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constify some methods and add a new Constant::getAggregateElement

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helper method for the common operation of extracting an element
out of a constant aggregate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148931 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2012-01-25 06:16:32 +00:00
parent 4ca829e895
commit 3d5ed2250e
3 changed files with 56 additions and 16 deletions
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7
include/llvm/Constant.h
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@@ -97,6 +97,13 @@ public:
/// constant exprs and other cases we can't handle, we return an empty vector.
void getVectorElements(SmallVectorImpl<Constant*> &Elts) const;
/// getAggregateElement - For aggregates (struct/array/vector) return the
/// constant that corresponds to the specified element if possible, or null if
/// not. This can return null if the element index is a ConstantExpr, or if
/// 'this' is a constant expr.
Constant *getAggregateElement(unsigned Elt) const;
Constant *getAggregateElement(Constant *Elt) const;
/// destroyConstant - Called if some element of this constant is no longer
/// valid. At this point only other constants may be on the use_list for this
/// constant. Any constants on our Use list must also be destroy'd. The