Initial revision
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Bytecode/Writer/WriterInternals.h b/lib/Bytecode/Writer/WriterInternals.h
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+++ b/lib/Bytecode/Writer/WriterInternals.h
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+//===-- WriterInternals.h - Data structures shared by the Writer -*- C++ -*--=//
+//
+// This header defines the interface used between components of the bytecode
+// writer.
+//
+// Note that the performance of this library is not terribly important, because
+// it shouldn't be used by JIT type applications... so it is not a huge focus
+// at least. :)
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_BYTECODE_WRITER_WRITERINTERNALS_H
+#define LLVM_LIB_BYTECODE_WRITER_WRITERINTERNALS_H
+
+#include "llvm/Bytecode/Writer.h"
+#include "llvm/Bytecode/Format.h"
+#include "llvm/Bytecode/Primitives.h"
+#include "llvm/Analysis/SlotCalculator.h"
+#include "llvm/Tools/DataTypes.h"
+#include "llvm/Instruction.h"
+
+class BytecodeWriter : public ModuleAnalyzer {
+ vector<unsigned char> &Out;
+ SlotCalculator Table;
+public:
+ BytecodeWriter(vector<unsigned char> &o, const Module *M);
+
+protected:
+ virtual bool processConstPool(const ConstantPool &CP, bool isMethod);
+ virtual bool processMethod(const Method *M);
+ virtual bool processBasicBlock(const BasicBlock *BB);
+ virtual bool processInstruction(const Instruction *I);
+
+private :
+ inline void outputSignature() {
+ static const unsigned char *Sig = (const unsigned char*)"llvm";
+ Out.insert(Out.end(), Sig, Sig+4); // output the bytecode signature...
+ }
+
+ void outputModuleInfoBlock(const Module *C);
+ void outputSymbolTable(const SymbolTable &ST);
+ bool outputConstant(const ConstPoolVal *CPV);
+ void outputType(const Type *T);
+};
+
+
+
+
+// BytecodeBlock - Little helper class that helps us do backpatching of bytecode
+// block sizes really easily. It backpatches when it goes out of scope.
+//
+class BytecodeBlock {
+ unsigned Loc;
+ vector<unsigned char> &Out;
+
+ BytecodeBlock(const BytecodeBlock &); // do not implement
+ void operator=(const BytecodeBlock &); // do not implement
+public:
+ inline BytecodeBlock(unsigned ID, vector<unsigned char> &o) : Out(o) {
+ output(ID, Out);
+ output((unsigned)0, Out); // Reserve the space for the block size...
+ Loc = Out.size();
+ }
+
+ inline ~BytecodeBlock() { // Do backpatch when block goes out
+ // of scope...
+ // cerr << "OldLoc = " << Loc << " NewLoc = " << NewLoc << " diff = " << (NewLoc-Loc) << endl;
+ output((unsigned)(Out.size()-Loc), Out, (int)Loc-4);
+ align32(Out); // Blocks must ALWAYS be aligned
+ }
+};
+
+
+#endif