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f76fc366de08dc648af7377bc0eb7ccd2de4e448
sdk/pkg/dart2bytecode/testcases/async.dart.expect
T
Tess Strickland a02596b28f [vm,dyn_modules] Source position cleanups and fewer temp uses. 
Reduces the usage of temps in the following cases to remove unneeded
StoreLocal/Push instructions:

Refactors visitVariableSet so that a temporary is used only if the
variable is captured and the result is not ignored. (That is,
sets of uncaptured late final fields no longer need a temporary.)

Only allocate a temp for FunctionDeclarations and FunctionExpressions
if there are function type arguments to capture or if the function
is generic (in which case the delayed type arguments field must be
empty-initialized, not null initialized).

-----

Clean up how source positions are emitted to both be more consistent
and to also move some source position emissions closer to the actual
instruction that performs the operation:

Move emission of debugging information for FunctionDeclaration,
and VariableSet to when the variable is actually set. The emission
in VariableDeclaration stays before the initializer as that's when
debugger tests expect to pause at it.

Change the implementation of _genConditionAndJumpIf to use if/else
chaining instead of early returns so that the condition's source
position can be recorded once before the if/then chain and then the
previous source position restored afterward the chain. This means
that _emitDebuggerInformation can be used.

_generateNonLocalControlTransfer is only called during visit methods
where the parent call to _generateNode has already recorded the from
node's position, so there's no need to record it during that call.
Instead, move the emission of the source position to the jump within the
passed continuation.

Remove _emitLocalSourcePosition, since it is no longer used.

Cq-Include-Trybots: luci.dart.try:vm-dyn-linux-debug-x64-try,vm-dyn-mac-debug-arm64-try
Change-Id: Id7722146769c57713ae466d67401258c010cee37
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/473380
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
2026-01-19 04:04:43 -08:00

