::SETULE: return SPCC::ICC_LEU;
+ case ISD::SETUGT: return SPCC::ICC_GU;
+ case ISD::SETUGE: return SPCC::ICC_CC;
+ }
+}
+
+/// FPCondCCodeToFCC - Convert a DAG floatingp oint condition code to a SPARC
+/// FCC condition.
+static SPCC::CondCodes FPCondCCodeToFCC(ISD::CondCode CC) {
+ switch (CC) {
+ default: assert(0 && "Unknown fp condition code!");
+ case ISD::SETEQ: return SPCC::FCC_E;
+ case ISD::SETNE: return SPCC::FCC_NE;
+ case ISD::SETLT: return SPCC::FCC_L;
+ case ISD::SETGT: return SPCC::FCC_G;
+ case ISD::SETLE: return SPCC::FCC_LE;
+ case ISD::SETGE: return SPCC::FCC_GE;
+ case ISD::SETULT: return SPCC::FCC_UL;
+ case ISD::SETULE: return SPCC::FCC_ULE;
+ case ISD::SETUGT: return SPCC::FCC_UG;
+ case ISD::SETUGE: return SPCC::FCC_UGE;
+ case ISD::SETUO: return SPCC::FCC_U;
+ case ISD::SETO: return SPCC::FCC_O;
+ case ISD::SETONE: return SPCC::FCC_LG;
+ case ISD::SETUEQ: return SPCC::FCC_UE;
+ }
+}
+
namespace {
- class SparcV8TargetLowering : public TargetLowering {
+ class SparcTargetLowering : public TargetLowering {
+ int VarArgsFrameOffset; // Frame offset to start of varargs area.
public:
- SparcV8TargetLowering(TargetMachine &TM);
-
+ SparcTargetLowering(TargetMachine &TM);
+ virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG);
+
+ /// computeMaskedBitsForTargetNode - Determine which of the bits specified
+ /// in Mask are known to be either zero or one and return them in the
+ /// KnownZero/KnownOne bitsets.
+ virtual void computeMaskedBitsForTargetNode(const SDOperand Op,
+ uint64_t Mask,
+ uint64_t &KnownZero,
+ uint64_t &KnownOne,
+ unsigned Depth = 0) const;
+
virtual std::vector<SDOperand>
LowerArguments(Function &F, SelectionDAG &DAG);
virtual std::pair<SDOperand, SDOperand>
unsigned CC,
bool isTailCall, SDOperand Callee, ArgListTy &Args,
SelectionDAG &DAG);
+ virtual MachineBasicBlock *InsertAtEndOfBasicBlock(MachineInstr *MI,
+ MachineBasicBlock *MBB);
- virtual SDOperand LowerReturnTo(SDOperand Chain, SDOperand Op,
- SelectionDAG &DAG);
- virtual SDOperand LowerVAStart(SDOperand Chain, SDOperand VAListP,
- Value *VAListV, SelectionDAG &DAG);
- virtual std::pair<SDOperand,SDOperand>
- LowerVAArg(SDOperand Chain, SDOperand VAListP, Value *VAListV,
- const Type *ArgTy, SelectionDAG &DAG);
- virtual std::pair<SDOperand, SDOperand>
- LowerFrameReturnAddress(bool isFrameAddr, SDOperand Chain, unsigned Depth,
- SelectionDAG &DAG);
+ virtual const char *getTargetNodeName(unsigned Opcode) const;
};
}
-SparcV8TargetLowering::SparcV8TargetLowering(TargetMachine &TM)
+SparcTargetLowering::SparcTargetLowering(TargetMachine &TM)
: TargetLowering(TM) {
// Set up the register classes.
- addRegisterClass(MVT::i32, V8::IntRegsRegisterClass);
- addRegisterClass(MVT::f32, V8::FPRegsRegisterClass);
- addRegisterClass(MVT::f64, V8::DFPRegsRegisterClass);
+ addRegisterClass(MVT::i32, SP::IntRegsRegisterClass);
+ addRegisterClass(MVT::f32, SP::FPRegsRegisterClass);
+ addRegisterClass(MVT::f64, SP::DFPRegsRegisterClass);
+ // Custom legalize GlobalAddress nodes into LO/HI parts.
+ setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
+ setOperationAction(ISD::ConstantPool , MVT::i32, Custom);
+
// Sparc doesn't have sext_inreg, replace them with shl/sra
- setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Expand);
- setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Expand);
- setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
+ setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
+ setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Expand);
+ setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
// Sparc has no REM operation.
setOperationAction(ISD::UREM, MVT::i32, Expand);
setOperationAction(ISD::SREM, MVT::i32, Expand);
+
+ // Custom expand fp<->sint
+ setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
+ setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
+
+ // Expand fp<->uint
+ setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
+ setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand);
+
+ setOperationAction(ISD::BIT_CONVERT, MVT::f32, Expand);
+ setOperationAction(ISD::BIT_CONVERT, MVT::i32, Expand);
+
+ // Turn FP extload into load/fextend
+ setOperationAction(ISD::EXTLOAD, MVT::f32, Expand);
+
+ // Sparc has no select or setcc: expand to SELECT_CC.
+ setOperationAction(ISD::SELECT, MVT::i32, Expand);
+ setOperationAction(ISD::SELECT, MVT::f32, Expand);
+ setOperationAction(ISD::SELECT, MVT::f64, Expand);
+ setOperationAction(ISD::SETCC, MVT::i32, Expand);
+ setOperationAction(ISD::SETCC, MVT::f32, Expand);
+ setOperationAction(ISD::SETCC, MVT::f64, Expand);
+
+ // Sparc doesn't have BRCOND either, it has BR_CC.
+ setOperationAction(ISD::BRCOND, MVT::Other, Expand);
+ setOperationAction(ISD::BR_CC, MVT::i32, Custom);
+ setOperationAction(ISD::BR_CC, MVT::f32, Custom);
+ setOperationAction(ISD::BR_CC, MVT::f64, Custom);
+
+ setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
+ setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
+ setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
+
+ // SPARC has no intrinsics for these particular operations.
+ setOperationAction(ISD::MEMMOVE, MVT::Other, Expand);
+ setOperationAction(ISD::MEMSET, MVT::Other, Expand);
+ setOperationAction(ISD::MEMCPY, MVT::Other, Expand);
+
+ setOperationAction(ISD::FSIN , MVT::f64, Expand);
+ setOperationAction(ISD::FCOS , MVT::f64, Expand);
+ setOperationAction(ISD::FSIN , MVT::f32, Expand);
+ setOperationAction(ISD::FCOS , MVT::f32, Expand);
+ setOperationAction(ISD::CTPOP, MVT::i32, Expand);
+ setOperationAction(ISD::CTTZ , MVT::i32, Expand);
+ setOperationAction(ISD::CTLZ , MVT::i32, Expand);
+ setOperationAction(ISD::ROTL , MVT::i32, Expand);
+ setOperationAction(ISD::ROTR , MVT::i32, Expand);
+ setOperationAction(ISD::BSWAP, MVT::i32, Expand);
+ setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
+ setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
+
+ setOperationAction(ISD::SHL_PARTS, MVT::i32, Expand);
+ setOperationAction(ISD::SRA_PARTS, MVT::i32, Expand);
+ setOperationAction(ISD::SRL_PARTS, MVT::i32, Expand);
+
+ // We don't have line number support yet.
