mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 20:29:48 +00:00
9b6ca9304c
This patch adds an optimization in CodeGenPrepare to move an extractelement
right before a store when the target can combine them.
The optimization may promote any scalar operations to vector operations in the
way to make that possible.
** Context **
Some targets use different register files for both vector and scalar operations.
This means that transitioning from one domain to another may incur copy from one
register file to another. These copies are not coalescable and may be expensive.
For example, according to the scheduling model, on cortex-A8 a vector to GPR
move is 20 cycles.
** Motivating Example **
Let us consider an example:
define void @foo(<2 x i32>* %addr1, i32* %dest) {
%in1 = load <2 x i32>* %addr1, align 8
%extract = extractelement <2 x i32> %in1, i32 1
%out = or i32 %extract, 1
store i32 %out, i32* %dest, align 4
ret void
}
As it is, this IR generates the following assembly on armv7:
vldr d16, [r0] @vector load
vmov.32 r0, d16[1] @ cross-register-file copy: 20 cycles
orr r0, r0, #1 @ scalar bitwise or
str r0, [r1] @ scalar store
bx lr
Whereas we could generate much faster code:
vldr d16, [r0] @ vector load
vorr.i32 d16, #0x1 @ vector bitwise or
vst1.32 {d16[1]}, [r1:32] @ vector extract + store
bx lr
Half of the computation made in the vector is useless, but this allows to get
rid of the expensive cross-register-file copy.
** Proposed Solution **
To avoid this cross-register-copy penalty, we promote the scalar operations to
vector operations. The penalty will be removed if we manage to promote the whole
chain of computation in the vector domain.
Currently, we do that only when the chain of computation ends by a store and the
target is able to combine an extract with a store.
Stores are the most likely candidates, because other instructions produce values
that would need to be promoted and so, extracted as some point[1]. Moreover,
this is customary that targets feature stores that perform a vector extract (see
AArch64 and X86 for instance).
The proposed implementation relies on the TargetTransformInfo to decide whether
or not it is beneficial to promote a chain of computation in the vector domain.
Unfortunately, this interface is rather inaccurate for this level of details and
although this optimization may be beneficial for X86 and AArch64, the inaccuracy
will lead to the optimization being too aggressive.
Basically in TargetTransformInfo, everything that is legal has a cost of 1,
whereas, even if a vector type is legal, usually a vector operation is slightly
more expensive than its scalar counterpart. That will lead to too many
promotions that may not be counter balanced by the saving of the
cross-register-file copy. For instance, on AArch64 this penalty is just 4
cycles.
For now, the optimization is just enabled for ARM prior than v8, since those
processors have a larger penalty on cross-register-file copies, and the scope is
limited to basic blocks. Because of these two factors, we limit the effects of
the inaccuracy. Indeed, I did not want to build up a fancy cost model with block
frequency and everything on top of that.
[1] We can imagine targets that can combine an extractelement with other
instructions than just stores. If we want to go into that direction, the current
interfaces must be augmented and, moreover, I think this becomes a global isel
problem.
Differential Revision: http://reviews.llvm.org/D5921
<rdar://problem/14170854>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220978 91177308-0d34-0410-b5e6-96231b3b80d8
624 lines
26 KiB
C++
624 lines
26 KiB
C++
//===-- ARMISelLowering.h - ARM DAG Lowering Interface ----------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the interfaces that ARM uses to lower LLVM code into a
|
|
// selection DAG.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_TARGET_ARM_ARMISELLOWERING_H
|
|
#define LLVM_LIB_TARGET_ARM_ARMISELLOWERING_H
|
|
|
|
#include "MCTargetDesc/ARMBaseInfo.h"
|
|
#include "llvm/CodeGen/CallingConvLower.h"
|
|
#include "llvm/CodeGen/SelectionDAG.h"
|
|
#include "llvm/Target/TargetLowering.h"
|
|
#include <vector>
|
|
|
|
namespace llvm {
|
|
class ARMConstantPoolValue;
|
|
class ARMSubtarget;
|
|
|
|
namespace ARMISD {
|
|
// ARM Specific DAG Nodes
|
|
enum NodeType {
|
|
// Start the numbering where the builtin ops and target ops leave off.
