JavaScriptCore-1218.0.1.tar.gz

[apple/javascriptcore.git] / jit / JIT.cpp

diff --git a/jit/JIT.cpp b/jit/JIT.cpp
index 74d7312317690d80e0416fb1de918d74765ef000..8e003c782f5b71db8c670cd263cb1992781982a1 100644 (file)
--- a/jit/JIT.cpp
+++ b/jit/JIT.cpp
@@ -1,5 +1,5 @@
 /*
 /*

- * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
+ * Copyright (C) 2008, 2009, 2012, 2013 Apple Inc. All rights reserved.

  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions


@@ -24,32 +24,30 @@
  */
 
 #include "config.h"
  */
 
 #include "config.h"

+
+#if ENABLE(JIT)

 #include "JIT.h"
 
 // This probably does not belong here; adding here for now as a quick Windows build fix.
 #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)
+#if ENABLE(ASSEMBLER) && CPU(X86) && !OS(MAC_OS_X)

 #include "MacroAssembler.h"
 JSC::MacroAssemblerX86Common::SSE2CheckState JSC::MacroAssemblerX86Common::s_sse2CheckState = NotCheckedSSE2;
 #endif
 
 #include "MacroAssembler.h"
 JSC::MacroAssemblerX86Common::SSE2CheckState JSC::MacroAssemblerX86Common::s_sse2CheckState = NotCheckedSSE2;
 #endif
 

-#if ENABLE(JIT)
-

 #include "CodeBlock.h"
 #include "CodeBlock.h"

+#include <wtf/CryptographicallyRandomNumber.h>
+#include "DFGNode.h" // for DFG_SUCCESS_STATS

 #include "Interpreter.h"
 #include "Interpreter.h"

-#include "JITInlineMethods.h"
-#include "JITStubs.h"
+#include "JITInlines.h"

 #include "JITStubCall.h"
 #include "JSArray.h"
 #include "JSFunction.h"
 #include "LinkBuffer.h"
 #include "JITStubCall.h"
 #include "JSArray.h"
 #include "JSFunction.h"
 #include "LinkBuffer.h"

+#include "Operations.h"

 #include "RepatchBuffer.h"
 #include "ResultType.h"
 #include "SamplingTool.h"
 
 #include "RepatchBuffer.h"
 #include "ResultType.h"
 #include "SamplingTool.h"
 

-#ifndef NDEBUG
-#include <stdio.h>
-#endif
-

 using namespace std;
 
 namespace JSC {
 using namespace std;
 
 namespace JSC {


@@ -72,50 +70,51 @@ void ctiPatchCallByReturnAddress(CodeBlock* codeblock, ReturnAddressPtr returnAd
     repatchBuffer.relinkCallerToFunction(returnAddress, newCalleeFunction);
 }
 
     repatchBuffer.relinkCallerToFunction(returnAddress, newCalleeFunction);
 }
 

-JIT::JIT(JSGlobalData* globalData, CodeBlock* codeBlock)
-    : m_interpreter(globalData->interpreter)
-    , m_globalData(globalData)
+JIT::JIT(VM* vm, CodeBlock* codeBlock)
+    : m_interpreter(vm->interpreter)
+    , m_vm(vm)

     , m_codeBlock(codeBlock)
     , 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)
+    , m_labels(codeBlock ? codeBlock->numberOfInstructions() : 0)
+    , m_bytecodeOffset((unsigned)-1)
+    , m_propertyAccessInstructionIndex(UINT_MAX)
+    , m_byValInstructionIndex(UINT_MAX)
+    , m_globalResolveInfoIndex(UINT_MAX)
+    , m_callLinkInfoIndex(UINT_MAX)

 #if USE(JSVALUE32_64)
     , m_jumpTargetIndex(0)
 #if USE(JSVALUE32_64)
     , m_jumpTargetIndex(0)

-    , m_mappedBytecodeIndex((unsigned)-1)
-    , m_mappedVirtualRegisterIndex((unsigned)-1)
+    , m_mappedBytecodeOffset((unsigned)-1)
+    , m_mappedVirtualRegisterIndex(JSStack::ReturnPC)

     , m_mappedTag((RegisterID)-1)
     , m_mappedPayload((RegisterID)-1)
 #else
     , m_lastResultBytecodeRegister(std::numeric_limits<int>::max())
     , m_jumpTargetsPosition(0)
     , m_mappedTag((RegisterID)-1)
     , m_mappedPayload((RegisterID)-1)
 #else
     , m_lastResultBytecodeRegister(std::numeric_limits<int>::max())
     , m_jumpTargetsPosition(0)

+#endif
+    , m_randomGenerator(cryptographicallyRandomNumber())
+#if ENABLE(VALUE_PROFILER)
+    , m_canBeOptimized(false)
+    , m_shouldEmitProfiling(false)

 #endif
 {
 }
 
 #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()
+#if ENABLE(DFG_JIT)
+void JIT::emitEnterOptimizationCheck()

 {
 {

-    Jump skipTimeout = branchSub32(NonZero, Imm32(1), timeoutCheckRegister);
-    JITStubCall(this, cti_timeout_check).call(timeoutCheckRegister);
-    skipTimeout.link(this);
-
-    killLastResultRegister();
+    if (!canBeOptimized())
+        return;
+
+    Jump skipOptimize = branchAdd32(Signed, TrustedImm32(Options::executionCounterIncrementForReturn()), AbsoluteAddress(m_codeBlock->addressOfJITExecuteCounter()));
+    JITStubCall stubCall(this, cti_optimize);
+    stubCall.addArgument(TrustedImm32(m_bytecodeOffset));
+    ASSERT(!m_bytecodeOffset);
+    stubCall.call();
+    skipOptimize.link(this);

 }
 #endif
 
 #define NEXT_OPCODE(name) \
 }
 #endif
 
 #define NEXT_OPCODE(name) \

-    m_bytecodeIndex += OPCODE_LENGTH(name); \
+    m_bytecodeOffset += OPCODE_LENGTH(name); \

     break;
 
 #if USE(JSVALUE32_64)
     break;
 
 #if USE(JSVALUE32_64)


@@ -173,50 +172,53 @@ void JIT::privateCompileMainPass()
     Instruction* instructionsBegin = m_codeBlock->instructions().begin();
     unsigned instructionCount = m_codeBlock->instructions().size();
 