+ setOperationAction(ISD::LOCATION, MVT::Other, Expand);
+ setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
+ setOperationAction(ISD::DEBUG_LABEL, MVT::Other, Expand);
+
+ // RET must be custom lowered, to meet ABI requirements
+ setOperationAction(ISD::RET , MVT::Other, Custom);
+
+ // VASTART needs to be custom lowered to use the VarArgsFrameIndex.
+ setOperationAction(ISD::VASTART , MVT::Other, Custom);
+ // VAARG needs to be lowered to not do unaligned accesses for doubles.
+ setOperationAction(ISD::VAARG , MVT::Other, Custom);
+
+ // Use the default implementation.
+ setOperationAction(ISD::VACOPY , MVT::Other, Expand);
+ setOperationAction(ISD::VAEND , MVT::Other, Expand);
+ setOperationAction(ISD::STACKSAVE , MVT::Other, Expand);
+ setOperationAction(ISD::STACKRESTORE , MVT::Other, Expand);
+ setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Custom);
+
+ setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
+ setOperationAction(ISD::ConstantFP, MVT::f32, Expand);
+
+ setStackPointerRegisterToSaveRestore(SP::O6);
+
+ if (TM.getSubtarget<SparcSubtarget>().isV9()) {
+ setOperationAction(ISD::CTPOP, MVT::i32, Legal);
+ }
computeRegisterProperties();
}
+const char *SparcTargetLowering::getTargetNodeName(unsigned Opcode) const {
+ switch (Opcode) {
+ default: return 0;
+ case SPISD::CMPICC: return "SPISD::CMPICC";
+ case SPISD::CMPFCC: return "SPISD::CMPFCC";
+ case SPISD::BRICC: return "SPISD::BRICC";
+ case SPISD::BRFCC: return "SPISD::BRFCC";
+ case SPISD::SELECT_ICC: return "SPISD::SELECT_ICC";
+ case SPISD::SELECT_FCC: return "SPISD::SELECT_FCC";
+ case SPISD::Hi: return "SPISD::Hi";
+ case SPISD::Lo: return "SPISD::Lo";
+ case SPISD::FTOI: return "SPISD::FTOI";
+ case SPISD::ITOF: return "SPISD::ITOF";
+ case SPISD::CALL: return "SPISD::CALL";
+ case SPISD::RET_FLAG: return "SPISD::RET_FLAG";
+ }
+}
+
+/// isMaskedValueZeroForTargetNode - Return true if 'Op & Mask' is known to
+/// be zero. Op is expected to be a target specific node. Used by DAG
+/// combiner.
+void SparcTargetLowering::computeMaskedBitsForTargetNode(const SDOperand Op,
+ uint64_t Mask,
+ uint64_t &KnownZero,
+ uint64_t &KnownOne,
+ unsigned Depth) const {
+ uint64_t KnownZero2, KnownOne2;
+ KnownZero = KnownOne = 0; // Don't know anything.
+
+ switch (Op.getOpcode()) {
+ default: break;
+ case SPISD::SELECT_ICC:
+ case SPISD::SELECT_FCC:
+ ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero, KnownOne, Depth+1);
+ ComputeMaskedBits(Op.getOperand(0), Mask, KnownZero2, KnownOne2, Depth+1);
+ assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
+ assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
+
+ // Only known if known in both the LHS and RHS.
+ KnownOne &= KnownOne2;
+ KnownZero &= KnownZero2;
+ break;
+ }
+}
+
+/// LowerArguments - V8 uses a very simple ABI, where all values are passed in
+/// either one or two GPRs, including FP values. TODO: we should pass FP values
+/// in FP registers for fastcc functions.
std::vector<SDOperand>
-SparcV8TargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
+SparcTargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
MachineFunction &MF = DAG.getMachineFunction();
SSARegMap *RegMap = MF.getSSARegMap();
std::vector<SDOperand> ArgValues;
- static const unsigned GPR[] = {
- V8::I0, V8::I1, V8::I2, V8::I3, V8::I4, V8::I5
+ static const unsigned ArgRegs[] = {
+ SP::I0, SP::I1, SP::I2, SP::I3, SP::I4, SP::I5
};
- unsigned ArgNo = 0;
+
+ const unsigned *CurArgReg = ArgRegs, *ArgRegEnd = ArgRegs+6;
+ unsigned ArgOffset = 68;
+
+ SDOperand Root = DAG.getRoot();
+ std::vector<SDOperand> OutChains;
+
for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I) {
MVT::ValueType ObjectVT = getValueType(I->getType());
- assert(ArgNo < 6 && "Only args in regs for now");
switch (ObjectVT) {
default: assert(0 && "Unhandled argument type!");
- // TODO: MVT::i64 & FP
case MVT::i1:
case MVT::i8:
case MVT::i16:
- case MVT::i32: {
- unsigned VReg = RegMap->createVirtualRegister(&V8::IntRegsRegClass);
- MF.addLiveIn(GPR[ArgNo++], VReg);
- SDOperand Arg = DAG.getCopyFromReg(DAG.getRoot(), VReg, MVT::i32);
- DAG.setRoot(Arg.getValue(1));
- if (ObjectVT != MVT::i32) {
- unsigned AssertOp = I->getType()->isSigned() ? ISD::AssertSext
- : ISD::AssertZext;
- Arg = DAG.getNode(AssertOp, MVT::i32, Arg,
- DAG.getValueType(ObjectVT));
- Arg = DAG.getNode(ISD::TRUNCATE, ObjectVT, Arg);
+ case MVT::i32:
+ if (I->use_empty()) { // Argument is dead.
+ if (CurArgReg < ArgRegEnd) ++CurArgReg;
+ ArgValues.push_back(DAG.getNode(ISD::UNDEF, ObjectVT));
+ } else if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
+ unsigned VReg = RegMap->createVirtualRegister(&SP::IntRegsRegClass);
+ MF.addLiveIn(*CurArgReg++, VReg);
+ SDOperand Arg = DAG.getCopyFromReg(Root, VReg, MVT::i32);
+ if (ObjectVT != MVT::i32) {
+ unsigned AssertOp = I->getType()->isSigned() ? ISD::AssertSext
+ : ISD::AssertZext;
+ Arg = DAG.getNode(AssertOp, MVT::i32, Arg,
+ DAG.getValueType(ObjectVT));
+ Arg = DAG.getNode(ISD::TRUNCATE, ObjectVT, Arg);
+ }
+ ArgValues.push_back(Arg);
+ } else {
+ int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset);
+ SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
+ SDOperand Load;
+ if (ObjectVT == MVT::i32) {
+ Load = DAG.getLoad(MVT::i32, Root, FIPtr, DAG.getSrcValue(0));
+ } else {
+ unsigned LoadOp =
+ I->getType()->isSigned() ? ISD::SEXTLOAD : ISD::ZEXTLOAD;
+
+ // Sparc is big endian, so add an offset based on the ObjectVT.