|
|
FIRST_NUMBER = ISD::BUILTIN_OP_END,
|
|
|
|
Wrapper, // Wrapper - A wrapper node for TargetConstantPool,
|
|
// TargetExternalSymbol, and TargetGlobalAddress.
|
|
WrapperPIC, // WrapperPIC - A wrapper node for TargetGlobalAddress in
|
|
// PIC mode.
|
|
WrapperJT, // WrapperJT - A wrapper node for TargetJumpTable
|
|
|
|
// Add pseudo op to model memcpy for struct byval.
|
|
COPY_STRUCT_BYVAL,
|
|
|
|
CALL, // Function call.
|
|
CALL_PRED, // Function call that's predicable.
|
|
CALL_NOLINK, // Function call with branch not branch-and-link.
|
|
tCALL, // Thumb function call.
|
|
BRCOND, // Conditional branch.
|
|
BR_JT, // Jumptable branch.
|
|
BR2_JT, // Jumptable branch (2 level - jumptable entry is a jump).
|
|
RET_FLAG, // Return with a flag operand.
|
|
INTRET_FLAG, // Interrupt return with an LR-offset and a flag operand.
|
|
|
|
PIC_ADD, // Add with a PC operand and a PIC label.
|
|
|
|
CMP, // ARM compare instructions.
|
|
CMN, // ARM CMN instructions.
|
|
CMPZ, // ARM compare that sets only Z flag.
|
|
CMPFP, // ARM VFP compare instruction, sets FPSCR.
|
|
CMPFPw0, // ARM VFP compare against zero instruction, sets FPSCR.
|
|
FMSTAT, // ARM fmstat instruction.
|
|
|
|
CMOV, // ARM conditional move instructions.
|
|
|
|
BCC_i64,
|
|
|
|
RBIT, // ARM bitreverse instruction
|
|
|
|
FTOSI, // FP to sint within a FP register.
|
|
FTOUI, // FP to uint within a FP register.
|
|
SITOF, // sint to FP within a FP register.
|
|
UITOF, // uint to FP within a FP register.
|
|
|
|
SRL_FLAG, // V,Flag = srl_flag X -> srl X, 1 + save carry out.
|
|
SRA_FLAG, // V,Flag = sra_flag X -> sra X, 1 + save carry out.
|
|
RRX, // V = RRX X, Flag -> srl X, 1 + shift in carry flag.
|
|
|
|
ADDC, // Add with carry
|
|
ADDE, // Add using carry
|
|
SUBC, // Sub with carry
|
|
SUBE, // Sub using carry
|
|
|
|
VMOVRRD, // double to two gprs.
|
|
VMOVDRR, // Two gprs to double.
|
|
|
|
EH_SJLJ_SETJMP, // SjLj exception handling setjmp.
|
|
EH_SJLJ_LONGJMP, // SjLj exception handling longjmp.
|
|
|
|
TC_RETURN, // Tail call return pseudo.
|
|
|
|
THREAD_POINTER,
|
|
|
|
DYN_ALLOC, // Dynamic allocation on the stack.
|
|
|
|
MEMBARRIER_MCR, // Memory barrier (MCR)
|
|
|
|
PRELOAD, // Preload
|
|
|
|
WIN__CHKSTK, // Windows' __chkstk call to do stack probing.
|
|
|
|
VCEQ, // Vector compare equal.
|
|
VCEQZ, // Vector compare equal to zero.
|
|
VCGE, // Vector compare greater than or equal.
|
|
VCGEZ, // Vector compare greater than or equal to zero.
|
|
VCLEZ, // Vector compare less than or equal to zero.
|
|
VCGEU, // Vector compare unsigned greater than or equal.
|
|
VCGT, // Vector compare greater than.
|
|
VCGTZ, // Vector compare greater than zero.
|
|
VCLTZ, // Vector compare less than zero.
|
|
VCGTU, // Vector compare unsigned greater than.
|
|
VTST, // Vector test bits.
