forked from OSchip/llvm-project
827 lines
28 KiB
C++
827 lines
28 KiB
C++
//===-- X86Subtarget.h - Define Subtarget for the X86 ----------*- C++ -*--===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the X86 specific subclass of TargetSubtargetInfo.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_X86_X86SUBTARGET_H
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#define LLVM_LIB_TARGET_X86_X86SUBTARGET_H
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#include "X86FrameLowering.h"
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#include "X86ISelLowering.h"
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#include "X86InstrInfo.h"
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#include "X86SelectionDAGInfo.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/CodeGen/GlobalISel/CallLowering.h"
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#include "llvm/CodeGen/GlobalISel/InstructionSelector.h"
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#include "llvm/CodeGen/GlobalISel/LegalizerInfo.h"
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#include "llvm/CodeGen/GlobalISel/RegisterBankInfo.h"
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#include "llvm/CodeGen/TargetSubtargetInfo.h"
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#include "llvm/IR/CallingConv.h"
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#include "llvm/Target/TargetMachine.h"
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#include <climits>
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#include <memory>
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#define GET_SUBTARGETINFO_HEADER
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#include "X86GenSubtargetInfo.inc"
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namespace llvm {
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class GlobalValue;
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/// The X86 backend supports a number of different styles of PIC.
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///
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namespace PICStyles {
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enum Style {
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StubPIC, // Used on i386-darwin in pic mode.
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GOT, // Used on 32 bit elf on when in pic mode.
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RIPRel, // Used on X86-64 when in pic mode.
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None // Set when not in pic mode.
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};
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} // end namespace PICStyles
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class X86Subtarget final : public X86GenSubtargetInfo {
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public:
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enum X86ProcFamilyEnum {
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Others,
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IntelAtom,
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IntelSLM,
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IntelGLM,
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IntelGLP,
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IntelTRM,
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IntelHaswell,
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IntelBroadwell,
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IntelSkylake,
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IntelKNL,
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IntelSKX,
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IntelCannonlake,
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IntelIcelakeClient,
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IntelIcelakeServer,
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};
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protected:
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enum X86SSEEnum {
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NoSSE, SSE1, SSE2, SSE3, SSSE3, SSE41, SSE42, AVX, AVX2, AVX512F
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};
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enum X863DNowEnum {
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NoThreeDNow, MMX, ThreeDNow, ThreeDNowA
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};
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/// X86 processor family: Intel Atom, and others
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X86ProcFamilyEnum X86ProcFamily = Others;
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/// Which PIC style to use
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PICStyles::Style PICStyle;
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const TargetMachine &TM;
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/// SSE1, SSE2, SSE3, SSSE3, SSE41, SSE42, or none supported.
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X86SSEEnum X86SSELevel = NoSSE;
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/// MMX, 3DNow, 3DNow Athlon, or none supported.
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X863DNowEnum X863DNowLevel = NoThreeDNow;
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/// True if the processor supports X87 instructions.
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bool HasX87 = false;
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/// True if this processor has NOPL instruction
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/// (generally pentium pro+).
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bool HasNOPL = false;
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/// True if this processor has conditional move instructions
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/// (generally pentium pro+).
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bool HasCMov = false;
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/// True if the processor supports X86-64 instructions.
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bool HasX86_64 = false;
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/// True if the processor supports POPCNT.
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bool HasPOPCNT = false;
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/// True if the processor supports SSE4A instructions.
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bool HasSSE4A = false;
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/// Target has AES instructions
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bool HasAES = false;
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bool HasVAES = false;
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/// Target has FXSAVE/FXRESTOR instructions
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bool HasFXSR = false;
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/// Target has XSAVE instructions
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bool HasXSAVE = false;
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/// Target has XSAVEOPT instructions
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bool HasXSAVEOPT = false;
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/// Target has XSAVEC instructions
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bool HasXSAVEC = false;
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/// Target has XSAVES instructions
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bool HasXSAVES = false;
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/// Target has carry-less multiplication
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bool HasPCLMUL = false;
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bool HasVPCLMULQDQ = false;
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/// Target has Galois Field Arithmetic instructions
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bool HasGFNI = false;
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/// Target has 3-operand fused multiply-add
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bool HasFMA = false;
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/// Target has 4-operand fused multiply-add
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bool HasFMA4 = false;
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/// Target has XOP instructions
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bool HasXOP = false;
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/// Target has TBM instructions.
