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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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1278 // A change from an integer32 can be replaced by the integer32 value. | 1278 // A change from an integer32 can be replaced by the integer32 value. |
1279 if (dividend->IsChange() && | 1279 if (dividend->IsChange() && |
1280 HChange::cast(dividend)->from().IsInteger32()) { | 1280 HChange::cast(dividend)->from().IsInteger32()) { |
1281 return HChange::cast(dividend)->value(); | 1281 return HChange::cast(dividend)->value(); |
1282 } | 1282 } |
1283 return NULL; | 1283 return NULL; |
1284 } | 1284 } |
1285 | 1285 |
1286 | 1286 |
1287 HValue* HUnaryMathOperation::Canonicalize() { | 1287 HValue* HUnaryMathOperation::Canonicalize() { |
| 1288 if (op() == kMathRound) { |
| 1289 HValue* val = value(); |
| 1290 if (val->IsChange()) val = HChange::cast(val)->value(); |
| 1291 |
| 1292 // If the input is integer32 then we replace the round instruction |
| 1293 // with its input. |
| 1294 if (val->representation().IsSmiOrInteger32()) return val; |
| 1295 } |
| 1296 |
1288 if (op() == kMathFloor) { | 1297 if (op() == kMathFloor) { |
1289 HValue* val = value(); | 1298 HValue* val = value(); |
1290 if (val->IsChange()) val = HChange::cast(val)->value(); | 1299 if (val->IsChange()) val = HChange::cast(val)->value(); |
1291 | 1300 |
1292 // If the input is integer32 then we replace the floor instruction | 1301 // If the input is integer32 then we replace the floor instruction |
1293 // with its input. | 1302 // with its input. |
1294 if (val->representation().IsSmiOrInteger32()) return val; | 1303 if (val->representation().IsSmiOrInteger32()) return val; |
1295 | 1304 |
1296 if (val->IsDiv() && (val->UseCount() == 1)) { | 1305 if (val->IsDiv() && (val->UseCount() == 1)) { |
1297 HDiv* hdiv = HDiv::cast(val); | 1306 HDiv* hdiv = HDiv::cast(val); |
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3306 if (from().IsDouble() && to().IsTagged()) return HType::HeapNumber(); | 3315 if (from().IsDouble() && to().IsTagged()) return HType::HeapNumber(); |
3307 return type(); | 3316 return type(); |
3308 } | 3317 } |
3309 | 3318 |
3310 | 3319 |
3311 Representation HUnaryMathOperation::RepresentationFromInputs() { | 3320 Representation HUnaryMathOperation::RepresentationFromInputs() { |
3312 Representation rep = representation(); | 3321 Representation rep = representation(); |
3313 // If any of the actual input representation is more general than what we | 3322 // If any of the actual input representation is more general than what we |
3314 // have so far but not Tagged, use that representation instead. | 3323 // have so far but not Tagged, use that representation instead. |
3315 Representation input_rep = value()->representation(); | 3324 Representation input_rep = value()->representation(); |
3316 if (!input_rep.IsTagged()) rep = rep.generalize(input_rep); | 3325 if (!input_rep.IsTagged()) { |
| 3326 rep = rep.generalize(input_rep); |
| 3327 } else if (flexible_int()) { |
| 3328 rep = Representation::Integer32(); |
| 3329 } |
3317 return rep; | 3330 return rep; |
3318 } | 3331 } |
3319 | 3332 |
3320 | 3333 |
3321 void HAllocate::HandleSideEffectDominator(GVNFlag side_effect, | 3334 void HAllocate::HandleSideEffectDominator(GVNFlag side_effect, |
3322 HValue* dominator) { | 3335 HValue* dominator) { |
3323 ASSERT(side_effect == kChangesNewSpacePromotion); | 3336 ASSERT(side_effect == kChangesNewSpacePromotion); |
3324 if (!FLAG_use_allocation_folding) return; | 3337 if (!FLAG_use_allocation_folding) return; |
3325 | 3338 |
3326 // Try to fold allocations together with their dominating allocations. | 3339 // Try to fold allocations together with their dominating allocations. |
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4135 break; | 4148 break; |
4136 case kExternalMemory: | 4149 case kExternalMemory: |
4137 stream->Add("[external-memory]"); | 4150 stream->Add("[external-memory]"); |
4138 break; | 4151 break; |
4139 } | 4152 } |
4140 | 4153 |
4141 stream->Add("@%d", offset()); | 4154 stream->Add("@%d", offset()); |
4142 } | 4155 } |
4143 | 4156 |
4144 } } // namespace v8::internal | 4157 } } // namespace v8::internal |
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