+ unsigned Offset = 4-std::max(1U, MVT::getSizeInBits(ObjectVT)/8);
+ FIPtr = DAG.getNode(ISD::ADD, MVT::i32, FIPtr,
+ DAG.getConstant(Offset, MVT::i32));
+ Load = DAG.getExtLoad(LoadOp, MVT::i32, Root, FIPtr,
+ DAG.getSrcValue(0), ObjectVT);
+ Load = DAG.getNode(ISD::TRUNCATE, ObjectVT, Load);
+ }
+ ArgValues.push_back(Load);
}
- ArgValues.push_back(Arg);
+
+ ArgOffset += 4;
break;
- }
- case MVT::i64: {
- unsigned VRegHi = RegMap->createVirtualRegister(&V8::IntRegsRegClass);
- MF.addLiveIn(GPR[ArgNo++], VRegHi);
- unsigned VRegLo = RegMap->createVirtualRegister(&V8::IntRegsRegClass);
- MF.addLiveIn(GPR[ArgNo++], VRegLo);
- SDOperand ArgLo = DAG.getCopyFromReg(DAG.getRoot(), VRegLo, MVT::i32);
- SDOperand ArgHi = DAG.getCopyFromReg(ArgLo.getValue(1), VRegHi, MVT::i32);
- DAG.setRoot(ArgHi.getValue(1));
- ArgValues.push_back(DAG.getNode(ISD::BUILD_PAIR, MVT::i64, ArgLo, ArgHi));
+ case MVT::f32:
+ if (I->use_empty()) { // Argument is dead.
+ if (CurArgReg < ArgRegEnd) ++CurArgReg;
+ ArgValues.push_back(DAG.getNode(ISD::UNDEF, ObjectVT));
+ } else if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
+ // FP value is passed in an integer register.
+ unsigned VReg = RegMap->createVirtualRegister(&SP::IntRegsRegClass);
+ MF.addLiveIn(*CurArgReg++, VReg);
+ SDOperand Arg = DAG.getCopyFromReg(Root, VReg, MVT::i32);
+
+ Arg = DAG.getNode(ISD::BIT_CONVERT, MVT::f32, Arg);
+ ArgValues.push_back(Arg);
+ } else {
+ int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset);
+ SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
+ SDOperand Load = DAG.getLoad(MVT::f32, Root, FIPtr, DAG.getSrcValue(0));
+ ArgValues.push_back(Load);
+ }
+ ArgOffset += 4;
+ break;
+
+ case MVT::i64:
+ case MVT::f64:
+ if (I->use_empty()) { // Argument is dead.
+ if (CurArgReg < ArgRegEnd) ++CurArgReg;
+ if (CurArgReg < ArgRegEnd) ++CurArgReg;
+ ArgValues.push_back(DAG.getNode(ISD::UNDEF, ObjectVT));
+ } else if (/* FIXME: Apparently this isn't safe?? */
+ 0 && CurArgReg == ArgRegEnd && ObjectVT == MVT::f64 &&
+ ((CurArgReg-ArgRegs) & 1) == 0) {
+ // If this is a double argument and the whole thing lives on the stack,
+ // and the argument is aligned, load the double straight from the stack.
+ // We can't do a load in cases like void foo([6ints], int,double),
+ // because the double wouldn't be aligned!
+ int FrameIdx = MF.getFrameInfo()->CreateFixedObject(8, ArgOffset);
+ SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
+ ArgValues.push_back(DAG.getLoad(MVT::f64, Root, FIPtr,
+ DAG.getSrcValue(0)));
+ } else {
+ SDOperand HiVal;
+ if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
+ unsigned VRegHi = RegMap->createVirtualRegister(&SP::IntRegsRegClass);
+ MF.addLiveIn(*CurArgReg++, VRegHi);
+ HiVal = DAG.getCopyFromReg(Root, VRegHi, MVT::i32);
+ } else {
+ int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset);
+ SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
+ HiVal = DAG.getLoad(MVT::i32, Root, FIPtr, DAG.getSrcValue(0));
+ }
+
+ SDOperand LoVal;
+ if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
+ unsigned VRegLo = RegMap->createVirtualRegister(&SP::IntRegsRegClass);
+ MF.addLiveIn(*CurArgReg++, VRegLo);
+ LoVal = DAG.getCopyFromReg(Root, VRegLo, MVT::i32);
+ } else {
+ int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset+4);
+ SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
+ LoVal = DAG.getLoad(MVT::i32, Root, FIPtr, DAG.getSrcValue(0));
+ }
+
+ // Compose the two halves together into an i64 unit.
+ SDOperand WholeValue =
+ DAG.getNode(ISD::BUILD_PAIR, MVT::i64, LoVal, HiVal);
+
+ // If we want a double, do a bit convert.
+ if (ObjectVT == MVT::f64)
+ WholeValue = DAG.getNode(ISD::BIT_CONVERT, MVT::f64, WholeValue);
+
+ ArgValues.push_back(WholeValue);
+ }
+ ArgOffset += 8;
break;
}
+ }
+
+ // Store remaining ArgRegs to the stack if this is a varargs function.
+ if (F.getFunctionType()->isVarArg()) {
+ // Remember the vararg offset for the va_start implementation.
+ VarArgsFrameOffset = ArgOffset;
+
+ for (; CurArgReg != ArgRegEnd; ++CurArgReg) {
+ unsigned VReg = RegMap->createVirtualRegister(&SP::IntRegsRegClass);
+ MF.addLiveIn(*CurArgReg, VReg);
+ SDOperand Arg = DAG.getCopyFromReg(DAG.getRoot(), VReg, MVT::i32);
+
+ int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset);
+ SDOperand FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
+
+ OutChains.push_back(DAG.getNode(ISD::STORE, MVT::Other, DAG.getRoot(),
+ Arg, FIPtr, DAG.getSrcValue(0)));
+ ArgOffset += 4;
}
}
- assert(!F.isVarArg() && "Unimp");
+ if (!OutChains.empty())
+ DAG.setRoot(DAG.getNode(ISD::TokenFactor, MVT::Other, OutChains));
// Finally, inform the code generator which regs we return values in.
switch (getValueType(F.getReturnType())) {
case MVT::i8:
case MVT::i16:
case MVT::i32:
- MF.addLiveOut(V8::I0);
+ MF.addLiveOut(SP::I0);
break;
case MVT::i64:
- MF.addLiveOut(V8::I0);
- MF.addLiveOut(V8::I1);
+ MF.addLiveOut(SP::I0);
+ MF.addLiveOut(SP::I1);
break;
case MVT::f32:
- MF.addLiveOut(V8::F0);
+ MF.addLiveOut(SP::F0);
break;
case MVT::f64:
- MF.addLiveOut(V8::D0);
+ MF.addLiveOut(SP::D0);
break;
}
}
std::pair<SDOperand, SDOperand>
-SparcV8TargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy,
- bool isVarArg, unsigned CC,
- bool isTailCall, SDOperand Callee,
- ArgListTy &Args, SelectionDAG &DAG) {
- assert(0 && "Unimp");
- abort();
-}
+SparcTargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy,
+ bool isVarArg, unsigned CC,
+ bool isTailCall, SDOperand Callee,
+ ArgListTy &Args, SelectionDAG &DAG) {
+ MachineFunction &MF = DAG.getMachineFunction();
+ // Count the size of the outgoing arguments.
+ unsigned ArgsSize = 0;
+ for (unsigned i = 0, e = Args.size(); i != e; ++i) {
+ switch (getValueType(Args[i].second)) {
+ default: assert(0 && "Unknown value type!");
+ case MVT::i1:
+ case MVT::i8:
+ case MVT::i16:
+ case MVT::i32:
+ case MVT::f32:
+ ArgsSize += 4;
+ break;
+ case MVT::i64:
+ case MVT::f64:
+ ArgsSize += 8;
+ break;
+ }
+ }
+ if (ArgsSize > 4*6)
+ ArgsSize -= 4*6; // Space for first 6 arguments is prereserved.
