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c301a21960
The callee and this-value preservation copies only matter while later argument expressions are still being evaluated. For zero-argument calls there is nothing left to clobber them, so we can keep the original operand and let the interpreter load it directly. This removes the hot Mov arg0->reg pattern from zero-argument local calls and reduces register pressure.
41 lines
1004 B
Plaintext
41 lines
1004 B
Plaintext
$d99dc022 block-scoped-function-no-tdz.js:10:1
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Registers: 7
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Blocks: 1
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Constants:
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[0] = String("use strict")
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[1] = Undefined
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block0:
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[ 0] GetGlobal dst:reg6, `test`
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[ 18] Call dst:reg5, callee:reg6, this_value:Undefined, test
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[ 38] End value:reg5
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test$8f4c6018 block-scoped-function-no-tdz.js:3:5
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Registers: 7
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Blocks: 1
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Locals: foo~0, result~1
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Constants:
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[0] = Undefined
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block0:
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[ 0] GetLexicalEnvironment dst:reg4
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[ 8] Mov dst:result~1, src:Undefined
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[ 18] CreateLexicalEnvironment dst:reg5, parent:reg4, capacity:0
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[ 28] NewFunction dst:reg6, shared_function_data_index:0
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[ 40] Mov dst:foo~0, src:reg6
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[ 50] Call dst:reg6, callee:foo~0, this_value:Undefined, foo
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[ 70] Mov dst:result~1, src:reg6
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[ 80] SetLexicalEnvironment environment:reg4
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[ 88] Return value:result~1
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foo$48752efa block-scoped-function-no-tdz.js:5:26
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Registers: 5
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Blocks: 1
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Constants:
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[0] = Int32(42)
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block0:
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[ 0] Return value:Int32(42)
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