LLVM
15.0.0git
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#include "M68kISelLowering.h"
#include "M68kCallingConv.h"
#include "M68kMachineFunction.h"
#include "M68kSubtarget.h"
#include "M68kTargetMachine.h"
#include "M68kTargetObjectFile.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/CallingConvLower.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/KnownBits.h"
#include "llvm/Support/raw_ostream.h"
#include "M68kGenCallingConv.inc"
Go to the source code of this file.
Macros | |
#define | DEBUG_TYPE "M68k-isel" |
Enumerations | |
enum | StructReturnType { NotStructReturn, RegStructReturn, StackStructReturn } |
Functions | |
STATISTIC (NumTailCalls, "Number of tail calls") | |
static StructReturnType | callIsStructReturn (const SmallVectorImpl< ISD::OutputArg > &Outs) |
static StructReturnType | argsAreStructReturn (const SmallVectorImpl< ISD::InputArg > &Ins) |
Determines whether a function uses struct return semantics. More... | |
static SDValue | CreateCopyOfByValArgument (SDValue Src, SDValue Dst, SDValue Chain, ISD::ArgFlagsTy Flags, SelectionDAG &DAG, const SDLoc &DL) |
Make a copy of an aggregate at address specified by "Src" to address "Dst" with size and alignment information specified by the specific parameter attribute. More... | |
static bool | canGuaranteeTCO (CallingConv::ID CC) |
Return true if the calling convention is one that we can guarantee TCO for. More... | |
static bool | mayTailCallThisCC (CallingConv::ID CC) |
Return true if we might ever do TCO for calls with this calling convention. More... | |
static bool | shouldGuaranteeTCO (CallingConv::ID CC, bool GuaranteedTailCallOpt) |
Return true if the function is being made into a tailcall target by changing its ABI. More... | |
static bool | MatchingStackOffset (SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags, MachineFrameInfo &MFI, const MachineRegisterInfo *MRI, const M68kInstrInfo *TII, const CCValAssign &VA) |
Return true if the given stack call argument is already available in the same position (relatively) of the caller's incoming argument stack. More... | |
static SDValue | getBitTestCondition (SDValue Src, SDValue BitNo, ISD::CondCode CC, const SDLoc &DL, SelectionDAG &DAG) |
Create a BTST (Bit Test) node - Test bit BitNo in Src and set condition according to equal/not-equal condition code CC . More... | |
static SDValue | LowerAndToBTST (SDValue And, ISD::CondCode CC, const SDLoc &DL, SelectionDAG &DAG) |
Result of 'and' is compared against zero. Change to a BTST node if possible. More... | |
static M68k::CondCode | TranslateIntegerM68kCC (ISD::CondCode SetCCOpcode) |
static unsigned | TranslateM68kCC (ISD::CondCode SetCCOpcode, const SDLoc &DL, bool IsFP, SDValue &LHS, SDValue &RHS, SelectionDAG &DAG) |
Do a one-to-one translation of a ISD::CondCode to the M68k-specific condition code, returning the condition code and the LHS/RHS of the comparison to make. More... | |
static SDValue | LowerTruncateToBTST (SDValue Op, ISD::CondCode CC, const SDLoc &DL, SelectionDAG &DAG) |
static bool | hasNonFlagsUse (SDValue Op) |
return true if Op has a use that doesn't just read flags. More... | |
static bool | isM68kCCUnsigned (unsigned M68kCC) |
Return true if the condition is an unsigned comparison operation. More... | |
static bool | isM68kLogicalCmp (SDValue Op) |
Return true if opcode is a M68k logical comparison. More... | |
static bool | isTruncWithZeroHighBitsInput (SDValue V, SelectionDAG &DAG) |
static bool | isAndOrOfSetCCs (SDValue Op, unsigned &Opc) |
Return true if node is an ISD::AND or ISD::OR of two M68k::SETcc nodes each of which has no other use apart from the AND / OR. More... | |
static bool | isXor1OfSetCC (SDValue Op) |
Return true if node is an ISD::XOR of a M68kISD::SETCC and 1 and that the SETCC node has a single use. More... | |
static bool | isCMOVPseudo (MachineInstr &MI) |
static bool | checkAndUpdateCCRKill (MachineBasicBlock::iterator SelectItr, MachineBasicBlock *BB, const TargetRegisterInfo *TRI) |
static SDValue | getSETCC (M68k::CondCode Cond, SDValue CCR, const SDLoc &dl, SelectionDAG &DAG) |
static SDValue | combineCarryThroughADD (SDValue CCR) |
static SDValue | combineSetCCCCR (SDValue CCR, M68k::CondCode &CC, SelectionDAG &DAG, const M68kSubtarget &Subtarget) |
Optimize a CCR definition used according to the condition code CC into a simpler CCR value, potentially returning a new CC and replacing uses of chain values. More... | |
static SDValue | combineM68kSetCC (SDNode *N, SelectionDAG &DAG, const M68kSubtarget &Subtarget) |
static SDValue | combineM68kBrCond (SDNode *N, SelectionDAG &DAG, const M68kSubtarget &Subtarget) |
static SDValue | combineSUBX (SDNode *N, SelectionDAG &DAG) |
static SDValue | combineADDX (SDNode *N, SelectionDAG &DAG, TargetLowering::DAGCombinerInfo &DCI) |
This file defines the interfaces that M68k uses to lower LLVM code into a selection DAG.