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Bytecode
Dynamic Module Entry Point: DART_SDK/pkg/dart2bytecode/testcases/async.dart::main
Library 'DART_SDK/pkg/dart2bytecode/testcases/async.dart'
name '#lib'
script 'DART_SDK/pkg/dart2bytecode/testcases/async.dart'
Class '', script = 'DART_SDK/pkg/dart2bytecode/testcases/async.dart'
Field 'asyncInFieldInitializer', type = FunctionType (dart:async::Future < dart:core::int >) -> dart:async::Future < Null >, getter = 'get:asyncInFieldInitializer', reflectable, static, is-late, has-initializer
initializer
Bytecode {
Entry 2
CheckStack 0
PushConstant CP#0
Push r0
PushNull
AllocateClosure
ReturnTOS
}
ConstantPool {
[0] = ClosureFunction 0
[1] = InstanceField dart:core::_Closure::_context (field)
[2] = Reserved
[3] = Type dart:async::Future < dart:core::int >
[4] = ObjectRef 'x'
[5] = SubtypeTestCache
[6] = ObjectRef < Null >
[7] = DirectCall 'dart:async::_SuspendState::_initAsync', ArgDesc num-args 0, num-type-args 1, names []
[8] = Reserved
[9] = Type dynamic
[10] = DirectCall 'dart:async::_SuspendState::_await', ArgDesc num-args 2, num-type-args 0, names []
[11] = Reserved
[12] = DirectCall 'dart:async::_SuspendState::_returnAsync', ArgDesc num-args 2, num-type-args 0, names []
[13] = Reserved
[14] = DirectCall 'dart:async::_SuspendState::_handleException', ArgDesc num-args 3, num-type-args 0, names []
[15] = Reserved
[16] = EndClosureFunctionScope
}
Closure DART_SDK/pkg/dart2bytecode/testcases/async.dart::asyncInFieldInitializer (field)::'<anonymous closure>' async (dart:async::Future < dart:core::int > x) -> dart:async::Future < Null >
ClosureCode {
EntrySuspendable 2, 0, 0
Frame 5
Push r1
LoadFieldTOS CP#1
PopLocal r3
CheckStack 0
JumpIfUnchecked L1
Push r2
PushConstant CP#3
PushNull
PushNull
PushConstant CP#4
AssertAssignable 0, CP#5
Drop1
L1:
PushConstant CP#6
DirectCall CP#7, 1
PopLocal r0
Try #0 start:
Push r2
PopLocal r6
Suspend L2
Push r0
Push r6
DirectCall CP#10, 2
ReturnTOS
L2:
Drop1
PushNull
PopLocal r5
Push r0
Push r5
PushNull
PopLocal r0
DirectCall CP#12, 2
ReturnTOS
Try #0 end:
Try #0 handler:
SetFrame 7
Push r0
JumpIfNull L3
Push r0
MoveSpecial exception, r0
Push r0
MoveSpecial stackTrace, r0
Push r0
DirectCall CP#14, 3
ReturnTOS
L3:
MoveSpecial exception, r0
Push r0
MoveSpecial stackTrace, r0
Push r0
Throw 1
}
Function 'foo', static, reflectable, debuggable, async
parameters [] (required: 0)
return-type dart:async::Future < dart:core::int >
Bytecode {
EntrySuspendable 0, 0, 0
Frame 2
CheckStack 0
PushConstant CP#0
DirectCall CP#1, 1
PopLocal r0
Try #0 start:
PushInt 42
PopLocal r1
Push r0
Push r1
PushNull
PopLocal r0
DirectCall CP#4, 2
ReturnTOS
Try #0 end:
Try #0 handler:
SetFrame 2
Push r0
JumpIfNull L1
Push r0
MoveSpecial exception, r0
Push r0
MoveSpecial stackTrace, r0
Push r0
DirectCall CP#6, 3
ReturnTOS
L1:
MoveSpecial exception, r0
Push r0
MoveSpecial stackTrace, r0
Push r0
Throw 1
}
ExceptionsTable {
try-index 0, outer -1, start 15, end 30, handler 30, needs-stack-trace, synthetic, types [CP#3]
}
ConstantPool {
[0] = ObjectRef < dart:core::int >
[1] = DirectCall 'dart:async::_SuspendState::_initAsync', ArgDesc num-args 0, num-type-args 1, names []
[2] = Reserved
[3] = Type dynamic
[4] = DirectCall 'dart:async::_SuspendState::_returnAsync', ArgDesc num-args 2, num-type-args 0, names []
[5] = Reserved
[6] = DirectCall 'dart:async::_SuspendState::_handleException', ArgDesc num-args 3, num-type-args 0, names []
[7] = Reserved
}
Function 'simpleAsyncAwait', static, reflectable, debuggable, async
