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- implicitly clear local dynamic arrays

Browse source 
https://forum.zdoom.org/viewtopic.php?t=62710
This commit is contained in:
alexey.lysiuk 2019-10-20 12:59:20 +03:00 committed by drfrag
parent b52ac9b556
commit 9aff83cfdc
2 changed files with 30 additions and 15 deletions
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38
src/scripting/backend/codegen.cpp
View file

@ -11276,6 +11276,7 @@ FxLocalVariableDeclaration::FxLocalVariableDeclaration(PType *type, FName name,
Name = name;
RegCount = type == TypeVector2 ? 2 : type == TypeVector3 ? 3 : 1;
Init = initval;
clearExpr = nullptr;
}
FxLocalVariableDeclaration::~FxLocalVariableDeclaration()
@ -11286,6 +11287,15 @@ FxLocalVariableDeclaration::~FxLocalVariableDeclaration()
FxExpression *FxLocalVariableDeclaration::Resolve(FCompileContext &ctx)
{
CHECKRESOLVED();
if (IsDynamicArray())
{
auto stackVar = new FxStackVariable(ValueType, StackOffset, ScriptPosition);
FArgumentList argsList;
clearExpr = new FxMemberFunctionCall(stackVar, "Clear", argsList, ScriptPosition);
SAFE_RESOLVE(clearExpr, ctx);
}
if (ctx.Block == nullptr)
{
ScriptPosition.Message(MSG_ERROR, "Variable declaration outside compound statement");
@ -11480,6 +11490,10 @@ ExpEmit FxLocalVariableDeclaration::Emit(VMFunctionBuilder *build)
}
if (pstr->mDestructor != nullptr) build->ConstructedStructs.Push(this);
}
else if (ValueType->isDynArray())
{
ClearDynamicArray(build);
}
}
return ExpEmit();
}
@ -11511,6 +11525,11 @@ void FxLocalVariableDeclaration::Release(VMFunctionBuilder *build)
// For that all local stack variables need to live for the entire execution of a function.
}
void FxLocalVariableDeclaration::ClearDynamicArray(VMFunctionBuilder *build)
{
assert(clearExpr != nullptr);
clearExpr->Emit(build);
}
FxStaticArray::FxStaticArray(PType *type, FName name, FArgumentList &args, const FScriptPosition &pos)
: FxLocalVariableDeclaration(NewArray(type, args.Size()), name, nullptr, VARF_Static|VARF_ReadOnly, pos)
@ -11595,7 +11614,6 @@ FxLocalArrayDeclaration::FxLocalArrayDeclaration(PType *type, FName name, FArgum
{
ExprType = EFX_LocalArrayDeclaration;
values = std::move(args);
clearExpr = nullptr;
}
FxExpression *FxLocalArrayDeclaration::Resolve(FCompileContext &ctx)
@ -11611,16 +11629,6 @@ FxExpression *FxLocalArrayDeclaration::Resolve(FCompileContext &ctx)
auto elementType = (static_cast<PArray *> (ValueType))->ElementType;
auto elementCount = (static_cast<PArray *> (ValueType))->ElementCount;
// We HAVE to clear dynamic arrays before initializing them
if (IsDynamicArray())
{
FArgumentList argsList;
argsList.Clear();
clearExpr = new FxMemberFunctionCall(stackVar, "Clear", argsList, (const FScriptPosition) ScriptPosition);
SAFE_RESOLVE(clearExpr, ctx);
}
if (values.Size() > elementCount)
{
ScriptPosition.Message(MSG_ERROR, "Initializer contains more elements than the array can contain");
@ -11677,9 +11685,11 @@ ExpEmit FxLocalArrayDeclaration::Emit(VMFunctionBuilder *build)
{
assert(!(VarFlags & VARF_Out)); // 'out' variables should never be initialized, they can only exist as function parameters.
if (IsDynamicArray() && clearExpr != nullptr)
const bool isDynamicArray = IsDynamicArray();
if (isDynamicArray)
{
clearExpr->Emit(build);
ClearDynamicArray(build);
}
auto elementSizeConst = build->GetConstantInt(static_cast<PArray *>(ValueType)->ElementSize);
@ -11690,7 +11700,7 @@ ExpEmit FxLocalArrayDeclaration::Emit(VMFunctionBuilder *build)
{
ExpEmit emitval = v->Emit(build);
if (IsDynamicArray())
if (isDynamicArray)
{
continue;
}

7
src/scripting/backend/codegen.h
View file

@ -2131,6 +2131,12 @@ class FxLocalVariableDeclaration : public FxExpression
FxExpression *Init;
int VarFlags;
int RegCount;
protected:
FxExpression *clearExpr;
void ClearDynamicArray(VMFunctionBuilder *build);
public:
int StackOffset = -1;
int RegNum = -1;
@ -2194,7 +2200,6 @@ class FxLocalArrayDeclaration : public FxLocalVariableDeclaration
{
PType *ElementType;
FArgumentList values;
FxExpression *clearExpr;
public: