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Casting: assert that pointer arguments to isa<> are non-null.

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This silences several analyzer warnings within LLVM, and provides a slightly
nicer crash experience when someone calls isa<>, cast<>, or dyn_cast<> with
a null pointer.

llvm-svn: 164439
This commit is contained in:
Jordan Rose 2012-09-22 01:24:18 +00:00
parent 8632457a1a
commit f8bd27333f
1 changed files with 3 additions and 0 deletions
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3
include/llvm/Support/Casting.h
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@ -65,18 +65,21 @@ template <typename To, typename From> struct isa_impl_cl<To, const From> {
template <typename To, typename From> struct isa_impl_cl<To, From*> {
static inline bool doit(const From *Val) {
assert(Val && "isa<> used on a null pointer");
return isa_impl<To, From>::doit(*Val);
}
};
template <typename To, typename From> struct isa_impl_cl<To, const From*> {
static inline bool doit(const From *Val) {
assert(Val && "isa<> used on a null pointer");
return isa_impl<To, From>::doit(*Val);
}
};
template <typename To, typename From> struct isa_impl_cl<To, const From*const> {
static inline bool doit(const From *Val) {
assert(Val && "isa<> used on a null pointer");
return isa_impl<To, From>::doit(*Val);
}
};