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Add support for automatically created anonymous definitions.

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This implements Regression/TableGen/AnonDefinitionOnDemand.td


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23274 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-09-08 18:48:23 +00:00
parent d0d1d39541
commit a1207a5add
1 changed files with 30 additions and 1 deletions
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31
utils/TableGen/FileParser.y
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@ -291,6 +291,34 @@ Value : INTVAL {
}
delete $1;
} | ID '<' ValueListNE '>' {
// This is a CLASS<initvalslist> expression. This is supposed to synthesize
// a new anonymous definition, deriving from CLASS<initvalslist> with no
// body.
Record *Class = Records.getClass(*$1);
if (!Class) {
err() << "Expected a class, got '" << *$1 << "'!\n";
exit(1);
}
delete $1;
static unsigned AnonCounter = 0;
Record *OldRec = CurRec; // Save CurRec.
// Create the new record, set it as CurRec temporarily.
CurRec = new Record("anonymous.val."+utostr(AnonCounter++));
addSubClass(Class, *$3); // Add info about the subclass to CurRec.
delete $3; // Free up the template args.
CurRec->resolveReferences();
Records.addDef(CurRec);
// The result of the expression is a reference to the new record.
$$ = new DefInit(CurRec);
// Restore the old CurRec
CurRec = OldRec;
} | Value '{' BitList '}' {
$$ = $1->convertInitializerBitRange(*$3);
if ($$ == 0) {
@ -543,12 +571,13 @@ ClassInst : CLASS ObjectBody {
DefInst : DEF ObjectBody {
$2->resolveReferences();
// If ObjectBody has template arguments, it's an error.
if (!$2->getTemplateArgs().empty()) {
err() << "Def '" << $2->getName()
<< "' is not permitted to have template arguments!\n";
exit(1);
}
// If ObjectBody has template arguments, it's an error.
// Ensure redefinition doesn't happen.
if (Records.getDef($2->getName())) {
err() << "Def '" << $2->getName() << "' already defined!\n";
exit(1);