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Correct the order of basic blocks

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This commit is contained in:
Paweł Bylica 2014-10-07 15:44:46 +02:00
parent e52d421955
commit 577438e243
1 changed files with 10 additions and 9 deletions
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19
evmcc/Compiler.cpp
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@ -53,8 +53,7 @@ BasicBlock& Compiler::getOrCreateBasicBlockAtPC(ProgramCounter pc)
void Compiler::createBasicBlocks(const dev::bytes& bytecode)
{
getOrCreateBasicBlockAtPC(0);
getOrCreateBasicBlockAtPC(bytecode.size());
getOrCreateBasicBlockAtPC(0); // First basic block
for (auto curr = bytecode.cbegin(); curr != bytecode.cend(); ++curr)
{
@ -113,13 +112,6 @@ void Compiler::createBasicBlocks(const dev::bytes& bytecode)
val |= *iter;
}
// Create a block for the JUMP target.
ProgramCounter targetPC = val.convert_to<ProgramCounter>();
auto& targetBlock = getOrCreateBasicBlockAtPC(targetPC);
ProgramCounter jumpPC = (next - bytecode.cbegin());
jumpTargets[jumpPC] = targetBlock;
// Create a block following the JUMP.
if (next + 1 < bytecode.cend())
{
@ -127,6 +119,13 @@ void Compiler::createBasicBlocks(const dev::bytes& bytecode)
getOrCreateBasicBlockAtPC(nextPC);
}
// Create a block for the JUMP target.
ProgramCounter targetPC = val.convert_to<ProgramCounter>();
auto& targetBlock = getOrCreateBasicBlockAtPC(targetPC);
ProgramCounter jumpPC = (next - bytecode.cbegin());
jumpTargets[jumpPC] = targetBlock;
curr += 1; // skip over JUMP
}
@ -158,6 +157,8 @@ void Compiler::createBasicBlocks(const dev::bytes& bytecode)
break;
}
}
getOrCreateBasicBlockAtPC(bytecode.size()); // Final basic block
}
std::unique_ptr<llvm::Module> Compiler::compile(const dev::bytes& bytecode)