cmd/compile/internal/ssa: load constant values from abi.PtrType.Elem
This CL makes the generated code for reflect.TypeFor as simple as an
intrinsic function.
Fixes #75203
Change-Id: I7bb48787101f07e77ab5c583292e834c28a028d6
Reviewed-on: https://go-review.googlesource.com/c/go/+/700336
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Michael Pratt <mpratt@google.com>
Auto-Submit: Keith Randall <khr@golang.org>