diff --git a/test/codegen/bitfield.go b/test/codegen/bitfield.go
index d4ffbad85d..3ed9cfe603 100644
--- a/test/codegen/bitfield.go
+++ b/test/codegen/bitfield.go
@@ -99,10 +99,6 @@ func sbfiz5(x int32) int32 {
 	return (x << 4) >> 3
 }
 
-func sbfiz5(x int32) int64 {
-	return int64(x+1) << 40 // arm64:"SBFIZ\t[$]40, R[0-9]+, [$]24",-"LSL"
-}
-
 func sbfiz6(x int16) int64 {
 	return int64(x+1) << 3 // arm64:"SBFIZ\t[$]3, R[0-9]+, [$]16",-"LSL"
 }
@@ -111,6 +107,10 @@ func sbfiz7(x int8) int64 {
 	return int64(x+1) << 62 // arm64:"SBFIZ\t[$]62, R[0-9]+, [$]2",-"LSL"
 }
 
+func sbfiz8(x int32) int64 {
+	return int64(x+1) << 40 // arm64:"SBFIZ\t[$]40, R[0-9]+, [$]24",-"LSL"
+}
+
 // sbfx
 func sbfx1(x int64) int64 {
 	return (x << 3) >> 4 // arm64:"SBFX\t[$]1, R[0-9]+, [$]60",-"LSL",-"ASR"