1//===-- PPCMCExpr.h - PPC specific MC expression classes --------*- 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#ifndef LLVM_LIB_TARGET_POWERPC_MCTARGETDESC_PPCMCEXPR_H
10#define LLVM_LIB_TARGET_POWERPC_MCTARGETDESC_PPCMCEXPR_H
11
12#include "llvm/MC/MCAsmLayout.h"
13#include "llvm/MC/MCExpr.h"
14#include "llvm/MC/MCValue.h"
15
16namespace llvm {
17
18class PPCMCExpr : public MCTargetExpr {
19public:
20 enum VariantKind {
21 VK_PPC_None,
22 VK_PPC_LO,
23 VK_PPC_HI,
24 VK_PPC_HA,
25 VK_PPC_HIGH,
26 VK_PPC_HIGHA,
27 VK_PPC_HIGHER,
28 VK_PPC_HIGHERA,
29 VK_PPC_HIGHEST,
30 VK_PPC_HIGHESTA
31 };
32
33private:
34 const VariantKind Kind;
35 const MCExpr *Expr;
36
37 int64_t evaluateAsInt64(int64_t Value) const;
38
39 explicit PPCMCExpr(VariantKind Kind, const MCExpr *Expr)
40 : Kind(Kind), Expr(Expr) {}
41
42public:
43 /// @name Construction
44 /// @{
45
46 static const PPCMCExpr *create(VariantKind Kind, const MCExpr *Expr,
47 MCContext &Ctx);
48
49 static const PPCMCExpr *createLo(const MCExpr *Expr, MCContext &Ctx) {
50 return create(Kind: VK_PPC_LO, Expr, Ctx);
51 }
52
53 static const PPCMCExpr *createHi(const MCExpr *Expr, MCContext &Ctx) {
54 return create(Kind: VK_PPC_HI, Expr, Ctx);
55 }
56
57 static const PPCMCExpr *createHa(const MCExpr *Expr, MCContext &Ctx) {
58 return create(Kind: VK_PPC_HA, Expr, Ctx);
59 }
60
61 /// @}
62 /// @name Accessors
63 /// @{
64
65 /// getOpcode - Get the kind of this expression.
66 VariantKind getKind() const { return Kind; }
67
68 /// getSubExpr - Get the child of this expression.
69 const MCExpr *getSubExpr() const { return Expr; }
70
71 /// @}
72
73 void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
74 bool evaluateAsRelocatableImpl(MCValue &Res,
75 const MCAsmLayout *Layout,
76 const MCFixup *Fixup) const override;
77 void visitUsedExpr(MCStreamer &Streamer) const override;
78 MCFragment *findAssociatedFragment() const override {
79 return getSubExpr()->findAssociatedFragment();
80 }
81
82 // There are no TLS PPCMCExprs at the moment.
83 void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override {}
84
85 bool evaluateAsConstant(int64_t &Res) const;
86
87 static bool classof(const MCExpr *E) {
88 return E->getKind() == MCExpr::Target;
89 }
90};
91} // end namespace llvm
92
93#endif
94

source code of llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.h