dfg/DFGOperations.h

   1 /*
   2  * Copyright (C) 2011 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef DFGOperations_h
  27 #define DFGOperations_h
  28
  29 #if ENABLE(DFG_JIT)
  30
  31 #include "DFGJITCompiler.h"
  32 #include "PutKind.h"
  33
  34 namespace JSC {
  35
  36 namespace DFG {
  37
  38 extern "C" {
  39
  40 #if CALLING_CONVENTION_IS_STDCALL
  41 #define DFG_OPERATION CDECL
  42 #else
  43 #define DFG_OPERATION
  44 #endif
  45
  46 // These typedefs provide typechecking when generating calls out to helper routines;
  47 // this helps prevent calling a helper routine with the wrong arguments!
  48 /*
  49     Key:
  50     V: void
  51     J: JSValue
  52     P: pointer (void*)
  53     C: JSCell*
  54     A: JSArray*
  55     S: size_t
  56     Z: int32_t
  57     D: double
  58     I: Identifier*
  59     G: GlobalResolveInfo*
  60 */
  61 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_E)(ExecState*);
  62 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EA)(ExecState*, JSArray*);
  63 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EAZ)(ExecState*, JSArray*, int32_t);
  64 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EC)(ExecState*, JSCell*);
  65 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_ECC)(ExecState*, JSCell*, JSCell*);
  66 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_ECI)(ExecState*, JSCell*, Identifier*);
  67 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_ECJ)(ExecState*, JSCell*, EncodedJSValue);
  68 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EDA)(ExecState*, double, JSArray*);
  69 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EGriJsgI)(ExecState*, ResolveOperation*, JSGlobalObject*, Identifier*);
  70 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EI)(ExecState*, Identifier*);
  71 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EIRo)(ExecState*, Identifier*, ResolveOperations*);
  72 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EIRoPtbo)(ExecState*, Identifier*, ResolveOperations*, PutToBaseOperation*);
  73 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EJ)(ExecState*, EncodedJSValue);
  74 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EJA)(ExecState*, EncodedJSValue, JSArray*);
  75 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EJI)(ExecState*, EncodedJSValue, Identifier*);
  76 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EJJ)(ExecState*, EncodedJSValue, EncodedJSValue);
  77 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EJP)(ExecState*, EncodedJSValue, void*);
  78 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EP)(ExecState*, void*);
  79 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EPP)(ExecState*, void*, void*);
  80 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EPS)(ExecState*, void*, size_t);
  81 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_ESS)(ExecState*, size_t, size_t);
  82 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EZ)(ExecState*, int32_t);
  83 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EZIcfZ)(ExecState*, int32_t, InlineCallFrame*, int32_t);
  84 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EZZ)(ExecState*, int32_t, int32_t);
  85 typedef JSCell* DFG_OPERATION (*C_DFGOperation_E)(ExecState*);
  86 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EZ)(ExecState*, int32_t);
  87 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EC)(ExecState*, JSCell*);
  88 typedef JSCell* DFG_OPERATION (*C_DFGOperation_ECC)(ExecState*, JSCell*, JSCell*);
  89 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EIcf)(ExecState*, InlineCallFrame*);
  90 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EJ)(ExecState*, EncodedJSValue);
