package prog8tests import io.kotest.assertions.fail import io.kotest.assertions.withClue import io.kotest.core.spec.style.FunSpec import io.kotest.matchers.shouldBe import io.kotest.matchers.shouldNotBe import io.kotest.matchers.string.shouldContain import io.kotest.matchers.string.shouldNotBeBlank import io.kotest.matchers.types.instanceOf import io.kotest.matchers.types.shouldBeSameInstanceAs import prog8.ast.ParentSentinel import prog8.ast.Program import prog8.ast.expressions.* import prog8.ast.statements.* import prog8.code.core.* import prog8.code.target.C64Target import prog8.compiler.astprocessing.processAstBeforeAsmGeneration import prog8.compiler.printProgram import prog8tests.helpers.* class TestOptimization: FunSpec({ test("remove empty subroutine except start") { val sourcecode = """ main { sub start() { } sub empty() { ; going to be removed } } """ val result = compileText(C64Target(), true, sourcecode)!! val toplevelModule = result.program.toplevelModule val mainBlock = toplevelModule.statements.single() as Block val startSub = mainBlock.statements.single() as Subroutine result.program.entrypoint shouldBeSameInstanceAs startSub withClue("only start sub should remain") { startSub.name shouldBe "start" } withClue("compiler has inserted return in empty subroutines") { startSub.statements.single() shouldBe instanceOf() } } test("don't remove empty subroutine if it's referenced") { val sourcecode = """ main { sub start() { uword xx = &empty xx++ } sub empty() { ; should not be removed } } """ val result = compileText(C64Target(), true, sourcecode)!! val toplevelModule = result.program.toplevelModule val mainBlock = toplevelModule.statements.single() as Block val startSub = mainBlock.statements[0] as Subroutine val emptySub = mainBlock.statements[1] as Subroutine result.program.entrypoint shouldBeSameInstanceAs startSub startSub.name shouldBe "start" emptySub.name shouldBe "empty" withClue("compiler has inserted return in empty subroutines") { emptySub.statements.single() shouldBe instanceOf() } } test("generated constvalue from typecast inherits proper parent linkage") { val number = NumericLiteral(DataType.UBYTE, 11.0, Position.DUMMY) val tc = TypecastExpression(number, DataType.BYTE, false, Position.DUMMY) val program = Program("test", DummyFunctions, DummyMemsizer, DummyStringEncoder) tc.linkParents(ParentSentinel) tc.parent shouldNotBe null number.parent shouldNotBe null tc shouldBeSameInstanceAs number.parent val constvalue = tc.constValue(program)!! constvalue shouldBe instanceOf() constvalue.number shouldBe 11.0 constvalue.type shouldBe DataType.BYTE constvalue.parent shouldBeSameInstanceAs tc.parent } test("generated constvalue from prefixexpr inherits proper parent linkage") { val number = NumericLiteral(DataType.UBYTE, 11.0, Position.DUMMY) val pfx = PrefixExpression("-", number, Position.DUMMY) val program = Program("test", DummyFunctions, DummyMemsizer, DummyStringEncoder) pfx.linkParents(ParentSentinel) pfx.parent shouldNotBe null number.parent shouldNotBe null pfx shouldBeSameInstanceAs number.parent val constvalue = pfx.constValue(program)!! constvalue shouldBe instanceOf() constvalue.number shouldBe -11.0 constvalue.type shouldBe DataType.BYTE constvalue.parent shouldBeSameInstanceAs pfx.parent } test("const folding multiple scenarios +/-") { val source = """ main { const ubyte boardHeightC = 20 const ubyte boardOffsetC = 3 sub start() { uword load_location = 12345 word llw = 12345 cx16.r0 = load_location + 8000 + 1000 + 1000 cx16.r2 = 8000 + 1000 + 1000 + load_location cx16.r4 = load_location + boardOffsetC + boardHeightC - 1 cx16.r5s = llw - 900 - 999 cx16.r7s = llw - 900 + 999 } }""" val result = compileText(C64Target(), true, source, writeAssembly = false)!! // expected: // uword load_location // load_location = 12345 // word llw // llw = 12345 // cx16.r0 = load_location // cx16.r0 += 10000 // cx16.r2 = load_location // cx16.r2 += 10000 // cx16.r4 = load_location // cx16.r4 += 22 // cx16.r5s = llw // cx16.r5s -= 1899 // cx16.r7s = llw // cx16.r7s += 99 val stmts = result.program.entrypoint.statements stmts.size shouldBe 14 val addR0value = (stmts[5] as Assignment).value val binexpr0 = addR0value as BinaryExpression binexpr0.operator shouldBe "+" binexpr0.right shouldBe NumericLiteral(DataType.UWORD, 10000.0, Position.DUMMY) val addR2value = (stmts[7] as Assignment).value val binexpr2 = addR2value as BinaryExpression binexpr2.operator shouldBe "+" binexpr2.right shouldBe NumericLiteral(DataType.UWORD, 10000.0, Position.DUMMY) val addR4value = (stmts[9] as Assignment).value val binexpr4 = addR4value as BinaryExpression binexpr4.operator shouldBe "+" binexpr4.right shouldBe NumericLiteral(DataType.UWORD, 22.0, Position.DUMMY) val subR5value = (stmts[11] as Assignment).value val binexpr5 = subR5value as BinaryExpression binexpr5.operator shouldBe "-" binexpr5.right shouldBe NumericLiteral(DataType.UWORD, 1899.0, Position.DUMMY) val subR7value = (stmts[13] as Assignment).value val binexpr7 = subR7value as BinaryExpression binexpr7.operator shouldBe "+" binexpr7.right shouldBe NumericLiteral(DataType.UWORD, 99.0, Position.DUMMY) } test("const folding multiple scenarios * and /") { val source = """ main { sub start() { word llw = 300 cx16.r0s = 9 * 2 * 10 * llw cx16.r1s = llw * 9 * 2 * 10 cx16.r2s = llw / 30 / 3 cx16.r3s = llw / 2 * 10 cx16.r4s = llw * 90 / 5 ; not optimized because of loss of integer division precision } }""" val result = compileText(C64Target(), true, source, writeAssembly = false)!! printProgram(result.program) // expected: // word llw // llw = 300 // cx16.r0s = llw // cx16.r0s *= 180 // cx16.r1s = llw // cx16.r1s *= 180 // cx16.r2s = llw // cx16.r2s /= 90 // cx16.r3s = llw // cx16.r3s *= 5 // cx16.r4s = llw // cx16.r4s *= 90 // cx16.r4s /= 5 val stmts = result.program.entrypoint.statements stmts.size shouldBe 13 val mulR0Value = (stmts[3] as Assignment).value val binexpr0 = mulR0Value as BinaryExpression binexpr0.operator shouldBe "*" binexpr0.right shouldBe NumericLiteral(DataType.UWORD, 180.0, Position.DUMMY) val mulR1Value = (stmts[5] as Assignment).value val binexpr1 = mulR1Value as BinaryExpression binexpr1.operator shouldBe "*" binexpr1.right shouldBe NumericLiteral(DataType.UWORD, 180.0, Position.DUMMY) val divR2Value = (stmts[7] as Assignment).value val binexpr2 = divR2Value as BinaryExpression binexpr2.operator shouldBe "/" binexpr2.right shouldBe NumericLiteral(DataType.UWORD, 90.0, Position.DUMMY) val mulR3Value = (stmts[9] as Assignment).value val binexpr3 = mulR3Value as BinaryExpression binexpr3.operator shouldBe "*" binexpr3.right shouldBe NumericLiteral(DataType.UWORD, 5.0, Position.DUMMY) val mulR4Value = (stmts[11] as Assignment).value val binexpr4 = mulR4Value as BinaryExpression binexpr4.operator shouldBe "*" binexpr4.right shouldBe NumericLiteral(DataType.UWORD, 90.0, Position.DUMMY) val divR4Value = (stmts[12] as Assignment).value val binexpr4b = divR4Value as