Definition in file M68kISelLowering.cpp.
#define DEBUG_TYPE "M68k-isel" |
Definition at line 42 of file M68kISelLowering.cpp.
enum StructReturnType |
Enumerator | |
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NotStructReturn | |
RegStructReturn | |
StackStructReturn |
Definition at line 181 of file M68kISelLowering.cpp.
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Determines whether a function uses struct return semantics.
Definition at line 198 of file M68kISelLowering.cpp.
References llvm::MipsISD::Ins, llvm::ISD::ArgFlagsTy::isInReg(), llvm::ISD::ArgFlagsTy::isSRet(), NotStructReturn, RegStructReturn, and StackStructReturn.
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Definition at line 184 of file M68kISelLowering.cpp.
References llvm::ISD::ArgFlagsTy::isInReg(), llvm::ISD::ArgFlagsTy::isSRet(), NotStructReturn, RegStructReturn, and StackStructReturn.
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Return true if the calling convention is one that we can guarantee TCO for.
Definition at line 225 of file M68kISelLowering.cpp.
Referenced by mayTailCallThisCC(), and shouldGuaranteeTCO().
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Definition at line 2918 of file M68kISelLowering.cpp.
References BB, llvm::MachineInstr::definesRegister(), llvm::MachineInstr::readsRegister(), and TRI.
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Definition at line 3437 of file M68kISelLowering.cpp.
References llvm::M68kISD::ADDX, combineCarryThroughADD(), llvm::SelectionDAG::getNode(), llvm::SelectionDAG::getVTList(), llvm::MVT::i32, and N.
Definition at line 3359 of file M68kISelLowering.cpp.
References llvm::M68kISD::ADD, llvm::ISD::AND, llvm::ISD::ANY_EXTEND, llvm::M68k::COND_CS, llvm::SDValue::getConstantOperandVal(), llvm::SDValue::getOpcode(), llvm::SDValue::getOperand(), llvm::isAllOnesConstant(), llvm::isOneConstant(), llvm::M68kISD::SETCC, llvm::M68kISD::SETCC_CARRY, llvm::ISD::SIGN_EXTEND, llvm::ISD::TRUNCATE, and llvm::ISD::ZERO_EXTEND.
Referenced by combineADDX(), combineSetCCCCR(), and combineSUBX().
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Definition at line 3407 of file M68kISelLowering.cpp.
References llvm::M68kISD::BRCOND, combineSetCCCCR(), Cond, DL, llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getNode(), llvm::MVT::i8, and N.
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Definition at line 3395 of file M68kISelLowering.cpp.
References combineSetCCCCR(), DL, getSETCC(), and N.
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Optimize a CCR definition used according to the condition code CC
into a simpler CCR value, potentially returning a new CC
and replacing uses of chain values.
Definition at line 3384 of file M68kISelLowering.cpp.
References combineCarryThroughADD(), and llvm::M68k::COND_CS.
Referenced by combineM68kBrCond(), and combineM68kSetCC().
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Definition at line 3425 of file M68kISelLowering.cpp.
References combineCarryThroughADD(), llvm::SelectionDAG::getNode(), llvm::SelectionDAG::getVTList(), llvm::MVT::i32, N, and llvm::M68kISD::SUBX.
