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Fix compiling empty bytecode

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This commit is contained in:
Paweł Bylica 2014-10-20 18:57:06 +02:00
parent c97ca249a0
commit 51fc9adfab
1 changed files with 5 additions and 3 deletions
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8
libevmjit/Compiler.cpp
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@ -33,16 +33,18 @@ Compiler::Compiler():
void Compiler::createBasicBlocks(bytesConstRef bytecode) void Compiler::createBasicBlocks(bytesConstRef bytecode)
{ {
std::set<ProgramCounter> splitPoints; // Sorted collections of instruction indices where basic blocks start/end std::set<ProgramCounter> splitPoints; // Sorted collections of instruction indices where basic blocks start/end
splitPoints.insert(0); // First basic block
std::map<ProgramCounter, ProgramCounter> directJumpTargets; std::map<ProgramCounter, ProgramCounter> directJumpTargets;
std::vector<ProgramCounter> indirectJumpTargets; std::vector<ProgramCounter> indirectJumpTargets;
boost::dynamic_bitset<> validJumpTargets(bytecode.size()); boost::dynamic_bitset<> validJumpTargets(std::max(bytecode.size(), size_t(1)));
splitPoints.insert(0); // First basic block
validJumpTargets[0] = true;
for (auto curr = bytecode.begin(); curr != bytecode.end(); ++curr) for (auto curr = bytecode.begin(); curr != bytecode.end(); ++curr)
{ {
ProgramCounter currentPC = curr - bytecode.begin(); ProgramCounter currentPC = curr - bytecode.begin();
validJumpTargets[currentPC] = 1; validJumpTargets[currentPC] = true;
auto inst = static_cast<Instruction>(*curr); auto inst = static_cast<Instruction>(*curr);
switch (inst) switch (inst)