This is a follow-up for #37745 (comment) and #41197 (review).

• Review all the places where we use lvaInSsa, find where we need to check for CanBeReplacedWithItsField;

• Use optIsSsaLocal instead of CanBeReplacedWithItsField in all phases, maybe move it to LclVarDsc or just rename;

• Rename optIsSsaLocal to optGetSsaLocal ([release/5.0] Fix wrong copy prop after ASG(promoted LCL_VAR with 1 field, call). #41243 (comment))

• Design how to extend it for multiregs and multifields LclVars.

category:implementation
theme:value-numbering
skill-level:expert
cost:medium