discovered crash related to float typecasting in asm assignment codegen

compiler/src/prog8/compiler/Compiler.kt

@@ -44,6 +44,8 @@ fun compileProgram(filepath: Path,
     lateinit var program: Program
     lateinit var importedFiles: List<Path>
 
+    val optimizeFloatExpr = if(optimize) optimizeFloatExpressions else false
+
     val compTarget =
         when(compilationTarget) {
             C64Target.name -> C64Target
@@ -58,7 +60,7 @@ fun compileProgram(filepath: Path,
             with(compilationOptions) {
                 this.slowCodegenWarnings = slowCodegenWarnings
                 this.optimize = optimize
-                this.optimizeFloatExpressions = optimizeFloatExpressions
+                this.optimizeFloatExpressions = optimizeFloatExpr
             }
             program = programresult
             importedFiles = imported

compiler/test/TestCompilerOnExamples.kt

@@ -23,7 +23,7 @@ private val examplesDir = assumeDirectory(workingDir, "../examples")
 private fun compileTheThing(filepath: Path, optimize: Boolean, target: ICompilationTarget) = compileProgram(
     filepath,
     optimize,
-    optimizeFloatExpressions = false,
+    optimizeFloatExpressions = true,
     writeAssembly = true,
     slowCodegenWarnings = false,
     quietAssembler = true,

compiler/test/TestOptimization.kt

@@ -15,16 +15,14 @@ import prog8.ast.expressions.*
 import prog8.ast.statements.*
 import prog8.compiler.BeforeAsmGenerationAstChanger
 import prog8.compiler.target.C64Target
-import prog8.compiler.target.c64.C64MachineDefinition
-import prog8.compiler.target.cpu6502.codegen.AsmGen
 import prog8.compilerinterface.*
-import prog8tests.ast.helpers.outputDir
 import prog8tests.helpers.DummyFunctions
 import prog8tests.helpers.DummyMemsizer
 import prog8tests.helpers.DummyStringEncoder
 import prog8tests.helpers.ErrorReporterForTests
 import prog8tests.helpers.assertSuccess
 import prog8tests.helpers.compileText
+import prog8tests.helpers.generateAssembly
 
 class TestOptimization: FunSpec({
     test("testRemoveEmptySubroutineExceptStart") {
@@ -188,10 +186,34 @@ class TestOptimization: FunSpec({
         (bbAssigns1expr.right as PrefixExpression).expression shouldBe IdentifierReference(listOf("ww"), Position.DUMMY)
         bbAssigns1expr.inferType(result.program).getOrElse { fail("dt") } shouldBe DataType.UBYTE
 
-        val zp = C64MachineDefinition.C64Zeropage(options)
-        options.compTarget.machine.zeropage=zp
-        val asmgen = AsmGen(result.program, ErrorReporterForTests(), zp, options, C64Target, outputDir)
-        val asm = asmgen.compileToAssembly()
+        val asm = generateAssembly(result.program, options)
+        asm.valid shouldBe true
+    }
+
+    test("asmgen correctly deals with float typecasting in augmented assignment") {
+        val src="""
+            %option enable_floats
+            
+            main {
+                sub start() {
+                    ubyte ub
+                    float ff
+                    ff += (ub as float)         ; operator doesn't matter
+                }
+            }
+        """
+        val result1 = compileText(C64Target, optimize=false, src, writeAssembly = false).assertSuccess()
+
+        // yy = (dy*(pixely as float) )
+        val assignYY = result1.program.entrypoint.statements.last() as Assignment
+        assignYY.isAugmentable shouldBe true
+        assignYY.target.identifier!!.nameInSource shouldBe listOf("ff")
+        val value = assignYY.value as BinaryExpression
+        value.operator shouldBe "+"
+        value.left shouldBe IdentifierReference(listOf("ff"), Position.DUMMY)
+        value.right shouldBe instanceOf<TypecastExpression>()
+
+        val asm = generateAssembly(result1.program)
         asm.valid shouldBe true
     }
 })