|
|
|
|
// Vector shift by immediate:
|
|
VSHL, // ...left
|
|
VSHRs, // ...right (signed)
|
|
VSHRu, // ...right (unsigned)
|
|
|
|
// Vector rounding shift by immediate:
|
|
VRSHRs, // ...right (signed)
|
|
VRSHRu, // ...right (unsigned)
|
|
VRSHRN, // ...right narrow
|
|
|
|
// Vector saturating shift by immediate:
|
|
VQSHLs, // ...left (signed)
|
|
VQSHLu, // ...left (unsigned)
|
|
VQSHLsu, // ...left (signed to unsigned)
|
|
VQSHRNs, // ...right narrow (signed)
|
|
VQSHRNu, // ...right narrow (unsigned)
|
|
VQSHRNsu, // ...right narrow (signed to unsigned)
|
|
|
|
// Vector saturating rounding shift by immediate:
|
|
VQRSHRNs, // ...right narrow (signed)
|
|
VQRSHRNu, // ...right narrow (unsigned)
|
|
VQRSHRNsu, // ...right narrow (signed to unsigned)
|
|
|
|
// Vector shift and insert:
|
|
VSLI, // ...left
|
|
VSRI, // ...right
|
|
|
|
// Vector get lane (VMOV scalar to ARM core register)
|
|
// (These are used for 8- and 16-bit element types only.)
|
|
VGETLANEu, // zero-extend vector extract element
|
|
VGETLANEs, // sign-extend vector extract element
|
|
|
|
// Vector move immediate and move negated immediate:
|
|
VMOVIMM,
|
|
VMVNIMM,
|
|
|
|
// Vector move f32 immediate:
|
|
VMOVFPIMM,
|
|
|
|
// Vector duplicate:
|
|
VDUP,
|
|
VDUPLANE,
|
|
|
|
// Vector shuffles:
|
|
VEXT, // extract
|
|
VREV64, // reverse elements within 64-bit doublewords
|
|
VREV32, // reverse elements within 32-bit words
|
|
VREV16, // reverse elements within 16-bit halfwords
|
|
VZIP, // zip (interleave)
|
|
VUZP, // unzip (deinterleave)
|
|
VTRN, // transpose
|
|
VTBL1, // 1-register shuffle with mask
|
|
VTBL2, // 2-register shuffle with mask
|
|
|
|
// Vector multiply long:
|
|
VMULLs, // ...signed
|
|
VMULLu, // ...unsigned
|
|
|
|
UMLAL, // 64bit Unsigned Accumulate Multiply
|
|
SMLAL, // 64bit Signed Accumulate Multiply
|
|
|
|
// Operands of the standard BUILD_VECTOR node are not legalized, which
|
|
// is fine if BUILD_VECTORs are always lowered to shuffles or other
|
|
// operations, but for ARM some BUILD_VECTORs are legal as-is and their
|
|
// operands need to be legalized. Define an ARM-specific version of
|
|
// BUILD_VECTOR for this purpose.
|
|
BUILD_VECTOR,
|
|
|
|
// Floating-point max and min:
|
|
FMAX,
|
|
FMIN,
|
|
VMAXNM,
|
|
VMINNM,
|
|
|
|
// Bit-field insert
|
|
BFI,
|
|
|
|
// Vector OR with immediate
|
|
VORRIMM,
|
|
// Vector AND with NOT of immediate
|
|
VBICIMM,
|
|
|
|
// Vector bitwise select
|
|
VBSL,
|
|
|
|
// Vector load N-element structure to all lanes:
|
|
VLD2DUP = ISD::FIRST_TARGET_MEMORY_OPCODE,
|
|
VLD3DUP,
|
|
VLD4DUP,
|
|
|
|
// NEON loads with post-increment base updates:
|
|
VLD1_UPD,
|
|
VLD2_UPD,
|
|
VLD3_UPD,
|
|
VLD4_UPD,
|
|
VLD2LN_UPD,
|
|
VLD3LN_UPD,
|
|
VLD4LN_UPD,
|
|
VLD2DUP_UPD,
|
|
VLD3DUP_UPD,
|
|
VLD4DUP_UPD,
|
|
|
|
// NEON stores with post-increment base updates:
|
|
VST1_UPD,
|
|
VST2_UPD,
|
|
VST3_UPD,
|
|
VST4_UPD,
|
|
VST2LN_UPD,
|
|
VST3LN_UPD,
|
|
VST4LN_UPD
|
|
};
|
|
}
|
|
|
|
/// Define some predicates that are used for node matching.
