Refined redundant null check optimization

2014-12-31 16:19:21 +03:00
parent 5675d2b26b
commit 6f94ebb9d6
10 changed files with 139 additions and 5 deletions
@@ -0,0 +1,8 @@
+fun box() {
+    val x = Array(1) { "" }
+}
+
+// 0 IFNULL
+// 0 IFNONNULL
+// 0 ATHROW
+// 0 throwNpe
@@ -1,3 +1,5 @@
+class A
+
 fun foo(x: Any?) {}

 fun box() {
@@ -8,6 +10,9 @@ fun box() {
    z!!

    foo(1 as java.lang.Integer)
+    
+    val y: Any? = if (1 == 1) x else A()
+    y!!
 }

 // 0 IFNULL
@@ -0,0 +1,12 @@
+fun box() {
+    val x: Any? = "abc"
+    val y: Any? = if (1 == 1) x else "cde"
+    
+    x!!
+    y!!
+}
+
+// 0 IFNULL
+// 0 IFNONNULL
+// 0 throwNpe
+// 0 ATHROW
@@ -0,0 +1,15 @@
+class A
+fun box() {
+    val x: A? = A()
+    val z: A? = A()
+    val z1: A? = if (1 == 1) z else x
+    
+    x!!
+    z!!
+    z1!!
+}
+
+// 0 IFNULL
+// 0 IFNONNULL
+// 0 throwNpe
+// 0 ATHROW
@@ -0,0 +1,18 @@
+class A
+fun box() {
+    val x: A? = A()
+    val y: A?
+    if (1 == 0) {
+        y = x
+    }
+    else {
+        y = null
+    }
+    
+    y!!
+}
+
+// 0 IFNULL
+// 1 IFNONNULL
+// 1 throwNpe
+// 0 ATHROW