BinaryExpression binexpr4b.operator shouldBe "/" binexpr4b.right shouldBe NumericLiteral(DataType.UWORD, 5.0, Position.DUMMY) } test("constantfolded and silently typecasted for initializervalues") { val sourcecode = """ main { sub start() { const ubyte TEST = 10 byte @shared x1 = TEST as byte + 1 byte @shared x2 = 1 + TEST as byte ubyte @shared y1 = TEST + 1 as byte ubyte @shared y2 = 1 as byte + TEST } } """ val result = compileText(C64Target(), false, sourcecode)!! val mainsub = result.program.entrypoint mainsub.statements.size shouldBe 10 val declTest = mainsub.statements[0] as VarDecl val declX1 = mainsub.statements[1] as VarDecl val initX1 = mainsub.statements[2] as Assignment val declX2 = mainsub.statements[3] as VarDecl val initX2 = mainsub.statements[4] as Assignment val declY1 = mainsub.statements[5] as VarDecl val initY1 = mainsub.statements[6] as Assignment val declY2 = mainsub.statements[7] as VarDecl val initY2 = mainsub.statements[8] as Assignment mainsub.statements[9] shouldBe instanceOf() (declTest.value as NumericLiteral).number shouldBe 10.0 declX1.value shouldBe null declX2.value shouldBe null declY1.value shouldBe null declY2.value shouldBe null (initX1.value as NumericLiteral).type shouldBe DataType.BYTE (initX1.value as NumericLiteral).number shouldBe 11.0 (initX2.value as NumericLiteral).type shouldBe DataType.BYTE (initX2.value as NumericLiteral).number shouldBe 11.0 (initY1.value as NumericLiteral).type shouldBe DataType.UBYTE (initY1.value as NumericLiteral).number shouldBe 11.0 (initY2.value as NumericLiteral).type shouldBe DataType.UBYTE (initY2.value as NumericLiteral).number shouldBe 11.0 } test("not-typecasted assignment from ubyte logical expression to uword var") { val src = """ main { sub start() { ubyte bb uword ww ww = not bb or not ww ; expression combining ubyte and uword } } """ val result = compileText(C64Target(), false, src, writeAssembly = false)!! val wwAssign = result.program.entrypoint.statements.last() as Assignment val expr = wwAssign.value as BinaryExpression wwAssign.target.identifier?.nameInSource shouldBe listOf("ww") expr.inferType(result.program) istype DataType.UWORD shouldBe true } test("intermediate assignment steps have correct types for codegen phase (BeforeAsmGenerationAstChanger)") { val src = """ main { sub start() { ubyte bb uword ww bb = not bb or not ww ; expression combining ubyte and uword } } """ val result = compileText(C64Target(), false, src, writeAssembly = false)!! // bb = (( not bb as uword) or not ww) val bbAssign = result.program.entrypoint.statements.last() as Assignment val expr = bbAssign.value as BinaryExpression expr.operator shouldBe "or" expr.left shouldBe instanceOf() // casted to word expr.right shouldBe instanceOf() expr.left.inferType(result.program).getOrElse { fail("dt") } shouldBe DataType.UWORD expr.right.inferType(result.program).getOrElse { fail("dt") } shouldBe DataType.UWORD expr.inferType(result.program).getOrElse { fail("dt") } shouldBe DataType.UBYTE val options = CompilationOptions(OutputType.PRG, CbmPrgLauncherType.BASIC, ZeropageType.DONTUSE, emptyList(), floats = false, noSysInit = true, compTarget = C64Target(), loadAddress = 0u, outputDir= Helpers.outputDir) result.program.processAstBeforeAsmGeneration(options, ErrorReporterForTests()) // assignment is now split into: // bb = not bb // bb = (bb or not ww) val assigns = result.program.entrypoint.statements.filterIsInstance() val bbAssigns = assigns.filter { it.value !is NumericLiteral } bbAssigns.size shouldBe 2 bbAssigns[0].target.identifier!!.nameInSource shouldBe listOf("bb") bbAssigns[0].value shouldBe instanceOf() (bbAssigns[0].value as PrefixExpression).operator shouldBe "not" ((bbAssigns[0].value as PrefixExpression).expression as? IdentifierReference)?.nameInSource shouldBe listOf("bb") bbAssigns[0].value.inferType(result.program).getOrElse { fail("dt") } shouldBe DataType.UBYTE bbAssigns[1].target.identifier!!.nameInSource shouldBe listOf("bb") val bbAssigns1expr = bbAssigns[1].value as BinaryExpression bbAssigns1expr.operator shouldBe "or" (bbAssigns1expr.left as? IdentifierReference)?.nameInSource shouldBe listOf("bb") bbAssigns1expr.right shouldBe instanceOf() (bbAssigns1expr.right as PrefixExpression).operator shouldBe "not" ((bbAssigns1expr.right as PrefixExpression).expression as? IdentifierReference)?.nameInSource shouldBe listOf("ww") bbAssigns1expr.inferType(result.program).getOrElse { fail("dt") } shouldBe DataType.UBYTE val asm = generateAssembly(result.program, options) asm shouldNotBe null asm!!.name.shouldNotBeBlank() } test("intermediate assignment steps generated for typecasted expression") { val src = """ main { sub start() { ubyte r ubyte @shared bb = (sgn(r)*2 + 100) as ubyte } } """ val result = compileText(C64Target(), true, src, writeAssembly = true)!! /* turned into: ubyte r r = 0 ubyte bb prog8_lib.retval_interm_b = sgn(r) prog8_lib.retval_interm_b <<= 1 prog8_lib.retval_interm_b += 100 bb = prog8_lib.retval_interm_b return */ val st = result.program.entrypoint.statements st.size shouldBe 8 st.last() shouldBe instanceOf() var assign = st[3] as Assignment assign.target.identifier!!.nameInSource shouldBe listOf("prog8_lib","tempvar_b") assign = st[4] as Assignment assign.target.identifier!!.nameInSource shouldBe listOf("prog8_lib","tempvar_b") assign = st[5] as Assignment assign.target.identifier!!.nameInSource shouldBe listOf("prog8_lib","tempvar_b") assign = st[6] as Assignment assign.target.identifier!!.nameInSource shouldBe listOf("bb") } test("asmgen correctly deals with float typecasting in augmented assignment") { val src=""" %import floats main { sub start() { ubyte ub float ff = 1.0 ff += (ub as float) ; operator doesn't matter } } """ val result = compileText(C64Target(), optimize=false, src, writeAssembly = false)!! val assignFF = result.program.entrypoint.statements.last() as Assignment assignFF.isAugmentable shouldBe true assignFF.target.identifier!!.nameInSource shouldBe listOf("ff") val value = assignFF.value as BinaryExpression value.operator shouldBe "+" (value.left as? IdentifierReference)?.nameInSource shouldBe listOf("ff") value.right shouldBe instanceOf() compileText(C64Target(), optimize=false, src, writeAssembly = true) shouldNotBe null } test("unused variable removal") { val src=""" main { sub start() { ubyte unused ; removed ubyte @shared unused_but_shared ; this one should remain ubyte usedvar_only_written ; not removed because has multiple assignments usedvar_only_written=2 usedvar_only_written++ ubyte usedvar ; and this one remains too usedvar = msb(usedvar) } } """ val result = compileText(C64Target(), optimize=true, src, writeAssembly=false)!! result.program.entrypoint.statements.size shouldBe 7 val alldecls = result.program.entrypoint.allDefinedSymbols.toList() alldecls.map { it.first } shouldBe listOf("unused_but_shared", "usedvar_only_written", "usedvar") } test("unused variable removal from subscope") { val