a8176a530c
Nop bytecodes are required only for break locations in debugger. Since nop bytecode doesn't change program state we can remove all of them. There are at least two changes which this CL produce: - we don't provide break position when we load local variable (still provide when load variable from global), - we don't provide break position for statements without actual break positions (e.g. "a;") - these expressions should be super rare and user always can set breakpoint before or after this statement. More details in one pager: https://docs.google.com/a/google.com/document/d/1JXlQpfMa9vRojbE272b6GMBbrfh6m_00135iAUOJEz8/edit?usp=sharing Bug: v8:6425 Change-Id: I4aee73d497a84f7b5d89caa6dda6d3060567dfda Reviewed-on: https://chromium-review.googlesource.com/543161 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Reviewed-by: Jakob Gruber <jgruber@chromium.org> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org> Cr-Commit-Position: refs/heads/master@{#46742}
92 lines
1.6 KiB
Plaintext
92 lines
1.6 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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const x = 10;
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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: 7
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bytecodes: [
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/* 30 E> */ B(StackCheck),
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/* 44 S> */ B(LdaSmi), I8(10),
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B(Star), R(0),
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B(LdaUndefined),
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/* 48 S> */ B(Return),
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]
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constant pool: [
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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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const x = 10; 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: 6
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bytecodes: [
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/* 30 E> */ B(StackCheck),
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/* 44 S> */ B(LdaSmi), I8(10),
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B(Star), R(0),
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/* 57 S> */ B(Return),
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]
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constant pool: [
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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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const x = ( x = 20);
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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: 21
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bytecodes: [
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B(LdaTheHole),
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B(Star), R(0),
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/* 30 E> */ B(StackCheck),
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/* 44 S> */ B(LdaSmi), I8(20),
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B(Star), R(1),
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B(Ldar), R(0),
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/* 48 E> */ B(ThrowReferenceErrorIfHole), U8(0),
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B(CallRuntime), U16(Runtime::kThrowConstAssignError), R(0), U8(0),
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B(Star), R(0),
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B(LdaUndefined),
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/* 55 S> */ B(Return),
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]
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constant pool: [
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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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const x = 10; x = 20;
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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: 14
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bytecodes: [
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/* 30 E> */ B(StackCheck),
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/* 44 S> */ B(LdaSmi), I8(10),
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B(Star), R(0),
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/* 48 S> */ B(LdaSmi), I8(20),
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/* 50 E> */ B(CallRuntime), U16(Runtime::kThrowConstAssignError), R(0), U8(0),
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B(LdaUndefined),
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/* 56 S> */ B(Return),
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]
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constant pool: [
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]
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handlers: [
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]
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