--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/3rdparty/webkit/JavaScriptCore/jit/JIT.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,611 @@
+/*
+ * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "JIT.h"
+
+// This probably does not belong here; adding here for now as a quick Windows build fix.
+#if ENABLE(ASSEMBLER) && PLATFORM(X86) && !PLATFORM(MAC)
+#include "MacroAssembler.h"
+JSC::MacroAssemblerX86Common::SSE2CheckState JSC::MacroAssemblerX86Common::s_sse2CheckState = NotCheckedSSE2;
+#endif
+
+#if ENABLE(JIT)
+
+#include "CodeBlock.h"
+#include "Interpreter.h"
+#include "JITInlineMethods.h"
+#include "JITStubs.h"
+#include "JITStubCall.h"
+#include "JSArray.h"
+#include "JSFunction.h"
+#include "LinkBuffer.h"
+#include "RepatchBuffer.h"
+#include "ResultType.h"
+#include "SamplingTool.h"
+
+#ifndef NDEBUG
+#include <stdio.h>
+#endif
+
+using namespace std;
+
+namespace JSC {
+
+void ctiPatchNearCallByReturnAddress(CodeBlock* codeblock, ReturnAddressPtr returnAddress, MacroAssemblerCodePtr newCalleeFunction)
+{
+ RepatchBuffer repatchBuffer(codeblock);
+ repatchBuffer.relinkNearCallerToTrampoline(returnAddress, newCalleeFunction);
+}
+
+void ctiPatchCallByReturnAddress(CodeBlock* codeblock, ReturnAddressPtr returnAddress, MacroAssemblerCodePtr newCalleeFunction)
+{
+ RepatchBuffer repatchBuffer(codeblock);
+ repatchBuffer.relinkCallerToTrampoline(returnAddress, newCalleeFunction);
+}
+
+void ctiPatchCallByReturnAddress(CodeBlock* codeblock, ReturnAddressPtr returnAddress, FunctionPtr newCalleeFunction)
+{
+ RepatchBuffer repatchBuffer(codeblock);
+ repatchBuffer.relinkCallerToFunction(returnAddress, newCalleeFunction);
+}
+
+JIT::JIT(JSGlobalData* globalData, CodeBlock* codeBlock)
+ : m_interpreter(globalData->interpreter)
+ , m_globalData(globalData)
+ , m_codeBlock(codeBlock)
+ , m_labels(codeBlock ? codeBlock->instructions().size() : 0)
+ , m_propertyAccessCompilationInfo(codeBlock ? codeBlock->numberOfStructureStubInfos() : 0)
+ , m_callStructureStubCompilationInfo(codeBlock ? codeBlock->numberOfCallLinkInfos() : 0)
+ , m_bytecodeIndex((unsigned)-1)
+#if USE(JSVALUE32_64)
+ , m_jumpTargetIndex(0)
+ , m_mappedBytecodeIndex((unsigned)-1)
+ , m_mappedVirtualRegisterIndex((unsigned)-1)
+ , m_mappedTag((RegisterID)-1)
+ , m_mappedPayload((RegisterID)-1)
+#else
+ , m_lastResultBytecodeRegister(std::numeric_limits<int>::max())
+ , m_jumpTargetsPosition(0)
+#endif
+{
+}
+
+#if USE(JSVALUE32_64)
+void JIT::emitTimeoutCheck()
+{
+ Jump skipTimeout = branchSub32(NonZero, Imm32(1), timeoutCheckRegister);
+ JITStubCall stubCall(this, cti_timeout_check);
+ stubCall.addArgument(regT1, regT0); // save last result registers.
+ stubCall.call(timeoutCheckRegister);
+ stubCall.getArgument(0, regT1, regT0); // reload last result registers.