parameters [dart:async::Future < dart:core::int > 'a', dart:async::Future < dart:core::int > 'b'] (required: 2)
return-type dart:async::Future < dart:core::int >
Bytecode {
EntrySuspendable 2, 0, 0
Frame 3
CheckStack 0
PushConstant CP#0
DirectCall CP#1, 1
PopLocal r0
Try #0 start:
Push r1
PopLocal r4
Suspend L1
Push r0
Push r4
DirectCall CP#4, 2
ReturnTOS
L1:
Push r2
PopLocal r4
Suspend L2
Push r0
Push r4
DirectCall CP#4, 2
ReturnTOS
L2:
AddInt
PopLocal r3
Push r0
Push r3
PushNull
PopLocal r0
DirectCall CP#6, 2
ReturnTOS
Try #0 end:
Try #0 handler:
SetFrame 5
Push r0
JumpIfNull L3
Push r0
MoveSpecial exception, r0
Push r0
MoveSpecial stackTrace, r0
Push r0
DirectCall CP#8, 3
ReturnTOS
L3:
MoveSpecial exception, r0
Push r0
MoveSpecial stackTrace, r0
Push r0
Throw 1
}
ExceptionsTable {
try-index 0, outer -1, start 15, end 61, handler 61, needs-stack-trace, synthetic, types [CP#3]
}
ConstantPool {
[0] = ObjectRef < dart:core::int >
[1] = DirectCall 'dart:async::_SuspendState::_initAsync', ArgDesc num-args 0, num-type-args 1, names []
[2] = Reserved
[3] = Type dynamic
[4] = DirectCall 'dart:async::_SuspendState::_await', ArgDesc num-args 2, num-type-args 0, names []
[5] = Reserved
[6] = DirectCall 'dart:async::_SuspendState::_returnAsync', ArgDesc num-args 2, num-type-args 0, names []
[7] = Reserved
[8] = DirectCall 'dart:async::_SuspendState::_handleException', ArgDesc num-args 3, num-type-args 0, names []
[9] = Reserved
}
Function 'loops', static, reflectable, debuggable, async
parameters [dart:core::List < dart:core::int > 'list'] (required: 1)
return-type dart:async::Future < dart:core::int >
Bytecode {
EntrySuspendable 1, 0, 0
Frame 7
CheckStack 0
PushConstant CP#0
DirectCall CP#1, 1
PopLocal r0
Try #0 start:
PushInt 0
PopLocal r3
PushInt 0
PopLocal r4
L5:
CheckStack 1
Push r4
PushInt 10
CompareIntLt
JumpIfFalse L1
Push r1
InterfaceCall CP#4, 1
PopLocal r5
L4:
CheckStack 2
Push r5
InterfaceCall CP#6, 1
JumpIfFalse L2
Push r5
InterfaceCall CP#8, 1
PopLocal r6
Push r3
Push r4
Push r6
AddInt
DirectCall CP#10, 0
PopLocal r7
Suspend L3
Push r0
Push r7
DirectCall CP#12, 2
ReturnTOS
L3:
AddInt
AddInt
PopLocal r3
Jump L4
L2:
Push r4
PushInt 1
AddInt
StoreLocal r4
Drop1
Jump L5
L1:
PushInt 0
PopLocal r4
L7:
CheckStack 1
Push r4
PushInt 10
CompareIntLt
JumpIfFalse L6
Push r3
Push r4
AddInt
PopLocal r3
Push r4
PushInt 1
AddInt
StoreLocal r4
Drop1
Jump L7
L6:
Push r3
PopLocal r2
Push r0
Push r2
PushNull
PopLocal r0
DirectCall CP#14, 2
ReturnTOS
Try #0 end:
Try #0 handler:
SetFrame 8
Push r0
JumpIfNull L8
Push r0
MoveSpecial exception, r0
Push r0
MoveSpecial stackTrace, r0
Push r0
DirectCall CP#16, 3
ReturnTOS
L8:
MoveSpecial exception, r0
Push r0
MoveSpecial stackTrace, r0
Push r0
Throw 1
}
ExceptionsTable {
try-index 0, outer -1, start 15, end 146, handler 146, needs-stack-trace, synthetic, types [CP#3]
}
ConstantPool {
[0] = ObjectRef < dart:core::int >
[1] = DirectCall 'dart:async::_SuspendState::_initAsync', ArgDesc num-args 0, num-type-args 1, names []
[2] = Reserved
[3] = Type dynamic
[4] = InterfaceCall 'dart:core::Iterable::get:iterator', ArgDesc num-args 1, num-type-args 0, names []
[5] = Reserved
[6] = InterfaceCall 'dart:core::Iterator::moveNext', ArgDesc num-args 1, num-type-args 0, names []
[7] = Reserved
[8] = InterfaceCall 'dart:core::Iterator::get:current', ArgDesc num-args 1, num-type-args 0, names []
[9] = Reserved
[10] = DirectCall 'DART_SDK/pkg/dart2bytecode/testcases/async.dart::foo', ArgDesc num-args 0, num-type-args 0, names []
[11] = Reserved
[12] = DirectCall 'dart:async::_SuspendState::_await', ArgDesc num-args 2, num-type-args 0, names []
