MWCC/compiler_and_linker/unsorted/TOC.c

#include "cos.h"
#include "compiler/TOC.h"
#include "compiler/CDecl.h"
#include "compiler/CError.h"
#include "compiler/CExpr.h"
#include "compiler/CInit.h"
#include "compiler/CInt64.h"
#include "compiler/CFunc.h"
#include "compiler/CMachine.h"
#include "compiler/CMangler.h"
#include "compiler/CParser.h"
#include "compiler/CodeGen.h"
#include "compiler/CompilerTools.h"
#include "compiler/Exceptions.h"
#include "compiler/InlineAsm.h"
#include "compiler/InlineAsmPPC.h"
#include "compiler/InstrSelection.h"
#include "compiler/Intrinsics.h"
#include "compiler/ObjGenMachO.h"
#include "compiler/Operands.h"
#include "compiler/PCode.h"
#include "compiler/PCodeInfo.h"
#include "compiler/PPCError.h"
#include "compiler/RegisterInfo.h"
#include "compiler/StackFrame.h"
#include "compiler/enode.h"
#include "compiler/objects.h"
#include "compiler/types.h"

ObjectList *toclist;
ObjectList *exceptionlist;
void *descriptorlist;
PoolEntry *floatconstpool;
PoolEntry *doubleconstpool;
ObjectList *floatconstlist;
PoolEntry *vectorconstpool;
ObjectList *vectorconstlist;
Object toc0;
Boolean no_descriptors;
Object pic_base;
VarInfo pic_base_varinfo;
short pic_base_reg;
CodeLabelList *codelabellist;

UInt8 lvslBytes[16][16] = {
        0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10,
        0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11,
        0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12,
        0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13,
        0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14,
        0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15,
        0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
        0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
        0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
        0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
        0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A,
        0x0C, 0x0D, 0x0E, 0x0F, 0x00, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B,
        0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C,
        0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D,
        0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E
};

UInt8 lvsrBytes[16][16] = {
        0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
        0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E,
        0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D,
        0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C,
        0x0C, 0x0D, 0x0E, 0x0F, 0x00, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B,
        0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A,
        0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
        0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
        0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
        0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
        0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15,
        0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14,
        0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13,
        0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12,
        0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11,
        0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10
};

// forward decls
static void estimate_func_param_size(ENode *node);

static int disables_optimizer(ENode *node) {
    ENode *funcref = node->data.funccall.funcref;
    if (ENODE_IS(funcref, EOBJREF)) {
        if (!strcmp(CMangler_GetLinkName(funcref->data.objref)->name, "___setjmp"))
            return 1;
        if (!strcmp(CMangler_GetLinkName(funcref->data.objref)->name, "___vec_setjmp"))
            return 1;
    }
    return 0;
}

void setupaddressing(void) {
    floatconstlist = NULL;
    descriptorlist = NULL;
    toclist = NULL;
    exceptionlist = NULL;
    vectorconstlist = NULL;
    vectorconstpool = NULL;
    floatconstpool = NULL;
    doubleconstpool = NULL;

    no_descriptors = 1;
    memclrw(&toc0, sizeof(toc0));

    pic_base_reg = 0;
    memclrw(&pic_base, sizeof(pic_base));
    memclrw(&pic_base_varinfo, sizeof(pic_base_varinfo));
    pic_base.otype = OT_OBJECT;
    pic_base.type = (Type *) &void_ptr;
    pic_base.datatype = DNONLAZYPTR;
    pic_base.u.toc.info = &pic_base_varinfo;
}

void createNonLazyPointer(Object *obj) {
    Object *toc;
    ObjectList *list;

    toc = galloc(sizeof(Object));
    obj->toc = toc;
    memclrw(toc, sizeof(Object));

    toc->otype = OT_OBJECT;
    toc->name = CParser_GetUniqueName();
    toc->toc = NULL;
    toc->section = SECT_NONLAZY_PTRS;
    toc->u.toc.info = CodeGen_GetNewVarInfo();
    toc->sclass = TK_STATIC;
    toc->qual = Q_CONST;
    toc->datatype = DNONLAZYPTR;
    toc->flags |= OBJECT_FLAGS_2;
    toc->type = CDecl_NewPointerType(obj->type);
    toc->u.toc.over_load = obj;
    toc->u.toc.linkname = CMangler_GetLinkName(obj);

    list = galloc(sizeof(ObjectList));
    memclrw(list, sizeof(ObjectList));
    list->object = toc;
    list->next = toclist;
    toclist = list;
}

void referenceIndirectPointer(Object *obj) {
    VarInfo *vi = obj->toc->u.toc.info;
    vi->used = 1;
    vi->usage += copts.optimizesize ? 1 : curstmtvalue;
}

Object *createIndirect(Object *obj, Boolean flag1, Boolean flag2) {
    CError_ASSERT(622, !copts.no_common || (obj->section != SECT_COMMON_VARS) || (obj->qual & Q_20000));

    if (CParser_HasInternalLinkage(obj))
        return NULL;
    if (ObjGen_IsExported(obj))
        return NULL;

    if (!copts.no_common && obj->datatype == DDATA && obj->section == SECT_DEFAULT && (obj->qual & Q_1000000))
        obj->section = SECT_COMMON_VARS;

    if (copts.codegen_dynamic && (!copts.no_common || !(obj->qual & Q_1000000))) {
        if (!obj->toc)
            createNonLazyPointer(obj);
        else if (flag1)
            obj->toc->u.toc.info = CodeGen_GetNewVarInfo();

        if (flag2)
            referenceIndirectPointer(obj);

        return obj->toc;
    } else {
        return NULL;
    }
}

Object *createfloatconstant(Type *type, Float *data) {
    ObjectList *list;
    Object *obj;
    UInt32 *check;

    for (list = floatconstlist; list; list = list->next) {
        obj = list->object;
        check = (UInt32 *) obj->u.data.u.floatconst;
        if (obj->type == type && check[0] == ((UInt32 *) data)[0] && check[1] == ((UInt32 *) data)[1])
            return obj;
    }

    obj = galloc(sizeof(Object));
    memclrw(obj, sizeof(Object));
    obj->otype = OT_OBJECT;
    obj->type = type;
    obj->name = CParser_GetUniqueName();
    obj->toc = NULL;
    obj->u.data.info = NULL;
    obj->u.data.linkname = obj->name;
    obj->sclass = TK_STATIC;
    obj->qual = Q_CONST | Q_INLINE_DATA;
    obj->datatype = DDATA;
    if (type->size == 8)
        obj->section = SECT_8BYTE_LITERALS;
    else if (type->size == 4)
        obj->section = SECT_4BYTE_LITERALS;
    else
        CError_FATAL(807);

    obj->flags |= OBJECT_FLAGS_2;

    obj->u.data.u.floatconst = galloc(sizeof(Float));
    *obj->u.data.u.floatconst = *data;

    list = galloc(sizeof(ObjectList));
    memclrw(list, sizeof(ObjectList));
    list->object = obj;
    list->next = floatconstlist;
    floatconstlist = list;

    ObjGen_DeclareFloatConst(obj);
    return obj;
}

Object *createvectorconstant(Type *type, MWVector128 *data) {
    ObjectList *list;
    Object *obj;
    MWVector128 *check;

    for (list = vectorconstlist; list; list = list->next) {
        obj = list->object;
        check = obj->u.data.u.vector128const;
        if (check->ul[0] == data->ul[0] && check->ul[1] == data->ul[1] && check->ul[2] == data->ul[2] && check->ul[3] == data->ul[3])
            return obj;
    }

    obj = galloc(sizeof(Object));
    memclrw(obj, sizeof(Object));
    obj->otype = OT_OBJECT;
    obj->type = type;
    obj->name = CParser_GetUniqueName();
    obj->toc = NULL;
    obj->u.data.info = NULL;
    obj->u.data.linkname = obj->name;
    obj->sclass = TK_STATIC;
    obj->qual = Q_CONST | Q_INLINE_DATA;
    obj->datatype = DDATA;
    if (type->size == 16)
        obj->section = SECT_16BYTE_LITERALS;
    else
        CError_FATAL(900);

    obj->flags |= OBJECT_FLAGS_2;

    obj->u.data.u.vector128const = galloc(sizeof(MWVector128));
    *obj->u.data.u.vector128const = *data;

    list = galloc(sizeof(ObjectList));
    memclrw(list, sizeof(ObjectList));
    list->object = obj;
    list->next = vectorconstlist;
    vectorconstlist = list;

