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46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
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//===-- CodeGen/MachineConstantPool.h - Abstract Constant Pool --*- C++ -*-===//
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//
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// The MachineConstantPool class keeps track of constants referenced by a
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// function which must be spilled to memory. This is used for constants which
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// are unable to be used directly as operands to instructions, which typically
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// include floating point and large integer constants.
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//
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// Instructions reference the address of these constant pool constants through
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// the use of MO_ConstantPoolIndex values. When emitting assembly or machine
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// code, these virtual address references are converted to refer to the
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// address of the function constant pool values.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_MACHINECONSTANTPOOL_H
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#define LLVM_CODEGEN_MACHINECONSTANTPOOL_H
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#include <vector>
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class Constant;
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class MachineConstantPool {
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std::vector<Constant*> Constants;
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public:
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/// getConstantPoolIndex - Create a new entry in the constant pool or return
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/// an existing one. This should eventually allow sharing of duplicate
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/// objects in the constant pool, but this is adequate for now.
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///
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unsigned getConstantPoolIndex(Constant *C) {
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Constants.push_back(C);
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return Constants.size()-1;
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}
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const std::vector<Constant*> &getConstants() const { return Constants; }
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/// print - Used by the MachineFunction printer to print information about
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/// stack objects. Implemented in MachineFunction.cpp
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///
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void print(std::ostream &OS) const;
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/// dump - Call print(std::cerr) to be called from the debugger.
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void dump() const;
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};
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#endif
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