d6a60a0ee1
This change significantly improves the performance of string concatenation in optimized code for the case where the resulting string is represented as a ConsString. On the relevant test cases we go from serializeNaive: 10762 ms. serializeClever: 7813 ms. serializeConcat: 10271 ms. to serializeNaive: 10278 ms. serializeClever: 5533 ms. serializeConcat: 10310 ms. which represents a 30% improvement on the "clever" benchmark, which tests specifically the ConsString creation performance. This was accomplished via a couple of different steps, which are briefly outlined here: 1. The empty_string gets its own map, so that we can easily recognize and handle it appropriately in the TurboFan type system. This allows us to express (and assert) that the inputs to NewConsString are non-empty strings, making sure that TurboFan no longer creates "crippled ConsStrings" with empty left or right hand sides. 2. Further split the existing String types in TurboFan to be able to distinguish between OneByte and TwoByte strings on the type system level. This allows us to avoid having to dynamically lookup the resulting ConsString map in case of ConsString creation (i.e. when we know that both input strings are OneByte strings or at least one of the input strings is TwoByte). 3. We also introduced more finegrained feedback for the Add bytecode in the interpreter, having it collect feedback about ConsStrings, specifically ConsOneByteString and ConsTwoByteString. This feedback can be used by TurboFan to only inline the relevant code for what was seen so far. This allows us to remove the Octane/Splay specific magic in JSTypedLowering to detect ConsString creation, and instead purely rely on the feedback of what was seen so far (also making it possible to change the semantics of NewConsString to be a low-level operator, which is only introduced in SimplifiedLowering by looking at the input types of StringConcat). 4. On top of the before mentioned type and interpreter changes we added new operators CheckNonEmptyString, CheckNonEmptyOneByteString, and CheckNonEmptyTwoByteString, which perform the appropriate (dynamic) checks. There are several more improvements that are possible based on this, but since the change was already quite big, we decided not to put everything into the first change, but do some follow up tweaks to the type system, and builtin optimizations later. Tbr: mstarzinger@chromium.org Bug: v8:8834, v8:8931, v8:8939, v8:8951 Change-Id: Ia24e17c6048bf2b04df966d3cd441f0edda05c93 Cq-Include-Trybots: luci.chromium.try:linux-blink-rel Doc: https://bit.ly/fast-string-concatenation-in-javascript Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1499497 Commit-Queue: Michael Achenbach <machenbach@chromium.org> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org> Cr-Commit-Position: refs/heads/master@{#60318}
467 lines
16 KiB
Plaintext
467 lines
16 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: 15
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parameter count: 1
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bytecode array length: 178
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bytecodes: [
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/* 30 E> */ B(StackCheck),
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/* 45 S> */ B(CreateArrayLiteral), U8(0), U8(0), U8(37),
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B(Star), R(1),
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/* 60 S> */ B(LdaNamedProperty), R(1), U8(1), U8(1),
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B(Star), R(6),
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B(CallProperty0), R(6), R(1), U8(3),
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B(Mov), R(1), R(5),
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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(Star), R(4),
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B(LdaNamedProperty), R(4), U8(2), U8(5),
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B(Star), R(3),
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B(LdaFalse),
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B(Star), R(7),
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B(Mov), R(context), R(10),
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/* 57 S> */ B(Ldar), R(7),
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B(JumpIfToBooleanTrue), U8(37),
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B(LdaTrue),
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B(Star), R(7),
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B(CallProperty0), R(3), R(4), U8(11),
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B(Star), R(11),
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B(JumpIfJSReceiver), U8(7),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(11), U8(1),
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B(LdaNamedProperty), R(11), U8(3), U8(9),
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B(JumpIfToBooleanTrue), U8(15),
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B(LdaNamedProperty), R(11), U8(4), U8(7),
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B(Star), R(11),
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B(LdaFalse),
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B(Star), R(7),
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B(Ldar), R(11),
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B(Jump), U8(3),
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B(LdaUndefined),
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B(Star), R(0),
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B(LdaSmi), I8(-1),
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B(Star), R(9),
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B(Star), R(8),
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B(Jump), U8(7),
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B(Star), R(9),
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B(LdaZero),
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B(Star), R(8),
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B(LdaTheHole),
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B(SetPendingMessage),
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B(Star), R(10),
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B(Ldar), R(7),
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B(JumpIfToBooleanTrue), U8(60),
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B(LdaNamedProperty), R(4), U8(5), U8(13),
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B(Star), R(12),
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B(JumpIfUndefined), U8(52),
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B(JumpIfNull), U8(50),
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B(TestTypeOf), U8(6),
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B(JumpIfTrue), U8(18),
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B(Wide), B(LdaSmi), I16(155),
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B(Star), R(13),
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B(LdaConstant), U8(6),
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B(Star), R(14),
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B(CallRuntime), U16(Runtime::kNewTypeError), R(13), U8(2),
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B(Throw),
