Keith Randall 9ed0fb42e3 cmd/compile: add indexed memory modification ops to amd64
name            old time/op  new time/op  delta
Modify-16        404ns ± 1%   365ns ± 1%  -9.73%  (p=0.000 n=10+10)
ConstModify-16   407ns ± 0%   385ns ± 2%  -5.56%  (p=0.000 n=9+10)

Seems to generally help generated code.

Binary size change is in the noise.

Change-Id: I57891bfaf0f7dfc5d143bb9f7ebafc7079d2614f
Reviewed-on: https://go-review.googlesource.com/c/go/+/228098
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
2020-04-30 17:21:31 +00:00
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The test directory contains tests of the Go tool chain and runtime. It includes black box tests, regression tests, and error output tests. They are run as part of all.bash.

To run just these tests, execute:

../bin/go run run.go

Standard library tests should be written as regular Go tests in the appropriate package.

The tool chain and runtime also have regular Go tests in their packages. The main reasons to add a new test to this directory are:

  • it is most naturally expressed using the test runner; or
  • it is also applicable to gccgo and other Go tool chains.