|
|
namespace ARM {
|
|
bool isBitFieldInvertedMask(unsigned v);
|
|
}
|
|
|
|
//===--------------------------------------------------------------------===//
|
|
// ARMTargetLowering - ARM Implementation of the TargetLowering interface
|
|
|
|
class ARMTargetLowering : public TargetLowering {
|
|
public:
|
|
explicit ARMTargetLowering(const TargetMachine &TM);
|
|
|
|
unsigned getJumpTableEncoding() const override;
|
|
|
|
SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override;
|
|
|
|
/// ReplaceNodeResults - Replace the results of node with an illegal result
|
|
/// type with new values built out of custom code.
|
|
///
|
|
void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue>&Results,
|
|
SelectionDAG &DAG) const override;
|
|
|
|
const char *getTargetNodeName(unsigned Opcode) const override;
|
|
|
|
bool isSelectSupported(SelectSupportKind Kind) const override {
|
|
// ARM does not support scalar condition selects on vectors.
|
|
return (Kind != ScalarCondVectorVal);
|
|
}
|
|
|
|
/// getSetCCResultType - Return the value type to use for ISD::SETCC.
|
|
EVT getSetCCResultType(LLVMContext &Context, EVT VT) const override;
|
|
|
|
MachineBasicBlock *
|
|
EmitInstrWithCustomInserter(MachineInstr *MI,
|
|
MachineBasicBlock *MBB) const override;
|
|
|
|
void AdjustInstrPostInstrSelection(MachineInstr *MI,
|
|
SDNode *Node) const override;
|
|
|
|
SDValue PerformCMOVCombine(SDNode *N, SelectionDAG &DAG) const;
|
|
SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override;
|
|
|
|
bool isDesirableToTransformToIntegerOp(unsigned Opc, EVT VT) const override;
|
|
|
|
/// allowsMisalignedMemoryAccesses - Returns true if the target allows
|
|
/// unaligned memory accesses of the specified type. Returns whether it
|
|
/// is "fast" by reference in the second argument.
|
|
bool allowsMisalignedMemoryAccesses(EVT VT, unsigned AddrSpace,
|
|
unsigned Align,
|
|
bool *Fast) const override;
|
|
|
|
EVT getOptimalMemOpType(uint64_t Size,
|
|
unsigned DstAlign, unsigned SrcAlign,
|
|
bool IsMemset, bool ZeroMemset,
|
|
bool MemcpyStrSrc,
|
|
MachineFunction &MF) const override;
|
|
|
|
using TargetLowering::isZExtFree;
|
|
bool isZExtFree(SDValue Val, EVT VT2) const override;
|
|
|
|
bool allowTruncateForTailCall(Type *Ty1, Type *Ty2) const override;
|
|
|
|
|
|
/// isLegalAddressingMode - Return true if the addressing mode represented
|
|
/// by AM is legal for this target, for a load/store of the specified type.
|
|
bool isLegalAddressingMode(const AddrMode &AM, Type *Ty) const override;
|
|
bool isLegalT2ScaledAddressingMode(const AddrMode &AM, EVT VT) const;
|
|
|
|
/// isLegalICmpImmediate - Return true if the specified immediate is legal
|
|
/// icmp immediate, that is the target has icmp instructions which can
|
|
/// compare a register against the immediate without having to materialize
|
|
/// the immediate into a register.
|
|
bool isLegalICmpImmediate(int64_t Imm) const override;
|
|
|
|
/// isLegalAddImmediate - Return true if the specified immediate is legal
|
|
/// add immediate, that is the target has add instructions which can
|
|
/// add a register and the immediate without having to materialize
|
|
/// the immediate into a register.
