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[ADT] Replace a member initializer of a union with an explicit

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constructor.

This breaking an old/weird host compiler is my best bet for the current
crashes I'm getting from bots since this functionality was added to this
ADT.

llvm-svn: 339975
This commit is contained in:
Chandler Carruth 2018-08-17 01:10:33 +00:00
parent 3316b3f538
commit 192f103b34
1 changed files with 6 additions and 2 deletions
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8
include/llvm/ADT/PointerSumType.h
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@ -80,8 +80,12 @@ template <typename TagT, typename... MemberTs> class PointerSumType {
// when we *read* a value, we copy the underlying storage out to avoid relying
// on one member or the other being active.
union StorageT {
// Ensure we get a null default constructed value.
uintptr_t Value = 0;
// Ensure we get a null default constructed value. We don't use a member
// initializer because some compilers seem to not implement those correctly
// for a union.
StorageT() : Value(0) {}
uintptr_t Value;
typename HelperT::template Lookup<HelperT::MinTag>::PointerT MinTagPointer;
};