     Instruction* instructionsBegin = m_codeBlock->instructions().begin();
     unsigned instructionCount = m_codeBlock->instructions().size();
 

-    m_propertyAccessInstructionIndex = 0;

     m_globalResolveInfoIndex = 0;
     m_callLinkInfoIndex = 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);
+    for (m_bytecodeOffset = 0; m_bytecodeOffset < instructionCount; ) {
+        if (m_disassembler)
+            m_disassembler->setForBytecodeMainPath(m_bytecodeOffset, label());
+        Instruction* currentInstruction = instructionsBegin + m_bytecodeOffset;
+        ASSERT_WITH_MESSAGE(m_interpreter->isOpcode(currentInstruction->u.opcode), "privateCompileMainPass gone bad @ %d", m_bytecodeOffset);

 
 #if ENABLE(OPCODE_SAMPLING)
 
 #if ENABLE(OPCODE_SAMPLING)

-        if (m_bytecodeIndex > 0) // Avoid the overhead of sampling op_enter twice.
+        if (m_bytecodeOffset > 0) // Avoid the overhead of sampling op_enter twice.

             sampleInstruction(currentInstruction);
 #endif
 
             sampleInstruction(currentInstruction);
 #endif
 

-#if !USE(JSVALUE32_64)
-        if (m_labels[m_bytecodeIndex].isUsed())
+#if USE(JSVALUE64)
+        if (atJumpTarget())

             killLastResultRegister();
 #endif
 
             killLastResultRegister();
 #endif
 

-        m_labels[m_bytecodeIndex] = label();
+        m_labels[m_bytecodeOffset] = label();

 
 

-        switch (m_interpreter->getOpcodeID(currentInstruction->u.opcode)) {
-        DEFINE_BINARY_OP(op_del_by_val)
-#if !USE(JSVALUE32_64)
-        DEFINE_BINARY_OP(op_div)
+#if ENABLE(JIT_VERBOSE)
+        dataLogF("Old JIT emitting code for bc#%u at offset 0x%lx.\n", m_bytecodeOffset, (long)debugOffset());

 #endif
 #endif

+        
+        OpcodeID opcodeID = m_interpreter->getOpcodeID(currentInstruction->u.opcode);
+
+        if (m_compilation && opcodeID != op_call_put_result) {
+            add64(
+                TrustedImm32(1),
+                AbsoluteAddress(m_compilation->executionCounterFor(Profiler::OriginStack(Profiler::Origin(
+                    m_compilation->bytecodes(), m_bytecodeOffset)))->address()));
+        }
+
+        switch (opcodeID) {
+        DEFINE_BINARY_OP(op_del_by_val)

         DEFINE_BINARY_OP(op_in)
         DEFINE_BINARY_OP(op_less)
         DEFINE_BINARY_OP(op_lesseq)
         DEFINE_BINARY_OP(op_in)
         DEFINE_BINARY_OP(op_less)
         DEFINE_BINARY_OP(op_lesseq)

-        DEFINE_BINARY_OP(op_urshift)
-        DEFINE_UNARY_OP(op_get_pnames)
-        DEFINE_UNARY_OP(op_is_boolean)
+        DEFINE_BINARY_OP(op_greater)
+        DEFINE_BINARY_OP(op_greatereq)

         DEFINE_UNARY_OP(op_is_function)
         DEFINE_UNARY_OP(op_is_function)

-        DEFINE_UNARY_OP(op_is_number)

         DEFINE_UNARY_OP(op_is_object)
         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_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_bitor)
         DEFINE_OP(op_bitxor)
         DEFINE_OP(op_call)


@@ -224,52 +226,58 @@ void JIT::privateCompileMainPass()
         DEFINE_OP(op_call_varargs)
         DEFINE_OP(op_catch)
         DEFINE_OP(op_construct)
         DEFINE_OP(op_call_varargs)
         DEFINE_OP(op_catch)
         DEFINE_OP(op_construct)

-        DEFINE_OP(op_construct_verify)
+        DEFINE_OP(op_get_callee)
+        DEFINE_OP(op_create_this)

         DEFINE_OP(op_convert_this)
         DEFINE_OP(op_convert_this)

-        DEFINE_OP(op_init_arguments)
+        DEFINE_OP(op_init_lazy_reg)

         DEFINE_OP(op_create_arguments)
         DEFINE_OP(op_debug)
         DEFINE_OP(op_del_by_id)
         DEFINE_OP(op_create_arguments)
         DEFINE_OP(op_debug)
         DEFINE_OP(op_del_by_id)

-#if USE(JSVALUE32_64)

         DEFINE_OP(op_div)
         DEFINE_OP(op_div)

-#endif

         DEFINE_OP(op_end)
         DEFINE_OP(op_enter)
         DEFINE_OP(op_end)
         DEFINE_OP(op_enter)

-        DEFINE_OP(op_enter_with_activation)
+        DEFINE_OP(op_create_activation)

         DEFINE_OP(op_eq)
         DEFINE_OP(op_eq_null)
         DEFINE_OP(op_eq)
         DEFINE_OP(op_eq_null)

+        case op_get_by_id_out_of_line:
+        case op_get_array_length:

         DEFINE_OP(op_get_by_id)
         DEFINE_OP(op_get_by_id)

+        DEFINE_OP(op_get_arguments_length)

         DEFINE_OP(op_get_by_val)
         DEFINE_OP(op_get_by_val)

-        DEFINE_OP(op_get_global_var)
-        DEFINE_OP(op_get_scoped_var)
+        DEFINE_OP(op_get_argument_by_val)
+        DEFINE_OP(op_get_by_pname)
+        DEFINE_OP(op_get_pnames)
+        DEFINE_OP(op_check_has_instance)

         DEFINE_OP(op_instanceof)
         DEFINE_OP(op_instanceof)

+        DEFINE_OP(op_is_undefined)
+        DEFINE_OP(op_is_boolean)
+        DEFINE_OP(op_is_number)
+        DEFINE_OP(op_is_string)

         DEFINE_OP(op_jeq_null)
         DEFINE_OP(op_jfalse)
         DEFINE_OP(op_jmp)
         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_jneq_null)
         DEFINE_OP(op_jneq_ptr)

