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- fixed code generation for local dynamic arrays.

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- removed some code repetition by inherit all variable types which reference a PField for a variable offset from a base class so that PField replacements can be done with one set of code.
This commit is contained in:
Christoph Oelckers 2017-02-06 22:57:42 +01:00
parent ca48a687f8
commit 96b2cb0a45
2 changed files with 41 additions and 122 deletions
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130
src/scripting/codegeneration/codegen.cpp
View file

@ -6368,11 +6368,8 @@ ExpEmit FxClassDefaults::Emit(VMFunctionBuilder *build)
//==========================================================================
FxGlobalVariable::FxGlobalVariable(PField* mem, const FScriptPosition &pos)
: FxExpression(EFX_GlobalVariable, pos)
: FxMemberBase(EFX_GlobalVariable, mem, pos)
{
membervar = mem;
AddressRequested = false;
AddressWritable = true; // must be true unless classx tells us otherwise if requested.
}
//==========================================================================
@ -6548,11 +6545,8 @@ ExpEmit FxCVar::Emit(VMFunctionBuilder *build)
//==========================================================================
FxStackVariable::FxStackVariable(PType *type, int offset, const FScriptPosition &pos)
: FxExpression(EFX_StackVariable, pos)
: FxMemberBase(EFX_StackVariable, new PField(NAME_None, type, 0, offset), pos)
{
membervar = new PField(NAME_None, type, 0, offset);
AddressRequested = false;
AddressWritable = true; // must be true unless classx tells us otherwise if requested.
}
//==========================================================================
@ -6651,14 +6645,16 @@ ExpEmit FxStackVariable::Emit(VMFunctionBuilder *build)
//
//
//==========================================================================
FxMemberBase::FxMemberBase(EFxType type, PField *f, const FScriptPosition &p)
:FxExpression(type, p), membervar(f)
{
}
FxStructMember::FxStructMember(FxExpression *x, PField* mem, const FScriptPosition &pos)
: FxExpression(EFX_StructMember, pos)
: FxMemberBase(EFX_StructMember, mem, pos)
{
classx = x;
membervar = mem;
AddressRequested = false;
AddressWritable = true; // must be true unless classx tells us otherwise if requested.
}
//==========================================================================
@ -6730,35 +6726,13 @@ FxExpression *FxStructMember::Resolve(FCompileContext &ctx)
else if (classx->ValueType->IsKindOf(RUNTIME_CLASS(PStruct)))
{
// if this is a struct within a class or another struct we can simplify the expression by creating a new PField with a cumulative offset.
if (classx->ExprType == EFX_ClassMember || classx->ExprType == EFX_StructMember)
if (classx->ExprType == EFX_ClassMember || classx->ExprType == EFX_StructMember || classx->ExprType == EFX_GlobalVariable || classx->ExprType == EFX_StackVariable)
{
auto parentfield = static_cast<FxStructMember *>(classx)->membervar;
auto parentfield = static_cast<FxMemberBase *>(classx)->membervar;
// PFields are garbage collected so this will be automatically taken care of later.
auto newfield = new PField(membervar->SymbolName, membervar->Type, membervar->Flags | parentfield->Flags, membervar->Offset + parentfield->Offset);
newfield->BitValue = membervar->BitValue;
static_cast<FxStructMember *>(classx)->membervar = newfield;
classx->isresolved = false; // re-resolve the parent so it can also check if it can be optimized away.
auto x = classx->Resolve(ctx);
classx = nullptr;
return x;
}
else if (classx->ExprType == EFX_GlobalVariable)
{
auto parentfield = static_cast<FxGlobalVariable *>(classx)->membervar;
auto newfield = new PField(membervar->SymbolName, membervar->Type, membervar->Flags | parentfield->Flags, membervar->Offset + parentfield->Offset);
newfield->BitValue = membervar->BitValue;
static_cast<FxGlobalVariable *>(classx)->membervar = newfield;
classx->isresolved = false; // re-resolve the parent so it can also check if it can be optimized away.
auto x = classx->Resolve(ctx);
classx = nullptr;
return x;
}
else if (classx->ExprType == EFX_StackVariable)
{
auto parentfield = static_cast<FxStackVariable *>(classx)->membervar;
auto newfield = new PField(membervar->SymbolName, membervar->Type, membervar->Flags | parentfield->Flags, membervar->Offset + parentfield->Offset);
newfield->BitValue = membervar->BitValue;
static_cast<FxStackVariable *>(classx)->ReplaceField(newfield);
static_cast<FxMemberBase *>(classx)->membervar = newfield;
classx->isresolved = false; // re-resolve the parent so it can also check if it can be optimized away.
