test: make SSA tests unconditional

Delete legacy backend tests, make SSA tests unconditional.

Next CL will remove _ssa from the file names.

Update #16357

Change-Id: I2a7f5dcbc69455f63b5e6e6b2725df26ab86c8dd
Reviewed-on: https://go-review.googlesource.com/29231
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

test/live_ssa.go

-// +build amd64 arm amd64p32 386 arm64 mips64 mips64le s390x
 // errorcheck -0 -l -live -wb=0
 
 // Copyright 2014 The Go Authors. All rights reserved.

test/nilptr3.go

-// errorcheck -0 -d=nil
-// Fails on ppc64x because of incomplete optimization.
-// See issues 9058.
-// Same reason for mips64x and s390x.
-// +build !ppc64,!ppc64le,!mips64,!mips64le,!amd64,!s390x,!arm,!amd64p32,!386,!arm64
-
-// Copyright 2013 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.
-
-// Test that nil checks are removed.
-// Optimization is enabled.
-
-package p
-
-type Struct struct {
-	X int
-	Y float64
-}
-
-type BigStruct struct {
-	X int
-	Y float64
-	A [1 << 20]int
-	Z string
-}
-
-type Empty struct {
-}
-
-type Empty1 struct {
-	Empty
-}
-
-var (
-	intp       *int
-	arrayp     *[10]int
-	array0p    *[0]int
-	bigarrayp  *[1 << 26]int
-	structp    *Struct
-	bigstructp *BigStruct
-	emptyp     *Empty
-	empty1p    *Empty1
-)
-
-func f1() {
-	_ = *intp // ERROR "generated nil check"
-
-	// This one should be removed but the block copy needs
-	// to be turned into its own pseudo-op in order to see
-	// the indirect.
-	_ = *arrayp // ERROR "generated nil check"
-
-	// 0-byte indirect doesn't suffice.
-	// we don't registerize globals, so there are no removed repeated nil checks.
-	_ = *array0p // ERROR "generated nil check"
-	_ = *array0p // ERROR "generated nil check"
-
-	_ = *intp    // ERROR "generated nil check"
-	_ = *arrayp  // ERROR "generated nil check"
-	_ = *structp // ERROR "generated nil check"
-	_ = *emptyp  // ERROR "generated nil check"
-	_ = *arrayp  // ERROR "generated nil check"
-}
-
-func f2() {
-	var (
-		intp       *int
-		arrayp     *[10]int
-		array0p    *[0]int
-		bigarrayp  *[1 << 20]int
-		structp    *Struct
-		bigstructp *BigStruct
-		emptyp     *Empty
-		empty1p    *Empty1
-	)
-
-	_ = *intp       // ERROR "generated nil check"
-	_ = *arrayp     // ERROR "generated nil check"
-	_ = *array0p    // ERROR "generated nil check"
-	_ = *array0p    // ERROR "removed repeated nil check"
-	_ = *intp       // ERROR "removed repeated nil check"
-	_ = *arrayp     // ERROR "removed repeated nil check"
-	_ = *structp    // ERROR "generated nil check"
-	_ = *emptyp     // ERROR "generated nil check"
-	_ = *arrayp     // ERROR "removed repeated nil check"
-	_ = *bigarrayp  // ERROR "generated nil check" ARM removed nil check before indirect!!
-	_ = *bigstructp // ERROR "generated nil check"
-	_ = *empty1p    // ERROR "generated nil check"
-}
-
-func fx10k() *[10000]int
-
-var b bool
-
-func f3(x *[10000]int) {
-	// Using a huge type and huge offsets so the compiler
-	// does not expect the memory hardware to fault.
-	_ = x[9999] // ERROR "generated nil check"
-
-	for {
-		if x[9999] != 0 { // ERROR "generated nil check"
-			break
-		}
-	}
-
-	x = fx10k()
-	_ = x[9999] // ERROR "generated nil check"
-	if b {
-		_ = x[9999] // ERROR "removed repeated nil check"
-	} else {
-		_ = x[9999] // ERROR "removed repeated nil check"
-	}
-	_ = x[9999] // ERROR "generated nil check"
-
-	x = fx10k()
-	if b {
-		_ = x[9999] // ERROR "generated nil check"
-	} else {
-		_ = x[9999] // ERROR "generated nil check"
-	}
-	_ = x[9999] // ERROR "generated nil check"
-
-	fx10k()
-	// This one is a bit redundant, if we figured out that
-	// x wasn't going to change across the function call.
-	// But it's a little complex to do and in practice doesn't
-	// matter enough.
-	_ = x[9999] // ERROR "generated nil check"
-}
-
-func f3a() {
-	x := fx10k()
-	y := fx10k()
-	z := fx10k()
-	_ = &x[9] // ERROR "generated nil check"
-	y = z
-	_ = &x[9] // ERROR "removed repeated nil check"
-	x = y
-	_ = &x[9] // ERROR "generated nil check"
-}
-
-func f3b() {
-	x := fx10k()
-	y := fx10k()
-	_ = &x[9] // ERROR "generated nil check"
-	y = x
-	_ = &x[9] // ERROR "removed repeated nil check"
-	x = y
-	_ = &x[9] // ERROR "removed repeated nil check"
-}
-
-func fx10() *[10]int
-
-func f4(x *[10]int) {
-	// Most of these have no checks because a real memory reference follows,
-	// and the offset is small enough that if x is nil, the address will still be
-	// in the first unmapped page of memory.
-
-	_ = x[9] // ERROR "removed nil check before indirect"
-
-	for {
-		if x[9] != 0 { // ERROR "removed nil check before indirect"
-			break
-		}
-	}
-
-	x = fx10()
-	_ = x[9] // ERROR "removed nil check before indirect"
-	if b {
-		_ = x[9] // ERROR "removed nil check before indirect"
-	} else {
-		_ = x[9] // ERROR "removed nil check before indirect"
-	}
-	_ = x[9] // ERROR "removed nil check before indirect"
-
-	x = fx10()
-	if b {
-		_ = x[9] // ERROR "removed nil check before indirect"
-	} else {
-		_ = &x[9] // ERROR "generated nil check"
-	}
-	_ = x[9] // ERROR "removed nil check before indirect"
-
-	fx10()
-	_ = x[9] // ERROR "removed nil check before indirect"
-
-	x = fx10()
-	y := fx10()
-	_ = &x[9] // ERROR "generated nil check"
-	y = x
-	_ = &x[9] // ERROR "removed repeated nil check"
-	x = y
-	_ = &x[9] // ERROR "removed repeated nil check"
-}
-
-func m1(m map[int][80]byte) byte {
-	v := m[3] // ERROR "removed nil check"
-	return v[5]
-}
-func m2(m map[int][800]byte) byte {
-	v := m[3] // ERROR "removed nil check"
-	return v[5]
-}
-func m3(m map[int][80]byte) (byte, bool) {
-	v, ok := m[3] // ERROR "removed nil check"
-	return v[5], ok
-}
-func m4(m map[int][800]byte) (byte, bool) {
-	v, ok := m[3] // ERROR "removed nil check"
-	return v[5], ok
-}
-func p1() byte {
-	p := new([100]byte)
-	return p[5] // ERROR "removed nil check"
-}
-
-// make sure not to do nil check for access of PAUTOHEAP
-//go:noinline
-func (p *Struct) m() {}
-func c1() {
-	var x Struct
-	func() { x.m() }() // ERROR "removed nil check"
-}

test/nilptr3_ssa.go

 // errorcheck -0 -d=nil
-// +build amd64 arm amd64p32 386 arm64 mips64 mips64le ppc64le s390x
 
 // Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style