microsoft/clc: Move lower_alu to optimization loop
The int64 lowering can introduce mul_high instructions which need to be lowered away by lower_alu.
This fixes a regression from 0ad192ba.
/cc @bbrezillon
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The int64 lowering can introduce mul_high instructions which need to be lowered away by lower_alu.
This fixes a regression from 0ad192ba.
/cc @bbrezillon