move lots of source files around to match their actual placement in the original treemain

1 files changed, 0 insertions, 1531 deletions

diff --git a/compiler_and_linker/unsorted/IroExprRegeneration.c b/compiler_and_linker/unsorted/IroExprRegeneration.c
deleted file mode 100644
index f63622a..0000000
--- a/compiler_and_linker/unsorted/IroExprRegeneration.c
+++ /dev/null
@@ -1,1531 +0,0 @@
-#include "compiler/IroExprRegeneration.h"
-#include "compiler/IroCSE.h"
-#include "compiler/IroDump.h"
-#include "compiler/IroFlowgraph.h"
-#include "compiler/IroLinearForm.h"
-#include "compiler/IroSubable.h"
-#include "compiler/IroTransform.h"
-#include "compiler/IROUseDef.h"
-#include "compiler/IroUtil.h"
-#include "compiler/IroVars.h"
-#include "compiler/CDecl.h"
-#include "compiler/CExpr.h"
-#include "compiler/CFunc.h"
-#include "compiler/CInt64.h"
-#include "compiler/CMachine.h"
-#include "compiler/CParser.h"
-#include "compiler/objects.h"
-
-// forward decls
-static void GetExprUses(IROLinear *linear, Boolean isEntry);
-static void RebuildPossibleCondExpression(IRONode *fnode);
-static void AddNodeAndSuccessorsRecursively(IRONodes *nodes, IRONode *fnode1, IRONode *fnode2);
-
-static Boolean FindFlowgraphNodeThatStartsWithLabel(CLabel *label, IRONode **result1, IRONode **result2) {
-    IRONode *prev;
-    IRONode *iter;
-
-    prev = IRO_FirstNode;
-    if (prev != NULL)
-        iter = prev->nextnode;
-
-    while (iter) {
-        if (iter->first->type == IROLinearLabel && iter->first->u.label.label == label) {
-            *result1 = iter;
-            *result2 = prev;
-            return 1;
-        }
-
-        prev = iter;
-        iter = iter->nextnode;
-    }
-
-    return 0;
-}
-
-static IROLinear *FindLastDiadicTopLevelAssignmentInFlowgraphNode(IRONode *fnode) {
-    IROLinear *scan;
-    IROLinear *result;
-
-    result = NULL;
-
-    for (scan = fnode->first; scan != fnode->last->next; scan = scan->next) {
-        if (scan->type == IROLinearOp2Arg && scan->nodetype == EASS && !(scan->flags & IROLF_Reffed))
-            result = scan;
-    }
-
-    return result;
-}
-
-static Boolean RewriteUse(IROUse *use, ENode *enode, IROLinear *nd, Boolean flag) {
-    IROLinear *father;
-    IROLinear *father2;
-
-    if (
-        use &&
-        use->x1C &&
-        use->linear &&
-        use->linear->type == IROLinearOperand &&
-        use->linear->u.node->type == EOBJREF &&
-        use->linear->u.node->data.objref == enode->data.objref &&
-        (father = IRO_LocateFather(use->linear)) &&
-        father->type == IROLinearOp1Arg &&
-        father->nodetype == EINDIRECT &&
-        father->rtype == nd->rtype &&
-        (father2 = IRO_LocateFather(father)) &&
-        ((father2->type != IROLinearOp1Arg && father2->type != IROLinearOp2Arg) || !IRO_IsModifyOp[father2->nodetype])
-        ) {
-        if (flag)
-            IRO_LocateFather_Cut_And_Paste(father, nd);
-        return 1;
-    }
-
-    return 0;
-}
-
-#ifdef __MWERKS__
-#pragma options align=mac68k
-#endif
-static struct {
-    jmp_buf buf;
-    UInt16 index;
-    Boolean flag;
-} scuai;
-#ifdef __MWERKS__
-#pragma options align=reset
-#endif
-
-static void StatementContainsUseAction(IROLinear *linear, Boolean isFirst) {
-    if (isFirst && linear->index == scuai.index) {
-        scuai.flag = 1;
-        longjmp(scuai.buf, 1);
-    }
-}
-
-static Boolean StatementContainsUse(IROLinear *a, IROLinear *b) {
-    memset(&scuai, 0, sizeof(scuai));
-    scuai.index = b->index;
-    scuai.flag = 0;
-
-    if (!setjmp(scuai.buf))
-        IRO_WalkInts(a, a, StatementContainsUseAction);
-
-    return scuai.flag;
-}
-
-#ifdef __MWERKS__
-#pragma options align=mac68k
-#endif
-static struct {
-    jmp_buf buf;
-    Boolean flag;
-} scseai;
-#ifdef __MWERKS__
-#pragma options align=reset
-#endif
-
-static void StatementContainsSideEffectAction(IROLinear *linear, Boolean isFirst) {
-    if (isFirst) {
-        switch (linear->type) {
-            case IROLinearOperand:
-            case IROLinearOp1Arg:
-            case IROLinearOp2Arg:
-            case IROLinearOp3Arg:
-            case IROLinearFunccall:
-            case IROLinearAsm:
-                if (IRO_HasSideEffect(linear)) {
-                    scseai.flag = 1;
-                    longjmp(scseai.buf, 1);
-                }
-                break;
-        }
-    }
-}
-
-static Boolean StatementContainsSideEffect(IROLinear *linear) {
-    memset(&scseai, 0, sizeof(scseai));
-    scseai.flag = 0;
-
-    if (!setjmp(scseai.buf))
-        IRO_WalkInts(linear, linear, StatementContainsSideEffectAction);
-
-    return scseai.flag;
-}
-
-static Boolean HasSideEffectsBeforeUse(IRONode *fnode1, IRONode *fnode2, IRONode *fnode3, IROLinear *nd, Boolean flag) {
-    IRONode *fnode;
-    IROLinear *scannd;
-    UInt16 i;
-
-    if (fnode1 != fnode3) {
-        if (flag) {
-            for (fnode = IRO_FirstNode; fnode; fnode = fnode->nextnode)
-                fnode->x3C = 0;
-        } else if (fnode1->x3C) {
-            return 0;
-        }
-        fnode1->x3C = 1;
-    }
-
-    for (scannd = fnode1->first; scannd && scannd != fnode1->last->next; scannd = scannd->next) {
-        if (!(scannd->flags & IROLF_Reffed)) {
-            if (StatementContainsUse(scannd, nd))
-                return 0;
-            if (StatementContainsSideEffect(scannd))
-                return 1;
-        }
-    }
-
-    if (fnode1 != fnode3) {
-        for (i = 0; i < fnode1->numsucc; i++) {
-            if (HasSideEffectsBeforeUse(IRO_NodeTable[fnode1->succ[i]], fnode2, fnode3, nd, 0))
-                return 1;
-        }
-    }
-
-    return 0;
-}
-
-static Boolean UsesAKilledVarBeforeUse(IRONode *fnode1, IRONode *fnode2, IRONode *fnode3, IROLinear *nd, BitVector *bv, Boolean flag) {
-    IRONode *fnode;
-    UInt16 i;
-    IROLinear *scannd;
-
-    if (fnode1 != fnode3) {
-        if (flag) {
-            for (fnode = IRO_FirstNode; fnode; fnode = fnode->nextnode)
-                fnode->x3C = 0;
-        } else if (fnode1->x3C) {
-            return 0;
-        }
-        fnode1->x3C = 1;
-    }
-
-    for (scannd = fnode1->first; scannd && scannd != fnode1->last->next; scannd = scannd->next) {
-        if (!(scannd->flags & IROLF_Reffed)) {
-            if (StatementContainsUse(scannd, nd))
-                return 0;
-            Bv_Clear(IRO_VarKills);
-            IRO_WalkInts(scannd, scannd, GetExprUses);
-            if (Bv_BitsInCommon(bv, IRO_VarKills))
-                return 1;
-        }
-    }
-
-    if (fnode1 != fnode3) {
-        for (i = 0; i < fnode1->numsucc; i++) {
