b8c53b1d29
This PR removes the old ElimDeadBranches pass and shifts the new one past lambda lifting. The reason for dropping the old one is its general unsoundness and the fact that we want to do refactorings on the IR part. The reason for shifting the current pass past lambda lifting, is that its analysis is imprecise in the presence of local function symbols. I experimented with the exact placement for a while and it seems like it is optimal here. Overall we observe a slight regression in the amount of C code generated, likely because we don't propagate information into lambdas before lifting them anymore. But generally measure a slight performance improvement in general.
28 lines
830 B
Text
28 lines
830 B
Text
def myCast : NatCast UInt8 where
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natCast := UInt8.ofNat
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class Semiring (α : Type u) where
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[nsmul : SMul Nat α]
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/--
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trace: [Compiler.IR] [result]
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def instSemiringUInt8 : obj :=
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let x_1 : obj := pap instSemiringUInt8._lam_0._boxed;
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ret x_1
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def instSemiringUInt8._lam_0 (x_1 : @& tobj) (x_2 : u8) : u8 :=
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let x_3 : u8 := UInt8.ofNat x_1;
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let x_4 : u8 := UInt8.mul x_3 x_2;
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ret x_4
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def instSemiringUInt8._lam_0._boxed (x_1 : tobj) (x_2 : tagged) : tagged :=
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let x_3 : u8 := unbox x_2;
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let x_4 : u8 := instSemiringUInt8._lam_0 x_1 x_3;
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dec x_1;
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let x_5 : tagged := box x_4;
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ret x_5
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-/
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#guard_msgs in
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set_option trace.compiler.ir.result true in
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attribute [local instance] myCast UInt8.intCast in
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instance : Semiring UInt8 where
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nsmul := ⟨(· * ·)⟩
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