+ skipTimeout.link(this);
+}
+#else
+void JIT::emitTimeoutCheck()
+{
+ Jump skipTimeout = branchSub32(NonZero, Imm32(1), timeoutCheckRegister);
+ JITStubCall(this, cti_timeout_check).call(timeoutCheckRegister);
+ skipTimeout.link(this);
+
+ killLastResultRegister();
+}
+#endif
+
+#define NEXT_OPCODE(name) \
+ m_bytecodeIndex += OPCODE_LENGTH(name); \
+ break;
+
+#if USE(JSVALUE32_64)
+#define DEFINE_BINARY_OP(name) \
+ case name: { \
+ JITStubCall stubCall(this, cti_##name); \
+ stubCall.addArgument(currentInstruction[2].u.operand); \
+ stubCall.addArgument(currentInstruction[3].u.operand); \
+ stubCall.call(currentInstruction[1].u.operand); \
+ NEXT_OPCODE(name); \
+ }
+
+#define DEFINE_UNARY_OP(name) \
+ case name: { \
+ JITStubCall stubCall(this, cti_##name); \
+ stubCall.addArgument(currentInstruction[2].u.operand); \
+ stubCall.call(currentInstruction[1].u.operand); \
+ NEXT_OPCODE(name); \
+ }
+
+#else // USE(JSVALUE32_64)
+
+#define DEFINE_BINARY_OP(name) \
+ case name: { \
+ JITStubCall stubCall(this, cti_##name); \
+ stubCall.addArgument(currentInstruction[2].u.operand, regT2); \
+ stubCall.addArgument(currentInstruction[3].u.operand, regT2); \
+ stubCall.call(currentInstruction[1].u.operand); \
+ NEXT_OPCODE(name); \
+ }
+
+#define DEFINE_UNARY_OP(name) \
+ case name: { \
+ JITStubCall stubCall(this, cti_##name); \
+ stubCall.addArgument(currentInstruction[2].u.operand, regT2); \
+ stubCall.call(currentInstruction[1].u.operand); \
+ NEXT_OPCODE(name); \
+ }
+#endif // USE(JSVALUE32_64)
+
+#define DEFINE_OP(name) \
+ case name: { \
+ emit_##name(currentInstruction); \
+ NEXT_OPCODE(name); \
+ }
+
+#define DEFINE_SLOWCASE_OP(name) \
+ case name: { \
+ emitSlow_##name(currentInstruction, iter); \
+ NEXT_OPCODE(name); \
+ }
+
+void JIT::privateCompileMainPass()
+{
+ Instruction* instructionsBegin = m_codeBlock->instructions().begin();
+ unsigned instructionCount = m_codeBlock->instructions().size();
+
+ m_propertyAccessInstructionIndex = 0;
+ m_globalResolveInfoIndex = 0;
+ m_callLinkInfoIndex = 0;
+
+ for (m_bytecodeIndex = 0; m_bytecodeIndex < instructionCount; ) {
+ Instruction* currentInstruction = instructionsBegin + m_bytecodeIndex;
+ ASSERT_WITH_MESSAGE(m_interpreter->isOpcode(currentInstruction->u.opcode), "privateCompileMainPass gone bad @ %d", m_bytecodeIndex);
+
+#if ENABLE(OPCODE_SAMPLING)
+ if (m_bytecodeIndex > 0) // Avoid the overhead of sampling op_enter twice.
