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68 lines
1.3 KiB
68 lines
1.3 KiB
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#pragma once
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#include <vector>
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#include <llvm/IR/IRBuilder.h>
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namespace evmcc
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{
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class BasicBlock;
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class Stack
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{
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public:
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Stack(llvm::IRBuilder<>& _builder, llvm::Module* _module);
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void push(llvm::Value* _value);
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llvm::Value* pop();
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llvm::Value* top();
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llvm::Value* get(uint32_t _index);
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void set(uint32_t _index, llvm::Value* _value);
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private:
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llvm::IRBuilder<>& m_builder;
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llvm::Value* m_stackVal;
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llvm::Function* m_stackPush;
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llvm::Function* m_stackPop;
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llvm::Function* m_stackGet;
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llvm::Function* m_stackSet;
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};
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/**
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Stack adapter for Basic Block
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Transforms stack to SSA: tracks values and their positions on the imaginary stack used inside a basic block.
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*/
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class BBStack
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{
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public:
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BBStack() = default;
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BBStack(const BBStack&) = delete;
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void operator=(const BBStack&) = delete;
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/**
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Changes current basic block (if any) with a new one with empty state.
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*/
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void setBasicBlock(BasicBlock& _newBlock);
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void push(llvm::Value* _value);
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llvm::Value* pop();
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/**
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Duplicates _index'th value on stack.
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*/
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void dup(size_t _index);
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/**
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Swaps _index'th value on stack with a value on stack top.
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@param _index Index of value to be swaped. Cannot be 0.
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*/
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void swap(size_t _index);
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private:
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BasicBlock* m_block = nullptr; ///< Current basic block
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};
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}
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