David Green 4c6b8825e8
[DAG] Fold mul 0 -> 0 when expanding mul into parts. (#168780)
If the upper bits are zero, but we expand multiply then immediately
convert the multiple into a libcall, there is no opportunity to optimize
away the mul. Do so in getNode to make sure extending multiplies
optimise cleanly.
2025-12-05 07:58:28 +00:00
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