+ sampleInstruction(currentInstruction);
+#endif
+
+#if !USE(JSVALUE32_64)
+ if (m_labels[m_bytecodeIndex].isUsed())
+ killLastResultRegister();
+#endif
+
+ m_labels[m_bytecodeIndex] = label();
+
+ switch (m_interpreter->getOpcodeID(currentInstruction->u.opcode)) {
+ DEFINE_BINARY_OP(op_del_by_val)
+#if USE(JSVALUE32)
+ DEFINE_BINARY_OP(op_div)
+#endif
+ DEFINE_BINARY_OP(op_in)
+ DEFINE_BINARY_OP(op_less)
+ DEFINE_BINARY_OP(op_lesseq)
+ DEFINE_BINARY_OP(op_urshift)
+ DEFINE_UNARY_OP(op_is_boolean)
+ DEFINE_UNARY_OP(op_is_function)
+ DEFINE_UNARY_OP(op_is_number)
+ DEFINE_UNARY_OP(op_is_object)
+ DEFINE_UNARY_OP(op_is_string)
+ DEFINE_UNARY_OP(op_is_undefined)
+#if !USE(JSVALUE32_64)
+ DEFINE_UNARY_OP(op_negate)
+#endif
+ DEFINE_UNARY_OP(op_typeof)
+
+ DEFINE_OP(op_add)
+ DEFINE_OP(op_bitand)
+ DEFINE_OP(op_bitnot)
+ DEFINE_OP(op_bitor)
+ DEFINE_OP(op_bitxor)
+ DEFINE_OP(op_call)
+ DEFINE_OP(op_call_eval)
+ DEFINE_OP(op_call_varargs)
+ DEFINE_OP(op_catch)
+ DEFINE_OP(op_construct)
+ DEFINE_OP(op_construct_verify)
+ DEFINE_OP(op_convert_this)
+ DEFINE_OP(op_init_arguments)
+ DEFINE_OP(op_create_arguments)
+ DEFINE_OP(op_debug)
+ DEFINE_OP(op_del_by_id)
+#if !USE(JSVALUE32)
+ DEFINE_OP(op_div)
+#endif
+ DEFINE_OP(op_end)
+ DEFINE_OP(op_enter)
+ DEFINE_OP(op_enter_with_activation)
+ DEFINE_OP(op_eq)
+ DEFINE_OP(op_eq_null)
+ DEFINE_OP(op_get_by_id)
+ DEFINE_OP(op_get_by_val)
+ DEFINE_OP(op_get_global_var)
+ DEFINE_OP(op_get_pnames)
+ DEFINE_OP(op_get_scoped_var)
+ DEFINE_OP(op_instanceof)
+ DEFINE_OP(op_jeq_null)
+ DEFINE_OP(op_jfalse)
+ DEFINE_OP(op_jmp)
+ DEFINE_OP(op_jmp_scopes)
+ DEFINE_OP(op_jneq_null)
+ DEFINE_OP(op_jneq_ptr)
+ DEFINE_OP(op_jnless)
+ DEFINE_OP(op_jnlesseq)
+ DEFINE_OP(op_jsr)
+ DEFINE_OP(op_jtrue)
+ DEFINE_OP(op_load_varargs)
+ DEFINE_OP(op_loop)
+ DEFINE_OP(op_loop_if_less)
+ DEFINE_OP(op_loop_if_lesseq)
+ DEFINE_OP(op_loop_if_true)
+ DEFINE_OP(op_lshift)
+ DEFINE_OP(op_method_check)
+ DEFINE_OP(op_mod)
+ DEFINE_OP(op_mov)
+ DEFINE_OP(op_mul)
+#if USE(JSVALUE32_64)
+ DEFINE_OP(op_negate)
+#endif
+ DEFINE_OP(op_neq)
+ DEFINE_OP(op_neq_null)
+ DEFINE_OP(op_new_array)
+ DEFINE_OP(op_new_error)
+ DEFINE_OP(op_new_func)
+ DEFINE_OP(op_new_func_exp)
+ DEFINE_OP(op_new_object)
+ DEFINE_OP(op_new_regexp)
+ DEFINE_OP(op_next_pname)
+ DEFINE_OP(op_not)
+ DEFINE_OP(op_nstricteq)
+ DEFINE_OP(op_pop_scope)
+ DEFINE_OP(op_post_dec)
+ DEFINE_OP(op_post_inc)
+ DEFINE_OP(op_pre_dec)
+ DEFINE_OP(op_pre_inc)
+ DEFINE_OP(op_profile_did_call)
+ DEFINE_OP(op_profile_will_call)
+ DEFINE_OP(op_push_new_scope)
+ DEFINE_OP(op_push_scope)
+ DEFINE_OP(op_put_by_id)
+ DEFINE_OP(op_put_by_index)
+ DEFINE_OP(op_put_by_val)
+ DEFINE_OP(op_put_getter)
+ DEFINE_OP(op_put_global_var)
+ DEFINE_OP(op_put_scoped_var)
