]> Cypherpunks repositories - gostls13.git/commit
cmd/compile: on amd64 use 32bits copies for 64bits copies of 32bits values
authorJorropo <jorropo.pgm@gmail.com>
Sat, 20 Dec 2025 13:11:35 +0000 (14:11 +0100)
committerGopher Robot <gobot@golang.org>
Fri, 23 Jan 2026 20:24:56 +0000 (12:24 -0800)
commit478d86446e88dc9e0b46e08914cb564d7c705d1e
tree886b922658ff0511cce29dd9b3acaebab1aae534
parent8f739162e6479e98b0950ac9dc2f69cd79031be2
cmd/compile: on amd64 use 32bits copies for 64bits copies of 32bits values

Fixes #76449

This saves a single byte for the REX prefix per OpCopy it triggers on.

Change-Id: I1eab364d07354555ba2f23ffd2f9c522d4a04bd0
Reviewed-on: https://go-review.googlesource.com/c/go/+/731640
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Jorropo <jorropo.pgm@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
src/cmd/compile/internal/amd64/ssa.go
src/cmd/compile/internal/ssa/_gen/AMD64latelower.rules
src/cmd/compile/internal/ssa/_gen/ARM64latelower.rules
src/cmd/compile/internal/ssa/rewrite.go
src/cmd/compile/internal/ssa/rewriteAMD64latelower.go
src/cmd/compile/internal/ssa/rewriteARM64latelower.go
test/codegen/constants.go