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The selection for G_ICMP is unfortunately not currently importable from SDAG due to the use of custom SDNodes. To support this, this selection method has an opcode table which has been generated by a script, indexed by various instruction properties. Ideally in future we will have a GISel native selection patterns that we can write in tablegen to improve on this. For selection of some types we also need support for G_ASHR and G_SHL which are generated as a result of legalization. This patch also adds support for them, generating the same code as SelectionDAG currently does. Differential Revision: https://reviews.llvm.org/D60436 llvm-svn: 358035 |
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