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Parse undef and unreachable

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17053 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-10-16 18:17:13 +00:00
parent c17edbdeeb
commit 16710e9574
3 changed files with 24 additions and 4 deletions
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3
lib/AsmParser/Lexer.l
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@ -188,6 +188,7 @@ external { return EXTERNAL; }
implementation { return IMPLEMENTATION; }
zeroinitializer { return ZEROINITIALIZER; }
\.\.\. { return DOTDOTDOT; }
undef { return UNDEF; }
null { return NULL_TOK; }
to { return TO; }
except { RET_TOK(TermOpVal, Unwind, UNWIND); }
@ -247,7 +248,7 @@ br { RET_TOK(TermOpVal, Br, BR); }
switch { RET_TOK(TermOpVal, Switch, SWITCH); }
invoke { RET_TOK(TermOpVal, Invoke, INVOKE); }
unwind { RET_TOK(TermOpVal, Unwind, UNWIND); }
unreachable { RET_TOK(TermOpVal, Unreachable, UNREACHABLE); }
malloc { RET_TOK(MemOpVal, Malloc, MALLOC); }
alloca { RET_TOK(MemOpVal, Alloca, ALLOCA); }

8
lib/AsmParser/ParserInternals.h
View File

@ -72,7 +72,7 @@ static inline void ThrowException(const std::string &message,
struct ValID {
enum {
NumberVal, NameVal, ConstSIntVal, ConstUIntVal, ConstFPVal, ConstNullVal,
ConstantVal,
ConstUndefVal, ConstantVal,
} Type;
union {
@ -108,6 +108,10 @@ struct ValID {
ValID D; D.Type = ConstNullVal; return D;
}
static ValID createUndef() {
ValID D; D.Type = ConstUndefVal; return D;
}
static ValID create(Constant *Val) {
ValID D; D.Type = ConstantVal; D.ConstantValue = Val; return D;
}
@ -130,6 +134,7 @@ struct ValID {
case NameVal : return Name;
case ConstFPVal : return ftostr(ConstPoolFP);
case ConstNullVal : return "null";
case ConstUndefVal : return "undef";
case ConstUIntVal :
case ConstSIntVal : return std::string("%") + itostr(ConstPool64);
case ConstantVal:
@ -152,6 +157,7 @@ struct ValID {
case ConstUIntVal: return UConstPool64 < V.UConstPool64;
case ConstFPVal: return ConstPoolFP < V.ConstPoolFP;
case ConstNullVal: return false;
case ConstUndefVal: return false;
case ConstantVal: return ConstantValue < V.ConstantValue;
default: assert(0 && "Unknown value type!"); return false;
}

17
lib/AsmParser/llvmAsmParser.y
View File

@ -298,6 +298,9 @@ static Value *getValNonImprovising(const Type *Ty, const ValID &D) {
ThrowException("Cannot create a a non pointer null!");
return ConstantPointerNull::get(cast<PointerType>(Ty));
case ValID::ConstUndefVal: // Is it an undef value?
return UndefValue::get(Ty);
case ValID::ConstantVal: // Fully resolved constant?
if (D.ConstantValue->getType() != Ty)
ThrowException("Constant expression type different from required type!");
@ -908,12 +911,12 @@ Module *llvm::RunVMAsmParser(const std::string &Filename, FILE *F) {
%token IMPLEMENTATION ZEROINITIALIZER TRUETOK FALSETOK BEGINTOK ENDTOK
%token DECLARE GLOBAL CONSTANT VOLATILE
%token TO DOTDOTDOT NULL_TOK CONST INTERNAL LINKONCE WEAK APPENDING
%token TO DOTDOTDOT NULL_TOK UNDEF CONST INTERNAL LINKONCE WEAK APPENDING
%token OPAQUE NOT EXTERNAL TARGET TRIPLE ENDIAN POINTERSIZE LITTLE BIG
%token DEPLIBS
// Basic Block Terminating Operators
%token <TermOpVal> RET BR SWITCH INVOKE UNWIND
%token <TermOpVal> RET BR SWITCH INVOKE UNWIND UNREACHABLE
// Binary Operators
%type <BinaryOpVal> ArithmeticOps LogicalOps SetCondOps // Binops Subcatagories
@ -1221,6 +1224,10 @@ ConstVal: Types '[' ConstVector ']' { // Nonempty unsized arr
$$ = ConstantPointerNull::get(PTy);
delete $1;
}
| Types UNDEF {
$$ = UndefValue::get($1->get());
delete $1;
}
| Types SymbolicValueRef {
const PointerType *Ty = dyn_cast<PointerType>($1->get());
if (Ty == 0)
@ -1687,6 +1694,9 @@ ConstValueRef : ESINT64VAL { // A reference to a direct constant
| NULL_TOK {
$$ = ValID::createNull();
}
| UNDEF {
$$ = ValID::createUndef();
}
| '<' ConstVector '>' { // Nonempty unsized packed vector
const Type *ETy = (*$2)[0]->getType();
int NumElements = $2->size();
@ -1858,6 +1868,9 @@ BBTerminatorInst : RET ResolvedVal { // Return with a result...
}
| UNWIND {
$$ = new UnwindInst();
}
| UNREACHABLE {
$$ = new UnreachableInst();
};