cerc-io/solidity
16
0
Fork 0
mirror of https://github.com/ethereum/solidity synced 2023-10-03 13:03:40 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Integrate AddPop.

Browse Source
This commit is contained in:
chriseth 2016-11-24 21:08:30 +01:00
parent 8a78b19516
commit f521624952
2 changed files with 13 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libevmasm/Assembly.cpp
View File

@ -337,7 +337,7 @@ map<u256, u256> Assembly::optimiseInternal(bool _enable, bool _isCreation, size_
count = 0;
PeepholeOptimiser peepOpt(m_items);
if (peepOpt.optimise())
while (peepOpt.optimise())
count++;
if (!_enable)

27
libevmasm/PeepholeOptimiser.cpp
View File

@ -95,7 +95,7 @@ struct Identity: SimplePeepholeOptimizerMethod<Identity, 1>
struct PushPop: SimplePeepholeOptimizerMethod<PushPop, 2>
{
static size_t applySimple(AssemblyItem const& _push, AssemblyItem const& _pop, std::back_insert_iterator<AssemblyItems>)
static bool applySimple(AssemblyItem const& _push, AssemblyItem const& _pop, std::back_insert_iterator<AssemblyItems>)
{
auto t = _push.type();
return _pop == Instruction::POP && (
@ -106,23 +106,20 @@ struct PushPop: SimplePeepholeOptimizerMethod<PushPop, 2>
}
};
struct AddPop: SimplePeepholeOptimizerMethod<AddPop, 2>
struct OpPop: SimplePeepholeOptimizerMethod<OpPop, 2>
{
static bool apply(AssemblyItems::const_iterator _in, std::back_insert_iterator<AssemblyItems> _out)
static bool applySimple(
AssemblyItem const& _op,
AssemblyItem const& _pop,
std::back_insert_iterator<AssemblyItems> _out
)
{
if (_in[1] == Instruction::POP &&
_in[0].type() == Operation
)
if (_pop == Instruction::POP && _op.type() == Operation)
{
Instruction i0 = _in[0].instruction();
if (instructionInfo(i0).ret == 1 &&
!SemanticInformation::invalidatesMemory(i0) &&
!SemanticInformation::invalidatesStorage(i0) &&
!SemanticInformation::altersControlFlow(i0) &&
!instructionInfo(i0).sideEffects
)
Instruction instr = _op.instruction();
if (instructionInfo(instr).ret == 1 && !instructionInfo(instr).sideEffects)
{
for (int j = 0; j < instructionInfo(i0).args; j++)
for (int j = 0; j < instructionInfo(instr).args; j++)
*_out = Instruction::POP;
return true;
}
@ -236,7 +233,7 @@ bool PeepholeOptimiser::optimise()
{
OptimiserState state {m_items, 0, std::back_inserter(m_optimisedItems)};
while (state.i < m_items.size())
applyMethods(state, PushPop(), AddPop(), DoubleSwap(), JumpToNext(), UnreachableCode(), TagConjunctions(), Identity());
applyMethods(state, PushPop(), OpPop(), DoubleSwap(), JumpToNext(), UnreachableCode(), TagConjunctions(), Identity());
if (m_optimisedItems.size() < m_items.size())
{
m_items = std::move(m_optimisedItems);