62d154f6a3
If a field is initialized with null (either explicitly or implicitly), field store can be omitted in bytecode. In such case, bytecode should still convey the information about this initialization to VM for field guards to work correctly. Change-Id: I1fd45b858c3c521b97fa5dbffe0e15b1ea75d92f Reviewed-on: https://dart-review.googlesource.com/76060 Reviewed-by: Zach Anderson <zra@google.com> Reviewed-by: Régis Crelier <regis@google.com>
201 lines
5.0 KiB
Plaintext
201 lines
5.0 KiB
Plaintext
library #lib;
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import self as self;
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import "dart:core" as core;
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class A extends core::Object {
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field core::int foo1;
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field core::int foo2 = null;
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field core::int foo3 = 42;
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field core::int foo4;
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field core::int foo5 = 43;
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[@vm.bytecode=
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Bytecode {
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Entry 0
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CheckStack
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Push FP[-6]
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PushInt 42
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StoreFieldTOS CP#0
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Push FP[-6]
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PushInt 43
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StoreFieldTOS CP#2
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Push FP[-6]
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Push FP[-5]
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StoreFieldTOS CP#4
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Push FP[-6]
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PushInt 44
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StoreFieldTOS CP#2
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Push FP[-6]
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PushConstant CP#7
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IndirectStaticCall 1, CP#6
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Drop1
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PushNull
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ReturnTOS
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}
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Nullable fields: [#lib::A::foo1, #lib::A::foo2]
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ConstantPool {
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[0] = InstanceField #lib::A::foo3
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[1] = Reserved
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[2] = InstanceField #lib::A::foo5
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[3] = Reserved
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[4] = InstanceField #lib::A::foo4
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[5] = Reserved
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[6] = ArgDesc num-args 1, num-type-args 0, names []
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[7] = StaticICData target 'dart.core::Object::', arg-desc CP#6
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}
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] constructor •(core::int foo4) → void
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: self::A::foo1 = null, self::A::foo4 = foo4, self::A::foo5 = 44, super core::Object::•()
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;
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[@vm.bytecode=
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Bytecode {
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Entry 0
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CheckStack
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Push FP[-7]
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PushInt 42
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StoreFieldTOS CP#0
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Push FP[-7]
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PushInt 43
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StoreFieldTOS CP#2
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Push FP[-7]
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Push FP[-6]
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StoreFieldTOS CP#4
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Push FP[-7]
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Push FP[-5]
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PushInt 1
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InstanceCall 2, CP#7
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StoreFieldTOS CP#2
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Push FP[-7]
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PushConstant CP#9
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IndirectStaticCall 1, CP#8
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Drop1
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PushNull
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ReturnTOS
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}
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Nullable fields: [#lib::A::foo2, #lib::A::foo4]
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ConstantPool {
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[0] = InstanceField #lib::A::foo3
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[1] = Reserved
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[2] = InstanceField #lib::A::foo5
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[3] = Reserved
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[4] = InstanceField #lib::A::foo1
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[5] = Reserved
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[6] = ArgDesc num-args 2, num-type-args 0, names []
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[7] = ICData target-name '+', arg-desc CP#6
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[8] = ArgDesc num-args 1, num-type-args 0, names []
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[9] = StaticICData target 'dart.core::Object::', arg-desc CP#8
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}
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] constructor constr2(core::int x, core::int y) → void
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: self::A::foo4 = null, self::A::foo1 = x, self::A::foo5 = y.{core::num::+}(1), super core::Object::•()
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;
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[@vm.bytecode=
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Bytecode {
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Entry 0
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CheckStack
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Push FP[-5]
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PushInt 45
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PushConstant CP#1
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IndirectStaticCall 2, CP#0
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Drop1
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PushNull
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ReturnTOS
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}
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ConstantPool {
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[0] = ArgDesc num-args 2, num-type-args 0, names []
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[1] = StaticICData target '#lib::A::', arg-desc CP#0
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}
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] constructor redirecting1() → void
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: this self::A::•(45)
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;
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[@vm.bytecode=
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Bytecode {
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Entry 0
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CheckStack
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Push FP[-8]
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Push FP[-7]
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Push FP[-6]
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Push FP[-5]
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InstanceCall 2, CP#1
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PushConstant CP#3
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IndirectStaticCall 3, CP#2
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Drop1
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PushNull
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ReturnTOS
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}
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ConstantPool {
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[0] = ArgDesc num-args 2, num-type-args 0, names []
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[1] = ICData target-name '*', arg-desc CP#0
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[2] = ArgDesc num-args 3, num-type-args 0, names []
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[3] = StaticICData target '#lib::A::constr2', arg-desc CP#2
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}
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] constructor redirecting2(core::int a, core::int b, core::int c) → void
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: this self::A::constr2(a, b.{core::num::*}(c))
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;
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}
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class B extends self::A {
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field core::int foo6 = 46;
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static field core::int foo7 = 47;
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static const field core::int foo8 = 48;
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[@vm.bytecode=
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Bytecode {
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Entry 0
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CheckStack
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Push FP[-5]
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PushInt 46
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StoreFieldTOS CP#0
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Push FP[-5]
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PushInt 49
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PushConstant CP#3
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IndirectStaticCall 2, CP#2
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Drop1
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PushNull
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ReturnTOS
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}
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ConstantPool {
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[0] = InstanceField #lib::B::foo6
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[1] = Reserved
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[2] = ArgDesc num-args 2, num-type-args 0, names []
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[3] = StaticICData target '#lib::A::', arg-desc CP#2
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}
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] constructor •() → void
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: super self::A::•(49)
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;
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[@vm.bytecode=
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Bytecode {
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Entry 0
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CheckStack
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Push FP[-7]
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PushInt 46
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StoreFieldTOS CP#0
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Push FP[-7]
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PushInt 50
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StoreFieldTOS CP#0
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Push FP[-7]
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Push FP[-6]
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Push FP[-5]
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PushInt 51
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PushConstant CP#3
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IndirectStaticCall 4, CP#2
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Drop1
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PushNull
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ReturnTOS
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}
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ConstantPool {
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[0] = InstanceField #lib::B::foo6
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[1] = Reserved
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[2] = ArgDesc num-args 4, num-type-args 0, names []
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[3] = StaticICData target '#lib::A::redirecting2', arg-desc CP#2
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}
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] constructor c2(core::int i, core::int j) → void
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: self::B::foo6 = 50, super self::A::redirecting2(i, j, 51)
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;
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}
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[@vm.bytecode=
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Bytecode {
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Entry 0
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CheckStack
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PushNull
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ReturnTOS
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}
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ConstantPool {
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}
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]static method main() → dynamic {}
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