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bool HasTBM = false;
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/// Target has LWP instructions
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bool HasLWP = false;
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/// True if the processor has the MOVBE instruction.
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bool HasMOVBE = false;
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/// True if the processor has the RDRAND instruction.
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bool HasRDRAND = false;
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/// Processor has 16-bit floating point conversion instructions.
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bool HasF16C = false;
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/// Processor has FS/GS base insturctions.
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bool HasFSGSBase = false;
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/// Processor has LZCNT instruction.
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bool HasLZCNT = false;
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/// Processor has BMI1 instructions.
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bool HasBMI = false;
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/// Processor has BMI2 instructions.
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bool HasBMI2 = false;
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/// Processor has VBMI instructions.
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bool HasVBMI = false;
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/// Processor has VBMI2 instructions.
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bool HasVBMI2 = false;
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/// Processor has Integer Fused Multiply Add
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bool HasIFMA = false;
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/// Processor has RTM instructions.
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bool HasRTM = false;
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/// Processor has ADX instructions.
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bool HasADX = false;
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/// Processor has SHA instructions.
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bool HasSHA = false;
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/// Processor has PRFCHW instructions.
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bool HasPRFCHW = false;
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/// Processor has RDSEED instructions.
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bool HasRDSEED = false;
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/// Processor has LAHF/SAHF instructions.
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bool HasLAHFSAHF = false;
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/// Processor has MONITORX/MWAITX instructions.
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bool HasMWAITX = false;
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/// Processor has Cache Line Zero instruction
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bool HasCLZERO = false;
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/// Processor has Cache Line Demote instruction
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bool HasCLDEMOTE = false;
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/// Processor has MOVDIRI instruction (direct store integer).
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bool HasMOVDIRI = false;
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/// Processor has MOVDIR64B instruction (direct store 64 bytes).
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bool HasMOVDIR64B = false;
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/// Processor has ptwrite instruction.
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bool HasPTWRITE = false;
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/// Processor has Prefetch with intent to Write instruction
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bool HasPREFETCHWT1 = false;
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/// True if SHLD instructions are slow.
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bool IsSHLDSlow = false;
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/// True if the PMULLD instruction is slow compared to PMULLW/PMULHW and
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// PMULUDQ.
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bool IsPMULLDSlow = false;
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/// True if unaligned memory accesses of 16-bytes are slow.
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bool IsUAMem16Slow = false;
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/// True if unaligned memory accesses of 32-bytes are slow.
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bool IsUAMem32Slow = false;
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/// True if SSE operations can have unaligned memory operands.
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/// This may require setting a configuration bit in the processor.
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bool HasSSEUnalignedMem = false;
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/// True if this processor has the CMPXCHG16B instruction;
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/// this is true for most x86-64 chips, but not the first AMD chips.
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bool HasCmpxchg16b = false;
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/// True if the LEA instruction should be used for adjusting
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/// the stack pointer. This is an optimization for Intel Atom processors.
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bool UseLeaForSP = false;
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/// True if POPCNT instruction has a false dependency on the destination register.
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bool HasPOPCNTFalseDeps = false;
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/// True if LZCNT/TZCNT instructions have a false dependency on the destination register.
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bool HasLZCNTFalseDeps = false;
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/// True if its preferable to combine to a single shuffle using a variable
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/// mask over multiple fixed shuffles.
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bool HasFastVariableShuffle = false;
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/// True if there is no performance penalty to writing only the lower parts
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/// of a YMM or ZMM register without clearing the upper part.
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bool HasFastPartialYMMorZMMWrite = false;
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/// True if there is no performance penalty for writing NOPs with up to
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/// 11 bytes.
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bool HasFast11ByteNOP = false;
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/// True if there is no performance penalty for writing NOPs with up to
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/// 15 bytes.
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bool HasFast15ByteNOP = false;
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/// True if gather is reasonably fast. This is true for Skylake client and
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/// all AVX-512 CPUs.
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bool HasFastGather = false;
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/// True if hardware SQRTSS instruction is at least as fast (latency) as
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/// RSQRTSS followed by a Newton-Raphson iteration.
