forked from OSchip/llvm-project
127 lines
4.3 KiB
C++
127 lines
4.3 KiB
C++
//===- ARMConstantPoolValue.h - ARM constantpool value ----------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the ARM specific constantpool value class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TARGET_ARM_CONSTANTPOOLVALUE_H
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#define LLVM_TARGET_ARM_CONSTANTPOOLVALUE_H
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#include "llvm/CodeGen/MachineConstantPool.h"
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#include "llvm/Support/ErrorHandling.h"
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#include <cstddef>
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namespace llvm {
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class Constant;
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class BlockAddress;
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class GlobalValue;
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class LLVMContext;
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namespace ARMCP {
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enum ARMCPKind {
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CPValue,
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CPExtSymbol,
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CPBlockAddress,
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CPLSDA
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};
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enum ARMCPModifier {
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no_modifier,
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TLSGD,
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GOT,
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GOTOFF,
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GOTTPOFF,
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TPOFF
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};
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}
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/// ARMConstantPoolValue - ARM specific constantpool value. This is used to
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/// represent PC-relative displacement between the address of the load
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/// instruction and the constant being loaded, i.e. (&GV-(LPIC+8)).
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class ARMConstantPoolValue : public MachineConstantPoolValue {
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const Constant *CVal; // Constant being loaded.
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const char *S; // ExtSymbol being loaded.
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unsigned LabelId; // Label id of the load.
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ARMCP::ARMCPKind Kind; // Kind of constant.
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unsigned char PCAdjust; // Extra adjustment if constantpool is pc-relative.
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// 8 for ARM, 4 for Thumb.
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ARMCP::ARMCPModifier Modifier; // GV modifier i.e. (&GV(modifier)-(LPIC+8))
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bool AddCurrentAddress;
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public:
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ARMConstantPoolValue(const Constant *cval, unsigned id,
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ARMCP::ARMCPKind Kind = ARMCP::CPValue,
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unsigned char PCAdj = 0,
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ARMCP::ARMCPModifier Modifier = ARMCP::no_modifier,
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bool AddCurrentAddress = false);
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ARMConstantPoolValue(LLVMContext &C, const char *s, unsigned id,
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unsigned char PCAdj = 0,
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ARMCP::ARMCPModifier Modifier = ARMCP::no_modifier,
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bool AddCurrentAddress = false);
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ARMConstantPoolValue(const GlobalValue *GV, ARMCP::ARMCPModifier Modifier);
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ARMConstantPoolValue();
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~ARMConstantPoolValue();
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const GlobalValue *getGV() const;
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const char *getSymbol() const { return S; }
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const BlockAddress *getBlockAddress() const;
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ARMCP::ARMCPModifier getModifier() const { return Modifier; }
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const char *getModifierText() const {
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switch (Modifier) {
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default: llvm_unreachable("Unknown modifier!");
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// FIXME: Are these case sensitive? It'd be nice to lower-case all the
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// strings if that's legal.
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case ARMCP::no_modifier: return "none";
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case ARMCP::TLSGD: return "tlsgd";
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case ARMCP::GOT: return "GOT";
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case ARMCP::GOTOFF: return "GOTOFF";
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case ARMCP::GOTTPOFF: return "gottpoff";
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case ARMCP::TPOFF: return "tpoff";
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}
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}
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bool hasModifier() const { return Modifier != ARMCP::no_modifier; }
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bool mustAddCurrentAddress() const { return AddCurrentAddress; }
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unsigned getLabelId() const { return LabelId; }
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unsigned char getPCAdjustment() const { return PCAdjust; }
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bool isGlobalValue() const { return Kind == ARMCP::CPValue; }
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bool isExtSymbol() const { return Kind == ARMCP::CPExtSymbol; }
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bool isBlockAddress() { return Kind == ARMCP::CPBlockAddress; }
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bool isLSDA() { return Kind == ARMCP::CPLSDA; }
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virtual unsigned getRelocationInfo() const {
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// FIXME: This is conservatively claiming that these entries require a
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// relocation, we may be able to do better than this.
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return 2;
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}
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virtual int getExistingMachineCPValue(MachineConstantPool *CP,
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unsigned Alignment);
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virtual void AddSelectionDAGCSEId(FoldingSetNodeID &ID);
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/// hasSameValue - Return true if this ARM constpool value
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/// can share the same constantpool entry as another ARM constpool value.
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bool hasSameValue(ARMConstantPoolValue *ACPV);
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void print(raw_ostream *O) const { if (O) print(*O); }
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void print(raw_ostream &O) const;
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void dump() const;
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};
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inline raw_ostream &operator<<(raw_ostream &O, const ARMConstantPoolValue &V) {
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V.print(O);
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return O;
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}
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} // End llvm namespace
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#endif
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