LLVM 17.0.0git
BPFSubtarget.cpp
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1//===-- BPFSubtarget.cpp - BPF Subtarget Information ----------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the BPF specific subclass of TargetSubtargetInfo.
10//
11//===----------------------------------------------------------------------===//
12
13#include "BPFSubtarget.h"
14#include "BPF.h"
17
18using namespace llvm;
19
20#define DEBUG_TYPE "bpf-subtarget"
21
22#define GET_SUBTARGETINFO_TARGET_DESC
23#define GET_SUBTARGETINFO_CTOR
24#include "BPFGenSubtargetInfo.inc"
25
26void BPFSubtarget::anchor() {}
27
29 StringRef FS) {
30 initializeEnvironment();
31 initSubtargetFeatures(CPU, FS);
32 ParseSubtargetFeatures(CPU, /*TuneCPU*/ CPU, FS);
33 return *this;
34}
35
36void BPFSubtarget::initializeEnvironment() {
37 HasJmpExt = false;
38 HasJmp32 = false;
39 HasAlu32 = false;
40 UseDwarfRIS = false;
41}
42
43void BPFSubtarget::initSubtargetFeatures(StringRef CPU, StringRef FS) {
44 if (CPU == "probe")
46 if (CPU == "generic" || CPU == "v1")
47 return;
48 if (CPU == "v2") {
49 HasJmpExt = true;
50 return;
51 }
52 if (CPU == "v3") {
53 HasJmpExt = true;
54 HasJmp32 = true;
55 HasAlu32 = true;
56 return;
57 }
58}
59
60BPFSubtarget::BPFSubtarget(const Triple &TT, const std::string &CPU,
61 const std::string &FS, const TargetMachine &TM)
62 : BPFGenSubtargetInfo(TT, CPU, /*TuneCPU*/ CPU, FS),
63 FrameLowering(initializeSubtargetDependencies(CPU, FS)),
64 TLInfo(TM, *this) {}
const char LLVMTargetMachineRef TM
BPFSubtarget(const Triple &TT, const std::string &CPU, const std::string &FS, const TargetMachine &TM)
BPFSubtarget & initializeSubtargetDependencies(StringRef CPU, StringRef FS)
void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS)
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
Primary interface to the complete machine description for the target machine.
Definition: TargetMachine.h:78
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
StringRef getHostCPUNameForBPF()
Definition: Host.cpp:420
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18