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Implement resolution of variables to the value of the variable once it gets a value

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7406 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-07-30 04:05:07 +00:00
parent ee6b5f69bd
commit 9b929aa749
4 changed files with 44 additions and 2 deletions
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16
support/tools/TableGen/Record.cpp
View File

@ -215,6 +215,9 @@ bool BitsInit::printAsUnset(std::ostream &OS) const {
return false;
}
// resolveReferences - If there are any field references that refer to fields
// that have been filled in, we can propagate the values now.
//
Init *BitsInit::resolveReferences(Record &R) {
bool Changed = false;
BitsInit *New = new BitsInit(getNumBits());
@ -309,7 +312,18 @@ Init *VarInit::getFieldInit(Record &R, const std::string &FieldName) const {
return 0;
}
/// resolveReferences - This method is used by classes that refer to other
/// variables which may not be defined at the time they expression is formed.
/// If a value is set for the variable later, this method will be called on
/// users of the value to allow the value to propagate out.
///
Init *VarInit::resolveReferences(Record &R) {
if (RecordVal *Val = R.getValue(VarName))
if (!dynamic_cast<UnsetInit*>(Val->getValue()))
return Val->getValue();
return this;
}
Init *VarBitInit::resolveReferences(Record &R) {
Init *I = getVariable()->resolveBitReference(R, getBitNum());

7
support/tools/TableGen/Record.h
View File

@ -365,6 +365,13 @@ public:
virtual RecTy *getFieldType(const std::string &FieldName) const;
virtual Init *getFieldInit(Record &R, const std::string &FieldName) const;
/// resolveReferences - This method is used by classes that refer to other
/// variables which may not be defined at the time they expression is formed.
/// If a value is set for the variable later, this method will be called on
/// users of the value to allow the value to propagate out.
///
virtual Init *resolveReferences(Record &R);
virtual void print(std::ostream &OS) const { OS << VarName; }
};

16
utils/TableGen/Record.cpp
View File

@ -215,6 +215,9 @@ bool BitsInit::printAsUnset(std::ostream &OS) const {
return false;
}
// resolveReferences - If there are any field references that refer to fields
// that have been filled in, we can propagate the values now.
//
Init *BitsInit::resolveReferences(Record &R) {
bool Changed = false;
BitsInit *New = new BitsInit(getNumBits());
@ -309,7 +312,18 @@ Init *VarInit::getFieldInit(Record &R, const std::string &FieldName) const {
return 0;
}
/// resolveReferences - This method is used by classes that refer to other
/// variables which may not be defined at the time they expression is formed.
/// If a value is set for the variable later, this method will be called on
/// users of the value to allow the value to propagate out.
///
Init *VarInit::resolveReferences(Record &R) {
if (RecordVal *Val = R.getValue(VarName))
if (!dynamic_cast<UnsetInit*>(Val->getValue()))
return Val->getValue();
return this;
}
Init *VarBitInit::resolveReferences(Record &R) {
Init *I = getVariable()->resolveBitReference(R, getBitNum());

7
utils/TableGen/Record.h
View File

@ -365,6 +365,13 @@ public:
virtual RecTy *getFieldType(const std::string &FieldName) const;
virtual Init *getFieldInit(Record &R, const std::string &FieldName) const;
/// resolveReferences - This method is used by classes that refer to other
/// variables which may not be defined at the time they expression is formed.
/// If a value is set for the variable later, this method will be called on
/// users of the value to allow the value to propagate out.
///
virtual Init *resolveReferences(Record &R);
virtual void print(std::ostream &OS) const { OS << VarName; }
};