+ DEFINE_OP(op_put_setter)
+ DEFINE_OP(op_resolve)
+ DEFINE_OP(op_resolve_base)
+ DEFINE_OP(op_resolve_global)
+ DEFINE_OP(op_resolve_skip)
+ DEFINE_OP(op_resolve_with_base)
+ DEFINE_OP(op_ret)
+ DEFINE_OP(op_rshift)
+ DEFINE_OP(op_sret)
+ DEFINE_OP(op_strcat)
+ DEFINE_OP(op_stricteq)
+ DEFINE_OP(op_sub)
+ DEFINE_OP(op_switch_char)
+ DEFINE_OP(op_switch_imm)
+ DEFINE_OP(op_switch_string)
+ DEFINE_OP(op_tear_off_activation)
+ DEFINE_OP(op_tear_off_arguments)
+ DEFINE_OP(op_throw)
+ DEFINE_OP(op_to_jsnumber)
+ DEFINE_OP(op_to_primitive)
+
+ case op_get_array_length:
+ case op_get_by_id_chain:
+ case op_get_by_id_generic:
+ case op_get_by_id_proto:
+ case op_get_by_id_proto_list:
+ case op_get_by_id_self:
+ case op_get_by_id_self_list:
+ case op_get_string_length:
+ case op_put_by_id_generic:
+ case op_put_by_id_replace:
+ case op_put_by_id_transition:
+ ASSERT_NOT_REACHED();
+ }
+ }
+
+ ASSERT(m_propertyAccessInstructionIndex == m_codeBlock->numberOfStructureStubInfos());
+ ASSERT(m_callLinkInfoIndex == m_codeBlock->numberOfCallLinkInfos());
+
+#ifndef NDEBUG
+ // Reset this, in order to guard its use with ASSERTs.
+ m_bytecodeIndex = (unsigned)-1;
+#endif
+}
+
+
+void JIT::privateCompileLinkPass()
+{
+ unsigned jmpTableCount = m_jmpTable.size();
+ for (unsigned i = 0; i < jmpTableCount; ++i)
+ m_jmpTable[i].from.linkTo(m_labels[m_jmpTable[i].toBytecodeIndex], this);
+ m_jmpTable.clear();
+}
+
+void JIT::privateCompileSlowCases()
+{
+ Instruction* instructionsBegin = m_codeBlock->instructions().begin();
+
+ m_propertyAccessInstructionIndex = 0;
+#if USE(JSVALUE32_64)
+ m_globalResolveInfoIndex = 0;
+#endif
+ m_callLinkInfoIndex = 0;
+
+ for (Vector<SlowCaseEntry>::iterator iter = m_slowCases.begin(); iter != m_slowCases.end();) {
+#if !USE(JSVALUE32_64)
+ killLastResultRegister();
+#endif
+
+ m_bytecodeIndex = iter->to;
+#ifndef NDEBUG
+ unsigned firstTo = m_bytecodeIndex;
+#endif
+ Instruction* currentInstruction = instructionsBegin + m_bytecodeIndex;
+
+ switch (m_interpreter->getOpcodeID(currentInstruction->u.opcode)) {
+ DEFINE_SLOWCASE_OP(op_add)
+ DEFINE_SLOWCASE_OP(op_bitand)
+ DEFINE_SLOWCASE_OP(op_bitnot)
+ DEFINE_SLOWCASE_OP(op_bitor)
+ DEFINE_SLOWCASE_OP(op_bitxor)
+ DEFINE_SLOWCASE_OP(op_call)
+ DEFINE_SLOWCASE_OP(op_call_eval)
+ DEFINE_SLOWCASE_OP(op_call_varargs)
+ DEFINE_SLOWCASE_OP(op_construct)
+ DEFINE_SLOWCASE_OP(op_construct_verify)
+ DEFINE_SLOWCASE_OP(op_convert_this)
+#if !USE(JSVALUE32)
+ DEFINE_SLOWCASE_OP(op_div)
+#endif
+ DEFINE_SLOWCASE_OP(op_eq)
+ DEFINE_SLOWCASE_OP(op_get_by_id)
+ DEFINE_SLOWCASE_OP(op_get_by_val)
+ DEFINE_SLOWCASE_OP(op_instanceof)
+ DEFINE_SLOWCASE_OP(op_jfalse)
+ DEFINE_SLOWCASE_OP(op_jnless)
+ DEFINE_SLOWCASE_OP(op_jnlesseq)
+ DEFINE_SLOWCASE_OP(op_jtrue)
+ DEFINE_SLOWCASE_OP(op_loop_if_less)