|
|
bool isLegalAddImmediate(int64_t Imm) const override;
|
|
|
|
/// getPreIndexedAddressParts - returns true by value, base pointer and
|
|
/// offset pointer and addressing mode by reference if the node's address
|
|
/// can be legally represented as pre-indexed load / store address.
|
|
bool getPreIndexedAddressParts(SDNode *N, SDValue &Base, SDValue &Offset,
|
|
ISD::MemIndexedMode &AM,
|
|
SelectionDAG &DAG) const override;
|
|
|
|
/// getPostIndexedAddressParts - returns true by value, base pointer and
|
|
/// offset pointer and addressing mode by reference if this node can be
|
|
/// combined with a load / store to form a post-indexed load / store.
|
|
bool getPostIndexedAddressParts(SDNode *N, SDNode *Op, SDValue &Base,
|
|
SDValue &Offset, ISD::MemIndexedMode &AM,
|
|
SelectionDAG &DAG) const override;
|
|
|
|
void computeKnownBitsForTargetNode(const SDValue Op, APInt &KnownZero,
|
|
APInt &KnownOne,
|
|
const SelectionDAG &DAG,
|
|
unsigned Depth) const override;
|
|
|
|
|
|
bool ExpandInlineAsm(CallInst *CI) const override;
|
|
|
|
ConstraintType
|
|
getConstraintType(const std::string &Constraint) const override;
|
|
|
|
/// Examine constraint string and operand type and determine a weight value.
|
|
/// The operand object must already have been set up with the operand type.
|
|
ConstraintWeight getSingleConstraintMatchWeight(
|
|
AsmOperandInfo &info, const char *constraint) const override;
|
|
|
|
std::pair<unsigned, const TargetRegisterClass*>
|
|
getRegForInlineAsmConstraint(const std::string &Constraint,
|
|
MVT VT) const override;
|
|
|
|
/// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
|
|
/// vector. If it is invalid, don't add anything to Ops. If hasMemory is
|
|
/// true it means one of the asm constraint of the inline asm instruction
|
|
/// being processed is 'm'.
|
|
void LowerAsmOperandForConstraint(SDValue Op, std::string &Constraint,
|
|
std::vector<SDValue> &Ops,
|
|
SelectionDAG &DAG) const override;
|
|
|
|
const ARMSubtarget* getSubtarget() const {
|
|
return Subtarget;
|
|
}
|
|
|
|
/// getRegClassFor - Return the register class that should be used for the
|
|
/// specified value type.
|
|
const TargetRegisterClass *getRegClassFor(MVT VT) const override;
|
|
|
|
/// getMaximalGlobalOffset - Returns the maximal possible offset which can
|
|
/// be used for loads / stores from the global.
|
|
unsigned getMaximalGlobalOffset() const override;
|
|
|
|
/// Returns true if a cast between SrcAS and DestAS is a noop.
|
|
bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
|
|
// Addrspacecasts are always noops.
|
|
return true;
|
|
}
|
|
|
|
/// createFastISel - This method returns a target specific FastISel object,
|
|
/// or null if the target does not support "fast" ISel.
|
|
FastISel *createFastISel(FunctionLoweringInfo &funcInfo,
|
|
const TargetLibraryInfo *libInfo) const override;
|
|
|
|
Sched::Preference getSchedulingPreference(SDNode *N) const override;
|
|
|
|
bool
|
|
isShuffleMaskLegal(const SmallVectorImpl<int> &M, EVT VT) const override;
|
|
bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const override;
|
|
|
|
/// isFPImmLegal - Returns true if the target can instruction select the
|
|
/// specified FP immediate natively. If false, the legalizer will
|
|
/// materialize the FP immediate as a load from a constant pool.
|
|
bool isFPImmLegal(const APFloat &Imm, EVT VT) const override;
|
|
|
|
bool getTgtMemIntrinsic(IntrinsicInfo &Info,
|
|
const CallInst &I,
|
|
unsigned Intrinsic) const override;
|
|
|
|
/// \brief Returns true if it is beneficial to convert a load of a constant
|
|
/// to just the constant itself.
