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Parse undef and unreachable
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17053 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -188,6 +188,7 @@ external { return EXTERNAL; }
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implementation { return IMPLEMENTATION; }
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zeroinitializer { return ZEROINITIALIZER; }
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\.\.\. { return DOTDOTDOT; }
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undef { return UNDEF; }
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null { return NULL_TOK; }
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to { return TO; }
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except { RET_TOK(TermOpVal, Unwind, UNWIND); }
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@ -247,7 +248,7 @@ br { RET_TOK(TermOpVal, Br, BR); }
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switch { RET_TOK(TermOpVal, Switch, SWITCH); }
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invoke { RET_TOK(TermOpVal, Invoke, INVOKE); }
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unwind { RET_TOK(TermOpVal, Unwind, UNWIND); }
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unreachable { RET_TOK(TermOpVal, Unreachable, UNREACHABLE); }
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malloc { RET_TOK(MemOpVal, Malloc, MALLOC); }
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alloca { RET_TOK(MemOpVal, Alloca, ALLOCA); }
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@ -72,7 +72,7 @@ static inline void ThrowException(const std::string &message,
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struct ValID {
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enum {
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NumberVal, NameVal, ConstSIntVal, ConstUIntVal, ConstFPVal, ConstNullVal,
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ConstantVal,
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ConstUndefVal, ConstantVal,
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} Type;
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union {
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@ -108,6 +108,10 @@ struct ValID {
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ValID D; D.Type = ConstNullVal; return D;
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}
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static ValID createUndef() {
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ValID D; D.Type = ConstUndefVal; return D;
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}
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static ValID create(Constant *Val) {
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ValID D; D.Type = ConstantVal; D.ConstantValue = Val; return D;
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}
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@ -130,6 +134,7 @@ struct ValID {
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case NameVal : return Name;
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case ConstFPVal : return ftostr(ConstPoolFP);
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case ConstNullVal : return "null";
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case ConstUndefVal : return "undef";
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case ConstUIntVal :
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case ConstSIntVal : return std::string("%") + itostr(ConstPool64);
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case ConstantVal:
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@ -152,6 +157,7 @@ struct ValID {
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case ConstUIntVal: return UConstPool64 < V.UConstPool64;
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case ConstFPVal: return ConstPoolFP < V.ConstPoolFP;
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case ConstNullVal: return false;
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case ConstUndefVal: return false;
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case ConstantVal: return ConstantValue < V.ConstantValue;
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default: assert(0 && "Unknown value type!"); return false;
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}
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@ -298,6 +298,9 @@ static Value *getValNonImprovising(const Type *Ty, const ValID &D) {
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ThrowException("Cannot create a a non pointer null!");
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return ConstantPointerNull::get(cast<PointerType>(Ty));
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case ValID::ConstUndefVal: // Is it an undef value?
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return UndefValue::get(Ty);
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case ValID::ConstantVal: // Fully resolved constant?
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if (D.ConstantValue->getType() != Ty)
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ThrowException("Constant expression type different from required type!");
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@ -908,12 +911,12 @@ Module *llvm::RunVMAsmParser(const std::string &Filename, FILE *F) {
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%token IMPLEMENTATION ZEROINITIALIZER TRUETOK FALSETOK BEGINTOK ENDTOK
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%token DECLARE GLOBAL CONSTANT VOLATILE
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%token TO DOTDOTDOT NULL_TOK CONST INTERNAL LINKONCE WEAK APPENDING
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%token TO DOTDOTDOT NULL_TOK UNDEF CONST INTERNAL LINKONCE WEAK APPENDING
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%token OPAQUE NOT EXTERNAL TARGET TRIPLE ENDIAN POINTERSIZE LITTLE BIG
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%token DEPLIBS
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// Basic Block Terminating Operators
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%token <TermOpVal> RET BR SWITCH INVOKE UNWIND
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%token <TermOpVal> RET BR SWITCH INVOKE UNWIND UNREACHABLE
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// Binary Operators
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%type <BinaryOpVal> ArithmeticOps LogicalOps SetCondOps // Binops Subcatagories
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@ -1221,6 +1224,10 @@ ConstVal: Types '[' ConstVector ']' { // Nonempty unsized arr
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$$ = ConstantPointerNull::get(PTy);
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delete $1;
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}
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| Types UNDEF {
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$$ = UndefValue::get($1->get());
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delete $1;
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}
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| Types SymbolicValueRef {
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const PointerType *Ty = dyn_cast<PointerType>($1->get());
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if (Ty == 0)
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@ -1687,6 +1694,9 @@ ConstValueRef : ESINT64VAL { // A reference to a direct constant
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| NULL_TOK {
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$$ = ValID::createNull();
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}
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| UNDEF {
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$$ = ValID::createUndef();
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}
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| '<' ConstVector '>' { // Nonempty unsized packed vector
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const Type *ETy = (*$2)[0]->getType();
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int NumElements = $2->size();
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@ -1858,6 +1868,9 @@ BBTerminatorInst : RET ResolvedVal { // Return with a result...
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}
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| UNWIND {
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$$ = new UnwindInst();
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}
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| UNREACHABLE {
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$$ = new UnreachableInst();
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};
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