  91 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EJssSt)(ExecState*, JSString*, Structure*);
  92 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EJssJss)(ExecState*, JSString*, JSString*);
  93 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EJssJssJss)(ExecState*, JSString*, JSString*, JSString*);
  94 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EOZ)(ExecState*, JSObject*, int32_t);
  95 typedef JSCell* DFG_OPERATION (*C_DFGOperation_ESt)(ExecState*, Structure*);
  96 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EZ)(ExecState*, int32_t);
  97 typedef double DFG_OPERATION (*D_DFGOperation_DD)(double, double);
  98 typedef double DFG_OPERATION (*D_DFGOperation_ZZ)(int32_t, int32_t);
  99 typedef double DFG_OPERATION (*D_DFGOperation_EJ)(ExecState*, EncodedJSValue);
 100 typedef int32_t DFG_OPERATION (*Z_DFGOperation_D)(double);
 101 typedef size_t DFG_OPERATION (*S_DFGOperation_ECC)(ExecState*, JSCell*, JSCell*);
 102 typedef size_t DFG_OPERATION (*S_DFGOperation_EJ)(ExecState*, EncodedJSValue);
 103 typedef size_t DFG_OPERATION (*S_DFGOperation_EJJ)(ExecState*, EncodedJSValue, EncodedJSValue);
 104 typedef size_t DFG_OPERATION (*S_DFGOperation_J)(EncodedJSValue);
 105 typedef void DFG_OPERATION (*V_DFGOperation_EOZD)(ExecState*, JSObject*, int32_t, double);
 106 typedef void DFG_OPERATION (*V_DFGOperation_EOZJ)(ExecState*, JSObject*, int32_t, EncodedJSValue);
 107 typedef void DFG_OPERATION (*V_DFGOperation_EC)(ExecState*, JSCell*);
 108 typedef void DFG_OPERATION (*V_DFGOperation_ECIcf)(ExecState*, JSCell*, InlineCallFrame*);
 109 typedef void DFG_OPERATION (*V_DFGOperation_ECCIcf)(ExecState*, JSCell*, JSCell*, InlineCallFrame*);
 110 typedef void DFG_OPERATION (*V_DFGOperation_ECJJ)(ExecState*, JSCell*, EncodedJSValue, EncodedJSValue);
 111 typedef void DFG_OPERATION (*V_DFGOperation_ECZ)(ExecState*, JSCell*, int32_t);
 112 typedef void DFG_OPERATION (*V_DFGOperation_ECC)(ExecState*, JSCell*, JSCell*);
 113 typedef void DFG_OPERATION (*V_DFGOperation_EJCI)(ExecState*, EncodedJSValue, JSCell*, Identifier*);
 114 typedef void DFG_OPERATION (*V_DFGOperation_EJJJ)(ExecState*, EncodedJSValue, EncodedJSValue, EncodedJSValue);
 115 typedef void DFG_OPERATION (*V_DFGOperation_EJPP)(ExecState*, EncodedJSValue, EncodedJSValue, void*);
 116 typedef void DFG_OPERATION (*V_DFGOperation_EPZJ)(ExecState*, void*, int32_t, EncodedJSValue);
 117 typedef void DFG_OPERATION (*V_DFGOperation_W)(WatchpointSet*);
 118 typedef char* DFG_OPERATION (*P_DFGOperation_E)(ExecState*);
 119 typedef char* DFG_OPERATION (*P_DFGOperation_EC)(ExecState*, JSCell*);
 120 typedef char* DFG_OPERATION (*P_DFGOperation_EO)(ExecState*, JSObject*);
 121 typedef char* DFG_OPERATION (*P_DFGOperation_EOS)(ExecState*, JSObject*, size_t);
 122 typedef char* DFG_OPERATION (*P_DFGOperation_EOZ)(ExecState*, JSObject*, int32_t);
 123 typedef char* DFG_OPERATION (*P_DFGOperation_EPS)(ExecState*, void*, size_t);
 124 typedef char* DFG_OPERATION (*P_DFGOperation_ES)(ExecState*, size_t);
 125 typedef char* DFG_OPERATION (*P_DFGOperation_ESt)(ExecState*, Structure*);
 126 typedef char* DFG_OPERATION (*P_DFGOperation_EStPS)(ExecState*, Structure*, void*, size_t);
 127 typedef char* DFG_OPERATION (*P_DFGOperation_EStSS)(ExecState*, Structure*, size_t, size_t);
 128 typedef char* DFG_OPERATION (*P_DFGOperation_EStZ)(ExecState*, Structure*, int32_t);
 129 typedef StringImpl* DFG_OPERATION (*Str_DFGOperation_EJss)(ExecState*, JSString*);
 130 JSCell* DFG_OPERATION operationStringFromCharCode(ExecState*, int32_t)  WTF_INTERNAL;
 131
 132 // These routines are provide callbacks out to C++ implementations of operations too complex to JIT.
