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Allow creating LLVM constants directly from u256

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This commit is contained in:
Paweł Bylica 2014-10-29 21:23:16 +01:00
parent 33f1253bbe
commit e6b4761765
3 changed files with 12 additions and 5 deletions
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5
libevmjit/GasMeter.cpp
View file

@ -126,9 +126,6 @@ void GasMeter::countSStore(Ext& _ext, llvm::Value* _index, llvm::Value* _newValu
{
assert(!m_checkCall); // Everything should've been commited before
static const auto updateCost = static_cast<uint64_t>(c_sstoreResetGas); // TODO: Discuss naming (DB names look better)
static const auto insertCost = static_cast<uint64_t>(c_sstoreSetGas);
auto oldValue = _ext.store(_index);
auto oldValueIsZero = m_builder.CreateICmpEQ(oldValue, Constant::get(0), "oldValueIsZero");
auto newValueIsZero = m_builder.CreateICmpEQ(_newValue, Constant::get(0), "newValueIsZero");
@ -136,7 +133,7 @@ void GasMeter::countSStore(Ext& _ext, llvm::Value* _index, llvm::Value* _newValu
auto newValueIsntZero = m_builder.CreateICmpNE(_newValue, Constant::get(0), "newValueIsntZero");
auto isInsert = m_builder.CreateAnd(oldValueIsZero, newValueIsntZero, "isInsert");
auto isDelete = m_builder.CreateAnd(oldValueIsntZero, newValueIsZero, "isDelete");
auto cost = m_builder.CreateSelect(isInsert, Constant::get(insertCost), Constant::get(updateCost), "cost");
auto cost = m_builder.CreateSelect(isInsert, Constant::get(c_sstoreSetGas), Constant::get(c_sstoreResetGas), "cost");
cost = m_builder.CreateSelect(isDelete, Constant::get(0), cost, "cost");
createCall(m_gasCheckFunc, cost);
}

8
libevmjit/Type.cpp
View file

@ -41,6 +41,14 @@ llvm::ConstantInt* Constant::get(uint64_t _n)
return llvm::ConstantInt::get(Type::i256, _n);
}
llvm::ConstantInt* Constant::get(u256 _n)
{
auto limbs = _n.backend().limbs();
auto words = reinterpret_cast<uint64_t*>(limbs);
llvm::APInt n(256, 4, words);
return static_cast<llvm::ConstantInt*>(llvm::ConstantInt::get(Type::i256, n));
}
llvm::ConstantInt* Constant::get(ReturnCode _returnCode)
{
return llvm::ConstantInt::get(Type::MainReturn, static_cast<uint64_t>(_returnCode));

4
libevmjit/Type.h
View file

@ -3,6 +3,7 @@
#include <llvm/IR/Type.h>
#include <llvm/IR/Constants.h>
#include <libdevcore/Common.h>
namespace dev
{
@ -50,7 +51,8 @@ enum class ReturnCode
struct Constant
{
/// Returns word-size constant
static llvm::ConstantInt* get(uint64_t _n); // TODO: add overload with u256
static llvm::ConstantInt* get(uint64_t _n);
static llvm::ConstantInt* get(u256 _n);
static llvm::ConstantInt* get(ReturnCode _returnCode);
};