Introducing CompilerHelper - a base class for... compiler helper classes like Memory, GasMeter, etc.

evmcc/Compiler.cpp

@@ -714,7 +714,7 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, const bytes& bytecode,
 			auto srcIdx = stack.pop();
 			auto reqBytes = stack.pop();
 
-			auto srcPtr = ext.code();
+			auto srcPtr = ext.code();	// TODO: Code & its size are constants, feature #80814234
 			auto srcSize = ext.codesize();
 
 			memory.copyBytes(srcPtr, srcSize, srcIdx, destMemIdx, reqBytes);

evmcc/CompilerHelper.cpp

@@ -0,0 +1,13 @@
+
+#include "CompilerHelper.h"
+
+namespace dev
+{
+namespace eth
+{
+namespace jit
+{
+
+}
+}
+}

evmcc/CompilerHelper.h

@@ -0,0 +1,34 @@
+
+#pragma once
+
+#include <llvm/IR/IRBuilder.h>
+
+
+namespace dev
+{
+namespace eth
+{
+namespace jit
+{
+
+class CompilerHelper
+{
+protected:
+	CompilerHelper(llvm::IRBuilder<>& _builder, llvm::Module* _module):
+		m_builder(_builder),
+		m_module(_module)
+	{}
+
+	CompilerHelper(const CompilerHelper&) = delete;
+	void operator=(CompilerHelper) = delete;
+
+	/// Reference to parent compiler IR builder
+	llvm::IRBuilder<>& m_builder;
+
+	/// Reference to the IR module being compiled
+	llvm::Module* m_module;
+};
+
+}
+}
+}

evmcc/Ext.cpp

@@ -43,8 +43,8 @@ struct ExtData
 	const byte* code;
 };
 
-Ext::Ext(llvm::IRBuilder<>& _builder, llvm::Module* module)
+Ext::Ext(llvm::IRBuilder<>& _builder, llvm::Module* module):
-	: m_builder(_builder)
+	CompilerHelper(_builder, module)
 {
 	auto&& ctx = _builder.getContext();
 

evmcc/Ext.h

@@ -1,10 +1,10 @@
 
 #pragma once
 
-#include <llvm/IR/IRBuilder.h>
-
 #include <libevm/ExtVMFace.h>
 
+#include "CompilerHelper.h"
+
 namespace dev
 {
 namespace eth
@@ -12,11 +12,10 @@ namespace eth
 namespace jit
 {
 
-class Ext
+class Ext : public CompilerHelper
 {
 public:
 	Ext(llvm::IRBuilder<>& _builder, llvm::Module* module);
-	static void init(std::unique_ptr<ExtVMFace> _ext);
 
 	llvm::Value* store(llvm::Value* _index);
 	void setStore(llvm::Value* _index, llvm::Value* _value);
@@ -54,8 +53,6 @@ private:
 	llvm::Value* bswap(llvm::Value*);
 
 private:
-	llvm::IRBuilder<>& m_builder;
-
 	llvm::Value* m_args[2];
 	llvm::Value* m_arg2;
 	llvm::Value* m_arg3;

evmcc/GasMeter.cpp

@@ -81,7 +81,7 @@ bool isCostBlockEnd(Instruction _inst)
 }
 
 GasMeter::GasMeter(llvm::IRBuilder<>& _builder, llvm::Module* _module) :
-	m_builder(_builder)
+	CompilerHelper(_builder, _module)
 {
 	m_gas = new llvm::GlobalVariable(*_module, Type::i256, false, llvm::GlobalVariable::ExternalLinkage, nullptr, "gas");
 	m_gas->setUnnamedAddr(true); // Address is not important

evmcc/GasMeter.h

@@ -1,10 +1,10 @@
 
 #pragma once
 
-#include <llvm/IR/IRBuilder.h>
-
 #include <libevmface/Instruction.h>
 
+#include "CompilerHelper.h"
+
 namespace dev
 {
 namespace eth
@@ -12,14 +12,11 @@ namespace eth
 namespace jit
 {
 
-class GasMeter
+class GasMeter : public CompilerHelper
 {
 public:
 	GasMeter(llvm::IRBuilder<>& _builder, llvm::Module* _module);
 
-	GasMeter(const GasMeter&) = delete;
-	void operator=(GasMeter) = delete;
-
 	/// Count step cost of instruction
 	void count(Instruction _inst);
 
@@ -42,7 +39,7 @@ private:
 	/// Cumulative gas cost of a block of instructions
 	/// @TODO Handle overflow
 	uint64_t m_blockCost = 0;
-	llvm::IRBuilder<>& m_builder;
+
 	llvm::CallInst* m_checkCall = nullptr;
 	llvm::GlobalVariable* m_gas;
 	llvm::Function* m_gasCheckFunc;

evmcc/Memory.cpp

@@ -23,7 +23,7 @@ namespace jit
 {
 
 Memory::Memory(llvm::IRBuilder<>& _builder, llvm::Module* _module, GasMeter& _gasMeter):
-	m_builder(_builder)
+	CompilerHelper(_builder, _module)
 {
 	auto i64Ty = m_builder.getInt64Ty();
 	llvm::Type* argTypes[] = {i64Ty, i64Ty};

evmcc/Memory.h

@@ -1,9 +1,9 @@
 #pragma once
 
-#include <llvm/IR/IRBuilder.h>
-
 #include <libdevcore/Common.h>
 
+#include "CompilerHelper.h"
+
 namespace dev
 {
 namespace eth
@@ -11,14 +11,10 @@ namespace eth
 namespace jit
 {
 
-class GasMeter;
+class Memory : public CompilerHelper
-
-class Memory
 {
 public:
-	Memory(llvm::IRBuilder<>& _builder, llvm::Module* _module, GasMeter& _gasMeter);
+	Memory(llvm::IRBuilder<>& _builder, llvm::Module* _module, class GasMeter& _gasMeter);
-	Memory(const Memory&) = delete;
-	void operator=(Memory) = delete;
 
 	llvm::Value* loadWord(llvm::Value* _addr);
 	void storeWord(llvm::Value* _addr, llvm::Value* _word);
@@ -44,8 +40,6 @@ private:
 	llvm::Function* createRequireFunc(llvm::Module* _module, GasMeter& _gasMeter);
 
 private:
-	llvm::IRBuilder<>& m_builder;
-
 	llvm::GlobalVariable* m_data;
 	llvm::GlobalVariable* m_size;