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52 lines
1.1 KiB
52 lines
1.1 KiB
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#include "BasicBlock.h"
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#include <llvm/IR/Function.h>
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#include <llvm/IR/Instructions.h>
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namespace evmcc
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{
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const char* BasicBlock::NamePrefix = "Instr.";
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BasicBlock::BasicBlock(ProgramCounter _beginInstIdx, ProgramCounter _endInstIdx, llvm::Function* _mainFunc) :
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m_beginInstIdx(_beginInstIdx),
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m_endInstIdx(_endInstIdx),
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m_llvmBB(llvm::BasicBlock::Create(_mainFunc->getContext(), {NamePrefix, std::to_string(_beginInstIdx)}, _mainFunc)),
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m_stack(m_llvmBB)
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{}
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void BasicBlock::Stack::push(llvm::Value* _value)
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{
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m_backend.push_back(_value);
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}
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llvm::Value* BasicBlock::Stack::pop()
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{
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if (m_backend.empty())
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{
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// Create PHI node
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auto i256Ty = llvm::Type::getIntNTy(m_llvmBB->getContext(), 256);
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if (m_llvmBB->empty())
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return llvm::PHINode::Create(i256Ty, 0, {}, m_llvmBB);
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return llvm::PHINode::Create(i256Ty, 0, {}, m_llvmBB->getFirstNonPHI());
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}
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auto top = m_backend.back();
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m_backend.pop_back();
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return top;
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}
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void BasicBlock::Stack::dup(size_t _index)
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{
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m_backend.push_back(get(_index));
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}
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void BasicBlock::Stack::swap(size_t _index)
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{
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assert(_index != 0);
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std::swap(get(0), get(_index));
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}
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}
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