+        DEFINE_OP(op_jless)
+        DEFINE_OP(op_jlesseq)
+        DEFINE_OP(op_jgreater)
+        DEFINE_OP(op_jgreatereq)

         DEFINE_OP(op_jnless)
         DEFINE_OP(op_jnlesseq)
         DEFINE_OP(op_jnless)
         DEFINE_OP(op_jnlesseq)

-        DEFINE_OP(op_jsr)
+        DEFINE_OP(op_jngreater)
+        DEFINE_OP(op_jngreatereq)

         DEFINE_OP(op_jtrue)
         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_loop_hint)

         DEFINE_OP(op_lshift)
         DEFINE_OP(op_lshift)

-        DEFINE_OP(op_method_check)

         DEFINE_OP(op_mod)
         DEFINE_OP(op_mov)
         DEFINE_OP(op_mul)
         DEFINE_OP(op_mod)
         DEFINE_OP(op_mov)
         DEFINE_OP(op_mul)

-#if USE(JSVALUE32_64)

         DEFINE_OP(op_negate)
         DEFINE_OP(op_negate)

-#endif

         DEFINE_OP(op_neq)
         DEFINE_OP(op_neq_null)
         DEFINE_OP(op_new_array)
         DEFINE_OP(op_neq)
         DEFINE_OP(op_neq_null)
         DEFINE_OP(op_new_array)

-        DEFINE_OP(op_new_error)
+        DEFINE_OP(op_new_array_with_size)
+        DEFINE_OP(op_new_array_buffer)

         DEFINE_OP(op_new_func)
         DEFINE_OP(op_new_func_exp)
         DEFINE_OP(op_new_object)
         DEFINE_OP(op_new_func)
         DEFINE_OP(op_new_func_exp)
         DEFINE_OP(op_new_object)


@@ -278,29 +286,49 @@ void JIT::privateCompileMainPass()
         DEFINE_OP(op_not)
         DEFINE_OP(op_nstricteq)
         DEFINE_OP(op_pop_scope)
         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_dec)
+        DEFINE_OP(op_inc)

         DEFINE_OP(op_profile_did_call)
         DEFINE_OP(op_profile_will_call)
         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_push_name_scope)
+        DEFINE_OP(op_push_with_scope)
+        case op_put_by_id_out_of_line:
+        case op_put_by_id_transition_direct:
+        case op_put_by_id_transition_normal:
+        case op_put_by_id_transition_direct_out_of_line:
+        case op_put_by_id_transition_normal_out_of_line:

         DEFINE_OP(op_put_by_id)
         DEFINE_OP(op_put_by_index)
         DEFINE_OP(op_put_by_val)
         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_put_getter_setter)
+        case op_init_global_const_nop:
+            NEXT_OPCODE(op_init_global_const_nop);
+        DEFINE_OP(op_init_global_const)
+        DEFINE_OP(op_init_global_const_check)
+
+        case op_resolve_global_property:
+        case op_resolve_global_var:
+        case op_resolve_scoped_var:
+        case op_resolve_scoped_var_on_top_scope:
+        case op_resolve_scoped_var_with_top_scope_check:

         DEFINE_OP(op_resolve)
         DEFINE_OP(op_resolve)

+
+        case op_resolve_base_to_global:
+        case op_resolve_base_to_global_dynamic:
+        case op_resolve_base_to_scope:
+        case op_resolve_base_to_scope_with_top_scope_check:

         DEFINE_OP(op_resolve_base)
         DEFINE_OP(op_resolve_base)

-        DEFINE_OP(op_resolve_global)
-        DEFINE_OP(op_resolve_skip)
+
+        case op_put_to_base_variable:
+        DEFINE_OP(op_put_to_base)
+

         DEFINE_OP(op_resolve_with_base)
         DEFINE_OP(op_resolve_with_base)

+        DEFINE_OP(op_resolve_with_this)

         DEFINE_OP(op_ret)
         DEFINE_OP(op_ret)

+        DEFINE_OP(op_call_put_result)
+        DEFINE_OP(op_ret_object_or_this)

         DEFINE_OP(op_rshift)
         DEFINE_OP(op_rshift)

-        DEFINE_OP(op_sret)
+        DEFINE_OP(op_urshift)

         DEFINE_OP(op_strcat)
         DEFINE_OP(op_stricteq)
         DEFINE_OP(op_sub)
         DEFINE_OP(op_strcat)
         DEFINE_OP(op_stricteq)
         DEFINE_OP(op_sub)


@@ -310,39 +338,44 @@ void JIT::privateCompileMainPass()
         DEFINE_OP(op_tear_off_activation)
         DEFINE_OP(op_tear_off_arguments)
         DEFINE_OP(op_throw)
         DEFINE_OP(op_tear_off_activation)
         DEFINE_OP(op_tear_off_arguments)
         DEFINE_OP(op_throw)

-        DEFINE_OP(op_to_jsnumber)
+        DEFINE_OP(op_throw_static_error)
+        DEFINE_OP(op_to_number)

         DEFINE_OP(op_to_primitive)
 
         DEFINE_OP(op_to_primitive)
 

-        case op_get_array_length:
+        DEFINE_OP(op_get_scoped_var)
+        DEFINE_OP(op_put_scoped_var)
+

         case op_get_by_id_chain:
         case op_get_by_id_generic:
         case op_get_by_id_proto:
         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:

-        case op_get_by_id_self_list:
+        case op_get_by_id_getter_chain:
+        case op_get_by_id_getter_proto:
+        case op_get_by_id_getter_self:
+        case op_get_by_id_custom_chain:
+        case op_get_by_id_custom_proto:
+        case op_get_by_id_custom_self:

         case op_get_string_length:
         case op_put_by_id_generic:
         case op_put_by_id_replace:
         case op_put_by_id_transition:
         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();
+            RELEASE_ASSERT_NOT_REACHED();

         }
     }
 
         }
     }
 

-    ASSERT(m_propertyAccessInstructionIndex == m_codeBlock->numberOfStructureStubInfos());
-    ASSERT(m_callLinkInfoIndex == m_codeBlock->numberOfCallLinkInfos());
+    RELEASE_ASSERT(m_callLinkInfoIndex == m_callStructureStubCompilationInfo.size());

 
 #ifndef NDEBUG
     // Reset this, in order to guard its use with ASSERTs.
 
