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instruction_seq.cpp
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instruction_seq.cpp
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#include <cassert>
#include <algorithm>
#include "instruction.h"
#include "exceptions.h"
#include "instruction_seq.h"
InstructionSequence::InstructionSequence()
: m_funcdef_ast(nullptr) {
}
InstructionSequence::~InstructionSequence() {
// delete the Instructions
for (auto i = m_instructions.begin(); i != m_instructions.end(); ++i)
delete i->ins;
}
InstructionSequence *InstructionSequence::duplicate() const {
InstructionSequence *dup = new InstructionSequence();
dup->m_next_label = m_next_label;
dup->m_funcdef_ast = m_funcdef_ast;
for (auto i = m_instructions.begin(); i != m_instructions.end(); ++i) {
const Slot &slot = *i;
if (!slot.label.empty())
dup->define_label(slot.label);
dup->append(slot.ins->duplicate());
}
return dup;
}
void InstructionSequence::append(Instruction *ins) {
m_instructions.push_back({ label: m_next_label, ins: ins });
m_next_label = "";
}
void InstructionSequence::prepend(Instruction *ins) {
m_instructions.push_back({ label: m_next_label, ins: ins });
std::rotate(m_instructions.rbegin(), m_instructions.rbegin() + 1, m_instructions.rend());
m_next_label = "";
}
unsigned InstructionSequence::get_length() const {
return unsigned(m_instructions.size());
}
Instruction *InstructionSequence::get_instruction(unsigned index) const {
return m_instructions.at(index).ins;
}
Instruction *InstructionSequence::get_last_instruction() const {
assert(!m_instructions.empty());
return m_instructions.back().ins;
}
void InstructionSequence::define_label(const std::string &label) {
assert(m_next_label.empty());
m_next_label = label;
}
bool InstructionSequence::has_label_at_end() const {
return !m_next_label.empty();
}
Instruction *InstructionSequence::find_labeled_instruction(const std::string &label) const {
for (auto i = m_instructions.cbegin(); i != m_instructions.cend(); i++) {
if (i->label == label) {
return i->ins;
}
}
return nullptr;
}
unsigned InstructionSequence::get_index_of_labeled_instruction(const std::string &label) const {
unsigned index = 0;
for (auto i = m_instructions.cbegin(); i != m_instructions.cend(); i++) {
if (i->label == label) {
return index;
}
++index;
}
RuntimeError::raise("no instruction has label '%s'", label.c_str());
}