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Variable forwarding expression #33

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Variable forwarding expression #33

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6 changes: 5 additions & 1 deletion src/cleanup.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,11 @@ function inline_consts!(ir::IR)
isused(x) = get(us, x, 0) > 0
for v in reverse(keys(ir))
st = ir[v]
effect = effectful(exprtype.((ir,), ir[v].expr.args)...)
if typeof(st.expr) == IRTools.Inner.Variable
effect = true
else
effect = effectful(exprtype.((ir,), ir[v].expr.args)...)
end
if st.type isa Union{Const,Node} && !effect
map(v -> v isa Variable && (us[v] -= 1), st.expr.args)
if st.type isa Node || istrivial(st.type.value) || !isused(v)
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12 changes: 12 additions & 0 deletions src/infer.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -196,6 +196,18 @@ function step!(inf::Inference)
end
elseif isexpr(st.expr, :inbounds)
push!(inf.queue, (frame, b, f, ip+1))
elseif typeof(st.expr) == IRTools.Inner.Variable
if (i = findfirst(x -> x == st.expr, arguments(block))) != nothing
T = argtypes(block)[i]
elseif st.expr in stmts
T = block.ir[st.expr].type
else
error("Unrecognised variable $(st.expr)")
end
if T != Union{}
block.ir[var] = stmt(block[var], type = _union(st.type, T))
push!(inf.queue, (frame, b, f, ip+1))
end
else
error("Unrecognised expression $(st.expr)")
end
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