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d04d5fde2e
The post-indexed instructions were missing the constraint, causing unpredictable STR instructions to be emitted. The earlyclobber constraint on the pre-indexed STR instructions is not strictly necessary, as the instruction selection for pre-indexed STR instructions goes through an additional layer of pseudo instructions which have the constraint defined, however it doesn't hurt to specify the constraint directly on the pre-indexed instructions as well, since at some point someone might create instances of them programmatically and then the constraint is definitely needed. This fixes PR20323. llvm-svn: 213369
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