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[WIP] Implement live variable analysis
Signed-off-by: Adam Laszlo Kulcsar <[email protected]>
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‎asd.wast‎

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(module
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(type (;0;) (func))
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(type (;1;) (func (param i32 i32 i32)))
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(import "spectest" "print_i32" (func $print_i32 (param i32)))
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(global $max i32 (i32.const 3))
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(func $qs (type 1) (param i32 i32 i32)
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(local i32 i32 i32 i32 i32 i32 i32 i32)
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local.get 1
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local.get 2
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i32.lt_s
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if ;; label = @1
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local.get 0
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local.get 2
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i32.const 2
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i32.shl
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i32.add
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local.set 7
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loop ;; label = @2
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i32.const 0
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local.set 3
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local.get 2
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local.get 1
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i32.sub
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local.tee 8
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i32.const 0
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i32.gt_s
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if ;; label = @3
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local.get 7
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i32.load
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local.set 6
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i32.const 0
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local.set 4
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loop ;; label = @4
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block ;; label = @5
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local.get 6
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local.get 0
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local.get 1
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local.get 3
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i32.add
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i32.const 2
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i32.shl
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i32.add
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local.tee 5
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i32.load
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local.tee 9
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i32.gt_s
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if ;; label = @6
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local.get 3
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i32.const 1
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i32.add
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local.set 3
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br 1 (;@5;)
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end
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local.get 5
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local.get 0
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local.get 2
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local.get 4
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i32.sub
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i32.const 2
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i32.shl
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i32.add
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local.tee 5
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i32.const 4
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i32.sub
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local.tee 10
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i32.load
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i32.store
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local.get 5
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local.get 9
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i32.store
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local.get 10
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local.get 6
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i32.store
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local.get 4
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i32.const 1
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i32.add
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local.set 4
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end
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local.get 3
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local.get 4
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i32.add
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local.get 8
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i32.lt_s
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br_if 0 (;@4;)
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end
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end
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local.get 0
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local.get 1
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local.get 1
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local.get 3
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i32.add
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local.tee 1
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i32.const 1
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i32.sub
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call $qs
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local.get 1
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i32.const 1
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i32.add
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local.tee 1
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local.get 2
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i32.lt_s
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br_if 0 (;@2;)
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end
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end)
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(func $print (type 0)
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(local i32 i32)
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global.get $max
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local.set 1
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(loop
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local.get 0
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i32.const 4
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i32.mul
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i32.load
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call $print_i32
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local.get 0
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i32.const 1
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i32.add
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local.tee 0
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local.get 1
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i32.ne
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br_if 0
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)
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)
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(func $start (type 0)
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(local i32 i32)
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global.get $max
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local.set 1
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(loop
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local.get 0
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i32.const 4
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i32.mul
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local.get 1
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local.get 0
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i32.sub
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i32.store
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local.get 0
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i32.const 1
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i32.add
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local.tee 0
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local.get 1
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i32.ne
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br_if 0
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)
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;; call $print
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i32.const 0
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i32.const 0
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global.get $max
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call $qs
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;; call $print
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)
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(memory (;0;) 256 256)
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(start $start)
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(func (export "read") (param i32) (result i32)
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(i32.load (local.get 0))
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)
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)
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(assert_return (invoke "read" (i32.const 0)) (i32.const 0))
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(assert_return (invoke "read" (i32.const 4)) (i32.const 1))
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(assert_return (invoke "read" (i32.const 8)) (i32.const 2))

‎notes.txt‎

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normal fails:
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huffman (out of bounds memory)
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simd stuff
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sometimes stuff with jit, due to reg alloc

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