[13] = Reserved
[14] = DirectCall 'dart:async::_SuspendState::_returnAsync', ArgDesc num-args 2, num-type-args 0, names []
[15] = Reserved
[16] = DirectCall 'dart:async::_SuspendState::_handleException', ArgDesc num-args 3, num-type-args 0, names []
[17] = Reserved
}
Function 'tryCatchRethrow', static, reflectable, debuggable, async
parameters [dart:async::Future < dart:core::int > 'a', dart:async::Future < dart:core::int > 'b', dart:async::Future < dart:core::int > 'c'] (required: 3)
return-type dart:async::Future < dart:core::int >
Bytecode {
EntrySuspendable 3, 0, 0
Frame 9
CheckStack 0
PushConstant CP#0
DirectCall CP#1, 1
PopLocal r0
Try #0 start:
PushInt 1
PopLocal r5
Try #1 start:
Try #2 start:
Push r5
Push r1
PopLocal r10
Suspend L1
Push r0
Push r10
DirectCall CP#4, 2
ReturnTOS
L1:
AddInt
PopLocal r5
Jump L2
Try #2 end:
Try #2 handler:
SetFrame 12
MoveSpecial exception, r8
MoveSpecial stackTrace, r9
Push r8
PopLocal r10
Push r10
PushConstant CP#7
InterfaceCall CP#8, 2
JumpIfFalse L3
Jump L4
L3:
Push r5
Push r2
PopLocal r11
Suspend L5
Push r0
Push r11
DirectCall CP#4, 2
ReturnTOS
L5:
AddInt
PopLocal r5
Push r8
Push r9
Throw 1
L2:
Jump L6
Try #1 end:
Try #1 handler:
SetFrame 12
MoveSpecial exception, r6
MoveSpecial stackTrace, r7
PushConstant CP#10
DirectCall CP#11, 1
Drop1
Push r5
Push r3
PopLocal r8
Suspend L7
Push r0
Push r8
DirectCall CP#4, 2
ReturnTOS
L7:
AddInt
PopLocal r5
Push r5
PopLocal r4
Push r0
Push r4
PushNull
PopLocal r0
DirectCall CP#13, 2
ReturnTOS
L4:
PushConstant CP#10
DirectCall CP#11, 1
Drop1
Push r5
Push r3
PopLocal r8
Suspend L8
Push r0
Push r8
DirectCall CP#4, 2
ReturnTOS
L8:
AddInt
PopLocal r5
Push r5
PopLocal r4
Push r0
Push r4
PushNull
PopLocal r0
DirectCall CP#13, 2
ReturnTOS
L6:
PushConstant CP#10
DirectCall CP#11, 1
Drop1
Push r5
Push r3
PopLocal r8
Suspend L9
Push r0
Push r8
DirectCall CP#4, 2
ReturnTOS
L9:
AddInt
PopLocal r5
Push r5
PopLocal r4
Push r0
Push r4
PushNull
PopLocal r0
DirectCall CP#13, 2
ReturnTOS
Try #0 end:
Try #0 handler:
SetFrame 12
Push r0
JumpIfNull L10
Push r0
MoveSpecial exception, r0
Push r0
MoveSpecial stackTrace, r0
Push r0
DirectCall CP#15, 3
ReturnTOS
L10:
MoveSpecial exception, r0
Push r0
MoveSpecial stackTrace, r0
Push r0
Throw 1
}
ExceptionsTable {
try-index 0, outer -1, start 15, end 236, handler 236, needs-stack-trace, synthetic, types [CP#3]
try-index 1, outer 0, start 19, end 102, handler 102, needs-stack-trace, synthetic, types [CP#3]
try-index 2, outer 1, start 19, end 44, handler 44, needs-stack-trace, types [CP#6]
}
ConstantPool {
[0] = ObjectRef < dart:core::int >
[1] = DirectCall 'dart:async::_SuspendState::_initAsync', ArgDesc num-args 0, num-type-args 1, names []
[2] = Reserved
[3] = Type dynamic
[4] = DirectCall 'dart:async::_SuspendState::_await', ArgDesc num-args 2, num-type-args 0, names []
[5] = Reserved
[6] = Type dart:core::Object
[7] = Type dart:core::Error
[8] = InterfaceCall 'dart:core::Object::_simpleInstanceOf', ArgDesc num-args 2, num-type-args 0, names []
[9] = Reserved
[10] = ObjectRef 'fin'
[11] = DirectCall 'dart:core::print', ArgDesc num-args 1, num-type-args 0, names []
[12] = Reserved
[13] = DirectCall 'dart:async::_SuspendState::_returnAsync', ArgDesc num-args 2, num-type-args 0, names []
[14] = Reserved
[15] = DirectCall 'dart:async::_SuspendState::_handleException', ArgDesc num-args 3, num-type-args 0, names []
[16] = Reserved
}
Function 'closure', static, reflectable, debuggable
parameters [dart:async::Future < dart:core::int > 'a'] (required: 1)
return-type dynamic
Bytecode {
Entry 3