    ObjGen_DeclareVectorConst(obj);
    return obj;
}

void DeclarePooledConstants(void) {
    PoolEntry *entry;
    char *buffer;
    SInt32 fsize;
    SInt32 dsize;
    SInt32 vsize;

    fsize = 0;
    for (entry = floatconstpool; entry; entry = entry->next)
        fsize += 4;

    if (fsize) {
        floatconstpool->object->type = CDecl_NewArrayType(TYPE(&stfloat), fsize);
        buffer = galloc(fsize);
        for (entry = floatconstpool; entry; entry = entry->next)
            memcpy(buffer + entry->offset, entry->buffer, 4);
        CInit_DeclareReadOnlyData(floatconstpool->object, buffer, NULL, fsize);
    }

    dsize = 0;
    for (entry = doubleconstpool; entry; entry = entry->next)
        dsize += 8;

    if (dsize) {
        doubleconstpool->object->type = CDecl_NewArrayType(TYPE(&stdouble), dsize);
        buffer = galloc(dsize);
        for (entry = doubleconstpool; entry; entry = entry->next)
            memcpy(buffer + entry->offset, entry->buffer, 8);
        CInit_DeclareReadOnlyData(doubleconstpool->object, buffer, NULL, dsize);
    }

    vsize = 0;
    for (entry = vectorconstpool; entry; entry = entry->next)
        vsize += 16;

    if (vsize) {
        vectorconstpool->object->type = CDecl_NewArrayType(TYPE(&stvectorsignedlong), vsize);
        buffer = galloc(vsize);
        for (entry = vectorconstpool; entry; entry = entry->next)
            memcpy(buffer + entry->offset, entry->buffer, 16);
        CInit_DeclareReadOnlyData(vectorconstpool->object, buffer, NULL, vsize);
    }
}

static Object *CreatePooledFloatConst(Type *type, Float *data, SInt32 *pOffset) {
    if (type->size == 8u) {
        PoolEntry *entry;
        void *buffer;
        Object *object;
        SInt32 offset;

        buffer = galloc(8u);
        CMach_InitFloatMem(type, *data, buffer);
        if (cparamblkptr->precompile == 1)
            CError_Error(CErrorStr180);

        for (entry = doubleconstpool; entry; entry = entry->next) {
            if (!memcmp(entry->buffer, buffer, 8u))
                break;
        }

        if (!entry) {
            if (doubleconstpool) {
                object = doubleconstpool->object;
                offset = doubleconstpool->offset + 8u;
                doubleconstpool->object->type->size += 8u;
            } else {
                DeclInfo di;
                memclrw(&di, sizeof(di));
                di.thetype = CDecl_NewArrayType(TYPE(&stdouble), 8u);
                di.name = GetHashNameNodeExport("@doubleBase0");
                di.qual = Q_CONST;
                di.storageclass = TK_STATIC;
                di.is_extern_c = 1;
                di.section = SECT_CONST;
                object = CParser_NewGlobalDataObject(&di);
                object->nspace = cscope_root;
                offset = 0;
            }

            entry = galloc(sizeof(PoolEntry));
            entry->next = doubleconstpool;
            doubleconstpool = entry;
            entry->object = object;
            entry->offset = offset;
            entry->buffer = galloc(8u);
            memcpy(entry->buffer, buffer, 8u);
        }

        *pOffset = entry->offset;
        return entry->object;
    }

    if (type->size == 4u) {
        PoolEntry *entry;
        void *buffer;
        Object *object;
        SInt32 offset;

        buffer = galloc(4u);
        CMach_InitFloatMem(type, *data, buffer);
        if (cparamblkptr->precompile == 1)
            CError_Error(CErrorStr180);

        for (entry = floatconstpool; entry; entry = entry->next) {
            if (!memcmp(entry->buffer, buffer, 4u))
                break;
        }

        if (!entry) {
            if (floatconstpool) {
                object = floatconstpool->object;
                offset = floatconstpool->offset + 4u;
                object->type->size += 4u;
            } else {
                DeclInfo di;
                memclrw(&di, sizeof(di));
                di.thetype = CDecl_NewArrayType(TYPE(&stfloat), 4u);
                di.name = GetHashNameNodeExport("@floatBase0");
                di.qual = Q_CONST;
                di.storageclass = TK_STATIC;
                di.is_extern_c = 1;
                di.section = SECT_CONST;
                object = CParser_NewGlobalDataObject(&di);
                object->nspace = cscope_root;
                offset = 0;
            }

            entry = galloc(sizeof(PoolEntry));
            entry->next = floatconstpool;
            floatconstpool = entry;
            entry->object = object;
            entry->offset = offset;
            entry->buffer = galloc(4u);
            memcpy(entry->buffer, buffer, 4u);
        }

        *pOffset = entry->offset;
        return entry->object;
    }

    CError_FATAL(1183);
    return NULL;
}

Object *CreateFloatConst(Type *type, Float *data, SInt32 *pOffset) {
    *pOffset = 0;
    return createfloatconstant(type, data);
}

static void RewriteFloatConst(ENode *expr) {
    Object *obj;
    SInt32 n;
    ENode *subexpr;

    obj = CreateFloatConst(expr->rtype, &expr->data.floatval, &n);
    if (n) {
        subexpr = makediadicnode(create_objectrefnode(obj), intconstnode(TYPE(&stunsignedlong), n), EADD);
    } else {
        subexpr = create_objectrefnode(obj);
    }

    expr->type = EINDIRECT;
    expr->cost = 1;
    expr->flags |= Q_CONST;
    expr->data.monadic = subexpr;
}

static void RewriteVectorConst(ENode *expr) {
    PoolEntry *entry;
    Object *object;
    SInt32 offset;
    ENode *inner;
    UInt8 data[16];

    CMach_InitVectorMem(expr->rtype, expr->data.vector128val, data, 1);

    if (cparamblkptr->precompile == 1)
        CError_Error(CErrorStr180);

    for (entry = vectorconstpool; entry; entry = entry->next) {
        if (!memcmp(entry->buffer, data, 16))
            break;
    }

    if (!entry) {
        if (vectorconstpool) {
            object = vectorconstpool->object;
            offset = vectorconstpool->offset + 16;
            vectorconstpool->object->type->size += 16;
        } else {
            DeclInfo di;
            memclrw(&di, sizeof(di));
            di.thetype = CDecl_NewArrayType(TYPE(&stvectorsignedlong), 16);
            di.name = GetHashNameNodeExport("@vectorBase0");
            di.qual = Q_CONST;
            di.storageclass = TK_STATIC;
            di.is_extern_c = 1;
            di.section = SECT_CONST;
            object = CParser_NewGlobalDataObject(&di);
            object->nspace = cscope_root;
            offset = 0;
        }

        entry = galloc(sizeof(PoolEntry));
        entry->next = vectorconstpool;
        vectorconstpool = entry;
        entry->object = object;
        entry->offset = offset;
        entry->buffer = galloc(16);
        memcpy(entry->buffer, data, 16);
    }

    if (entry->offset) {
        inner = makediadicnode(
            create_objectrefnode(entry->object),
            intconstnode(TYPE(&stunsignedlong), entry->offset),
            EADD);
    } else {
        inner = create_objectrefnode(entry->object);
    }

    expr->type = EINDIRECT;
    expr->cost = 1;
    expr->flags |= ENODE_FLAG_CONST;
    expr->data.monadic = inner;
}

static Object *createcodelabel(CLabel *label) {
    CodeLabelList *list;
    Object *obj;

    for (list = codelabellist; list; list = list->next) {
        if (list->label == label)
            return list->object;
    }

    obj = galloc(sizeof(Object));
    memclrw(obj, sizeof(Object));
    obj->otype = OT_OBJECT;
    obj->type = (Type *) &void_ptr;
    obj->name = label->uniquename;
    obj->toc = NULL;
    obj->u.data.info = NULL; // not sure if this is the right union!
    obj->sclass = TK_STATIC;
    obj->qual = Q_CONST;
    obj->datatype = DDATA;
    obj->flags |= OBJECT_FLAGS_2 | OBJECT_DEFINED;

    list = galloc(sizeof(CodeLabelList));
    memclrw(list, sizeof(CodeLabelList));
    list->object = obj;
    list->label = label;
    list->next = codelabellist;
    codelabellist = list;

    return obj;
}

void dumpcodelabels(Object *func) {
    CodeLabelList *list;

    for (list = codelabellist; list; list = list->next)
        ObjGen_DeclareCodeLabel(list->object, list->label->pclabel->block->codeOffset, func);
}

static void referenceexception(Object *obj) {
    ObjectList *list;

    if (obj && obj->otype == OT_OBJECT && obj->datatype == DLOCAL) {
        for (list = exceptionlist; list; list = list->next) {
            if (list->object == obj)
                return;
        }

        list = lalloc(sizeof(ObjectList));
        memclrw(list, sizeof(ObjectList));
        list->object = obj;
        list->next = exceptionlist;
        exceptionlist = list;
    }
}

static ENodeType invert_relop(ENodeType nodetype) {
    switch (nodetype) {
        case ELESS: return EGREATEREQU;
        case EGREATER: return ELESSEQU;
        case ELESSEQU: return EGREATER;
        case EGREATEREQU: return ELESS;
        case EEQU: return ENOTEQU;
        case ENOTEQU: return EEQU;
        default: return nodetype;
    }
}

static ENode *COND_to_COMPARE(ENode *cond, ENode *expr1, ENode *expr2) {
    SInt32 val1;
    SInt32 val2;
    SInt32 condval;
    ENodeType invop;

    while (expr1->type == ETYPCON && TYPE_FITS_IN_REGISTER(expr1->rtype))
        expr1 = expr1->data.monadic;
    while (expr2->type == ETYPCON && TYPE_FITS_IN_REGISTER(expr2->rtype))
        expr2 = expr2->data.monadic;

    if (expr1->type != EINTCONST || !TYPE_FITS_IN_REGISTER(expr1->rtype) || !CInt64_IsInRange(expr1->data.intval, 4))
        return NULL;
    if (expr2->type != EINTCONST || !TYPE_FITS_IN_REGISTER(expr2->rtype) || !CInt64_IsInRange(expr2->data.intval, 4))
        return NULL;

    val1 = expr1->data.intval.lo;
    val2 = expr2->data.intval.lo;
    condval = 0;
    switch (val1) {
        case 1:
            if (val2 != 0)
                return NULL;
            break;
        case 0:
            condval = 1;
            if (val2 != 1)
                return NULL;
            break;
        default:
            return NULL;
    }

    while (cond->type == ELOGNOT) {
        condval = (condval + 1) & 1;
        cond = cond->data.monadic;
    }

    if (condval) {
        invop = invert_relop(cond->type);
        if (invop == cond->type)
            return NULL;
        cond->type = invop;
    }

