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Internals: Move variable referencing into LinkDot in support of structs.

This commit is contained in:
Wilson Snyder 2012-07-24 06:26:35 -04:00
parent e655c85489
commit b52d94273c
8 changed files with 373 additions and 186 deletions
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11
src/V3Ast.h
View File

@ -500,10 +500,11 @@ class AstParseRefExp {
public: public:
enum en { enum en {
PX_NONE, // Used in V3LinkParse only PX_NONE, // Used in V3LinkParse only
PX_VAR_MEM, PX_TEXT, // Unknown ID component
PX_VAR_ANY, PX_PREDOT, // Module name or misc component above var/task/func/member
PX_TASK, PX_VAR_MEM, // Variable that must be a memory
PX_FUNC PX_VAR_ANY, // Variable/structure member
PX_FTASK // Task/Function (AstParse::ftaskrefp() will be set)
}; };
enum en m_e; enum en m_e;
inline AstParseRefExp() : m_e(PX_NONE) {} inline AstParseRefExp() : m_e(PX_NONE) {}
@ -512,7 +513,7 @@ public:
operator en () const { return m_e; } operator en () const { return m_e; }
const char* ascii() const { const char* ascii() const {
static const char* names[] = { static const char* names[] = {
"","VAR_MEM","VAR_ANY","TASK","FUNC"}; "","TEXT","PREDOT","VAR_MEM","VAR_ANY","FTASK"};
return names[m_e]; } return names[m_e]; }
}; };
inline bool operator== (AstParseRefExp lhs, AstParseRefExp rhs) { return (lhs.m_e == rhs.m_e); } inline bool operator== (AstParseRefExp lhs, AstParseRefExp rhs) { return (lhs.m_e == rhs.m_e); }

5
src/V3AstNodes.cpp
View File

@ -806,6 +806,11 @@ void AstSenItem::dump(ostream& str) {
void AstParseRef::dump(ostream& str) { void AstParseRef::dump(ostream& str) {
this->AstNode::dump(str); this->AstNode::dump(str);
str<<" ["<<expect().ascii()<<"]"; str<<" ["<<expect().ascii()<<"]";
if (start()) str<<" [START]";
}
void AstDot::dump(ostream& str) {
this->AstNode::dump(str);
if (start()) str<<" [START]";
} }
void AstActive::dump(ostream& str) { void AstActive::dump(ostream& str) {
this->AstNode::dump(str); this->AstNode::dump(str);

29
src/V3AstNodes.h
View File

@ -1263,33 +1263,48 @@ struct AstParseRef : public AstNode {
// We don't know which at parse time due to bison constraints // We don't know which at parse time due to bison constraints
// The link stages will replace this with AstVarRef, or AstTaskRef, etc. // The link stages will replace this with AstVarRef, or AstTaskRef, etc.
// Parents: math|stmt // Parents: math|stmt
// Children: TEXT|DOT|SEL* (or expression under sel) // Children: TEXT|DOT|SEL*|TASK|FUNC (or expression under sel)
private: private:
AstParseRefExp m_expect; // Type we think it should resolve to AstParseRefExp m_expect; // Type we think it should resolve to
string m_name;
bool m_start; // Start of parseref stack
public: public:
AstParseRef(FileLine* fl, AstParseRefExp expect, AstNode* lhsp) AstParseRef(FileLine* fl, AstParseRefExp expect, const string& name, AstNode* lhsp, AstNodeFTaskRef* ftaskrefp)
:AstNode(fl), m_expect(expect) { setOp1p(lhsp); } :AstNode(fl), m_expect(expect), m_name(name) { setNOp1p(lhsp); setNOp2p(ftaskrefp); m_start=false; }
ASTNODE_NODE_FUNCS(ParseRef, PARSEREF) ASTNODE_NODE_FUNCS(ParseRef, PARSEREF)
virtual void dump(ostream& str); virtual void dump(ostream& str);
virtual V3Hash sameHash() const { return V3Hash(m_expect); } virtual string name() const { return m_name; } // * = Var name
virtual bool same(AstNode* samep) const { return expect() == samep->castParseRef()->expect(); } virtual V3Hash sameHash() const { return V3Hash(V3Hash(m_expect),V3Hash(m_name)); }
virtual bool same(AstNode* samep) const { return expect() == samep->castParseRef()->expect() && m_name==samep->castParseRef()->m_name; }
virtual string emitVerilog() { V3ERROR_NA; return ""; } virtual string emitVerilog() { V3ERROR_NA; return ""; }
virtual string emitC() { V3ERROR_NA; return ""; } virtual string emitC() { V3ERROR_NA; return ""; }
virtual void name(const string& name) { m_name = name; }
AstParseRefExp expect() const { return m_expect; } AstParseRefExp expect() const { return m_expect; }
void expect(AstParseRefExp exp) { m_expect=exp; }
// op1 = Components // op1 = Components
AstNode* lhsp() const { return op1p(); } // op1 = List of statements AstNode* lhsp() const { return op1p(); } // op1 = List of statements
AstNode* ftaskrefp() const { return op2p(); } // op2 = Function/task reference
void ftaskrefp(AstNodeFTaskRef* nodep) { setNOp2p(nodep); } // op2 = Function/task reference
bool start() const { return m_start; }
void start(bool flag) { m_start = flag; }
}; };
struct AstDot : public AstNode { struct AstDot : public AstNode {
// A dot separating paths in an AstXRef, AstFuncRef or AstTaskRef // A dot separating paths in an AstXRef, AstFuncRef or AstTaskRef
// These are elimiated in the link stage // These are eliminated in the link stage
private:
bool m_start; // Start of parseref stack
public:
AstDot(FileLine* fl, AstNode* lhsp, AstNode* rhsp) AstDot(FileLine* fl, AstNode* lhsp, AstNode* rhsp)
:AstNode(fl) { setOp1p(lhsp); setOp2p(rhsp); } :AstNode(fl) { setOp1p(lhsp); setOp2p(rhsp); m_start=false; }
ASTNODE_NODE_FUNCS(Dot, DOT) ASTNODE_NODE_FUNCS(Dot, DOT)
virtual void dump(ostream& str);
virtual string emitVerilog() { V3ERROR_NA; return ""; } virtual string emitVerilog() { V3ERROR_NA; return ""; }
virtual string emitC() { V3ERROR_NA; return ""; } virtual string emitC() { V3ERROR_NA; return ""; }
AstNode* lhsp() const { return op1p(); } AstNode* lhsp() const { return op1p(); }
AstNode* rhsp() const { return op2p(); } AstNode* rhsp() const { return op2p(); }
bool start() const { return m_start; }
void start(bool flag) { m_start = flag; }
}; };
//###################################################################### //######################################################################

