| commit | c6118af55864916c2c3b1bca8e216e627f232bf3 | [log] [tgz] |
|---|---|---|
| author | Keith Randall <khr@google.com> | Mon Sep 17 14:46:07 2018 -0700 |
| committer | Keith Randall <khr@golang.org> | Tue Sep 18 20:27:09 2018 +0000 |
| tree | e0e07413df13dbaf1a6624b6724ad79c3a867771 | |
| parent | 83dfc3b001245f0b725afdc94c0b540fe1952d21 [diff] |
cmd/compile: don't do floating point optimization x+0 -> x That optimization is not valid if x == -0. The test is a bit tricky because 0 == -0. We distinguish 0 from -0 with 1/0 == inf, 1/-0 == -inf. This has been a bug since CL 24790 in Go 1.8. Probably doesn't warrant a backport. Fixes #27718 Note: the optimization x-0 -> x is actually valid. But it's probably best to take it out, so as to not confuse readers. Change-Id: I99f16a93b45f7406ec8053c2dc759a13eba035fa Reviewed-on: https://go-review.googlesource.com/135701 Reviewed-by: Cherry Zhang <cherryyz@google.com>
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