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* ValueMapper: fix assertion when null-mapping a constant for linking metadataMehdi Amini2016-05-281-0/+11
Summary: When RF_NullMapMissingGlobalValues is set, mapValue can return null for GlobalValue. When mapping the operands of a constant that is referenced from metadata, we need to handle this case and actually return null instead of mapping this constant. Reviewers: dexonsmith, rafael Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D20713 llvm-svn: 271129
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