    return cond;
}

static ENode *comparewithzero(ENode *expr) {
    ENode *expr1;
    ENode *expr2;
    ENode *tmp;

    expr1 = lalloc(sizeof(ENode));
    memclrw(expr1, sizeof(ENode));
    expr2 = lalloc(sizeof(ENode));
    memclrw(expr2, sizeof(ENode));

    while (expr->type == EFORCELOAD || expr->type == ETYPCON || expr->type == ECOMMA) {
        if (!TYPE_FITS_IN_REGISTER(expr->rtype))
            break;
        if (expr->type == ECOMMA) {
            expr->data.diadic.right = comparewithzero(expr->data.diadic.right);
            return expr;
        }
        expr = expr->data.monadic;
    }

    if (expr->type == ECOND && TYPE_FITS_IN_REGISTER(expr->rtype)) {
        tmp = COND_to_COMPARE(expr->data.cond.cond, expr->data.cond.expr1, expr->data.cond.expr2);
        if (tmp)
            expr = tmp;
    }

    if (expr->type >= ELESS && expr->type <= ENOTEQU)
        return expr;

    if (IS_TYPE_FLOAT(expr->rtype)) {
        static Float float0 = {0.0};

        expr2->type = EFLOATCONST;
        expr2->cost = 0;
        expr2->rtype = (expr->rtype->size == 4) ? (Type *) &stfloat : (Type *) &stdouble;
        expr2->data.floatval = float0;
    } else {
        expr2->type = EINTCONST;
        expr2->cost = 0;
        if (TYPE_IS_8BYTES(expr->rtype))
            expr2->rtype = (Type *) &stsignedlonglong;
        else
            expr2->rtype = (Type *) &stsignedint;
        expr2->data.intval.lo = 0;
        expr2->data.intval.hi = 0;
    }

    expr1->type = ENOTEQU;
    expr1->cost = expr->cost;
    expr1->rtype = (Type *) &stsignedint;
    expr1->data.diadic.left = expr;
    expr1->data.diadic.right = expr2;
    return expr1;
}

static void rewritefunctioncallreturningstruct(ENode *expr) {
    ENode *ret_expr;
    ENode *copy;

    ret_expr = expr->data.funccall.args->node;

    copy = lalloc(sizeof(ENode));
    memclrw(copy, sizeof(ENode));

    *copy = *expr;
    expr->type = ECOMMA;
    expr->data.diadic.left = copy;
    expr->data.diadic.right = ret_expr;
}

static void rewritestrcpy(ENode *expr) {
    ENode *int_expr;
    ENodeList *list;

    int_expr = lalloc(sizeof(ENode));
    memclrw(int_expr, sizeof(ENode));
    int_expr->type = EINTCONST;
    int_expr->cost = 0;
    int_expr->flags = 0;
    int_expr->rtype = (Type *) &stunsignedlong;
    CInt64_SetLong(&int_expr->data.intval, expr->data.funccall.args->next->node->data.string.size);

    list = lalloc(sizeof(ENodeList));
    memclrw(list, sizeof(ENodeList));
    list->next = NULL;
    list->node = int_expr;
    expr->data.funccall.args->next->next = list;
    expr->data.funccall.funcref->data.objref = __memcpy_object;
}

static SInt32 magnitude(Type *type) {
    if (IS_TYPE_FLOAT(type))
        return type->size * 4;
    else if (is_unsigned(type))
        return (type->size * 2) + 1;
    else
        return type->size * 2;
}

static Type *promote_type(Type *type) {
    if (IS_TYPE_ENUM(type))
        type = TYPE_ENUM(type)->enumtype;
    if (TYPE_INTEGRAL(type)->integral > stsignedint.integral)
        return type;
    else
        return (Type *) &stsignedint;
}

static Type *common_type(Type *type1, Type *type2) {
    Type *tmp;

    if (IS_TYPE_FLOAT(type1) || IS_TYPE_FLOAT(type2)) {
        if (TYPE_INTEGRAL(type1)->integral > TYPE_INTEGRAL(type2)->integral)
            return type1;
        else
            return type2;
    }

    type1 = promote_type(type1);
    type2 = promote_type(type2);
    if (type1 != type2) {
        if (TYPE_INTEGRAL(type1)->integral < TYPE_INTEGRAL(type2)->integral) {
            tmp = type1;
            type1 = type2;
            type2 = tmp;
        }

        if (type1->size == type2->size && !is_unsigned(type1) && is_unsigned(type2)) {
            if (type1 == (Type *) &stsignedlong) {
                type1 = (Type *) &stunsignedlong;
            } else {
                CError_ASSERT(1789, type1 == (Type *) &stsignedlonglong);
                type1 = (Type *) &stunsignedlonglong;
            }
        }
    }

    return type1;
}

static void rewrite_opassign(ENode *expr, ENodeType exprtype) {
    ENode *left_sub;
    ENode *right;
    Type *left_type;
    Type *right_type;
    ENode *new_expr;
    ENode *tmp;
    Type *commontype;
    Type *promo_left;
    Type *promo_right;

    left_sub = expr->data.diadic.left->data.monadic;
    right = expr->data.diadic.right;
    left_type = expr->data.diadic.left->rtype;
    right_type = expr->data.diadic.right->rtype;

    new_expr = lalloc(sizeof(ENode));
    memclrw(new_expr, sizeof(ENode));
    new_expr->type = exprtype;
    new_expr->rtype = left_type;
    new_expr->data.diadic.left = expr->data.diadic.left;
    new_expr->data.diadic.right = right;

    expr->type = EASS;
    expr->data.diadic.left = left_sub;
    expr->data.diadic.right = new_expr;

    if (left_sub->type != EOBJREF) {
        ENode *define;
        ENode *reuse;

        define = lalloc(sizeof(ENode));
        memclrw(define, sizeof(ENode));
        define->type = EDEFINE;
        define->rtype = left_type;

        reuse = lalloc(sizeof(ENode));
        memclrw(reuse, sizeof(ENode));
        reuse->type = EREUSE;
        reuse->rtype = left_type;
        reuse->data.monadic = define;

        if (left_sub->type != EBITFIELD) {
            define->data.monadic = expr->data.diadic.left;
            expr->data.diadic.left = define;
            new_expr->data.diadic.left->data.diadic.left = reuse;
        } else {
            ENode *copy;
            define->data.monadic = left_sub->data.diadic.left;
            left_sub->data.diadic.left = define;

            copy = lalloc(sizeof(ENode));
            *copy = *left_sub;
            copy->data.diadic.left = reuse;
            new_expr->data.diadic.left->data.diadic.left = copy;
        }
    }

    switch (exprtype) {
        case EADD:
        case ESUB:
            if (IS_TYPE_POINTER(left_type))
                break;
            if (right->type == EINTCONST && TYPE_FITS_IN_REGISTER(left_type))
                break;
        case EAND:
        case EXOR:
        case EOR:
            if (left_type == right_type)
                break;
        case EMUL:
        case EDIV:
        case EMODULO:
            commontype = common_type(left_type, right_type);
            if (left_type != commontype) {
                tmp = lalloc(sizeof(ENode));
                memclrw(tmp, sizeof(ENode));
                tmp->type = ETYPCON;
                tmp->rtype = left_type;
                tmp->data.monadic = expr->data.diadic.right;
                expr->data.diadic.right = tmp;

                tmp = lalloc(sizeof(ENode));
                memclrw(tmp, sizeof(ENode));
                tmp->type = ETYPCON;
                tmp->rtype = commontype;
                tmp->data.monadic = new_expr->data.diadic.left;
                new_expr->data.diadic.left = tmp;
            }
            if (right_type != commontype) {
                tmp = lalloc(sizeof(ENode));
                memclrw(tmp, sizeof(ENode));
                tmp->type = ETYPCON;
                tmp->rtype = commontype;
                tmp->data.monadic = new_expr->data.diadic.right;
                new_expr->data.diadic.right = tmp;
            }
            new_expr->rtype = commontype;
            break;

        case ESHL:
        case ESHR:
            promo_left = promote_type(left_type);
            promo_right = promote_type(right_type);
            if (left_type != promo_left) {
                tmp = lalloc(sizeof(ENode));
                memclrw(tmp, sizeof(ENode));
                tmp->type = ETYPCON;
                tmp->rtype = left_type;
                tmp->data.monadic = expr->data.diadic.right;
                expr->data.diadic.right = tmp;

                tmp = lalloc(sizeof(ENode));
                memclrw(tmp, sizeof(ENode));
                tmp->type = ETYPCON;
                tmp->rtype = promo_left;
                tmp->data.monadic = new_expr->data.diadic.left;
                new_expr->data.diadic.left = tmp;
            }
            if (right_type != promo_right) {
                if (new_expr->data.diadic.right->type == EINTCONST && promo_right == (Type *) &stsignedint) {
                    new_expr->data.diadic.right->rtype = (Type *) &stsignedint;
                } else {
                    tmp = lalloc(sizeof(ENode));
                    memclrw(tmp, sizeof(ENode));
                    tmp->type = ETYPCON;
                    tmp->rtype = promo_right;
                    tmp->data.monadic = new_expr->data.diadic.right;
                    new_expr->data.diadic.right = tmp;
                }
            }
            new_expr->rtype = promo_left;
            break;
    }
}

static void rewrite_preincdec(ENode *expr) {
    ENode *subexpr; // r31
    Type *type; // r28
    ENode *new_expr; // r29

    subexpr = expr->data.monadic;
    type = expr->rtype;

    new_expr = lalloc(sizeof(ENode));
    memclrw(new_expr, sizeof(ENode));

    if (IS_TYPE_FLOAT(type)) {
        new_expr->type = EFLOATCONST;
        new_expr->cost = 0;
        new_expr->rtype = type;
        new_expr->data.floatval = one_point_zero;
    } else if (IS_TYPE_POINTER(type)) {
        new_expr->type = EINTCONST;
        new_expr->cost = 0;
        new_expr->rtype = (Type *) &stunsignedlong;
        new_expr->data.intval.hi = 0;
        new_expr->data.intval.lo = TYPE_POINTER(type)->target->size;
    } else {
        new_expr->type = EINTCONST;
        new_expr->cost = 0;
        new_expr->rtype = type;
        new_expr->data.intval.hi = 0;
        new_expr->data.intval.lo = 1;
    }

    expr->type = (expr->type == EPREDEC) ? ESUBASS : EADDASS;
    expr->data.diadic.left = subexpr;
    expr->data.diadic.right = new_expr;
}