-            if (UsesAKilledVarBeforeUse(IRO_NodeTable[fnode1->succ[i]], fnode2, fnode3, nd, bv, 0))
-                return 1;
-        }
-    }
-
-    return 0;
-}
-
-static void GetExprUses(IROLinear *linear, Boolean isEntry) {
-    Object *obj;
-    VarRecord *var;
-
-    if (isEntry) {
-        if (linear->type == IROLinearOperand && linear->u.node->type == EOBJREF) {
-            obj = linear->u.node->data.objref;
-            if ((linear->flags & IROLF_Ind) && (!(linear->flags & IROLF_Assigned) || (linear->flags & IROLF_Used))) {
-                if ((var = IRO_FindVar(obj, 0, 1)))
-                    Bv_SetBit(var->index, IRO_VarKills);
-            }
-        }
-    }
-}
-
-static void GetExprKills(IROLinear *linear, Boolean isEntry) {
-    if (isEntry)
-        IRO_GetKills(linear);
-}
-
-static void CheckUnorderedRegionForSideEffectsAndUses(IROLinear *nd, BitVector *bv1, BitVector *bv2, Boolean *result) {
-    if (IRO_HasSideEffect(nd)) {
-        *result = 1;
-    } else {
-        Bv_Clear(bv2);
-        Bv_Clear(IRO_VarKills);
-        IRO_WalkTree(nd, GetExprUses);
-        Bv_Or(IRO_VarKills, bv2);
-
-        if (Bv_BitsInCommon(bv1, bv2))
-            *result = 1;
-    }
-}
-
-static void CheckUnorderedRegionsForSideEffectsAndUses(IROLinear *nd1, IROLinear *nd2, BitVector *bv1, BitVector *bv2, Boolean *result) {
-    int i;
-
-    switch (nd1->type) {
-        case IROLinearOp2Arg:
-            if (nd1->nodetype != ELAND && nd1->nodetype != ELOR && nd1->nodetype != ECOMMA) {
-                if (nd1->u.diadic.left != nd2)
-                    CheckUnorderedRegionForSideEffectsAndUses(nd1->u.diadic.left, bv1, bv2, result);
-                if (nd1->u.diadic.right != nd2)
-                    CheckUnorderedRegionForSideEffectsAndUses(nd1->u.diadic.right, bv1, bv2, result);
-            }
-            break;
-        case IROLinearFunccall:
-            if (nd1->u.funccall.linear8 != nd2)
-                CheckUnorderedRegionForSideEffectsAndUses(nd1->u.funccall.linear8, bv1, bv2, result);
-            for (i = 0; !*result && i < nd1->u.funccall.argCount; i++) {
-                if (nd1->u.funccall.args[i] != nd2)
-                    CheckUnorderedRegionForSideEffectsAndUses(nd1->u.funccall.args[i], bv1, bv2, result);
-            }
-            break;
-    }
-}
-
-static Boolean CheckThenOrElseBranch(IRONode *fnode1, IRONode *fnode2, IROLinear *nd, Boolean flag) {
-    IRONode *fnode;
-    IROLinear *scannd;
-    IRONodes nodes;
-    Boolean result;
-
-    IROFlowgraph_sub_4C2140(&nodes);
-
-    for (fnode = IRO_FirstNode; fnode; fnode = fnode->nextnode)
-        fnode->x3C = 0;
-    AddNodeAndSuccessorsRecursively(&nodes, fnode1, fnode2);
-
-    while (IROFlowgraph_sub_4C2040(&nodes)) {
-        fnode = IRO_NodeTable[IROFlowgraph_sub_4C2100(&nodes)];
-        if (fnode) {
-            if (!Bv_IsBitSet(fnode1->index, fnode->dom)) {
-                result = 0;
-                goto done;
-            }
-
-            for (scannd = fnode->first; scannd && scannd != fnode->last->next; scannd = scannd->next) {
-                if (!nd || scannd != nd) {
-                    if (!flag || (scannd->type != IROLinearReturn)) {
-                        if (fnode->numpred == 2 && scannd->type == IROLinearLabel)
-                            RebuildPossibleCondExpression(fnode);
-
-                        if (scannd->type != IROLinearNop &&
-                            scannd->type != IROLinearLabel &&
-                            scannd->type != IROLinearGoto &&
-                            !(scannd->flags & IROLF_Reffed)) {
-                            result = 0;
-                            goto done;
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    result = 1;
-done:
-    IROFlowgraph_sub_4C20E0(&nodes);
-    return result;
-}
-
-static void RebuildPossibleCondExpression(IRONode *fnode) {
-    IRONode *pred1;
-    IRONode *pred2;
-    IRONode *r30;
-    IROLinear *leftAss;
-    IROLinear *rightAss;
-    IROLinear *r27;
-    IROLinear *r13;
-    IROLinear *var_58;
-    IRONode *left;
-    IRONode *right;
-    IRONode *r24;
-    ENode *r23;
-    IRODef *r22;
-    IRODef *r21;
-    IRODef *def;
-    IROUse *use;
-    UInt32 r20;
-    UInt32 r19;
-    Boolean r18;
-    Boolean r17;
-    UInt32 i;
-    Boolean compareType;
-    Type *var_60;
-    IROLinear copy1;
-    IROLinear copy2;
-    IROLinear copy3;
-
-    if (
-        !fnode ||
-        fnode->numpred != 2 ||
-        !fnode->first ||
-        fnode->first->type != IROLinearLabel
-        )
-        return;
-
-    pred1 = IRO_NodeTable[fnode->pred[0]];
-    pred2 = IRO_NodeTable[fnode->pred[1]];
-    if (
-        !pred1 || !pred2 ||
-        pred1->numsucc != 1 || pred2->numsucc != 1
-        )
-        return;
-
-    r24 = NULL;
-    for (i = 0; i < IRO_NumNodes; i++) {
-        if (
-            Bv_IsBitSet(i, fnode->dom) &&
-            (r24 = IRO_NodeTable[i]) &&
-            r24->last &&
-            (r24->last->type == IROLinearIf || r24->last->type == IROLinearIfNot) &&
-            r24->last->u.label.label &&
-            r24->numsucc == 2
-            ) {
-            if (Bv_IsBitSet(r24->succ[0], pred1->dom) &&
-                !Bv_IsBitSet(r24->succ[0], pred2->dom) &&
-                Bv_IsBitSet(r24->succ[1], pred2->dom) &&
-                !Bv_IsBitSet(r24->succ[1], pred1->dom))
-                break;
-
-            if (Bv_IsBitSet(r24->succ[0], pred2->dom) &&
-                !Bv_IsBitSet(r24->succ[0], pred1->dom) &&
-                Bv_IsBitSet(r24->succ[1], pred1->dom) &&
-                !Bv_IsBitSet(r24->succ[1], pred2->dom))
-                break;
-        }
-    }
-
-    if (i >= IRO_NumNodes)
-        return;
-
-    /*if (
-        (r30 = IRO_NodeTable[r24->succ[0]]) &&
-        r30->numpred == 1 &&
-        r30->first &&
-        r30->first->type == IROLinearLabel &&
-        r30->first->u.label.label == r24->last->u.label.label
-        ) {
-        goto ok;
-    } else if (
-        (r30 = IRO_NodeTable[r24->succ[1]]) &&
-        r30->numpred == 1 &&
-        r30->first &&
-        r30->first->type == IROLinearLabel &&
-        r30->first->u.label.label == r24->last->u.label.label
-        ) {
-        goto ok;
-    } else {
-        return;
-    }*/
-    /*if (
-        (!(r30 = IRO_NodeTable[r24->succ[0]]) ||
-        r30->numpred != 1 ||
-        !r30->first ||
-        r30->first->type != IROLinearLabel ||
-        r30->first->u.label.label != r24->last->u.label.label)
-        &&
-        (!(r30 = IRO_NodeTable[r24->succ[1]]) ||
-        r30->numpred != 1 ||
-        !r30->first ||
