7be64db45f
This is a reland of cf93071c91
Original change's description:
> [interpreter] Short Star bytecode
>
> Design doc:
> https://docs.google.com/document/d/1g_NExMT78II_KnIYNa9MvyPYIj23qAiFUEsyemY5KRk/edit
>
> This change adds 16 new interpreter opcodes, kStar0 through kStar15, so
> that we can use a single byte to represent the common operation of
> storing to a low-numbered register. This generally reduces the quantity
> of bytecode generated on web sites by 8-9%.
>
> In order to not degrade speed, a couple of other changes are required:
>
> The existing lookahead logic to check for Star after certain other
> bytecode handlers is updated to check for these new short Star codes
> instead. Furthermore, that lookahead logic is updated to contain its own
> copy of the dispatch jump rather than merging control flow with the
> lookahead-failed case, to improve branch prediction.
>
> A bunch of constants use bytecode size in bytes as a proxy for the size
> or complexity of a function, and are adjusted downward proportionally to
> the decrease in generated bytecode size.
>
> Other small drive-by fix: update generate-bytecode-expectations to emit
> \n instead of \r\n on Windows.
>
> Change-Id: I6307c2b0f5794a3a1088bb0fb94f6e1615441ed5
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2641180
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Cr-Commit-Position: refs/heads/master@{#72773}
Change-Id: I1afb670c25694498b3989de615858f984a8c7f6f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2698057
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72821}
410 lines
13 KiB
Plaintext
410 lines
13 KiB
Plaintext
#
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# Autogenerated by generate-bytecode-expectations.
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#
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---
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wrap: yes
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---
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snippet: "
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var x, a = [0,1,2,3];
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[x] = a;
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"
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frame size: 13
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parameter count: 1
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bytecode array length: 129
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bytecodes: [
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/* 45 S> */ B(CreateArrayLiteral), U8(0), U8(0), U8(37),
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B(Star1),
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/* 60 S> */ B(GetIterator), R(1), U8(1), U8(3),
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B(Mov), R(1), R(2),
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B(JumpIfJSReceiver), U8(7),
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B(CallRuntime), U16(Runtime::kThrowSymbolIteratorInvalid), R(0), U8(0),
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B(Star4),
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B(LdaNamedProperty), R(4), U8(1), U8(5),
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B(Star3),
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B(LdaFalse),
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B(Star5),
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B(Mov), R(context), R(8),
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/* 57 S> */ B(Ldar), R(5),
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B(JumpIfToBooleanTrue), U8(33),
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B(LdaTrue),
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B(Star5),
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B(CallProperty0), R(3), R(4), U8(11),
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B(Star9),
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B(JumpIfJSReceiver), U8(7),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(9), U8(1),
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B(LdaNamedProperty), R(9), U8(2), U8(9),
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B(JumpIfToBooleanTrue), U8(13),
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B(LdaNamedProperty), R(9), U8(3), U8(7),
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B(Star9),
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B(LdaFalse),
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B(Star5),
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B(Ldar), R(9),
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B(Jump), U8(3),
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B(LdaUndefined),
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B(Star0),
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B(LdaSmi), I8(-1),
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B(Star7),
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B(Star6),
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B(Jump), U8(5),
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B(Star7),
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B(LdaZero),
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B(Star6),
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B(LdaTheHole),
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B(SetPendingMessage),
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B(Star8),
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B(Ldar), R(5),
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B(JumpIfToBooleanTrue), U8(35),
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B(Mov), R(context), R(10),
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B(LdaNamedProperty), R(4), U8(4), U8(13),
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B(JumpIfUndefinedOrNull), U8(26),
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B(Star11),
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B(CallProperty0), R(11), R(4), U8(15),
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B(JumpIfJSReceiver), U8(19),
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B(Star12),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(12), U8(1),
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B(Jump), U8(11),
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B(Star10),
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B(LdaZero),
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B(TestReferenceEqual), R(6),
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B(JumpIfTrue), U8(5),
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B(Ldar), R(10),
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B(ReThrow),
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B(Ldar), R(8),
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B(SetPendingMessage),
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B(LdaZero),
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B(TestReferenceEqual), R(6),
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B(JumpIfFalse), U8(5),
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B(Ldar), R(7),
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B(ReThrow),
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B(LdaUndefined),
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/* 65 S> */ B(Return),
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]
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constant pool: [
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ARRAY_BOILERPLATE_DESCRIPTION_TYPE,
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["next"],
