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https://github.com/irmen/prog8.git
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189 lines
8.0 KiB
Kotlin
189 lines
8.0 KiB
Kotlin
import io.kotest.core.spec.style.FunSpec
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import io.kotest.matchers.shouldBe
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import prog8.code.core.*
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import prog8.code.target.VMTarget
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import prog8.codegen.intermediate.IRPeepholeOptimizer
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import prog8.intermediate.*
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class TestIRPeepholeOpt: FunSpec({
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fun makeIRProgram(chunks: List<IRCodeChunkBase>): IRProgram {
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require(chunks.first().label=="main.start")
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val block = IRBlock("main", null, IRBlock.BlockAlignment.NONE, Position.DUMMY)
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val sub = IRSubroutine("main.start", emptyList(), null, Position.DUMMY)
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chunks.forEach { sub += it }
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block += sub
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val target = VMTarget()
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val options = CompilationOptions(
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OutputType.RAW,
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CbmPrgLauncherType.NONE,
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ZeropageType.DONTUSE,
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emptyList(),
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floats = false,
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noSysInit = true,
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compTarget = target,
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loadAddress = target.machine.PROGRAM_LOAD_ADDRESS
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)
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val prog = IRProgram("test", IRSymbolTable(null), options, target)
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prog.addBlock(block)
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prog.linkChunks()
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prog.validate()
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return prog
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}
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fun makeIRProgram(instructions: List<IRInstruction>): IRProgram {
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val chunk = IRCodeChunk("main.start", null)
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instructions.forEach { chunk += it }
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return makeIRProgram(listOf(chunk))
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}
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fun IRProgram.chunks(): List<IRCodeChunkBase> = this.blocks.flatMap { it.children.filterIsInstance<IRSubroutine>() }.flatMap { it.chunks }
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test("remove nops") {
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val irProg = makeIRProgram(listOf(
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IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1=1, value=42),
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IRInstruction(Opcode.NOP),
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IRInstruction(Opcode.NOP)
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))
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irProg.chunks().single().instructions.size shouldBe 3
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val opt = IRPeepholeOptimizer(irProg)
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opt.optimize()
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irProg.chunks().single().instructions.size shouldBe 1
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}
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test("remove jmp to label below") {
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val c1 = IRCodeChunk("main.start", null)
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c1 += IRInstruction(Opcode.JUMP, labelSymbol = "label") // removed, but chunk stays because of label
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val c2 = IRCodeChunk("label", null)
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c2 += IRInstruction(Opcode.JUMP, labelSymbol = "label2") // removed, but chunk stays because of label
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c2 += IRInstruction(Opcode.NOP) // removed
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val c3 = IRCodeChunk("label2", null)
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c3 += IRInstruction(Opcode.JUMP, labelSymbol = "label3")
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c3 += IRInstruction(Opcode.INC, IRDataType.BYTE, reg1=1)
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val c4 = IRCodeChunk("label3", null)
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val irProg = makeIRProgram(listOf(c1, c2, c3, c4))
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irProg.chunks().size shouldBe 4
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irProg.chunks().flatMap { it.instructions }.size shouldBe 5
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val opt = IRPeepholeOptimizer(irProg)
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opt.optimize()
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irProg.chunks().size shouldBe 4
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irProg.chunks()[0].label shouldBe "main.start"
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irProg.chunks()[1].label shouldBe "label"
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irProg.chunks()[2].label shouldBe "label2"
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irProg.chunks()[3].label shouldBe "label3"
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irProg.chunks()[0].isEmpty() shouldBe true
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irProg.chunks()[1].isEmpty() shouldBe true
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irProg.chunks()[2].isEmpty() shouldBe false
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irProg.chunks()[3].isEmpty() shouldBe true
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val instr = irProg.chunks().flatMap { it.instructions }
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instr.size shouldBe 2
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instr[0].opcode shouldBe Opcode.JUMP
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instr[1].opcode shouldBe Opcode.INC
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}
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test("remove double sec/clc") {
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val irProg = makeIRProgram(listOf(
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IRInstruction(Opcode.SEC),
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IRInstruction(Opcode.SEC),
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IRInstruction(Opcode.SEC),
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IRInstruction(Opcode.CLC),
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IRInstruction(Opcode.CLC),
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IRInstruction(Opcode.CLC)
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))
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irProg.chunks().single().instructions.size shouldBe 6
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val opt = IRPeepholeOptimizer(irProg)
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opt.optimize()
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val instr = irProg.chunks().single().instructions