 133 JSCell* DFG_OPERATION operationNewObject(ExecState*, Structure*) WTF_INTERNAL;
 134 JSCell* DFG_OPERATION operationCreateThis(ExecState*, JSObject* constructor, int32_t inlineCapacity) WTF_INTERNAL;
 135 EncodedJSValue DFG_OPERATION operationConvertThis(ExecState*, EncodedJSValue encodedOp1) WTF_INTERNAL;
 136 EncodedJSValue DFG_OPERATION operationValueAdd(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 137 EncodedJSValue DFG_OPERATION operationValueAddNotNumber(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 138 EncodedJSValue DFG_OPERATION operationGetByVal(ExecState*, EncodedJSValue encodedBase, EncodedJSValue encodedProperty) WTF_INTERNAL;
 139 EncodedJSValue DFG_OPERATION operationGetByValCell(ExecState*, JSCell*, EncodedJSValue encodedProperty) WTF_INTERNAL;
 140 EncodedJSValue DFG_OPERATION operationGetByValArrayInt(ExecState*, JSArray*, int32_t) WTF_INTERNAL;
 141 EncodedJSValue DFG_OPERATION operationGetById(ExecState*, EncodedJSValue, Identifier*) WTF_INTERNAL;
 142 EncodedJSValue DFG_OPERATION operationGetByIdBuildList(ExecState*, EncodedJSValue, Identifier*) WTF_INTERNAL;
 143 EncodedJSValue DFG_OPERATION operationGetByIdProtoBuildList(ExecState*, EncodedJSValue, Identifier*) WTF_INTERNAL;
 144 EncodedJSValue DFG_OPERATION operationGetByIdOptimize(ExecState*, EncodedJSValue, Identifier*) WTF_INTERNAL;
 145 EncodedJSValue DFG_OPERATION operationCallCustomGetter(ExecState*, JSCell*, PropertySlot::GetValueFunc, Identifier*) WTF_INTERNAL;
 146 EncodedJSValue DFG_OPERATION operationCallGetter(ExecState*, JSCell*, JSCell*) WTF_INTERNAL;
 147 void DFG_OPERATION operationNotifyGlobalVarWrite(WatchpointSet* watchpointSet) WTF_INTERNAL;
 148 EncodedJSValue DFG_OPERATION operationResolve(ExecState*, Identifier*, ResolveOperations*) WTF_INTERNAL;
 149 EncodedJSValue DFG_OPERATION operationResolveBase(ExecState*, Identifier*, ResolveOperations*, PutToBaseOperation*) WTF_INTERNAL;
 150 EncodedJSValue DFG_OPERATION operationResolveBaseStrictPut(ExecState*, Identifier*, ResolveOperations*, PutToBaseOperation*) WTF_INTERNAL;
 151 EncodedJSValue DFG_OPERATION operationResolveGlobal(ExecState*, ResolveOperation*, JSGlobalObject*, Identifier*) WTF_INTERNAL;
 152 EncodedJSValue DFG_OPERATION operationToPrimitive(ExecState*, EncodedJSValue) WTF_INTERNAL;
 153 char* DFG_OPERATION operationNewArray(ExecState*, Structure*, void*, size_t) WTF_INTERNAL;
 154 char* DFG_OPERATION operationNewArrayBuffer(ExecState*, Structure*, size_t, size_t) WTF_INTERNAL;
 155 char* DFG_OPERATION operationNewEmptyArray(ExecState*, Structure*) WTF_INTERNAL;
 156 char* DFG_OPERATION operationNewArrayWithSize(ExecState*, Structure*, int32_t) WTF_INTERNAL;
 157 EncodedJSValue DFG_OPERATION operationNewRegexp(ExecState*, void*) WTF_INTERNAL;
 158 void DFG_OPERATION operationPutByValStrict(ExecState*, EncodedJSValue encodedBase, EncodedJSValue encodedProperty, EncodedJSValue encodedValue) WTF_INTERNAL;
