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https://github.com/c64scene-ar/llvm-6502.git
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1f659329b6
This allows us to just use a std::unique_ptr to store the pointer to the buffer. The flip side is that they have to support releasing the buffer back to the caller. Overall this looks like a more efficient and less brittle api. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211542 91177308-0d34-0410-b5e6-96231b3b80d8
64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
//===- GVMaterializer.h - Interface for GV materializers --------*- 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 provides an abstract interface for loading a module from some
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// place. This interface allows incremental or random access loading of
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// functions from the file. This is useful for applications like JIT compilers
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// or interprocedural optimizers that do not need the entire program in memory
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// at the same time.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_IR_GVMATERIALIZER_H
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#define LLVM_IR_GVMATERIALIZER_H
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#include <system_error>
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namespace llvm {
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class Function;
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class GlobalValue;
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class Module;
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class GVMaterializer {
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protected:
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GVMaterializer() {}
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public:
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virtual ~GVMaterializer();
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/// True if GV can be materialized from whatever backing store this
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/// GVMaterializer uses and has not been materialized yet.
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virtual bool isMaterializable(const GlobalValue *GV) const = 0;
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/// True if GV has been materialized and can be dematerialized back to
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/// whatever backing store this GVMaterializer uses.
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virtual bool isDematerializable(const GlobalValue *GV) const = 0;
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/// Make sure the given GlobalValue is fully read.
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///
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virtual std::error_code Materialize(GlobalValue *GV) = 0;
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/// If the given GlobalValue is read in, and if the GVMaterializer supports
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/// it, release the memory for the GV, and set it up to be materialized
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/// lazily. If the Materializer doesn't support this capability, this method
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/// is a noop.
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///
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virtual void Dematerialize(GlobalValue *) {}
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/// Make sure the entire Module has been completely read.
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///
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virtual std::error_code MaterializeModule(Module *M) = 0;
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virtual void releaseBuffer() = 0;
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};
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} // End llvm namespace
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#endif
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