303
src/V3LinkDot.cpp
View File

@ -773,9 +773,9 @@ class LinkDotParamVisitor : public AstNVisitor {
private: private:
// NODE STATE // NODE STATE
// Cleared on global // Cleared on global
// *:user1p() -> See LinkDotState // *::user1p() -> See LinkDotState
// *:user2p() -> See LinkDotState // *::user2p() -> See LinkDotState
// *:user4() -> See LinkDotState // *::user4() -> See LinkDotState
// STATE // STATE
LinkDotState* m_statep; // State to pass between visitors, including symbol table LinkDotState* m_statep; // State to pass between visitors, including symbol table
@ -786,7 +786,10 @@ private:
void pinImplicitExprRecurse(AstNode* nodep) { void pinImplicitExprRecurse(AstNode* nodep) {
// Under a pin, Check interconnect expression for a pin reference or a concat. // Under a pin, Check interconnect expression for a pin reference or a concat.
// Create implicit variable as needed // Create implicit variable as needed
if (nodep->castVarRef()) { if (nodep->castDot()) { // Not creating a simple implied type,
// and implying something else would just confuse later errors
}
if (nodep->castVarRef() || (nodep->castParseRef() && nodep->castParseRef()->start())) {
// To prevent user errors, we should only do single bit // To prevent user errors, we should only do single bit
// implicit vars, however some netlists (MIPS) expect single // implicit vars, however some netlists (MIPS) expect single
// bit implicit wires to get created with range 0:0 etc. // bit implicit wires to get created with range 0:0 etc.
@ -982,47 +985,37 @@ class LinkDotResolveVisitor : public AstNVisitor {
private: private:
// NODE STATE // NODE STATE
// Cleared on global // Cleared on global
// *:user1p() -> See LinkDotState // *::user1p() -> See LinkDotState
// *:user2p() -> See LinkDotState // *::user2p() -> See LinkDotState
// *:user4() -> See LinkDotState // *::user3() // bool. Processed
// *::user4() -> See LinkDotState
// Cleared on Cell // Cleared on Cell
// AstVar::user5() // bool True if pin used in this cell // AstVar::user5() // bool. True if pin used in this cell
AstUser3InUse m_inuser3;
AstUser5InUse m_inuser5; AstUser5InUse m_inuser5;
// TYPES
enum DotPosition { DP_SCOPE, DP_VARETC, DP_MEMBER };
// STATE // STATE
LinkDotState* m_statep; // State, including dotted symbol table LinkDotState* m_statep; // State, including dotted symbol table
VSymEnt* m_curSymp; // SymEnt for current lookup point VSymEnt* m_curSymp; // SymEnt for current lookup point
VSymEnt* m_modSymp; // SymEnt for current module VSymEnt* m_modSymp; // SymEnt for current module
VSymEnt* m_dotSymp; // SymEnt for dotted AstParse lookup
VSymEnt* m_pinSymp; // SymEnt for pin lookups VSymEnt* m_pinSymp; // SymEnt for pin lookups
AstCell* m_cellp; // Current cell AstCell* m_cellp; // Current cell
AstNodeModule* m_modp; // Current module AstNodeModule* m_modp; // Current module
AstNodeFTask* m_ftaskp; // Current function/task AstNodeFTask* m_ftaskp; // Current function/task
AstDot* m_dotp; // Current dot
DotPosition m_dotPos; // Scope part of dotted resolution
bool m_dotErr; // Error found in dotted resolution, ignore upwards
string m_dotText; // String of dotted names found in below parseref
int debug() { return LinkDotState::debug(); } int debug() { return LinkDotState::debug(); }
// METHODS - Variables // METHODS - Variables
bool linkVarName (VSymEnt* lookupSymp, AstVarRef* nodep) {
// Return true if changed, and caller should end processing
if (!nodep->varp()) {
UINFO(9," linkVarName se"<<(void*)lookupSymp<<" n="<<nodep<<endl);
if (!lookupSymp) nodep->v3fatalSrc("NULL lookup symbol table");
VSymEnt* foundp = lookupSymp->findIdFallback(nodep->name());
if (AstVar* varp = foundp->nodep()->castVar()) {
nodep->varp(varp);
nodep->packagep(foundp->packagep());
}
else if (AstEnumItem* valuep = foundp->nodep()->castEnumItem()) {
AstNode* newp = new AstEnumItemRef(nodep->fileline(), valuep, foundp->packagep());
nodep->replaceWith(newp);
nodep->deleteTree(); nodep=NULL;
return true; // Edited
}
}
return false;
}
void createImplicitVar (VSymEnt* lookupSymp, AstVarRef* nodep, AstNodeModule* modp, VSymEnt* moduleSymp, bool noWarn) { void createImplicitVar (VSymEnt* lookupSymp, AstVarRef* nodep, AstNodeModule* modp, VSymEnt* moduleSymp, bool noWarn) {
// Create implicit after warning // Create implicit after warning
if (linkVarName(lookupSymp, nodep)) { nodep=NULL; return; }
if (!nodep->varp()) { if (!nodep->varp()) {
if (!noWarn) { if (!noWarn) {
if (nodep->fileline()->warnIsOff(V3ErrorCode::I_DEF_NETTYPE_WIRE)) { if (nodep->fileline()->warnIsOff(V3ErrorCode::I_DEF_NETTYPE_WIRE)) {
@ -1054,18 +1047,18 @@ private:
virtual void visit(AstNodeModule* nodep, AstNUser*) { virtual void visit(AstNodeModule* nodep, AstNUser*) {
if (nodep->dead()) return; if (nodep->dead()) return;
UINFO(8," "<<nodep<<endl); UINFO(8," "<<nodep<<endl);
m_curSymp = m_modSymp = m_statep->getNodeSym(nodep); // Until overridden by a SCOPE m_dotSymp = m_curSymp = m_modSymp = m_statep->getNodeSym(nodep); // Until overridden by a SCOPE
m_cellp = NULL; m_cellp = NULL;
m_modp = nodep; m_modp = nodep;
nodep->iterateChildren(*this); nodep->iterateChildren(*this);
m_modp = NULL; m_modp = NULL;
m_curSymp = m_modSymp = NULL; m_dotSymp = m_curSymp = m_modSymp = NULL;
} }
virtual void visit(AstScope* nodep, AstNUser*) { virtual void visit(AstScope* nodep, AstNUser*) {
UINFO(8," "<<nodep<<endl); UINFO(8," "<<nodep<<endl);
m_curSymp = m_statep->getScopeSym(nodep); m_dotSymp = m_curSymp = m_statep->getScopeSym(nodep);
nodep->iterateChildren(*this); nodep->iterateChildren(*this);
m_curSymp = NULL; m_dotSymp = m_curSymp = NULL;
