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Chad Rosier
fe5c9cee80
[AArch64] Implement the isTruncateFree API.
In AArch64 i64 to i32 truncate operation is a subregister access. This allows more opportunities for LSR optmization to eliminate variables of different types (i32 and i64). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205925 91177308-0d34-0410-b5e6-96231b3b80d8
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