+ DEFINE_SLOWCASE_OP(op_loop_if_lesseq)
+ DEFINE_SLOWCASE_OP(op_loop_if_true)
+ DEFINE_SLOWCASE_OP(op_lshift)
+ DEFINE_SLOWCASE_OP(op_method_check)
+ DEFINE_SLOWCASE_OP(op_mod)
+ DEFINE_SLOWCASE_OP(op_mul)
+#if USE(JSVALUE32_64)
+ DEFINE_SLOWCASE_OP(op_negate)
+#endif
+ DEFINE_SLOWCASE_OP(op_neq)
+ DEFINE_SLOWCASE_OP(op_not)
+ DEFINE_SLOWCASE_OP(op_nstricteq)
+ DEFINE_SLOWCASE_OP(op_post_dec)
+ DEFINE_SLOWCASE_OP(op_post_inc)
+ DEFINE_SLOWCASE_OP(op_pre_dec)
+ DEFINE_SLOWCASE_OP(op_pre_inc)
+ DEFINE_SLOWCASE_OP(op_put_by_id)
+ DEFINE_SLOWCASE_OP(op_put_by_val)
+#if USE(JSVALUE32_64)
+ DEFINE_SLOWCASE_OP(op_resolve_global)
+#endif
+ DEFINE_SLOWCASE_OP(op_rshift)
+ DEFINE_SLOWCASE_OP(op_stricteq)
+ DEFINE_SLOWCASE_OP(op_sub)
+ DEFINE_SLOWCASE_OP(op_to_jsnumber)
+ DEFINE_SLOWCASE_OP(op_to_primitive)
+ default:
+ ASSERT_NOT_REACHED();
+ }
+
+ ASSERT_WITH_MESSAGE(iter == m_slowCases.end() || firstTo != iter->to,"Not enough jumps linked in slow case codegen.");
+ ASSERT_WITH_MESSAGE(firstTo == (iter - 1)->to, "Too many jumps linked in slow case codegen.");
+
+ emitJumpSlowToHot(jump(), 0);
+ }
+
+#if ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
+ ASSERT(m_propertyAccessInstructionIndex == m_codeBlock->numberOfStructureStubInfos());
+#endif
+ ASSERT(m_callLinkInfoIndex == m_codeBlock->numberOfCallLinkInfos());
+
+#ifndef NDEBUG
+ // Reset this, in order to guard its use with ASSERTs.
+ m_bytecodeIndex = (unsigned)-1;
+#endif
+}
+
+JITCode JIT::privateCompile()
+{
+ sampleCodeBlock(m_codeBlock);
+#if ENABLE(OPCODE_SAMPLING)
+ sampleInstruction(m_codeBlock->instructions().begin());
+#endif
+
+ // Could use a pop_m, but would need to offset the following instruction if so.
+ preserveReturnAddressAfterCall(regT2);
+ emitPutToCallFrameHeader(regT2, RegisterFile::ReturnPC);
+
+ Jump slowRegisterFileCheck;
+ Label afterRegisterFileCheck;
+ if (m_codeBlock->codeType() == FunctionCode) {
+ // In the case of a fast linked call, we do not set this up in the caller.
+ emitPutImmediateToCallFrameHeader(m_codeBlock, RegisterFile::CodeBlock);
+
+ peek(regT0, OBJECT_OFFSETOF(JITStackFrame, registerFile) / sizeof (void*));
+ addPtr(Imm32(m_codeBlock->m_numCalleeRegisters * sizeof(Register)), callFrameRegister, regT1);
+
+ slowRegisterFileCheck = branchPtr(Above, regT1, Address(regT0, OBJECT_OFFSETOF(RegisterFile, m_end)));
+ afterRegisterFileCheck = label();
+ }
+
+ privateCompileMainPass();
+ privateCompileLinkPass();
+ privateCompileSlowCases();
+
+ if (m_codeBlock->codeType() == FunctionCode) {
+ slowRegisterFileCheck.link(this);
+ m_bytecodeIndex = 0;
+ JITStubCall(this, cti_register_file_check).call();
+#ifndef NDEBUG
+ m_bytecodeIndex = (unsigned)-1; // Reset this, in order to guard its use with ASSERTs.
