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external/llvm/lib/Target/ARM/ARMConstantPoolValue.h
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external/llvm/lib/Target/ARM/ARMConstantPoolValue.h
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//===- 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_LIB_TARGET_ARM_ARMCONSTANTPOOLVALUE_H
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#define LLVM_LIB_TARGET_ARM_ARMCONSTANTPOOLVALUE_H
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/iterator_range.h"
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#include "llvm/CodeGen/MachineConstantPool.h"
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#include "llvm/Support/Casting.h"
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#include <string>
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#include <vector>
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namespace llvm {
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class BlockAddress;
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class Constant;
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class GlobalValue;
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class GlobalVariable;
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class LLVMContext;
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class MachineBasicBlock;
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class raw_ostream;
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class Type;
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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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CPMachineBasicBlock,
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CPPromotedGlobal
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};
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enum ARMCPModifier {
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no_modifier, /// None
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TLSGD, /// Thread Local Storage (General Dynamic Mode)
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GOT_PREL, /// Global Offset Table, PC Relative
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GOTTPOFF, /// Global Offset Table, Thread Pointer Offset
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TPOFF, /// Thread Pointer Offset
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SECREL, /// Section Relative (Windows TLS)
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SBREL, /// Static Base Relative (RWPI)
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};
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} // end namespace ARMCP
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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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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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protected:
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ARMConstantPoolValue(Type *Ty, unsigned id, ARMCP::ARMCPKind Kind,
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unsigned char PCAdj, ARMCP::ARMCPModifier Modifier,
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bool AddCurrentAddress);
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ARMConstantPoolValue(LLVMContext &C, unsigned id, ARMCP::ARMCPKind Kind,
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unsigned char PCAdj, ARMCP::ARMCPModifier Modifier,
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bool AddCurrentAddress);
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template <typename Derived>
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int getExistingMachineCPValueImpl(MachineConstantPool *CP,
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unsigned Alignment) {
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unsigned AlignMask = Alignment - 1;
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const std::vector<MachineConstantPoolEntry> &Constants = CP->getConstants();
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for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
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if (Constants[i].isMachineConstantPoolEntry() &&
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(Constants[i].getAlignment() & AlignMask) == 0) {
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auto *CPV =
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static_cast<ARMConstantPoolValue*>(Constants[i].Val.MachineCPVal);
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if (Derived *APC = dyn_cast<Derived>(CPV))
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if (cast<Derived>(this)->equals(APC))
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return i;
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}
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}
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return -1;
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}
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public:
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~ARMConstantPoolValue() override;
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ARMCP::ARMCPModifier getModifier() const { return Modifier; }
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StringRef getModifierText() const;
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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() const { return Kind == ARMCP::CPBlockAddress; }
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bool isLSDA() const { return Kind == ARMCP::CPLSDA; }
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bool isMachineBasicBlock() const{ return Kind == ARMCP::CPMachineBasicBlock; }
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bool isPromotedGlobal() const{ return Kind == ARMCP::CPPromotedGlobal; }
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int getExistingMachineCPValue(MachineConstantPool *CP,
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unsigned Alignment) override;
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void addSelectionDAGCSEId(FoldingSetNodeID &ID) override;
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/// hasSameValue - Return true if this ARM constpool value can share the same
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/// constantpool entry as another ARM constpool value.
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virtual bool hasSameValue(ARMConstantPoolValue *ACPV);
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bool equals(const ARMConstantPoolValue *A) const {
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return this->LabelId == A->LabelId &&
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this->PCAdjust == A->PCAdjust &&
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this->Modifier == A->Modifier;
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}
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void print(raw_ostream &O) const override;
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void print(raw_ostream *O) const { if (O) print(*O); }
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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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/// ARMConstantPoolConstant - ARM-specific constant pool values for Constants,
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/// Functions, and BlockAddresses.
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class ARMConstantPoolConstant : public ARMConstantPoolValue {
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const Constant *CVal; // Constant being loaded.
