tree 7d2e56438068546ce74124f1fabfaef6743b6d1b
parent 71a6a44428feb844b9dd3c4c8e16be8dee2fd8fa
author David Chase <drchase@google.com> 1560982179 -0400
committer David Chase <drchase@google.com> 1561049807 +0000

cmd/compile: add necessary operand to mergePoint in rewrite rules

A missing operand to mergePoint caused lower to place values
in the wrong blocks.

Includes test, belt+suspenders to do both ssa check and verify
the output (was is how the bug was originally observed).

The fixed bug here is very likely present in Go versions
1.9-1.12 on amd64 and s390x

Fixes #32680.

Change-Id: I63e702c4c40602cb795ef71b1691eb704d38ccc7
Reviewed-on: https://go-review.googlesource.com/c/go/+/183059
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>