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bool HasFastScalarFSQRT = false;
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/// True if hardware SQRTPS/VSQRTPS instructions are at least as fast
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/// (throughput) as RSQRTPS/VRSQRTPS followed by a Newton-Raphson iteration.
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bool HasFastVectorFSQRT = false;
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/// True if 8-bit divisions are significantly faster than
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/// 32-bit divisions and should be used when possible.
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bool HasSlowDivide32 = false;
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/// True if 32-bit divides are significantly faster than
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/// 64-bit divisions and should be used when possible.
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bool HasSlowDivide64 = false;
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/// True if LZCNT instruction is fast.
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bool HasFastLZCNT = false;
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/// True if SHLD based rotate is fast.
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bool HasFastSHLDRotate = false;
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/// True if the processor supports macrofusion.
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bool HasMacroFusion = false;
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/// True if the processor has enhanced REP MOVSB/STOSB.
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bool HasERMSB = false;
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/// True if the short functions should be padded to prevent
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/// a stall when returning too early.
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bool PadShortFunctions = false;
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/// True if two memory operand instructions should use a temporary register
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/// instead.
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bool SlowTwoMemOps = false;
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/// True if the LEA instruction inputs have to be ready at address generation
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/// (AG) time.
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bool LEAUsesAG = false;
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/// True if the LEA instruction with certain arguments is slow
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bool SlowLEA = false;
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/// True if the LEA instruction has all three source operands: base, index,
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/// and offset or if the LEA instruction uses base and index registers where
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/// the base is EBP, RBP,or R13
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bool Slow3OpsLEA = false;
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/// True if INC and DEC instructions are slow when writing to flags
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bool SlowIncDec = false;
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/// Processor has AVX-512 PreFetch Instructions
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bool HasPFI = false;
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/// Processor has AVX-512 Exponential and Reciprocal Instructions
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bool HasERI = false;
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/// Processor has AVX-512 Conflict Detection Instructions
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bool HasCDI = false;
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/// Processor has AVX-512 population count Instructions
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bool HasVPOPCNTDQ = false;
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/// Processor has AVX-512 Doubleword and Quadword instructions
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bool HasDQI = false;
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/// Processor has AVX-512 Byte and Word instructions
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bool HasBWI = false;
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/// Processor has AVX-512 Vector Length eXtenstions
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bool HasVLX = false;
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/// Processor has PKU extenstions
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bool HasPKU = false;
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/// Processor has AVX-512 Vector Neural Network Instructions
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bool HasVNNI = false;
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/// Processor has AVX-512 Bit Algorithms instructions
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bool HasBITALG = false;
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/// Processor supports MPX - Memory Protection Extensions
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bool HasMPX = false;
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/// Processor supports CET SHSTK - Control-Flow Enforcement Technology
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/// using Shadow Stack
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bool HasSHSTK = false;
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/// Processor supports Invalidate Process-Context Identifier
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bool HasINVPCID = false;
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/// Processor has Software Guard Extensions
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bool HasSGX = false;
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/// Processor supports Flush Cache Line instruction
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bool HasCLFLUSHOPT = false;
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/// Processor supports Cache Line Write Back instruction
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bool HasCLWB = false;
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/// Processor supports Write Back No Invalidate instruction
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bool HasWBNOINVD = false;
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/// Processor support RDPID instruction
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bool HasRDPID = false;
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/// Processor supports WaitPKG instructions
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bool HasWAITPKG = false;
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/// Processor supports PCONFIG instruction
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bool HasPCONFIG = false;
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/// Use a retpoline thunk rather than indirect calls to block speculative
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/// execution.
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bool UseRetpoline = false;
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/// When using a retpoline thunk, call an externally provided thunk rather
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/// than emitting one inside the compiler.
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bool UseRetpolineExternalThunk = false;
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/// Use software floating point for code generation.
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bool UseSoftFloat = false;
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/// The minimum alignment known to hold of the stack frame on
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/// entry to the function and which must be maintained by every function.
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unsigned stackAlignment = 4;
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/// Max. memset / memcpy size that is turned into rep/movs, rep/stos ops.
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///
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// FIXME: this is a known good value for Yonah. How about others?