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B(Mov), R(context), R(13),
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B(CallProperty0), R(12), R(4), U8(15),
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B(JumpIfJSReceiver), U8(21),
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B(Star), R(14),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(14), U8(1),
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B(Jump), U8(12),
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B(Star), R(13),
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B(LdaZero),
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B(TestReferenceEqual), R(8),
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B(JumpIfTrue), U8(5),
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B(Ldar), R(13),
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B(ReThrow),
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B(Ldar), R(10),
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B(SetPendingMessage),
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B(LdaZero),
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B(TestReferenceEqual), R(8),
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B(JumpIfFalse), U8(5),
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B(Ldar), R(9),
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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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SYMBOL_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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EMPTY_STRING_TYPE [""],
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]
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handlers: [
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[44, 86, 94],
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[140, 153, 155],
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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: 16
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parameter count: 1
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bytecode array length: 264
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bytecodes: [
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/* 30 E> */ B(StackCheck),
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/* 48 S> */ B(CreateArrayLiteral), U8(0), U8(0), U8(37),
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B(Star), R(2),
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/* 69 S> */ B(LdaNamedProperty), R(2), U8(1), U8(1),
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B(Star), R(7),
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B(CallProperty0), R(7), R(2), U8(3),
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B(Mov), R(2), R(6),
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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(Star), R(5),
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B(LdaNamedProperty), R(5), U8(2), U8(5),
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B(Star), R(4),
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B(LdaFalse),
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B(Star), R(8),
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B(Mov), R(context), R(11),
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B(Ldar), R(8),
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B(JumpIfToBooleanTrue), U8(35),
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B(LdaTrue),
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B(Star), R(8),
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B(CallProperty0), R(4), R(5), U8(11),
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B(Star), R(12),
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B(JumpIfJSReceiver), U8(7),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(12), U8(1),
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B(LdaNamedProperty), R(12), U8(3), U8(9),
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B(JumpIfToBooleanTrue), U8(13),
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B(LdaNamedProperty), R(12), U8(4), U8(7),
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B(Star), R(12),
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B(LdaFalse),
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B(Star), R(8),
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B(Ldar), R(12),
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/* 61 S> */ B(Ldar), R(8),
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B(JumpIfToBooleanTrue), U8(37),
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B(LdaTrue),
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B(Star), R(8),
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B(CallProperty0), R(4), R(5), U8(13),
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B(Star), R(12),
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B(JumpIfJSReceiver), U8(7),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(12), U8(1),
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B(LdaNamedProperty), R(12), U8(3), U8(9),
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B(JumpIfToBooleanTrue), U8(15),
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B(LdaNamedProperty), R(12), U8(4), U8(7),
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B(Star), R(12),
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B(LdaFalse),
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B(Star), R(8),
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B(Ldar), R(12),
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B(Jump), U8(3),
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B(LdaUndefined),
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B(Star), R(0),
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/* 63 S> */ B(CreateEmptyArrayLiteral), U8(15),
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B(Star), R(13),
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B(LdaZero),
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B(Star), R(14),
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B(LdaTrue),
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B(Star), R(8),
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B(CallProperty0), R(4), R(5), U8(19),
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B(Star), R(12),
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B(JumpIfJSReceiver), U8(7),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(12), U8(1),
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B(LdaNamedProperty), R(12), U8(3), U8(21),
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B(JumpIfToBooleanTrue), U8(19),
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B(LdaNamedProperty), R(12), U8(4), U8(7),
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B(StaInArrayLiteral), R(13), R(14), U8(16),
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B(Ldar), R(14),
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B(Inc), U8(18),
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B(Star), R(14),
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B(JumpLoop), U8(33), I8(0),
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B(Mov), R(13), R(1),
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B(LdaSmi), I8(-1),
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B(Star), R(10),
