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MWCC/compiler_and_linker/unsorted/IroExprRegeneration.c

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#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.opt_common_subs && 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.opt_common_subs)
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);
}
}
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