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remove-unused-brs_shrink-level=1.wast
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remove-unused-brs_shrink-level=1.wast
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(module
(memory 256 256)
(type $0 (func (param i32)))
(type $1 (func))
(type $2 (func (result i32)))
(func $b14 (type $2)
(drop
(if (result i32) ;; with shrinking, this can become a select
(i32.const 1)
(block $block1 (result i32)
(i32.const 12)
)
(block $block3 (result i32)
(i32.const 27)
)
)
)
(drop
(if (result i32)
(i32.const 1)
(i32.load (i32.const 10)) ;; load may have side effects, unless ignored
(i32.const 27)
)
)
(drop
(if (result i32)
(i32.const 1)
(i32.rem_s (i32.const 11) (i32.const 12)) ;; rem may have side effects, unless ignored
(i32.const 27)
)
)
(drop
(if (result i32)
(i32.const 1)
(i32.trunc_u/f64 (f64.const 12.34)) ;; float to int may have side effects, unless ignored
(i32.const 27)
)
)
(i32.const 0)
)
(func $join-br_ifs
(block $out
(br_if $out (i32.const 1))
(br_if $out (i32.const 2))
(br_if $out (i32.const 3))
)
(block $out2
(block $out3
(br_if $out2 (i32.const 1))
(br_if $out3 (i32.const 2))
(br_if $out2 (i32.const 3))
)
(unreachable)
)
(block $out4
(block $out5
(br_if $out4 (i32.const 1))
(br_if $out5 (i32.const 2))
(br_if $out5 (i32.const 3))
)
(unreachable)
)
(block $out6
(block $out7
(br_if $out6 (i32.const 1))
(br_if $out6 (i32.const 2))
(br_if $out7 (i32.const 3))
)
(unreachable)
)
(block $out8
(br_if $out8 (call $b14)) ;; side effect
(br_if $out8 (i32.const 0))
)
(block $out8
(br_if $out8 (i32.const 1))
(br_if $out8 (call $b14)) ;; side effect
)
)
(func $join-and-it-becomes-unreachable
(block $label$1
(block
(br_if $label$1
(i32.load8_u
(i32.const -93487262)
)
)
(br_if $label$1
(loop $label$5 ;; this is unreachable (infinite loop, no exit)
(br $label$5)
)
)
)
)
)
(func $br-if-unreachable-pair
(block $label$14
(br_if $label$14
(unreachable)
)
(br_if $label$14
(i32.const 0)
)
)
)
(func $br-if-unreachable-pair2
(block $label$14
(br_if $label$14
(i32.const 0)
)
(br_if $label$14
(unreachable)
)
)
)
(func $simple-switch (result i32)
(block $A
(block $B
(block $y
(br_table $A $y $y $y $y $y $A $y $y $y $y $A $y
(i32.const 0)
)
(return (i32.const 0))
)
(return (i32.const 1))
)
(return (i32.const 2))
)
(return (i32.const 3))
)
(func $simple-switch-2 (result i32)
(block $A
(block $B
(block $y
(br_table $A $y $y $y $y $y $y $y $y $y $y $y $A $y
(i32.const 0)
)
(return (i32.const 0))
)
(return (i32.const 1))
)
(return (i32.const 2))
)
(return (i32.const 3))
)
(func $simple-switch-3 (result i32)
(block $A
(block $B
(block $y
(br_table $A $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $y $B $y
(i32.const 0)
)
(return (i32.const 0))
)
(return (i32.const 1))
)
(return (i32.const 2))
)
(return (i32.const 3))
)
(func $simple-switch-4 (result i32)
(block $A
(block $B
(block $y
(br_table $A $y $y $y $y $y $A $y $y $y $y $y $A $y
(i32.const 0)
)
(return (i32.const 0))
)
(return (i32.const 1))
)
(return (i32.const 2))
)
(return (i32.const 3))
)
)