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B(Star), R(9),
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B(Jump), U8(7),
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B(Star), R(10),
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B(LdaZero),
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B(Star), R(9),
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B(LdaTheHole),
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B(SetPendingMessage),
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B(Star), R(11),
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B(Ldar), R(8),
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B(JumpIfToBooleanTrue), U8(60),
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B(LdaNamedProperty), R(5), U8(5), U8(23),
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B(Star), R(13),
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B(JumpIfUndefined), U8(52),
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B(JumpIfNull), U8(50),
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B(TestTypeOf), U8(6),
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B(JumpIfTrue), U8(18),
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B(Wide), B(LdaSmi), I16(155),
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B(Star), R(14),
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B(LdaConstant), U8(6),
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B(Star), R(15),
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B(CallRuntime), U16(Runtime::kNewTypeError), R(14), U8(2),
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B(Throw),
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B(Mov), R(context), R(14),
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B(CallProperty0), R(13), R(5), U8(25),
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B(JumpIfJSReceiver), U8(21),
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B(Star), R(15),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(15), U8(1),
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B(Jump), U8(12),
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B(Star), R(14),
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B(LdaZero),
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B(TestReferenceEqual), R(9),
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B(JumpIfTrue), U8(5),
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B(Ldar), R(14),
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B(ReThrow),
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B(Ldar), R(11),
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B(SetPendingMessage),
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B(LdaZero),
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B(TestReferenceEqual), R(9),
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B(JumpIfFalse), U8(5),
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B(Ldar), R(10),
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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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SYMBOL_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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EMPTY_STRING_TYPE [""],
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]
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handlers: [
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[44, 172, 180],
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[226, 239, 241],
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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: 17
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parameter count: 1
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bytecode array length: 229
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bytecodes: [
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/* 30 E> */ B(StackCheck),
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/* 40 S> */ B(CreateEmptyObjectLiteral),
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B(Star), R(0),
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/* 51 S> */ B(CreateArrayLiteral), U8(0), U8(0), U8(37),
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B(Star), R(2),
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/* 68 S> */ B(LdaNamedProperty), R(2), U8(1), U8(1),
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B(Star), R(7),
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B(CallProperty0), R(7), R(2), U8(3),
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B(Mov), R(2), R(6),
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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(Star), R(5),
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B(LdaNamedProperty), R(5), U8(2), U8(5),
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B(Star), R(4),
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B(LdaFalse),
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B(Star), R(8),
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B(Mov), R(context), R(11),
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/* 59 S> */ B(Ldar), R(8),
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B(Mov), R(0), R(13),
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B(JumpIfToBooleanTrue), U8(37),
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B(LdaTrue),
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B(Star), R(8),
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B(CallProperty0), R(4), R(5), U8(11),
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B(Star), R(12),
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B(JumpIfJSReceiver), U8(7),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(12), U8(1),
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B(LdaNamedProperty), R(12), U8(3), U8(9),
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B(JumpIfToBooleanTrue), U8(15),
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B(LdaNamedProperty), R(12), U8(4), U8(7),
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B(Star), R(12),
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B(LdaFalse),
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B(Star), R(8),
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B(Ldar), R(12),
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B(Jump), U8(3),
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B(LdaUndefined),
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B(StaNamedProperty), R(13), U8(5), U8(13),
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/* 63 S> */ B(Ldar), R(8),
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B(JumpIfToBooleanTrue), U8(37),
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B(LdaTrue),
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B(Star), R(8),
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B(CallProperty0), R(4), R(5), U8(15),
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B(Star), R(12),
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B(JumpIfJSReceiver), U8(7),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(12), U8(1),
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B(LdaNamedProperty), R(12), U8(3), U8(9),
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B(JumpIfToBooleanTrue), U8(15),
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B(LdaNamedProperty), R(12), U8(4), U8(7),
