DFGCallArrayAllocatorSlowPathGenerator.h [plain text]
#ifndef DFGCallArrayAllocatorSlowPathGenerator_h
#define DFGCallArrayAllocatorSlowPathGenerator_h
#if ENABLE(DFG_JIT)
#include "DFGCommon.h"
#include "DFGSlowPathGenerator.h"
#include "DFGSpeculativeJIT.h"
#include <wtf/Vector.h>
namespace JSC { namespace DFG {
class CallArrayAllocatorSlowPathGenerator : public JumpingSlowPathGenerator<MacroAssembler::JumpList> {
public:
CallArrayAllocatorSlowPathGenerator(
MacroAssembler::JumpList from, SpeculativeJIT* jit, P_JITOperation_EStZ function,
GPRReg resultGPR, GPRReg storageGPR, Structure* structure, size_t size)
: JumpingSlowPathGenerator<MacroAssembler::JumpList>(from, jit)
, m_function(function)
, m_resultGPR(resultGPR)
, m_storageGPR(storageGPR)
, m_structure(structure)
, m_size(size)
{
ASSERT(size < static_cast<size_t>(std::numeric_limits<int32_t>::max()));
jit->silentSpillAllRegistersImpl(false, m_plans, resultGPR);
}
protected:
virtual void generateInternal(SpeculativeJIT* jit) override
{
linkFrom(jit);
for (unsigned i = 0; i < m_plans.size(); ++i)
jit->silentSpill(m_plans[i]);
jit->callOperation(m_function, m_resultGPR, m_structure, m_size);
GPRReg canTrample = SpeculativeJIT::pickCanTrample(m_resultGPR);
for (unsigned i = m_plans.size(); i--;)
jit->silentFill(m_plans[i], canTrample);
jit->m_jit.loadPtr(MacroAssembler::Address(m_resultGPR, JSObject::butterflyOffset()), m_storageGPR);
jumpTo(jit);
}
private:
P_JITOperation_EStZ m_function;
GPRReg m_resultGPR;
GPRReg m_storageGPR;
Structure* m_structure;
size_t m_size;
Vector<SilentRegisterSavePlan, 2> m_plans;
};
class CallArrayAllocatorWithVariableSizeSlowPathGenerator : public JumpingSlowPathGenerator<MacroAssembler::JumpList> {
public:
CallArrayAllocatorWithVariableSizeSlowPathGenerator(
MacroAssembler::JumpList from, SpeculativeJIT* jit, P_JITOperation_EStZ function,
GPRReg resultGPR, Structure* contiguousStructure, Structure* arrayStorageStructure, GPRReg sizeGPR)
: JumpingSlowPathGenerator<MacroAssembler::JumpList>(from, jit)
, m_function(function)
, m_resultGPR(resultGPR)
, m_contiguousStructure(contiguousStructure)
, m_arrayStorageStructure(arrayStorageStructure)
, m_sizeGPR(sizeGPR)
{
jit->silentSpillAllRegistersImpl(false, m_plans, resultGPR);
}
protected:
virtual void generateInternal(SpeculativeJIT* jit) override
{
linkFrom(jit);
for (unsigned i = 0; i < m_plans.size(); ++i)
jit->silentSpill(m_plans[i]);
GPRReg scratchGPR = AssemblyHelpers::selectScratchGPR(m_sizeGPR);
MacroAssembler::Jump bigLength = jit->m_jit.branch32(MacroAssembler::AboveOrEqual, m_sizeGPR, MacroAssembler::TrustedImm32(MIN_SPARSE_ARRAY_INDEX));
jit->m_jit.move(MacroAssembler::TrustedImmPtr(m_contiguousStructure), scratchGPR);
MacroAssembler::Jump done = jit->m_jit.jump();
bigLength.link(&jit->m_jit);
jit->m_jit.move(MacroAssembler::TrustedImmPtr(m_arrayStorageStructure), scratchGPR);
done.link(&jit->m_jit);
jit->callOperation(m_function, m_resultGPR, scratchGPR, m_sizeGPR);
GPRReg canTrample = SpeculativeJIT::pickCanTrample(m_resultGPR);
for (unsigned i = m_plans.size(); i--;)
jit->silentFill(m_plans[i], canTrample);
jumpTo(jit);
}
private:
P_JITOperation_EStZ m_function;
GPRReg m_resultGPR;
Structure* m_contiguousStructure;
Structure* m_arrayStorageStructure;
GPRReg m_sizeGPR;
Vector<SilentRegisterSavePlan, 2> m_plans;
};
} }
#endif // ENABLE(DFG_JIT)
#endif // DFGCallArrayAllocatorSlowPathGenerator_h