+ else
+ ArgsSize = 0;
+
+ // Keep stack frames 8-byte aligned.
+ ArgsSize = (ArgsSize+7) & ~7;
-SDOperand SparcV8TargetLowering::LowerReturnTo(SDOperand Chain, SDOperand Op,
- SelectionDAG &DAG) {
- if (Op.getValueType() == MVT::i64) {
- SDOperand Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32, Op,
- DAG.getConstant(1, MVT::i32));
- SDOperand Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32, Op,
- DAG.getConstant(0, MVT::i32));
- return DAG.getNode(ISD::RET, MVT::Other, Chain, Lo, Hi);
- } else {
- return DAG.getNode(ISD::RET, MVT::Other, Chain, Op);
+ Chain = DAG.getCALLSEQ_START(Chain,DAG.getConstant(ArgsSize, getPointerTy()));
+
+ SDOperand StackPtr, NullSV;
+ std::vector<SDOperand> Stores;
+ std::vector<SDOperand> RegValuesToPass;
+ unsigned ArgOffset = 68;
+ for (unsigned i = 0, e = Args.size(); i != e; ++i) {
+ SDOperand Val = Args[i].first;
+ MVT::ValueType ObjectVT = Val.getValueType();
+ SDOperand ValToStore(0, 0);
+ unsigned ObjSize;
+ switch (ObjectVT) {
+ default: assert(0 && "Unhandled argument type!");
+ case MVT::i1:
+ case MVT::i8:
+ case MVT::i16:
+ // Promote the integer to 32-bits. If the input type is signed, use a
+ // sign extend, otherwise use a zero extend.
+ if (Args[i].second->isSigned())
+ Val = DAG.getNode(ISD::SIGN_EXTEND, MVT::i32, Val);
+ else
+ Val = DAG.getNode(ISD::ZERO_EXTEND, MVT::i32, Val);
+ // FALL THROUGH
+ case MVT::i32:
+ ObjSize = 4;
+
+ if (RegValuesToPass.size() >= 6) {
+ ValToStore = Val;
+ } else {
+ RegValuesToPass.push_back(Val);
+ }
+ break;
+ case MVT::f32:
+ ObjSize = 4;
+ if (RegValuesToPass.size() >= 6) {
+ ValToStore = Val;
+ } else {
+ // Convert this to a FP value in an int reg.
+ Val = DAG.getNode(ISD::BIT_CONVERT, MVT::i32, Val);
+ RegValuesToPass.push_back(Val);
+ }
+ break;
+ case MVT::f64:
+ ObjSize = 8;
+ // If we can store this directly into the outgoing slot, do so. We can
+ // do this when all ArgRegs are used and if the outgoing slot is aligned.
+ // FIXME: McGill/misr fails with this.
+ if (0 && RegValuesToPass.size() >= 6 && ((ArgOffset-68) & 7) == 0) {
+ ValToStore = Val;
+ break;
+ }
+
+ // Otherwise, convert this to a FP value in int regs.
+ Val = DAG.getNode(ISD::BIT_CONVERT, MVT::i64, Val);
+ // FALL THROUGH
+ case MVT::i64:
+ ObjSize = 8;
+ if (RegValuesToPass.size() >= 6) {
+ ValToStore = Val; // Whole thing is passed in memory.
+ break;
+ }
+
+ // Split the value into top and bottom part. Top part goes in a reg.
+ SDOperand Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32, Val,
+ DAG.getConstant(1, MVT::i32));
+ SDOperand Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32, Val,
+ DAG.getConstant(0, MVT::i32));
+ RegValuesToPass.push_back(Hi);
+
+ if (RegValuesToPass.size() >= 6) {
+ ValToStore = Lo;
+ ArgOffset += 4;
+ ObjSize = 4;
+ } else {
+ RegValuesToPass.push_back(Lo);
+ }
+ break;
+ }
+
+ if (ValToStore.Val) {
+ if (!StackPtr.Val) {
+ StackPtr = DAG.getRegister(SP::O6, MVT::i32);
+ NullSV = DAG.getSrcValue(NULL);
+ }
+ SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
+ PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
+ Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
+ ValToStore, PtrOff, NullSV));
+ }
+ ArgOffset += ObjSize;
}
-}
+
+ // Emit all stores, make sure the occur before any copies into physregs.
+ if (!Stores.empty())
+ Chain = DAG.getNode(ISD::TokenFactor, MVT::Other, Stores);
+
+ static const unsigned ArgRegs[] = {
+ SP::O0, SP::O1, SP::O2, SP::O3, SP::O4, SP::O5
+ };
+
+ // Build a sequence of copy-to-reg nodes chained together with token chain
+ // and flag operands which copy the outgoing args into O[0-5].
+ SDOperand InFlag;
+ for (unsigned i = 0, e = RegValuesToPass.size(); i != e; ++i) {
+ Chain = DAG.getCopyToReg(Chain, ArgRegs[i], RegValuesToPass[i], InFlag);
+ InFlag = Chain.getValue(1);
+ }
+
+ // If the callee is a GlobalAddress node (quite common, every direct call is)
+ // turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
+ // Likewise ExternalSymbol -> TargetExternalSymbol.
+ if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
+ Callee = DAG.getTargetGlobalAddress(G->getGlobal(), MVT::i32);
+ else if (ExternalSymbolSDNode *E = dyn_cast<ExternalSymbolSDNode>(Callee))
+ Callee = DAG.getTargetExternalSymbol(E->getSymbol(), MVT::i32);
-SDOperand SparcV8TargetLowering::LowerVAStart(SDOperand Chain, SDOperand VAListP,
- Value *VAListV, SelectionDAG &DAG) {
- assert(0 && "Unimp");
- abort();
+ std::vector<MVT::ValueType> NodeTys;
+ NodeTys.push_back(MVT::Other); // Returns a chain
+ NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
+ std::vector<SDOperand> Ops;
+ Ops.push_back(Chain);
+ Ops.push_back(Callee);
+ if (InFlag.Val)
+ Ops.push_back(InFlag);
+ Chain = DAG.getNode(SPISD::CALL, NodeTys, Ops);
+ InFlag = Chain.getValue(1);
+
+ MVT::ValueType RetTyVT = getValueType(RetTy);
+ SDOperand RetVal;
+ if (RetTyVT != MVT::isVoid) {
+ switch (RetTyVT) {
+ default: assert(0 && "Unknown value type to return!");
+ case MVT::i1:
+ case MVT::i8:
+ case MVT::i16:
+ RetVal = DAG.getCopyFromReg(Chain, SP::O0, MVT::i32, InFlag);
+ Chain = RetVal.getValue(1);
+
+ // Add a note to keep track of whether it is sign or zero extended.
