1 //===-- AArch64TargetMachine.cpp - Define TargetMachine for AArch64 -------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the implementation of the AArch64TargetMachine
11 // methods. Principally just setting up the passes needed to generate correct
12 // code on this architecture.
14 //===----------------------------------------------------------------------===//
17 #include "AArch64TargetMachine.h"
18 #include "MCTargetDesc/AArch64MCTargetDesc.h"
19 #include "llvm/CodeGen/Passes.h"
20 #include "llvm/PassManager.h"
21 #include "llvm/Support/TargetRegistry.h"
22 #include "llvm/Transforms/Scalar.h"
26 extern "C" void LLVMInitializeAArch64Target() {
27 RegisterTargetMachine<AArch64leTargetMachine> X(TheAArch64leTarget);
28 RegisterTargetMachine<AArch64beTargetMachine> Y(TheAArch64beTarget);
31 AArch64TargetMachine::AArch64TargetMachine(const Target &T, StringRef TT,
32 StringRef CPU, StringRef FS,
33 const TargetOptions &Options,
34 Reloc::Model RM, CodeModel::Model CM,
37 : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
38 Subtarget(TT, CPU, FS, LittleEndian),
41 "e-m:e-i64:64-i128:128-n32:64-S128" :
42 "E-m:e-i64:64-i128:128-n32:64-S128"),
45 FrameLowering(Subtarget) {
49 void AArch64leTargetMachine::anchor() { }
51 AArch64leTargetMachine::
52 AArch64leTargetMachine(const Target &T, StringRef TT,
53 StringRef CPU, StringRef FS, const TargetOptions &Options,
54 Reloc::Model RM, CodeModel::Model CM,
56 : AArch64TargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, true) {}
58 void AArch64beTargetMachine::anchor() { }
60 AArch64beTargetMachine::
61 AArch64beTargetMachine(const Target &T, StringRef TT,
62 StringRef CPU, StringRef FS, const TargetOptions &Options,
63 Reloc::Model RM, CodeModel::Model CM,
65 : AArch64TargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, false) {}
67 void AArch64TargetMachine::addAnalysisPasses(PassManagerBase &PM) {
68 // Add first the target-independent BasicTTI pass, then our AArch64 pass. This
69 // allows the AArch64 pass to delegate to the target independent layer when
71 PM.add(createBasicTargetTransformInfoPass(this));
72 PM.add(createAArch64TargetTransformInfoPass(this));
76 /// AArch64 Code Generator Pass Configuration Options.
77 class AArch64PassConfig : public TargetPassConfig {
79 AArch64PassConfig(AArch64TargetMachine *TM, PassManagerBase &PM)
80 : TargetPassConfig(TM, PM) {}
82 AArch64TargetMachine &getAArch64TargetMachine() const {
83 return getTM<AArch64TargetMachine>();
86 const AArch64Subtarget &getAArch64Subtarget() const {
87 return *getAArch64TargetMachine().getSubtargetImpl();
90 bool addPreISel() override;
91 bool addInstSelector() override;
92 bool addPreEmitPass() override;
96 bool AArch64PassConfig::addPreISel() {
97 if (TM->getOptLevel() != CodeGenOpt::None)
98 addPass(createGlobalMergePass(TM));
103 TargetPassConfig *AArch64TargetMachine::createPassConfig(PassManagerBase &PM) {
104 return new AArch64PassConfig(this, PM);
107 bool AArch64PassConfig::addPreEmitPass() {
108 addPass(&UnpackMachineBundlesID);
109 addPass(createAArch64BranchFixupPass());
113 bool AArch64PassConfig::addInstSelector() {
114 addPass(createAArch64ISelDAG(getAArch64TargetMachine(), getOptLevel()));
116 // For ELF, cleanup any local-dynamic TLS accesses.
117 if (getAArch64Subtarget().isTargetELF() && getOptLevel() != CodeGenOpt::None)
118 addPass(createAArch64CleanupLocalDynamicTLSPass());