 #ifndef NDEBUG
     // Reset this, in order to guard its use with ASSERTs.

-    m_bytecodeIndex = (unsigned)-1;
+    m_bytecodeOffset = (unsigned)-1;

 #endif
 }
 
 #endif
 }
 

-

 void JIT::privateCompileLinkPass()
 {
     unsigned jmpTableCount = m_jmpTable.size();
     for (unsigned i = 0; i < jmpTableCount; ++i)
 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[i].from.linkTo(m_labels[m_jmpTable[i].toBytecodeOffset], this);

     m_jmpTable.clear();
 }
 
     m_jmpTable.clear();
 }
 


@@ -351,159 +384,340 @@ void JIT::privateCompileSlowCases()
     Instruction* instructionsBegin = m_codeBlock->instructions().begin();
 
     m_propertyAccessInstructionIndex = 0;
     Instruction* instructionsBegin = m_codeBlock->instructions().begin();
 
     m_propertyAccessInstructionIndex = 0;

-#if USE(JSVALUE32_64)
+    m_byValInstructionIndex = 0;

     m_globalResolveInfoIndex = 0;
     m_globalResolveInfoIndex = 0;

-#endif

     m_callLinkInfoIndex = 0;
     m_callLinkInfoIndex = 0;

+    
+#if ENABLE(VALUE_PROFILER)
+    // Use this to assert that slow-path code associates new profiling sites with existing
+    // ValueProfiles rather than creating new ones. This ensures that for a given instruction
+    // (say, get_by_id) we get combined statistics for both the fast-path executions of that
+    // instructions and the slow-path executions. Furthermore, if the slow-path code created
+    // new ValueProfiles then the ValueProfiles would no longer be sorted by bytecode offset,
+    // which would break the invariant necessary to use CodeBlock::valueProfileForBytecodeOffset().
+    unsigned numberOfValueProfiles = m_codeBlock->numberOfValueProfiles();
+#endif

 
     for (Vector<SlowCaseEntry>::iterator iter = m_slowCases.begin(); iter != m_slowCases.end();) {
 
     for (Vector<SlowCaseEntry>::iterator iter = m_slowCases.begin(); iter != m_slowCases.end();) {

-#if !USE(JSVALUE32_64)
+#if USE(JSVALUE64)

         killLastResultRegister();
 #endif
 
         killLastResultRegister();
 #endif
 

-        m_bytecodeIndex = iter->to;
-#ifndef NDEBUG
-        unsigned firstTo = m_bytecodeIndex;
+        m_bytecodeOffset = iter->to;
+
+        unsigned firstTo = m_bytecodeOffset;
+
+        Instruction* currentInstruction = instructionsBegin + m_bytecodeOffset;
+        
+#if ENABLE(VALUE_PROFILER)
+        RareCaseProfile* rareCaseProfile = 0;
+        if (shouldEmitProfiling())
+            rareCaseProfile = m_codeBlock->addRareCaseProfile(m_bytecodeOffset);
+#endif
+
+#if ENABLE(JIT_VERBOSE)
+        dataLogF("Old JIT emitting slow code for bc#%u at offset 0x%lx.\n", m_bytecodeOffset, (long)debugOffset());

 #endif
 #endif

-        Instruction* currentInstruction = instructionsBegin + m_bytecodeIndex;
+        
+        if (m_disassembler)
+            m_disassembler->setForBytecodeSlowPath(m_bytecodeOffset, label());

 
         switch (m_interpreter->getOpcodeID(currentInstruction->u.opcode)) {
         DEFINE_SLOWCASE_OP(op_add)
         DEFINE_SLOWCASE_OP(op_bitand)
 
         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_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)
         DEFINE_SLOWCASE_OP(op_convert_this)

-#if USE(JSVALUE32_64)
+        DEFINE_SLOWCASE_OP(op_create_this)

         DEFINE_SLOWCASE_OP(op_div)
         DEFINE_SLOWCASE_OP(op_div)

-#endif

         DEFINE_SLOWCASE_OP(op_eq)
         DEFINE_SLOWCASE_OP(op_eq)

+        case op_get_by_id_out_of_line:
+        case op_get_array_length:

         DEFINE_SLOWCASE_OP(op_get_by_id)
         DEFINE_SLOWCASE_OP(op_get_by_id)

+        DEFINE_SLOWCASE_OP(op_get_arguments_length)

         DEFINE_SLOWCASE_OP(op_get_by_val)
         DEFINE_SLOWCASE_OP(op_get_by_val)

+        DEFINE_SLOWCASE_OP(op_get_argument_by_val)
+        DEFINE_SLOWCASE_OP(op_get_by_pname)
+        DEFINE_SLOWCASE_OP(op_check_has_instance)

         DEFINE_SLOWCASE_OP(op_instanceof)
         DEFINE_SLOWCASE_OP(op_jfalse)
         DEFINE_SLOWCASE_OP(op_instanceof)
         DEFINE_SLOWCASE_OP(op_jfalse)

+        DEFINE_SLOWCASE_OP(op_jless)
+        DEFINE_SLOWCASE_OP(op_jlesseq)
+        DEFINE_SLOWCASE_OP(op_jgreater)
+        DEFINE_SLOWCASE_OP(op_jgreatereq)

         DEFINE_SLOWCASE_OP(op_jnless)
         DEFINE_SLOWCASE_OP(op_jnlesseq)
         DEFINE_SLOWCASE_OP(op_jnless)
         DEFINE_SLOWCASE_OP(op_jnlesseq)

+        DEFINE_SLOWCASE_OP(op_jngreater)
+        DEFINE_SLOWCASE_OP(op_jngreatereq)

         DEFINE_SLOWCASE_OP(op_jtrue)
         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_loop_hint)

         DEFINE_SLOWCASE_OP(op_lshift)
         DEFINE_SLOWCASE_OP(op_lshift)

-        DEFINE_SLOWCASE_OP(op_method_check)

         DEFINE_SLOWCASE_OP(op_mod)
         DEFINE_SLOWCASE_OP(op_mul)
         DEFINE_SLOWCASE_OP(op_mod)
         DEFINE_SLOWCASE_OP(op_mul)

-#if USE(JSVALUE32_64)

