Merging r229352:
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r229352 | david.majnemer | 2015-02-15 23:02:09 -0500 (Sun, 15 Feb 2015) | 9 lines
IR: Properly return nullptr when getAggregateElement is out-of-bounds
We didn't properly handle the out-of-bounds case for
ConstantAggregateZero and UndefValue. This would manifest as a crash
when the constant folder was asked to fold a load of a constant global
whose struct type has no operands.
This fixes PR22595.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_35@232512
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