-        r30->first->type != IROLinearLabel ||
-        r30->first->u.label.label != r24->last->u.label.label)
-        )
-        return;*/
-    r30 = IRO_NodeTable[r24->succ[0]];
-    if (
-        r30 &&
-        r30->numpred == 1 &&
-        r30->first &&
-        r30->first->type == IROLinearLabel &&
-        r30->first->u.label.label == r24->last->u.label.label
-        ) {
-        (void)0;
-    } else {
-        r30 = IRO_NodeTable[r24->succ[1]];
-        if (
-            r30 &&
-            r30->numpred == 1 &&
-            r30->first &&
-            r30->first->type == IROLinearLabel &&
-            r30->first->u.label.label == r24->last->u.label.label
-            ) {
-        } else {
-            return;
-        }
-    }
-
-ok:
-    if (Bv_IsBitSet(r30->index, pred1->dom)) {
-        left = pred2;
-        right = pred1;
-    } else {
-        left = pred1;
-        right = pred2;
-    }
-
-    leftAss = FindLastDiadicTopLevelAssignmentInFlowgraphNode(left);
-    if (
-        !leftAss ||
-        leftAss->type != IROLinearOp2Arg ||
-        !leftAss->u.diadic.left ||
-        leftAss->u.diadic.left->type != IROLinearOp1Arg ||
-        leftAss->u.diadic.left->nodetype != EINDIRECT ||
-        !leftAss->u.diadic.left->u.monadic ||
-        leftAss->u.diadic.left->u.monadic->type != IROLinearOperand ||
-        !(r23 = leftAss->u.diadic.left->u.monadic->u.node) ||
-        !r23->rtype ||
-        !IS_TYPE_POINTER_ONLY(r23->rtype) ||
-        !r23->data.objref ||
-        is_volatile_object(r23->data.objref) ||
-        r23->data.objref->datatype != DLOCAL
-        )
-        r23 = NULL;
-
-    if (r23) {
-        rightAss = FindLastDiadicTopLevelAssignmentInFlowgraphNode(right);
-        if (
-            !rightAss ||
-            rightAss->type != IROLinearOp2Arg ||
-            !rightAss->u.diadic.left ||
-            rightAss->u.diadic.left->type != IROLinearOp1Arg ||
-            rightAss->u.diadic.left->nodetype != EINDIRECT ||
-            !rightAss->u.diadic.left->u.monadic ||
-            rightAss->u.diadic.left->u.monadic->type != IROLinearOperand ||
-            !rightAss->u.diadic.left->u.monadic->u.node ||
-            !rightAss->u.diadic.left->u.monadic->u.node->rtype ||
-            !IS_TYPE_POINTER_ONLY(rightAss->u.diadic.left->u.monadic->u.node->rtype) ||
-            rightAss->u.diadic.left->u.monadic->u.node->type != EOBJREF ||
-            rightAss->u.diadic.left->u.monadic->u.node->data.objref != r23->data.objref ||
-            rightAss->rtype != leftAss->rtype
-            )
-            r23 = NULL;
-    }
-
-    if (r23) {
-        if (!CheckThenOrElseBranch(r24->nextnode, left, leftAss, 0) || !CheckThenOrElseBranch(r30, right, rightAss, 0))
-            return;
-
-        r19 = 0;
-        r20 = 0;
-        r18 = 0;
-        r17 = 0;
-        if (!r23->data.objref->varptr || !r23->data.objref->varptr->uses || !r23->data.objref->varptr->defs) {
-            r23 = NULL;
-        } else {
-            r21 = NULL;
-            r22 = NULL;
-            for (def = r23->data.objref->varptr->defs; def && (!r22 || !r21); def = def->varnext) {
-                if (def->x18 && def->linear == leftAss)
-                    r22 = def;
-                else if (def->x18 && def->linear == rightAss)
-                    r21 = def;
-            }
-
-            if (!r22 || !r21) {
-                r23 = NULL;
-            } else {
-                for (use = r23->data.objref->varptr->uses; r23 && use; use = use->varnext) {
-                    if (use->x1C) {
-                        r20++;
-                        if (Bv_IsBitSet(r22->index, use->x18) && Bv_IsBitSet(r21->index, use->x18)) {
-                            for (i = 0; r23 && i < use->x18->size; i++) {
-                                if (i != r22->index && i != r21->index && Bv_IsBitSet(i, use->x18))
-                                    r23 = NULL;
-                            }
-
-                            if (r23 && !Bv_IsBitSet(fnode->index, use->node->dom))
-                                r23 = NULL;
-
-                            if (r23) {
-                                if (RewriteUse(use, r23, rightAss, 0))
-                                    r19++;
-                                else
-                                    r23 = NULL;
-                            }
-
-                            if (r23 && !r17)
-                                r17 = HasSideEffectsBeforeUse(fnode, fnode, use->node, use->linear, 1);
-
-                            if (r23 && !r18 && (IRO_HasSideEffect(r24->last->u.label.x4) || IRO_HasSideEffect(leftAss->u.label.x4) ||
-                                                IRO_HasSideEffect(rightAss->u.label.x4)))
-                                r18 = 1;
-                        } else if (Bv_IsBitSet(r22->index, use->x18) || Bv_IsBitSet(r21->index, use->x18)) {
-                            r23 = NULL;
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    if (!r23)
-        return;
-
-    compareType = r24->last->type == IROLinearIf;
-    r27 = r24->last->u.label.x4;
-    r13 = leftAss->u.label.x4;
-    var_58 = rightAss->u.label.x4;
-    var_60 = rightAss->rtype;
-    memcpy(&copy1, r13, sizeof(IROLinear));
-    memcpy(&copy2, rightAss, sizeof(IROLinear));
-
-    r24->last->type = IROLinearNop;
-    r24->last->expr = NULL;
-    r30->first->type = IROLinearNop;
-    r30->first->expr = NULL;
-    fnode->first->type = IROLinearNop;
-    fnode->first->expr = NULL;
-    if (left->last->type == IROLinearGoto) {
-        left->last->type = IROLinearNop;
-        left->last->expr = NULL;
-    }
-    if (right->last->type == IROLinearGoto) {
-        right->last->type = IROLinearNop;
-        right->last->expr = NULL;
-    }
-
-    if (r23) {
-        IRO_NopOut(leftAss->u.diadic.left);
-        leftAss->type = IROLinearNop;
-        leftAss->expr = NULL;
-    }
-
-    memcpy(rightAss, &copy1, sizeof(IROLinear));
-    rightAss->type = IROLinearOp3Arg;
-    rightAss->nodetype = ECOND;
-    rightAss->index = copy2.index;
-    rightAss->u.args3.a = r27;
-    rightAss->rtype = var_60;
-    rightAss->next = copy2.next;
-    if (compareType) {
-        rightAss->u.args3.b = var_58;
-        rightAss->u.args3.c = r13;
-    } else {
-        rightAss->u.args3.b = r13;
-        rightAss->u.args3.c = var_58;
-    }
-    rightAss->flags |= IROLF_Reffed;
-
-    if (r19 == 1 && !r17 && !r18 && !r23->data.objref->varptr->xB) {
-        for (use = r23->data.objref->varptr->uses; use; use = use->varnext) {
-            if (use->x1C && Bv_IsBitSet(r22->index, use->x18) && Bv_IsBitSet(r21->index, use->x18)) {