+ RetVal = DAG.getNode(RetTy->isSigned() ? ISD::AssertSext :ISD::AssertZext,
+ MVT::i32, RetVal, DAG.getValueType(RetTyVT));
+ RetVal = DAG.getNode(ISD::TRUNCATE, RetTyVT, RetVal);
+ break;
+ case MVT::i32:
+ RetVal = DAG.getCopyFromReg(Chain, SP::O0, MVT::i32, InFlag);
+ Chain = RetVal.getValue(1);
+ break;
+ case MVT::f32:
+ RetVal = DAG.getCopyFromReg(Chain, SP::F0, MVT::f32, InFlag);
+ Chain = RetVal.getValue(1);
+ break;
+ case MVT::f64:
+ RetVal = DAG.getCopyFromReg(Chain, SP::D0, MVT::f64, InFlag);
+ Chain = RetVal.getValue(1);
+ break;
+ case MVT::i64:
+ SDOperand Lo = DAG.getCopyFromReg(Chain, SP::O1, MVT::i32, InFlag);
+ SDOperand Hi = DAG.getCopyFromReg(Lo.getValue(1), SP::O0, MVT::i32,
+ Lo.getValue(2));
+ RetVal = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, Lo, Hi);
+ Chain = Hi.getValue(1);
+ break;
+ }
+ }
+
+ Chain = DAG.getNode(ISD::CALLSEQ_END, MVT::Other, Chain,
+ DAG.getConstant(ArgsSize, getPointerTy()));
+
+ return std::make_pair(RetVal, Chain);
}
-std::pair<SDOperand,SDOperand>
-SparcV8TargetLowering::LowerVAArg(SDOperand Chain, SDOperand VAListP, Value *VAListV,
- const Type *ArgTy, SelectionDAG &DAG) {
- assert(0 && "Unimp");
- abort();
+// Look at LHS/RHS/CC and see if they are a lowered setcc instruction. If so
+// set LHS/RHS and SPCC to the LHS/RHS of the setcc and SPCC to the condition.
+static void LookThroughSetCC(SDOperand &LHS, SDOperand &RHS,
+ ISD::CondCode CC, unsigned &SPCC) {
+ if (isa<ConstantSDNode>(RHS) && cast<ConstantSDNode>(RHS)->getValue() == 0 &&
+ CC == ISD::SETNE &&
+ ((LHS.getOpcode() == SPISD::SELECT_ICC &&
+ LHS.getOperand(3).getOpcode() == SPISD::CMPICC) ||
+ (LHS.getOpcode() == SPISD::SELECT_FCC &&
+ LHS.getOperand(3).getOpcode() == SPISD::CMPFCC)) &&
+ isa<ConstantSDNode>(LHS.getOperand(0)) &&
+ isa<ConstantSDNode>(LHS.getOperand(1)) &&
+ cast<ConstantSDNode>(LHS.getOperand(0))->getValue() == 1 &&
+ cast<ConstantSDNode>(LHS.getOperand(1))->getValue() == 0) {
+ SDOperand CMPCC = LHS.getOperand(3);
+ SPCC = cast<ConstantSDNode>(LHS.getOperand(2))->getValue();
+ LHS = CMPCC.getOperand(0);
+ RHS = CMPCC.getOperand(1);
+ }
}
-std::pair<SDOperand, SDOperand>
-SparcV8TargetLowering::LowerFrameReturnAddress(bool isFrameAddr, SDOperand Chain, unsigned Depth,
- SelectionDAG &DAG) {
- assert(0 && "Unimp");
- abort();
+
+SDOperand SparcTargetLowering::
+LowerOperation(SDOperand Op, SelectionDAG &DAG) {
+ switch (Op.getOpcode()) {
+ default: assert(0 && "Should not custom lower this!");
+ case ISD::GlobalAddress: {
+ GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
+ SDOperand GA = DAG.getTargetGlobalAddress(GV, MVT::i32);
+ SDOperand Hi = DAG.getNode(SPISD::Hi, MVT::i32, GA);
+ SDOperand Lo = DAG.getNode(SPISD::Lo, MVT::i32, GA);
+ return DAG.getNode(ISD::ADD, MVT::i32, Lo, Hi);
+ }
+ case ISD::ConstantPool: {
+ Constant *C = cast<ConstantPoolSDNode>(Op)->get();
+ SDOperand CP = DAG.getTargetConstantPool(C, MVT::i32,
+ cast<ConstantPoolSDNode>(Op)->getAlignment());
+ SDOperand Hi = DAG.getNode(SPISD::Hi, MVT::i32, CP);
+ SDOperand Lo = DAG.getNode(SPISD::Lo, MVT::i32, CP);
+ return DAG.getNode(ISD::ADD, MVT::i32, Lo, Hi);
+ }
+ case ISD::FP_TO_SINT:
+ // Convert the fp value to integer in an FP register.
+ assert(Op.getValueType() == MVT::i32);
+ Op = DAG.getNode(SPISD::FTOI, MVT::f32, Op.getOperand(0));
+ return DAG.getNode(ISD::BIT_CONVERT, MVT::i32, Op);
+ case ISD::SINT_TO_FP: {
+ assert(Op.getOperand(0).getValueType() == MVT::i32);
+ SDOperand Tmp = DAG.getNode(ISD::BIT_CONVERT, MVT::f32, Op.getOperand(0));
+ // Convert the int value to FP in an FP register.
+ return DAG.getNode(SPISD::ITOF, Op.getValueType(), Tmp);
+ }
+ case ISD::BR_CC: {
+ SDOperand Chain = Op.getOperand(0);
+ ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
+ SDOperand LHS = Op.getOperand(2);
+ SDOperand RHS = Op.getOperand(3);
+ SDOperand Dest = Op.getOperand(4);
+ unsigned Opc, SPCC = ~0U;
+
+ // If this is a br_cc of a "setcc", and if the setcc got lowered into
+ // an CMP[IF]CC/SELECT_[IF]CC pair, find the original compared values.
+ LookThroughSetCC(LHS, RHS, CC, SPCC);
+
+ // Get the condition flag.
+ SDOperand CompareFlag;
+ if (LHS.getValueType() == MVT::i32) {
+ std::vector<MVT::ValueType> VTs;
+ VTs.push_back(MVT::i32);
+ VTs.push_back(MVT::Flag);
+ std::vector<SDOperand> Ops;
+ Ops.push_back(LHS);
+ Ops.push_back(RHS);
+ CompareFlag = DAG.getNode(SPISD::CMPICC, VTs, Ops).getValue(1);
+ if (SPCC == ~0U) SPCC = IntCondCCodeToICC(CC);
+ Opc = SPISD::BRICC;
+ } else {
+ CompareFlag = DAG.getNode(SPISD::CMPFCC, MVT::Flag, LHS, RHS);
+ if (SPCC == ~0U) SPCC = FPCondCCodeToFCC(CC);
+ Opc = SPISD::BRFCC;
+ }
+ return DAG.getNode(Opc, MVT::Other, Chain, Dest,
+ DAG.getConstant(SPCC, MVT::i32), CompareFlag);
+ }
+ case ISD::SELECT_CC: {
+ SDOperand LHS = Op.getOperand(0);
+ SDOperand RHS = Op.getOperand(1);
+ ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
+ SDOperand TrueVal = Op.getOperand(2);
+ SDOperand FalseVal = Op.getOperand(3);
+ unsigned Opc, SPCC = ~0U;
+
+ // If this is a select_cc of a "setcc", and if the setcc got lowered into
+ // an CMP[IF]CC/SELECT_[IF]CC pair, find the original compared values.