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["done"],
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["value"],
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["return"],
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]
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handlers: [
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[30, 67, 73],
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[86, 105, 107],
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]
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---
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snippet: "
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var x, y, a = [0,1,2,3];
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[,x,...y] = a;
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"
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frame size: 14
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parameter count: 1
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bytecode array length: 210
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bytecodes: [
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/* 48 S> */ B(CreateArrayLiteral), U8(0), U8(0), U8(37),
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B(Star2),
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/* 69 S> */ B(GetIterator), R(2), U8(1), U8(3),
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B(Mov), R(2), R(3),
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B(JumpIfJSReceiver), U8(7),
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B(CallRuntime), U16(Runtime::kThrowSymbolIteratorInvalid), R(0), U8(0),
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B(Star5),
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B(LdaNamedProperty), R(5), U8(1), U8(5),
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B(Star4),
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B(LdaFalse),
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B(Star6),
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B(Mov), R(context), R(9),
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B(Ldar), R(6),
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B(JumpIfToBooleanTrue), U8(31),
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B(LdaTrue),
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B(Star6),
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B(CallProperty0), R(4), R(5), U8(11),
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B(Star10),
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B(JumpIfJSReceiver), U8(7),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(10), U8(1),
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B(LdaNamedProperty), R(10), U8(2), U8(9),
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B(JumpIfToBooleanTrue), U8(11),
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B(LdaNamedProperty), R(10), U8(3), U8(7),
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B(Star10),
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B(LdaFalse),
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B(Star6),
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B(Ldar), R(10),
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/* 61 S> */ B(Ldar), R(6),
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B(JumpIfToBooleanTrue), U8(33),
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B(LdaTrue),
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B(Star6),
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B(CallProperty0), R(4), R(5), U8(13),
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B(Star10),
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B(JumpIfJSReceiver), U8(7),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(10), U8(1),
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B(LdaNamedProperty), R(10), U8(2), U8(9),
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B(JumpIfToBooleanTrue), U8(13),
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B(LdaNamedProperty), R(10), U8(3), U8(7),
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B(Star10),
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B(LdaFalse),
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B(Star6),
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B(Ldar), R(10),
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B(Jump), U8(3),
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B(LdaUndefined),
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B(Star0),
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/* 63 S> */ B(CreateEmptyArrayLiteral), U8(15),
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B(Star11),
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B(Ldar), R(6),
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B(JumpIfToBooleanTrue), U8(40),
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B(LdaZero),
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B(Star12),
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B(LdaTrue),
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B(Star6),
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B(CallProperty0), R(4), R(5), U8(19),
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B(Star10),
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B(JumpIfJSReceiver), U8(7),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(10), U8(1),
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B(LdaNamedProperty), R(10), U8(2), U8(21),
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B(JumpIfToBooleanTrue), U8(18),
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B(LdaNamedProperty), R(10), U8(3), U8(7),
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B(StaInArrayLiteral), R(11), R(12), U8(16),
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B(Ldar), R(12),
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B(Inc), U8(18),
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B(Star12),
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B(JumpLoop), U8(31), I8(0),
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B(Mov), R(11), R(1),
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B(LdaSmi), I8(-1),
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B(Star8),
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B(Star7),
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B(Jump), U8(5),
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B(Star8),
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B(LdaZero),
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B(Star7),
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B(LdaTheHole),
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B(SetPendingMessage),
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B(Star9),
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B(Ldar), R(6),
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B(JumpIfToBooleanTrue), U8(35),
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B(Mov), R(context), R(11),
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B(LdaNamedProperty), R(5), U8(4), U8(23),
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B(JumpIfUndefinedOrNull), U8(26),
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B(Star12),
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B(CallProperty0), R(12), R(5), U8(25),
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B(JumpIfJSReceiver), U8(19),
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B(Star13),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(13), U8(1),
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B(Jump), U8(11),
