c48096d442
This is a reland of c07c02e1c4
Original change's description:
> [runtime] Remove extension slots from context objects
>
> Context objects have an extension slot, which contains further
> additional data that depends on the type of the context.
>
> This CL removes the extension slot from contexts that don't need
> them, hence reducing memory.
>
> The following contexts will still have an extension slot: native,
> module, await, block and with contexts. See objects/contexts.h for
> what the slot is used for.
> The following contexts will not have an extension slot anymore (they
> were not used before): script, catch and builtin contexts.
> Eval and function contexts only have the extension slot if they
> contain a sloppy eval.
>
> Bug: v8:9744
> Change-Id: I8ca56c22fa02437bbac392ea72174ebfca80e030
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1863191
> Commit-Queue: Victor Gomes <victorgomes@google.com>
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Peter Marshall <petermarshall@chromium.org>
> Auto-Submit: Victor Gomes <victorgomes@google.com>
> Cr-Commit-Position: refs/heads/master@{#64372}
TBR=verwaest@chromium.org,jgruber@chromium.org,ulan@chromium.org,leszeks@chromium.org,petermarshall@chromium.org
Bug: v8:9744
Change-Id: I0749cc2d8f59940c25841736634a70047116d647
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1869192
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Auto-Submit: Victor Gomes <victorgomes@google.com>
Cr-Commit-Position: refs/heads/master@{#64380}
112 lines
2.5 KiB
Plaintext
112 lines
2.5 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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let x = 10; function f1() {return x;}
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"
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frame size: 1
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parameter count: 1
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bytecode array length: 15
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bytecodes: [
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B(CreateFunctionContext), U8(0), U8(1),
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B(PushContext), R(0),
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B(LdaTheHole),
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B(StaCurrentContextSlot), U8(2),
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/* 30 E> */ B(StackCheck),
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/* 42 S> */ B(LdaSmi), I8(10),
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/* 42 E> */ B(StaCurrentContextSlot), U8(2),
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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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SCOPE_INFO_TYPE,
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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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let x = 10; function f1() {return x;} return x;
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"
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frame size: 1
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parameter count: 1
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bytecode array length: 16
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bytecodes: [
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B(CreateFunctionContext), U8(0), U8(1),
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B(PushContext), R(0),
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B(LdaTheHole),
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B(StaCurrentContextSlot), U8(2),
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/* 30 E> */ B(StackCheck),
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/* 42 S> */ B(LdaSmi), I8(10),
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/* 42 E> */ B(StaCurrentContextSlot), U8(2),
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/* 72 S> */ B(LdaImmutableCurrentContextSlot), U8(2),
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/* 81 S> */ B(Return),
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]
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constant pool: [
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SCOPE_INFO_TYPE,
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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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let x = (x = 20); function f1() {return x;}
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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: 25
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bytecodes: [
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B(CreateFunctionContext), U8(0), U8(1),
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B(PushContext), R(0),
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B(LdaTheHole),
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B(StaCurrentContextSlot), U8(2),
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/* 30 E> */ B(StackCheck),
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/* 42 S> */ B(LdaSmi), I8(20),
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B(Star), R(1),
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B(LdaCurrentContextSlot), U8(2),
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/* 45 E> */ B(ThrowReferenceErrorIfHole), U8(1),
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B(Ldar), R(1),
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B(StaCurrentContextSlot), U8(2),
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/* 42 E> */ B(StaCurrentContextSlot), U8(2),
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B(LdaUndefined),
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/* 78 S> */ B(Return),
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]
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constant pool: [
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SCOPE_INFO_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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let x = 10; x = 20; function f1() {return x;}
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"
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frame size: 1
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parameter count: 1
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bytecode array length: 19
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bytecodes: [
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B(CreateFunctionContext), U8(0), U8(1),
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B(PushContext), R(0),
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B(LdaTheHole),
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B(StaCurrentContextSlot), U8(2),
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/* 30 E> */ B(StackCheck),
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/* 42 S> */ B(LdaSmi), I8(10),
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/* 42 E> */ B(StaCurrentContextSlot), U8(2),
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/* 46 S> */ B(LdaSmi), I8(20),
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/* 48 E> */ B(StaCurrentContextSlot), U8(2),
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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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SCOPE_INFO_TYPE,
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]
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handlers: [
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]
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