+#endif
+ jump(afterRegisterFileCheck);
+ }
+
+ ASSERT(m_jmpTable.isEmpty());
+
+ LinkBuffer patchBuffer(this, m_globalData->executableAllocator.poolForSize(m_assembler.size()));
+
+ // Translate vPC offsets into addresses in JIT generated code, for switch tables.
+ for (unsigned i = 0; i < m_switches.size(); ++i) {
+ SwitchRecord record = m_switches[i];
+ unsigned bytecodeIndex = record.bytecodeIndex;
+
+ if (record.type != SwitchRecord::String) {
+ ASSERT(record.type == SwitchRecord::Immediate || record.type == SwitchRecord::Character);
+ ASSERT(record.jumpTable.simpleJumpTable->branchOffsets.size() == record.jumpTable.simpleJumpTable->ctiOffsets.size());
+
+ record.jumpTable.simpleJumpTable->ctiDefault = patchBuffer.locationOf(m_labels[bytecodeIndex + record.defaultOffset]);
+
+ for (unsigned j = 0; j < record.jumpTable.simpleJumpTable->branchOffsets.size(); ++j) {
+ unsigned offset = record.jumpTable.simpleJumpTable->branchOffsets[j];
+ record.jumpTable.simpleJumpTable->ctiOffsets[j] = offset ? patchBuffer.locationOf(m_labels[bytecodeIndex + offset]) : record.jumpTable.simpleJumpTable->ctiDefault;
+ }
+ } else {
+ ASSERT(record.type == SwitchRecord::String);
+
+ record.jumpTable.stringJumpTable->ctiDefault = patchBuffer.locationOf(m_labels[bytecodeIndex + record.defaultOffset]);
+
+ StringJumpTable::StringOffsetTable::iterator end = record.jumpTable.stringJumpTable->offsetTable.end();
+ for (StringJumpTable::StringOffsetTable::iterator it = record.jumpTable.stringJumpTable->offsetTable.begin(); it != end; ++it) {
+ unsigned offset = it->second.branchOffset;
+ it->second.ctiOffset = offset ? patchBuffer.locationOf(m_labels[bytecodeIndex + offset]) : record.jumpTable.stringJumpTable->ctiDefault;
+ }
+ }
+ }
+
+ for (size_t i = 0; i < m_codeBlock->numberOfExceptionHandlers(); ++i) {
+ HandlerInfo& handler = m_codeBlock->exceptionHandler(i);
+ handler.nativeCode = patchBuffer.locationOf(m_labels[handler.target]);
+ }
+
+ for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) {
+ if (iter->to)
+ patchBuffer.link(iter->from, FunctionPtr(iter->to));
+ }
+
+ if (m_codeBlock->hasExceptionInfo()) {
+ m_codeBlock->callReturnIndexVector().reserveCapacity(m_calls.size());
+ for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter)
+ m_codeBlock->callReturnIndexVector().append(CallReturnOffsetToBytecodeIndex(patchBuffer.returnAddressOffset(iter->from), iter->bytecodeIndex));
+ }
+
+ // Link absolute addresses for jsr
+ for (Vector<JSRInfo>::iterator iter = m_jsrSites.begin(); iter != m_jsrSites.end(); ++iter)
+ patchBuffer.patch(iter->storeLocation, patchBuffer.locationOf(iter->target).executableAddress());
+
+#if ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
+ for (unsigned i = 0; i < m_codeBlock->numberOfStructureStubInfos(); ++i) {
+ StructureStubInfo& info = m_codeBlock->structureStubInfo(i);
+ info.callReturnLocation = patchBuffer.locationOf(m_propertyAccessCompilationInfo[i].callReturnLocation);
+ info.hotPathBegin = patchBuffer.locationOf(m_propertyAccessCompilationInfo[i].hotPathBegin);
+ }
+#endif
+#if ENABLE(JIT_OPTIMIZE_CALL)
+ for (unsigned i = 0; i < m_codeBlock->numberOfCallLinkInfos(); ++i) {
+ CallLinkInfo& info = m_codeBlock->callLinkInfo(i);
