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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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342 EmitProfilingCounterDecrement(weight); | 342 EmitProfilingCounterDecrement(weight); |
343 __ j(positive, &ok, Label::kNear); | 343 __ j(positive, &ok, Label::kNear); |
344 InterruptStub stub; | 344 InterruptStub stub; |
345 __ CallStub(&stub); | 345 __ CallStub(&stub); |
346 | 346 |
347 // Record a mapping of this PC offset to the OSR id. This is used to find | 347 // Record a mapping of this PC offset to the OSR id. This is used to find |
348 // the AST id from the unoptimized code in order to use it as a key into | 348 // the AST id from the unoptimized code in order to use it as a key into |
349 // the deoptimization input data found in the optimized code. | 349 // the deoptimization input data found in the optimized code. |
350 RecordBackEdge(stmt->OsrEntryId()); | 350 RecordBackEdge(stmt->OsrEntryId()); |
351 | 351 |
352 // Loop stack checks can be patched to perform on-stack replacement. In | |
353 // order to decide whether or not to perform OSR we embed the loop depth | |
354 // in a test instruction after the call so we can extract it from the OSR | |
355 // builtin. | |
356 ASSERT(loop_depth() > 0); | |
357 __ testl(rax, Immediate(Min(loop_depth(), Code::kMaxLoopNestingMarker))); | |
358 | |
359 EmitProfilingCounterReset(); | 352 EmitProfilingCounterReset(); |
360 | 353 |
361 __ bind(&ok); | 354 __ bind(&ok); |
362 PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS); | 355 PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS); |
363 // Record a mapping of the OSR id to this PC. This is used if the OSR | 356 // Record a mapping of the OSR id to this PC. This is used if the OSR |
364 // entry becomes the target of a bailout. We don't expect it to be, but | 357 // entry becomes the target of a bailout. We don't expect it to be, but |
365 // we want it to work if it is. | 358 // we want it to work if it is. |
366 PrepareForBailoutForId(stmt->OsrEntryId(), NO_REGISTERS); | 359 PrepareForBailoutForId(stmt->OsrEntryId(), NO_REGISTERS); |
367 } | 360 } |
368 | 361 |
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4566 *context_length = 0; | 4559 *context_length = 0; |
4567 return previous_; | 4560 return previous_; |
4568 } | 4561 } |
4569 | 4562 |
4570 | 4563 |
4571 #undef __ | 4564 #undef __ |
4572 | 4565 |
4573 } } // namespace v8::internal | 4566 } } // namespace v8::internal |
4574 | 4567 |
4575 #endif // V8_TARGET_ARCH_X64 | 4568 #endif // V8_TARGET_ARCH_X64 |
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