         DEFINE_SLOWCASE_OP(op_negate)
         DEFINE_SLOWCASE_OP(op_negate)

-#endif

         DEFINE_SLOWCASE_OP(op_neq)
         DEFINE_SLOWCASE_OP(op_neq)

+        DEFINE_SLOWCASE_OP(op_new_object)

         DEFINE_SLOWCASE_OP(op_not)
         DEFINE_SLOWCASE_OP(op_nstricteq)
         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_dec)
+        DEFINE_SLOWCASE_OP(op_inc)
+        case op_put_by_id_out_of_line:
+        case op_put_by_id_transition_direct:
+        case op_put_by_id_transition_normal:
+        case op_put_by_id_transition_direct_out_of_line:
+        case op_put_by_id_transition_normal_out_of_line:

         DEFINE_SLOWCASE_OP(op_put_by_id)
         DEFINE_SLOWCASE_OP(op_put_by_val)
         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_init_global_const_check);

         DEFINE_SLOWCASE_OP(op_rshift)
         DEFINE_SLOWCASE_OP(op_rshift)

+        DEFINE_SLOWCASE_OP(op_urshift)

         DEFINE_SLOWCASE_OP(op_stricteq)
         DEFINE_SLOWCASE_OP(op_sub)
         DEFINE_SLOWCASE_OP(op_stricteq)
         DEFINE_SLOWCASE_OP(op_sub)

-        DEFINE_SLOWCASE_OP(op_to_jsnumber)
+        DEFINE_SLOWCASE_OP(op_to_number)

         DEFINE_SLOWCASE_OP(op_to_primitive)
         DEFINE_SLOWCASE_OP(op_to_primitive)

+
+        case op_resolve_global_property:
+        case op_resolve_global_var:
+        case op_resolve_scoped_var:
+        case op_resolve_scoped_var_on_top_scope:
+        case op_resolve_scoped_var_with_top_scope_check:
+        DEFINE_SLOWCASE_OP(op_resolve)
+
+        case op_resolve_base_to_global:
+        case op_resolve_base_to_global_dynamic:
+        case op_resolve_base_to_scope:
+        case op_resolve_base_to_scope_with_top_scope_check:
+        DEFINE_SLOWCASE_OP(op_resolve_base)
+        DEFINE_SLOWCASE_OP(op_resolve_with_base)
+        DEFINE_SLOWCASE_OP(op_resolve_with_this)
+
+        case op_put_to_base_variable:
+        DEFINE_SLOWCASE_OP(op_put_to_base)
+

         default:
         default:

-            ASSERT_NOT_REACHED();
+            RELEASE_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.");
+        RELEASE_ASSERT_WITH_MESSAGE(iter == m_slowCases.end() || firstTo != iter->to, "Not enough jumps linked in slow case codegen.");
+        RELEASE_ASSERT_WITH_MESSAGE(firstTo == (iter - 1)->to, "Too many jumps linked in slow case codegen.");
+        
+#if ENABLE(VALUE_PROFILER)
+        if (shouldEmitProfiling())
+            add32(TrustedImm32(1), AbsoluteAddress(&rareCaseProfile->m_counter));
+#endif

 
         emitJumpSlowToHot(jump(), 0);
     }
 
 
         emitJumpSlowToHot(jump(), 0);
     }
 

-#if ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
-    ASSERT(m_propertyAccessInstructionIndex == m_codeBlock->numberOfStructureStubInfos());
+    RELEASE_ASSERT(m_propertyAccessInstructionIndex == m_propertyAccessCompilationInfo.size());
+    RELEASE_ASSERT(m_callLinkInfoIndex == m_callStructureStubCompilationInfo.size());
+#if ENABLE(VALUE_PROFILER)
+    RELEASE_ASSERT(numberOfValueProfiles == m_codeBlock->numberOfValueProfiles());

 #endif
 #endif

-    ASSERT(m_callLinkInfoIndex == m_codeBlock->numberOfCallLinkInfos());

 
 #ifndef NDEBUG
     // Reset this, in order to guard its use with ASSERTs.
 
 #ifndef NDEBUG
     // Reset this, in order to guard its use with ASSERTs.

-    m_bytecodeIndex = (unsigned)-1;
+    m_bytecodeOffset = (unsigned)-1;

 #endif
 }
 
 #endif
 }
 

-void JIT::privateCompile()
+ALWAYS_INLINE void PropertyStubCompilationInfo::copyToStubInfo(StructureStubInfo& info, LinkBuffer &linkBuffer)