} }
virtual void visit(AstCellInline* nodep, AstNUser*) { virtual void visit(AstCellInline* nodep, AstNUser*) {
if (m_statep->forScopeCreation()) { if (m_statep->forScopeCreation()) {
@ -1129,20 +1122,214 @@ private:
} }
// Early return() above when deleted // Early return() above when deleted
} }
virtual void visit(AstVarRef* nodep, AstNUser*) { virtual void visit(AstDot* nodep, AstNUser*) {
// VarRef: Resolve its reference if (nodep->user3SetOnce()) return;
nodep->iterateChildren(*this); UINFO(8," "<<nodep<<endl);
if (!nodep->varp()) { AstDot* lastDotp = m_dotp;
if (linkVarName(m_curSymp, nodep)) { nodep=NULL; return; } string lastText = m_dotText;
if (!nodep->varp()) { bool lastErr = m_dotErr;
bool err = (m_statep->forPrimary() DotPosition lastDotPos = m_dotPos;
&& !m_statep->implicitOk(m_modp, nodep->name())); VSymEnt* lastDotSymp = m_dotSymp;
bool start = nodep->start(); // Save, as nodep may go NULL
{
m_dotp = nodep; // Always, not just at start
if (start) { // Starting dot sequence
if (debug()>=9) nodep->dumpTree("-dot-in: ");
m_dotText = "";
m_dotErr = false;
m_dotSymp = m_curSymp; // Start from current point
}
// m_dotText communicates the cell prefix between stages
m_dotPos = DP_SCOPE;
nodep->lhsp()->iterateAndNext(*this);
if (!m_dotErr) { // Once something wrong, give up
if (start && m_dotPos==DP_SCOPE) m_dotPos = DP_VARETC; // Top dot RHS is final RHS, else it's a DOT(DOT(x,*here*),real-rhs) which we consider a RHS
nodep->rhsp()->iterateAndNext(*this);
}
if (start) {
AstNode* newp;
if (m_dotErr) {
newp = new AstConst(nodep->fileline(),AstConst::LogicFalse());
} else {
// RHS is what we're left with
newp = nodep->rhsp()->unlinkFrBack();
}
if (debug()>=9) newp->dumpTree("-dot-out: ");
nodep->replaceWith(newp);
pushDeletep(nodep); nodep=NULL;
} else { // Dot midpoint
AstNode* newp = nodep->rhsp()->unlinkFrBack();
nodep->replaceWith(newp);
pushDeletep(nodep); nodep=NULL;
}
}
m_dotp = lastDotp;
if (start) {
m_dotText = lastText;
m_dotErr = lastErr;
m_dotPos = lastDotPos;
m_dotSymp = lastDotSymp;
}
}
virtual void visit(AstParseRef* nodep, AstNUser*) {
if (nodep->user3SetOnce()) return;
UINFO(9," linkPARSEREF se"<<(void*)m_dotSymp<<" pos="<<m_dotPos<<" txt="<<m_dotText<<" n="<<nodep<<endl);
// m_curSymp is symbol table of outer expression
// m_dotSymp is symbol table relative to "."'s above now
if (!m_dotSymp) nodep->v3fatalSrc("NULL lookup symbol table");
if (!m_statep->forPrimary()) nodep->v3fatalSrc("ParseRefs should no longer exist");
AstDot* lastDotp = m_dotp;
string lastText = m_dotText;
bool lastErr = m_dotErr;
DotPosition lastDotPos = m_dotPos;
VSymEnt* lastDotSymp = m_dotSymp;
bool start = nodep->start(); // Save, as nodep may go NULL
if (nodep->start()) {
m_dotp = NULL;
m_dotText = "";
m_dotErr = false;
m_dotPos = DP_VARETC;
m_dotSymp = m_curSymp;
}
if (m_dotPos == DP_MEMBER) {
nodep->v3error("Unsupported: Structs and dotted reference into variable");
}
else {
//
string expectWhat;
bool allowScope = false;
bool allowVar = false;
bool onlyVar = false;
if (nodep->expect() == AstParseRefExp::PX_PREDOT) {
// {a}.{b}, where {a} maybe a module name
// FUTURE: or variable, where dotting into structure member
expectWhat = "scope/variable";
allowScope = true;
allowVar = true;
} else if (nodep->expect() == AstParseRefExp::PX_VAR_MEM
|| nodep->expect() == AstParseRefExp::PX_VAR_ANY) {
expectWhat = "variable";
onlyVar = true;
allowVar = true;
} else if (nodep->expect() == AstParseRefExp::PX_FTASK) {
expectWhat = "task/function";
} else {
nodep->v3fatalSrc("Unhandled AstParseRefExp");
}
// Lookup
VSymEnt* foundp;
string baddot;
VSymEnt* okSymp = NULL;
if (allowScope) {
foundp = m_statep->findDotted(m_dotSymp, nodep->name(), baddot, okSymp); // Maybe NULL
} else {
foundp = m_dotSymp->findIdFallback(nodep->name());
}
if (foundp) UINFO(9," found=se"<<(void*)foundp<<" n="<<foundp->nodep()<<endl);
// What fell out?
bool ok = false;
if (foundp->nodep()->castCell() || foundp->nodep()->castBegin()
|| foundp->nodep()->castModule()) { // if top
if (allowScope) {
ok = true;
if (m_dotText!="") m_dotText += ".";
m_dotText += nodep->name();
m_dotSymp = foundp;
// Upper AstDot visitor will handle it from here
}
}
else if (AstVar* varp = foundp->nodep()->castVar()) {
if (allowVar) {
AstNodeVarRef* newp;
if (m_dotText != "") {
newp = new AstVarXRef(nodep->fileline(), nodep->name(), m_dotText, false); // lvalue'ness computed later
newp->varp(varp);
m_dotText = "";
} else {
newp = new AstVarRef(nodep->fileline(), nodep->name(), false); // lvalue'ness computed later
newp->varp(varp);
newp->packagep(foundp->packagep());
}
nodep->replaceWith(newp); pushDeletep(nodep); nodep = NULL;
m_dotPos = DP_MEMBER;
ok = true;
}
}
else if (AstEnumItem* valuep = foundp->nodep()->castEnumItem()) {
if (allowVar) {
AstNode* newp = new AstEnumItemRef(nodep->fileline(), valuep, foundp->packagep());
nodep->replaceWith(newp); pushDeletep(nodep); nodep = NULL;
ok = true;
m_dotText = "";
}
}
else if (AstNodeFTask* ftaskp = foundp->nodep()->castNodeFTask()) {
if (nodep->expect() == AstParseRefExp::PX_FTASK) {
AstNodeFTaskRef* refp = nodep->ftaskrefp()->castNodeFTaskRef();
if (!refp) nodep->v3fatalSrc("Parseref indicates FTASKref but none found");
refp->name(nodep->name());
refp->dotted(m_dotText); // Maybe ""
refp->taskp(ftaskp);
refp->packagep(foundp->packagep()); // Generally set by parse, but might be an import
taskFuncSwapCheck(refp);
refp->unlinkFrBack();
nodep->replaceWith(refp); pushDeletep(nodep); nodep = NULL;
ok = true;
}
}
//
if (!ok) {
bool checkImplicit = (onlyVar && m_dotText=="");