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unsigned MaxInlineSizeThreshold = 128;
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/// Indicates target prefers 256 bit instructions.
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bool Prefer256Bit = false;
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/// What processor and OS we're targeting.
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Triple TargetTriple;
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/// GlobalISel related APIs.
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std::unique_ptr<CallLowering> CallLoweringInfo;
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std::unique_ptr<LegalizerInfo> Legalizer;
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std::unique_ptr<RegisterBankInfo> RegBankInfo;
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std::unique_ptr<InstructionSelector> InstSelector;
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private:
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/// Override the stack alignment.
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unsigned StackAlignOverride;
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/// Preferred vector width from function attribute.
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unsigned PreferVectorWidthOverride;
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/// Resolved preferred vector width from function attribute and subtarget
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/// features.
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unsigned PreferVectorWidth = UINT32_MAX;
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/// Required vector width from function attribute.
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unsigned RequiredVectorWidth;
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/// True if compiling for 64-bit, false for 16-bit or 32-bit.
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bool In64BitMode;
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/// True if compiling for 32-bit, false for 16-bit or 64-bit.
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bool In32BitMode;
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/// True if compiling for 16-bit, false for 32-bit or 64-bit.
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bool In16BitMode;
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/// Contains the Overhead of gather\scatter instructions
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int GatherOverhead = 1024;
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int ScatterOverhead = 1024;
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X86SelectionDAGInfo TSInfo;
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// Ordering here is important. X86InstrInfo initializes X86RegisterInfo which
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// X86TargetLowering needs.
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X86InstrInfo InstrInfo;
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X86TargetLowering TLInfo;
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X86FrameLowering FrameLowering;
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public:
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/// This constructor initializes the data members to match that
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/// of the specified triple.
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///
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X86Subtarget(const Triple &TT, StringRef CPU, StringRef FS,
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const X86TargetMachine &TM, unsigned StackAlignOverride,
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unsigned PreferVectorWidthOverride,
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unsigned RequiredVectorWidth);
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const X86TargetLowering *getTargetLowering() const override {
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return &TLInfo;
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}
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const X86InstrInfo *getInstrInfo() const override { return &InstrInfo; }
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const X86FrameLowering *getFrameLowering() const override {
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return &FrameLowering;
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}
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const X86SelectionDAGInfo *getSelectionDAGInfo() const override {
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return &TSInfo;
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}
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const X86RegisterInfo *getRegisterInfo() const override {
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return &getInstrInfo()->getRegisterInfo();
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}
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/// Returns the minimum alignment known to hold of the
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/// stack frame on entry to the function and which must be maintained by every
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/// function for this subtarget.
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unsigned getStackAlignment() const { return stackAlignment; }
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/// Returns the maximum memset / memcpy size
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/// that still makes it profitable to inline the call.
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unsigned getMaxInlineSizeThreshold() const { return MaxInlineSizeThreshold; }
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/// ParseSubtargetFeatures - Parses features string setting specified
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/// subtarget options. Definition of function is auto generated by tblgen.
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void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
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/// Methods used by Global ISel
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const CallLowering *getCallLowering() const override;
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const InstructionSelector *getInstructionSelector() const override;
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const LegalizerInfo *getLegalizerInfo() const override;
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const RegisterBankInfo *getRegBankInfo() const override;
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private:
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/// Initialize the full set of dependencies so we can use an initializer
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/// list for X86Subtarget.
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X86Subtarget &initializeSubtargetDependencies(StringRef CPU, StringRef FS);
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void initSubtargetFeatures(StringRef CPU, StringRef FS);
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public:
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/// Is this x86_64? (disregarding specific ABI / programming model)
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bool is64Bit() const {
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return In64BitMode;
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}
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bool is32Bit() const {
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return In32BitMode;
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}
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bool is16Bit() const {
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return In16BitMode;
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}
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/// Is this x86_64 with the ILP32 programming model (x32 ABI)?
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bool isTarget64BitILP32() const {
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return In64BitMode && (TargetTriple.getEnvironment() == Triple::GNUX32 ||
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TargetTriple.isOSNaCl());
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}
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/// Is this x86_64 with the LP64 programming model (standard AMD64, no x32)?
