mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-04-30 19:47:17 +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.
35 lines
1.1 KiB
Plaintext
35 lines
1.1 KiB
Plaintext
$d99dc022 annexb-function-existing-var.js:10:1
|
|
Registers: 7
|
|
Blocks: 1
|
|
Constants:
|
|
[0] = Undefined
|
|
|
|
block0:
|
|
[ 0] GetGlobal dst:reg6, `test`
|
|
[ 18] Call dst:reg5, callee:reg6, this_value:Undefined, test
|
|
[ 38] End value:reg5
|
|
|
|
|
|
test$de75bc07 annexb-function-existing-var.js:2:5
|
|
Registers: 7
|
|
Blocks: 1
|
|
Constants:
|
|
[0] = Undefined
|
|
[1] = Int32(123)
|
|
[2] = Bool(true)
|
|
|
|
block0:
|
|
[ 0] GetLexicalEnvironment dst:reg4
|
|
[ 8] CreateVariable `f`, is_immutable:false, is_global:false, is_strict:false
|
|
[ 18] InitializeVariableBinding `f`, src:Undefined
|
|
[ 30] SetLexicalBinding `f`, src:Int32(123)
|
|
[ 48] CreateLexicalEnvironment dst:reg5, parent:reg4, capacity:0
|
|
[ 58] CreateMutableBinding environment:reg5, `f`, can_be_deleted:false
|
|
[ 68] NewFunction dst:reg6, shared_function_data_index:0
|
|
[ 80] InitializeLexicalBinding `f`, src:reg6
|
|
[ 98] GetBinding dst:reg6, `f`
|
|
[ b0] SetVariableBinding `f`, src:reg6
|
|
[ c8] SetLexicalEnvironment environment:reg4
|
|
[ d0] GetInitializedBinding dst:reg5, `f`
|
|
[ e8] Return value:reg5
|