// Don't know what this would be called in the original, but weh
typedef union signed_vec {
    SInt8 sc[16];
    SInt16 ss[8];
    SInt32 sl[4];
} signed_vec;

Boolean canoptimizevectorconst(MWVector128 *vecp, Type *type, COVCResult *result) {
    // this function is very broken
    signed_vec vec;
    union { SInt32 lg; SInt8 ch[4]; } conv32;
    union { SInt16 sh; SInt8 ch[2]; } conv16;
    char flag;
    SInt8 first8;
    SInt16 first16;
    SInt32 first32;
    int i;
    char ci;
    UInt32 l0, l1, l2, l3;

    if (IS_TYPE_VECTOR(type)) {
        vec = *((signed_vec *) vecp);

        first8 = vec.sc[0];
        flag = 1;
        i = 1;
        while (flag && i < 16)
            flag = first8 == vec.sc[i++];
        /*flag = 1;
        for (i = 1; flag && i < 16; i++) {
            flag = first8 == vec.sc[i];
        }*/

        if (flag && first8 < 16 && first8 > -17) {
            if (result) {
                result->op1 = PC_VSPLTISB;
                result->op2 = -1;
                result->arg = first8;
            }
            return 1;
        }

        first16 = vec.ss[0];
        flag = 1;
        for (i = 1; flag && i < 8; i++) {
            flag = vec.ss[i] == first16;
        }

        conv16.sh = first16;
        if (flag && conv16.ch[0] == 0 && conv16.ch[1] < 16 && conv16.ch[1] >= 0) {
            if (result) {
                result->op1 = PC_VSPLTISH;
                result->op2 = -1;
                result->arg = conv16.ch[1];
            }
            return 1;
        }

        if (flag && conv16.ch[0] == -1 && (conv16.ch[1] & 0xF0) == 0xF0) {
            if (result) {
                result->op1 = PC_VSPLTISH;
                result->op2 = -1;
                result->arg = conv16.ch[1];
            }
            return 1;
        }

        first32 = vec.sl[0];
        flag = 1;
        for (i = 1; flag && i < 4; i++) {
            flag = vec.sl[i] == first32;
        }

        conv32.lg = first32;
        if (flag && conv32.ch[0] == 0 && conv32.ch[1] == 0 && conv32.ch[2] == 0 && conv32.ch[3] < 16 && conv32.ch[3] >= 0) {
            if (result) {
                result->op1 = PC_VSPLTISW;
                result->op2 = -1;
                result->arg = conv32.ch[3];
            }
            return 1;
        }

        if (flag && conv32.ch[0] == -1 && conv32.ch[1] == -1 && conv32.ch[2] == -1 && (conv32.ch[3] & 0xF0) == 0xF0) {
            if (result) {
                result->op1 = PC_VSPLTISW;
                result->op2 = -1;
                result->arg = conv32.ch[3];
            }
            return 1;
        }

        l0 = vec.sl[0];
        l1 = vec.sl[1];
        l2 = vec.sl[2];
        l3 = vec.sl[3];
        for (ci = 0; ci < 16; ci++) {
            UInt32 *l;
            UInt32 *r;

            l = (UInt32 *) lvslBytes[(char) ci];
            r = (UInt32 *) lvsrBytes[(char) ci];
            if (l0 == l[0] && l1 == l[1] && l2 == l[2] && l3 == l[3]) {
                if (result) {
                    result->op1 = -1;
                    result->op2 = PC_LVSL;
                    result->arg = ci;
                }
                return 1;
            }
            if (l0 == r[0] && l1 == r[1] && l2 == r[2] && l3 == r[3]) {
                if (result) {
                    result->op1 = -1;
                    result->op2 = PC_LVSR;
                    result->arg = ci;
                }
                return 1;
            }
        }
    }

    return 0;
}

static SInt32 countindirects(ENode *expr) {
    SInt32 tmp1;
    SInt32 tmp2;

    switch (expr->type) {
        case EINTCONST:
        case EFLOATCONST:
        case ESTRINGCONST:
        case EOBJREF:
        case EVECTOR128CONST:
            return 0;
        case ECOND:
            if (expr->data.cond.cond->hascall || expr->data.cond.expr1->hascall || expr->data.cond.expr2->hascall)
                return 2;

            if ((tmp1 = countindirects(expr->data.cond.cond)) >= 2)
                return 2;
            if ((tmp2 = countindirects(expr->data.cond.expr1)) >= 2)
                return 2;
            if (tmp2 > tmp1)
                tmp1 = tmp2;
            if ((tmp2 = countindirects(expr->data.cond.expr2)) >= 2)
                return 2;
            if (tmp2 > tmp1)
                tmp1 = tmp2;
            return tmp1;
        case EFUNCCALL:
        case EFUNCCALLP:
            return 2;
        case EMUL:
        case EMULV:
        case EDIV:
        case EMODULO:
        case EADDV:
        case ESUBV:
        case EADD:
        case ESUB:
        case ESHL:
        case ESHR:
        case ELESS:
        case EGREATER:
        case ELESSEQU:
        case EGREATEREQU:
        case EEQU:
        case ENOTEQU:
        case EAND:
        case EXOR:
        case EOR:
        case ELAND:
        case ELOR:
        case EASS:
        case EMULASS:
        case EDIVASS:
        case EMODASS:
        case EADDASS:
        case ESUBASS:
        case ESHLASS:
        case ESHRASS:
        case EANDASS:
        case EXORASS:
        case EORASS:
        case ECOMMA:
        case EPMODULO:
        case EROTL:
        case EROTR:
        case EBCLR:
        case EBTST:
        case EBSET:
            if ((tmp1 = countindirects(expr->data.diadic.left)) >= 2)
                return 2;
            if ((tmp2 = countindirects(expr->data.diadic.right)) >= 2)
                return 2;
            if (tmp2 > tmp1)
                tmp1 = tmp2;
            return tmp1;
        case EPOSTINC:
        case EPOSTDEC:
        case EPREINC:
        case EPREDEC:
        case EINDIRECT:
        case EMONMIN:
        case EBINNOT:
        case ELOGNOT:
        case EFORCELOAD:
        case ETYPCON:
        case EBITFIELD:
            if (expr->type == EINDIRECT)
                return countindirects(expr->data.monadic) + 1;
            else
                return countindirects(expr->data.monadic);
        default:
            return 2;
    }
}

static Boolean DetectCondSideAffect(ENode *expr) {
    switch (expr->type) {
        case EMUL:
        case EMULV:
        case EDIV:
        case EMODULO:
        case EADDV:
        case ESUBV:
        case EADD:
        case ESUB:
        case ESHL:
        case ESHR:
        case EAND:
        case EXOR:
        case EOR:
        case ECOMMA:
        case EPMODULO:
        case EROTL:
        case EROTR:
        case EBCLR:
        case EBTST:
        case EBSET:
            if (DetectCondSideAffect(expr->data.diadic.left))
                return 1;
            return DetectCondSideAffect(expr->data.diadic.right);
        case EINDIRECT:
            if (expr->data.monadic->type == EINDIRECT)
                return 1;
            if (expr->data.monadic->type == EOBJREF) {
                if (expr->data.monadic->data.objref->datatype != DLOCAL && expr->data.monadic->data.objref->datatype != DDATA)
                    return 1;
                if (IS_TYPE_POINTER(expr->data.monadic->data.objref->type))
                    return 1;
                return Registers_GetVarInfo(expr->data.monadic->data.objref)->noregister != 0;
            }
            return 1;
        case EMONMIN:
        case EBINNOT:
        case ELOGNOT:
        case EFORCELOAD:
        case ETYPCON:
        case EBITFIELD:
            return DetectCondSideAffect(expr->data.monadic);
        case EINTCONST:
        case EFLOATCONST:
        case ESTRINGCONST:
        case EOBJREF:
        case EVECTOR128CONST:
            return 0;
        case EPOSTINC:
        case EPOSTDEC:
        case EPREINC:
        case EPREDEC:
        case ELESS:
        case EGREATER:
        case ELESSEQU:
        case EGREATEREQU:
        case EEQU:
        case ENOTEQU:
        case ELAND:
        case ELOR:
        case EASS:
        case EMULASS:
        case EDIVASS:
        case EMODASS:
        case EADDASS:
        case ESUBASS:
        case ESHLASS:
        case ESHRASS:
        case EANDASS:
        case EXORASS:
        case EORASS:
        case ECOND:
        case EFUNCCALL:
        case EFUNCCALLP:
        case EMFPOINTER:
        case ENULLCHECK:
        case EPRECOMP:
        case EDEFINE:
        case EREUSE:
        case EASSBLK:
        case ECONDASS:
            return 1;
        default:
            CError_FATAL(2523);
            return 1;
    }
}