 159 void DFG_OPERATION operationPutByValNonStrict(ExecState*, EncodedJSValue encodedBase, EncodedJSValue encodedProperty, EncodedJSValue encodedValue) WTF_INTERNAL;
 160 void DFG_OPERATION operationPutByValCellStrict(ExecState*, JSCell*, EncodedJSValue encodedProperty, EncodedJSValue encodedValue) WTF_INTERNAL;
 161 void DFG_OPERATION operationPutByValCellNonStrict(ExecState*, JSCell*, EncodedJSValue encodedProperty, EncodedJSValue encodedValue) WTF_INTERNAL;
 162 void DFG_OPERATION operationPutByValBeyondArrayBoundsStrict(ExecState*, JSObject*, int32_t index, EncodedJSValue encodedValue) WTF_INTERNAL;
 163 void DFG_OPERATION operationPutByValBeyondArrayBoundsNonStrict(ExecState*, JSObject*, int32_t index, EncodedJSValue encodedValue) WTF_INTERNAL;
 164 void DFG_OPERATION operationPutDoubleByValBeyondArrayBoundsStrict(ExecState*, JSObject*, int32_t index, double value) WTF_INTERNAL;
 165 void DFG_OPERATION operationPutDoubleByValBeyondArrayBoundsNonStrict(ExecState*, JSObject*, int32_t index, double value) WTF_INTERNAL;
 166 EncodedJSValue DFG_OPERATION operationArrayPush(ExecState*, EncodedJSValue encodedValue, JSArray*) WTF_INTERNAL;
 167 EncodedJSValue DFG_OPERATION operationArrayPushDouble(ExecState*, double value, JSArray*) WTF_INTERNAL;
 168 EncodedJSValue DFG_OPERATION operationArrayPop(ExecState*, JSArray*) WTF_INTERNAL;
 169 EncodedJSValue DFG_OPERATION operationArrayPopAndRecoverLength(ExecState*, JSArray*) WTF_INTERNAL;
 170 EncodedJSValue DFG_OPERATION operationRegExpExec(ExecState*, JSCell*, JSCell*) WTF_INTERNAL;
 171 void DFG_OPERATION operationPutByIdStrict(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 172 void DFG_OPERATION operationPutByIdNonStrict(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 173 void DFG_OPERATION operationPutByIdDirectStrict(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 174 void DFG_OPERATION operationPutByIdDirectNonStrict(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 175 void DFG_OPERATION operationPutByIdStrictOptimize(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 176 void DFG_OPERATION operationPutByIdNonStrictOptimize(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 177 void DFG_OPERATION operationPutByIdDirectStrictOptimize(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 178 void DFG_OPERATION operationPutByIdDirectNonStrictOptimize(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 179 void DFG_OPERATION operationPutByIdStrictBuildList(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 180 void DFG_OPERATION operationPutByIdNonStrictBuildList(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 181 void DFG_OPERATION operationPutByIdDirectStrictBuildList(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 182 void DFG_OPERATION operationPutByIdDirectNonStrictBuildList(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 183 // These comparisons return a boolean within a size_t such that the value is zero extended to fill the register.