bool err = !(checkImplicit && m_statep->implicitOk(m_modp, nodep->name()));
if (err) { if (err) {
m_statep->preErrorDump(); m_statep->preErrorDump();
nodep->v3error("Can't find definition of signal: "<<nodep->prettyName()); if (foundp) {
nodep->v3error("Found definition of '"<<m_dotText<<(m_dotText==""?"":".")<<nodep->prettyName()
<<"'"<<" as a "<<foundp->nodep()->typeName()
<<" but expected a "<<expectWhat);
} else if (m_dotText=="") {
nodep->v3error("Can't find definition of "<<expectWhat
<<": "<<nodep->prettyName());
} else {
nodep->v3error("Can't find definition of '"<<(baddot!=""?baddot:nodep->prettyName())<<"' in dotted "
<<expectWhat<<": "<<m_dotText+"."+nodep->prettyName());
okSymp->cellErrorScopes(nodep, AstNode::prettyName(m_dotText));
}
m_dotErr = true;
} }
// Create even if error, so only complain once if (checkImplicit) { // Else if a scope is allowed, making a signal won't help error cascade
createImplicitVar (m_curSymp, nodep, m_modp, m_modSymp, err); // Create if implicit, and also if error (so only complain once)
AstVarRef* newp = new AstVarRef(nodep->fileline(), nodep->name(), false);
nodep->replaceWith(newp);
pushDeletep(nodep); nodep = NULL;
createImplicitVar (m_curSymp, newp, m_modp, m_modSymp, err);
}
}
}
if (start) {
m_dotp = lastDotp;
m_dotText = lastText;
m_dotErr = lastErr;
m_dotPos = lastDotPos;
m_dotSymp = lastDotSymp;
}
}
virtual void visit(AstVarRef* nodep, AstNUser*) {
// VarRef: Resolve its reference
// ParseRefs are used the first pass (forPrimary) so we shouldn't get can't find
// errors here now that we have a VarRef.
nodep->iterateChildren(*this);
if (!nodep->varp()) {
UINFO(9," linkVarRef se"<<(void*)m_curSymp<<" n="<<nodep<<endl);
if (!m_curSymp) nodep->v3fatalSrc("NULL lookup symbol table");
VSymEnt* foundp = m_curSymp->findIdFallback(nodep->name());
if (AstVar* varp = foundp->nodep()->castVar()) {
nodep->varp(varp);
nodep->packagep(foundp->packagep()); // Generally set by parse, but might be an import
}
if (!nodep->varp()) {
m_statep->preErrorDump();
nodep->v3error("Can't find definition of signal, again: "<<nodep->prettyName());
} }
} }
} }
@ -1150,6 +1337,7 @@ private:
// VarRef: Resolve its reference // VarRef: Resolve its reference
// We always link even if varp() is set, because the module we choose may change // We always link even if varp() is set, because the module we choose may change
// due to creating new modules, flattening, etc. // due to creating new modules, flattening, etc.
if (nodep->user3SetOnce()) return;
UINFO(8," "<<nodep<<endl); UINFO(8," "<<nodep<<endl);
if (!m_modSymp) { if (!m_modSymp) {
UINFO(9,"Dead module for "<<nodep<<endl); UINFO(9,"Dead module for "<<nodep<<endl);
@ -1208,6 +1396,7 @@ private:
} }
} }
virtual void visit(AstNodeFTaskRef* nodep, AstNUser*) { virtual void visit(AstNodeFTaskRef* nodep, AstNUser*) {
if (nodep->user3SetOnce()) return;
UINFO(8," "<<nodep<<endl); UINFO(8," "<<nodep<<endl);
if (nodep->packagep() && nodep->taskp()) { if (nodep->packagep() && nodep->taskp()) {
// References into packages don't care about cell hierarchy. // References into packages don't care about cell hierarchy.
@ -1259,15 +1448,30 @@ private:
} }
nodep->iterateChildren(*this); nodep->iterateChildren(*this);
} }
virtual void visit(AstSelBit* nodep, AstNUser*) {
if (nodep->user3SetOnce()) return;
if (m_dotPos == DP_SCOPE) { // Already under dot, so this is {modulepart} DOT {modulepart}
nodep->lhsp()->iterateAndNext(*this);
if (AstConst* constp = nodep->rhsp()->castConst()) {
string index = AstNode::encodeNumber(constp->toSInt());
m_dotText += "__BRA__"+index+"__KET__";
} else {
nodep->v3error("Unsupported: Non-constant inside []'s in the cell part of a dotted reference");
}
// And pass up m_dotText
} else {
nodep->iterateChildren(*this);
}
}
virtual void visit(AstBegin* nodep, AstNUser*) { virtual void visit(AstBegin* nodep, AstNUser*) {
UINFO(5," "<<nodep<<endl); UINFO(5," "<<nodep<<endl);
VSymEnt* oldCurSymp = m_curSymp; VSymEnt* oldCurSymp = m_curSymp;
{ {
m_curSymp = m_statep->getNodeSym(nodep); m_dotSymp = m_curSymp = m_statep->getNodeSym(nodep);
UINFO(5," cur=se"<<(void*)m_curSymp<<endl); UINFO(5," cur=se"<<(void*)m_curSymp<<endl);
nodep->iterateChildren(*this); nodep->iterateChildren(*this);
} }
m_curSymp = oldCurSymp; m_dotSymp = m_curSymp = oldCurSymp;
UINFO(5," cur=se"<<(void*)m_curSymp<<endl); UINFO(5," cur=se"<<(void*)m_curSymp<<endl);
} }
virtual void visit(AstNodeFTask* nodep, AstNUser*) { virtual void visit(AstNodeFTask* nodep, AstNUser*) {
@ -1275,14 +1479,15 @@ private:
VSymEnt* oldCurSymp = m_curSymp; VSymEnt* oldCurSymp = m_curSymp;
{ {
m_ftaskp = nodep; m_ftaskp = nodep;
m_curSymp = m_statep->getNodeSym(nodep); m_dotSymp = m_curSymp = m_statep->getNodeSym(nodep);
nodep->iterateChildren(*this); nodep->iterateChildren(*this);
} }
m_curSymp = oldCurSymp; m_dotSymp = m_curSymp = oldCurSymp;
m_ftaskp = NULL; m_ftaskp = NULL;
} }
virtual void visit(AstRefDType* nodep, AstNUser*) { virtual void visit(AstRefDType* nodep, AstNUser*) {
// Resolve its reference // Resolve its reference
if (nodep->user3SetOnce()) return;
if (!nodep->defp()) { if (!nodep->defp()) {
VSymEnt* foundp; VSymEnt* foundp;
if (nodep->packagep()) { if (nodep->packagep()) {
@ -1324,10 +1529,14 @@ public:
m_statep = statep; m_statep = statep;
m_modSymp = NULL; m_modSymp = NULL;
m_curSymp = NULL; m_curSymp = NULL;
m_dotSymp = NULL;
m_pinSymp = NULL; m_pinSymp = NULL;
m_cellp = NULL; m_cellp = NULL;
m_modp = NULL; m_modp = NULL;
m_ftaskp = NULL; m_ftaskp = NULL;
m_dotp = NULL;
m_dotPos = DP_VARETC;
m_dotErr = false;
// //
rootp->accept(*this); rootp->accept(*this);
} }

