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-rw-r--r--include/llvm/ExecutionEngine/ObjectMemoryBuffer.h63
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diff --git a/include/llvm/ExecutionEngine/ObjectMemoryBuffer.h b/include/llvm/ExecutionEngine/ObjectMemoryBuffer.h
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+//===- ObjectMemoryBuffer.h - SmallVector-backed MemoryBuffrer -*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares a wrapper class to hold the memory into which an
+// object will be generated.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_EXECUTIONENGINE_OBJECTMEMORYBUFFER_H
+#define LLVM_EXECUTIONENGINE_OBJECTMEMORYBUFFER_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/raw_ostream.h"
+
+namespace llvm {
+
+/// \brief SmallVector-backed MemoryBuffer instance.
+///
+/// This class enables efficient construction of MemoryBuffers from SmallVector
+/// instances. This is useful for MCJIT and Orc, where object files are streamed
+/// into SmallVectors, then inspected using ObjectFile (which takes a
+/// MemoryBuffer).
+class ObjectMemoryBuffer : public MemoryBuffer {
+public:
+
+ /// \brief Construct an ObjectMemoryBuffer from the given SmallVector r-value.
+ ///
+ /// FIXME: It'd be nice for this to be a non-templated constructor taking a
+ /// SmallVectorImpl here instead of a templated one taking a SmallVector<N>,
+ /// but SmallVector's move-construction/assignment currently only take
+ /// SmallVectors. If/when that is fixed we can simplify this constructor and
+ /// the following one.
+ ObjectMemoryBuffer(SmallVectorImpl<char> &&SV)
+ : SV(std::move(SV)), BufferName("<in-memory object>") {
+ init(this->SV.begin(), this->SV.end(), false);
+ }
+
+ /// \brief Construct a named ObjectMemoryBuffer from the given SmallVector
+ /// r-value and StringRef.
+ ObjectMemoryBuffer(SmallVectorImpl<char> &&SV, StringRef Name)
+ : SV(std::move(SV)), BufferName(Name) {
+ init(this->SV.begin(), this->SV.end(), false);
+ }
+
+ const char* getBufferIdentifier() const override { return BufferName.c_str(); }
+
+ BufferKind getBufferKind() const override { return MemoryBuffer_Malloc; }
+
+private:
+ SmallVector<char, 0> SV;
+ std::string BufferName;
+};
+
+} // namespace llvm
+
+#endif