+ LookThroughSetCC(LHS, RHS, CC, SPCC);
+
+ SDOperand CompareFlag;
+ if (LHS.getValueType() == MVT::i32) {
+ std::vector<MVT::ValueType> VTs;
+ VTs.push_back(LHS.getValueType()); // subcc returns a value
+ VTs.push_back(MVT::Flag);
+ std::vector<SDOperand> Ops;
+ Ops.push_back(LHS);
+ Ops.push_back(RHS);
+ CompareFlag = DAG.getNode(SPISD::CMPICC, VTs, Ops).getValue(1);
+ Opc = SPISD::SELECT_ICC;
+ if (SPCC == ~0U) SPCC = IntCondCCodeToICC(CC);
+ } else {
+ CompareFlag = DAG.getNode(SPISD::CMPFCC, MVT::Flag, LHS, RHS);
+ Opc = SPISD::SELECT_FCC;
+ if (SPCC == ~0U) SPCC = FPCondCCodeToFCC(CC);
+ }
+ return DAG.getNode(Opc, TrueVal.getValueType(), TrueVal, FalseVal,
+ DAG.getConstant(SPCC, MVT::i32), CompareFlag);
+ }
+ case ISD::VASTART: {
+ // vastart just stores the address of the VarArgsFrameIndex slot into the
+ // memory location argument.
+ SDOperand Offset = DAG.getNode(ISD::ADD, MVT::i32,
+ DAG.getRegister(SP::I6, MVT::i32),
+ DAG.getConstant(VarArgsFrameOffset, MVT::i32));
+ return DAG.getNode(ISD::STORE, MVT::Other, Op.getOperand(0), Offset,
+ Op.getOperand(1), Op.getOperand(2));
+ }
+ case ISD::VAARG: {
+ SDNode *Node = Op.Val;
+ MVT::ValueType VT = Node->getValueType(0);
+ SDOperand InChain = Node->getOperand(0);
+ SDOperand VAListPtr = Node->getOperand(1);
+ SDOperand VAList = DAG.getLoad(getPointerTy(), InChain, VAListPtr,
+ Node->getOperand(2));
+ // Increment the pointer, VAList, to the next vaarg
+ SDOperand NextPtr = DAG.getNode(ISD::ADD, getPointerTy(), VAList,
+ DAG.getConstant(MVT::getSizeInBits(VT)/8,
+ getPointerTy()));
+ // Store the incremented VAList to the legalized pointer
+ InChain = DAG.getNode(ISD::STORE, MVT::Other, VAList.getValue(1), NextPtr,
+ VAListPtr, Node->getOperand(2));
+ // Load the actual argument out of the pointer VAList, unless this is an
+ // f64 load.
+ if (VT != MVT::f64) {
+ return DAG.getLoad(VT, InChain, VAList, DAG.getSrcValue(0));
+ } else {
+ // Otherwise, load it as i64, then do a bitconvert.
+ SDOperand V = DAG.getLoad(MVT::i64, InChain, VAList, DAG.getSrcValue(0));
+ std::vector<MVT::ValueType> Tys;
+ Tys.push_back(MVT::f64);
+ Tys.push_back(MVT::Other);
+ std::vector<SDOperand> Ops;
+ // Bit-Convert the value to f64.
+ Ops.push_back(DAG.getNode(ISD::BIT_CONVERT, MVT::f64, V));
+ Ops.push_back(V.getValue(1));
+ return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops);
+ }
+ }
+ case ISD::DYNAMIC_STACKALLOC: {
+ SDOperand Chain = Op.getOperand(0); // Legalize the chain.
+ SDOperand Size = Op.getOperand(1); // Legalize the size.
+
+ unsigned SPReg = SP::O6;
+ SDOperand SP = DAG.getCopyFromReg(Chain, SPReg, MVT::i32);
+ SDOperand NewSP = DAG.getNode(ISD::SUB, MVT::i32, SP, Size); // Value
+ Chain = DAG.getCopyToReg(SP.getValue(1), SPReg, NewSP); // Output chain
+
+ // The resultant pointer is actually 16 words from the bottom of the stack,
+ // to provide a register spill area.
+ SDOperand NewVal = DAG.getNode(ISD::ADD, MVT::i32, NewSP,
+ DAG.getConstant(96, MVT::i32));
+ std::vector<MVT::ValueType> Tys;
+ Tys.push_back(MVT::i32);
+ Tys.push_back(MVT::Other);
+ std::vector<SDOperand> Ops;
+ Ops.push_back(NewVal);
+ Ops.push_back(Chain);
+ return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops);
+ }
+ case ISD::RET: {
+ SDOperand Copy;
+
+ switch(Op.getNumOperands()) {
+ default:
+ assert(0 && "Do not know how to return this many arguments!");
+ abort();
+ case 1:
+ return SDOperand(); // ret void is legal
+ case 2: {
+ unsigned ArgReg;
+ switch(Op.getOperand(1).getValueType()) {
+ default: assert(0 && "Unknown type to return!");
+ case MVT::i32: ArgReg = SP::I0; break;
+ case MVT::f32: ArgReg = SP::F0; break;
+ case MVT::f64: ArgReg = SP::D0; break;
+ }
+ Copy = DAG.getCopyToReg(Op.getOperand(0), ArgReg, Op.getOperand(1),
+ SDOperand());
+ break;
+ }
+ case 3:
+ Copy = DAG.getCopyToReg(Op.getOperand(0), SP::I0, Op.getOperand(2),
+ SDOperand());
+ Copy = DAG.getCopyToReg(Copy, SP::I1, Op.getOperand(1), Copy.getValue(1));
+ break;
+ }
+ return DAG.getNode(SPISD::RET_FLAG, MVT::Other, Copy, Copy.getValue(1));
+ }
+ }
}
+MachineBasicBlock *
+SparcTargetLowering::InsertAtEndOfBasicBlock(MachineInstr *MI,
+ MachineBasicBlock *BB) {
+ unsigned BROpcode;
+ unsigned CC;
+ // Figure out the conditional branch opcode to use for this select_cc.
+ switch (MI->getOpcode()) {
+ default: assert(0 && "Unknown SELECT_CC!");
+ case SP::SELECT_CC_Int_ICC:
+ case SP::SELECT_CC_FP_ICC:
+ case SP::SELECT_CC_DFP_ICC:
+ BROpcode = SP::BCOND;
+ break;
+ case SP::SELECT_CC_Int_FCC:
+ case SP::SELECT_CC_FP_FCC:
+ case SP::SELECT_CC_DFP_FCC:
+ BROpcode = SP::FBCOND;
+ break;
+ }
+
+ CC = (SPCC::CondCodes)MI->getOperand(3).getImmedValue();
+
+ // To "insert" a SELECT_CC instruction, we actually have to insert the diamond
+ // control-flow pattern. The incoming instruction knows the destination vreg
+ // to set, the condition code register to branch on, the true/false values to
+ // select between, and a branch opcode to use.
+ const BasicBlock *LLVM_BB = BB->getBasicBlock();
+ ilist<MachineBasicBlock>::iterator It = BB;
+ ++It;
+
+ // thisMBB:
+ // ...
+ // TrueVal = ...
+ // [f]bCC copy1MBB
+ // fallthrough --> copy0MBB
+ MachineBasicBlock *thisMBB = BB;
+ MachineBasicBlock *copy0MBB = new MachineBasicBlock(LLVM_BB);
+ MachineBasicBlock *sinkMBB = new MachineBasicBlock(LLVM_BB);
+ BuildMI(BB, BROpcode, 2).addMBB(sinkMBB).addImm(CC);
+ MachineFunction *F = BB->getParent();
+ F->getBasicBlockList().insert(It, copy0MBB);
+ F->getBasicBlockList().insert(It, sinkMBB);
+ // Update machine-CFG edges by first adding all successors of the current
+ // block to the new block which will contain the Phi node for the select.