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bool isTarget64BitLP64() const {
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return In64BitMode && (TargetTriple.getEnvironment() != Triple::GNUX32 &&
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!TargetTriple.isOSNaCl());
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}
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PICStyles::Style getPICStyle() const { return PICStyle; }
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void setPICStyle(PICStyles::Style Style) { PICStyle = Style; }
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bool hasX87() const { return HasX87; }
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bool hasNOPL() const { return HasNOPL; }
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bool hasCMov() const { return HasCMov; }
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bool hasSSE1() const { return X86SSELevel >= SSE1; }
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bool hasSSE2() const { return X86SSELevel >= SSE2; }
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bool hasSSE3() const { return X86SSELevel >= SSE3; }
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bool hasSSSE3() const { return X86SSELevel >= SSSE3; }
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bool hasSSE41() const { return X86SSELevel >= SSE41; }
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bool hasSSE42() const { return X86SSELevel >= SSE42; }
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bool hasAVX() const { return X86SSELevel >= AVX; }
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bool hasAVX2() const { return X86SSELevel >= AVX2; }
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bool hasAVX512() const { return X86SSELevel >= AVX512F; }
|
|
bool hasInt256() const { return hasAVX2(); }
|
|
bool hasSSE4A() const { return HasSSE4A; }
|
|
bool hasMMX() const { return X863DNowLevel >= MMX; }
|
|
bool has3DNow() const { return X863DNowLevel >= ThreeDNow; }
|
|
bool has3DNowA() const { return X863DNowLevel >= ThreeDNowA; }
|
|
bool hasPOPCNT() const { return HasPOPCNT; }
|
|
bool hasAES() const { return HasAES; }
|
|
bool hasVAES() const { return HasVAES; }
|
|
bool hasFXSR() const { return HasFXSR; }
|
|
bool hasXSAVE() const { return HasXSAVE; }
|
|
bool hasXSAVEOPT() const { return HasXSAVEOPT; }
|
|
bool hasXSAVEC() const { return HasXSAVEC; }
|
|
bool hasXSAVES() const { return HasXSAVES; }
|
|
bool hasPCLMUL() const { return HasPCLMUL; }
|
|
bool hasVPCLMULQDQ() const { return HasVPCLMULQDQ; }
|
|
bool hasGFNI() const { return HasGFNI; }
|
|
// Prefer FMA4 to FMA - its better for commutation/memory folding and
|
|
// has equal or better performance on all supported targets.
|
|
bool hasFMA() const { return HasFMA; }
|
|
bool hasFMA4() const { return HasFMA4; }
|
|
bool hasAnyFMA() const { return hasFMA() || hasFMA4(); }
|
|
bool hasXOP() const { return HasXOP; }
|
|
bool hasTBM() const { return HasTBM; }
|
|
bool hasLWP() const { return HasLWP; }
|
|
bool hasMOVBE() const { return HasMOVBE; }
|
|
bool hasRDRAND() const { return HasRDRAND; }
|
|
bool hasF16C() const { return HasF16C; }
|
|
bool hasFSGSBase() const { return HasFSGSBase; }
|
|
bool hasLZCNT() const { return HasLZCNT; }
|
|
bool hasBMI() const { return HasBMI; }
|
|
bool hasBMI2() const { return HasBMI2; }
|
|
bool hasVBMI() const { return HasVBMI; }
|
|
bool hasVBMI2() const { return HasVBMI2; }
|
|
bool hasIFMA() const { return HasIFMA; }
|
|
bool hasRTM() const { return HasRTM; }
|
|
bool hasADX() const { return HasADX; }
|
|
bool hasSHA() const { return HasSHA; }
|
|
bool hasPRFCHW() const { return HasPRFCHW || HasPREFETCHWT1; }
|
|
bool hasPREFETCHWT1() const { return HasPREFETCHWT1; }
|
|
bool hasSSEPrefetch() const {
|
|
// We implicitly enable these when we have a write prefix supporting cache
|
|
// level OR if we have prfchw, but don't already have a read prefetch from
|
|
// 3dnow.