 {
 {

+    ASSERT(bytecodeIndex != std::numeric_limits<unsigned>::max());
+    info.bytecodeIndex = bytecodeIndex;
+    info.callReturnLocation = linkBuffer.locationOf(callReturnLocation);
+    info.hotPathBegin = linkBuffer.locationOf(hotPathBegin);
+
+    switch (m_type) {
+    case GetById: {
+        CodeLocationLabel hotPathBeginLocation = linkBuffer.locationOf(hotPathBegin);
+        info.patch.baseline.u.get.structureToCompare = MacroAssembler::differenceBetweenCodePtr(hotPathBeginLocation, linkBuffer.locationOf(getStructureToCompare));
+        info.patch.baseline.u.get.structureCheck = MacroAssembler::differenceBetweenCodePtr(hotPathBeginLocation, linkBuffer.locationOf(getStructureCheck));
+        info.patch.baseline.u.get.propertyStorageLoad = MacroAssembler::differenceBetweenCodePtr(hotPathBeginLocation, linkBuffer.locationOf(propertyStorageLoad));
+#if USE(JSVALUE64)
+        info.patch.baseline.u.get.displacementLabel = MacroAssembler::differenceBetweenCodePtr(hotPathBeginLocation, linkBuffer.locationOf(getDisplacementLabel));
+#else
+        info.patch.baseline.u.get.displacementLabel1 = MacroAssembler::differenceBetweenCodePtr(hotPathBeginLocation, linkBuffer.locationOf(getDisplacementLabel1));
+        info.patch.baseline.u.get.displacementLabel2 = MacroAssembler::differenceBetweenCodePtr(hotPathBeginLocation, linkBuffer.locationOf(getDisplacementLabel2));
+#endif
+        info.patch.baseline.u.get.putResult = MacroAssembler::differenceBetweenCodePtr(hotPathBeginLocation, linkBuffer.locationOf(getPutResult));
+        info.patch.baseline.u.get.coldPathBegin = MacroAssembler::differenceBetweenCodePtr(linkBuffer.locationOf(getColdPathBegin), linkBuffer.locationOf(callReturnLocation));
+        break;
+    }
+    case PutById:
+        CodeLocationLabel hotPathBeginLocation = linkBuffer.locationOf(hotPathBegin);
+        info.patch.baseline.u.put.structureToCompare = MacroAssembler::differenceBetweenCodePtr(hotPathBeginLocation, linkBuffer.locationOf(putStructureToCompare));
+        info.patch.baseline.u.put.propertyStorageLoad = MacroAssembler::differenceBetweenCodePtr(hotPathBeginLocation, linkBuffer.locationOf(propertyStorageLoad));
+#if USE(JSVALUE64)
+        info.patch.baseline.u.put.displacementLabel = MacroAssembler::differenceBetweenCodePtr(hotPathBeginLocation, linkBuffer.locationOf(putDisplacementLabel));
+#else
+        info.patch.baseline.u.put.displacementLabel1 = MacroAssembler::differenceBetweenCodePtr(hotPathBeginLocation, linkBuffer.locationOf(putDisplacementLabel1));
+        info.patch.baseline.u.put.displacementLabel2 = MacroAssembler::differenceBetweenCodePtr(hotPathBeginLocation, linkBuffer.locationOf(putDisplacementLabel2));
+#endif
+        break;
+    }
+}
+
+JITCode JIT::privateCompile(CodePtr* functionEntryArityCheck, JITCompilationEffort effort)
+{
+#if ENABLE(JIT_VERBOSE_OSR)
+    printf("Compiling JIT code!\n");
+#endif
+    
+#if ENABLE(VALUE_PROFILER)
+    DFG::CapabilityLevel level = m_codeBlock->canCompileWithDFG();
+    switch (level) {
+    case DFG::CannotCompile:
+        m_canBeOptimized = false;
+        m_shouldEmitProfiling = false;
+        break;
+    case DFG::MayInline:
+        m_canBeOptimized = false;
+        m_canBeOptimizedOrInlined = true;
+        m_shouldEmitProfiling = true;
+        break;
+    case DFG::CanCompile:
+        m_canBeOptimized = true;
+        m_canBeOptimizedOrInlined = true;
+        m_shouldEmitProfiling = true;
+        break;
+    default:
+        RELEASE_ASSERT_NOT_REACHED();
+        break;
+    }
+#endif
+    
+    if (Options::showDisassembly() || m_vm->m_perBytecodeProfiler)
+        m_disassembler = adoptPtr(new JITDisassembler(m_codeBlock));
+    if (m_vm->m_perBytecodeProfiler) {
+        m_compilation = m_vm->m_perBytecodeProfiler->newCompilation(m_codeBlock, Profiler::Baseline);
+        m_compilation->addProfiledBytecodes(*m_vm->m_perBytecodeProfiler, m_codeBlock);
+    }
+    
+    if (m_disassembler)
+        m_disassembler->setStartOfCode(label());
+
+    // Just add a little bit of randomness to the codegen
+    if (m_randomGenerator.getUint32() & 1)
+        nop();
+
+    preserveReturnAddressAfterCall(regT2);
+    emitPutToCallFrameHeader(regT2, JSStack::ReturnPC);
+    emitPutImmediateToCallFrameHeader(m_codeBlock, JSStack::CodeBlock);
+
+    Label beginLabel(this);
+

     sampleCodeBlock(m_codeBlock);
 #if ENABLE(OPCODE_SAMPLING)
     sampleInstruction(m_codeBlock->instructions().begin());
 #endif
 
     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;
+    Jump stackCheck;

     if (m_codeBlock->codeType() == FunctionCode) {
     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);
+#if ENABLE(DFG_JIT)
+#if DFG_ENABLE(SUCCESS_STATS)
+        static SamplingCounter counter("orignalJIT");
+        emitCount(counter);
+#endif
+#endif

 
 

-        peek(regT0, OBJECT_OFFSETOF(JITStackFrame, registerFile) / sizeof (void*));
-        addPtr(Imm32(m_codeBlock->m_numCalleeRegisters * sizeof(Register)), callFrameRegister, regT1);
+#if ENABLE(VALUE_PROFILER)
+        ASSERT(m_bytecodeOffset == (unsigned)-1);
+        if (shouldEmitProfiling()) {
+            for (int argument = 0; argument < m_codeBlock->numParameters(); ++argument) {
+                // If this is a constructor, then we want to put in a dummy profiling site (to
+                // keep things consistent) but we don't actually want to record the dummy value.
+                if (m_codeBlock->m_isConstructor && !argument)
+                    continue;
+                int offset = CallFrame::argumentOffsetIncludingThis(argument) * static_cast<int>(sizeof(Register));
+#if USE(JSVALUE64)
+                load64(Address(callFrameRegister, offset), regT0);
+#elif USE(JSVALUE32_64)
+                load32(Address(callFrameRegister, offset + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT0);
+                load32(Address(callFrameRegister, offset + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), regT1);
+#endif
+                emitValueProfilingSite(m_codeBlock->valueProfileForArgument(argument));
+            }
+        }
+#endif

 
 

-        slowRegisterFileCheck = branchPtr(Above, regT1, Address(regT0, OBJECT_OFFSETOF(RegisterFile, m_end)));
-        afterRegisterFileCheck = label();
+        addPtr(TrustedImm32(m_codeBlock->m_numCalleeRegisters * sizeof(Register)), callFrameRegister, regT1);
+        stackCheck = branchPtr(Below, AbsoluteAddress(m_vm->interpreter->stack().addressOfEnd()), regT1);

     }
 
     }
 

+    Label functionBody = label();
+    

     privateCompileMainPass();
     privateCompileLinkPass();
     privateCompileSlowCases();
     privateCompileMainPass();
     privateCompileLinkPass();
     privateCompileSlowCases();

+    
+    if (m_disassembler)
+        m_disassembler->setEndOfSlowPath(label());

 
 

+    Label arityCheck;

     if (m_codeBlock->codeType() == FunctionCode) {
     if (m_codeBlock->codeType() == FunctionCode) {

-        slowRegisterFileCheck.link(this);
-        m_bytecodeIndex = 0;
-        JITStubCall(this, cti_register_file_check).call();
+        stackCheck.link(this);
+        m_bytecodeOffset = 0;
+        JITStubCall(this, cti_stack_check).call();

 #ifndef NDEBUG
 #ifndef NDEBUG

-        m_bytecodeIndex = (unsigned)-1; // Reset this, in order to guard its use with ASSERTs.
+        m_bytecodeOffset = (unsigned)-1; // Reset this, in order to guard its use with ASSERTs.

