[dev.regabi] cmd/compile: use ir.DoChildren directly in inlining
[dev.regabi] cmd/compile: use ir.DoChildren directly in inlining

Passes toolstash -cmp.

Change-Id: Ie35e8163fa0e61ed9e1b259929c8cbe82ee5301e
Reviewed-on: https://go-review.googlesource.com/c/go/+/282212
Run-TryBot: Baokun Lee <b86f6db284d374188d561d46b45b188d5631609a@golangcn.org>
TryBot-Result: Go Bot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Cuong Manh Le <54b4457f1dff6823379654eb5867596497ba782f@gmail.com>
Trust: Baokun Lee <b86f6db284d374188d561d46b45b188d5631609a@golangcn.org>

cloudflare/go,cloudflare/go,nawawi/go,cloudflare/go,CAFxX/go,nawawi/go,cloudflare/go,golang/go,CAFxX/go,nawawi/go,CAFxX/go,golang/go,CAFxX/go,CAFxX/go,nawawi/go,nawawi/go,cloudflare/go,nawawi/go,golang/go,nawawi/go,cloudflare/go,golang/go,nawawi/go,golang/go,golang/go,cloudflare/go,CAFxX/go,golang/go,CAFxX/go,golang/go,CAFxX/go,cloudflare/go