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Keith Randall 5a56d8848b cmd/compile: ensure we use allowed registers for input-clobbering instructions 
For instructions which clobber their input register, we make a second
copy of the input value so it is still available in a register for
future instructions.

That second copy might not respect the register input restrictions
for the instruction. So the second copy we make here can't actually
be used by the instruction - it should use the first copy, the second
copy is the one that will persist beyond the clobber.

Fixes #75063

Change-Id: I99acdc63f0c4e54567a174ff7ada601ae4e796b7
Reviewed-on: https://go-review.googlesource.com/c/go/+/697015
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: David Chase <drchase@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-08-18 12:15:08 -07:00
.github .github: update language change proposal template 2024-08-08 19:02:29 +00:00
api database/sql: allow drivers to override Scan behavior 2025-08-11 14:27:36 -07:00
doc database/sql: allow drivers to override Scan behavior 2025-08-11 14:27:36 -07:00
lib cmd/dist: test encoding/json/... with GOEXPERIMENT=jsonv2 2025-06-23 18:21:07 -07:00
misc misc/linkcheck: remove unused tool 2025-03-20 04:38:55 -07:00
src cmd/compile: ensure we use allowed registers for input-clobbering instructions 2025-08-18 12:15:08 -07:00
test cmd/compile: ensure we use allowed registers for input-clobbering instructions 2025-08-18 12:15:08 -07:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore runtime,internal: move runtime/internal/sys to internal/runtime/sys 2024-07-23 19:05:35 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00
CONTRIBUTING.md doc: normalize proposal-process links 2023-03-29 22:00:27 +00:00
go.env cmd/go: additional doc-inspired tests and bug fixes 2023-06-06 19:18:46 +00:00
LICENSE LICENSE: update per Google Legal 2024-08-09 14:54:31 +00:00
PATENTS LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
README.md README: fix CC BY license name 2024-07-22 17:45:27 +00:00
SECURITY.md SECURITY.md: update the Reporting a Vulnerability link 2023-09-22 21:17:24 +00:00

README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

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Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.

Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.

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Note that the Go project uses the issue tracker for bug reports and proposals only. See https://go.dev/wiki/Questions for a list of places to ask questions about the Go language.