Initial commit: Go 1.23 release state

test/phiopt.go

@@ -0,0 +1,133 @@
+// errorcheck -0 -d=ssa/phiopt/debug=3
+
+//go:build amd64 || s390x || arm64
+
+// Copyright 2016 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.
+
+package main
+
+//go:noinline
+func f0(a bool) bool {
+	x := false
+	if a {
+		x = true
+	} else {
+		x = false
+	}
+	return x // ERROR "converted OpPhi to Copy$"
+}
+
+//go:noinline
+func f1(a bool) bool {
+	x := false
+	if a {
+		x = false
+	} else {
+		x = true
+	}
+	return x // ERROR "converted OpPhi to Not$"
+}
+
+//go:noinline
+func f2(a, b int) bool {
+	x := true
+	if a == b {
+		x = false
+	}
+	return x // ERROR "converted OpPhi to Not$"
+}
+
+//go:noinline
+func f3(a, b int) bool {
+	x := false
+	if a == b {
+		x = true
+	}
+	return x // ERROR "converted OpPhi to Copy$"
+}
+
+//go:noinline
+func f4(a, b bool) bool {
+	return a || b // ERROR "converted OpPhi to OrB$"
+}
+
+//go:noinline
+func f5or(a int, b bool) bool {
+	var x bool
+	if a == 0 {
+		x = true
+	} else {
+		x = b
+	}
+	return x // ERROR "converted OpPhi to OrB$"
+}
+
+//go:noinline
+func f5and(a int, b bool) bool {
+	var x bool
+	if a == 0 {
+		x = b
+	} else {
+		x = false
+	}
+	return x // ERROR "converted OpPhi to AndB$"
+}
+
+//go:noinline
+func f6or(a int, b bool) bool {
+	x := b
+	if a == 0 {
+		// f6or has side effects so the OpPhi should not be converted.
+		x = f6or(a, b)
+	}
+	return x
+}
+
+//go:noinline
+func f6and(a int, b bool) bool {
+	x := b
+	if a == 0 {
+		// f6and has side effects so the OpPhi should not be converted.
+		x = f6and(a, b)
+	}
+	return x
+}
+
+//go:noinline
+func f7or(a bool, b bool) bool {
+	return a || b // ERROR "converted OpPhi to OrB$"
+}
+
+//go:noinline
+func f7and(a bool, b bool) bool {
+	return a && b // ERROR "converted OpPhi to AndB$"
+}
+
+//go:noinline
+func f8(s string) (string, bool) {
+	neg := false
+	if s[0] == '-' {    // ERROR "converted OpPhi to Copy$"
+		neg = true
+		s = s[1:]
+	}
+	return s, neg
+}
+
+var d int
+
+//go:noinline
+func f9(a, b int) bool {
+	c := false
+	if a < 0 {          // ERROR "converted OpPhi to Copy$"
+		if b < 0 {
+			d = d + 1
+		}
+		c = true
+	}
+	return c
+}
+
+func main() {
+}