Proper instructions for elvis operator

We should not mark elvis operator unused, for the rhs may have desired side-effects
2013-12-05 12:51:18 +04:00
parent 3629a539e4
commit 4ca90e9c68
8 changed files with 50 additions and 2 deletions
@@ -9,6 +9,7 @@ L0:
    ret L1                      NEXT:[<END>]
 -   jt(L2)                      NEXT:[r(null), <END>]              PREV:[]
 -   r(null)                     PREV:[]
+-   r(return ?: null)           PREV:[]
 L1:
 L2:
    <END>                       NEXT:[<SINK>]                      PREV:[ret L1]
@@ -0,0 +1,23 @@
+== test ==
+fun test(a: Any?) {
+    a ?: ""
+}
+---------------------
+L0:
+    <START>
+    v(a: Any?)
+    w(a)
+    mark({ a ?: "" })
+    r(a)
+    jt(L2)               NEXT:[mark(""), <END>]
+    mark("")
+    r("")
+    r(a ?: "")
+L1:
+L2:
+    <END>                NEXT:[<SINK>]               PREV:[jt(L2), r(a ?: "")]
+error:
+    <ERROR>              PREV:[]
+sink:
+    <SINK>               PREV:[<ERROR>, <END>]
+=====================
@@ -0,0 +1,3 @@
+fun test(a: Any?) {
+    a ?: ""
+}