mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-04-26 01:35:08 +02:00
3a08f7b95f
Teach the Rust bytecode generator to treat the synthetic entry GetLexicalEnvironment as a removable prologue load. We still model reg4 as the saved entry lexical environment during codegen, but assemble() now deletes that load when no emitted instruction refers to the saved environment register. This keeps the semantics of unwinding and environment restoration intact while letting empty functions and other simple bodies start at their first real instruction.
59 lines
1.5 KiB
Plaintext
59 lines
1.5 KiB
Plaintext
$b1c0097f var-shadow-in-default-param.js:7:1
|
|
Registers: 8
|
|
Blocks: 1
|
|
Constants:
|
|
[0] = String("outer")
|
|
[1] = Undefined
|
|
|
|
block0:
|
|
[ 0] SetGlobal `shadow`, src:String("outer")
|
|
[ 18] GetGlobal dst:reg6, `shadow_in_default`
|
|
[ 30] Call dst:reg5, callee:reg6, this_value:Undefined, shadow_in_default
|
|
[ 50] GetGlobal dst:reg7, `no_conflict`
|
|
[ 68] Call dst:reg6, callee:reg7, this_value:Undefined, no_conflict
|
|
[ 88] End value:reg6
|
|
|
|
|
|
shadow_in_default$8b450421 var-shadow-in-default-param.js:8:32
|
|
Registers: 7
|
|
Blocks: 3
|
|
Constants:
|
|
[0] = Undefined
|
|
[1] = String("inner")
|
|
|
|
block0:
|
|
[ 0] JumpUndefined condition:arg0, true_target:block1, false_target:block2
|
|
|
|
block1:
|
|
[ 10] GetInitializedBinding dst:reg5, `shadow`
|
|
[ 28] Mov dst:arg0, src:reg5
|
|
|
|
block2:
|
|
[ 38] CreateVariableEnvironment capacity:1
|
|
[ 40] GetLexicalEnvironment dst:reg5
|
|
[ 48] Mov dst:reg6, src:Undefined
|
|
[ 58] CreateVariable `shadow`, is_immutable:false, is_global:false, is_strict:false
|
|
[ 68] InitializeVariableBinding `shadow`, src:reg6
|
|
[ 80] SetLexicalBinding `shadow`, src:String("inner")
|
|
[ 98] Return value:arg0
|
|
|
|
|
|
no_conflict$0d2d606f var-shadow-in-default-param.js:17:5
|
|
Registers: 6
|
|
Blocks: 3
|
|
Locals: y~0
|
|
Constants:
|
|
[0] = Int32(1)
|
|
[1] = Undefined
|
|
[2] = Int32(2)
|
|
|
|
block0:
|
|
[ 0] JumpUndefined condition:arg0, true_target:block1, false_target:block2
|
|
|
|
block1:
|
|
[ 10] Mov dst:arg0, src:Int32(1)
|
|
|
|
block2:
|
|
[ 20] Mov3 dst1:reg5, src1:Undefined, dst2:y~0, src2:reg5, dst3:y~0, src3:Int32(2)
|
|
[ 40] Return value:y~0
|