auto x = classx->Resolve(ctx);
classx = nullptr;
@ -6977,19 +6951,9 @@ FxExpression *FxArrayElement::Resolve(FCompileContext &ctx)
if (Array->IsResizableArray())
{
// if this is an array within a class or another struct we can simplify the expression by creating a new PField with a cumulative offset.
if (Array->ExprType == EFX_ClassMember || Array->ExprType == EFX_StructMember)
if (Array->ExprType == EFX_ClassMember || Array->ExprType == EFX_StructMember || Array->ExprType == EFX_GlobalVariable || Array->ExprType == EFX_StackVariable)
{
auto parentfield = static_cast<FxStructMember *>(Array)->membervar;
SizeAddr = parentfield->Offset + sizeof(void*);
}
else if (Array->ExprType == EFX_GlobalVariable)
{
auto parentfield = static_cast<FxGlobalVariable *>(Array)->membervar;
SizeAddr = parentfield->Offset + sizeof(void*);
}
else if (Array->ExprType == EFX_StackVariable)
{
auto parentfield = static_cast<FxStackVariable *>(Array)->membervar;
auto parentfield = static_cast<FxMemberBase *>(Array)->membervar;
SizeAddr = parentfield->Offset + sizeof(void*);
}
else
@ -7011,32 +6975,12 @@ FxExpression *FxArrayElement::Resolve(FCompileContext &ctx)
}
// if this is an array within a class or another struct we can simplify the expression by creating a new PField with a cumulative offset.
if (Array->ExprType == EFX_ClassMember || Array->ExprType == EFX_StructMember)
if (Array->ExprType == EFX_ClassMember || Array->ExprType == EFX_StructMember || Array->ExprType == EFX_GlobalVariable || Array->ExprType == EFX_StackVariable)
{
auto parentfield = static_cast<FxStructMember *>(Array)->membervar;
auto parentfield = static_cast<FxMemberBase *>(Array)->membervar;
// PFields are garbage collected so this will be automatically taken care of later.
auto newfield = new PField(NAME_None, elementtype, parentfield->Flags, indexval * arraytype->ElementSize + parentfield->Offset);
static_cast<FxStructMember *>(Array)->membervar = newfield;
Array->isresolved = false; // re-resolve the parent so it can also check if it can be optimized away.
auto x = Array->Resolve(ctx);
Array = nullptr;
return x;
}
else if (Array->ExprType == EFX_GlobalVariable)
{
auto parentfield = static_cast<FxGlobalVariable *>(Array)->membervar;
auto newfield = new PField(NAME_None, elementtype, parentfield->Flags, indexval * arraytype->ElementSize + parentfield->Offset);
static_cast<FxGlobalVariable *>(Array)->membervar = newfield;
Array->isresolved = false; // re-resolve the parent so it can also check if it can be optimized away.
auto x = Array->Resolve(ctx);
Array = nullptr;
return x;
}
else if (Array->ExprType == EFX_StackVariable)
{
auto parentfield = static_cast<FxStackVariable *>(Array)->membervar;
auto newfield = new PField(NAME_None, elementtype, parentfield->Flags, indexval * arraytype->ElementSize + parentfield->Offset);
static_cast<FxStackVariable *>(Array)->ReplaceField(newfield);
static_cast<FxMemberBase *>(Array)->membervar = newfield;
Array->isresolved = false; // re-resolve the parent so it can also check if it can be optimized away.
auto x = Array->Resolve(ctx);
Array = nullptr;
@ -7083,17 +7027,8 @@ ExpEmit FxArrayElement::Emit(VMFunctionBuilder *build)
build->Emit(OP_LP, start.RegNum, arrayvar.RegNum, build->GetConstantInt(0));
auto f = new PField(NAME_None, TypeUInt32, 0, SizeAddr);
if (Array->ExprType == EFX_ClassMember || Array->ExprType == EFX_StructMember)
{
static_cast<FxStructMember *>(Array)->membervar = f;
static_cast<FxStructMember *>(Array)->AddressRequested = false;
}
else if (Array->ExprType == EFX_GlobalVariable)
{
static_cast<FxGlobalVariable *>(Array)->membervar = f;
static_cast<FxGlobalVariable *>(Array)->AddressRequested = false;
}
static_cast<FxMemberBase *>(Array)->membervar = f;
static_cast<FxMemberBase *>(Array)->AddressRequested = false;
Array->ValueType = TypeUInt32;
bound = Array->Emit(build);
}
@ -7849,9 +7784,9 @@ FxExpression *FxMemberFunctionCall::Resolve(FCompileContext& ctx)
a->ValueType = NewPointer(backingtype);
// Also change the field's type so the code generator can work with this (actually this requires swapping out the entire field.)
