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Fix Type::isSized() to realize that "{ opaque }" is not sized

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14585 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-07-02 23:20:17 +00:00
parent cf27afb64e
commit c5f143b6e7
2 changed files with 22 additions and 2 deletions
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9
include/llvm/Type.h
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@ -206,8 +206,8 @@ public:
/// TargetData subsystem to do this.
///
bool isSized() const {
return ID != VoidTyID && ID != TypeTyID &&
ID != FunctionTyID && ID != LabelTyID && ID != OpaqueTyID;
return (ID >= BoolTyID && ID <= DoubleTyID) || ID == PointerTyID ||
isSizedDerivedType();
}
/// getPrimitiveSize - Return the basic size of this type if it is a primative
@ -306,6 +306,11 @@ public:
RefCountIsZero();
}
private:
/// isSizedDerivedType - Derived types like structures and arrays are sized
/// iff all of the members of the type are sized as well. Since asking for
/// their size is relatively uncommon, move this operation out of line.
bool isSizedDerivedType() const;
virtual void RefCountIsZero() const {
abort(); // only on derived types!
}

15
lib/VMCore/Type.cpp
View File

@ -159,6 +159,21 @@ unsigned Type::getPrimitiveSize() const {
}
}
/// isSizedDerivedType - Derived types like structures and arrays are sized
/// iff all of the members of the type are sized as well. Since asking for
/// their size is relatively uncommon, move this operation out of line.
bool Type::isSizedDerivedType() const {
if (const ArrayType *ATy = dyn_cast<ArrayType>(this))
return ATy->getElementType()->isSized();
if (!isa<StructType>(this)) return false;
// Okay, our struct is sized if all of the elements are...
for (subtype_iterator I = subtype_begin(), E = subtype_end(); I != E; ++I)
if (!(*I)->isSized()) return false;
return true;
}
/// getForwardedTypeInternal - This method is used to implement the union-find
/// algorithm for when a type is being forwarded to another type.