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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/v8.h" | 5 #include "src/v8.h" |
6 | 6 |
7 #include "src/arm64/lithium-codegen-arm64.h" | 7 #include "src/arm64/lithium-codegen-arm64.h" |
8 #include "src/arm64/lithium-gap-resolver-arm64.h" | 8 #include "src/arm64/lithium-gap-resolver-arm64.h" |
9 #include "src/base/bits.h" | 9 #include "src/base/bits.h" |
10 #include "src/code-factory.h" | 10 #include "src/code-factory.h" |
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849 | 849 |
850 UseScratchRegisterScope temps(masm()); | 850 UseScratchRegisterScope temps(masm()); |
851 Register entry_offset = temps.AcquireX(); | 851 Register entry_offset = temps.AcquireX(); |
852 | 852 |
853 int length = jump_table_.length(); | 853 int length = jump_table_.length(); |
854 for (int i = 0; i < length; i++) { | 854 for (int i = 0; i < length; i++) { |
855 Deoptimizer::JumpTableEntry* table_entry = jump_table_[i]; | 855 Deoptimizer::JumpTableEntry* table_entry = jump_table_[i]; |
856 __ Bind(&table_entry->label); | 856 __ Bind(&table_entry->label); |
857 | 857 |
858 Address entry = table_entry->address; | 858 Address entry = table_entry->address; |
859 DeoptComment(table_entry->reason); | 859 DeoptComment(table_entry->deopt_info); |
860 | 860 |
861 // Second-level deopt table entries are contiguous and small, so instead | 861 // Second-level deopt table entries are contiguous and small, so instead |
862 // of loading the full, absolute address of each one, load the base | 862 // of loading the full, absolute address of each one, load the base |
863 // address and add an immediate offset. | 863 // address and add an immediate offset. |
864 __ Mov(entry_offset, entry - base); | 864 __ Mov(entry_offset, entry - base); |
865 | 865 |
866 // The last entry can fall through into `call_deopt_entry`, avoiding a | 866 // The last entry can fall through into `call_deopt_entry`, avoiding a |
867 // branch. | 867 // branch. |
868 bool last_entry = (i + 1) == length; | 868 bool last_entry = (i + 1) == length; |
869 | 869 |
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1050 __ Pop(x2, x1, x0); | 1050 __ Pop(x2, x1, x0); |
1051 } | 1051 } |
1052 | 1052 |
1053 if (info()->ShouldTrapOnDeopt()) { | 1053 if (info()->ShouldTrapOnDeopt()) { |
1054 Label dont_trap; | 1054 Label dont_trap; |
1055 __ B(&dont_trap, InvertBranchType(branch_type), reg, bit); | 1055 __ B(&dont_trap, InvertBranchType(branch_type), reg, bit); |
1056 __ Debug("trap_on_deopt", __LINE__, BREAK); | 1056 __ Debug("trap_on_deopt", __LINE__, BREAK); |
1057 __ Bind(&dont_trap); | 1057 __ Bind(&dont_trap); |
1058 } | 1058 } |
1059 | 1059 |
1060 Deoptimizer::Reason reason(instr->hydrogen_value()->position().raw(), | 1060 Deoptimizer::DeoptInfo deopt_info(instr->hydrogen_value()->position().raw(), |
1061 instr->Mnemonic(), deopt_reason); | 1061 instr->Mnemonic(), deopt_reason); |
1062 DCHECK(info()->IsStub() || frame_is_built_); | 1062 DCHECK(info()->IsStub() || frame_is_built_); |
1063 // Go through jump table if we need to build frame, or restore caller doubles. | 1063 // Go through jump table if we need to build frame, or restore caller doubles. |
1064 if (branch_type == always && | 1064 if (branch_type == always && |
1065 frame_is_built_ && !info()->saves_caller_doubles()) { | 1065 frame_is_built_ && !info()->saves_caller_doubles()) { |
1066 DeoptComment(reason); | 1066 DeoptComment(deopt_info); |
1067 __ Call(entry, RelocInfo::RUNTIME_ENTRY); | 1067 __ Call(entry, RelocInfo::RUNTIME_ENTRY); |
1068 } else { | 1068 } else { |
1069 Deoptimizer::JumpTableEntry* table_entry = | 1069 Deoptimizer::JumpTableEntry* table_entry = |
1070 new (zone()) Deoptimizer::JumpTableEntry(entry, reason, bailout_type, | 1070 new (zone()) Deoptimizer::JumpTableEntry( |
1071 !frame_is_built_); | 1071 entry, deopt_info, bailout_type, !frame_is_built_); |
1072 // We often have several deopts to the same entry, reuse the last | 1072 // We often have several deopts to the same entry, reuse the last |
1073 // jump entry if this is the case. | 1073 // jump entry if this is the case. |
1074 if (jump_table_.is_empty() || | 1074 if (jump_table_.is_empty() || |
1075 !table_entry->IsEquivalentTo(*jump_table_.last())) { | 1075 !table_entry->IsEquivalentTo(*jump_table_.last())) { |
1076 jump_table_.Add(table_entry, zone()); | 1076 jump_table_.Add(table_entry, zone()); |
1077 } | 1077 } |
1078 __ B(&jump_table_.last()->label, branch_type, reg, bit); | 1078 __ B(&jump_table_.last()->label, branch_type, reg, bit); |
1079 } | 1079 } |
1080 } | 1080 } |
1081 | 1081 |
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6096 Handle<ScopeInfo> scope_info = instr->scope_info(); | 6096 Handle<ScopeInfo> scope_info = instr->scope_info(); |
6097 __ Push(scope_info); | 6097 __ Push(scope_info); |
6098 __ Push(ToRegister(instr->function())); | 6098 __ Push(ToRegister(instr->function())); |
6099 CallRuntime(Runtime::kPushBlockContext, 2, instr); | 6099 CallRuntime(Runtime::kPushBlockContext, 2, instr); |
6100 RecordSafepoint(Safepoint::kNoLazyDeopt); | 6100 RecordSafepoint(Safepoint::kNoLazyDeopt); |
6101 } | 6101 } |
6102 | 6102 |
6103 | 6103 |
6104 | 6104 |
6105 } } // namespace v8::internal | 6105 } } // namespace v8::internal |
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