+ for(MachineBasicBlock::succ_iterator i = BB->succ_begin(),
+ e = BB->succ_end(); i != e; ++i)
+ sinkMBB->addSuccessor(*i);
+ // Next, remove all successors of the current block, and add the true
+ // and fallthrough blocks as its successors.
+ while(!BB->succ_empty())
+ BB->removeSuccessor(BB->succ_begin());
+ BB->addSuccessor(copy0MBB);
+ BB->addSuccessor(sinkMBB);
+
+ // copy0MBB:
+ // %FalseValue = ...
+ // # fallthrough to sinkMBB
+ BB = copy0MBB;
+
+ // Update machine-CFG edges
+ BB->addSuccessor(sinkMBB);
+
+ // sinkMBB:
+ // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
+ // ...
+ BB = sinkMBB;
+ BuildMI(BB, SP::PHI, 4, MI->getOperand(0).getReg())
+ .addReg(MI->getOperand(2).getReg()).addMBB(copy0MBB)
+ .addReg(MI->getOperand(1).getReg()).addMBB(thisMBB);
+
+ delete MI; // The pseudo instruction is gone now.
+ return BB;
+}
+
//===----------------------------------------------------------------------===//
// Instruction Selector Implementation
//===----------------------------------------------------------------------===//
//===--------------------------------------------------------------------===//
-/// SparcV8DAGToDAGISel - PPC specific code to select Sparc V8 machine
+/// SparcDAGToDAGISel - SPARC specific code to select SPARC machine
/// instructions for SelectionDAG operations.
///
namespace {
-class SparcV8DAGToDAGISel : public SelectionDAGISel {
- SparcV8TargetLowering V8Lowering;
+class SparcDAGToDAGISel : public SelectionDAGISel {
+ SparcTargetLowering Lowering;
+
+ /// Subtarget - Keep a pointer to the Sparc Subtarget around so that we can
+ /// make the right decision when generating code for different targets.
+ const SparcSubtarget &Subtarget;
public:
- SparcV8DAGToDAGISel(TargetMachine &TM)
- : SelectionDAGISel(V8Lowering), V8Lowering(TM) {}
+ SparcDAGToDAGISel(TargetMachine &TM)
+ : SelectionDAGISel(Lowering), Lowering(TM),
+ Subtarget(TM.getSubtarget<SparcSubtarget>()) {
+ }
- SDOperand Select(SDOperand Op);
+ void Select(SDOperand &Result, SDOperand Op);
// Complex Pattern Selectors.
bool SelectADDRrr(SDOperand N, SDOperand &R1, SDOperand &R2);
virtual void InstructionSelectBasicBlock(SelectionDAG &DAG);
virtual const char *getPassName() const {
- return "PowerPC DAG->DAG Pattern Instruction Selection";
+ return "SPARC DAG->DAG Pattern Instruction Selection";
}
// Include the pieces autogenerated from the target description.
-#include "SparcV8GenDAGISel.inc"
+#include "SparcGenDAGISel.inc"
};
} // end anonymous namespace
/// InstructionSelectBasicBlock - This callback is invoked by
/// SelectionDAGISel when it has created a SelectionDAG for us to codegen.
-void SparcV8DAGToDAGISel::InstructionSelectBasicBlock(SelectionDAG &DAG) {
+void SparcDAGToDAGISel::InstructionSelectBasicBlock(SelectionDAG &DAG) {
DEBUG(BB->dump());
// Select target instructions for the DAG.
- DAG.setRoot(Select(DAG.getRoot()));
+ DAG.setRoot(SelectRoot(DAG.getRoot()));
CodeGenMap.clear();
DAG.RemoveDeadNodes();
ScheduleAndEmitDAG(DAG);
}
-bool SparcV8DAGToDAGISel::SelectADDRrr(SDOperand Addr, SDOperand &R1,
- SDOperand &R2) {
- if (Addr.getOpcode() == ISD::ADD) {
- if (isa<ConstantSDNode>(Addr.getOperand(1)) &&
- Predicate_simm13(Addr.getOperand(1).Val))
- return false; // Let the reg+imm pattern catch this!
- R1 = Addr.getOperand(0);
- R2 = Addr.getOperand(1);
+bool SparcDAGToDAGISel::SelectADDRri(SDOperand Addr, SDOperand &Base,
+ SDOperand &Offset) {
+ if (FrameIndexSDNode *FIN = dyn_cast<FrameIndexSDNode>(Addr)) {
+ Base = CurDAG->getTargetFrameIndex(FIN->getIndex(), MVT::i32);
+ Offset = CurDAG->getTargetConstant(0, MVT::i32);
return true;
}
-
- R1 = Select(Addr);
- R2 = CurDAG->getRegister(V8::G0, MVT::i32);
- return true;
-}
-
-bool SparcV8DAGToDAGISel::SelectADDRri(SDOperand Addr, SDOperand &Base,
- SDOperand &Offset) {
+ if (Addr.getOpcode() == ISD::TargetExternalSymbol ||
+ Addr.getOpcode() == ISD::TargetGlobalAddress)
+ return false; // direct calls.
+
if (Addr.getOpcode() == ISD::ADD) {
- if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Addr.getOperand(1)))
+ if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Addr.getOperand(1))) {
if (Predicate_simm13(CN)) {
- Base = Addr.getOperand(0);
+ if (FrameIndexSDNode *FIN =
+ dyn_cast<FrameIndexSDNode>(Addr.getOperand(0))) {
+ // Constant offset from frame ref.
+ Base = CurDAG->getTargetFrameIndex(FIN->getIndex(), MVT::i32);
+ } else {
+ Base = Addr.getOperand(0);
+ }
Offset = CurDAG->getTargetConstant(CN->getValue(), MVT::i32);
return true;
}
+ }
+ if (Addr.getOperand(0).getOpcode() == SPISD::Lo) {
+ Base = Addr.getOperand(1);
+ Offset = Addr.getOperand(0).getOperand(0);
+ return true;
+ }
+ if (Addr.getOperand(1).getOpcode() == SPISD::Lo) {
+ Base = Addr.getOperand(0);
+ Offset = Addr.getOperand(1).getOperand(0);
+ return true;
+ }
}
- Base = Select(Addr);
+ Base = Addr;
Offset = CurDAG->getTargetConstant(0, MVT::i32);
return true;
}
+bool SparcDAGToDAGISel::SelectADDRrr(SDOperand Addr, SDOperand &R1,
+ SDOperand &R2) {
+ if (Addr.getOpcode() == ISD::FrameIndex) return false;
+ if (Addr.getOpcode() == ISD::TargetExternalSymbol ||
+ Addr.getOpcode() == ISD::TargetGlobalAddress)
+ return false; // direct calls.
+
+ if (Addr.getOpcode() == ISD::ADD) {
+ if (isa<ConstantSDNode>(Addr.getOperand(1)) &&
+ Predicate_simm13(Addr.getOperand(1).Val))
+ return false; // Let the reg+imm pattern catch this!
+ if (Addr.getOperand(0).getOpcode() == SPISD::Lo ||
+ Addr.getOperand(1).getOpcode() == SPISD::Lo)
+ return false; // Let the reg+imm pattern catch this!
