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2516e7fb22
the destination operand or source operand of a memmove. It so happens that it was impossible for SROA to try to rewrite self-memmove where the operands are *identical*, because either such a think is volatile (and we don't rewrite) or it is non-volatile, and we don't even register it as a use of the alloca. However, making the 'IsDest' test *rely* on this subtle fact is... Very confusing for the reader. We should use the direct and readily available test of the Use* which gives us concrete information about which operand is being rewritten. No functionality changed, I hope! ;] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202103 91177308-0d34-0410-b5e6-96231b3b80d8
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