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SmallPtrSet<const GlobalVariable*, 1> GVars;
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ARMConstantPoolConstant(const Constant *C,
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unsigned ID,
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ARMCP::ARMCPKind Kind,
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unsigned char PCAdj,
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ARMCP::ARMCPModifier Modifier,
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bool AddCurrentAddress);
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ARMConstantPoolConstant(Type *Ty, const Constant *C,
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unsigned ID,
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ARMCP::ARMCPKind Kind,
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unsigned char PCAdj,
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ARMCP::ARMCPModifier Modifier,
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bool AddCurrentAddress);
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ARMConstantPoolConstant(const GlobalVariable *GV, const Constant *Init);
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public:
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static ARMConstantPoolConstant *Create(const Constant *C, unsigned ID);
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static ARMConstantPoolConstant *Create(const GlobalValue *GV,
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ARMCP::ARMCPModifier Modifier);
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static ARMConstantPoolConstant *Create(const GlobalVariable *GV,
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const Constant *Initializer);
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static ARMConstantPoolConstant *Create(const Constant *C, unsigned ID,
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ARMCP::ARMCPKind Kind,
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unsigned char PCAdj);
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static ARMConstantPoolConstant *Create(const Constant *C, unsigned ID,
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ARMCP::ARMCPKind Kind,
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unsigned char PCAdj,
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ARMCP::ARMCPModifier Modifier,
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bool AddCurrentAddress);
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const GlobalValue *getGV() const;
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const BlockAddress *getBlockAddress() const;
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using promoted_iterator = SmallPtrSet<const GlobalVariable *, 1>::iterator;
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iterator_range<promoted_iterator> promotedGlobals() {
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return iterator_range<promoted_iterator>(GVars.begin(), GVars.end());
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}
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const Constant *getPromotedGlobalInit() const {
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return CVal;
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}
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int getExistingMachineCPValue(MachineConstantPool *CP,
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unsigned Alignment) override;
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/// hasSameValue - Return true if this ARM constpool value can share the same
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/// constantpool entry as another ARM constpool value.
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bool hasSameValue(ARMConstantPoolValue *ACPV) override;
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void addSelectionDAGCSEId(FoldingSetNodeID &ID) override;
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void print(raw_ostream &O) const override;
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static bool classof(const ARMConstantPoolValue *APV) {
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return APV->isGlobalValue() || APV->isBlockAddress() || APV->isLSDA() ||
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APV->isPromotedGlobal();
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}
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bool equals(const ARMConstantPoolConstant *A) const {
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return CVal == A->CVal && ARMConstantPoolValue::equals(A);
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}
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};
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/// ARMConstantPoolSymbol - ARM-specific constantpool values for external
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/// symbols.
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class ARMConstantPoolSymbol : public ARMConstantPoolValue {
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const std::string S; // ExtSymbol being loaded.
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ARMConstantPoolSymbol(LLVMContext &C, StringRef s, unsigned id,
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unsigned char PCAdj, ARMCP::ARMCPModifier Modifier,
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bool AddCurrentAddress);
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public:
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static ARMConstantPoolSymbol *Create(LLVMContext &C, StringRef s, unsigned ID,
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unsigned char PCAdj);
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StringRef getSymbol() const { return S; }
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int getExistingMachineCPValue(MachineConstantPool *CP,
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unsigned Alignment) override;
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void addSelectionDAGCSEId(FoldingSetNodeID &ID) override;
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/// hasSameValue - Return true if this ARM constpool value can share the same
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/// constantpool entry as another ARM constpool value.
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bool hasSameValue(ARMConstantPoolValue *ACPV) override;
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void print(raw_ostream &O) const override;
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static bool classof(const ARMConstantPoolValue *ACPV) {
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return ACPV->isExtSymbol();
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}
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bool equals(const ARMConstantPoolSymbol *A) const {
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return S == A->S && ARMConstantPoolValue::equals(A);
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}
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};
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/// ARMConstantPoolMBB - ARM-specific constantpool value of a machine basic
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/// block.
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class ARMConstantPoolMBB : public ARMConstantPoolValue {
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const MachineBasicBlock *MBB; // Machine basic block.
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ARMConstantPoolMBB(LLVMContext &C, const MachineBasicBlock *mbb, unsigned id,
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unsigned char PCAdj, ARMCP::ARMCPModifier Modifier,
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bool AddCurrentAddress);
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public:
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static ARMConstantPoolMBB *Create(LLVMContext &C,
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const MachineBasicBlock *mbb,
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unsigned ID, unsigned char PCAdj);
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const MachineBasicBlock *getMBB() const { return MBB; }
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int getExistingMachineCPValue(MachineConstantPool *CP,
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unsigned Alignment) override;
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void addSelectionDAGCSEId(FoldingSetNodeID &ID) override;
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/// hasSameValue - Return true if this ARM constpool value can share the same
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/// constantpool entry as another ARM constpool value.
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bool hasSameValue(ARMConstantPoolValue *ACPV) override;
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void print(raw_ostream &O) const override;
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static bool classof(const ARMConstantPoolValue *ACPV) {
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return ACPV->isMachineBasicBlock();
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}
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bool equals(const ARMConstantPoolMBB *A) const {
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return MBB == A->MBB && ARMConstantPoolValue::equals(A);
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}
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};
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_ARM_ARMCONSTANTPOOLVALUE_H
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