 184 size_t DFG_OPERATION operationRegExpTest(ExecState*, JSCell*, JSCell*) WTF_INTERNAL;
 185 size_t DFG_OPERATION operationCompareLess(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 186 size_t DFG_OPERATION operationCompareLessEq(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 187 size_t DFG_OPERATION operationCompareGreater(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 188 size_t DFG_OPERATION operationCompareGreaterEq(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 189 size_t DFG_OPERATION operationCompareEq(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 190 #if USE(JSVALUE64)
 191 EncodedJSValue DFG_OPERATION operationCompareStringEq(ExecState*, JSCell* left, JSCell* right) WTF_INTERNAL;
 192 #else
 193 size_t DFG_OPERATION operationCompareStringEq(ExecState*, JSCell* left, JSCell* right) WTF_INTERNAL;
 194 #endif
 195 size_t DFG_OPERATION operationCompareStrictEqCell(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 196 size_t DFG_OPERATION operationCompareStrictEq(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 197 char* DFG_OPERATION operationVirtualCall(ExecState*) WTF_INTERNAL;
 198 char* DFG_OPERATION operationLinkCall(ExecState*) WTF_INTERNAL;
 199 char* DFG_OPERATION operationLinkClosureCall(ExecState*) WTF_INTERNAL;
 200 char* DFG_OPERATION operationVirtualConstruct(ExecState*) WTF_INTERNAL;
 201 char* DFG_OPERATION operationLinkConstruct(ExecState*) WTF_INTERNAL;
 202 JSCell* DFG_OPERATION operationCreateActivation(ExecState*) WTF_INTERNAL;
 203 JSCell* DFG_OPERATION operationCreateArguments(ExecState*) WTF_INTERNAL;
 204 JSCell* DFG_OPERATION operationCreateInlinedArguments(ExecState*, InlineCallFrame*) WTF_INTERNAL;
 205 void DFG_OPERATION operationTearOffArguments(ExecState*, JSCell*, JSCell*) WTF_INTERNAL;
 206 void DFG_OPERATION operationTearOffInlinedArguments(ExecState*, JSCell*, JSCell*, InlineCallFrame*) WTF_INTERNAL;
 207 EncodedJSValue DFG_OPERATION operationGetArgumentsLength(ExecState*, int32_t) WTF_INTERNAL;
 208 EncodedJSValue DFG_OPERATION operationGetInlinedArgumentByVal(ExecState*, int32_t, InlineCallFrame*, int32_t) WTF_INTERNAL;
 209 EncodedJSValue DFG_OPERATION operationGetArgumentByVal(ExecState*, int32_t, int32_t) WTF_INTERNAL;
 210 JSCell* DFG_OPERATION operationNewFunctionNoCheck(ExecState*, JSCell*) WTF_INTERNAL;
 211 EncodedJSValue DFG_OPERATION operationNewFunction(ExecState*, JSCell*) WTF_INTERNAL;
 212 JSCell* DFG_OPERATION operationNewFunctionExpression(ExecState*, JSCell*) WTF_INTERNAL;
 213 double DFG_OPERATION operationFModOnInts(int32_t, int32_t) WTF_INTERNAL;
 214 size_t DFG_OPERATION operationIsObject(ExecState*, EncodedJSValue) WTF_INTERNAL;
 215 size_t DFG_OPERATION operationIsFunction(EncodedJSValue) WTF_INTERNAL;
 216 JSCell* DFG_OPERATION operationTypeOf(ExecState*, JSCell*) WTF_INTERNAL;
 217 void DFG_OPERATION operationReallocateStorageAndFinishPut(ExecState*, JSObject*, Structure*, PropertyOffset, EncodedJSValue) WTF_INTERNAL;
 218 char* DFG_OPERATION operationAllocatePropertyStorageWithInitialCapacity(ExecState*) WTF_INTERNAL;
 219 char* DFG_OPERATION operationAllocatePropertyStorage(ExecState*, size_t newSize) WTF_INTERNAL;
 220 char* DFG_OPERATION operationReallocateButterflyToHavePropertyStorageWithInitialCapacity(ExecState*, JSObject*) WTF_INTERNAL;
