mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-05-13 02:16:52 +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.
241 lines
5.5 KiB
Plaintext
241 lines
5.5 KiB
Plaintext
$3522b97e try-finally.js:8:1
|
|
Registers: 8
|
|
Blocks: 1
|
|
Constants:
|
|
[0] = Undefined
|
|
|
|
block0:
|
|
[ 0] GetGlobal dst:reg6, `basicTryFinally`
|
|
[ 18] Call dst:reg5, callee:reg6, this_value:Undefined, basicTryFinally
|
|
[ 38] GetGlobal dst:reg7, `breakThroughFinally`
|
|
[ 50] Call dst:reg6, callee:reg7, this_value:Undefined, breakThroughFinally
|
|
[ 70] GetGlobal dst:reg7, `nestedTryFinallyWithBreak`
|
|
[ 88] Call dst:reg5, callee:reg7, this_value:Undefined, nestedTryFinallyWithBreak
|
|
[ a8] End value:reg5
|
|
|
|
|
|
basicTryFinally$06bcb6b7 try-finally.js:2:5
|
|
Registers: 10
|
|
Blocks: 8
|
|
Constants:
|
|
[0] = Int32(1)
|
|
[1] = Int32(2)
|
|
[2] = String("finally")
|
|
[3] = Int32(0)
|
|
[4] = Undefined
|
|
|
|
block0:
|
|
[ 0] GetLexicalEnvironment dst:reg4
|
|
[ 8] Jump target:block3
|
|
|
|
block1:
|
|
[ 10] Catch dst:reg6
|
|
[ 18] SetLexicalEnvironment environment:reg4
|
|
[ 20] Mov dst:reg5, src:Int32(1)
|
|
|
|
block2:
|
|
[ 30] GetGlobal dst:reg8, `console`
|
|
[ 48] GetById dst:reg9, base:reg8, `log` (console.log)
|
|
[ 68] Call dst:reg7, callee:reg9, this_value:reg8, console.log, arguments:[String("finally")]
|
|
[ 90] JumpStrictlyEquals lhs:reg5, rhs:Int32(0), true_target:block4, false_target:block5
|
|
|
|
block3:
|
|
[ a8] Mov2 dst1:reg6, src1:Int32(1), dst2:reg5, src2:Int32(2)
|
|
[ c0] Jump target:block2
|
|
|
|
block4:
|
|
[ c8] End value:Undefined
|
|
|
|
block5:
|
|
[ d0] JumpStrictlyEquals lhs:reg5, rhs:Int32(2), true_target:block6, false_target:block7
|
|
|
|
block6:
|
|
[ e8] Return value:reg6
|
|
|
|
block7:
|
|
[ f0] Throw src:reg6
|
|
|
|
Exception handlers:
|
|
[ a8 .. c8] => handler block1
|
|
|
|
|
|
breakThroughFinally$a2a426c4 try-finally.js:11:5
|
|
Registers: 11
|
|
Blocks: 15
|
|
Locals: i~0
|
|
Constants:
|
|
[0] = Int32(0)
|
|
[1] = Int32(10)
|
|
[2] = Int32(1)
|
|
[3] = Int32(5)
|
|
[4] = Int32(3)
|
|
[5] = Int32(2)
|
|
[6] = Undefined
|
|
|
|
block0:
|
|
[ 0] GetLexicalEnvironment dst:reg4
|
|
[ 8] Mov dst:i~0, src:Int32(0)
|
|
[ 18] Jump target:block3
|
|
|
|
block1:
|
|
[ 20] Jump target:block7
|
|
|
|
block2:
|
|
[ 28] PostfixIncrement dst:reg5, src:i~0
|
|
|
|
block3:
|
|
[ 38] JumpLessThan lhs:i~0, rhs:Int32(10), true_target:block1, false_target:block4
|
|
|
|
block4:
|
|
[ 50] End value:Undefined
|
|
|
|
block5:
|
|
[ 58] Catch dst:reg6
|
|
[ 60] SetLexicalEnvironment environment:reg4
|
|
[ 68] Mov dst:reg5, src:Int32(1)
|
|
|
|
block6:
|
|
[ 78] GetGlobal dst:reg8, `console`
|
|
[ 90] GetById dst:reg9, base:reg8, `log` (console.log)
|
|
[ b0] Mov dst:reg10, src:i~0
|
|
[ c0] Call dst:reg7, callee:reg9, this_value:reg8, console.log, arguments:[reg10]
|
|
[ e8] JumpStrictlyEquals lhs:reg5, rhs:Int32(0), true_target:block10, false_target:block11
|
|
|
|
block7:
|
|
[ 100] JumpStrictlyEquals lhs:i~0, rhs:Int32(5), true_target:block8, false_target:block9
|
|
|
|
block8:
|
|
[ 118] Mov dst:reg5, src:Int32(3)
|
|
[ 128] Jump target:block6
|
|
|
|
block9:
|
|