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B(Star11),
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B(LdaZero),
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B(TestReferenceEqual), R(7),
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B(JumpIfTrue), U8(5),
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B(Ldar), R(11),
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B(ReThrow),
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B(Ldar), R(9),
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B(SetPendingMessage),
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B(LdaZero),
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B(TestReferenceEqual), R(7),
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B(JumpIfFalse), U8(5),
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B(Ldar), R(8),
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B(ReThrow),
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B(LdaUndefined),
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/* 74 S> */ B(Return),
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]
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constant pool: [
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ARRAY_BOILERPLATE_DESCRIPTION_TYPE,
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["next"],
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["done"],
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["value"],
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["return"],
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]
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handlers: [
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[30, 148, 154],
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[167, 186, 188],
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]
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---
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snippet: "
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var x={}, y, a = [0];
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[x.foo,y=4] = a;
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"
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frame size: 15
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parameter count: 1
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bytecode array length: 175
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bytecodes: [
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/* 40 S> */ B(CreateEmptyObjectLiteral),
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B(Star0),
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/* 51 S> */ B(CreateArrayLiteral), U8(0), U8(0), U8(37),
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B(Star2),
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/* 68 S> */ B(GetIterator), R(2), U8(1), U8(3),
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B(Mov), R(2), R(3),
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B(JumpIfJSReceiver), U8(7),
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B(CallRuntime), U16(Runtime::kThrowSymbolIteratorInvalid), R(0), U8(0),
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B(Star5),
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B(LdaNamedProperty), R(5), U8(1), U8(5),
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B(Star4),
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B(LdaFalse),
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B(Star6),
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B(Mov), R(context), R(9),
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/* 59 S> */ B(Ldar), R(6),
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B(Mov), R(0), R(11),
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B(JumpIfToBooleanTrue), U8(33),
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B(LdaTrue),
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B(Star6),
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B(CallProperty0), R(4), R(5), U8(11),
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B(Star10),
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B(JumpIfJSReceiver), U8(7),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(10), U8(1),
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B(LdaNamedProperty), R(10), U8(2), U8(9),
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B(JumpIfToBooleanTrue), U8(13),
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B(LdaNamedProperty), R(10), U8(3), U8(7),
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B(Star10),
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B(LdaFalse),
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B(Star6),
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B(Ldar), R(10),
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B(Jump), U8(3),
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B(LdaUndefined),
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B(StaNamedProperty), R(11), U8(4), U8(13),
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/* 63 S> */ B(Ldar), R(6),
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B(JumpIfToBooleanTrue), U8(33),
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B(LdaTrue),
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B(Star6),
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B(CallProperty0), R(4), R(5), U8(15),
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B(Star10),
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B(JumpIfJSReceiver), U8(7),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(10), U8(1),
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B(LdaNamedProperty), R(10), U8(2), U8(9),
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B(JumpIfToBooleanTrue), U8(13),
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B(LdaNamedProperty), R(10), U8(3), U8(7),
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B(Star10),
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B(LdaFalse),
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B(Star6),
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B(Ldar), R(10),
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B(JumpIfNotUndefined), U8(4),
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B(LdaSmi), I8(4),
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B(Star1),
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B(LdaSmi), I8(-1),
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B(Star8),
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B(Star7),
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B(Jump), U8(5),
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B(Star8),
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B(LdaZero),
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B(Star7),
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B(LdaTheHole),
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B(SetPendingMessage),
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B(Star9),
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B(Ldar), R(6),
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B(JumpIfToBooleanTrue), U8(35),
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B(Mov), R(context), R(12),
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B(LdaNamedProperty), R(5), U8(5), U8(17),
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B(JumpIfUndefinedOrNull), U8(26),
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B(Star13),
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B(CallProperty0), R(13), R(5), U8(19),
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B(JumpIfJSReceiver), U8(19),