-                RewriteUse(use, r23, rightAss, 1);
-                if ((r18 = (use->linear->flags & IROLF_4000) && IRO_HasSideEffect(r27))) {
-                    IROLinear *tmp;
-                    Object *obj;
-
-                    tmp = IRO_NewLinear(IROLinearOperand);
-                    memcpy(tmp, copy2.u.diadic.left->u.monadic, sizeof(IROLinear));
-                    tmp->index = IRO_NumLinear++;
-                    tmp->rtype = r27->rtype;
-                    if (r20 == 1) {
-                        tmp->u.node->data.objref->type = r27->rtype;
-                        tmp->u.node->rtype = CDecl_NewPointerType(r27->rtype);
-                    } else {
-                        obj = create_temp_object(tmp->rtype);
-                        IRO_FindVar(obj, 1, 1);
-                        tmp->u.node = create_objectrefnode(obj);
-                    }
-                    IRO_PasteAfter(tmp, tmp, r27);
-
-                    tmp = IRO_NewLinear(IROLinearOp1Arg);
-                    memcpy(tmp, copy2.u.diadic.left, sizeof(IROLinear));
-                    tmp->index = IRO_NumLinear++;
-                    tmp->u.monadic = r27->next;
-                    tmp->rtype = r27->rtype;
-                    IRO_PasteAfter(tmp, tmp, r27->next);
-
-                    tmp = IRO_NewLinear(IROLinearOp2Arg);
-                    memcpy(tmp, &copy2, sizeof(IROLinear));
-                    tmp->index = IRO_NumLinear++;
-                    tmp->u.diadic.right = r27;
-                    tmp->u.diadic.left = r27->next->next;
-                    tmp->rtype = r27->rtype;
-                    IRO_PasteAfter(tmp, tmp, r27->next->next);
-
-                    if (r20 != 1) {
-                        tmp = copy2.u.diadic.left->u.monadic;
-                        tmp->u.node = create_objectrefnode(obj);
-                    }
-
-                    rightAss->u.args3.a = copy2.u.diadic.left;
-                    rightAss->u.args3.a->rtype = r27->rtype;
-
-                    if (r20 == 1) {
-                        r21->linear = r27->next->next;
-                        if (Bv_IsBitSet(r21->index, right->x1A)) {
-                            Bv_ClearBit(r21->index, right->x1A);
-                            Bv_SetBit(r21->index, r24->x1A);
-                        }
-                        if (Bv_IsBitSet(r21->index, right->x1E)) {
-                            Bv_ClearBit(r21->index, right->x1E);
-                            Bv_SetBit(r21->index, r24->x1E);
-                        }
-                        if (Bv_IsBitSet(r21->index, right->x22)) {
-                            Bv_ClearBit(r21->index, right->x22);
-                            Bv_SetBit(r21->index, r24->x22);
-                        }
-                    }
-                }
-            }
-        }
-
-        if (!r18) {
-            if (r20 == 1 && r23->data.objref->u.var.info) {
-                r23->data.objref->u.var.info->usage = 0;
-                r23->data.objref->u.var.info->used = 0;
-            }
-            r22->x18 = 0;
-            IRO_NopOut(copy2.u.diadic.left);
-            r21->x18 = 0;
-        }
-    } else {
-        memcpy(&copy3, fnode->first, sizeof(IROLinear));
-        memcpy(fnode->first, &copy2, sizeof(IROLinear));
-
-        fnode->first->index = copy3.index;
-        fnode->first->u.diadic.right = rightAss;
-        fnode->first->next = copy3.next;
-        r22->x18 = 0;
-        r21->linear = fnode->first;
-        if (Bv_IsBitSet(r21->index, right->x1A)) {
-            Bv_ClearBit(r21->index, right->x1A);
-            Bv_SetBit(r21->index, fnode->x1A);
-        }
-        if (Bv_IsBitSet(r21->index, right->x1E)) {
-            Bv_ClearBit(r21->index, right->x1E);
-            Bv_SetBit(r21->index, fnode->x1E);
-        }
-        if (Bv_IsBitSet(r21->index, right->x22)) {
-            Bv_ClearBit(r21->index, right->x22);
-            Bv_SetBit(r21->index, fnode->x22);
-        }
-    }
-}
-
-static void RebuildPossibleReturnCondExpression(IRONode *fnode) {
-    IRONode *succ1;
-    IRONode *succ2;
-    IROLinear *node1;
-    IROLinear *node2;
-    IROLinear *node3;
-    IRONode *r27;
-    Boolean isIf;
-    Type *type;
-    IROList list;
-
-    if (
-        !fnode ||
-        fnode->numsucc != 2 ||
-        !fnode->last ||
-        (fnode->last->type != IROLinearIf && fnode->last->type != IROLinearIfNot)
-        )
-        return;
-
-    succ1 = IRO_NodeTable[fnode->succ[0]];
-    succ2 = IRO_NodeTable[fnode->succ[1]];
-    if (
-        !succ1 || !succ2 ||
-        succ1->numsucc != 0 || succ1->numpred != 1 ||
-        succ2->numsucc != 0 || succ2->numpred != 1
-        )
-        return;
-
-    if (succ1->first && succ1->first->type == IROLinearLabel && succ1->first->u.label.label == fnode->last->u.label.label) {
-        r27 = succ1;
-    } else if (succ2->first && succ2->first->type == IROLinearLabel && succ2->first->u.label.label == fnode->last->u.label.label) {
-        r27 = succ2;
-    } else {
-        return;
-    }
-
-    if (r27->numpred != 1)
-        return;
-
-    if (!CheckThenOrElseBranch(fnode->nextnode, fnode->nextnode, NULL, 1) || !CheckThenOrElseBranch(r27, r27, NULL, 1))
-        return;
-
-    if (
-        !fnode->nextnode->last ||
-        fnode->nextnode->last->type != IROLinearReturn ||
-        !fnode->nextnode->last->u.monadic ||
-        !r27->last ||
-        r27->last->type != IROLinearReturn ||
-        !r27->last->u.monadic ||
-        !IRO_TypesEqual(fnode->nextnode->last->u.monadic->rtype, r27->last->u.monadic->rtype)
-        )
-        return;
-
-    isIf = fnode->last->type == IROLinearIf;
-    node1 = fnode->last->u.diadic.right;
-    node2 = fnode->nextnode->last->u.diadic.left;
-    node3 = r27->last->u.diadic.left;
-    type = node2->rtype;
-
-    fnode->last->type = IROLinearNop;
-    fnode->last->expr = NULL;
-    r27->last->type = IROLinearNop;
-    r27->last->expr = NULL;
-    r27->first->type = IROLinearNop;
-    r27->first->expr = NULL;
-
-    if (IRO_IsIntConstant(node2) && IRO_IsIntConstant(node3) &&
-        ((IRO_IsConstantOne(node2) && IRO_IsConstantZero(node3)) ||
-         (IRO_IsConstantZero(node2) && IRO_IsConstantOne(node3)))) {
-        if (!(node1->type == IROLinearOp1Arg && node1->nodetype == ELOGNOT && node1->rtype == type)) {
-            IROLinear *tmp1;
-            IROLinear *tmp2;
-
-            tmp1 = IRO_NewLinear(IROLinearOp1Arg);
-            memcpy(tmp1, node2, sizeof(IROLinear));
-            tmp1->type = IROLinearOp1Arg;
-            tmp1->nodetype = ELOGNOT;
-            tmp1->index = IRO_NumLinear++;
