Finalize v8.1-m low-overhead loops by converting the associated pseudo instructions into machine operations. More...
#include "ARM.h"#include "ARMBaseInstrInfo.h"#include "ARMBaseRegisterInfo.h"#include "ARMBasicBlockInfo.h"#include "ARMSubtarget.h"#include "llvm/CodeGen/MachineFunctionPass.h"#include "llvm/CodeGen/MachineLoopInfo.h"#include "llvm/CodeGen/MachineRegisterInfo.h"
Go to the source code of this file.
Macros | |
| #define | DEBUG_TYPE "arm-low-overhead-loops" |
| #define | ARM_LOW_OVERHEAD_LOOPS_NAME "ARM Low Overhead Loops pass" |
Functions | |
| INITIALIZE_PASS (ARMLowOverheadLoops, DEBUG_TYPE, ARM_LOW_OVERHEAD_LOOPS_NAME, false, false) bool ARMLowOverheadLoops | |
| static bool | IsLoopStart (MachineInstr &MI) |
| template<typename T > | |
| static MachineInstr * | SearchForDef (MachineInstr *Begin, T End, unsigned Reg) |
| static MachineInstr * | SearchForUse (MachineInstr *Begin, MachineBasicBlock::iterator End, unsigned Reg) |
Detailed Description
Finalize v8.1-m low-overhead loops by converting the associated pseudo instructions into machine operations.
The expectation is that the loop contains three pseudo instructions:
- t2*LoopStart - placed in the preheader or pre-preheader. The do-loop form should be in the preheader, whereas the while form should be in the preheaders only predecessor.
- t2LoopDec - placed within in the loop body.
- t2LoopEnd - the loop latch terminator.
Definition in file ARMLowOverheadLoops.cpp.
Macro Definition Documentation
◆ ARM_LOW_OVERHEAD_LOOPS_NAME
Definition at line 32 of file ARMLowOverheadLoops.cpp.
◆ DEBUG_TYPE
| #define DEBUG_TYPE "arm-low-overhead-loops" |
Definition at line 31 of file ARMLowOverheadLoops.cpp.
Function Documentation
◆ INITIALIZE_PASS()
| INITIALIZE_PASS | ( | ARMLowOverheadLoops | , |
| DEBUG_TYPE | , | ||
| ARM_LOW_OVERHEAD_LOOPS_NAME | , | ||
| false | , | ||
| false | |||
| ) |
Definition at line 86 of file ARMLowOverheadLoops.cpp.
References llvm::dbgs(), llvm::ARMSubtarget::getInstrInfo(), llvm::ARMSubtarget::hasLOB(), LLVM_DEBUG, MRI, llvm::ARM_MB::ST, TII, and llvm::MachineFunctionProperties::TracksLiveness.
◆ IsLoopStart()
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static |
Definition at line 114 of file ARMLowOverheadLoops.cpp.
References llvm::MachineInstr::getOpcode().
◆ SearchForDef()
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static |
Definition at line 120 of file ARMLowOverheadLoops.cpp.
◆ SearchForUse()
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static |
Definition at line 131 of file ARMLowOverheadLoops.cpp.
