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Commit 30eff7f2 authored by Simon Pilgrim's avatar Simon Pilgrim
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[DAG] Attempt to replace a mul node with an existing umul_lohi/smul_lohi node (PR59217) 

As discussed on Issue #59217, under certain circumstances the DAG can generate duplicate MUL and MUL_LOHI nodes, often during MULO legalization.

This patch attempts to replace MUL nodes with additional uses of the LO result from the MUL_LOHI node

Differential Revision: https://reviews.llvm.org/D138790
parent 02db5603
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