cmd/compile: share compiler allocations of similar shapes

Use the same allocator for, e.g., []int32 and []int8. Anything with
similar base shapes and be coerced into a single allocator, which helps
reuse memory more often.

There is not much unsafe in the compiler currently. This adds quite a bit,
joining cmd/compiler/internal/base/mapfile_mmap.go and some unsafe.Sizeof calls.

Change-Id: I95d6d6e47c42b9f0a45f3556f4d7605735e65d99
Reviewed-on: https://go-review.googlesource.com/c/go/+/461084
Reviewed-by: Michael Pratt <mpratt@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Keith Randall <khr@golang.org>

0 files changed, 0 insertions, 0 deletions