static UInt8 WeightandSumOps(ENode *expr) {
    UInt32 score;

    switch (expr->type) {
        case ECOND:
        case ECONDASS:
            score = WeightandSumOps(expr->data.cond.cond);
            score += WeightandSumOps(expr->data.cond.expr1);
            score += WeightandSumOps(expr->data.cond.expr2);
            break;
        case EMUL:
        case EMULV:
        case EMULASS:
            score = WeightandSumOps(expr->data.diadic.left) + 10;
            score += WeightandSumOps(expr->data.diadic.right);
            break;
        case EDIV:
        case EMODULO:
        case EDIVASS:
        case EMODASS:
            score = WeightandSumOps(expr->data.diadic.left) + 20;
            score += WeightandSumOps(expr->data.diadic.right);
            break;
        case EADDV:
        case ESUBV:
        case EADD:
        case ESUB:
        case ESHL:
        case ESHR:
        case ELESS:
        case EGREATER:
        case ELESSEQU:
        case EGREATEREQU:
        case EEQU:
        case ENOTEQU:
        case EAND:
        case EXOR:
        case EOR:
        case ELAND:
        case ELOR:
        case EASS:
        case EADDASS:
        case ESUBASS:
        case ESHLASS:
        case ESHRASS:
        case EANDASS:
        case EXORASS:
        case EORASS:
        case ECOMMA:
        case EPMODULO:
        case EROTL:
        case EROTR:
        case EBCLR:
        case EBTST:
        case EBSET:
            score = WeightandSumOps(expr->data.diadic.left) + 1;
            score += WeightandSumOps(expr->data.diadic.right);
            break;
        case EPOSTINC:
        case EPOSTDEC:
        case EPREINC:
        case EPREDEC:
        case EMONMIN:
        case EBINNOT:
        case ELOGNOT:
            score = WeightandSumOps(expr->data.monadic) + 1;
            break;
        case EINDIRECT:
            if (expr->data.monadic->type == EOBJREF && expr->data.monadic->data.objref->datatype == DLOCAL)
                if (!Registers_GetVarInfo(expr->data.monadic->data.objref)->noregister)
                    return 0;
        case EFORCELOAD:
        case ETYPCON:
        case EBITFIELD:
            score = WeightandSumOps(expr->data.monadic);
            break;
        case EOBJREF:
            score = 0;
            break;
        case EINTCONST:
        case EFLOATCONST:
        case ESTRINGCONST:
        case EVECTOR128CONST:
            score = 0;
            break;
        case EFUNCCALL:
        case EFUNCCALLP:
            score = 5;
            break;
        default:
            score = 255;
    }

    if (score >= 255)
        score = 255;
    return (UInt8) score;
}

Boolean TOC_use_fsel(ENode *expr) {
    ENode *left;
    ENode *right;
    Type *rtype;
    int score1;
    int score2;

    left = expr->data.cond.expr1;
    right = expr->data.cond.expr2;
    rtype = expr->rtype;

    if (!copts.peephole) return 0;
    if (!copts.gen_fsel) return 0;
    if (left->hascall) return 0;
    if (right->hascall) return 0;
    if (!IS_TYPE_FLOAT(rtype)) return 0;
    if (!IS_TYPE_FLOAT(left->rtype)) return 0;
    if (!IS_TYPE_FLOAT(right->rtype)) return 0;

    if (expr->data.cond.cond->type < ELESS || expr->data.cond.cond->type > ENOTEQU)
        return 0;
    if (!IS_TYPE_FLOAT(expr->data.cond.cond->data.diadic.right->rtype))
        return 0;
    if (expr->data.cond.cond->type == ELOGNOT || expr->data.cond.cond->type == ELAND || expr->data.cond.cond->type == ELOR)
        return 0;

    if (expr->type == ECONDASS) {
        if (left->type != EINDIRECT)
            return 0;
        if (left->data.monadic->type != EOBJREF)
            return 0;
    }

    if (DetectCondSideAffect(left))
        return 0;
    if (DetectCondSideAffect(right))
        return 0;

    if (expr->type == ECONDASS)
        score1 = 1;
    else
        score1 = WeightandSumOps(left);
    score2 = WeightandSumOps(right);

    if (score1 > copts.gen_fsel)
        return 0;
    else if (score2 > copts.gen_fsel)
        return 0;
    else
        return 1;
}

Boolean TOC_use_isel(ENode *expr, Boolean flag) {
    int opt;
    ENode *left;
    ENode *right;
    Type *rtype;
    Object *obj;
    int score1;
    int score2;

    left = expr->data.cond.expr1;
    right = expr->data.cond.expr2;
    rtype = expr->rtype;
    if (flag)
        opt = 10;
    else
        opt = copts.gen_isel;

    if (!opt) return 0;
    if (!copts.peephole) return 0;
    if (left->hascall) return 0;
    if (right->hascall) return 0;
    if (!TYPE_FITS_IN_REGISTER(rtype)) return 0;
    if (!TYPE_FITS_IN_REGISTER(left->rtype)) return 0;
    if (!TYPE_FITS_IN_REGISTER(right->rtype)) return 0;

    if (expr->data.cond.cond->type < ELESS || expr->data.cond.cond->type > ENOTEQU)
        return 0;
    if (TYPE_IS_8BYTES(rtype))
        return 0;

    if (flag) {
        if (!TYPE_FITS_IN_REGISTER(expr->data.cond.cond->data.diadic.right->rtype))
            return 0;
        if (TYPE_IS_8BYTES(expr->data.cond.cond->data.diadic.right->rtype))
            return 0;
    }

    if (expr->type == ECONDASS) {
        if (left->type != EINDIRECT)
            return 0;
        if (left->data.monadic->type != EOBJREF)
            return 0;
        if (flag) {
            obj = left->data.monadic->data.objref;
            if (obj->datatype != DLOCAL)
                return 0;
            if ((Registers_GetVarInfo(obj) ? Registers_GetVarInfo(obj)->reg : 0) == 0)
                return 0;
            if (obj->u.var.info->rclass != RegClass_GPR)
                return 0;
        }
    }

    if (DetectCondSideAffect(left))
        return 0;
    if (DetectCondSideAffect(right))
        return 0;

    if (expr->type == ECONDASS)
        score1 = 1;
    else
        score1 = WeightandSumOps(left);
    score2 = WeightandSumOps(right);

    if (score1 > opt)
        return 0;
    else if (score2 > opt)
        return 0;
    else
        return 1;
}

SInt32 GetSizeSkip(ENode *expr) {
    if (expr->type == EASS)
        expr = expr->data.diadic.right;
    if (expr->type == ETYPCON && expr->data.monadic->rtype->size < expr->rtype->size)
        return expr->data.monadic->rtype->size;
    else
        return expr->rtype->size;
}

void Optimize64bitMath(ENode *expr) {
    ENode *left; // r23
    ENode *right; // r28
    SInt32 leftsize; // r24
    SInt32 rightsize; // r25
    SInt32 totalsize; // r22
    int unsignedflag; // r4

    CError_ASSERT(2886, TYPE_IS_8BYTES(expr->rtype));

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    leftsize = GetSizeSkip(left);
    totalsize = (leftsize + (rightsize = GetSizeSkip(right)));
    unsignedflag = is_unsigned(expr->rtype) != 0;

    switch (totalsize) {
        case 2:
        case 3:
        case 4:
            if (unsignedflag) {
                left->rtype = (Type *) &stunsignedint;
                right->rtype = (Type *) &stunsignedint;
            } else {
                left->rtype = (Type *) &stsignedint;
                right->rtype = (Type *) &stsignedint;
            }
            break;
        case 5:
        case 6:
        case 8:
        case 9:
        case 10:
        case 12:
            if (expr->type != ESUB || leftsize >= rightsize) {
                if (leftsize < 4) {
                    if (unsignedflag)
                        left->rtype = (Type *) &stunsignedint;
                    else
                        left->rtype = (Type *) &stsignedint;
                } else {
                    if (left->type == ETYPCON && left->data.monadic->rtype != (Type *) &stfloat)
                        expr->data.diadic.left = left->data.monadic;
                }
                if (rightsize < 4) {
                    if (unsignedflag)
                        right->rtype = (Type *) &stunsignedint;
                    else
                        right->rtype = (Type *) &stsignedint;
                } else {
                    if (right->type == ETYPCON && right->data.monadic->rtype != (Type *) &stfloat)
                        expr->data.diadic.right = right->data.monadic;
                }
            }
            break;
        case 16:
            break;
        default:
            CError_FATAL(2975);
    }
}

static Boolean OptimizeNestedAssginments(ENode **pexpr, Object *check) {
    ENode *expr;
    Boolean success1;
    Boolean success2;

