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Issue 2392613002: Reapply "Lazy deopt without code patching." (Closed)
Patch Set: . Created 4 years, 2 months ago
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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_X64. 5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_X64.
6 #if defined(TARGET_ARCH_X64) 6 #if defined(TARGET_ARCH_X64)
7 7
8 #include "vm/intermediate_language.h" 8 #include "vm/intermediate_language.h"
9 9
10 #include "vm/compiler.h" 10 #include "vm/compiler.h"
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2557 2557
2558 2558
2559 LocationSummary* CatchBlockEntryInstr::MakeLocationSummary(Zone* zone, 2559 LocationSummary* CatchBlockEntryInstr::MakeLocationSummary(Zone* zone,
2560 bool opt) const { 2560 bool opt) const {
2561 UNREACHABLE(); 2561 UNREACHABLE();
2562 return NULL; 2562 return NULL;
2563 } 2563 }
2564 2564
2565 2565
2566 void CatchBlockEntryInstr::EmitNativeCode(FlowGraphCompiler* compiler) { 2566 void CatchBlockEntryInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
2567 // Ensure space for patching return sites for lazy deopt.
2568 if (!FLAG_precompiled_mode && compiler->is_optimizing()) {
2569 __ nop(ShortCallPattern::pattern_length_in_bytes());
2570 }
2571 __ Bind(compiler->GetJumpLabel(this)); 2567 __ Bind(compiler->GetJumpLabel(this));
2572 compiler->AddExceptionHandler(catch_try_index(), 2568 compiler->AddExceptionHandler(catch_try_index(),
2573 try_index(), 2569 try_index(),
2574 compiler->assembler()->CodeSize(), 2570 compiler->assembler()->CodeSize(),
2575 catch_handler_types_, 2571 catch_handler_types_,
2576 needs_stacktrace()); 2572 needs_stacktrace());
2577 // On lazy deoptimization we patch the optimized code here to enter the 2573 // On lazy deoptimization we patch the optimized code here to enter the
2578 // deoptimization stub. 2574 // deoptimization stub.
2579 const intptr_t deopt_id = Thread::ToDeoptAfter(GetDeoptId()); 2575 const intptr_t deopt_id = Thread::ToDeoptAfter(GetDeoptId());
2580 if (compiler->is_optimizing()) { 2576 if (compiler->is_optimizing()) {
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6603 __ Drop(1); 6599 __ Drop(1);
6604 __ popq(result); 6600 __ popq(result);
6605 } 6601 }
6606 6602
6607 6603
6608 } // namespace dart 6604 } // namespace dart
6609 6605
6610 #undef __ 6606 #undef __
6611 6607
6612 #endif // defined TARGET_ARCH_X64 6608 #endif // defined TARGET_ARCH_X64
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