-            tmp1->u.monadic = node1;
-
-            tmp1->next = tmp2 = IRO_NewLinear(IROLinearOp1Arg);
-            memcpy(tmp2, node2, sizeof(IROLinear));
-            tmp2->type = IROLinearOp1Arg;
-            tmp2->nodetype = ELOGNOT;
-            tmp2->index = IRO_NumLinear++;
-            tmp2->u.monadic = tmp1;
-
-            IRO_PasteAfter(tmp1, tmp2, node1);
-            node1 = tmp2;
-        }
-
-        if ((IRO_IsConstantZero(node2) && !isIf) || (IRO_IsConstantOne(node2) && isIf)) {
-            if (node1->type == IROLinearOp1Arg && node1->nodetype == ELOGNOT && node1->rtype == node1->u.monadic->rtype) {
-                IROLinear *tmp = node1;
-                node1 = node1->u.monadic;
-                tmp->type = IROLinearNop;
-                tmp->expr = NULL;
-            } else {
-                IROLinear *tmp = IRO_NewLinear(IROLinearOp1Arg);
-                memcpy(tmp, node2, sizeof(IROLinear));
-                tmp->type = IROLinearOp1Arg;
-                tmp->nodetype = ELOGNOT;
-                tmp->index = IRO_NumLinear++;
-                tmp->u.monadic = node1;
-                IRO_PasteAfter(tmp, tmp, node1);
-                node1 = tmp;
-            }
-        }
-
-        node2->type = IROLinearNop;
-        node2->expr = NULL;
-        node3->type = IROLinearNop;
-        node3->expr = NULL;
-        fnode->nextnode->last->u.monadic = node1;
-    } else {
-        IROLinear *tmp1;
-        IROLinear *tmp2;
-
-        IRO_InitList(&list);
-        tmp1 = IRO_DuplicateExpr(node3, &list);
-        IRO_NopOut(node3);
-        IRO_Paste(list.head, list.tail, fnode->nextnode->last);
-
-        tmp2 = IRO_NewLinear(IROLinearOp3Arg);
-        memcpy(tmp2, node2, sizeof(IROLinear));
-        tmp2->type = IROLinearOp3Arg;
-        tmp2->nodetype = ECOND;
-        tmp2->index = IRO_NumLinear++;
-        tmp2->u.args3.a = node1;
-        tmp2->rtype = type;
-        IRO_Paste(tmp2, tmp2, fnode->nextnode->last);
-
-        if (isIf) {
-            tmp2->u.args3.b = tmp1;
-            tmp2->u.args3.c = node2;
-        } else {
-            tmp2->u.args3.b = node2;
-            tmp2->u.args3.c = tmp1;
-        }
-
-        fnode->nextnode->last->u.monadic = tmp2;
-    }
-}
-
-static void RebuildCondExpressions(void) {
-    IRONode *fnode;
-
-    for (fnode = IRO_FirstNode; fnode; fnode = fnode->nextnode) {
-        if (fnode->numpred == 2) {
-            if (fnode->first && fnode->first->type == IROLinearLabel)
-                RebuildPossibleCondExpression(fnode);
-        } else if (fnode->numsucc == 2) {
-            if (fnode->last && (fnode->last->type == IROLinearIf || fnode->last->type == IROLinearIfNot))
-                RebuildPossibleReturnCondExpression(fnode);
-        }
-    }
-
-    IRO_CheckForUserBreak();
-}
-
-static Boolean IsLogicalExpressionAssign(IROLinear *nd) {
-    IROLinear *right;
-    IROLinear *left;
-
-    return (
-        nd->type == IROLinearOp2Arg &&
-        nd->nodetype == EASS &&
-        (left = nd->u.diadic.left) &&
-        (right = nd->u.diadic.right) &&
-        right->type == IROLinearOperand &&
-        right->u.node &&
-        right->u.node->type == EINTCONST &&
-        (CInt64_Equal(right->u.node->data.intval, cint64_one) || CInt64_Equal(right->u.node->data.intval, cint64_zero)) &&
-        left->type == IROLinearOp1Arg &&
-        left->nodetype == EINDIRECT &&
-        left->u.monadic &&
-        IS_TYPE_POINTER_ONLY(left->u.monadic->rtype) &&
-        left->u.monadic->type == IROLinearOperand &&
-        left->u.monadic->u.node &&
-        left->u.monadic->u.node->type == EOBJREF &&
-        left->u.monadic->u.node->data.objref &&
-        left->u.monadic->u.node->data.objref->datatype == DLOCAL);
-}
-
-static Boolean IsPossibleLogicalExpressionStart(IRONode *fnode, IROLinear *nd) {
-    return
-        fnode->numsucc == 2 &&
-        fnode->last &&
-        (fnode->last->type == IROLinearIf || fnode->last->type == IROLinearIfNot) &&
-        IsLogicalExpressionAssign(nd);
-}
-
-static Boolean CheckForTopLevelExpressions(IRONode *fnode1, IRONode *fnode2, IRONode *fnode3, IROLinear *nd1, IROLinear *nd2, Boolean flag) {
-    IRONode *fnode;
-    IROLinear *nd;
-    UInt16 i;
-
-    if (fnode1 != fnode3) {
-        if (!Bv_IsBitSet(fnode2->index, fnode1->dom))
-            return 0;
-
-        if (flag) {
-            for (fnode = IRO_FirstNode; fnode; fnode = fnode->nextnode)
-                fnode->x3C = 0;
-        } else if (fnode1->x3C) {
-            return 1;
-        }
-        fnode1->x3C = 1;
-
-        for (i = 0; i < fnode1->numsucc; i++) {
-            fnode = IRO_NodeTable[fnode1->succ[i]];
-            if (!CheckForTopLevelExpressions(fnode, fnode2, fnode3, fnode->first, nd2, 0))
-                return 0;
-        }
-    }
-
-    for (nd = nd1; nd && nd != fnode1->last->next; nd = nd->next) {
-        if (nd == nd2)
-            return 1;
-
-        if (nd->type != IROLinearNop && nd->type != IROLinearLabel && !(nd->flags & IROLF_Reffed))
-            return 0;
-    }
-
-    return 1;
-}
-
-static void AddNodeAndSuccessorsRecursively(IRONodes *nodes, IRONode *fnode1, IRONode *fnode2) {
-    UInt16 i;
-
-    if (fnode1 && !fnode1->x3C) {
-        fnode1->x3C = 1;
-        IROFlowgraph_sub_4C3880(nodes, fnode1->index);
-        if (fnode1 != fnode2) {
-            for (i = 0; i < fnode1->numsucc; i++)
-                AddNodeAndSuccessorsRecursively(nodes, IRO_NodeTable[fnode1->succ[i]], fnode2);
-        }
-    }
-}
-
-static Boolean RebuildPossibleLogicalExpression(IRONode *fnode, IROLinear *nd) {
-    IROUse *use;
-    IROLinear *nd2;
-    IROLinear *left;
-    IROLinear *right;
-    IRONode *r25;
-    IRONode *r24;
-    ENode *objnode;
-    IRODef *def1;
-    IRODef *def2;
-    UInt32 useCount;
-    UInt32 rewrittenUseCount;
-    Boolean sideEffectFlag;
-    IROLinearType compareType;
-    CLabel *somelab;
-    IRONode *var_68;
-    IRONode *var_6C;
-    CInt64 compareVal;
-    Boolean killedFlag;
-    BitVector *bv1;
-    BitVector *bv2;
-
-    IROLinear *father;
-    IROLinear *iter;
-    IRODef *def;
-    UInt32 i;
-    IROLinear *newlin;
-
-    objnode = nd->u.diadic.left->u.monadic->u.node;
-    if (!objnode->data.objref->varptr)
-        return 0;
-
-    if (CInt64_Equal(nd->u.diadic.right->u.node->data.intval, cint64_zero)) {
-        compareType = IROLinearIfNot;
-        compareVal = cint64_one;
-    } else {
-        compareType = IROLinearIf;
-        compareVal = cint64_zero;
-    }
-
-    var_68 = NULL;
-    def1 = NULL;
-    for (def = objnode->data.objref->varptr->defs; def && !def1; def = def->varnext) {
