[DAG][X86] Fold mgather/mscatter/etc with splat index #65980
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A splat index means the operation is reading from (writing to) the same memory location. Generally, zero is the cheapest value to splat. As such, we'd prefer to add the splatted value to the base, and use a constant zero as the index operand.
ZijunZhaoCCK
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Sep 19, 2023
A splat index means the operation is reading from (writing to) the same memory location. Generally, zero is the cheapest value to splat. As such, we'd prefer to add the splatted value to the base, and use a constant zero as the index operand.
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A splat index means the operation is reading from (writing to) the same memory location. Generally, zero is the cheapest value to splat. As such, we'd prefer to add the splatted value to the base, and use a constant zero as the index operand.