cmd/compile: internal compiler error: panic during lower in linux/loong64

[ALTree]

$ gotip version
go version devel go1.19-69b412b7d6 Fri May 20 19:01:40 2022 +0000 linux/amd64

package p

var V []int

func f(i int, c chan int) int {
	arr := []int{0, 1}
	for range c {
		for a2 := range arr {
			var a []int
			V = V[:1/a2]
			a[i] = 0
		}
		return func() int {
			arr = []int{}
			return func() int {
				return func() int {
					return func() int { return 4 }()
				}()
			}()
		}()
	}

	return 0
}

$ GOARCH=loong64 gotip tool compile crash.go

crash.go:7:6: internal compiler error: 'f': panic during lower while compiling f:

runtime error: integer divide by zero

goroutine 1 [running]:
cmd/compile/internal/ssa.Compile.func1()
	/home/alberto/gotip/src/cmd/compile/internal/ssa/compile.go:50 +0x71
panic({0xcc28e0, 0x133b7b0})
	/home/alberto/gotip/src/runtime/panic.go:884 +0x212
cmd/compile/internal/ssa.rewriteValueLOONG64_OpSelect1(0xc0004819d0)
	/home/alberto/gotip/src/cmd/compile/internal/ssa/rewriteLOONG64.go:7060 +0x6cd
cmd/compile/internal/ssa.rewriteValueLOONG64(0xc0004b7940?)
	/home/alberto/gotip/src/cmd/compile/internal/ssa/rewriteLOONG64.go:573 +0x1e71
cmd/compile/internal/ssa.applyRewrite(0xc0004028c0, 0xd67b50, 0xd67bd0, 0x1)
	/home/alberto/gotip/src/cmd/compile/internal/ssa/rewrite.go:133 +0xfd6
cmd/compile/internal/ssa.lower(0xc0004028c0?)
	/home/alberto/gotip/src/cmd/compile/internal/ssa/lower.go:10 +0x2f
cmd/compile/internal/ssa.Compile(0xc0004028c0)
	/home/alberto/gotip/src/cmd/compile/internal/ssa/compile.go:98 +0x9be

...

cc @XiaodongLoong

[XiaodongLoong]

Thanks!

CC @golang/loong64

[gopherbot]

Change https://go.dev/cl/407655 mentions this issue: cmd/compile: fix loong64 constant folding in signed division