-        if (def->x18 && def->linear == nd)
-            def1 = def;
-    }
-
-    if (def1) {
-        for (use = objnode->data.objref->varptr->uses; use; use = use->varnext) {
-            if (use->x1C == 2 && Bv_IsBitSet(def1->index, use->x18)) {
-                if (!var_68) {
-                    var_68 = use->node;
-                } else if (Bv_IsBitSet(use->node->index, var_68->dom)) {
-                    var_68 = use->node;
-                }
-            }
-        }
-
-        if (var_68) {
-            for (use = objnode->data.objref->varptr->uses; use; use = use->varnext) {
-                if (use->node != var_68 && use->x1C == 2 && Bv_IsBitSet(def1->index, use->x18) && !Bv_IsBitSet(var_68->index, use->node->dom)) {
-                    var_68 = NULL;
-                    break;
-                }
-            }
-        }
-    }
-
-    if (
-        !var_68 ||
-        !var_68->first ||
-        var_68->first->type != IROLinearLabel ||
-        !(somelab = var_68->first->u.label.label) ||
-        var_68->numpred != 3
-        )
-        return 0;
-
-    r25 = IRO_NodeTable[var_68->pred[0]];
-    if (Bv_IsBitSet(IRO_NodeTable[var_68->pred[1]]->index, r25->dom)) {
-        r25 = IRO_NodeTable[var_68->pred[1]];
-    } else if (!Bv_IsBitSet(r25->index, IRO_NodeTable[var_68->pred[1]]->dom)) {
-        return 0;
-    }
-
-    if (Bv_IsBitSet(IRO_NodeTable[var_68->pred[2]]->index, r25->dom)) {
-        r25 = IRO_NodeTable[var_68->pred[2]];
-    } else if (!Bv_IsBitSet(r25->index, IRO_NodeTable[var_68->pred[2]]->dom)) {
-        return 0;
-    }
-
-    if (
-        !r25 ||
-        !(left = r25->last) ||
-        left->type != compareType ||
-        left->u.label.label != somelab
-        )
-        return 0;
-
-    if (
-        !FindFlowgraphNodeThatStartsWithLabel(left->u.label.label, &var_68, &var_6C) ||
-        !var_6C ||
-        var_6C->numpred != 1 ||
-        !(r24 = IRO_NodeTable[var_6C->pred[0]]) ||
-        !(right = r24->last) ||
-        right->type != compareType ||
-        right->u.label.label != left->u.label.label ||
-        !(nd2 = FindLastDiadicTopLevelAssignmentInFlowgraphNode(var_6C)) ||
-        !IsLogicalExpressionAssign(nd2) ||
-        nd2->u.diadic.left->u.monadic->u.node->data.objref != objnode->data.objref ||
-        !CInt64_Equal(compareVal, nd2->u.diadic.right->u.node->data.intval) ||
-        nd2->rtype != nd->rtype
-        )
-        return 0;
-
-    if (
-        !CheckForTopLevelExpressions(fnode, fnode, r25, nd->next, left, 1) ||
-        !CheckForTopLevelExpressions(r25->nextnode, r25->nextnode, r24, r25->nextnode->first, right, 1) ||
-        !CheckForTopLevelExpressions(r24->nextnode, r24->nextnode, var_6C, right->next, nd2, 1) ||
-        !CheckForTopLevelExpressions(var_6C, var_6C, var_6C, nd2->next, var_68->first, 1)
-        )
-        return 0;
-
-    rewrittenUseCount = 0;
-    useCount = 0;
-    killedFlag = 0;
-    sideEffectFlag = 0;
-    if (!objnode->data.objref->varptr || !(objnode->data.objref->varptr->uses) || !(objnode->data.objref->varptr->defs)) {
-        objnode = NULL;
-    } else {
-        def1 = def2 = NULL;
-        for (def = objnode->data.objref->varptr->defs; def && (!def1 || !def2); def = def->varnext) {
-            if (def->x18 && def->linear == nd)
-                def1 = def;
-            else if (def->x18 && def->linear == nd2)
-                def2 = def;
-        }
-
-        if (!def1 || !def2) {
-            objnode = NULL;
-        } else {
-            for (use = objnode->data.objref->varptr->uses; objnode && use; use = use->varnext) {
-                if (use->x1C) {
-                    useCount++;
-                    if (Bv_IsBitSet(def1->index, use->x18) && Bv_IsBitSet(def2->index, use->x18)) {
-                        for (i = 0; objnode && i < use->x18->size; i++) {
-                            if (i != def1->index && i != def2->index && Bv_IsBitSet(i, use->x18))
-                                objnode = NULL;
-                        }
-
-                        if (objnode && !Bv_IsBitSet(var_68->index, use->node->dom))
-                            objnode = NULL;
-
-                        if (objnode) {
-                            if (RewriteUse(use, objnode, nd2, 0))
-                                rewrittenUseCount++;
-                            else
-                                objnode = NULL;
-                        }
-
-                        if (objnode) {
-                            if (!sideEffectFlag)
-                                sideEffectFlag = HasSideEffectsBeforeUse(var_68, var_68, use->node, use->linear, 1);
-
-                            if (!killedFlag && (IRO_HasSideEffect(left->u.label.x4) || IRO_HasSideEffect(right->u.label.x4))) {
-                                iter = use->linear;
-                                if ((father = IRO_LocateFather(use->linear))) {
-                                    Bv_AllocVector(&bv1, IRO_NumVars + 1);
-                                    Bv_AllocVector(&bv2, IRO_NumVars + 1);
-                                    Bv_AllocVector(&IRO_VarKills, IRO_NumVars + 1);
-                                    IRO_WalkTree(left->u.label.x4, GetExprKills);
-                                    IRO_WalkTree(right->u.label.x4, GetExprKills);
-                                    Bv_Or(IRO_VarKills, bv1);
-                                    while (father && !killedFlag) {
-                                        CheckUnorderedRegionsForSideEffectsAndUses(father, iter, bv1, bv2, &killedFlag);
-                                        iter = father;
-                                        father = IRO_LocateFather(father);
-                                    }
-                                }
-
-                                if (!killedFlag)
-                                    killedFlag = UsesAKilledVarBeforeUse(var_68, var_68, use->node, use->linear, bv1, 1);
-                            }
-                        }
-                    } else if (Bv_IsBitSet(def1->index, use->x18) || Bv_IsBitSet(def2->index, use->x18))
-                        objnode = NULL;
-                }
-            }
-        }
-    }
-
-    if (!objnode)
-        return 0;
-
-    left->type = right->type = IROLinearNop;
-    left->expr = right->expr = NULL;
-
-    IRO_NopOut(nd);
-
-    newlin = IRO_NewLinear(IROLinearOp2Arg);
-    memcpy(newlin, nd2, sizeof(IROLinear));
-    newlin->nodetype = (compareType == IROLinearIf) ? ELOR : ELAND;
-    newlin->index = IRO_NumLinear++;
-    newlin->u.diadic.left = left->u.label.x4;
