8981298535
This cleans up @l @ha optimization in PPCAsmParser and is also the first step toward removing VK_PPC_* from the generic MCSymbolRefExpr::VariantKind. Basically we ensure that @l @ha family modifiers always lead to PPCMCExpr and avoid MCSymbolRefExpr::VariantKind. This allows us to delete a lot of switch statements that involve a long list of VK_PPC_LO/VK_PPC_HI/...
95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
//===-- PPCMCExpr.h - PPC specific MC expression classes --------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_POWERPC_MCTARGETDESC_PPCMCEXPR_H
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#define LLVM_LIB_TARGET_POWERPC_MCTARGETDESC_PPCMCEXPR_H
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCValue.h"
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#include <optional>
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namespace llvm {
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class PPCMCExpr : public MCTargetExpr {
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public:
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enum VariantKind {
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VK_PPC_None,
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// We currently use both MCSymbolRefExpr::VariantKind and
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// PPCMCExpr::VariantKind. Start at a larger number to avoid conflicts.
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VK_PPC_LO = 200,
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VK_PPC_HI,
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VK_PPC_HA,
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VK_PPC_HIGH,
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VK_PPC_HIGHA,
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VK_PPC_HIGHER,
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VK_PPC_HIGHERA,
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VK_PPC_HIGHEST,
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VK_PPC_HIGHESTA
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};
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private:
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const VariantKind Kind;
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const MCExpr *Expr;
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std::optional<int64_t> evaluateAsInt64(int64_t Value) const;
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explicit PPCMCExpr(VariantKind Kind, const MCExpr *Expr)
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: Kind(Kind), Expr(Expr) {}
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public:
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/// @name Construction
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/// @{
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static const PPCMCExpr *create(VariantKind Kind, const MCExpr *Expr,
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MCContext &Ctx);
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static const PPCMCExpr *createLo(const MCExpr *Expr, MCContext &Ctx) {
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return create(VK_PPC_LO, Expr, Ctx);
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}
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static const PPCMCExpr *createHi(const MCExpr *Expr, MCContext &Ctx) {
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return create(VK_PPC_HI, Expr, Ctx);
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}
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static const PPCMCExpr *createHa(const MCExpr *Expr, MCContext &Ctx) {
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return create(VK_PPC_HA, Expr, Ctx);
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}
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/// @}
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/// @name Accessors
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/// @{
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/// getOpcode - Get the kind of this expression.
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VariantKind getKind() const { return Kind; }
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/// getSubExpr - Get the child of this expression.
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const MCExpr *getSubExpr() const { return Expr; }
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/// @}
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void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
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bool evaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm,
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const MCFixup *Fixup) const override;
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void visitUsedExpr(MCStreamer &Streamer) const override;
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MCFragment *findAssociatedFragment() const override {
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return getSubExpr()->findAssociatedFragment();
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}
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// There are no TLS PPCMCExprs at the moment.
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void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override {}
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bool evaluateAsConstant(int64_t &Res) const;
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static bool classof(const MCExpr *E) {
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return E->getKind() == MCExpr::Target;
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}
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};
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} // end namespace llvm
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#endif
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