|
|
bool shouldConvertConstantLoadToIntImm(const APInt &Imm,
|
|
Type *Ty) const override;
|
|
|
|
/// \brief Returns true if an argument of type Ty needs to be passed in a
|
|
/// contiguous block of registers in calling convention CallConv.
|
|
bool functionArgumentNeedsConsecutiveRegisters(
|
|
Type *Ty, CallingConv::ID CallConv, bool isVarArg) const override;
|
|
|
|
bool hasLoadLinkedStoreConditional() const override;
|
|
Instruction *makeDMB(IRBuilder<> &Builder, ARM_MB::MemBOpt Domain) const;
|
|
Value *emitLoadLinked(IRBuilder<> &Builder, Value *Addr,
|
|
AtomicOrdering Ord) const override;
|
|
Value *emitStoreConditional(IRBuilder<> &Builder, Value *Val,
|
|
Value *Addr, AtomicOrdering Ord) const override;
|
|
|
|
Instruction* emitLeadingFence(IRBuilder<> &Builder, AtomicOrdering Ord,
|
|
bool IsStore, bool IsLoad) const override;
|
|
Instruction* emitTrailingFence(IRBuilder<> &Builder, AtomicOrdering Ord,
|
|
bool IsStore, bool IsLoad) const override;
|
|
|
|
bool shouldExpandAtomicLoadInIR(LoadInst *LI) const override;
|
|
bool shouldExpandAtomicStoreInIR(StoreInst *SI) const override;
|
|
bool shouldExpandAtomicRMWInIR(AtomicRMWInst *AI) const override;
|
|
|
|
bool useLoadStackGuardNode() const override;
|
|
|
|
bool canCombineStoreAndExtract(Type *VectorTy, Value *Idx,
|
|
unsigned &Cost) const override;
|
|
|
|
protected:
|
|
std::pair<const TargetRegisterClass*, uint8_t>
|
|
findRepresentativeClass(MVT VT) const override;
|
|
|
|
private:
|
|
/// Subtarget - Keep a pointer to the ARMSubtarget around so that we can
|
|
/// make the right decision when generating code for different targets.
|
|
const ARMSubtarget *Subtarget;
|
|
|
|
const TargetRegisterInfo *RegInfo;
|
|
|
|
const InstrItineraryData *Itins;
|
|
|
|
/// ARMPCLabelIndex - Keep track of the number of ARM PC labels created.
|
|
///
|
|
unsigned ARMPCLabelIndex;
|
|
|
|
void addTypeForNEON(MVT VT, MVT PromotedLdStVT, MVT PromotedBitwiseVT);
|
|
void addDRTypeForNEON(MVT VT);
|
|
void addQRTypeForNEON(MVT VT);
|
|
std::pair<SDValue, SDValue> getARMXALUOOp(SDValue Op, SelectionDAG &DAG, SDValue &ARMcc) const;
|
|
|
|
typedef SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPassVector;
|
|
void PassF64ArgInRegs(SDLoc dl, SelectionDAG &DAG,
|
|
SDValue Chain, SDValue &Arg,
|
|
RegsToPassVector &RegsToPass,
|
|
CCValAssign &VA, CCValAssign &NextVA,
|
|
SDValue &StackPtr,
|
|
SmallVectorImpl<SDValue> &MemOpChains,
|
|
ISD::ArgFlagsTy Flags) const;
|
|
SDValue GetF64FormalArgument(CCValAssign &VA, CCValAssign &NextVA,
|
|
SDValue &Root, SelectionDAG &DAG,
|
|
SDLoc dl) const;
|
|
|
|
CallingConv::ID getEffectiveCallingConv(CallingConv::ID CC,
|
|
bool isVarArg) const;
|
|
CCAssignFn *CCAssignFnForNode(CallingConv::ID CC, bool Return,
|
|
bool isVarArg) const;
|
|
SDValue LowerMemOpCallTo(SDValue Chain, SDValue StackPtr, SDValue Arg,
|
|
SDLoc dl, SelectionDAG &DAG,
|
|
const CCValAssign &VA,
|
|
ISD::ArgFlagsTy Flags) const;
|
|
SDValue LowerEH_SJLJ_SETJMP(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerEH_SJLJ_LONGJMP(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG,
|
|
const ARMSubtarget *Subtarget) const;
|
|
SDValue LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerGlobalAddressDarwin(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerGlobalAddressELF(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerGlobalAddressWindows(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA,