CheckStack 0
AllocateContext 0, 2
PopLocal r0
Push r0
Push FP[-5]
StoreContextVar 0, 0
Push r0
PushInt 3
StoreContextVar 0, 1
PushConstant CP#0
Push r0
PushNull
AllocateClosure
PopLocal r2
Push r2
ReturnTOS
}
ConstantPool {
[0] = ClosureFunction 0
[1] = InstanceField dart:core::_Closure::_context (field)
[2] = Reserved
[3] = ObjectRef < dart:core::int >
[4] = DirectCall 'dart:async::_SuspendState::_initAsync', ArgDesc num-args 0, num-type-args 1, names []
[5] = Reserved
[6] = Type dynamic
[7] = DirectCall 'dart:async::_SuspendState::_await', ArgDesc num-args 2, num-type-args 0, names []
[8] = Reserved
[9] = ObjectRef 'fin'
[10] = DirectCall 'dart:core::print', ArgDesc num-args 1, num-type-args 0, names []
[11] = Reserved
[12] = DirectCall 'dart:async::_SuspendState::_returnAsync', ArgDesc num-args 2, num-type-args 0, names []
[13] = Reserved
[14] = DirectCall 'dart:async::_SuspendState::_handleException', ArgDesc num-args 3, num-type-args 0, names []
[15] = Reserved
[16] = EndClosureFunctionScope
}
Closure DART_SDK/pkg/dart2bytecode/testcases/async.dart::closure::'nested' async () -> dart:async::Future < dart:core::int >
ClosureCode {
EntrySuspendable 1, 0, 0
Frame 8
Push r1
LoadFieldTOS CP#1
PopLocal r2
CheckStack 0
PushConstant CP#3
DirectCall CP#4, 1
PopLocal r0
Try #0 start:
PushInt 4
PopLocal r5
Push r2
PopLocal r6
Try #1 start:
Push r2
PushInt 5
StoreContextVar 0, 1
Push r2
LoadContextVar 0, 0
PopLocal r8
Suspend L1
Push r0
Push r8
DirectCall CP#7, 2
ReturnTOS
L1:
PopLocal r5
Push r2
LoadContextVar 0, 1
Push r5
AddInt
PopLocal r4
Jump L2
Try #1 end:
Try #1 handler:
SetFrame 9
Push r6
PopLocal r2
MoveSpecial exception, r6
MoveSpecial stackTrace, r7
PushConstant CP#9
DirectCall CP#10, 1
Drop1
Push r6
Push r7
Throw 1
L2:
Push r6
PopLocal r2
PushConstant CP#9
DirectCall CP#10, 1
Drop1
Push r4
PopLocal r4
Push r0
Push r4
PushNull
PopLocal r0
DirectCall CP#12, 2
ReturnTOS
Try #0 end:
Try #0 handler:
SetFrame 9
Push r0
JumpIfNull L3
Push r0
MoveSpecial exception, r0
Push r0
MoveSpecial stackTrace, r0
Push r0
DirectCall CP#14, 3
ReturnTOS
L3:
MoveSpecial exception, r0
Push r0
MoveSpecial stackTrace, r0
Push r0
Throw 1
}
Function 'testAssert', static, reflectable, debuggable, async
parameters [dart:async::Future < dart:core::int > 'a'] (required: 1)
return-type dart:async::Future < dart:core::int >
Bytecode {
EntrySuspendable 1, 0, 0
Frame 2
CheckStack 0
PushConstant CP#0
DirectCall CP#1, 1
PopLocal r0
Try #0 start:
PushInt 7
PopLocal r2
Push r0
Push r2
PushNull
PopLocal r0
DirectCall CP#4, 2
ReturnTOS
Try #0 end:
Try #0 handler:
SetFrame 3
Push r0
JumpIfNull L1
Push r0
MoveSpecial exception, r0
Push r0
MoveSpecial stackTrace, r0
Push r0
DirectCall CP#6, 3
ReturnTOS
L1:
MoveSpecial exception, r0
Push r0
MoveSpecial stackTrace, r0
Push r0
Throw 1
}
ExceptionsTable {
try-index 0, outer -1, start 15, end 30, handler 30, needs-stack-trace, synthetic, types [CP#3]
}
ConstantPool {
[0] = ObjectRef < dart:core::int >
[1] = DirectCall 'dart:async::_SuspendState::_initAsync', ArgDesc num-args 0, num-type-args 1, names []
[2] = Reserved
[3] = Type dynamic
[4] = DirectCall 'dart:async::_SuspendState::_returnAsync', ArgDesc num-args 2, num-type-args 0, names []
[5] = Reserved
[6] = DirectCall 'dart:async::_SuspendState::_handleException', ArgDesc num-args 3, num-type-args 0, names []
[7] = Reserved
}
Function 'main', static, reflectable, debuggable
parameters [] (required: 0)
return-type dynamic
Bytecode {
Entry 0
CheckStack 0
PushNull
ReturnTOS
}
ConstantPool {
}
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