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42742afe74
Add partial instruction selection for intrinsics like this: ``` declare i32 @llvm.aarch64.stlxr(i64, i32*) ``` (This only handles the case where a G_ZEXT is feeding the intrinsic.) Also make sure that the added store instruction actually has the memory op from the original G_STORE. Update select-stlxr-intrin.mir and arm64-ldxr-stxr.ll. Differential Revision: https://reviews.llvm.org/D65355 llvm-svn: 367163
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