if (Self->ExprType == EFX_StructMember || Self->ExprType == EFX_ClassMember)
if (Self->ExprType == EFX_StructMember || Self->ExprType == EFX_ClassMember || Self->ExprType == EFX_StackVariable)
{
auto member = static_cast<FxStructMember*>(a);
auto member = static_cast<FxMemberBase*>(a);
auto newfield = new PField(NAME_None, backingtype, 0, member->membervar->Offset);
member->membervar = newfield;
Self = nullptr;
@ -7859,17 +7794,6 @@ FxExpression *FxMemberFunctionCall::Resolve(FCompileContext& ctx)
member->ValueType = TypeUInt32;
return member;
}
else if (Self->ExprType == EFX_StackVariable)
{
auto member = static_cast<FxStackVariable*>(Self);
auto newfield = new PField(NAME_None, backingtype, 0, member->membervar->Offset);
member->membervar = newfield;
Self = nullptr;
delete this;
member->ValueType = TypeUInt32;
return member;
}
}
else if (a->IsPointer() && Self->ValueType->IsKindOf(RUNTIME_CLASS(PPointer)))
{
@ -7908,19 +7832,9 @@ FxExpression *FxMemberFunctionCall::Resolve(FCompileContext& ctx)
else
{
// Resizable arrays can only be defined in C code and they can only exist in pointer form to reduce their impact on the code generator.
if (Self->ExprType == EFX_StructMember || Self->ExprType == EFX_ClassMember)
if (Self->ExprType == EFX_StructMember || Self->ExprType == EFX_ClassMember || Self->ExprType == EFX_GlobalVariable)
{
auto member = static_cast<FxStructMember*>(Self);
auto newfield = new PField(NAME_None, TypeUInt32, VARF_ReadOnly, member->membervar->Offset + member->membervar->Type->Align); // the size is stored right behind the pointer.
member->membervar = newfield;
Self = nullptr;
delete this;
member->ValueType = TypeUInt32;
return member;
}
else if (Self->ExprType == EFX_GlobalVariable)
{
auto member = static_cast<FxGlobalVariable*>(Self);
auto member = static_cast<FxMemberBase*>(Self);
auto newfield = new PField(NAME_None, TypeUInt32, VARF_ReadOnly, member->membervar->Offset + member->membervar->Type->Align); // the size is stored right behind the pointer.
member->membervar = newfield;
Self = nullptr;

33
src/scripting/codegeneration/codegen.h
View file

@ -1314,19 +1314,30 @@ public:
};
//==========================================================================
//
// FxMemberBase
//
//==========================================================================
class FxMemberBase : public FxExpression
{
public:
PField *membervar;
bool AddressRequested = false;
bool AddressWritable = true;
FxMemberBase(EFxType type, PField *f, const FScriptPosition &p);
};
//==========================================================================
//
// FxGlobalVariaböe
//
//==========================================================================
class FxGlobalVariable : public FxExpression
class FxGlobalVariable : public FxMemberBase
{
public:
PField *membervar;
bool AddressRequested;
bool AddressWritable;
FxGlobalVariable(PField*, const FScriptPosition&);
FxExpression *Resolve(FCompileContext&);
bool RequestAddress(FCompileContext &ctx, bool *writable);
@ -1343,19 +1354,17 @@ public:
ExpEmit Emit(VMFunctionBuilder *build);
};
//==========================================================================
//
// FxClassMember
//
//==========================================================================
class FxStructMember : public FxExpression
class FxStructMember : public FxMemberBase
{
public:
FxExpression *classx;
PField *membervar;
bool AddressRequested;
bool AddressWritable;
FxStructMember(FxExpression*, PField*, const FScriptPosition&);
~FxStructMember();
@ -1403,13 +1412,9 @@ public:
//
//==========================================================================
class FxStackVariable : public FxExpression
class FxStackVariable : public FxMemberBase
{
public:
PField *membervar;
bool AddressRequested;
bool AddressWritable;
FxStackVariable(PType *type, int offset, const FScriptPosition&);
~FxStackVariable();
void ReplaceField(PField *newfield);