|
|
return hasSSE1() || (hasPRFCHW() && !has3DNow()) || hasPREFETCHWT1();
|
|
}
|
|
bool hasRDSEED() const { return HasRDSEED; }
|
|
bool hasLAHFSAHF() const { return HasLAHFSAHF; }
|
|
bool hasMWAITX() const { return HasMWAITX; }
|
|
bool hasCLZERO() const { return HasCLZERO; }
|
|
bool hasCLDEMOTE() const { return HasCLDEMOTE; }
|
|
bool hasMOVDIRI() const { return HasMOVDIRI; }
|
|
bool hasMOVDIR64B() const { return HasMOVDIR64B; }
|
|
bool hasPTWRITE() const { return HasPTWRITE; }
|
|
bool isSHLDSlow() const { return IsSHLDSlow; }
|
|
bool isPMULLDSlow() const { return IsPMULLDSlow; }
|
|
bool isUnalignedMem16Slow() const { return IsUAMem16Slow; }
|
|
bool isUnalignedMem32Slow() const { return IsUAMem32Slow; }
|
|
int getGatherOverhead() const { return GatherOverhead; }
|
|
int getScatterOverhead() const { return ScatterOverhead; }
|
|
bool hasSSEUnalignedMem() const { return HasSSEUnalignedMem; }
|
|
bool hasCmpxchg16b() const { return HasCmpxchg16b; }
|
|
bool useLeaForSP() const { return UseLeaForSP; }
|
|
bool hasPOPCNTFalseDeps() const { return HasPOPCNTFalseDeps; }
|
|
bool hasLZCNTFalseDeps() const { return HasLZCNTFalseDeps; }
|
|
bool hasFastVariableShuffle() const {
|
|
return HasFastVariableShuffle;
|
|
}
|
|
bool hasFastPartialYMMorZMMWrite() const {
|
|
return HasFastPartialYMMorZMMWrite;
|
|
}
|
|
bool hasFastGather() const { return HasFastGather; }
|
|
bool hasFastScalarFSQRT() const { return HasFastScalarFSQRT; }
|
|
bool hasFastVectorFSQRT() const { return HasFastVectorFSQRT; }
|
|
bool hasFastLZCNT() const { return HasFastLZCNT; }
|
|
bool hasFastSHLDRotate() const { return HasFastSHLDRotate; }
|
|
bool hasMacroFusion() const { return HasMacroFusion; }
|
|
bool hasERMSB() const { return HasERMSB; }
|
|
bool hasSlowDivide32() const { return HasSlowDivide32; }
|
|
bool hasSlowDivide64() const { return HasSlowDivide64; }
|
|
bool padShortFunctions() const { return PadShortFunctions; }
|
|
bool slowTwoMemOps() const { return SlowTwoMemOps; }
|
|
bool LEAusesAG() const { return LEAUsesAG; }
|
|
bool slowLEA() const { return SlowLEA; }
|
|
bool slow3OpsLEA() const { return Slow3OpsLEA; }
|
|
bool slowIncDec() const { return SlowIncDec; }
|
|
bool hasCDI() const { return HasCDI; }
|
|
bool hasVPOPCNTDQ() const { return HasVPOPCNTDQ; }
|
|
bool hasPFI() const { return HasPFI; }
|
|
bool hasERI() const { return HasERI; }
|
|
bool hasDQI() const { return HasDQI; }
|
|
bool hasBWI() const { return HasBWI; }
|
|
bool hasVLX() const { return HasVLX; }
|
|
bool hasPKU() const { return HasPKU; }
|
|
bool hasVNNI() const { return HasVNNI; }
|
|
bool hasBITALG() const { return HasBITALG; }
|
|
bool hasMPX() const { return HasMPX; }
|
|
bool hasSHSTK() const { return HasSHSTK; }
|
|
bool hasCLFLUSHOPT() const { return HasCLFLUSHOPT; }
|
|
bool hasCLWB() const { return HasCLWB; }
|
|
bool hasWBNOINVD() const { return HasWBNOINVD; }
|
|
bool hasRDPID() const { return HasRDPID; }
|
|
bool hasWAITPKG() const { return HasWAITPKG; }
|
|
bool hasPCONFIG() const { return HasPCONFIG; }
|
|
bool hasSGX() const { return HasSGX; }
|
|
bool hasINVPCID() const { return HasINVPCID; }
|
|
bool useRetpoline() const { return UseRetpoline; }
|
|
bool useRetpolineExternalThunk() const { return UseRetpolineExternalThunk; }
|
|
|
|
unsigned getPreferVectorWidth() const { return PreferVectorWidth; }
|
|
unsigned getRequiredVectorWidth() const { return RequiredVectorWidth; }
|
|
|
|
// Helper functions to determine when we should allow widening to 512-bit
|
|
// during codegen.
