SymbolicVal ApplyBinOP( SymOpType t, const SymbolicVal &v1,
const SymbolicVal &v2)
{
SymbolicVal r;
switch (t) {
case SYMOP_PLUS:
{
PlusApplicator op;
r = ApplyBinOP(op, v1, v2);
if (DebugOp())
std::cerr << v1.toString() << " + " << v2.toString() << " = " << r.toString() << std::endl;
return r;
}
case SYMOP_MULTIPLY:
{
MultiplyApplicator op;
r = ApplyBinOP(op, v1, v2);
if (DebugOp())
std::cerr << v1.toString() << " * " << v2.toString() << " = " << r.toString() << std::endl;
return r;
}
case SYMOP_MIN:
r = Min(v1,v2);
if (DebugOp())
std::cerr << "Min( " << v1.toString() << " , " << v2.toString() << ") = " << r.toString() << std::endl;
return r;
case SYMOP_MAX: return Max(v1, v2);
r = Max(v1,v2);
if (DebugOp())
std::cerr << "Max( " << v1.toString() << " , " << v2.toString() << ") = " << r.toString() << std::endl;
return r;
case SYMOP_POW:
{
int val2;
int vu1, vd1;
if (!v2.isConstInt(val2))
assert(false);
if (v1 == 1 || val2 == 1)
r = v1;
else if (val2 == -1 && v1.isConstInt(vu1, vd1))
r = new SymbolicConst(vd1, vu1);
else
r = new SymbolicPow(v1, val2);
if (DebugOp())
std::cerr << "Pow( " << v1.toString() << " , " << v2.toString() << ") = " << r.toString() << std::endl;
return r;
}
default:
assert(false);
}
}
bool ArrayInterface ::
GetArrayBound( AstInterface& _fa, const AstNodePtr& array,
int dim, int &lb, int &ub)
{
CPPAstInterface& fa = static_cast<CPPAstInterface&>(_fa);
SymbolicFunctionDeclarationGroup len;
if (!is_array_exp( fa, array, 0, &len))
assert(false);
std::vector<SymbolicVal> pars;
pars.push_back( SymbolicConst(dim));
SymbolicVal rval;
if (!len.get_val( pars, rval))
return false;
if (!rval.isConstInt(ub))
return false;
lb = 0;
return true;
}
bool AnalyzeEquation(const CoeffVec& vec, const BoundVec& bounds,
BoundOp& boundop,
Dep& result, const DepRel& rel)
{
int dim = vec.size()- 1;
std::vector<int> signs;
for (int index = 0; index < dim; ++index) {
if (vec[index]==0) {
signs.push_back(0);
continue;
}
SymbolicBound cb = GetValBound(vec[index], boundop);
assert(!cb.lb.IsNIL() && !cb.ub.IsNIL());
const SymbolicBound& b = bounds[index];
assert(!b.lb.IsNIL() && !b.ub.IsNIL());
if (b.lb >= 0) {
if (cb.lb >= 0)
signs.push_back(1);
else if (cb.ub <= 0)
signs.push_back(-1);
else {
if (DebugDep())
std::cerr << "unable to decide sign of coeff when lb >=0 for ivar[" << index << "]\n";
//return false;
signs.push_back(2);
}
}
else if (b.ub <= 0) {
if (cb.lb >= 0)
signs.push_back(-1);
else if (cb.ub <= 0)
signs.push_back(1);
else {
if (DebugDep())
std::cerr << "unable to decide sign of coeff when ub <=0 for ivar[" << index << "]\n";
//return false;
signs.push_back(2);
}
}
else {
if (DebugDep())
std::cerr << "unable to decide sign of ivar[" << index << "]\n";
//return false;
signs.push_back(2);
}
}
if (vec[dim] == 0)
signs.push_back(0);
else {
SymbolicVal leftval = vec[dim];
if (leftval.IsNIL()) {
if (DebugDep())
std::cerr << "unable to decide sign of leftval\n";
return false;
}
SymbolicBound lb = GetValBound(vec[dim], boundop);
if (lb.ub <= 0)
signs.push_back(-1);
else if (lb.lb >= 0)
signs.push_back(1);
else {
if (DebugDep())
std::cerr << "unable to decide sign of leftval\n";
return false;
//signs.push_back(2);
}
}
for (int i = 0; i < dim ; ++i) {
if (signs[i] == 0)
continue;
SymbolicVal coeff = vec[i];
assert(!coeff.IsNIL());
int j = 0;
for ( j = i+1; j < dim; ++j) {
if (signs[j] == 0 || coeff + vec[j] != 0)
continue;
int left = 0, k;
for (k = 0; k < dim ; ++k) {
if (k == i || k == j)
continue;
if (left == 0)
left = signs[k];
else if (signs[k] == 2 || signs[k] * left < 0)
break;
}
if ( k < dim || left == 2 || left * signs[dim] < 0)
