cmd/compile/internal/walk: remove reduceSlice

After CL 22425, there're two optimizations for slice expr which are
never applied during walk pass:


The order pass have already rewritten len/cap expression to use autotmp,
thus the same safe expression check will never fire. The code can now be
simplified by moving the only case left from reduceSlice to walkSlice,
then removing reduceSlice entirely.

Passes toolstash-check.

Change-Id: Ia8cfb15c8e96c186a214c17b42d0fee51b0d3a1c
Run-TryBot: Cuong Manh Le <>
Auto-Submit: Cuong Manh Le <>
Reviewed-by: Keith Randall <>
Reviewed-by: Matthew Dempsky <>
Reviewed-by: Keith Randall <>
TryBot-Result: Gopher Robot <>
1 file changed
tree: 60e021f8cb0a45023bbf92d06641c282226cdbab
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. codereview.cfg

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 3.0 Attributions license.

Our canonical Git repository is located at There is a mirror of the repository at

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

After downloading a binary release, visit for installation instructions.

Install From Source

If a binary distribution is not available for your combination of operating system and architecture, visit for source installation instructions.


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

To contribute, please read the contribution guidelines at

Note that the Go project uses the issue tracker for bug reports and proposals only. See for a list of places to ask questions about the Go language.