1 files changed, 41 insertions, 0 deletions
diff --git a/test/fixedbugs/issue66066.go b/test/fixedbugs/issue66066.go
new file mode 100644
index 0000000000..a674503b47
--- /dev/null
+++ b/test/fixedbugs/issue66066.go
@@ -0,0 +1,41 @@
+// run
+
+// Copyright 2024 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
+
+import "fmt"
+
+func main() {
+	testMod()
+	testMul()
+}
+
+//go:noinline
+func mod3(x uint32) uint64 {
+	return uint64(x % 3)
+}
+
+func testMod() {
+	got := mod3(1<<32 - 1)
+	want := uint64((1<<32 - 1) % 3)
+	if got != want {
+		fmt.Printf("testMod: got %x want %x\n", got, want)
+	}
+
+}
+
+//go:noinline
+func mul3(a uint32) uint64 {
+	return uint64(a * 3)
+}
+
+func testMul() {
+	got := mul3(1<<32 - 1)
+	want := uint64((1<<32-1)*3 - 2<<32)
+	if got != want {
+		fmt.Printf("testMul: got %x want %x\n", got, want)
+	}
+}