180
src/V3LinkParse.cpp
View File

@ -19,11 +19,11 @@
//************************************************************************* //*************************************************************************
// LinkParse TRANSFORMATIONS: // LinkParse TRANSFORMATIONS:
// Top-down traversal // Top-down traversal
// Replace ParseRef with VarRef, VarXRef, FuncRef or TaskRef // Replace ParseRef with lower parseref
// TASKREF(PARSEREF(DOT(TEXTa,TEXTb))) -> TASKREF(a,b) // TASKREF(PARSEREF(DOT(TEXTa,TEXTb))) -> DOT(PARSEREF(a),TASKREF(b))
// PARSEREF(TEXTa) -> VARREF(a) // PARSEREF(TEXTa) -> PARSEREF(a) (no change)
// PARSEREF(DOT(TEXTa,TEXTb)) -> VARXREF("a","b") // PARSEREF(DOT(TEXTa,TEXTb)) -> DOT(PARSEREF(A),PARSEREF(b)
// PARSEREF(DOT(DOT(TEXTa,TEXTb),TEXTc)) -> VARXREF("a.b","c") // PARSEREF(DOT(DOT(TEXTa,TEXTb),TEXTc)) -> DOT(DOT(PARSEREF(a),PARSEREF(b)),PARSEREF(c))
//************************************************************************* //*************************************************************************
#include "config_build.h" #include "config_build.h"
@ -57,17 +57,16 @@ private:
typedef set <FileLine*> FileLineSet; typedef set <FileLine*> FileLineSet;
// STATE // STATE
string m_dotText; // Dotted module text we are building for a dotted node, passed up AstParseRefExp m_exp; // Type of data we're looking for
bool m_inModDot; // We're inside module part of dotted name AstVar* m_varp; // Variable we're under
AstParseRefExp m_exp; // Type of data we're looking for
AstText* m_baseTextp; // Lowest TEXT node that needs replacement with varref
AstVar* m_varp; // Variable we're under
ImplTypedefMap m_implTypedef; // Created typedefs for each <container,name> ImplTypedefMap m_implTypedef; // Created typedefs for each <container,name>
FileLineSet m_filelines; // Filelines that have been seen FileLineSet m_filelines; // Filelines that have been seen
bool m_inAlways; // Inside an always bool m_inAlways; // Inside an always
bool m_inGenerate; // Inside a generate bool m_inGenerate; // Inside a generate
bool m_needStart; // Need start marker on lower AstParse
AstNodeModule* m_valueModp; // If set, move AstVar->valuep() initial values to this module AstNodeModule* m_valueModp; // If set, move AstVar->valuep() initial values to this module
AstNodeModule* m_modp; // Current module AstNodeModule* m_modp; // Current module
AstParseRef* m_rightParsep; // RHS()-most parseref
// METHODS // METHODS
static int debug() { static int debug() {
@ -104,17 +103,6 @@ private:
cleanFileline(nodep); cleanFileline(nodep);
UINFO(5," "<<nodep<<endl); UINFO(5," "<<nodep<<endl);
checkExpected(nodep); checkExpected(nodep);
// Due to a need to get the arguments, the ParseRefs are under here,
// rather than the NodeFTaskRef under the ParseRef.
if (nodep->namep()) {
m_exp = AstParseRefExp::PX_FUNC;
nodep->namep()->accept(*this); // No next, we don't want to do the edit
m_exp = AstParseRefExp::PX_NONE;
if (!m_baseTextp) nodep->v3fatalSrc("No TEXT found to indicate function name");
nodep->name(m_baseTextp->text());
nodep->dotted(m_dotText);
nodep->namep()->unlinkFrBack()->deleteTree(); m_baseTextp=NULL;
}
AstNodeModule* upperValueModp = m_valueModp; AstNodeModule* upperValueModp = m_valueModp;
m_valueModp = NULL; m_valueModp = NULL;
nodep->iterateChildren(*this); nodep->iterateChildren(*this);
@ -122,99 +110,81 @@ private:
} }
} }
virtual void visit(AstParseRef* nodep, AstNUser*) { virtual void visit(AstParseRef* nodep, AstNUser*) {
if (nodep->user1SetOnce()) return; // Process only once.
// VarRef: Parse its reference // VarRef: Parse its reference
UINFO(5," "<<nodep<<endl); UINFO(5," "<<nodep<<endl);
// May be a varref inside a select, etc, so save state and recurse { // First do any function call
string oldText = m_dotText; AstParseRefExp lastExp = m_exp;
bool oldDot = m_inModDot; {
AstParseRefExp oldExp = m_exp;
AstText* oldBasep = m_baseTextp;
{
// Replace the parsed item with its child IE the selection tree down to the varref itself
// Do this before iterating, so we don't have to process the edited tree twice