|
|
// TODO: Currently we're always allowing widening on CPUs without VLX,
|
|
// because for many cases we don't have a better option.
|
|
bool canExtendTo512DQ() const {
|
|
return hasAVX512() && (!hasVLX() || getPreferVectorWidth() >= 512);
|
|
}
|
|
bool canExtendTo512BW() const {
|
|
return hasBWI() && canExtendTo512DQ();
|
|
}
|
|
|
|
// If there are no 512-bit vectors and we prefer not to use 512-bit registers,
|
|
// disable them in the legalizer.
|
|
bool useAVX512Regs() const {
|
|
return hasAVX512() && (canExtendTo512DQ() || RequiredVectorWidth > 256);
|
|
}
|
|
|
|
bool useBWIRegs() const {
|
|
return hasBWI() && useAVX512Regs();
|
|
}
|
|
|
|
bool isXRaySupported() const override { return is64Bit(); }
|
|
|
|
X86ProcFamilyEnum getProcFamily() const { return X86ProcFamily; }
|
|
|
|
/// TODO: to be removed later and replaced with suitable properties
|
|
bool isAtom() const { return X86ProcFamily == IntelAtom; }
|
|
bool isSLM() const { return X86ProcFamily == IntelSLM; }
|
|
bool isGLM() const {
|
|
return X86ProcFamily == IntelGLM ||
|
|
X86ProcFamily == IntelGLP ||
|
|
X86ProcFamily == IntelTRM;
|
|
}
|
|
bool useSoftFloat() const { return UseSoftFloat; }
|
|
|
|
/// Use mfence if we have SSE2 or we're on x86-64 (even if we asked for
|
|
/// no-sse2). There isn't any reason to disable it if the target processor
|
|
/// supports it.
|
|
bool hasMFence() const { return hasSSE2() || is64Bit(); }
|
|
|
|
const Triple &getTargetTriple() const { return TargetTriple; }
|
|
|
|
bool isTargetDarwin() const { return TargetTriple.isOSDarwin(); }
|
|
bool isTargetFreeBSD() const { return TargetTriple.isOSFreeBSD(); }
|
|
bool isTargetDragonFly() const { return TargetTriple.isOSDragonFly(); }
|
|
bool isTargetSolaris() const { return TargetTriple.isOSSolaris(); }
|
|
bool isTargetPS4() const { return TargetTriple.isPS4CPU(); }
|
|
|
|
bool isTargetELF() const { return TargetTriple.isOSBinFormatELF(); }
|
|
bool isTargetCOFF() const { return TargetTriple.isOSBinFormatCOFF(); }
|
|
bool isTargetMachO() const { return TargetTriple.isOSBinFormatMachO(); }
|
|
|
|
bool isTargetLinux() const { return TargetTriple.isOSLinux(); }
|
|
bool isTargetKFreeBSD() const { return TargetTriple.isOSKFreeBSD(); }
|
|
bool isTargetGlibc() const { return TargetTriple.isOSGlibc(); }
|
|
bool isTargetAndroid() const { return TargetTriple.isAndroid(); }
|
|
bool isTargetNaCl() const { return TargetTriple.isOSNaCl(); }
|
|
bool isTargetNaCl32() const { return isTargetNaCl() && !is64Bit(); }
|
|
bool isTargetNaCl64() const { return isTargetNaCl() && is64Bit(); }
|
|
bool isTargetMCU() const { return TargetTriple.isOSIAMCU(); }
|
|
bool isTargetFuchsia() const { return TargetTriple.isOSFuchsia(); }
|
|
|
|
bool isTargetWindowsMSVC() const {
|
|
return TargetTriple.isWindowsMSVCEnvironment();
|
|
}
|
|
|
|
bool isTargetKnownWindowsMSVC() const {
|
|
return TargetTriple.isKnownWindowsMSVCEnvironment();
|
|
}
|
|
|
|
bool isTargetWindowsCoreCLR() const {
|
|
return TargetTriple.isWindowsCoreCLREnvironment();
|
|
}
|
|
|
|
bool isTargetWindowsCygwin() const {
|
|
return TargetTriple.isWindowsCygwinEnvironment();
|
|
}
|
|
|
|
bool isTargetWindowsGNU() const {
|
|
return TargetTriple.isWindowsGNUEnvironment();
|
|
}
|
|
|
|
