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Keith Randall 6224db9b4d cmd/compile: schedule values with no in-block uses later 
When scheduling a block, deprioritize values whose results aren't used
until subsequent blocks.

For #58166, this has the effect of pushing the induction variable increment
to the end of the block, past all the other uses of the pre-incremented value.

Do this only with optimizations on. Debuggers have a preference for values
in source code order, which this CL can degrade.

Fixes #58166
Fixes #57976

Change-Id: I40d5885c661b142443c6d4702294c8abe8026c4f
Reviewed-on: https://go-review.googlesource.com/c/go/+/463751
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Keith Randall <khr@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-02-01 18:41:07 +00:00
.github .github: suggest using private browsing in pkgsite template 2023-01-03 18:52:47 +00:00
api reflect,runtime: add Value.Clear 2023-01-30 16:00:58 +00:00
doc doc: move Go 1.20 release notes to x/website 2023-01-30 21:10:03 +00:00
lib/time time/tzdata: generate zip constant during cmd/dist 2023-01-17 22:30:53 +00:00
misc misc/wasm: use NodeJS crypto library 2023-01-30 18:49:42 +00:00
src cmd/compile: schedule values with no in-block uses later 2023-02-01 18:41:07 +00:00
test cmd/compile: schedule values with no in-block uses later 2023-02-01 18:41:07 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
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README.md

The Go Programming Language

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

Gopher image Gopher image by Renee French, licensed under Creative Commons 4.0 Attributions license.

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.

Download and Install

Binary Distributions

Official binary distributions are available at https://go.dev/dl/.

After downloading a binary release, visit https://go.dev/doc/install for installation instructions.

Install From Source

If a binary distribution is not available for your combination of operating system and architecture, visit https://go.dev/doc/install/source for source installation instructions.

Contributing

Go is the work of thousands of contributors. We appreciate your help!

To contribute, please read the contribution guidelines at https://go.dev/doc/contribute.

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.