    expr = *pexpr;
    switch (expr->type) {
        case EOBJREF:
            return check != expr->data.objref;
        case EMUL:
        case EMULV:
        case EDIV:
        case EMODULO:
        case EADDV:
        case ESUBV:
        case EADD:
        case ESUB:
        case ESHL:
        case ESHR:
        case ELESS:
        case EGREATER:
        case ELESSEQU:
        case EGREATEREQU:
        case EEQU:
        case ENOTEQU:
        case EAND:
        case EXOR:
        case EOR:
        case ELAND:
        case ELOR:
        case EASS:
        case EMULASS:
        case EDIVASS:
        case EMODASS:
        case EADDASS:
        case ESUBASS:
        case ESHLASS:
        case ESHRASS:
        case EANDASS:
        case EXORASS:
        case EORASS:
        case ECOMMA:
        case EPMODULO:
        case EROTL:
        case EROTR:
        case EBCLR:
        case EBTST:
        case EBSET:
            switch (expr->type) {
                case EASS:
                    if (ENODE_IS(expr->data.diadic.left, EOBJREF) && expr->data.diadic.left->data.objref == check) {
                        *pexpr = expr->data.diadic.right;
                        return OptimizeNestedAssginments(pexpr, check);
                    }
                    break;
                case EMULASS:
                case EDIVASS:
                case EMODASS:
                case EADDASS:
                case ESUBASS:
                case ESHLASS:
                case ESHRASS:
                case EANDASS:
                case EXORASS:
                case EORASS:
                    CError_FATAL(3033);
                    return 0;
            }
            if (OptimizeNestedAssginments(&expr->data.diadic.right, check))
                return OptimizeNestedAssginments(&expr->data.diadic.left, check);
            else
                return 0;
            break;
        case EPOSTINC:
        case EPOSTDEC:
        case EPREINC:
        case EPREDEC:
        case EINDIRECT:
        case EMONMIN:
        case EBINNOT:
        case ELOGNOT:
        case EFORCELOAD:
        case ETYPCON:
        case EBITFIELD:
            return OptimizeNestedAssginments(&expr->data.monadic, check);
        case EINTCONST:
        case EFLOATCONST:
        case ESTRINGCONST:
        case EVECTOR128CONST:
            return 1;
        case ECOND:
            success2 = OptimizeNestedAssginments(&expr->data.cond.expr2, check);
            success1 = OptimizeNestedAssginments(&expr->data.cond.expr1, check);
            if (!success2 || !success1)
                return 0;
            return OptimizeNestedAssginments(&expr->data.cond.cond, check) == 0;
        case ECONDASS:
            if (!OptimizeNestedAssginments(&expr->data.cond.expr2, check))
                return 0;
            if (OptimizeNestedAssginments(&expr->data.cond.cond, check))
                return OptimizeNestedAssginments(&expr->data.cond.expr1, check) == 0;
            else
                return 0;
        case EFUNCCALL:
        case EFUNCCALLP:
        case EMFPOINTER:
        case ENULLCHECK:
        case EPRECOMP:
        case EDEFINE:
        case EREUSE:
        case EASSBLK:
            return 0;
        default:
            CError_FATAL(3083);
            return 0;
    }
}

static void expandTOCexpression(ENode *expr, Type *type, int ignored) {
    Object *obj;
    Object *tmpobj;
    ENode *cond;
    ENode *tmpexpr;
    ENode *newexpr;
    ENodeList *list;

    expr->ignored = ignored;
    switch (expr->type) {
        case EINTCONST:
            expr->hascall = 0;
            break;
        case EFLOATCONST:
            uses_globals = 1;
            RewriteFloatConst(expr);
            expandTOCexpression(expr, NULL, 0);
            break;
        case EVECTOR128CONST:
            if (!canoptimizevectorconst(&expr->data.vector128val, expr->rtype, NULL)) {
                uses_globals = 1;
                RewriteVectorConst(expr);
                expandTOCexpression(expr, NULL, 0);
            }
            break;
        case ESTRINGCONST:
            uses_globals = 1;
            CInit_RewriteString(expr, 1);
            expandTOCexpression(expr, NULL, 0);
            break;
        case EOBJREF:
            obj = expr->data.objref;
            CError_ASSERT(3203, obj->datatype != DALIAS);
            if (obj->datatype == DFUNC || obj->datatype == DVFUNC)
                uses_globals = 1;
            if (obj->datatype == DDATA) {
                uses_globals = 1;
                if (createIndirect(obj, 0, 1)) {
                    tmpexpr = lalloc(sizeof(ENode));
                    memclrw(tmpexpr, sizeof(ENode));
                    tmpexpr->type = EOBJREF;
                    tmpexpr->cost = 0;
                    tmpexpr->data.objref = obj->toc;
                    tmpexpr->rtype = CDecl_NewPointerType(expr->rtype);

                    expr->type = EINDIRECT;
                    expr->cost = 1;
                    expr->data.monadic = tmpexpr;
                }
            }
            expr->hascall = 0;
            break;
        case ECONDASS:
            expr->ignored = 0;
        case ECOND:
            if (!ENODE_IS_RANGE(expr->data.cond.cond, ELESS, ENOTEQU))
                expr->data.cond.cond = comparewithzero(expr->data.cond.cond);
            expandTOCexpression(expr->data.cond.expr1, NULL, ignored);
            expandTOCexpression(expr->data.cond.expr2, NULL, ignored);
            if (TOC_use_fsel(expr)) {
                cond = expr->data.cond.cond;
                if (ENODE_IS(cond->data.diadic.right, EFLOATCONST) && CMach_FloatIsZero(cond->data.diadic.right->data.floatval)) {
                    expandTOCexpression(cond->data.diadic.left, NULL, 0);
                } else if (ENODE_IS(cond->data.diadic.left, EFLOATCONST) && CMach_FloatIsZero(cond->data.diadic.left->data.floatval)) {
                    expandTOCexpression(cond->data.diadic.right, NULL, 0);
                } else {
                    expandTOCexpression(expr->data.cond.cond, NULL, 0);
                }
            } else {
                expandTOCexpression(expr->data.cond.cond, NULL, 0);
            }
            expr->hascall = expr->data.cond.cond->hascall | expr->data.cond.expr1->hascall | expr->data.cond.expr2->hascall;
            break;
        case EFUNCCALL:
        case EFUNCCALLP:
            if (is_intrinsic_function_call(expr)) {
                expr->hascall = 0;
                if ((expr->data.funccall.funcref->data.objref->u.func.u.intrinsicid & 0xFFFFu) == Intrinsic_008) {
                    if (copts.altivec_model)
                        update_frame_align(16);
                    dynamic_stack = 1;
                    requires_frame = 1;
                } else if ((expr->data.funccall.funcref->data.objref->u.func.u.intrinsicid & 0xFFFFu) == Intrinsic_035) {
                    if (expr->data.funccall.args->next->node->type == ESTRINGCONST) {
                        rewritestrcpy(expr);
                    } else {
                        requires_frame = 1;
                        makes_call = 1;
                        expr->hascall = 1;
                    }
                } else if ((expr->data.funccall.funcref->data.objref->u.func.u.intrinsicid & 0xFFFFu) == Intrinsic_036) {
                    if (expr->data.funccall.args->next->next->node->type != EINTCONST) {
                        requires_frame = 1;
                        makes_call = 1;
                        expr->hascall = 1;
                    }
                }
            } else {
                requires_frame = 1;
                makes_call = 1;
                expr->hascall = 1;
            }

            if (disables_optimizer(expr)) {
                disable_optimizer |= 1;
                if (copts.disable_registers)
                    disable_optimizer |= 2;
            }

            if (ENODE_IS(expr->data.funccall.funcref, EINDIRECT) && IS_TYPE_FUNC(expr->data.funccall.funcref->rtype))
                *expr->data.funccall.funcref = *expr->data.funccall.funcref->data.monadic;

            if (ENODE_IS(expr->data.funccall.funcref, EOBJREF)) {
                expr->data.funccall.funcref->hascall = 0;
                if (expr->data.funccall.funcref->data.objref->datatype == DVFUNC && (expr->data.funccall.funcref->flags & ENODE_FLAG_80)) {
                    tmpobj = galloc(sizeof(Object));
                    *tmpobj = *expr->data.funccall.funcref->data.objref;
                    tmpobj->datatype = DFUNC;
                    expr->data.funccall.funcref->data.objref = tmpobj;
                }
            } else {
                expandTOCexpression(expr->data.funccall.funcref, NULL, 0);
            }

            for (list = expr->data.funccall.args; list; list = list->next)
                expandTOCexpression(list->node, NULL, 0);

            if (expr->hascall)
                estimate_func_param_size(expr);

            if (is_intrinsic_function_call(expr)) {
                for (list = expr->data.funccall.args; list; list = list->next)
                    expr->hascall |= list->node->hascall;
            }

            if (CMach_PassResultInHiddenArg(TYPE_FUNC(expr->data.funccall.functype)->functype))
                rewritefunctioncallreturningstruct(expr);

