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4fa71b66a8
This adds new SDNodes for signed/unsigned min/max. These nodes are built from select/icmp pairs matched at SDAGBuilder stage. This patch adds the nodes, as well as legalization support and sets them to be "expand" for all targets. NFC for now; this will be tested when I switch AArch64 to using these new nodes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237423 91177308-0d34-0410-b5e6-96231b3b80d8
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