 221 char* DFG_OPERATION operationReallocateButterflyToGrowPropertyStorage(ExecState*, JSObject*, size_t newSize) WTF_INTERNAL;
 222 char* DFG_OPERATION operationEnsureInt32(ExecState*, JSCell*);
 223 char* DFG_OPERATION operationEnsureDouble(ExecState*, JSCell*);
 224 char* DFG_OPERATION operationEnsureContiguous(ExecState*, JSCell*);
 225 char* DFG_OPERATION operationRageEnsureContiguous(ExecState*, JSCell*);
 226 char* DFG_OPERATION operationEnsureArrayStorage(ExecState*, JSCell*);
 227 StringImpl* DFG_OPERATION operationResolveRope(ExecState*, JSString*);
 228 JSCell* DFG_OPERATION operationNewStringObject(ExecState*, JSString*, Structure*);
 229 JSCell* DFG_OPERATION operationToStringOnCell(ExecState*, JSCell*);
 230 JSCell* DFG_OPERATION operationToString(ExecState*, EncodedJSValue);
 231 JSCell* DFG_OPERATION operationMakeRope2(ExecState*, JSString*, JSString*);
 232 JSCell* DFG_OPERATION operationMakeRope3(ExecState*, JSString*, JSString*, JSString*);
 233
 234 // This method is used to lookup an exception hander, keyed by faultLocation, which is
 235 // the return location from one of the calls out to one of the helper operations above.
 236
 237 // According to C++ rules, a type used for the return signature of function with C linkage (i.e.
 238 // 'extern "C"') needs to be POD; hence putting any constructors into it could cause either compiler
 239 // warnings, or worse, a change in the ABI used to return these types.
 240 struct DFGHandler {
 241     union Union {
 242         struct Struct {
 243             ExecState* exec;
 244             void* handler;
 245         } s;
 246         uint64_t encoded;
 247     } u;
 248 };
 249
 250 inline DFGHandler createDFGHandler(ExecState* exec, void* handler)
 251 {
 252     DFGHandler result;
 253     result.u.s.exec = exec;
 254     result.u.s.handler = handler;
 255     return result;
 256 }
 257
 258 #if USE(JSVALUE64)
 259 typedef DFGHandler DFGHandlerEncoded;
 260 inline DFGHandlerEncoded dfgHandlerEncoded(ExecState* exec, void* handler)
 261 {
 262     return createDFGHandler(exec, handler);
 263 }
 264 #else
 265 typedef uint64_t DFGHandlerEncoded;
 266 inline DFGHandlerEncoded dfgHandlerEncoded(ExecState* exec, void* handler)
 267 {
 268     COMPILE_ASSERT(sizeof(DFGHandler::Union) == sizeof(uint64_t), DFGHandler_Union_is_64bit);
 269     return createDFGHandler(exec, handler).u.encoded;
 270 }
 271 #endif
 272 DFGHandlerEncoded DFG_OPERATION lookupExceptionHandler(ExecState*, uint32_t) WTF_INTERNAL;
 273 DFGHandlerEncoded DFG_OPERATION lookupExceptionHandlerInStub(ExecState*, StructureStubInfo*) WTF_INTERNAL;
 274
 275 // These operations implement the implicitly called ToInt32 and ToBoolean conversions from ES5.
 276 // This conversion returns an int32_t within a size_t such that the value is zero extended to fill the register.
 277 size_t DFG_OPERATION dfgConvertJSValueToInt32(ExecState*, EncodedJSValue) WTF_INTERNAL;
 278 size_t DFG_OPERATION dfgConvertJSValueToBoolean(ExecState*, EncodedJSValue) WTF_INTERNAL;
 279
 280 void DFG_OPERATION debugOperationPrintSpeculationFailure(ExecState*, void*, void*) WTF_INTERNAL;
 281
 282 void DFG_OPERATION triggerReoptimizationNow(CodeBlock*) WTF_INTERNAL;
 283
 284 } // extern "C"
 285 } } // namespace JSC::DFG
 286
 287 #endif
 288 #endif