AstNode* lhsp = nodep->lhsp()->unlinkFrBack();
nodep->replaceWith(lhsp);
// Process lower nodes
m_dotText = "";
m_baseTextp = NULL;
if (m_exp == AstParseRefExp::PX_FUNC) {
lhsp->accept(*this);
// Return m_dotText to invoker
} else if (nodep->expect() == AstParseRefExp::PX_VAR_MEM
|| nodep->expect() == AstParseRefExp::PX_VAR_ANY) {
m_exp = nodep->expect();
lhsp->accept(*this);
m_exp = AstParseRefExp::PX_NONE; m_exp = AstParseRefExp::PX_NONE;
if (!m_baseTextp) nodep->v3fatalSrc("No TEXT found to indicate function name"); if (nodep->ftaskrefp()) nodep->ftaskrefp()->iterateAndNext(*this);
if (m_dotText == "") {
AstNode* newp = new AstVarRef(nodep->fileline(), m_baseTextp->text(), false); // lvalue'ness computed later
m_baseTextp->replaceWith(newp); m_baseTextp->deleteTree(); m_baseTextp=NULL;
} else {
AstNode* newp = new AstVarXRef(nodep->fileline(), m_baseTextp->text(), m_dotText, false); // lvalue'ness computed later
m_baseTextp->replaceWith(newp); m_baseTextp->deleteTree(); m_baseTextp=NULL;
}
} else {
nodep->v3fatalSrc("Unknown ParseRefExp type\n");
} }
nodep->deleteTree(); nodep=NULL; m_exp = lastExp;
} }
if (m_exp != AstParseRefExp::PX_FUNC) { // Fuctions need to look at the name themself if (nodep->start()) { // Start of new parseref stack
m_dotText = oldText; // The start parseref indicates the type of element to be created.
m_inModDot = oldDot; // Push the start marking down to the lowest non-start parseref under any DOTs.
m_exp = oldExp; // May be a varref inside a select, etc, so save state and recurse
m_baseTextp = oldBasep; AstParseRefExp lastExp = m_exp;
AstParseRef* lastRightp = m_rightParsep;
{
m_exp = nodep->expect();
m_rightParsep = NULL;
m_needStart = true;
nodep->lhsp()->accept(*this);
if (!m_rightParsep) nodep->v3fatalSrc("No child ParseRef found");
AstNode* lhsp = nodep->lhsp()->unlinkFrBack();
if (nodep->expect() == AstParseRefExp::PX_FTASK) {
// Put the FTaskRef under the final DOT
AstNodeFTaskRef* ftaskrefp = nodep->ftaskrefp()->castNodeFTaskRef();
if (!ftaskrefp) nodep->v3fatalSrc("Parseref indicates FTASKref but none found");
ftaskrefp->name(m_rightParsep->name());
ftaskrefp->unlinkFrBack();
if (ftaskrefp->packagep()) {
// Can remove the parse stack entirely and V3LinkDot will deal with it natively
lhsp = ftaskrefp;
} else {
m_rightParsep->ftaskrefp(ftaskrefp);
}
}
nodep->replaceWith(lhsp);
nodep->deleteTree(); nodep=NULL;
}
m_exp = lastExp;
m_rightParsep = lastRightp;
}
else { // inside existing stack
nodep->expect(m_exp);
m_rightParsep = nodep;
// Move the start marker down to a standalone parse reference
if (m_needStart) { nodep->start(true); m_needStart = false; }
} }
} }
virtual void visit(AstDot* nodep, AstNUser*) { virtual void visit(AstDot* nodep, AstNUser*) {
UINFO(5," "<<nodep<<endl); UINFO(5," "<<nodep<<endl);
cleanFileline(nodep); if (!nodep->user1SetOnce()) { // Process only once.
if (m_inModDot) { // Already under dot, so this is {modulepart} DOT {modulepart} cleanFileline(nodep);
m_dotText = ""; if (m_exp == AstParseRefExp::PX_NONE) nodep->v3fatalSrc("Tree syntax error: Not expecting "<<nodep->type()<<" under a "<<nodep->backp()->type());
AstParseRefExp lastExp = m_exp;
m_exp = AstParseRefExp::PX_PREDOT;
if (m_needStart) { nodep->start(true); m_needStart = false; }
nodep->lhsp()->iterateAndNext(*this); nodep->lhsp()->iterateAndNext(*this);
string namelhs = m_dotText; m_exp = lastExp;
m_dotText = "";
nodep->rhsp()->iterateAndNext(*this); nodep->rhsp()->iterateAndNext(*this);
m_dotText = namelhs + "." + m_dotText;
} else { // Not in ModDot, so this is {modulepart} DOT {name}
m_inModDot = true;
m_dotText = "";
nodep->lhsp()->iterateAndNext(*this);
string namelhs = m_dotText;
m_inModDot = false;
m_dotText = "";
nodep->rhsp()->iterateAndNext(*this);
m_dotText = namelhs;
nodep->replaceWith(nodep->rhsp()->unlinkFrBack()); nodep->deleteTree(); nodep=NULL;
} }
} }
virtual void visit(AstSelBit* nodep, AstNUser*) { virtual void visit(AstSelBit* nodep, AstNUser*) {
if (!nodep->user1SetOnce()) { // Process only once. if (!nodep->user1SetOnce()) { // Process only once.