bool isTargetWindowsItanium() const {
|
|
return TargetTriple.isWindowsItaniumEnvironment();
|
|
}
|
|
|
|
bool isTargetCygMing() const { return TargetTriple.isOSCygMing(); }
|
|
|
|
bool isOSWindows() const { return TargetTriple.isOSWindows(); }
|
|
|
|
bool isTargetWin64() const { return In64BitMode && isOSWindows(); }
|
|
|
|
bool isTargetWin32() const { return !In64BitMode && isOSWindows(); }
|
|
|
|
bool isPICStyleGOT() const { return PICStyle == PICStyles::GOT; }
|
|
bool isPICStyleRIPRel() const { return PICStyle == PICStyles::RIPRel; }
|
|
|
|
bool isPICStyleStubPIC() const {
|
|
return PICStyle == PICStyles::StubPIC;
|
|
}
|
|
|
|
bool isPositionIndependent() const { return TM.isPositionIndependent(); }
|
|
|
|
bool isCallingConvWin64(CallingConv::ID CC) const {
|
|
switch (CC) {
|
|
// On Win64, all these conventions just use the default convention.
|
|
case CallingConv::C:
|
|
case CallingConv::Fast:
|
|
case CallingConv::Swift:
|
|
case CallingConv::X86_FastCall:
|
|
case CallingConv::X86_StdCall:
|
|
case CallingConv::X86_ThisCall:
|
|
case CallingConv::X86_VectorCall:
|
|
case CallingConv::Intel_OCL_BI:
|
|
return isTargetWin64();
|
|
// This convention allows using the Win64 convention on other targets.
|
|
case CallingConv::Win64:
|
|
return true;
|
|
// This convention allows using the SysV convention on Windows targets.
|
|
case CallingConv::X86_64_SysV:
|
|
return false;
|
|
// Otherwise, who knows what this is.
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/// Classify a global variable reference for the current subtarget according
|
|
/// to how we should reference it in a non-pcrel context.
|
|
unsigned char classifyLocalReference(const GlobalValue *GV) const;
|
|
|
|
unsigned char classifyGlobalReference(const GlobalValue *GV,
|
|
const Module &M) const;
|
|
unsigned char classifyGlobalReference(const GlobalValue *GV) const;
|
|
|
|
/// Classify a global function reference for the current subtarget.
|
|
unsigned char classifyGlobalFunctionReference(const GlobalValue *GV,
|
|
const Module &M) const;
|
|
unsigned char classifyGlobalFunctionReference(const GlobalValue *GV) const;
|
|
|
|
/// Classify a blockaddress reference for the current subtarget according to
|
|
/// how we should reference it in a non-pcrel context.
|
|
unsigned char classifyBlockAddressReference() const;
|
|
|
|
/// Return true if the subtarget allows calls to immediate address.
|
|
bool isLegalToCallImmediateAddr() const;
|
|
|
|
/// If we are using retpolines, we need to expand indirectbr to avoid it
|
|
/// lowering to an actual indirect jump.
|
|
bool enableIndirectBrExpand() const override { return useRetpoline(); }
|
|
|
|
/// Enable the MachineScheduler pass for all X86 subtargets.
|
|
bool enableMachineScheduler() const override { return true; }
|
|
|
|
// TODO: Update the regression tests and return true.
|
|
bool supportPrintSchedInfo() const override { return false; }
|
|
|
|
bool enableEarlyIfConversion() const override;
|
|
|
|
AntiDepBreakMode getAntiDepBreakMode() const override {
|
|
return TargetSubtargetInfo::ANTIDEP_CRITICAL;
|
|
}
|
|
|
|
bool enableAdvancedRASplitCost() const override { return true; }
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif // LLVM_LIB_TARGET_X86_X86SUBTARGET_H
|