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fix unsilenceable warnings on GCC 9 #41

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Feb 25, 2020
Merged

fix unsilenceable warnings on GCC 9 #41

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10 changes: 10 additions & 0 deletions llvm/include/llvm/ADT/ArrayRef.h
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Original file line number Diff line number Diff line change
Expand Up @@ -97,9 +97,19 @@ namespace llvm {
/*implicit*/ constexpr ArrayRef(const T (&Arr)[N]) : Data(Arr), Length(N) {}

/// Construct an ArrayRef from a std::initializer_list.
#if LLVM_GNUC_PREREQ(9, 0, 0)
// Disable gcc's warning in this constructor as it generates an enormous amount
// of messages. Anyone using ArrayRef should already be aware of the fact that
// it does not do lifetime extension.
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Winit-list-lifetime"
#endif
/*implicit*/ ArrayRef(const std::initializer_list<T> &Vec)
: Data(Vec.begin() == Vec.end() ? (T*)nullptr : Vec.begin()),
Length(Vec.size()) {}
#if LLVM_GNUC_PREREQ(9, 0, 0)
#pragma GCC diagnostic pop
#endif

/// Construct an ArrayRef<const T*> from ArrayRef<T*>. This uses SFINAE to
/// ensure that only ArrayRefs of pointers can be converted.
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