cleanFileline(nodep); cleanFileline(nodep);
if (m_inModDot) { // Already under dot, so this is {modulepart} DOT {modulepart} if (m_exp==AstParseRefExp::PX_FTASK) {
m_dotText = ""; nodep->v3error("Syntax Error: Range selection '[]' is not allowed as part of function/task names");
nodep->lhsp()->iterateAndNext(*this);
if (AstConst* constp = nodep->rhsp()->castConst()) {
string index = AstNode::encodeNumber(constp->toSInt());
m_dotText = m_dotText+"__BRA__"+index+"__KET__";
} else {
nodep->v3error("Unsupported: Non-constant inside []'s in the cell part of a dotted reference");
}
// And pass up m_dotText
} else if (m_exp==AstParseRefExp::PX_FUNC) {
nodep->v3error("Syntax Error: Range selection '[]' is not allowed as part of function names");
} else { } else {
nodep->lhsp()->iterateAndNext(*this); nodep->lhsp()->iterateAndNext(*this);
AstParseRefExp lastExp = m_exp; AstParseRefExp lastExp = m_exp;
AstText* lasttextp = m_baseTextp;
{ {
m_exp = AstParseRefExp::PX_NONE; m_exp = AstParseRefExp::PX_NONE;
nodep->rhsp()->iterateAndNext(*this); nodep->rhsp()->iterateAndNext(*this);
} }
m_baseTextp = lasttextp;
m_exp = lastExp; m_exp = lastExp;
} }
} }
@ -223,40 +193,24 @@ private:
// Excludes simple AstSel, see above // Excludes simple AstSel, see above
if (!nodep->user1SetOnce()) { // Process only once. if (!nodep->user1SetOnce()) { // Process only once.
cleanFileline(nodep); cleanFileline(nodep);
if (m_inModDot) { // Already under dot, so this is {modulepart} DOT {modulepart} if (m_exp == AstParseRefExp::PX_PREDOT) { // Already under dot, so this is {modulepart} DOT {modulepart}
nodep->v3error("Syntax Error: Range ':', '+:' etc are not allowed in the cell part of a dotted reference"); nodep->v3error("Syntax Error: Range ':', '+:' etc are not allowed in the cell part of a dotted reference");
} else if (m_exp==AstParseRefExp::PX_FUNC) { } else if (m_exp==AstParseRefExp::PX_FTASK) {
nodep->v3error("Syntax Error: Range ':', '+:' etc are not allowed as part of function names"); nodep->v3error("Syntax Error: Range ':', '+:' etc are not allowed as part of function/task names");
} else if (m_exp==AstParseRefExp::PX_VAR_MEM) { } else if (m_exp==AstParseRefExp::PX_VAR_MEM) {
nodep->v3error("Syntax Error: Range ':', '+:' etc are not allowed when expecting memory reference"); nodep->v3error("Syntax Error: Range ':', '+:' etc are not allowed when expecting memory reference");
} else { } else {
nodep->lhsp()->iterateAndNext(*this); nodep->lhsp()->iterateAndNext(*this);
AstParseRefExp lastExp = m_exp; AstParseRefExp lastExp = m_exp;
AstText* lasttextp = m_baseTextp;
{ {
m_exp = AstParseRefExp::PX_NONE; m_exp = AstParseRefExp::PX_NONE;
nodep->rhsp()->iterateAndNext(*this); nodep->rhsp()->iterateAndNext(*this);
nodep->thsp()->iterateAndNext(*this); nodep->thsp()->iterateAndNext(*this);
} }
m_baseTextp = lasttextp;
m_exp = lastExp; m_exp = lastExp;
} }
} }
} }
virtual void visit(AstText* nodep, AstNUser*) {
if (!nodep->user1SetOnce()) { // Process only once.
cleanFileline(nodep);
if (m_exp != AstParseRefExp::PX_NONE) {
UINFO(7," "<<nodep<<endl);
if (m_inModDot) { // Dotted part, just pass up
m_dotText = nodep->text();
} else {
if (m_baseTextp) nodep->v3fatalSrc("Multiple low-level ParseRef text's found; which one is var name?");
m_baseTextp = nodep;
}
}
}
}
virtual void visit(AstEnumItem* nodep, AstNUser*) { virtual void visit(AstEnumItem* nodep, AstNUser*) {
// Expand ranges // Expand ranges
cleanFileline(nodep); cleanFileline(nodep);
@ -470,14 +424,14 @@ private:
public: public:
// CONSTUCTORS // CONSTUCTORS
LinkParseVisitor(AstNetlist* rootp) { LinkParseVisitor(AstNetlist* rootp) {
m_inModDot = false;
m_exp = AstParseRefExp::PX_NONE;
m_baseTextp = NULL;
m_varp = NULL; m_varp = NULL;
m_exp = AstParseRefExp::PX_NONE;
m_modp = NULL; m_modp = NULL;
m_inAlways = false; m_inAlways = false;
m_inGenerate = false; m_inGenerate = false;
m_needStart = false;
m_valueModp = NULL; m_valueModp = NULL;
m_rightParsep = NULL;
rootp->accept(*this); rootp->accept(*this);
} }
virtual ~LinkParseVisitor() {} virtual ~LinkParseVisitor() {}