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Make a copy of an aggregate at address specified by "Src" to address "Dst" with size and alignment information specified by the specific parameter attribute.
The copy will be passed as a byval function parameter.
Definition at line 213 of file M68kISelLowering.cpp.
References DL, llvm::ISD::ArgFlagsTy::getByValSize(), llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getMemcpy(), llvm::ISD::ArgFlagsTy::getNonZeroByValAlign(), and llvm::MVT::i32.
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Create a BTST (Bit Test) node - Test bit BitNo
in Src
and set condition according to equal/not-equal condition code CC
.
Definition at line 1423 of file M68kISelLowering.cpp.
References llvm::ISD::ANY_EXTEND, llvm::M68kISD::BTST, Cond, llvm::M68k::COND_EQ, llvm::M68k::COND_NE, DL, llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getNode(), llvm::SDValue::getValueType(), llvm::MVT::i16, llvm::MVT::i32, llvm::MVT::i8, llvm::M68kISD::SETCC, and llvm::ISD::SETEQ.
Referenced by LowerAndToBTST(), and LowerTruncateToBTST().
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Definition at line 3351 of file M68kISelLowering.cpp.
References Cond, llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getNode(), llvm::MVT::i8, and llvm::M68kISD::SETCC.
Referenced by combineM68kSetCC().
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return true if Op
has a use that doesn't just read flags.
Definition at line 1619 of file M68kISelLowering.cpp.
References llvm::ISD::BRCOND, llvm::Value::hasOneUse(), llvm::ISD::SELECT, llvm::ISD::SETCC, llvm::ISD::TRUNCATE, and llvm::Value::use_begin().
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Return true if node is an ISD::AND or ISD::OR of two M68k::SETcc nodes each of which has no other use apart from the AND / OR.
Definition at line 2232 of file M68kISelLowering.cpp.
References llvm::ISD::AND, llvm::M68k::IsSETCC(), and llvm::ISD::OR.
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Definition at line 2901 of file M68kISelLowering.cpp.
References MI.
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Return true if the condition is an unsigned comparison operation.
Definition at line 1853 of file M68kISelLowering.cpp.
References llvm::M68k::COND_CC, llvm::M68k::COND_CS, llvm::M68k::COND_EQ, llvm::M68k::COND_GE, llvm::M68k::COND_GT, llvm::M68k::COND_HI, llvm::M68k::COND_LE, llvm::M68k::COND_LS, llvm::M68k::COND_LT, llvm::M68k::COND_NE, and llvm_unreachable.
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Return true if opcode is a M68k logical comparison.
Definition at line 2003 of file M68kISelLowering.cpp.
References llvm::M68kISD::ADD, llvm::M68kISD::ADDX, llvm::M68kISD::AND, llvm::M68kISD::CMP, llvm::M68kISD::OR, llvm::M68kISD::SMUL, llvm::M68kISD::SUB, llvm::M68kISD::SUBX, llvm::M68kISD::UMUL, and llvm::M68kISD::XOR.
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Definition at line 2019 of file M68kISelLowering.cpp.
References llvm::tgtok::Bits, llvm::APInt::getHighBitsSet(), llvm::SDValue::getOpcode(), llvm::SDValue::getOperand(), llvm::SDValue::getValueSizeInBits(), llvm::SelectionDAG::MaskedValueIsZero(), and llvm::ISD::TRUNCATE.
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Return true if node is an ISD::XOR of a M68kISD::SETCC and 1 and that the SETCC node has a single use.
Definition at line 2244 of file M68kISelLowering.cpp.
References llvm::isOneConstant(), llvm::M68kISD::SETCC, and llvm::ISD::XOR.
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Result of 'and' is compared against zero. Change to a BTST node if possible.
Definition at line 1445 of file M68kISelLowering.cpp.
References llvm::And, llvm::BitWidth, llvm::SelectionDAG::computeKnownBits(), DL, getBitTestCondition(), llvm::SelectionDAG::getConstant(), llvm::SDValue::getOpcode(), llvm::SDValue::getOperand(), llvm::SDValue::getValueSizeInBits(), llvm::isOneConstant(), llvm::isPowerOf2_64(), llvm::isUInt< 32 >(), LHS, llvm::Log2_64_Ceil(), RHS, llvm::ISD::SHL, llvm::ISD::SRL, std::swap(), and llvm::ISD::TRUNCATE.