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B(Star), R(12),
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B(LdaFalse),
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B(Star), R(8),
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B(Ldar), R(12),
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B(JumpIfNotUndefined), U8(4),
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B(LdaSmi), I8(4),
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B(Star), R(1),
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B(LdaSmi), I8(-1),
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B(Star), R(10),
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B(Star), R(9),
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B(Jump), U8(7),
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B(Star), R(10),
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B(LdaZero),
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B(Star), R(9),
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B(LdaTheHole),
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B(SetPendingMessage),
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B(Star), R(11),
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B(Ldar), R(8),
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B(JumpIfToBooleanTrue), U8(60),
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B(LdaNamedProperty), R(5), U8(6), U8(17),
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B(Star), R(14),
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B(JumpIfUndefined), U8(52),
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B(JumpIfNull), U8(50),
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B(TestTypeOf), U8(6),
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B(JumpIfTrue), U8(18),
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B(Wide), B(LdaSmi), I16(155),
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B(Star), R(15),
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B(LdaConstant), U8(7),
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B(Star), R(16),
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B(CallRuntime), U16(Runtime::kNewTypeError), R(15), U8(2),
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B(Throw),
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B(Mov), R(context), R(15),
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B(CallProperty0), R(14), R(5), U8(19),
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B(JumpIfJSReceiver), U8(21),
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B(Star), R(16),
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B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(16), U8(1),
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B(Jump), U8(12),
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B(Star), R(15),
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B(LdaZero),
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B(TestReferenceEqual), R(9),
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B(JumpIfTrue), U8(5),
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B(Ldar), R(15),
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B(ReThrow),
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B(Ldar), R(11),
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B(SetPendingMessage),
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B(LdaZero),
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B(TestReferenceEqual), R(9),
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B(JumpIfFalse), U8(5),
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B(Ldar), R(10),
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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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SYMBOL_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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EMPTY_STRING_TYPE [""],
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]
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handlers: [
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[47, 137, 145],
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[191, 204, 206],
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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: 3
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parameter count: 1
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bytecode array length: 26
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bytecodes: [
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/* 30 E> */ B(StackCheck),
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/* 45 S> */ B(CreateObjectLiteral), U8(0), U8(0), U8(41),
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B(Star), R(1),
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/* 52 S> */ B(JumpIfNull), U8(4),
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B(JumpIfNotUndefined), U8(7),
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/* 53 E> */ B(CallRuntime), U16(Runtime::kThrowPatternAssignmentNonCoercible), R(0), U8(0),
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B(Star), R(2),
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/* 54 S> */ B(LdaNamedProperty), R(2), U8(1), U8(1),
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B(Star), R(0),
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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: [
|
|
]
|
|
|
|
---
|
|
snippet: "
|
|
var x={}, a = {y:1};
|
|
({y:x.foo} = a);
|
|
"
|
|
frame size: 3
|
|
parameter count: 1
|
|
bytecode array length: 31
|
|
bytecodes: [
|
|
/* 30 E> */ B(StackCheck),
|
|
/* 40 S> */ B(CreateEmptyObjectLiteral),
|
|
B(Star), R(0),
|
|
/* 48 S> */ B(CreateObjectLiteral), U8(0), U8(0), U8(41),
|
|
B(Star), R(1),
|
|
/* 55 S> */ B(JumpIfNull), U8(4),
|
|
B(JumpIfNotUndefined), U8(7),
|
|
/* 56 E> */ B(CallRuntime), U16(Runtime::kThrowPatternAssignmentNonCoercible), R(0), U8(0),
|
|
/* 61 S> */ B(Star), R(2),
|
|
B(LdaNamedProperty), R(2), U8(1), U8(1),
|
|
B(StaNamedProperty), R(0), U8(2), U8(3),
|
|
B(LdaUndefined),
|
|
/* 72 S> */ B(Return),
|
|
]
|
|
constant pool: [
|
|
OBJECT_BOILERPLATE_DESCRIPTION_TYPE,
|
|
ONE_BYTE_INTERNALIZED_STRING_TYPE ["y"],
|
|
ONE_BYTE_INTERNALIZED_STRING_TYPE ["foo"],
|
|
]
|
|
handlers: [
|
|
]
|
|
|
|
---
|
|
snippet: "
|
|
var x, a = {y:1, w:2, v:3};
|
|
({x=0,...y} = a);
|
|
"
|
|
frame size: 4
|
|
parameter count: 1
|
|
bytecode array length: 41
|
|
bytecodes: [
|
|
/* 30 E> */ B(StackCheck),
|
|
/* 45 S> */ B(CreateObjectLiteral), U8(0), U8(0), U8(41),
|
|
B(Star), R(1),
|
|
/* 62 S> */ B(JumpIfNull), U8(4),
|
|
B(JumpIfNotUndefined), U8(7),
|
|
/* 63 E> */ B(CallRuntime), U16(Runtime::kThrowPatternAssignmentNonCoercible), R(0), U8(0),
|
|
B(Star), R(2),
|
|
/* 64 S> */ B(LdaConstant), U8(1),
|
|
B(Star), R(3),
|
|
B(LdaNamedProperty), R(2), U8(1), U8(1),
|
|
B(JumpIfNotUndefined), U8(3),
|
|
B(LdaZero),
|
|
B(Star), R(0),
|
|
/* 71 S> */ B(CallRuntime), U16(Runtime::kCopyDataPropertiesWithExcludedProperties), R(2), U8(2),
|
|
B(StaGlobal), U8(2), U8(3),
|
|
B(LdaUndefined),
|
|
/* 80 S> */ B(Return),
|
|
]
|
|
constant pool: [
|
|
OBJECT_BOILERPLATE_DESCRIPTION_TYPE,
|
|
ONE_BYTE_INTERNALIZED_STRING_TYPE ["x"],
|
|
ONE_BYTE_INTERNALIZED_STRING_TYPE ["y"],
|
|
]
|
|
handlers: [
|
|
]
|
|
|