|
|
SelectionDAG &DAG) const;
|
|
SDValue LowerToTLSExecModels(GlobalAddressSDNode *GA,
|
|
SelectionDAG &DAG,
|
|
TLSModel::Model model) const;
|
|
SDValue LowerGLOBAL_OFFSET_TABLE(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerBR_JT(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerXALUO(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerShiftRightParts(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerShiftLeftParts(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerFLT_ROUNDS_(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerConstantFP(SDValue Op, SelectionDAG &DAG,
|
|
const ARMSubtarget *ST) const;
|
|
SDValue LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG,
|
|
const ARMSubtarget *ST) const;
|
|
SDValue LowerFSINCOS(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerDivRem(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerFP_ROUND(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerFP_EXTEND(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG) const;
|
|
SDValue LowerINT_TO_FP(SDValue Op, SelectionDAG &DAG) const;
|
|
|
|
unsigned getRegisterByName(const char* RegName, EVT VT) const override;
|
|
|
|
/// isFMAFasterThanFMulAndFAdd - Return true if an FMA operation is faster
|
|
/// than a pair of fmul and fadd instructions. fmuladd intrinsics will be
|
|
/// expanded to FMAs when this method returns true, otherwise fmuladd is
|
|
/// expanded to fmul + fadd.
|
|
///
|
|
/// ARM supports both fused and unfused multiply-add operations; we already
|
|
/// lower a pair of fmul and fadd to the latter so it's not clear that there
|
|
/// would be a gain or that the gain would be worthwhile enough to risk
|
|
/// correctness bugs.
|
|
bool isFMAFasterThanFMulAndFAdd(EVT VT) const override { return false; }
|
|
|
|
SDValue ReconstructShuffle(SDValue Op, SelectionDAG &DAG) const;
|
|
|
|
SDValue LowerCallResult(SDValue Chain, SDValue InFlag,
|
|
CallingConv::ID CallConv, bool isVarArg,
|
|
const SmallVectorImpl<ISD::InputArg> &Ins,
|
|
SDLoc dl, SelectionDAG &DAG,
|
|
SmallVectorImpl<SDValue> &InVals,
|
|
bool isThisReturn, SDValue ThisVal) const;
|
|
|
|
SDValue
|
|
LowerFormalArguments(SDValue Chain,
|
|
CallingConv::ID CallConv, bool isVarArg,
|
|
const SmallVectorImpl<ISD::InputArg> &Ins,
|
|
SDLoc dl, SelectionDAG &DAG,
|
|
SmallVectorImpl<SDValue> &InVals) const override;
|
|
|
|
int StoreByValRegs(CCState &CCInfo, SelectionDAG &DAG,
|
|
SDLoc dl, SDValue &Chain,
|
|
const Value *OrigArg,
|
|
unsigned InRegsParamRecordIdx,
|
|
unsigned OffsetFromOrigArg,
|
|
unsigned ArgOffset,
|
|
unsigned ArgSize,
|
|
bool ForceMutable,
|
|
unsigned ByValStoreOffset,
|
|
unsigned TotalArgRegsSaveSize) const;
|
|
|
|
void VarArgStyleRegisters(CCState &CCInfo, SelectionDAG &DAG,
|
|
SDLoc dl, SDValue &Chain,
|
|
unsigned ArgOffset,
|
|
unsigned TotalArgRegsSaveSize,
|
|
bool ForceMutable = false) const;
|
|
|
|
void computeRegArea(CCState &CCInfo, MachineFunction &MF,
|
|
unsigned InRegsParamRecordIdx,
|
|
unsigned ArgSize,
|
|
unsigned &ArgRegsSize,
|
|
unsigned &ArgRegsSaveSize) const;
|
|
|
|
SDValue
|
|
LowerCall(TargetLowering::CallLoweringInfo &CLI,
|
|
SmallVectorImpl<SDValue> &InVals) const override;
|
|
|
|
/// HandleByVal - Target-specific cleanup for ByVal support.