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Definition at line 1604 of file M68kISelLowering.cpp.
References assert(), DL, getBitTestCondition(), llvm::SDValue::getOperand(), llvm::MVT::i1, llvm::ISD::SRL, and llvm::ISD::TRUNCATE.
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Return true if the given stack call argument is already available in the same position (relatively) of the caller's incoming argument stack.
Definition at line 246 of file M68kISelLowering.cpp.
References llvm::ISD::ANY_EXTEND, Arg, assert(), llvm::ISD::AssertZext, llvm::ISD::BITCAST, llvm::ISD::CopyFromReg, llvm::tgtok::Def, llvm::ISD::FrameIndex, llvm::ISD::ArgFlagsTy::getByValSize(), llvm::FrameIndexSDNode::getIndex(), llvm::CCValAssign::getLocVT(), llvm::MachineFrameInfo::getObjectOffset(), llvm::MachineFrameInfo::getObjectSize(), llvm::SDValue::getOpcode(), llvm::SDValue::getOperand(), llvm::MVT::getSizeInBits(), llvm::MachineRegisterInfo::getVRegDef(), llvm::ISD::ArgFlagsTy::isByVal(), llvm::MachineFrameInfo::isFixedObjectIndex(), llvm::HexagonInstrInfo::isLoadFromStackSlot(), llvm::MachineFrameInfo::isObjectSExt(), llvm::MachineFrameInfo::isObjectZExt(), llvm::ISD::ArgFlagsTy::isSExt(), llvm::Register::isVirtualRegister(), llvm::ISD::ArgFlagsTy::isZExt(), MRI, TII, llvm::ISD::TRUNCATE, and llvm::ISD::ZERO_EXTEND.
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Return true if we might ever do TCO for calls with this calling convention.
Definition at line 228 of file M68kISelLowering.cpp.
References llvm::CallingConv::C, and canGuaranteeTCO().
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Return true if the function is being made into a tailcall target by changing its ABI.
Definition at line 240 of file M68kISelLowering.cpp.
References canGuaranteeTCO().
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Definition at line 1493 of file M68kISelLowering.cpp.
References llvm::M68k::COND_CC, llvm::M68k::COND_CS, llvm::M68k::COND_EQ, llvm::M68k::COND_GE, llvm::M68k::COND_GT, llvm::M68k::COND_HI, llvm::M68k::COND_LE, llvm::M68k::COND_LS, llvm::M68k::COND_LT, llvm::M68k::COND_NE, llvm_unreachable, llvm::ISD::SETEQ, llvm::ISD::SETGE, llvm::ISD::SETGT, llvm::ISD::SETLE, llvm::ISD::SETLT, llvm::ISD::SETNE, llvm::ISD::SETUGE, llvm::ISD::SETUGT, llvm::ISD::SETULE, and llvm::ISD::SETULT.
Referenced by TranslateM68kCC().
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Do a one-to-one translation of a ISD::CondCode to the M68k-specific condition code, returning the condition code and the LHS/RHS of the comparison to make.
Definition at line 1523 of file M68kISelLowering.cpp.
References llvm::M68k::COND_CC, llvm::M68k::COND_CS, llvm::M68k::COND_EQ, llvm::M68k::COND_HI, llvm::M68k::COND_INVALID, llvm::M68k::COND_LE, llvm::M68k::COND_LS, llvm::M68k::COND_MI, llvm::M68k::COND_NE, llvm::M68k::COND_PL, DL, llvm::SelectionDAG::getConstant(), llvm::ISD::getSetCCSwappedOperands(), llvm::ISD::isNON_EXTLoad(), LHS, llvm_unreachable, RHS, llvm::ISD::SETEQ, llvm::ISD::SETGE, llvm::ISD::SETGT, llvm::ISD::SETLE, llvm::ISD::SETLT, llvm::ISD::SETNE, llvm::ISD::SETOEQ, llvm::ISD::SETOGE, llvm::ISD::SETOGT, llvm::ISD::SETOLE, llvm::ISD::SETOLT, llvm::ISD::SETONE, llvm::ISD::SETUEQ, llvm::ISD::SETUGE, llvm::ISD::SETUGT, llvm::ISD::SETULE, llvm::ISD::SETULT, llvm::ISD::SETUNE, std::swap(), and TranslateIntegerM68kCC().