compiler/test/helpers/compileXyz.kt

@@ -2,10 +2,13 @@ package prog8tests.helpers
 
 import io.kotest.assertions.withClue
 import io.kotest.matchers.shouldBe
+import prog8.ast.Program
 import prog8.compiler.CompilationResult
 import prog8.compiler.compileProgram
-import prog8.compilerinterface.ICompilationTarget
-import prog8.compilerinterface.IErrorReporter
+import prog8.compiler.target.C64Target
+import prog8.compiler.target.c64.C64MachineDefinition
+import prog8.compiler.target.cpu6502.codegen.AsmGen
+import prog8.compilerinterface.*
 import prog8tests.ast.helpers.assumeReadableFile
 import prog8tests.ast.helpers.outputDir
 import java.nio.file.Path
@@ -37,14 +40,15 @@ internal fun compileFile(
     fileName: String,
     outputDir: Path = prog8tests.ast.helpers.outputDir,
     errors: IErrorReporter? = null,
-    writeAssembly: Boolean = true
+    writeAssembly: Boolean = true,
+    optFloatExpr: Boolean = true
 ) : CompilationResult {
     val filepath = fileDir.resolve(fileName)
     assumeReadableFile(filepath)
     return compileProgram(
         filepath,
         optimize,
-        optimizeFloatExpressions = false,
+        optimizeFloatExpressions = optFloatExpr,
         writeAssembly = writeAssembly,
         slowCodegenWarnings = false,
         quietAssembler = true,
@@ -65,10 +69,23 @@ internal fun compileText(
     optimize: Boolean,
     sourceText: String,
     errors: IErrorReporter? = null,
-    writeAssembly: Boolean = true
+    writeAssembly: Boolean = true,
+    optFloatExpr: Boolean = true
 ) : CompilationResult {
     val filePath = outputDir.resolve("on_the_fly_test_" + sourceText.hashCode().toUInt().toString(16) + ".p8")
     // we don't assumeNotExists(filePath) - should be ok to just overwrite it
     filePath.toFile().writeText(sourceText)
-    return compileFile(platform, optimize, filePath.parent, filePath.name, errors=errors, writeAssembly=writeAssembly)
+    return compileFile(platform, optimize, filePath.parent, filePath.name, errors=errors, writeAssembly=writeAssembly, optFloatExpr = optFloatExpr)
+}
+
+
+internal fun generateAssembly(
+    program: Program,
+    options: CompilationOptions? = null
+): IAssemblyProgram {
+    val coptions = options ?: CompilationOptions(OutputType.RAW, LauncherType.NONE, ZeropageType.DONTUSE, emptyList(), true, true, C64Target)
+    val zp = C64MachineDefinition.C64Zeropage(coptions)
+    coptions.compTarget.machine.zeropage=zp
+    val asmgen = AsmGen(program, ErrorReporterForTests(), zp, coptions, C64Target, outputDir)
+    return asmgen.compileToAssembly()
 }

compilerInterfaces/src/prog8/compilerinterface/CompilationOptions.kt

@@ -18,15 +18,15 @@ enum class ZeropageType {
     DONTUSE
 }
 
-data class CompilationOptions(val output: OutputType,
-                              val launcher: LauncherType,
-                              val zeropage: ZeropageType,
-                              val zpReserved: List<IntRange>,
-                              val floats: Boolean,
-                              val noSysInit: Boolean,
-                              val compTarget: ICompilationTarget
-) {
-    var slowCodegenWarnings = false
-    var optimize = false
-    var optimizeFloatExpressions = false
-}
+class CompilationOptions(val output: OutputType,
+                         val launcher: LauncherType,
+                         val zeropage: ZeropageType,
+                         val zpReserved: List<IntRange>,
+                         val floats: Boolean,
+                         val noSysInit: Boolean,
+                         val compTarget: ICompilationTarget,
+                         // these are set based on command line arguments:
+                         var slowCodegenWarnings: Boolean = false,
+                         var optimize: Boolean = false,
+                         var optimizeFloatExpressions: Boolean = false
+)

docs/source/todo.rst

@@ -3,6 +3,8 @@ TODO
 
 For next compiler release (7.3)
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+- fix float crash in mandelbrot-gfx-colors.p8   (unittest is being written)
+
 - add cosr8, sinr8, cosr16 and sinr16 that take a degree 0..179 (= 0..359 in 2 degree steps)
   to more easily scale halves/quarters etc of a circle than possible with the ones that take 0..255 'degrees'.