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instr.size shouldBe 1
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instr[0].opcode shouldBe Opcode.CLC
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}
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test("push followed by pop") {
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val irProg = makeIRProgram(listOf(
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IRInstruction(Opcode.PUSH, IRDataType.BYTE, reg1=42),
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IRInstruction(Opcode.POP, IRDataType.BYTE, reg1=42),
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IRInstruction(Opcode.PUSH, IRDataType.BYTE, reg1=99),
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IRInstruction(Opcode.POP, IRDataType.BYTE, reg1=222)
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))
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irProg.chunks().single().instructions.size shouldBe 4
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val opt = IRPeepholeOptimizer(irProg)
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opt.optimize()
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val instr = irProg.chunks().single().instructions
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instr.size shouldBe 1
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instr[0].opcode shouldBe Opcode.LOADR
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instr[0].reg1 shouldBe 222
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instr[0].reg2 shouldBe 99
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}
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test("remove useless div/mul, add/sub") {
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val irProg = makeIRProgram(listOf(
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IRInstruction(Opcode.DIV, IRDataType.BYTE, reg1=42, value = 1),
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IRInstruction(Opcode.DIVS, IRDataType.BYTE, reg1=42, value = 1),
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IRInstruction(Opcode.MUL, IRDataType.BYTE, reg1=42, value = 1),
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IRInstruction(Opcode.MOD, IRDataType.BYTE, reg1=42, value = 1),
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IRInstruction(Opcode.DIV, IRDataType.BYTE, reg1=42, value = 2),
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IRInstruction(Opcode.DIVS, IRDataType.BYTE, reg1=42, value = 2),
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IRInstruction(Opcode.MUL, IRDataType.BYTE, reg1=42, value = 2),
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IRInstruction(Opcode.MOD, IRDataType.BYTE, reg1=42, value = 2),
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IRInstruction(Opcode.ADD, IRDataType.BYTE, reg1=42, value = 0),
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IRInstruction(Opcode.SUB, IRDataType.BYTE, reg1=42, value = 0)
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))
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irProg.chunks().single().instructions.size shouldBe 10
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val opt = IRPeepholeOptimizer(irProg)
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opt.optimize()
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irProg.chunks().single().instructions.size shouldBe 4
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}
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test("replace add/sub 1 by inc/dec") {
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val irProg = makeIRProgram(listOf(
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IRInstruction(Opcode.ADD, IRDataType.BYTE, reg1=42, value = 1),
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IRInstruction(Opcode.SUB, IRDataType.BYTE, reg1=42, value = 1)
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))
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irProg.chunks().single().instructions.size shouldBe 2
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val opt = IRPeepholeOptimizer(irProg)
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opt.optimize()
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val instr = irProg.chunks().single().instructions
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instr.size shouldBe 2
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instr[0].opcode shouldBe Opcode.INC
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instr[1].opcode shouldBe Opcode.DEC
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}
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test("remove useless and/or/xor") {
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val irProg = makeIRProgram(listOf(
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IRInstruction(Opcode.AND, IRDataType.BYTE, reg1=42, value = 255),
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IRInstruction(Opcode.AND, IRDataType.WORD, reg1=42, value = 65535),
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IRInstruction(Opcode.OR, IRDataType.BYTE, reg1=42, value = 0),
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IRInstruction(Opcode.XOR, IRDataType.BYTE, reg1=42, value = 0),
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IRInstruction(Opcode.AND, IRDataType.BYTE, reg1=42, value = 200),
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IRInstruction(Opcode.AND, IRDataType.WORD, reg1=42, value = 60000),
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IRInstruction(Opcode.OR, IRDataType.BYTE, reg1=42, value = 1),
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IRInstruction(Opcode.XOR, IRDataType.BYTE, reg1=42, value = 1)
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))
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irProg.chunks().single().instructions.size shouldBe 8
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val opt = IRPeepholeOptimizer(irProg)
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opt.optimize()
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irProg.chunks().single().instructions.size shouldBe 4
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}
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test("replace and/or/xor by constant number") {
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val irProg = makeIRProgram(listOf(
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IRInstruction(Opcode.AND, IRDataType.BYTE, reg1=42, value = 0),
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IRInstruction(Opcode.AND, IRDataType.WORD, reg1=42, value = 0),
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IRInstruction(Opcode.OR, IRDataType.BYTE, reg1=42, value = 255),
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IRInstruction(Opcode.OR, IRDataType.WORD, reg1=42, value = 65535)
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))
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irProg.chunks().single().instructions.size shouldBe 4
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val opt = IRPeepholeOptimizer(irProg)
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opt.optimize()
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val instr = irProg.chunks().single().instructions
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instr.size shouldBe 4
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instr[0].opcode shouldBe Opcode.LOAD
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instr[1].opcode shouldBe Opcode.LOAD
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instr[2].opcode shouldBe Opcode.LOAD
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instr[3].opcode shouldBe Opcode.LOAD
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instr[0].value shouldBe 0
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instr[1].value shouldBe 0
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instr[2].value shouldBe 255
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instr[3].value shouldBe 65535
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}
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}) |