|
|
void HandleByVal(CCState *, unsigned &, unsigned) const override;
|
|
|
|
/// IsEligibleForTailCallOptimization - Check whether the call is eligible
|
|
/// for tail call optimization. Targets which want to do tail call
|
|
/// optimization should implement this function.
|
|
bool IsEligibleForTailCallOptimization(SDValue Callee,
|
|
CallingConv::ID CalleeCC,
|
|
bool isVarArg,
|
|
bool isCalleeStructRet,
|
|
bool isCallerStructRet,
|
|
const SmallVectorImpl<ISD::OutputArg> &Outs,
|
|
const SmallVectorImpl<SDValue> &OutVals,
|
|
const SmallVectorImpl<ISD::InputArg> &Ins,
|
|
SelectionDAG& DAG) const;
|
|
|
|
bool CanLowerReturn(CallingConv::ID CallConv,
|
|
MachineFunction &MF, bool isVarArg,
|
|
const SmallVectorImpl<ISD::OutputArg> &Outs,
|
|
LLVMContext &Context) const override;
|
|
|
|
SDValue
|
|
LowerReturn(SDValue Chain,
|
|
CallingConv::ID CallConv, bool isVarArg,
|
|
const SmallVectorImpl<ISD::OutputArg> &Outs,
|
|
const SmallVectorImpl<SDValue> &OutVals,
|
|
SDLoc dl, SelectionDAG &DAG) const override;
|
|
|
|
bool isUsedByReturnOnly(SDNode *N, SDValue &Chain) const override;
|
|
|
|
bool mayBeEmittedAsTailCall(CallInst *CI) const override;
|
|
|
|
SDValue getCMOV(SDLoc dl, EVT VT, SDValue FalseVal, SDValue TrueVal,
|
|
SDValue ARMcc, SDValue CCR, SDValue Cmp,
|
|
SelectionDAG &DAG) const;
|
|
SDValue getARMCmp(SDValue LHS, SDValue RHS, ISD::CondCode CC,
|
|
SDValue &ARMcc, SelectionDAG &DAG, SDLoc dl) const;
|
|
SDValue getVFPCmp(SDValue LHS, SDValue RHS,
|
|
SelectionDAG &DAG, SDLoc dl) const;
|
|
SDValue duplicateCmp(SDValue Cmp, SelectionDAG &DAG) const;
|
|
|
|
SDValue OptimizeVFPBrcond(SDValue Op, SelectionDAG &DAG) const;
|
|
|
|
void SetupEntryBlockForSjLj(MachineInstr *MI,
|
|
MachineBasicBlock *MBB,
|
|
MachineBasicBlock *DispatchBB, int FI) const;
|
|
|
|
MachineBasicBlock *EmitSjLjDispatchBlock(MachineInstr *MI,
|
|
MachineBasicBlock *MBB) const;
|
|
|
|
bool RemapAddSubWithFlags(MachineInstr *MI, MachineBasicBlock *BB) const;
|
|
|
|
MachineBasicBlock *EmitStructByval(MachineInstr *MI,
|
|
MachineBasicBlock *MBB) const;
|
|
|
|
MachineBasicBlock *EmitLowered__chkstk(MachineInstr *MI,
|
|
MachineBasicBlock *MBB) const;
|
|
};
|
|
|
|
enum NEONModImmType {
|
|
VMOVModImm,
|
|
VMVNModImm,
|
|
OtherModImm
|
|
};
|
|
|
|
namespace ARM {
|
|
FastISel *createFastISel(FunctionLoweringInfo &funcInfo,
|
|
const TargetLibraryInfo *libInfo);
|
|
}
|
|
}
|
|
|
|
#endif // ARMISELLOWERING_H
|