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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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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1787 } | 1787 } |
1788 | 1788 |
1789 return object; | 1789 return object; |
1790 } | 1790 } |
1791 | 1791 |
1792 | 1792 |
1793 HValue* HGraphBuilder::BuildAddStringLengths(HValue* left_length, | 1793 HValue* HGraphBuilder::BuildAddStringLengths(HValue* left_length, |
1794 HValue* right_length) { | 1794 HValue* right_length) { |
1795 // Compute the combined string length and check against max string length. | 1795 // Compute the combined string length and check against max string length. |
1796 HValue* length = AddUncasted<HAdd>(left_length, right_length); | 1796 HValue* length = AddUncasted<HAdd>(left_length, right_length); |
1797 HValue* max_length = Add<HConstant>(String::kMaxLength); | 1797 // Check that length <= kMaxLength <=> length < MaxLength + 1. |
| 1798 HValue* max_length = Add<HConstant>(String::kMaxLength + 1); |
1798 Add<HBoundsCheck>(length, max_length); | 1799 Add<HBoundsCheck>(length, max_length); |
1799 return length; | 1800 return length; |
1800 } | 1801 } |
1801 | 1802 |
1802 | 1803 |
1803 HValue* HGraphBuilder::BuildCreateConsString( | 1804 HValue* HGraphBuilder::BuildCreateConsString( |
1804 HValue* length, | 1805 HValue* length, |
1805 HValue* left, | 1806 HValue* left, |
1806 HValue* right, | 1807 HValue* right, |
1807 HAllocationMode allocation_mode) { | 1808 HAllocationMode allocation_mode) { |
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11500 if (ShouldProduceTraceOutput()) { | 11501 if (ShouldProduceTraceOutput()) { |
11501 isolate()->GetHTracer()->TraceHydrogen(name(), graph_); | 11502 isolate()->GetHTracer()->TraceHydrogen(name(), graph_); |
11502 } | 11503 } |
11503 | 11504 |
11504 #ifdef DEBUG | 11505 #ifdef DEBUG |
11505 graph_->Verify(false); // No full verify. | 11506 graph_->Verify(false); // No full verify. |
11506 #endif | 11507 #endif |
11507 } | 11508 } |
11508 | 11509 |
11509 } } // namespace v8::internal | 11510 } } // namespace v8::internal |
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