            break;
        case ECOMMA:
            expandTOCexpression(expr->data.diadic.left, NULL, 1);
            expandTOCexpression(expr->data.diadic.right, NULL, ignored);
            expr->hascall = expr->data.diadic.left->hascall | expr->data.diadic.right->hascall;
            break;
        case ELAND:
        case ELOR:
            if (!ENODE_IS(expr->data.diadic.left, ELOGNOT) && !ENODE_IS2(expr->data.diadic.left, ELAND, ELOR) && !ENODE_IS_RANGE(expr->data.diadic.left, ELESS, ENOTEQU))
                expr->data.diadic.left = comparewithzero(expr->data.diadic.left);
            if (!ENODE_IS(expr->data.diadic.right, ELOGNOT) && !ENODE_IS2(expr->data.diadic.right, ELAND, ELOR) && !ENODE_IS_RANGE(expr->data.diadic.right, ELESS, ENOTEQU))
                expr->data.diadic.right = comparewithzero(expr->data.diadic.right);
            expandTOCexpression(expr->data.diadic.left, NULL, 0);
            expandTOCexpression(expr->data.diadic.right, NULL, 0);
            expr->hascall = expr->data.diadic.left->hascall | expr->data.diadic.right->hascall;
            break;
        case EDIVASS:
            if (!IS_TYPE_FLOAT(expr->rtype) && IS_TYPE_FLOAT(expr->data.diadic.right->rtype))
                uses_globals = 1;
            rewrite_opassign(expr, EDIV);
            goto opassign_common;
        case EMULASS:
            if (!IS_TYPE_FLOAT(expr->rtype) && IS_TYPE_FLOAT(expr->data.diadic.right->rtype))
                uses_globals = 1;
            rewrite_opassign(expr, EMUL);
            goto opassign_common;
        case EADDASS:
            if (!IS_TYPE_FLOAT(expr->rtype) && IS_TYPE_FLOAT(expr->data.diadic.right->rtype))
                uses_globals = 1;
            rewrite_opassign(expr, EADD);
            goto opassign_common;
        case ESUBASS:
            if (!IS_TYPE_FLOAT(expr->rtype) && IS_TYPE_FLOAT(expr->data.diadic.right->rtype))
                uses_globals = 1;
            rewrite_opassign(expr, ESUB);
            goto opassign_common;
        case EMODASS:
            if (!IS_TYPE_FLOAT(expr->rtype) && IS_TYPE_FLOAT(expr->data.diadic.right->rtype))
                uses_globals = 1;
            rewrite_opassign(expr, EMODULO);
            goto opassign_common;
        case ESHLASS:
            rewrite_opassign(expr, ESHL);
            goto opassign_common;
        case ESHRASS:
            rewrite_opassign(expr, ESHR);
            goto opassign_common;
        case EANDASS:
            rewrite_opassign(expr, EAND);
            goto opassign_common;
        case EXORASS:
            rewrite_opassign(expr, EXOR);
            goto opassign_common;
        case EORASS:
            rewrite_opassign(expr, EOR);
            goto opassign_common;
        case EASS:
            if (ENODE_IS(expr->data.diadic.left, EINDIRECT))
                expr->data.diadic.left = expr->data.diadic.left->data.monadic;
        opassign_common:
            expandTOCexpression(expr->data.diadic.left, NULL, 0);
            expandTOCexpression(expr->data.diadic.right, NULL, 0);
            expr->hascall = expr->data.diadic.left->hascall | expr->data.diadic.right->hascall;
            break;
        case EEQU:
        case ENOTEQU:
            if (ENODE_IS(expr->data.diadic.right, EINTCONST) && expr->data.diadic.right->data.intval.lo == 0 && expr->data.diadic.right->data.intval.hi == 0) {
                for (tmpexpr = expr->data.diadic.left; ENODE_IS2(tmpexpr, EFORCELOAD, ETYPCON); tmpexpr = tmpexpr->data.monadic) {
                    if (!TYPE_FITS_IN_REGISTER(tmpexpr->rtype))
                        break;
                }
                if (ENODE_IS(tmpexpr, ELOGNOT) && TYPE_FITS_IN_REGISTER(tmpexpr->data.monadic->rtype)) {
                    if (ENODE_IS(expr, EEQU))
                        expr->type = ENOTEQU;
                    else
                        expr->type = EEQU;
                    expr->data.diadic.left = tmpexpr->data.monadic;
                    expandTOCexpression(expr, NULL, 0);
                    break;
                }
                if (ENODE_IS(tmpexpr, EEQU)) {
                    if (ENODE_IS(expr, EEQU))
                        tmpexpr->type = ENOTEQU;
                    *expr = *tmpexpr;
                    expandTOCexpression(expr, NULL, 0);
                    break;
                }
                if (ENODE_IS(tmpexpr, ENOTEQU)) {
                    if (ENODE_IS(expr, EEQU))
                        tmpexpr->type = EEQU;
                    *expr = *tmpexpr;
                    expandTOCexpression(expr, NULL, 0);
                    break;
                }
                if (ENODE_IS(tmpexpr, ECOND)) {
                    newexpr = COND_to_COMPARE(tmpexpr->data.cond.cond, tmpexpr->data.cond.expr1, tmpexpr->data.cond.expr2);
                    if (newexpr) {
                        *tmpexpr = *newexpr;
                        expandTOCexpression(expr, NULL, 0);
                        break;
                    }
                }
            }
        case EDIV:
            if (ENODE_IS(expr, EDIV) && ENODE_IS(expr->data.diadic.right, EFLOATCONST) && CMach_FloatIsPowerOf2(expr->data.diadic.right->data.floatval)) {
                expr->type = EMUL;
                expr->data.diadic.right->data.floatval = CMach_FloatReciprocal(expr->data.diadic.right->data.floatval);
            }
        case EMODULO:
        case ESHL:
        case ESHR:
        case ELESS:
        case EGREATER:
        case ELESSEQU:
        case EGREATEREQU:
            expandTOCexpression(expr->data.diadic.left, NULL, 0);
            expandTOCexpression(expr->data.diadic.right, NULL, 0);
            expr->hascall = expr->data.diadic.left->hascall | expr->data.diadic.right->hascall;
            if (TYPE_IS_8BYTES(expr->rtype)) {
                if (ENODE_IS2(expr, ESHL, ESHR) && !ENODE_IS(expr->data.diadic.right, EINTCONST)) {
                    expr->hascall = 1;
                    requires_frame = 1;
                    makes_call = 1;
                }
                if (ENODE_IS2(expr, EDIV, EMODULO)) {
                    if (ENODE_IS(expr->data.diadic.right, EINTCONST)) {
                        if (I8_log2n(((SInt64) expr->data.diadic.right->data.intval.hi << 32) + expr->data.diadic.right->data.intval.lo) <= 0) {
                            expr->hascall = 1;
                            requires_frame = 1;
                            makes_call = 1;
                        }
                    } else {
                        expr->hascall = 1;
                        requires_frame = 1;
                        makes_call = 1;
                    }
                }
            }
            break;
        case ESUB:
            if (ENODE_IS(expr->data.diadic.right, EINTCONST)) {
                expr->type = EADD;
                expr->data.diadic.right->data.intval = CInt64_Neg(expr->data.diadic.right->data.intval);
            }
        case EMUL:
        case EADD:
        case EAND:
        case EXOR:
        case EOR:
            expandTOCexpression(expr->data.diadic.left, type, 0);
            expandTOCexpression(expr->data.diadic.right, type, 0);
            expr->hascall = expr->data.diadic.left->hascall | expr->data.diadic.right->hascall;
            if (ENODE_IS3(expr, EMUL, EADD, ESUB) && TYPE_IS_8BYTES(expr->rtype))
                Optimize64bitMath(expr);
            if (type) {
                if (
                        ENODE_IS(expr->data.diadic.left, ETYPCON) &&
                        IS_TYPE_INT_OR_ENUM(expr->data.diadic.left->rtype) &&
                        IS_TYPE_INT_OR_ENUM(expr->data.diadic.left->data.monadic->rtype) &&
                        expr->data.diadic.left->data.monadic->rtype->size >= type->size &&
                        !TYPE_IS_8BYTES(expr->data.diadic.left->data.monadic->rtype)
                        )
                    expr->data.diadic.left = expr->data.diadic.left->data.monadic;

                if (
                        ENODE_IS(expr->data.diadic.right, ETYPCON) &&
                        IS_TYPE_INT_OR_ENUM(expr->data.diadic.right->rtype) &&
                        IS_TYPE_INT_OR_ENUM(expr->data.diadic.right->data.monadic->rtype) &&
                        expr->data.diadic.right->data.monadic->rtype->size >= type->size &&
                        !TYPE_IS_8BYTES(expr->data.diadic.right->data.monadic->rtype)
                        )
                    expr->data.diadic.right = expr->data.diadic.right->data.monadic;

                expr->rtype = type;
            }
            break;

        case ETYPCON:
            tmpexpr = expr->data.monadic;
            if ((IS_TYPE_INT_OR_ENUM(expr->rtype) && expr->rtype->size < 4) && IS_TYPE_INT_OR_ENUM(tmpexpr->rtype) && !TYPE_IS_8BYTES(tmpexpr->rtype)) {
                expandTOCexpression(tmpexpr, expr->rtype, 0);
            } else {
                expandTOCexpression(tmpexpr, NULL, expr->rtype->type == TYPEVOID);
            }

            expr->hascall = tmpexpr->hascall;
            if (IS_TYPE_INT_OR_ENUM(tmpexpr->rtype) && IS_TYPE_FLOAT(expr->rtype))
                uses_globals = 1;

            if ((TYPE_IS_8BYTES(tmpexpr->rtype) && IS_TYPE_FLOAT(expr->rtype)) || (TYPE_IS_8BYTES(expr->rtype) && IS_TYPE_FLOAT(tmpexpr->rtype))) {
                uses_globals = 1;
                expr->hascall = 1;
                requires_frame = 1;
                makes_call = 1;
            }

            if (IS_TYPE_FLOAT(tmpexpr->rtype)) {
                if (is_unsigned(expr->rtype) && expr->rtype->size == 4) {
                    expr->hascall = 1;
                    requires_frame = 1;
                    makes_call = 1;
                } else {
                    uses_globals = 1;
                }
            }

            if (IS_TYPE_VECTOR(expr->rtype) && !IS_TYPE_VECTOR(tmpexpr->rtype))
                PPCError_Error(PPCErrorStr114);
            break;

        case EPOSTINC:
            if (!expr->ignored) {
                if (IS_TYPE_FLOAT(expr->data.monadic->rtype) && is_unsigned(expr->rtype))
                    uses_globals = 1;
                expandTOCexpression(expr->data.monadic, NULL, 0);
                expr->hascall = expr->data.monadic->hascall;
                break;
            }
            expr->type = EPREINC;
        case EPREINC:
            rewrite_preincdec(expr);
            rewrite_opassign(expr, EADD);
            goto opassign_common;

