1//===-- SystemZMCExpr.h - SystemZ 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_SYSTEMZ_MCTARGETDESC_SYSTEMZMCEXPR_H
10#define LLVM_LIB_TARGET_SYSTEMZ_MCTARGETDESC_SYSTEMZMCEXPR_H
11
12#include "llvm/MC/MCExpr.h"
13#include "llvm/MC/MCStreamer.h"
14#include "llvm/MC/MCValue.h"
15
16namespace llvm {
17
18class SystemZMCExpr : public MCTargetExpr {
19public:
20// HLASM docs for address constants:
21// https://www.ibm.com/docs/en/hla-and-tf/1.6?topic=value-address-constants
22 enum VariantKind {
23 VK_SystemZ_None,
24 VK_SystemZ_RCon, // Address of ADA of symbol.
25 VK_SystemZ_VCon, // Address of external function symbol.
26 };
27
28private:
29 const VariantKind Kind;
30 const MCExpr *Expr;
31
32 explicit SystemZMCExpr(VariantKind Kind, const MCExpr *Expr)
33 : Kind(Kind), Expr(Expr) {}
34
35public:
36 static const SystemZMCExpr *create(VariantKind Kind, const MCExpr *Expr,
37 MCContext &Ctx);
38
39 /// getOpcode - Get the kind of this expression.
40 VariantKind getKind() const { return Kind; }
41
42 /// getSubExpr - Get the child of this expression.
43 const MCExpr *getSubExpr() const { return Expr; }
44
45 StringRef getVariantKindName() const;
46
47 void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
48 bool evaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm,
49 const MCFixup *Fixup) const override;
50 void visitUsedExpr(MCStreamer &Streamer) const override {
51 Streamer.visitUsedExpr(Expr: *getSubExpr());
52 }
53 MCFragment *findAssociatedFragment() const override {
54 return getSubExpr()->findAssociatedFragment();
55 }
56
57 // There are no TLS SystemZMCExprs at the moment.
58 void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override {}
59
60 static bool classof(const MCExpr *E) {
61 return E->getKind() == MCExpr::Target;
62 }
63};
64} // end namespace llvm
65
66#endif
67