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baa40c68ac
The original code would fail for unsupported value types like i1, i8, and i16. This fix changes the code to only create a sub-register copy for i64 value types and all other types (i1/i8/i16/i32) just use the source register without any modifications. getRegClassFor() is now guarded by the i64 value type check, that guarantees that we always request a register for a valid value type. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214848 91177308-0d34-0410-b5e6-96231b3b80d8
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