        case EPOSTDEC:
            if (!expr->ignored) {
                if (IS_TYPE_FLOAT(expr->data.monadic->rtype) && is_unsigned(expr->rtype))
                    uses_globals = 1;
                expandTOCexpression(expr->data.monadic, NULL, 0);
                expr->hascall = expr->data.monadic->hascall;
                break;
            }
            expr->type = EPREDEC;
        case EPREDEC:
            rewrite_preincdec(expr);
            rewrite_opassign(expr, ESUB);
            goto opassign_common;

        case ELOGNOT:
            if (!ENODE_IS(expr->data.monadic, ELOGNOT) && !ENODE_IS2(expr->data.monadic, ELAND, ELOR) && !ENODE_IS_RANGE(expr->data.monadic, ELESS, ENOTEQU))
                expr->data.monadic = comparewithzero(expr->data.monadic);
        case EMONMIN:
        case EBINNOT:
            tmpexpr = expr->data.monadic;
            expandTOCexpression(tmpexpr, type, 0);
            expr->hascall = tmpexpr->hascall;
            if (type && ENODE_IS(expr->data.monadic, ETYPCON)) {
                if (IS_TYPE_INT_OR_ENUM(expr->data.monadic->rtype) && IS_TYPE_INT_OR_ENUM(expr->data.monadic->data.monadic->rtype)) {
                    if (expr->data.monadic->data.monadic->rtype->size >= type->size) {
                        expr->data.monadic = expr->data.monadic->data.monadic;
                        expr->rtype = type;
                    }
                }
            }
            break;

        case EINDIRECT:
        case EFORCELOAD:
        case EBITFIELD:
            tmpexpr = expr->data.monadic;
            expandTOCexpression(tmpexpr, NULL, 0);
            expr->hascall = tmpexpr->hascall;
            break;

        case EDEFINE:
            tmpexpr = expr->data.monadic;
            expandTOCexpression(tmpexpr, NULL, 0);
            expr->hascall = tmpexpr->hascall;
            break;

        case EREUSE:
            expr->hascall = expr->data.monadic->hascall;
            break;

        case ENULLCHECK:
            expandTOCexpression(expr->data.diadic.left, NULL, 0);
            expandTOCexpression(expr->data.diadic.right, NULL, 0);
            expr->hascall = expr->data.diadic.left->hascall | expr->data.diadic.right->hascall;
            break;

        case EPRECOMP:
            expr->hascall = 0;
            break;

        case ELABEL:
            obj = createcodelabel(expr->data.label);
            newexpr = lalloc(sizeof(ENode));
            memclrw(newexpr, sizeof(ENode));
            newexpr->type = EOBJREF;
            newexpr->cost = 0;
            newexpr->data.objref = obj;
            newexpr->rtype = CDecl_NewPointerType(obj->type);

            expr->type = EINDIRECT;
            expr->cost = 1;
            expr->data.monadic = newexpr;
            expr->hascall = 0;
            break;
    }
}

static void checkexceptionreferences(ExceptionAction *action) {
    for (; action; action = action->prev) {
        switch (action->type) {
            case EAT_DESTROYLOCAL:
                referenceexception(action->data.destroy_local.local);
                break;
            case EAT_DESTROYLOCALCOND:
                referenceexception(action->data.destroy_local_cond.local);
                referenceexception(action->data.destroy_local_cond.cond);
                break;
            case EAT_DESTROYLOCALOFFSET:
                referenceexception(action->data.destroy_local_offset.local);
                break;
            case EAT_DESTROYLOCALPOINTER:
                referenceexception(action->data.destroy_local_pointer.pointer);
                break;
            case EAT_DESTROYLOCALARRAY:
                referenceexception(action->data.destroy_local_array.localarray);
                break;
            case EAT_DESTROYBASE:
                referenceexception(action->data.destroy_member.objectptr); // wrong union?
                break;
            case EAT_DESTROYPARTIALARRAY:
                referenceexception(action->data.destroy_partial_array.arraypointer);
                referenceexception(action->data.destroy_partial_array.arraycounter);
                referenceexception(action->data.destroy_partial_array.element_size);
                break;
            case EAT_DESTROYMEMBER:
                referenceexception(action->data.destroy_member.objectptr);
                break;
            case EAT_DESTROYMEMBERCOND:
                referenceexception(action->data.destroy_member_cond.objectptr);
                referenceexception(action->data.destroy_member_cond.cond);
                break;
            case EAT_DESTROYMEMBERARRAY:
                referenceexception(action->data.destroy_member_array.objectptr);
                break;
            case EAT_DELETEPOINTER:
            case EAT_DELETELOCALPOINTER:
                referenceexception(action->data.delete_pointer.pointerobject);
                break;
            case EAT_DELETEPOINTERCOND:
                referenceexception(action->data.delete_pointer_cond.pointerobject);
                referenceexception(action->data.delete_pointer_cond.cond);
                break;
            case EAT_CATCHBLOCK:
                referenceexception(action->data.catch_block.catch_object);
                referenceexception(action->data.catch_block.catch_info_object);
                break;
            case EAT_ACTIVECATCHBLOCK:
                referenceexception(action->data.active_catch_block.catch_info_object);
                break;
        }
    }
}

void expandTOCreferences(Statement **stmts) {
    Statement *stmt;
    IAOperand *op;
    int i;
    InlineAsm *ia;
    VarInfo *vi;

    codelabellist = NULL;
    exceptionlist = NULL;

    for (stmt = *stmts; stmt; stmt = stmt->next) {
        curstmtvalue = stmt->value;
        if (stmt->flags & StmtFlag_1) {
            has_catch_blocks = 1;
            dynamic_stack = 1;
            requires_frame = 1;
        }

        switch (stmt->type) {
            case ST_EXPRESSION:
                expandTOCexpression(stmt->expr, NULL, 1);
                if (stmt->expr->type == ETYPCON && IS_TYPE_VOID(stmt->expr->rtype))
                    stmt->expr = stmt->expr->data.monadic;
                break;
            case ST_GOTOEXPR:
                expandTOCexpression(stmt->expr, NULL, 0);
                break;
            case ST_IFGOTO:
            case ST_IFNGOTO:
                if (stmt->expr->type < ELESS || stmt->expr->type > ENOTEQU)
                    stmt->expr = comparewithzero(stmt->expr);
                expandTOCexpression(stmt->expr, NULL, 0);
                break;
            case ST_RETURN:
                if (!stmt->expr)
                    continue;
                expandTOCexpression(
                        stmt->expr, NULL,
                        IS_TYPE_ARRAY(stmt->expr->rtype) || IS_TYPE_NONVECTOR_STRUCT(stmt->expr->rtype) || IS_TYPE_CLASS(stmt->expr->rtype) ||
                                IS_TYPE_12BYTES_MEMBERPOINTER(stmt->expr->rtype));
                break;
            case ST_SWITCH:
                uses_globals = 1;
                expandTOCexpression(stmt->expr, NULL, 0);
                break;
            case ST_ENDCATCHDTOR:
                requires_frame = 1;
                makes_call = 1;
                break;
            case ST_ASM:
                if ((ia = (InlineAsm *) stmt->expr)) {
                    if (ia->flags & IAFlag1) {
                        if (ia->opcode == IADirective_FrFree)
                            requires_frame = 1;
                    } else {
                        for (i = 0, op = ia->args; i < ia->argcount; i++, op++) {
                            if (op->type == IAOpnd_Reg) {
                                if (!op->u.reg.object) {
                                    if (op->u.reg.num == INVALID_PIC_REG)
                                        uses_globals = 1;
                                    else if (op->u.reg.effect & EffectWrite)
                                        asm_used_register(op->u.reg.rclass, op->u.reg.num);
                                } else if ((vi = Registers_GetVarInfo(op->u.reg.object))) {
                                    vi->flags |= VarInfoFlag40;
                                }
                            } else if (op->type == IAOpnd_3) {
                                uses_globals = 1;
                            }
                        }

                        if (ia->flags & IAFlag2)
                            makes_call = 1;
                    }
                }
                break;
        }

        checkexceptionreferences(stmt->dobjstack);
    }
}

void resetTOCvarinfo(void) {
    ObjectList *list;

    for (list = toclist; list; list = list->next)
        list->object->u.toc.info = CodeGen_GetNewVarInfo();
}

Boolean needdescriptor(void) {
    // completely unused, dunno what args this might take
    return 0;
}

Object *createstaticinitobject(void) {
    char buf[100];
    char *p;
    Str255 fname;
    TypeFunc *tfunc;
    Object *obj;

    COS_FileGetFSSpecInfo(&cparamblkptr->sourcefile, NULL, NULL, fname);
    sprintf(buf, "__sinit_%*.*s", -fname[0], fname[0], &fname[1]);
    for (p = &buf[1]; *p; p++) {
        if (*p == '.')
            *p = '_';
    }

    tfunc = galloc(sizeof(TypeFunc));
    memclrw(tfunc, sizeof(TypeFunc));
    tfunc->type = TYPEFUNC;
    tfunc->functype = &stvoid;
    tfunc->args = NULL;
    tfunc->flags = FUNC_DEFINED;

    obj = galloc(sizeof(Object));
    memclrw(obj, sizeof(Object));
    obj->otype = OT_OBJECT;
    obj->type = (Type *) tfunc;
    obj->name = GetHashNameNodeExport(buf);
    obj->sclass = TK_STATIC;
    obj->datatype = DFUNC;

    return obj;
}

static void estimate_func_param_size(ENode *node) {
    SInt32 work;
    ENodeList *list;
    SInt32 align;

    work = 0;
    for (list = node->data.funccall.args; list; list = list->next) {
        align = ~7 & (CMach_ArgumentAlignment(list->node->rtype) + 7);
        work += ~(align - 1) & (list->node->rtype->size + align - 1);
    }

    estimate_out_param_size(work);
}