 #endif
 #endif

-        jump(afterRegisterFileCheck);
+        jump(functionBody);
+
+        arityCheck = label();
+        preserveReturnAddressAfterCall(regT2);
+        emitPutToCallFrameHeader(regT2, JSStack::ReturnPC);
+        emitPutImmediateToCallFrameHeader(m_codeBlock, JSStack::CodeBlock);
+
+        load32(payloadFor(JSStack::ArgumentCount), regT1);
+        branch32(AboveOrEqual, regT1, TrustedImm32(m_codeBlock->m_numParameters)).linkTo(beginLabel, this);
+
+        m_bytecodeOffset = 0;
+        JITStubCall(this, m_codeBlock->m_isConstructor ? cti_op_construct_arityCheck : cti_op_call_arityCheck).call(callFrameRegister);
+#if !ASSERT_DISABLED
+        m_bytecodeOffset = (unsigned)-1; // Reset this, in order to guard its use with ASSERTs.
+#endif
+
+        jump(beginLabel);

     }
 
     ASSERT(m_jmpTable.isEmpty());
     }
 
     ASSERT(m_jmpTable.isEmpty());

+    
+    if (m_disassembler)
+        m_disassembler->setEndOfCode(label());

 
 

-    LinkBuffer patchBuffer(this, m_globalData->executableAllocator.poolForSize(m_assembler.size()));
+    LinkBuffer patchBuffer(*m_vm, this, m_codeBlock, effort);
+    if (patchBuffer.didFailToAllocate())
+        return JITCode();

 
     // 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];
 
     // 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;
+        unsigned bytecodeOffset = record.bytecodeOffset;

 
         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());
 
 
         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 + 3 + record.defaultOffset]);
+            record.jumpTable.simpleJumpTable->ctiDefault = patchBuffer.locationOf(m_labels[bytecodeOffset + record.defaultOffset]);

 
             for (unsigned j = 0; j < record.jumpTable.simpleJumpTable->branchOffsets.size(); ++j) {
                 unsigned offset = record.jumpTable.simpleJumpTable->branchOffsets[j];
 
             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 + 3 + offset]) : record.jumpTable.simpleJumpTable->ctiDefault;
+                record.jumpTable.simpleJumpTable->ctiOffsets[j] = offset ? patchBuffer.locationOf(m_labels[bytecodeOffset + offset]) : record.jumpTable.simpleJumpTable->ctiDefault;

             }
         } else {
             ASSERT(record.type == SwitchRecord::String);
 
             }
         } else {
             ASSERT(record.type == SwitchRecord::String);
 

-            record.jumpTable.stringJumpTable->ctiDefault = patchBuffer.locationOf(m_labels[bytecodeIndex + 3 + record.defaultOffset]);
+            record.jumpTable.stringJumpTable->ctiDefault = patchBuffer.locationOf(m_labels[bytecodeOffset + record.defaultOffset]);

 
             StringJumpTable::StringOffsetTable::iterator end = record.jumpTable.stringJumpTable->offsetTable.end();            
             for (StringJumpTable::StringOffsetTable::iterator it = record.jumpTable.stringJumpTable->offsetTable.begin(); it != end; ++it) {
 
             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 + 3 + offset]) : record.jumpTable.stringJumpTable->ctiDefault;
+                unsigned offset = it->value.branchOffset;
+                it->value.ctiOffset = offset ? patchBuffer.locationOf(m_labels[bytecodeOffset + offset]) : record.jumpTable.stringJumpTable->ctiDefault;

             }
         }
     }
             }
         }
     }


@@ -518,94 +732,111 @@ void JIT::privateCompile()
             patchBuffer.link(iter->from, FunctionPtr(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));
+    m_codeBlock->callReturnIndexVector().reserveCapacity(m_calls.size());
+    for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter)
+        m_codeBlock->callReturnIndexVector().append(CallReturnOffsetToBytecodeOffset(patchBuffer.returnAddressOffset(iter->from), iter->bytecodeOffset));
+
+    m_codeBlock->setNumberOfStructureStubInfos(m_propertyAccessCompilationInfo.size());
+    for (unsigned i = 0; i < m_propertyAccessCompilationInfo.size(); ++i)
+        m_propertyAccessCompilationInfo[i].copyToStubInfo(m_codeBlock->structureStubInfo(i), patchBuffer);
+    m_codeBlock->setNumberOfByValInfos(m_byValCompilationInfo.size());
+    for (unsigned i = 0; i < m_byValCompilationInfo.size(); ++i) {
+        CodeLocationJump badTypeJump = CodeLocationJump(patchBuffer.locationOf(m_byValCompilationInfo[i].badTypeJump));
+        CodeLocationLabel doneTarget = patchBuffer.locationOf(m_byValCompilationInfo[i].doneTarget);
+        CodeLocationLabel slowPathTarget = patchBuffer.locationOf(m_byValCompilationInfo[i].slowPathTarget);
+        CodeLocationCall returnAddress = patchBuffer.locationOf(m_byValCompilationInfo[i].returnAddress);
+        
+        m_codeBlock->byValInfo(i) = ByValInfo(
+            m_byValCompilationInfo[i].bytecodeIndex,
+            badTypeJump,
+            m_byValCompilationInfo[i].arrayMode,
+            differenceBetweenCodePtr(badTypeJump, doneTarget),
+            differenceBetweenCodePtr(returnAddress, slowPathTarget));

     }
     }

-
-    // 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)
+    m_codeBlock->setNumberOfCallLinkInfos(m_callStructureStubCompilationInfo.size());

     for (unsigned i = 0; i < m_codeBlock->numberOfCallLinkInfos(); ++i) {
         CallLinkInfo& info = m_codeBlock->callLinkInfo(i);
     for (unsigned i = 0; i < m_codeBlock->numberOfCallLinkInfos(); ++i) {
         CallLinkInfo& info = m_codeBlock->callLinkInfo(i);

