X86MacroFusion.cpp File Reference

#include "X86MacroFusion.h"
#include "MCTargetDesc/X86BaseInfo.h"
#include "X86Subtarget.h"
#include "llvm/CodeGen/MacroFusion.h"
#include "llvm/CodeGen/ScheduleDAGMutation.h"
#include "llvm/CodeGen/TargetInstrInfo.h"

Go to the source code of this file.

Namespaces
namespace	llvm
	This is an optimization pass for GlobalISel generic memory operations.

Functions
static X86::FirstMacroFusionInstKind	classifyFirst (const MachineInstr &MI)
static X86::SecondMacroFusionInstKind	classifySecond (const MachineInstr &MI)
static bool	shouldScheduleAdjacent (const TargetInstrInfo &TII, const TargetSubtargetInfo &TSI, const MachineInstr *FirstMI, const MachineInstr &SecondMI)
	Check if the instr pair, FirstMI and SecondMI, should be fused together.
std::unique_ptr< ScheduleDAGMutation >	llvm::createX86MacroFusionDAGMutation ()
	Note that you have to add: DAG.addMutation(createX86MacroFusionDAGMutation()); to X86TargetMachine::createMachineScheduler() to have an effect.

Function Documentation

classifyFirst()

X86::FirstMacroFusionInstKind classifyFirst ( const MachineInstr & MI )

static

Definition at line 23 of file X86MacroFusion.cpp.

References llvm::X86::classifyFirstOpcodeInMacroFusion(), and MI.

Referenced by shouldScheduleAdjacent().

classifySecond()

X86::SecondMacroFusionInstKind classifySecond ( const MachineInstr & MI )

static

Definition at line 27 of file X86MacroFusion.cpp.

References llvm::X86::classifySecondCondCodeInMacroFusion(), llvm::X86::getCondFromBranch(), and MI.

Referenced by shouldScheduleAdjacent().

shouldScheduleAdjacent()

bool shouldScheduleAdjacent ( const TargetInstrInfo & TII, const TargetSubtargetInfo & TSI, const MachineInstr * FirstMI, const MachineInstr & SecondMI )

static

Check if the instr pair, FirstMI and SecondMI, should be fused together.

Given SecondMI, when FirstMI is unspecified, then check if SecondMI may be part of a fused pair at all.

Definition at line 35 of file X86MacroFusion.cpp.

References classifyFirst(), classifySecond(), llvm::X86::Cmp, llvm::X86::Invalid, llvm::X86::isMacroFused(), llvm_unreachable, llvm::X86::Test, and TII.