+ info.ownerCodeBlock = m_codeBlock;
+ info.callReturnLocation = patchBuffer.locationOfNearCall(m_callStructureStubCompilationInfo[i].callReturnLocation);
+ info.hotPathBegin = patchBuffer.locationOf(m_callStructureStubCompilationInfo[i].hotPathBegin);
+ info.hotPathOther = patchBuffer.locationOfNearCall(m_callStructureStubCompilationInfo[i].hotPathOther);
+ }
+#endif
+ unsigned methodCallCount = m_methodCallCompilationInfo.size();
+ m_codeBlock->addMethodCallLinkInfos(methodCallCount);
+ for (unsigned i = 0; i < methodCallCount; ++i) {
+ MethodCallLinkInfo& info = m_codeBlock->methodCallLinkInfo(i);
+ info.structureLabel = patchBuffer.locationOf(m_methodCallCompilationInfo[i].structureToCompare);
+ info.callReturnLocation = m_codeBlock->structureStubInfo(m_methodCallCompilationInfo[i].propertyAccessIndex).callReturnLocation;
+ }
+
+ return patchBuffer.finalizeCode();
+}
+
+#if !USE(JSVALUE32_64)
+void JIT::emitGetVariableObjectRegister(RegisterID variableObject, int index, RegisterID dst)
+{
+ loadPtr(Address(variableObject, OBJECT_OFFSETOF(JSVariableObject, d)), dst);
+ loadPtr(Address(dst, OBJECT_OFFSETOF(JSVariableObject::JSVariableObjectData, registers)), dst);
+ loadPtr(Address(dst, index * sizeof(Register)), dst);
+}
+
+void JIT::emitPutVariableObjectRegister(RegisterID src, RegisterID variableObject, int index)
+{
+ loadPtr(Address(variableObject, OBJECT_OFFSETOF(JSVariableObject, d)), variableObject);
+ loadPtr(Address(variableObject, OBJECT_OFFSETOF(JSVariableObject::JSVariableObjectData, registers)), variableObject);
+ storePtr(src, Address(variableObject, index * sizeof(Register)));
+}
+#endif
+
+#if ENABLE(JIT_OPTIMIZE_CALL)
+void JIT::unlinkCall(CallLinkInfo* callLinkInfo)
+{
+ // When the JSFunction is deleted the pointer embedded in the instruction stream will no longer be valid
+ // (and, if a new JSFunction happened to be constructed at the same location, we could get a false positive
+ // match). Reset the check so it no longer matches.
+ RepatchBuffer repatchBuffer(callLinkInfo->ownerCodeBlock.get());
+#if USE(JSVALUE32_64)
+ repatchBuffer.repatch(callLinkInfo->hotPathBegin, 0);
+#else
+ repatchBuffer.repatch(callLinkInfo->hotPathBegin, JSValue::encode(JSValue()));
+#endif
+}
+
+void JIT::linkCall(JSFunction* callee, CodeBlock* callerCodeBlock, CodeBlock* calleeCodeBlock, JITCode& code, CallLinkInfo* callLinkInfo, int callerArgCount, JSGlobalData* globalData)
+{
+ RepatchBuffer repatchBuffer(callerCodeBlock);
+
+ // Currently we only link calls with the exact number of arguments.
+ // If this is a native call calleeCodeBlock is null so the number of parameters is unimportant
+ if (!calleeCodeBlock || (callerArgCount == calleeCodeBlock->m_numParameters)) {
+ ASSERT(!callLinkInfo->isLinked());
+
+ if (calleeCodeBlock)
+ calleeCodeBlock->addCaller(callLinkInfo);
+
+ repatchBuffer.repatch(callLinkInfo->hotPathBegin, callee);
+ repatchBuffer.relink(callLinkInfo->hotPathOther, code.addressForCall());
+ }
+
+ // patch the call so we do not continue to try to link.
+ repatchBuffer.relink(callLinkInfo->callReturnLocation, globalData->jitStubs.ctiVirtualCall());
+}
+#endif // ENABLE(JIT_OPTIMIZE_CALL)
+
+} // namespace JSC
+
+#endif // ENABLE(JIT)