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B(Star14),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(14), U8(1),
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B(Jump), U8(11),
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B(Star12),
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B(LdaZero),
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B(TestReferenceEqual), R(7),
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B(JumpIfTrue), U8(5),
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B(Ldar), R(12),
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B(ReThrow),
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B(Ldar), R(9),
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B(SetPendingMessage),
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B(LdaZero),
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B(TestReferenceEqual), R(7),
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B(JumpIfFalse), U8(5),
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B(Ldar), R(8),
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B(ReThrow),
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B(LdaUndefined),
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/* 73 S> */ B(Return),
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]
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constant pool: [
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ARRAY_BOILERPLATE_DESCRIPTION_TYPE,
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["next"],
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["done"],
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["value"],
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["foo"],
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["return"],
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]
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handlers: [
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[32, 113, 119],
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[132, 151, 153],
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]
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---
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snippet: "
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var x, a = {x:1};
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({x} = a);
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"
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frame size: 2
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parameter count: 1
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bytecode array length: 12
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bytecodes: [
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/* 45 S> */ B(CreateObjectLiteral), U8(0), U8(0), U8(41),
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B(Star1),
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/* 54 S> */ B(LdaNamedProperty), R(1), U8(1), U8(1),
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B(Star0),
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B(LdaUndefined),
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/* 63 S> */ B(Return),
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]
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constant pool: [
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OBJECT_BOILERPLATE_DESCRIPTION_TYPE,
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["x"],
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]
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handlers: [
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]
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---
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snippet: "
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var x={}, a = {y:1};
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({y:x.foo} = a);
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"
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frame size: 2
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parameter count: 1
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bytecode array length: 17
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bytecodes: [
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/* 40 S> */ B(CreateEmptyObjectLiteral),
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B(Star0),
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/* 48 S> */ B(CreateObjectLiteral), U8(0), U8(0), U8(41),
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B(Star1),
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/* 61 S> */ B(LdaNamedProperty), R(1), U8(1), U8(1),
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B(StaNamedProperty), R(0), U8(2), U8(3),
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B(LdaUndefined),
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/* 72 S> */ B(Return),
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]
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constant pool: [
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OBJECT_BOILERPLATE_DESCRIPTION_TYPE,
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["y"],
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["foo"],
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]
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handlers: [
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]
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---
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snippet: "
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var x, a = {y:1, w:2, v:3};
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({x=0,...y} = a);
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"
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frame size: 4
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parameter count: 1
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bytecode array length: 29
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bytecodes: [
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/* 45 S> */ B(CreateObjectLiteral), U8(0), U8(0), U8(41),
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B(Star1),
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/* 64 S> */ B(LdaConstant), U8(1),
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B(Star3),
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B(LdaNamedProperty), R(1), U8(1), U8(1),
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B(Mov), R(1), R(2),
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B(JumpIfNotUndefined), U8(3),
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B(LdaZero),
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B(Star0),
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/* 71 S> */ B(CallRuntime), U16(Runtime::kCopyDataPropertiesWithExcludedProperties), R(2), U8(2),
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B(StaGlobal), U8(2), U8(3),
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B(LdaUndefined),
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/* 80 S> */ B(Return),
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]
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constant pool: [
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OBJECT_BOILERPLATE_DESCRIPTION_TYPE,
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["x"],
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["y"],
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]
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handlers: [
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]
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