-    newlin->u.diadic.right = right->u.label.x4;
-    newlin->flags |= IROLF_Reffed;
-    IRO_Paste(newlin, newlin, nd2);
-
-    if (rewrittenUseCount == 1 && !sideEffectFlag && !killedFlag && !objnode->data.objref->varptr->xB) {
-        for (use = objnode->data.objref->varptr->uses; use; use = use->varnext) {
-            if (use->x1C && Bv_IsBitSet(def1->index, use->x18) && Bv_IsBitSet(def2->index, use->x18))
-                RewriteUse(use, objnode, newlin, 1);
-        }
-
-        if (useCount == 1 && objnode->data.objref->u.var.info) {
-            objnode->data.objref->u.var.info->usage = 0;
-            objnode->data.objref->u.var.info->used = 0;
-        }
-        IRO_NopOut(nd2);
-        def1->x18 = 0;
-        def2->x18 = 0;
-    } else {
-        IRO_NopOut(nd2->u.label.x4);
-        nd2->u.label.x4 = newlin;
-        def1->x18 = 0;
-    }
-
-    if (r24->numpred == 1 && IRO_NodeTable[r24->pred[0]] == r25 && IRO_MergeFlowGraphNodes(r25, r24))
-        r24 = r25;
-    if (var_6C->numpred == 1 && IRO_NodeTable[var_6C->pred[0]] == r24 && IRO_MergeFlowGraphNodes(r24, var_6C))
-        var_6C = r24;
-    if (var_68->numpred == 1 && r24 == r25 && var_6C == r24)
-        IRO_MergeFlowGraphNodes(var_6C, var_68);
-    return 1;
-}
-
-static void RebuildLogicalExpressions(void) {
-    IRONode *fnode;
-    IROLinear *nd;
-    Boolean flag;
-
-    flag = 1;
-    while (flag) {
-        flag = 0;
-        for (fnode = IRO_FirstNode; fnode && fnode->last; fnode = fnode->nextnode) {
-            for (nd = fnode->first; nd && nd != fnode->last->next; nd = nd->next) {
-                if (IsPossibleLogicalExpressionStart(fnode, nd) && RebuildPossibleLogicalExpression(fnode, nd))
-                    flag = 1;
-            }
-        }
-    }
-
-    IRO_CheckForUserBreak();
-}
-
-static Boolean IsPossibleCondAssStart(IRONode *fnode) {
-    return (fnode->numsucc == 2) && fnode->last && (fnode->last->type == IROLinearIf || fnode->last->type == IROLinearIfNot);
-}
-
-static Type *logicalType(void) {
-    if (copts.cplusplus && copts.booltruefalse)
-        return TYPE(&stbool);
-    else
-        return TYPE(&stsignedint);
-}
-
-static Boolean GeneratePossibleCondAss(IRONode *fnode) {
-    IROLinear *r31;
-    IRONode *node2;
-    IRONode *r29;
-    Boolean r28;
-    IRONode *node1;
-    IROLinear *r24;
-    Boolean r23;
-    IROLinear *r19;
-    Boolean r18;
-    IROLinear *r20;
-    Boolean r19flag;
-    IROLinear *r18nd;
-    IROLinear *ass;
-    IROLinear *cond;
-    IROLinear *r16;
-    IROLinear *r15;
-    BitVector *saveVarKills;
-    IROList list;
-    Object *obj;
-    IROLinear *r14;
-
-    if (!fnode || fnode->numsucc != 2 || !fnode->last || (fnode->last->type != IROLinearIf && fnode->last->type != IROLinearIfNot))
-        return 0;
-
-    if (IRO_NodeTable[fnode->succ[0]] &&
-        IRO_NodeTable[fnode->succ[0]]->first &&
-        IRO_NodeTable[fnode->succ[0]]->first->type == IROLinearLabel &&
-        IRO_NodeTable[fnode->succ[0]]->first->u.label.label == fnode->last->u.label.label) {
-        node1 = IRO_NodeTable[fnode->succ[0]];
-        node2 = IRO_NodeTable[fnode->succ[1]];
-    } else {
-        node1 = IRO_NodeTable[fnode->succ[1]];
-        if (node1 && node1->first && node1->first->type == IROLinearLabel && node1->first->u.label.label == fnode->last->u.label.label) {
-            node2 = IRO_NodeTable[fnode->succ[0]];
-        } else {
-            return 0;
-        }
-    }
-
-    if (!node2 || node2->numpred != 1 || node2->numsucc != 1 || node2->last->next != node1->first)
-        return 0;
-
-    if (IRO_NodeTable[node2->succ[0]] == node1 && Bv_IsBitSet(fnode->index, node1->dom)) {
-        r28 = 0;
-    } else if (
-        node1->numpred == 1 && node1->numsucc == 1 &&
-        node2->succ[0] == node1->succ[0] &&
-        (r29 = IRO_NodeTable[node2->succ[0]]) &&
-        Bv_IsBitSet(fnode->index, r29->dom) &&
-        node1->last->next == r29->first
-        ) {
-        r28 = 1;
-    } else {
-        return 0;
-    }
-
-    r24 = NULL;
-    if (node2->last) {
-        for (r19 = node2->first; r19 && r19 != node2->last->next; r19 = r19->next) {
-            if (IRO_IsAssignment(r19) && !(r19->flags & IROLF_Reffed) && !r24) {
-                r24 = r19;
-            } else if (r19->type != IROLinearNop && r19->type != IROLinearLabel && r19->type != IROLinearGoto && !(r19->flags & IROLF_Reffed)) {
-                return 0;
-            }
-        }
-    }
-
-    if (
-        !r24 ||
-            (r24->nodetype != EASS && !IRO_TransformSelfAssignmentToAssignment(r24)) ||
-            !r24->u.diadic.left ||
-            r24->u.diadic.left->type != IROLinearOp1Arg ||
-            r24->u.diadic.left->nodetype != EINDIRECT ||
-            !r24->u.diadic.left->u.monadic ||
-            r24->u.diadic.left->u.monadic->type != IROLinearOperand ||
-            !r24->u.diadic.left->u.monadic->u.node ||
-            !r24->u.diadic.left->u.monadic->u.node->rtype ||
-            !IS_TYPE_POINTER_ONLY(r24->u.diadic.left->u.monadic->u.node->rtype) ||
-            !r24->u.diadic.left->u.monadic->u.node->data.monadic
-        )
-        return 0;
-
-    if (r28) {
-        r31 = NULL;
-        if (node1->last) {
-            for (r19 = node1->first; r19 && r19 != node1->last->next; r19 = r19->next) {
-                if (IRO_IsAssignment(r19) && !(r19->flags & IROLF_Reffed) && !r31) {
-                    r31 = r19;
-                } else if (r19->type != IROLinearNop && r19->type != IROLinearLabel && r19->type != IROLinearGoto && !(r19->flags & IROLF_Reffed)) {
-                    return 0;
-                }
-            }
-        }
-
-        if (
-            !r31 ||
-            (r31->nodetype != EASS && !IRO_TransformSelfAssignmentToAssignment(r31)) ||
-            !r31->u.diadic.left ||
-            r31->u.diadic.left->type != IROLinearOp1Arg ||
-            r31->u.diadic.left->nodetype != EINDIRECT ||
-            !r31->u.diadic.left->u.monadic ||
-            r31->u.diadic.left->u.monadic->type != IROLinearOperand ||
-            !r31->u.diadic.left->u.monadic->u.node ||
-            !r31->u.diadic.left->u.monadic->u.node->rtype ||
-            !IS_TYPE_POINTER_ONLY(r31->u.diadic.left->u.monadic->u.node->rtype) ||
-            !r31->u.diadic.left->u.monadic->u.node->data.monadic
-            )
-            return 0;
-
-        r18 = IRO_ExprsSame(r24->u.diadic.left, r31->u.diadic.left);
-    }
-
-    r23 = fnode->last->type == IROLinearIf;
-    r20 = fnode->last->u.diadic.right;
-    r19flag = 0;
-    if (r28 && copts.commonsubs && IRO_IsSubableExpression(r20))
