This file implements the lowering of LLVM calls to machine code calls for GlobalISel. More...
#include "AArch64CallLowering.h"#include "AArch64ISelLowering.h"#include "AArch64MachineFunctionInfo.h"#include "AArch64Subtarget.h"#include "llvm/ADT/ArrayRef.h"#include "llvm/ADT/SmallVector.h"#include "llvm/CodeGen/Analysis.h"#include "llvm/CodeGen/CallingConvLower.h"#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"#include "llvm/CodeGen/GlobalISel/Utils.h"#include "llvm/CodeGen/LowLevelType.h"#include "llvm/CodeGen/MachineBasicBlock.h"#include "llvm/CodeGen/MachineFrameInfo.h"#include "llvm/CodeGen/MachineFunction.h"#include "llvm/CodeGen/MachineInstrBuilder.h"#include "llvm/CodeGen/MachineMemOperand.h"#include "llvm/CodeGen/MachineOperand.h"#include "llvm/CodeGen/MachineRegisterInfo.h"#include "llvm/CodeGen/TargetRegisterInfo.h"#include "llvm/CodeGen/TargetSubtargetInfo.h"#include "llvm/CodeGen/ValueTypes.h"#include "llvm/IR/Argument.h"#include "llvm/IR/Attributes.h"#include "llvm/IR/Function.h"#include "llvm/IR/Type.h"#include "llvm/IR/Value.h"#include "llvm/Support/MachineValueType.h"#include <algorithm>#include <cassert>#include <cstdint>#include <iterator>
Go to the source code of this file.
Macros | |
| #define | DEBUG_TYPE "aarch64-call-lowering" |
Functions | |
| static bool | doesCalleeRestoreStack (CallingConv::ID CallConv, bool TailCallOpt) |
| static void | handleMustTailForwardedRegisters (MachineIRBuilder &MIRBuilder, CCAssignFn *AssignFn) |
| Helper function to compute forwarded registers for musttail calls. 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 std::pair< CCAssignFn *, CCAssignFn * > | getAssignFnsForCC (CallingConv::ID CC, const AArch64TargetLowering &TLI) |
| Returns a pair containing the fixed CCAssignFn and the vararg CCAssignFn for CC. More... | |
| static unsigned | getCallOpcode (const Function &CallerF, bool IsIndirect, bool IsTailCall) |
Detailed Description
This file implements the lowering of LLVM calls to machine code calls for GlobalISel.
Definition in file AArch64CallLowering.cpp.
Macro Definition Documentation
◆ DEBUG_TYPE
| #define DEBUG_TYPE "aarch64-call-lowering" |
Definition at line 47 of file AArch64CallLowering.cpp.
Function Documentation
◆ canGuaranteeTCO()
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static |
Return true if the calling convention is one that we can guarantee TCO for.
Definition at line 496 of file AArch64CallLowering.cpp.
References llvm::CallingConv::Fast.
Referenced by llvm::AArch64CallLowering::isEligibleForTailCallOptimization(), and mayTailCallThisCC().
◆ doesCalleeRestoreStack()
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static |
Definition at line 213 of file AArch64CallLowering.cpp.
References assert(), llvm::SmallVectorTemplateCommon< T >::back(), llvm::ComputeValueVTs(), llvm::numbers::e, llvm::SmallVectorImpl< T >::emplace_back(), llvm::CallingConv::Fast, llvm::AArch64TargetLowering::functionArgumentNeedsConsecutiveRegisters(), MRI, and llvm::SmallVectorBase::size().
Referenced by llvm::AArch64CallLowering::lowerCall(), and llvm::AArch64CallLowering::lowerFormalArguments().
◆ getAssignFnsForCC()
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static |
Returns a pair containing the fixed CCAssignFn and the vararg CCAssignFn for CC.
Definition at line 515 of file AArch64CallLowering.cpp.
References llvm::CallLowering::analyzeArgInfo(), llvm::AArch64TargetLowering::CCAssignFnForCall(), llvm::MachineOperand::clobbersPhysReg(), llvm::dbgs(), llvm::SmallVectorBase::empty(), llvm::AArch64FunctionInfo::getBytesInStackArgArea(), llvm::Function::getCallingConv(), llvm::Function::getContext(), llvm::getDefIgnoringCopies(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getSubtarget(), llvm::AArch64Subtarget::hasCustomCallingConv(), Info, LLVM_DEBUG, Reg, llvm::CallLowering::resultsCompatible(), llvm::SmallVectorBase::size(), and TRI.
Referenced by getCallOpcode(), and llvm::AArch64CallLowering::lowerCall().
◆ getCallOpcode()
Definition at line 760 of file AArch64CallLowering.cpp.
References llvm::MachineInstrBuilder::add(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::alignTo(), llvm::CallLowering::analyzeArgInfo(), llvm::any_of(), assert(), llvm::ARCISD::BL, llvm::MachineIRBuilder::buildCopy(), llvm::MachineIRBuilder::buildInstr(), llvm::MachineIRBuilder::buildInstrNoInsert(), llvm::constrainOperandRegClass(), llvm::dbgs(), F(), getAssignFnsForCC(), llvm::Function::getCallingConv(), llvm::Function::getContext(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineIRBuilder::getMF(), llvm::MachineInstr::getOperand(), llvm::TargetSubtargetInfo::getRegBankInfo(), llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getSubtarget(), llvm::MachineFunction::getTarget(), llvm::TargetOptions::GuaranteedTailCallOpt, llvm::CallLowering::handleAssignments(), llvm::AArch64Subtarget::hasCustomCallingConv(), llvm::Function::hasFnAttribute(), llvm::RegState::Implicit, Info, llvm::MachineIRBuilder::insertInstr(), LLVM_DEBUG, llvm::BitmaskEnumDetail::Mask(), llvm::TargetMachine::Options, Register, llvm::MachineFrameInfo::setHasTailCall(), llvm::MachineOperand::setImm(), llvm::MachineOperand::setReg(), and TRI.
Referenced by llvm::ARMCallLowering::lowerCall(), llvm::AArch64CallLowering::lowerCall(), and llvm::ARMCallLowering::lowerFormalArguments().
◆ handleMustTailForwardedRegisters()
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static |
Helper function to compute forwarded registers for musttail calls.
Computes the forwarded registers, sets MBB liveness, and emits COPY instructions that can be used to save + restore registers later.
Definition at line 374 of file AArch64CallLowering.cpp.
References llvm::MachineBasicBlock::addLiveIn(), llvm::MachineFunction::addLiveIn(), assert(), llvm::MachineIRBuilder::buildCopy(), F(), llvm::MVT::f128, llvm::MachineFunction::getContext(), llvm::AArch64FunctionInfo::getForwardedMustTailRegParms(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::MachineIRBuilder::getMBB(), llvm::MachineIRBuilder::getMF(), llvm::MachineFrameInfo::hasMustTailInVarArgFunc(), llvm::MVT::i64, llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::SmallVectorTemplateBase< T >::push_back(), and Register.
Referenced by llvm::AArch64CallLowering::lowerFormalArguments().
◆ mayTailCallThisCC()
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static |
Return true if we might ever do TCO for calls with this calling convention.
Definition at line 501 of file AArch64CallLowering.cpp.
References llvm::CallingConv::C, canGuaranteeTCO(), llvm::CallingConv::PreserveMost, and llvm::CallingConv::Swift.
Referenced by llvm::AArch64CallLowering::isEligibleForTailCallOptimization().
