mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-05-05 06:32:30 +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.
57 lines
1.3 KiB
Plaintext
57 lines
1.3 KiB
Plaintext
$0b8784bc async-await-in-try-catch.js:9:1
|
|
Registers: 8
|
|
Blocks: 1
|
|
Constants:
|
|
[0] = Undefined
|
|
|
|
block0:
|
|
[ 0] GetGlobal dst:reg6, `f`
|
|
[ 18] NewObject dst:reg7
|
|
[ 28] Call dst:reg5, callee:reg6, this_value:Undefined, f, arguments:[reg7]
|
|
[ 50] End value:reg5
|
|
|
|
|
|
f$9cd82caf async-await-in-try-catch.js:2:5
|
|
Registers: 10
|
|
Blocks: 8
|
|
Locals: e~0
|
|
Constants:
|
|
[0] = Undefined
|
|
[1] = Int32(1)
|
|
|
|
block0:
|
|
[ 0] Yield continuation_label:block1, value:Undefined
|
|
|
|
block1:
|
|
[ 10] GetLexicalEnvironment dst:reg4
|
|
[ 18] Jump target:block4
|
|
|
|
block2:
|
|
[ 20] Catch dst:reg5
|
|
[ 28] SetLexicalEnvironment environment:reg4
|
|
[ 30] Mov dst:e~0, src:reg5
|
|
|
|
block3:
|
|
[ 40] Yield value:Undefined
|
|
|
|
block4:
|
|
[ 50] EnterObjectEnvironment dst:reg5, object:arg0
|
|
[ 60] Mov dst:reg6, src:reg0
|
|
[ 70] Await continuation_label:block5, argument:Int32(1)
|
|
|
|
block5:
|
|
[ 80] Mov dst:reg6, src:reg0
|
|
[ 90] GetCompletionFields type_dst:reg7, value_dst:reg8, completion:reg6
|
|
[ a0] JumpStrictlyEquals lhs:reg7, rhs:Int32(1), true_target:block6, false_target:block7
|
|
|
|
block6:
|
|
[ b8] SetLexicalEnvironment environment:reg4
|
|
[ c0] Jump target:block3
|
|
|
|
block7:
|
|
[ c8] SetLexicalEnvironment environment:reg4
|
|
[ d0] Throw src:reg8
|
|
|
|
Exception handlers:
|
|
[ 50 .. d8] => handler block2
|