go source for verification 2026-05-22

test/nilptr5.go

@@ -0,0 +1,38 @@
+// errorcheck -0 -d=nil
+
+//go:build !wasm && !aix
+
+// 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.
+
+// Test that nil checks are removed.
+// Optimization is enabled.
+
+package p
+
+func f5(p *float32, q *float64, r *float32, s *float64) float64 {
+	x := float64(*p) // ERROR "removed nil check"
+	y := *q          // ERROR "removed nil check"
+	*r = 7           // ERROR "removed nil check"
+	*s = 9           // ERROR "removed nil check"
+	return x + y
+}
+
+type T struct{ b [29]byte }
+
+func f6(p, q *T) {
+	x := *p // ERROR "removed nil check"
+	*q = x  // ERROR "removed nil check"
+}
+
+// make sure to remove nil check for memory move (issue #18003)
+func f8(t *struct{ b [8]int }) struct{ b [8]int } {
+	return *t // ERROR "removed nil check"
+}
+
+// nil check is removed for pointer write (which involves a
+// write barrier).
+func f9(x **int, y *int) {
+	*x = y // ERROR "removed nil check"
+}