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22e87bbb08
Having an enum member named Default is quite confusing: Is it distinct from the others? This patch removes that member and instead uses Optional<Reloc> in places where we have a user input that still hasn't been maped to the default value, which is now clear has no be one of the remaining 3 options. llvm-svn: 269988
83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
//===-- BPFTargetMachine.cpp - Define TargetMachine for BPF ---------------===//
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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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// Implements the info about BPF target spec.
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//
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//===----------------------------------------------------------------------===//
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#include "BPF.h"
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#include "BPFTargetMachine.h"
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#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
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#include "llvm/IR/LegacyPassManager.h"
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/CodeGen/TargetPassConfig.h"
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#include "llvm/Support/FormattedStream.h"
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#include "llvm/Support/TargetRegistry.h"
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#include "llvm/Target/TargetOptions.h"
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using namespace llvm;
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extern "C" void LLVMInitializeBPFTarget() {
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// Register the target.
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RegisterTargetMachine<BPFTargetMachine> X(TheBPFleTarget);
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RegisterTargetMachine<BPFTargetMachine> Y(TheBPFbeTarget);
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RegisterTargetMachine<BPFTargetMachine> Z(TheBPFTarget);
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}
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// DataLayout: little or big endian
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static std::string computeDataLayout(const Triple &TT) {
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if (TT.getArch() == Triple::bpfeb)
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return "E-m:e-p:64:64-i64:64-n32:64-S128";
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else
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return "e-m:e-p:64:64-i64:64-n32:64-S128";
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}
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static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
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if (!RM.hasValue())
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return Reloc::PIC_;
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return *RM;
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}
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BPFTargetMachine::BPFTargetMachine(const Target &T, const Triple &TT,
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StringRef CPU, StringRef FS,
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const TargetOptions &Options,
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Optional<Reloc::Model> RM,
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CodeModel::Model CM, CodeGenOpt::Level OL)
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: LLVMTargetMachine(T, computeDataLayout(TT), TT, CPU, FS, Options,
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getEffectiveRelocModel(RM), CM, OL),
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TLOF(make_unique<TargetLoweringObjectFileELF>()),
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Subtarget(TT, CPU, FS, *this) {
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initAsmInfo();
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}
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namespace {
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// BPF Code Generator Pass Configuration Options.
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class BPFPassConfig : public TargetPassConfig {
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public:
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BPFPassConfig(BPFTargetMachine *TM, PassManagerBase &PM)
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: TargetPassConfig(TM, PM) {}
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BPFTargetMachine &getBPFTargetMachine() const {
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return getTM<BPFTargetMachine>();
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}
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bool addInstSelector() override;
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};
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}
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TargetPassConfig *BPFTargetMachine::createPassConfig(PassManagerBase &PM) {
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return new BPFPassConfig(this, PM);
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}
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// Install an instruction selector pass using
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// the ISelDag to gen BPF code.
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bool BPFPassConfig::addInstSelector() {
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addPass(createBPFISelDag(getBPFTargetMachine()));
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return false;
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}
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