go/test/fixedbugs/issue26163.go

// compile -N -d=softfloat

// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Issue 26163: dead store generated in late opt messes
// up store chain calculation.

package p

var i int
var A = ([]*int{})[i]

var F func(float64, complex128) int
var C chan complex128
var B = F(1, 1+(<-C))
[dev.typeparams] cmd/compile: make softfloat mode work with register ABI Previously, softfloat mode does not work with register ABI, mainly because the compiler doesn't know how to pass floating point arguments and results. According to the ABI it should be passed in FP registers, but there isn't any in softfloat mode. This CL makes it work. When softfloat is used, we define the ABI as having 0 floating point registers (because there aren't any). The integer registers are unchanged. So floating point arguments and results are passed in memory. Another option is to pass (the bit representation of) floating point values in integer registers. But this complicates things because it'd need to reorder integer argument registers. Change-Id: Ibecbeccb658c10a868fa7f2dcf75138f719cc809 Reviewed-on: https://go-review.googlesource.com/c/go/+/327274 Trust: Cherry Mui <cherryyz@google.com> Run-TryBot: Cherry Mui <cherryyz@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com> 2021-06-09 20:14:15 -04:00			`// compile -N -d=softfloat`
cmd/compile: run generic deadcode in -N mode Late opt pass may generate dead stores, which messes up store chain calculation in later passes. Run generic deadcode even in -N mode to remove them. Fixes #26163. Change-Id: I8276101717bb978d5980e6c7998f53fd8d0ae10f Reviewed-on: https://go-review.googlesource.com/121856 Run-TryBot: Cherry Zhang <cherryyz@google.com> Reviewed-by: Keith Randall <khr@golang.org> 2018-06-30 17:46:25 -04:00
			`// Copyright 2018 The Go Authors. All rights reserved.`
			`// Use of this source code is governed by a BSD-style`
			`// license that can be found in the LICENSE file.`

			`// Issue 26163: dead store generated in late opt messes`
			`// up store chain calculation.`

			`package p`

			`var i int`
			`var A = ([]*int{})[i]`

			`var F func(float64, complex128) int`
			`var C chan complex128`
			`var B = F(1, 1+(<-C))`