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60 lines
1.9 KiB
60 lines
1.9 KiB
import { expect } from "chai"
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import { edgeConnects } from "../lib/data/graph"
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import { Loc } from "../lib/ir/loc"
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import { AbsInsn2, CopyInsn, UnaryInsn } from "../lib/ir/insn"
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import { allocateRegisters, interference, liveness } from "../lib/regalloc"
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import { R8 } from "../lib/sm83/cpu"
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import { BasicBlock } from "../lib/ir/block"
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describe("liveness", () => {
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it("computes liveness", () => {
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const x = [0, 1, 2].map(i => Loc.vari("x" + i))
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const y = [0, 1].map(i => Loc.vari("y" + i))
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const block = new BasicBlock([
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CopyInsn(x[0], 1),
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UnaryInsn(x[1], "add", x[0]),
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UnaryInsn(x[2], "add", x[1]),
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UnaryInsn(y[0], "add", x[0]),
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UnaryInsn(y[1], "add", y[0]),
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])
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const info = liveness(block)
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/* expect(info[0]).to.deep.equal(new Set())
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expect(info[1]).to.deep.equal(new Set([x[0]]))
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expect(info[2]).to.deep.equal(new Set([x[0], x[1]]))
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expect(info[3]).to.deep.equal(new Set([x[0], x[1], x[2]]))
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expect(info[4]).to.deep.equal(new Set([y[0], x[2]])) */
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})
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})
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describe("interference", () => {
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it("computes interference", () => {
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const block: BasicBlock = new BasicBlock([
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CopyInsn(Loc.vari("a"), 7),
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CopyInsn(Loc.vari("b"), 3),
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CopyInsn(Loc.vari("x"), Loc.vari("a")),
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])
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const info = liveness(block)
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const g = interference(block, info)
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expect(edgeConnects(g, "a", "b")).to.be.true
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})
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})
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describe("allocateRegisters", () => {
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it("allocates registers", () => {
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const block: BasicBlock = new BasicBlock([
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CopyInsn(Loc.vari("a"), 7),
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CopyInsn(Loc.vari("b"), 3),
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CopyInsn(Loc.vari("x"), Loc.vari("a")),
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])
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const alloc = allocateRegisters(block, Object.values(R8))
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expect(alloc.a).to.equal("A")
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expect(alloc.b).to.equal("B")
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expect(alloc.x).to.equal("A")
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})
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})
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