clang 19.0.0git
BPF.h
Go to the documentation of this file.
1//===--- BPF.h - Declare BPF target feature support -------------*- C++ -*-===//
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 declares BPF TargetInfo objects.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_CLANG_LIB_BASIC_TARGETS_BPF_H
14#define LLVM_CLANG_LIB_BASIC_TARGETS_BPF_H
15
18#include "llvm/Support/Compiler.h"
19#include "llvm/TargetParser/Triple.h"
20
21namespace clang {
22namespace targets {
23
24class LLVM_LIBRARY_VISIBILITY BPFTargetInfo : public TargetInfo {
25 bool HasAlu32 = false;
26
27public:
28 BPFTargetInfo(const llvm::Triple &Triple, const TargetOptions &)
29 : TargetInfo(Triple) {
30 LongWidth = LongAlign = PointerWidth = PointerAlign = 64;
31 SizeType = UnsignedLong;
32 PtrDiffType = SignedLong;
33 IntPtrType = SignedLong;
34 IntMaxType = SignedLong;
35 Int64Type = SignedLong;
36 RegParmMax = 5;
37 if (Triple.getArch() == llvm::Triple::bpfeb) {
38 resetDataLayout("E-m:e-p:64:64-i64:64-i128:128-n32:64-S128");
39 } else {
40 resetDataLayout("e-m:e-p:64:64-i64:64-i128:128-n32:64-S128");
41 }
42 MaxAtomicPromoteWidth = 64;
43 MaxAtomicInlineWidth = 64;
44 TLSSupported = false;
45 }
46
47 void getTargetDefines(const LangOptions &Opts,
48 MacroBuilder &Builder) const override;
49
50 bool hasFeature(StringRef Feature) const override {
51 return Feature == "bpf" || Feature == "alu32" || Feature == "dwarfris";
52 }
53
54 void setFeatureEnabled(llvm::StringMap<bool> &Features, StringRef Name,
55 bool Enabled) const override {
56 Features[Name] = Enabled;
57 }
58 bool handleTargetFeatures(std::vector<std::string> &Features,
59 DiagnosticsEngine &Diags) override;
60
61 ArrayRef<Builtin::Info> getTargetBuiltins() const override;
62
63 std::string_view getClobbers() const override { return ""; }
64
66 return TargetInfo::VoidPtrBuiltinVaList;
67 }
68
69 bool isValidGCCRegisterName(StringRef Name) const override { return true; }
71 return std::nullopt;
72 }
73
74 bool validateAsmConstraint(const char *&Name,
75 TargetInfo::ConstraintInfo &Info) const override {
76 switch (*Name) {
77 default:
78 break;
79 case 'w':
80 if (HasAlu32) {
81 Info.setAllowsRegister();
82 }
83 break;
84 }
85 return true;
86 }
87
89 return std::nullopt;
90 }
91
92 bool allowDebugInfoForExternalRef() const override { return true; }
93
95 switch (CC) {
96 default:
97 return CCCR_Warning;
98 case CC_C:
99 case CC_OpenCLKernel:
100 return CCCR_OK;
101 }
102 }
103
104 bool isValidCPUName(StringRef Name) const override;
105
106 void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const override;
107
108 bool setCPU(const std::string &Name) override {
109 if (Name == "v3" || Name == "v4") {
110 HasAlu32 = true;
111 }
112
113 StringRef CPUName(Name);
114 return isValidCPUName(CPUName);
115 }
116
117 std::pair<unsigned, unsigned> hardwareInterferenceSizes() const override {
118 return std::make_pair(32, 32);
119 }
120};
121} // namespace targets
122} // namespace clang
123#endif // LLVM_CLANG_LIB_BASIC_TARGETS_BPF_H
Defines the clang::TargetOptions class.
Concrete class used by the front-end to report problems and issues.
Definition: Diagnostic.h:192
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:461
Exposes information about the current target.
Definition: TargetInfo.h:218
BuiltinVaListKind
The different kinds of __builtin_va_list types defined by the target implementation.
Definition: TargetInfo.h:319
Options for controlling the target.
Definition: TargetOptions.h:26
ArrayRef< TargetInfo::GCCRegAlias > getGCCRegAliases() const override
Definition: BPF.h:88
BPFTargetInfo(const llvm::Triple &Triple, const TargetOptions &)
Definition: BPF.h:28
std::string_view getClobbers() const override
Returns a string of target-specific clobbers, in LLVM format.
Definition: BPF.h:63
void setFeatureEnabled(llvm::StringMap< bool > &Features, StringRef Name, bool Enabled) const override
Enable or disable a specific target feature; the feature name must be valid.
Definition: BPF.h:54
bool setCPU(const std::string &Name) override
Target the specified CPU.
Definition: BPF.h:108
bool allowDebugInfoForExternalRef() const override
Whether target allows debuginfo types for decl only variables/functions.
Definition: BPF.h:92
bool hasFeature(StringRef Feature) const override
Determine whether the given target has the given feature.
Definition: BPF.h:50
std::pair< unsigned, unsigned > hardwareInterferenceSizes() const override
The first value in the pair is the minimum offset between two objects to avoid false sharing (destruc...
Definition: BPF.h:117
bool validateAsmConstraint(const char *&Name, TargetInfo::ConstraintInfo &Info) const override
Definition: BPF.h:74
ArrayRef< const char * > getGCCRegNames() const override
Definition: BPF.h:70
bool isValidGCCRegisterName(StringRef Name) const override
Returns whether the passed in string is a valid register name according to GCC.
Definition: BPF.h:69
CallingConvCheckResult checkCallingConvention(CallingConv CC) const override
Determines whether a given calling convention is valid for the target.
Definition: BPF.h:94
BuiltinVaListKind getBuiltinVaListKind() const override
Returns the kind of __builtin_va_list type that should be used with this target.
Definition: BPF.h:65
Defines the clang::TargetInfo interface.
The JSON file list parser is used to communicate input to InstallAPI.
CallingConv
CallingConv - Specifies the calling convention that a function uses.
Definition: Specifiers.h:275
@ CC_OpenCLKernel
Definition: Specifiers.h:289
@ CC_C
Definition: Specifiers.h:276