+ R1 = Addr.getOperand(0);
+ R2 = Addr.getOperand(1);
+ return true;
+ }
-SDOperand SparcV8DAGToDAGISel::Select(SDOperand Op) {
+ R1 = Addr;
+ R2 = CurDAG->getRegister(SP::G0, MVT::i32);
+ return true;
+}
+
+void SparcDAGToDAGISel::Select(SDOperand &Result, SDOperand Op) {
SDNode *N = Op.Val;
- if (N->getOpcode() >= ISD::BUILTIN_OP_END/* &&
- N->getOpcode() < V8ISD::FIRST_NUMBER*/)
- return Op; // Already selected.
+ if (N->getOpcode() >= ISD::BUILTIN_OP_END &&
+ N->getOpcode() < SPISD::FIRST_NUMBER) {
+ Result = Op;
+ return; // 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;
+ if (CGMI != CodeGenMap.end()) {
+ Result = CGMI->second;
+ return;
+ }
switch (N->getOpcode()) {
default: break;
- case ISD::ADD_PARTS: {
- SDOperand LHSL = Select(N->getOperand(0));
- SDOperand LHSH = Select(N->getOperand(1));
- SDOperand RHSL = Select(N->getOperand(2));
- SDOperand RHSH = Select(N->getOperand(3));
- // FIXME, handle immediate RHS.
- SDOperand Low = CurDAG->getTargetNode(V8::ADDCCrr, MVT::i32, MVT::Flag,
- LHSL, RHSL);
- SDOperand Hi = CurDAG->getTargetNode(V8::ADDXrr, MVT::i32, LHSH, RHSH,
- Low.getValue(1));
- CodeGenMap[SDOperand(N, 0)] = Low;
- CodeGenMap[SDOperand(N, 1)] = Hi;
- return Op.ResNo ? Hi : Low;
- }
- case ISD::SUB_PARTS: {
- SDOperand LHSL = Select(N->getOperand(0));
- SDOperand LHSH = Select(N->getOperand(1));
- SDOperand RHSL = Select(N->getOperand(2));
- SDOperand RHSH = Select(N->getOperand(3));
- // FIXME, handle immediate RHS.
- SDOperand Low = CurDAG->getTargetNode(V8::SUBCCrr, MVT::i32, MVT::Flag,
- LHSL, RHSL);
- SDOperand Hi = CurDAG->getTargetNode(V8::SUBXrr, MVT::i32, LHSH, RHSH,
- Low.getValue(1));
- CodeGenMap[SDOperand(N, 0)] = Low;
- CodeGenMap[SDOperand(N, 1)] = Hi;
- return Op.ResNo ? Hi : Low;
- }
case ISD::SDIV:
case ISD::UDIV: {
// FIXME: should use a custom expander to expose the SRA to the dag.
- SDOperand DivLHS = Select(N->getOperand(0));
- SDOperand DivRHS = Select(N->getOperand(1));
+ SDOperand DivLHS, DivRHS;
+ Select(DivLHS, N->getOperand(0));
+ Select(DivRHS, N->getOperand(1));
// Set the Y register to the high-part.
SDOperand TopPart;
if (N->getOpcode() == ISD::SDIV) {
- TopPart = CurDAG->getTargetNode(V8::SRAri, MVT::i32, DivLHS,
- CurDAG->getTargetConstant(31, MVT::i32));
+ TopPart = SDOperand(CurDAG->getTargetNode(SP::SRAri, MVT::i32, DivLHS,
+ CurDAG->getTargetConstant(31, MVT::i32)), 0);
} else {
- TopPart = CurDAG->getRegister(V8::G0, MVT::i32);
+ TopPart = CurDAG->getRegister(SP::G0, MVT::i32);
}
- TopPart = CurDAG->getTargetNode(V8::WRYrr, MVT::Flag, TopPart,
- CurDAG->getRegister(V8::G0, MVT::i32));
+ TopPart = SDOperand(CurDAG->getTargetNode(SP::WRYrr, MVT::Flag, TopPart,
+ CurDAG->getRegister(SP::G0, MVT::i32)), 0);
// FIXME: Handle div by immediate.
- unsigned Opcode = N->getOpcode() == ISD::SDIV ? V8::SDIVrr : V8::UDIVrr;
- return CurDAG->SelectNodeTo(N, Opcode, MVT::i32, DivLHS, DivRHS, TopPart);
+ unsigned Opcode = N->getOpcode() == ISD::SDIV ? SP::SDIVrr : SP::UDIVrr;
+ Result = CurDAG->SelectNodeTo(N, Opcode, MVT::i32, DivLHS, DivRHS, TopPart);
+ return;
}
case ISD::MULHU:
case ISD::MULHS: {
// FIXME: Handle mul by immediate.
- SDOperand MulLHS = Select(N->getOperand(0));
- SDOperand MulRHS = Select(N->getOperand(1));
- unsigned Opcode = N->getOpcode() == ISD::MULHU ? V8::UMULrr : V8::SMULrr;
- SDOperand Mul = CurDAG->getTargetNode(Opcode, MVT::i32, MVT::Flag,
- MulLHS, MulRHS);
+ SDOperand MulLHS, MulRHS;
+ Select(MulLHS, N->getOperand(0));
+ Select(MulRHS, N->getOperand(1));
+ unsigned Opcode = N->getOpcode() == ISD::MULHU ? SP::UMULrr : SP::SMULrr;
+ SDNode *Mul = CurDAG->getTargetNode(Opcode, MVT::i32, MVT::Flag,
+ MulLHS, MulRHS);
// The high part is in the Y register.
- return CurDAG->SelectNodeTo(N, V8::RDY, MVT::i32, Mul.getValue(1));
- }
-
- case ISD::RET: {
- if (N->getNumOperands() == 2) {
- SDOperand Chain = Select(N->getOperand(0)); // Token chain.
- SDOperand Val = Select(N->getOperand(1));
- if (N->getOperand(1).getValueType() == MVT::i32) {
- Chain = CurDAG->getCopyToReg(Chain, V8::I0, Val);
- } else if (N->getOperand(1).getValueType() == MVT::f32) {
- Chain = CurDAG->getCopyToReg(Chain, V8::F0, Val);
- } else {
- assert(N->getOperand(1).getValueType() == MVT::f64);
- Chain = CurDAG->getCopyToReg(Chain, V8::D0, Val);
- }
- return CurDAG->SelectNodeTo(N, V8::RETL, MVT::Other, Chain);
- } else if (N->getNumOperands() > 1) {
- SDOperand Chain = Select(N->getOperand(0)); // Token chain.
- 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, V8::I1, Select(N->getOperand(1)));
- Chain = CurDAG->getCopyToReg(Chain, V8::I0, Select(N->getOperand(2)));
- return CurDAG->SelectNodeTo(N, V8::RETL, MVT::Other, Chain);
- }
- break; // Generated code handles the void case.
+ Result = CurDAG->SelectNodeTo(N, SP::RDY, MVT::i32, SDOperand(Mul, 1));
+ return;
}
}
- return SelectCode(Op);
+ SelectCode(Result, Op);
}
-/// createPPCISelDag - This pass converts a legalized DAG into a
-/// PowerPC-specific DAG, ready for instruction scheduling.
+/// createSparcISelDag - This pass converts a legalized DAG into a
+/// SPARC-specific DAG, ready for instruction scheduling.
///
-FunctionPass *llvm::createSparcV8ISelDag(TargetMachine &TM) {
- return new SparcV8DAGToDAGISel(TM);
+FunctionPass *llvm::createSparcISelDag(TargetMachine &TM) {
+ return new SparcDAGToDAGISel(TM);
}
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