================
@@ -1326,6 +1326,79 @@ bool RegisterCoalescer::reMaterializeDef(const
CoalescerPair &CP,
if (!TII->isAsCheapAsAMove(*DefMI))
return false;
+ // Skip rematerialization for physical registers used as return values within
+ // the same basic block to enable better coalescing.
+ if (DstReg.isPhysical()) {
----------------
antoniofrighetto wrote:
Could you please move this into a dedicated helper, e.g.,
`shouldSkipRematerializationForReturn` and add a brief doc-comment?
https://github.com/llvm/llvm-project/pull/163047
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