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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.
51 lines
1.1 KiB
Plaintext
51 lines
1.1 KiB
Plaintext
$b4733eed invalid-lhs-assignment-no-dead-code.js:1:1
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Registers: 10
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Blocks: 4
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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] Jump target:block3
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block1:
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[ 10] Catch dst:reg5
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[ 18] SetLexicalEnvironment environment:reg4
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[ 20] Mov2 dst1:reg6, src1:Undefined, dst2:reg7, src2:reg6
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block2:
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[ 38] End value:reg6
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block3:
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[ 40] Mov dst:reg5, src:Undefined
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[ 50] GetGlobal dst:reg8, `f`
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[ 68] NewFunction dst:reg9, shared_function_data_index:0
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[ 80] Call dst:reg6, callee:reg8, this_value:Undefined, f, arguments:[reg9]
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[ a8] Mov2 dst1:reg5, src1:reg6, dst2:reg6, src2:reg5
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[ c0] End value:reg6
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Exception handlers:
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[ 40 .. c8] => handler block1
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f$36570247 invalid-lhs-assignment-no-dead-code.js:5:6
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Registers: 6
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Blocks: 1
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Constants:
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[0] = Undefined
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block0:
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[ 0] Call dst:reg5, callee:arg0, this_value:Undefined, x
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[ 20] NewReferenceError dst:reg5, Invalid left-hand side in assignment
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[ 30] Throw src:reg5
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$811c9dc5
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Registers: 5
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Blocks: 1
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Constants:
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[0] = Undefined
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block0:
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[ 0] End value:Undefined
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