-        r19flag = 1;
-
-    if (r19flag) {
-        IRO_FindDepends(r20);
-        r19flag = !IRO_NotSubable;
-    }
-
-    if (r28) {
-        if (r18) {
-            r19flag = 0;
-        } else if (IRO_HasSideEffect(r20)) {
-            r19flag = 1;
-        } else {
-            Bv_AllocVector(&IRO_VarKills, IRO_NumVars + 1);
-            IRO_WalkTree(r20, GetExprUses);
-            saveVarKills = IRO_VarKills;
-            Bv_AllocVector(&IRO_VarKills, IRO_NumVars + 1);
-            IRO_WalkTree(r20, GetExprKills);
-            if (Bv_BitsInCommon(IRO_VarKills, saveVarKills))
-                r19flag = 1;
-        }
-
-        if (r19flag && !copts.commonsubs)
-            return 0;
-    }
-
-    if (r19flag) {
-        IRO_InitList(&list);
-        obj = create_temp_object(r20->rtype);
-        IRO_FindVar(obj, 1, 1);
-        ass = IRO_NewLinear(IROLinearOp2Arg);
-        ass->u.diadic.left = IRO_TempReference(obj, &list);
-        ass->rtype = r20->rtype;
-        ass->nodetype = EASS;
-        ass->index = ++IRO_NumLinear;
-        ass->u.diadic.left->flags |= IROLF_Ind | IROLF_Assigned;
-        ass->u.diadic.left->u.monadic->flags |= IROLF_Ind | IROLF_Assigned;
-        ass->u.diadic.right = r20;
-        IRO_AddToList(ass, &list);
-        IRO_PasteAfter(list.head, list.tail, r20);
-    }
-
-    r16 = r24->u.diadic.left;
-    r15 = r24->u.diadic.right;
-    fnode->last->type = IROLinearNop;
-    fnode->last->expr = NULL;
-    if (node2->last->type == IROLinearGoto) {
-        node2->last->type = IROLinearNop;
-        node2->last->expr = NULL;
-    }
-    if (r28 || node1->numpred == 2) {
-        node1->first->type = IROLinearNop;
-        node1->first->expr = NULL;
-    }
-
-    if (r28 && r18) {
-        if (node1->last->type == IROLinearGoto) {
-            node1->last->type = IROLinearNop;
-            node1->last->expr = NULL;
-        }
-        if (r29->numpred == 2) {
-            r29->first->type = IROLinearNop;
-            r29->first->expr = NULL;
-        }
-
-        cond = IRO_NewLinear(IROLinearOp3Arg);
-        memcpy(cond, r24, sizeof(IROLinear));
-        cond->type = IROLinearOp3Arg;
-        cond->nodetype = ECOND;
-        cond->index = ++IRO_NumLinear;
-        cond->rtype = r16->rtype;
-        cond->flags |= IROLF_Reffed;
-        if (r19flag) {
-            IRO_InitList(&list);
-            r14 = IRO_TempReference(obj, &list);
-            IRO_Paste(list.head, list.tail, r31);
-        } else {
-            r14 = r20;
-        }
-        cond->u.args3.a = r14;
-
-        if (r23) {
-            cond->u.args3.b = r31->u.diadic.right;
-            cond->u.args3.c = r15;
-        } else {
-            cond->u.args3.b = r15;
-            cond->u.args3.c = r31->u.diadic.right;
-        }
-
-        r24->type = IROLinearNop;
-        r24->expr = NULL;
-        IRO_NopOut(r24->u.diadic.left);
-        IRO_Paste(cond, cond, r31);
-        r31->u.diadic.right = cond;
-    } else {
-        r24->type = IROLinearOp3Arg;
-        r24->nodetype = ECONDASS;
-        if (r19flag) {
-            IRO_InitList(&list);
-            r20 = IRO_TempReference(obj, &list);
-            IRO_Paste(list.head, list.tail, r24);
-        }
-        cond = r20;
-        if (r23) {
-            r18nd = IRO_NewLinear(IROLinearOp1Arg);
-            memcpy(r18nd, r20, sizeof(IROLinear));
-            r18nd->type = IROLinearOp1Arg;
-            r18nd->nodetype = ELOGNOT;
-            r18nd->index = ++IRO_NumLinear;
-            r18nd->rtype = logicalType();
-            r18nd->u.monadic = r20;
-            r18nd->flags |= IROLF_Reffed;
-            IRO_Paste(r18nd, r18nd, r24);
-            r20 = r18nd;
-        }
-        r24->u.args3.a = r20;
-        r24->u.args3.b = r16;
-        r24->u.args3.c = r15;
-        if (r28) {
-            r15 = r31->u.diadic.left;
-            r16 = r31->u.diadic.right;
-            if (node1->last->type == IROLinearGoto) {
-                node1->last->type = IROLinearNop;
-                node1->last->expr = NULL;
-            }
-            if (r29->numpred == 2) {
-                r29->first->type = IROLinearNop;
-                r29->first->expr = NULL;
-            }
-            r31->type = IROLinearOp3Arg;
-            r31->nodetype = ECONDASS;
-            if (r19flag) {
-                IRO_InitList(&list);
-                cond = IRO_TempReference(obj, &list);
-                IRO_Paste(list.head, list.tail, r31);
-            } else {
-                IRO_InitList(&list);
-                cond = IRO_DuplicateExpr(cond, &list);
-                IRO_Paste(list.head, list.tail, r31);
-            }
-            if (!r23) {
-                r14 = IRO_NewLinear(IROLinearOp1Arg);
-                memcpy(r14, cond, sizeof(IROLinear));
-                r14->type = IROLinearOp1Arg;
-                r14->nodetype = ELOGNOT;
-                r14->index = ++IRO_NumLinear;
-                r14->rtype = logicalType();
-                r14->u.monadic = cond;
-                r14->flags |= IROLF_Reffed;
-                IRO_Paste(r14, r14, r31);
-                cond = r14;
-            }
-            r31->u.args3.a = cond;
-            r31->u.args3.b = r15;
-            r31->u.args3.c = r16;
-        }
-    }
-
-    if (IRO_MergeFlowGraphNodes(fnode, node2))
-        node2 = fnode;
-    if ((r28 || node1->numpred == 1) && IRO_MergeFlowGraphNodes(node2, node1))
-        node1 = node2;
-    if (r28 && r29->numpred == 1)
-        IRO_MergeFlowGraphNodes(node1, r29);
-    return 1;
-}
-
-static void GenerateCondAssignments(void) {
-    IRONode *fnode;
-
-    fnode = IRO_FirstNode;
-    while (fnode && fnode->last) {
-        if (IsPossibleCondAssStart(fnode)) {
-            if (!GeneratePossibleCondAss(fnode))
-                fnode = fnode->nextnode;
-        } else {
-            fnode = fnode->nextnode;
-        }
-    }
-
-    IRO_CheckForUserBreak();
-}
-
-void IRO_RegenerateExpressions(void) {
-    IRO_UpdateFlagsOnInts();
-    IRO_ComputeSuccPred();
-    IRO_ComputeDom();
-    IRO_UseDef(0, 0);
-
-    if (copts.optimizationlevel > 0) {
-        IRO_Dump("Rebuilding ELORs and ELANDs\n");
-        RebuildLogicalExpressions();
-        IRO_DumpAfterPhase("RebuildLogicalExpressions", 0);
-    }
-
-    if (copts.optimizationlevel > 0) {
-        IRO_Dump("Rebuilding ECONDs\n");
-        RebuildCondExpressions();
-        IRO_DumpAfterPhase("RebuildCondExpressions", 0);
-    }
-
-    if (copts.optimizationlevel > 0) {
-        IRO_Dump("Generating ECONDASSes\n");
-        GenerateCondAssignments();
-        IRO_DumpAfterPhase("GenerateCondAssignments", 0);
-    }
-}