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Add simplify_type<const WeakVH>; simplify IndVarSimplify

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r240214 fixed some UB in IndVarSimplify, and it needed a temporary
`WeakVH` to do it.  Add `simplify_type<const WeakVH>` so that this
temporary isn't necessary.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240599 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith
2015-06-24 22:23:21 +00:00
parent 72260ba601
commit a0b4ef1f70
2 changed files with 10 additions and 9 deletions
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12
include/llvm/IR/ValueHandle.h
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@@ -159,11 +159,13 @@ public:
// Specialize simplify_type to allow WeakVH to participate in
// dyn_cast, isa, etc.
template<> struct simplify_type<WeakVH> {
typedef Value* SimpleType;
static SimpleType getSimplifiedValue(WeakVH &WVH) {
return WVH;
}
template <> struct simplify_type<WeakVH> {
typedef Value *SimpleType;
static SimpleType getSimplifiedValue(WeakVH &WVH) { return WVH; }
};
template <> struct simplify_type<const WeakVH> {
typedef Value *SimpleType;
static SimpleType getSimplifiedValue(const WeakVH &WVH) { return WVH; }
};
/// \brief Value handle that asserts if the Value is deleted.