continue;
int diff = 0, c = 1;
bool hasdiff = false;
if (left == 0 && vec[dim].isConstInt(diff) &&
(diff == 0 || coeff.isConstInt(c))) {
if (diff != 0 && c != 1) {
int odiff = diff;
diff = diff / c;
if (odiff != diff * c)
{
//DepStats.AddAdhocDV(DepStats.RoseToPlatoDV(DepRel(DEPDIR_NONE)));
result[i][j] = DepRel(DEPDIR_NONE);
return true;
}
}
hasdiff = true;
}
if (hasdiff) {
//DepStats.AddAdhocDV(DepStats.RoseToPlatoDV(DepRel(DEPDIR_EQ, diff)));
result[i][j] = rel * DepRel(DEPDIR_EQ, diff);
return true; // precise dependence
}
else if (signs[i] != 2) {
if (signs[dim]* signs[i] > 0) {
//DepStats.AddAdhocDV(DepStats.RoseToPlatoDV(DepRel(DEPDIR_GE, diff)));
result[i][j] = rel * DepRel(DEPDIR_GE, diff);
}
else {
//DepStats.AddAdhocDV(DepStats.RoseToPlatoDV(DepRel(DEPDIR_LE, diff)));
result[i][j] = rel * DepRel(DEPDIR_LE, diff);
}
}
}
}
return false;
}
bool LoopUnrolling::operator() ( AstInterface& fa, const AstNodePtr& s, AstNodePtr& r)
{
bool isLoop = false;
if (enclosingloop == s || (enclosingloop == AST_NULL && (isLoop = fa.IsLoop(s)))) {
for (enclosingloop = fa.GetParent(s);
enclosingloop != AST_NULL && !fa.IsLoop(enclosingloop);
enclosingloop = fa.GetParent(enclosingloop));
if (!isLoop)
return false;
}
AstNodePtr body;
SymbolicVal stepval, ubval, lbval;
SymbolicVar ivar;
if (!SymbolicValGenerator::IsFortranLoop(fa, s, &ivar, &lbval, &ubval, &stepval, &body))
return false;
if (opt & POET_TUNING) {
AutoTuningInterface* tune = LoopTransformInterface::getAutoTuningInterface();
if (tune == 0) {
std::cerr << "ERROR: AutoTuning Interface not defined!\n";
assert(0);
}
tune->UnrollLoop(fa,s, unrollsize);
}
else {
AstNodePtr r = s;
SymbolicVal nstepval = stepval * unrollsize;
SymbolicVal nubval = ubval;
bool hasleft = true, negativeStep = (stepval < 0);
std::vector<AstNodePtr> bodylist;
AstNodePtr leftbody, lefthead;
int stepnum=0, loopnum = 0;
SymbolicVal loopval = ubval - lbval + 1;
if (stepval.isConstInt(stepnum) && loopval.isConstInt(loopnum)
&& !(loopnum % stepnum)) {
hasleft = false;
}
else {
nubval = ubval - SymbolicVal(unrollsize - 1);
if (opt & COND_LEFTOVER) {
leftbody = fa.CreateBlock();
lefthead = leftbody;
}
else {
leftbody = fa.CopyAstTree(body);
lefthead = fa.CreateLoop( ivar.CodeGen(fa),
AstNodePtr(),
ubval.CodeGen(fa),
stepval.CodeGen(fa), leftbody,
negativeStep);
}
}
fa.RemoveStmt(body);
AstNodePtr s1 = fa.CreateLoop(ivar.CodeGen(fa), lbval.CodeGen(fa),
nubval.CodeGen(fa),
nstepval.CodeGen(fa), body,
negativeStep);
fa.ReplaceAst( s,s1);
r = s1;
AstNodePtr origbody = fa.CopyAstTree(body);
std::string nvarname = "";
SymbolicVal nvar;
if (opt & USE_NEWVAR) {
nvarname = fa.NewVar(fa.GetType("int"),"",true,body, ivar.CodeGen(fa));
nvar = SymbolicVar(nvarname,body);
}
bodylist.push_back(body);
for (int i = 1; i < unrollsize; ++i) {
AstNodePtr bodycopy = fa.CopyAstTree(origbody);
if (opt & USE_NEWVAR) {
AstNodePtr nvarassign =
fa.CreateAssignment(nvar.CodeGen(fa), (nvar+1).CodeGen(fa));
fa.BlockAppendStmt( body, nvarassign);
AstTreeReplaceVar repl(ivar, nvar);
repl( fa, bodycopy);
}
else {
AstTreeReplaceVar repl(ivar, ivar+i);
repl( fa, bodycopy);
}
fa.BlockAppendStmt( body, bodycopy);
bodylist.push_back(bodycopy);
if (hasleft && (opt & COND_LEFTOVER)) {
AstNodePtr cond =
fa.CreateBinaryOP( AstInterface::BOP_LE, ivar.CodeGen(fa), (ubval-(i-1)).CodeGen(fa));
AstNodePtr body1 = fa.CopyAstTree(bodylist[i-1]);
AstNodePtr ifstmt = fa.CreateIf( cond, body1);
fa.BlockAppendStmt( leftbody, ifstmt);
leftbody = body1;
}
}
if (hasleft) {
fa.InsertStmt( r, lefthead, false, true);
}
r = s;
return true;
}
return false;
}
