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1ed30ca537
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. Should fix #51101. 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>
37 lines
523 B
Go
37 lines
523 B
Go
// run
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// Copyright 2022 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Issue 51101: on RISCV64, difference of two pointers
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// was marked as pointer and crashes GC.
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package main
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var a, b int
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func main() {
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F(&b, &a)
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}
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//go:noinline
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func F(a, b *int) bool {
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x := a == b
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G(x)
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y := a != b
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return y
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}
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//go:noinline
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func G(bool) {
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grow([1000]int{20})
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}
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func grow(x [1000]int) {
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if x[0] != 0 {
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x[0]--
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grow(x)
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}
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}
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