tree 9deb0a98d4d79bc07fa733f07463a6a11d40df95
parent 8a24f67ca73fc275646d768c66566af064f7ae09
author Cherry Mui <cherryyz@google.com> 1644860607 -0500
committer Dmitri Shuralyov <dmitshur@golang.org> 1645145475 +0000

[release-branch.go1.16] cmd/compile: correct type of pointer difference on RISCV64

Pointer comparison is lowered to the following on RISCV64

(EqPtr x y) => (SEQZ (SUB <x.Type> x y))

The difference of two pointers (the SUB) should not be pointer
type. Otherwise it can cause the GC to find a bad pointer.

Updates #51101.
Fixes #51198.

Change-Id: I7e73c2155c36ff403c032981a9aa9cccbfdf0f64
Reviewed-on: https://go-review.googlesource.com/c/go/+/385655
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
(cherry picked from commit 1ed30ca537a05b887f8479027b6363a03f957610)
Reviewed-on: https://go-review.googlesource.com/c/go/+/386475