src=""" main { sub start() { if cx16.r0 { uword xx ; to be removed cx16.r0 = 0 } func2() sub func2() { uword yy ; to be removed yy=99 ; to be removed cx16.r0 = 0 } } }""" val result = compileText(C64Target(), optimize=true, src, writeAssembly=false)!! printProgram(result.program) result.program.entrypoint.statements.size shouldBe 3 val ifstmt = result.program.entrypoint.statements[0] as IfElse ifstmt.truepart.statements.size shouldBe 1 (ifstmt.truepart.statements[0] as Assignment).target.identifier!!.nameInSource shouldBe listOf("cx16", "r0") val func2 = result.program.entrypoint.statements[2] as Subroutine func2.statements.size shouldBe 1 (func2.statements[0] as Assignment).target.identifier!!.nameInSource shouldBe listOf("cx16", "r0") } test("test simple augmented assignment optimization correctly initializes all variables") { val src=""" main { sub start() { ubyte @shared z1 z1 = 10 ubyte @shared z2 z2 = ~z2 ubyte @shared z3 z3 = not z3 uword @shared z4 z4 = (z4 as ubyte) ubyte @shared z5 z5 = z1+z5+5 ubyte @shared z6 z6 = z1+z6-5 } }""" val result = compileText(C64Target(), optimize=true, src, writeAssembly=false)!! /* expected: ubyte z1 z1 = 10 ubyte z2 z2 = 255 ubyte z3 z3 = 1 uword z4 z4 = 0 ubyte z5 z5 = z1 z5 += 5 ubyte z6 z6 = z1 z6 -= 5 */ val statements = result.program.entrypoint.statements statements.size shouldBe 14 val z1decl = statements[0] as VarDecl val z1init = statements[1] as Assignment val z2decl = statements[2] as VarDecl val z2init = statements[3] as Assignment val z3decl = statements[4] as VarDecl val z3init = statements[5] as Assignment val z4decl = statements[6] as VarDecl val z4init = statements[7] as Assignment val z5decl = statements[8] as VarDecl val z5init = statements[9] as Assignment val z5plus = statements[10] as Assignment val z6decl = statements[11] as VarDecl val z6init = statements[12] as Assignment val z6plus = statements[13] as Assignment z1decl.name shouldBe "z1" z1init.value shouldBe NumericLiteral(DataType.UBYTE, 10.0, Position.DUMMY) z2decl.name shouldBe "z2" z2init.value shouldBe NumericLiteral(DataType.UBYTE, 255.0, Position.DUMMY) z3decl.name shouldBe "z3" z3init.value shouldBe NumericLiteral(DataType.UBYTE, 1.0, Position.DUMMY) z4decl.name shouldBe "z4" z4init.value shouldBe NumericLiteral(DataType.UBYTE, 0.0, Position.DUMMY) z5decl.name shouldBe "z5" (z5init.value as? IdentifierReference)?.nameInSource shouldBe listOf("z1") z5plus.isAugmentable shouldBe true (z5plus.value as BinaryExpression).operator shouldBe "+" (z5plus.value as BinaryExpression).right shouldBe NumericLiteral(DataType.UBYTE, 5.0, Position.DUMMY) z6decl.name shouldBe "z6" (z6init.value as? IdentifierReference)?.nameInSource shouldBe listOf("z1") z6plus.isAugmentable shouldBe true (z6plus.value as BinaryExpression).operator shouldBe "-" (z6plus.value as BinaryExpression).right shouldBe NumericLiteral(DataType.UBYTE, 5.0, Position.DUMMY) } test("force_output option should work with optimizing memwrite assignment") { val src=""" main { %option force_output sub start() { uword aa ubyte zz @(aa) = zz + 32 } } """ val result = compileText(C64Target(), optimize=true, src, writeAssembly=false)!! val stmts = result.program.entrypoint.statements stmts.size shouldBe 6 val assign=stmts.last() as Assignment (assign.target.memoryAddress?.addressExpression as IdentifierReference).nameInSource shouldBe listOf("aa") } test("don't optimize memory writes away") { val src=""" main { sub start() { uword aa ubyte zz @(aa) = zz + 32 ; do not optimize this away! } } """ val result = compileText(C64Target(), optimize=true, src, writeAssembly=false)!! val stmts = result.program.entrypoint.statements stmts.size shouldBe 6 val assign=stmts.last() as Assignment (assign.target.memoryAddress?.addressExpression as IdentifierReference).nameInSource shouldBe listOf("aa") } test("correctly process constant prefix numbers") { val src=""" main { sub start() { ubyte @shared z1 = 1 ubyte @shared z2 = + 1 ubyte @shared z3 = ~ 1 ubyte @shared z4 = not 1 byte @shared z5 = - 1 } } """ val result = compileText(C64Target(), optimize=true, src, writeAssembly=false)!! val stmts = result.program.entrypoint.statements stmts.size shouldBe 10 stmts.filterIsInstance().size shouldBe 5 stmts.filterIsInstance().size shouldBe 5 } test("correctly process constant prefix numbers with type mismatch and give error") { val src=""" main { sub start() { ubyte @shared z1 = - 1 } } """ val errors = ErrorReporterForTests() compileText(C64Target(), optimize=true, src, writeAssembly=false, errors = errors) shouldBe null errors.errors.size shouldBe 2 errors.errors[0] shouldContain "type of value BYTE doesn't match target UBYTE" errors.errors[1] shouldContain "out of range" } test("test augmented expression asmgen") { val src = """ main { sub start() { ubyte c ubyte r ubyte q r = (q+r)-c q=r r = q+(r-c) q=r } }""" val result = compileText(C64Target(), optimize=false, src, writeAssembly=true)!! result.program.entrypoint.statements.size shouldBe 11 result.program.entrypoint.statements.last() shouldBe instanceOf() } test("keep the value initializer assignment if the next one depends on it") { val src=""" main { sub start() { uword @shared yy yy = 20 ; ok to remove =0 initializer before this uword @shared zz zz += 60 ; NOT ok to remove initializer, should evaluate to 60 ubyte @shared xx xx = 6+lsb(abs(xx)) ; is not an initializer because it references xx } } """ val result = compileText(C64Target(), optimize=true, src, writeAssembly=false)!! printProgram(result.program) /* expected result: uword yy yy = 20 uword zz zz = 60 ubyte xx xx = 0 xx = abs(xx) xx += 6 */ val stmts = result.program.entrypoint.statements stmts.size shouldBe 8 stmts.filterIsInstance().size shouldBe 3 stmts.filterIsInstance().size shouldBe 5 } test("only substitue assignments with 0 after a =0 initializer if it is the same variable") { val src=""" main { sub start() { uword @shared xx xx = xx + 20 ; is same var so can be changed just fine into xx=20 uword @shared yy xx = 20 yy = 0 ; is other var.. xx = xx+10 ; so this should not be changed into xx=10 } }""" val result = compileText(C64Target(), optimize=true, src, writeAssembly=false)!! /* expected result: uword xx xx = 20 uword yy yy = 0 xx = 20 yy = 0 xx += 10 */ printProgram(result.program) val stmts = result.program.entrypoint.statements stmts.size shouldBe 7 stmts.filterIsInstance().size shouldBe 2 stmts.filterIsInstance().size shouldBe 5 val assignXX1 = stmts[1] as Assignment assignXX1.target.identifier!!.nameInSource shouldBe listOf("xx") assignXX1.value shouldBe NumericLiteral(DataType.UBYTE, 20.0, Position.DUMMY) val assignXX2 = stmts.last() as Assignment assignXX2.target.identifier!!.nameInSource shouldBe listOf("xx") val xxValue = assignXX2.value as BinaryExpression xxValue.operator shouldBe "+" (xxValue.left as? IdentifierReference)?.nameInSource shouldBe listOf("xx") xxValue.right shouldBe NumericLiteral(DataType.UBYTE, 10.0, Position.DUMMY) } })