-        info.ownerCodeBlock = m_codeBlock;
+        info.callType = m_callStructureStubCompilationInfo[i].callType;
+        info.codeOrigin = CodeOrigin(m_callStructureStubCompilationInfo[i].bytecodeIndex);

         info.callReturnLocation = patchBuffer.locationOfNearCall(m_callStructureStubCompilationInfo[i].callReturnLocation);
         info.hotPathBegin = patchBuffer.locationOf(m_callStructureStubCompilationInfo[i].hotPathBegin);
         info.hotPathOther = patchBuffer.locationOfNearCall(m_callStructureStubCompilationInfo[i].hotPathOther);
         info.callReturnLocation = patchBuffer.locationOfNearCall(m_callStructureStubCompilationInfo[i].callReturnLocation);
         info.hotPathBegin = patchBuffer.locationOf(m_callStructureStubCompilationInfo[i].hotPathBegin);
         info.hotPathOther = patchBuffer.locationOfNearCall(m_callStructureStubCompilationInfo[i].hotPathOther);

+        info.calleeGPR = regT0;

     }
     }

+
+#if ENABLE(DFG_JIT) || ENABLE(LLINT)
+    if (canBeOptimizedOrInlined()
+#if ENABLE(LLINT)
+        || true

 #endif
 #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;
+        ) {
+        CompactJITCodeMap::Encoder jitCodeMapEncoder;
+        for (unsigned bytecodeOffset = 0; bytecodeOffset < m_labels.size(); ++bytecodeOffset) {
+            if (m_labels[bytecodeOffset].isSet())
+                jitCodeMapEncoder.append(bytecodeOffset, patchBuffer.offsetOf(m_labels[bytecodeOffset]));
+        }
+        m_codeBlock->setJITCodeMap(jitCodeMapEncoder.finish());

     }
     }

+#endif

 
 

-    m_codeBlock->setJITCode(patchBuffer.finalizeCode());
-}
+    if (m_codeBlock->codeType() == FunctionCode && functionEntryArityCheck)
+        *functionEntryArityCheck = patchBuffer.locationOf(arityCheck);

 
 

-#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);
+    if (Options::showDisassembly())
+        m_disassembler->dump(patchBuffer);
+    if (m_compilation)
+        m_disassembler->reportToProfiler(m_compilation.get(), patchBuffer);
+    
+    CodeRef result = patchBuffer.finalizeCodeWithoutDisassembly();
+    
+    m_vm->machineCodeBytesPerBytecodeWordForBaselineJIT.add(
+        static_cast<double>(result.size()) /
+        static_cast<double>(m_codeBlock->instructions().size()));
+    
+    m_codeBlock->shrinkToFit(CodeBlock::LateShrink);
+    
+#if ENABLE(JIT_VERBOSE)
+    dataLogF("JIT generated code for %p at [%p, %p).\n", m_codeBlock, result.executableMemory()->start(), result.executableMemory()->end());
+#endif
+    
+    return JITCode(result, JITCode::BaselineJIT);

 }
 
 }
 

-void JIT::emitPutVariableObjectRegister(RegisterID src, RegisterID variableObject, int index)
+void JIT::linkFor(JSFunction* callee, CodeBlock* callerCodeBlock, CodeBlock* calleeCodeBlock, JIT::CodePtr code, CallLinkInfo* callLinkInfo, VM* vm, CodeSpecializationKind kind)

 {
 {

-    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
+    RepatchBuffer repatchBuffer(callerCodeBlock);

 
 

-#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);
-#if USE(JSVALUE32_64)
-    repatchBuffer.repatch(callLinkInfo->hotPathBegin, 0);
-#else
-    repatchBuffer.repatch(callLinkInfo->hotPathBegin, JSValue::encode(JSValue()));
-#endif
+    ASSERT(!callLinkInfo->isLinked());
+    callLinkInfo->callee.set(*vm, callLinkInfo->hotPathBegin, callerCodeBlock->ownerExecutable(), callee);
+    callLinkInfo->lastSeenCallee.set(*vm, callerCodeBlock->ownerExecutable(), callee);
+    repatchBuffer.relink(callLinkInfo->hotPathOther, code);
+
+    if (calleeCodeBlock)
+        calleeCodeBlock->linkIncomingCall(callLinkInfo);
+
+    // Patch the slow patch so we do not continue to try to link.
+    if (kind == CodeForCall) {
+        ASSERT(callLinkInfo->callType == CallLinkInfo::Call
+               || callLinkInfo->callType == CallLinkInfo::CallVarargs);
+        if (callLinkInfo->callType == CallLinkInfo::Call) {
+            repatchBuffer.relink(callLinkInfo->callReturnLocation, vm->getCTIStub(linkClosureCallGenerator).code());
+            return;
+        }
+
+        repatchBuffer.relink(callLinkInfo->callReturnLocation, vm->getCTIStub(virtualCallGenerator).code());
+        return;
+    }
+
+    ASSERT(kind == CodeForConstruct);
+    repatchBuffer.relink(callLinkInfo->callReturnLocation, vm->getCTIStub(virtualConstructGenerator).code());

 }
 
 }
 

-void JIT::linkCall(JSFunction* callee, CodeBlock* callerCodeBlock, CodeBlock* calleeCodeBlock, JITCode& code, CallLinkInfo* callLinkInfo, int callerArgCount, JSGlobalData* globalData)
+void JIT::linkSlowCall(CodeBlock* callerCodeBlock, CallLinkInfo* callLinkInfo)

 {
 {

-    ASSERT(calleeCodeBlock);

     RepatchBuffer repatchBuffer(callerCodeBlock);
 
     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 (callerArgCount == calleeCodeBlock->m_numParameters || calleeCodeBlock->codeType() == NativeCode) {
-        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());
+    repatchBuffer.relink(callLinkInfo->callReturnLocation, callerCodeBlock->vm()->getCTIStub(virtualCallGenerator).code());

 }
 }

-#endif // ENABLE(JIT_OPTIMIZE_CALL)

 
 } // namespace JSC
 
 
 } // namespace JSC