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Issue 2380403003: Lazy deopt without code patching. (Closed)
Patch Set: remove tracing register assignment Created 4 years, 2 months ago
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1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2014, 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_ARM64. 5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_ARM64.
6 #if defined(TARGET_ARCH_ARM64) 6 #if defined(TARGET_ARCH_ARM64)
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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2547 2547
2548 2548
2549 LocationSummary* CatchBlockEntryInstr::MakeLocationSummary(Zone* zone, 2549 LocationSummary* CatchBlockEntryInstr::MakeLocationSummary(Zone* zone,
2550 bool opt) const { 2550 bool opt) const {
2551 UNREACHABLE(); 2551 UNREACHABLE();
2552 return NULL; 2552 return NULL;
2553 } 2553 }
2554 2554
2555 2555
2556 void CatchBlockEntryInstr::EmitNativeCode(FlowGraphCompiler* compiler) { 2556 void CatchBlockEntryInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
2557 // Ensure space for patching return sites for lazy deopt.
2558 if (!FLAG_precompiled_mode && compiler->is_optimizing()) {
2559 for (intptr_t i = 0;
2560 i < CallPattern::kDeoptCallLengthInInstructions;
2561 ++i) {
2562 __ orr(R0, ZR, Operand(R0)); // nop
2563 }
2564 }
2565 __ Bind(compiler->GetJumpLabel(this)); 2557 __ Bind(compiler->GetJumpLabel(this));
2566 compiler->AddExceptionHandler(catch_try_index(), 2558 compiler->AddExceptionHandler(catch_try_index(),
2567 try_index(), 2559 try_index(),
2568 compiler->assembler()->CodeSize(), 2560 compiler->assembler()->CodeSize(),
2569 catch_handler_types_, 2561 catch_handler_types_,
2570 needs_stacktrace()); 2562 needs_stacktrace());
2571 // On lazy deoptimization we patch the optimized code here to enter the 2563 // On lazy deoptimization we patch the optimized code here to enter the
2572 // deoptimization stub. 2564 // deoptimization stub.
2573 const intptr_t deopt_id = Thread::ToDeoptAfter(GetDeoptId()); 2565 const intptr_t deopt_id = Thread::ToDeoptAfter(GetDeoptId());
2574 if (compiler->is_optimizing()) { 2566 if (compiler->is_optimizing()) {
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5787 1, 5779 1,
5788 locs()); 5780 locs());
5789 __ Drop(1); 5781 __ Drop(1);
5790 __ Pop(result); 5782 __ Pop(result);
5791 } 5783 }
5792 5784
5793 5785
5794 } // namespace dart 5786 } // namespace dart
5795 5787
5796 #endif // defined TARGET_ARCH_ARM64 5788 #endif // defined TARGET_ARCH_ARM64
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