22
src/verilog.y
View File

@ -2135,17 +2135,17 @@ for_step<nodep>: // IEEE: for_step
//************************************************ //************************************************
// Functions/tasks // Functions/tasks
taskRef<ftaskrefp>: // IEEE: part of tf_call taskRef<parserefp>: // IEEE: part of tf_call
idDotted { $$ = new AstTaskRef($1->fileline(),new AstParseRef($1->fileline(), AstParseRefExp::PX_TASK, $1),NULL);} idDotted { $$ = new AstParseRef($1->fileline(), AstParseRefExp::PX_FTASK, "", $1, new AstTaskRef($1->fileline(),"",NULL)); $$->start(true); }
| idDotted '(' list_of_argumentsE ')' { $$ = new AstTaskRef($1->fileline(),new AstParseRef($1->fileline(), AstParseRefExp::PX_TASK, $1),$3);} | idDotted '(' list_of_argumentsE ')' { $$ = new AstParseRef($1->fileline(), AstParseRefExp::PX_FTASK, "", $1, new AstTaskRef($1->fileline(),"",$3)); $$->start(true); }
//UNSUP: package_scopeIdFollows idDotted { $$ = new AstTaskRef($1->fileline(),new AstParseRef($2->fileline(), AstParseRefExp::PX_TASK, $2),NULL);} //UNSUP: package_scopeIdFollows idDotted { }
//UNSUP: package_scopeIdFollows idDotted '(' list_of_argumentsE ')' { $$ = new AstTaskRef($1->fileline(),new AstParseRef($2->fileline(), AstParseRefExp::PX_TASK, $2),$4);} //UNSUP: package_scopeIdFollows idDotted '(' list_of_argumentsE ')' { }
//UNSUP: idDotted is really just id to allow dotted method calls //UNSUP: idDotted is really just id to allow dotted method calls
; ;
funcRef<ftaskrefp>: // IEEE: part of tf_call funcRef<parserefp>: // IEEE: part of tf_call
idDotted '(' list_of_argumentsE ')' { $$ = new AstFuncRef($2,new AstParseRef($1->fileline(), AstParseRefExp::PX_FUNC, $1), $3); } idDotted '(' list_of_argumentsE ')' { $$ = new AstParseRef($1->fileline(), AstParseRefExp::PX_FTASK, "", $1, new AstFuncRef($2, "", $3)); $$->start(true); }
| package_scopeIdFollows idDotted '(' list_of_argumentsE ')' { $$ = new AstFuncRef($3,new AstParseRef($2->fileline(), AstParseRefExp::PX_FUNC, $2), $4); $$->packagep($1); } | package_scopeIdFollows idDotted '(' list_of_argumentsE ')' { AstFuncRef* f=new AstFuncRef($3,"",$4); f->packagep($1); $$ = new AstParseRef($2->fileline(), AstParseRefExp::PX_FTASK, "", $2, f); $$->start(true); }
//UNSUP: idDotted is really just id to allow dotted method calls //UNSUP: idDotted is really just id to allow dotted method calls
; ;
@ -2978,12 +2978,12 @@ variable_lvalueConcList<nodep>: // IEEE: part of variable_lvalue: '{' variable_l
// VarRef to a Memory // VarRef to a Memory
varRefMem<parserefp>: varRefMem<parserefp>:
idDotted { $$ = new AstParseRef($1->fileline(), AstParseRefExp::PX_VAR_MEM, $1); } idDotted { $$ = new AstParseRef($1->fileline(), AstParseRefExp::PX_VAR_MEM, "", $1, NULL); $$->start(true); }
; ;
// VarRef to dotted, and/or arrayed, and/or bit-ranged variable // VarRef to dotted, and/or arrayed, and/or bit-ranged variable
idClassSel<parserefp>: // Misc Ref to dotted, and/or arrayed, and/or bit-ranged variable idClassSel<parserefp>: // Misc Ref to dotted, and/or arrayed, and/or bit-ranged variable
idDotted { $$ = new AstParseRef($1->fileline(), AstParseRefExp::PX_VAR_ANY, $1); } idDotted { $$ = new AstParseRef($1->fileline(), AstParseRefExp::PX_VAR_ANY, "", $1, NULL); $$->start(true); }
// // IEEE: [ implicit_class_handle . | package_scope ] hierarchical_variable_identifier select // // IEEE: [ implicit_class_handle . | package_scope ] hierarchical_variable_identifier select
//UNSUP yTHIS '.' idDotted { UNSUP } //UNSUP yTHIS '.' idDotted { UNSUP }
//UNSUP ySUPER '.' idDotted { UNSUP } //UNSUP ySUPER '.' idDotted { UNSUP }
@ -3008,7 +3008,7 @@ idDottedMore<nodep>:
// id below includes: // id below includes:
// enum_identifier // enum_identifier
idArrayed<nodep>: // IEEE: id + select idArrayed<nodep>: // IEEE: id + select
id { $$ = new AstText($<fl>1,*$1); } id { $$ = new AstParseRef($<fl>1,AstParseRefExp::PX_TEXT,*$1,NULL,NULL); }
// // IEEE: id + part_select_range/constant_part_select_range // // IEEE: id + part_select_range/constant_part_select_range
| idArrayed '[' expr ']' { $$ = new AstSelBit($2,$1,$3); } // Or AstArraySel, don't know yet. | idArrayed '[' expr ']' { $$ = new AstSelBit($2,$1,$3); } // Or AstArraySel, don't know yet.
| idArrayed '[' constExpr ':' constExpr ']' { $$ = new AstSelExtract($2,$1,$3,$5); } | idArrayed '[' constExpr ':' constExpr ']' { $$ = new AstSelExtract($2,$1,$3,$5); }

7
test_regress/t/t_var_notfound_bad.pl
View File

@ -10,11 +10,12 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
compile ( compile (
fails=>1, fails=>1,
expect=> expect=>
'%Error: t/t_var_notfound_bad.v:\d+: Can\'t find definition of signal: nf '%Error: t/t_var_notfound_bad.v:\d+: Can\'t find definition of variable: nf
%Error: t/t_var_notfound_bad.v:\d+: Can\'t find definition of \'subsubz\' in dotted signal: sub.subsubz.inss %Error: t/t_var_notfound_bad.v:\d+: Can\'t find definition of \'subsubz\' in dotted scope/variable: sub.subsubz
%Error: Known scopes under \'inss\': subsub %Error: Known scopes under \'sub\': subsub
%Error: t/t_var_notfound_bad.v:\d+: Can\'t find definition of task/function: nofunc %Error: t/t_var_notfound_bad.v:\d+: Can\'t find definition of task/function: nofunc
%Error: t/t_var_notfound_bad.v:\d+: Can\'t find definition of task/function: notask %Error: t/t_var_notfound_bad.v:\d+: Can\'t find definition of task/function: notask
%Error: t/t_var_notfound_bad.v:\d+: Found definition of \'a_var\' as a VAR but expected a task/function
%Error: Exiting due to.*', %Error: Exiting due to.*',
); );

2
test_regress/t/t_var_notfound_bad.v
View File

@ -6,6 +6,7 @@
module t (/*AUTOARG*/); module t (/*AUTOARG*/);
integer i; integer i;
integer a_var;
sub sub (); sub sub ();
@ -14,6 +15,7 @@ module t (/*AUTOARG*/);
sub.subsubz.inss = 0; // subsub not found sub.subsubz.inss = 0; // subsub not found
i = nofunc(); // nofunc not found i = nofunc(); // nofunc not found
notask(); // notask not found notask(); // notask not found
a_var(); // Calling variable as task
$finish; $finish;
end end
endmodule endmodule