[ 130] Mov dst:reg5, src:Int32(0)
|
|
[ 140] Jump target:block6
|
|
|
|
block10:
|
|
[ 148] Jump target:block2
|
|
|
|
block11:
|
|
[ 150] JumpStrictlyEquals lhs:reg5, rhs:Int32(3), true_target:block4, false_target:block12
|
|
|
|
block12:
|
|
[ 168] JumpStrictlyEquals lhs:reg5, rhs:Int32(2), true_target:block13, false_target:block14
|
|
|
|
block13:
|
|
[ 180] Return value:reg6
|
|
|
|
block14:
|
|
[ 188] Throw src:reg6
|
|
|
|
Exception handlers:
|
|
[ 100 .. 148] => handler block5
|
|
|
|
|
|
nestedTryFinallyWithBreak$aa8999b1 try-finally.js:22:12
|
|
Registers: 12
|
|
Blocks: 21
|
|
Locals: i~0
|
|
Constants:
|
|
[0] = Int32(0)
|
|
[1] = Int32(1)
|
|
[2] = Int32(3)
|
|
[3] = String("inner")
|
|
[4] = Int32(2)
|
|
[5] = Undefined
|
|
[6] = String("outer")
|
|
|
|
block0:
|
|
[ 0] GetLexicalEnvironment dst:reg4
|
|
[ 8] Mov dst:i~0, src:Int32(0)
|
|
|
|
block1:
|
|
[ 18] Jump target:block6
|
|
|
|
block2:
|
|
[ 20] PostfixIncrement dst:reg5, src:i~0
|
|
[ 30] Jump target:block1
|
|
|
|
block3:
|
|
[ 38] End value:Undefined
|
|
|
|
block4:
|
|
[ 40] Catch dst:reg6
|
|
[ 48] SetLexicalEnvironment environment:reg4
|
|
[ 50] Mov dst:reg5, src:Int32(1)
|
|
|
|
block5:
|
|
[ 60] GetGlobal dst:reg8, `console`
|
|
[ 78] GetById dst:reg9, base:reg8, `log` (console.log)
|
|
[ 98] Call dst:reg7, callee:reg9, this_value:reg8, console.log, arguments:[String("outer")]
|
|
[ c0] JumpStrictlyEquals lhs:reg5, rhs:Int32(0), true_target:block16, false_target:block17
|
|
|
|
block6:
|
|
[ d8] Jump target:block9
|
|
|
|
block7:
|
|
[ e0] Catch dst:reg8
|
|
[ e8] SetLexicalEnvironment environment:reg4
|
|
[ f0] Mov dst:reg7, src:Int32(1)
|
|
|
|
block8:
|
|
[ 100] GetGlobal dst:reg10, `console`
|
|
[ 118] GetById dst:reg11, base:reg10, `log` (console.log)
|
|
[ 138] Call dst:reg9, callee:reg11, this_value:reg10, console.log, arguments:[String("inner")]
|
|
[ 160] JumpStrictlyEquals lhs:reg7, rhs:Int32(0), true_target:block11, false_target:block12
|
|
|
|
block9:
|
|
[ 178] Mov dst:reg7, src:Int32(3)
|
|
[ 188] Jump target:block8
|
|
|
|
block10:
|
|
[ 190] Mov dst:reg5, src:Int32(3)
|
|
[ 1a0] Jump target:block5
|
|
|
|
block11:
|
|
[ 1a8] Mov dst:reg5, src:Int32(0)
|
|
[ 1b8] Jump target:block5
|
|
|
|
block12:
|
|
[ 1c0] JumpStrictlyEquals lhs:reg7, rhs:Int32(3), true_target:block10, false_target:block13
|
|
|
|
block13:
|
|
[ 1d8] JumpStrictlyEquals lhs:reg7, rhs:Int32(2), true_target:block14, false_target:block15
|
|
|
|
block14:
|
|
[ 1f0] Mov2 dst1:reg5, src1:reg7, dst2:reg6, src2:reg8
|
|
[ 208] Jump target:block5
|
|
|
|
block15:
|
|
[ 210] Throw src:reg8
|
|
|
|
block16:
|
|
[ 218] Jump target:block2
|
|
|
|
block17:
|
|
[ 220] JumpStrictlyEquals lhs:reg5, rhs:Int32(3), true_target:block3, false_target:block18
|
|
|
|
block18:
|
|
[ 238] JumpStrictlyEquals lhs:reg5, rhs:Int32(2), true_target:block19, false_target:block20
|
|
|
|
block19:
|
|
[ 250] Return value:reg6
|
|
|
|
block20:
|
|
[ 258] Throw src:reg6
|
|
|
|
Exception handlers:
|
|
[ d8 .. 178] => handler block4
|
|
[ 178 .. 1a8] => handler block7
|
|
[ 1a8 .. 218] => handler block4
|
|
|
|
|
|
"finally"
|
|
0
|
|
1
|
|
2
|
|
3
|
|
4
|
|
5
|
|
"inner"
|
|
"outer"
|