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Fix name clashes when passing parameters to functions

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This commit is contained in:
Karol Stasiak 2019-05-02 13:24:21 +02:00
parent 1862fed70f
commit 4eba80b735
5 changed files with 16 additions and 8 deletions
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2
CHANGELOG.md
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@ -38,6 +38,8 @@
* Fixed optimizations removing pointless stores to local variables.
* Fixed name clashes when passing parameters to functions.
* Fixed `#use` not accessing all preprocessor parameters.
* Fixed `#pragma` not respecting `#if`.

2
src/main/scala/millfork/compiler/AbstractExpressionCompiler.scala
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@ -29,7 +29,7 @@ class AbstractExpressionCompiler[T <: AbstractCode] {
def callingContext(ctx: CompilationContext, callee: String, v: VariableInMemory): CompilationContext = {
val result = new Environment(Some(ctx.env), "", ctx.options.platform.cpuFamily, ctx.options)
val localName = v.name.stripPrefix(callee + '$')
val localName = v.name + "`aa"
result.addVariable(ctx.options, localName, v, None)
ctx.copy(env = result)
}

2
src/main/scala/millfork/compiler/mos/MosExpressionCompiler.scala
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@ -1404,7 +1404,7 @@ object MosExpressionCompiler extends AbstractExpressionCompiler[AssemblyLine] {
params.zip(paramVars).flatMap {
case (paramExpr, paramVar) =>
val callCtx = callingContext(ctx, function.name, paramVar)
compileAssignment(callCtx, paramExpr, VariableExpression(paramVar.name))
compileAssignment(callCtx, paramExpr, VariableExpression(paramVar.name + "`aa"))
} ++ List(AssemblyLine.absoluteOrLongAbsolute(JSR, function, ctx.options))
}
result

6
src/main/scala/millfork/compiler/z80/Z80ExpressionCompiler.scala
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@ -975,11 +975,11 @@ object Z80ExpressionCompiler extends AbstractExpressionCompiler[ZLine] {
val callCtx = callingContext(ctx, function.name, paramVar)
paramVar.typ.size match {
case 1 =>
compileToA(ctx, paramExpr) ++ storeA(callCtx, VariableExpression(paramVar.name), paramVar.typ.isSigned)
compileToA(ctx, paramExpr) ++ storeA(callCtx, VariableExpression(paramVar.name + "`aa"), paramVar.typ.isSigned)
case 2 =>
compileToHL(ctx, paramExpr) ++ storeHL(callCtx, VariableExpression(paramVar.name), paramVar.typ.isSigned)
compileToHL(ctx, paramExpr) ++ storeHL(callCtx, VariableExpression(paramVar.name + "`aa"), paramVar.typ.isSigned)
case _ =>
storeLarge(callCtx, VariableExpression(paramVar.name), paramExpr)
storeLarge(callCtx, VariableExpression(paramVar.name + "`aa"), paramExpr)
}
} ++ List(ZLine(CALL, NoRegisters, function.toAddress))
}

12
src/main/scala/millfork/env/Environment.scala vendored
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@ -214,6 +214,12 @@ class Environment(val parent: Option[Environment], val prefix: String, val cpuFa
}
}
private def addThing(localName: String, t: Thing, position: Option[Position]): Unit = {
if (assertNotDefined(t.name, position)) {
things(localName) = t
}
}
def getReturnedVariables(statements: Seq[Statement]): Set[String] = {
statements.flatMap {
case ReturnStatement(Some(VariableExpression(v))) => Set(v)
@ -1499,19 +1505,19 @@ class Environment(val parent: Option[Environment], val prefix: String, val cpuFa
def addVariable(options: CompilationOptions, localName: String, variable: Variable, position: Option[Position]): Unit = {
variable match {
case v: StackVariable =>
addThing(v, position)
addThing(localName, v, position)
for ((suffix, offset, t) <- getSubvariables(v.typ)) {
addThing(StackVariable(prefix + localName + suffix, t, baseStackOffset + offset), position)
}
case v: MemoryVariable =>
addThing(v, position)
addThing(localName, v, position)
for ((suffix, offset, t) <- getSubvariables(v.typ)) {
val subv = RelativeVariable(prefix + localName + suffix, v.toAddress + offset, t, zeropage = v.zeropage, declaredBank = v.declaredBank, isVolatile = v.isVolatile)
addThing(subv, position)
registerAddressConstant(subv, position, options, Some(t))
}
case v: VariableInMemory =>
addThing(v, position)
addThing(localName, v, position)
addThing(ConstantThing(v.name + "`", v.toAddress, get[Type]("word")), position)
for ((suffix, offset, t) <- getSubvariables(v.typ)) {
val subv = RelativeVariable(prefix + localName + suffix, v.toAddress + offset, t, zeropage = v.zeropage, declaredBank = v.declaredBank, isVolatile = v.isVolatile)