Alex MacLean 310e798757
[NVPTX] Avoid introducing unnecessary ProxyRegs and Movs in ISel (#120486)
Avoid introducing `ProxyReg` and `MOV` nodes during ISel when lowering
`bitconvert` or similar operations. These nodes are all erased by a
later pass but not introducing them in the first place is simpler and
likely saves compile time.

Also remove redundant `MOV` instruction definitions.
2024-12-19 07:55:03 -08:00
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