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|
(module
(type $i (func (param i32) (result i32)))
(memory $0 1 100)
(export "sieve" (func $sieve))
(func $sieve (; 0 ;) (type $i) (param $0 i32) (result i32)
(local $1 i32)
(if
(i32.lt_u
(i32.mul
(current_memory)
(i32.const 65536)
)
(get_local $0)
)
(drop
(grow_memory
(i32.sub
(i32.div_u
(i32.add
(get_local $0)
(i32.const 65535)
)
(i32.const 65536)
)
(current_memory)
)
)
)
)
(set_local $1
(i32.const 0)
)
(loop $clear
(i32.store8
(get_local $1)
(i32.const 0)
)
(set_local $1
(i32.add
(get_local $1)
(i32.const 1)
)
)
(br_if $clear
(i32.eq
(get_local $1)
(get_local $0)
)
)
)
(return
(get_local $0)
)
)
)
optimized:
(module
(type $i (func (param i32) (result i32)))
(memory $0 1 100)
(export "sieve" (func $sieve))
(func $sieve (; 0 ;) (; has Stack IR ;) (type $i) (param $0 i32) (result i32)
(local $1 i32)
(if
(i32.lt_u
(i32.shl
(current_memory)
(i32.const 16)
)
(get_local $0)
)
(drop
(grow_memory
(i32.sub
(i32.div_u
(i32.add
(get_local $0)
(i32.const 65535)
)
(i32.const 65536)
)
(current_memory)
)
)
)
)
(loop $clear
(i32.store8
(get_local $1)
(i32.const 0)
)
(br_if $clear
(i32.eq
(tee_local $1
(i32.add
(get_local $1)
(i32.const 1)
)
)
(get_local $0)
)
)
)
(get_local $0)
)
)
|
