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Implementation of exhaustive whens in control flow analysis.

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Now control flow analyzer knows when is exhaustive.
If despite of this all conditions are accidentally false, jump to error is generated.
A set of tests (diagnostic, control flow). #KT-5113 Fixed. #KT-6046 Fixed. #KT-1882 Fixed.
This commit is contained in:
Mikhail Glukhikh
2015-05-12 19:20:31 +03:00
parent c4aa6d01a9
commit 0d7f649cc2
16 changed files with 367 additions and 1 deletions
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compiler/testData/cfg/controlStructures/whenExhaustive.values
+21
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@@ -0,0 +1,21 @@
== foo ==
fun foo(flag: Boolean): Int {
when (flag) {
true -> return 1
false -> return 0
}
}
---------------------
<v0>: Boolean NEW: magic[FAKE_INITIALIZER](flag: Boolean) -> <v0>
flag <v1>: * NEW: r(flag) -> <v1>
true <v2>: * NEW: r(true) -> <v2>
true <v3>: * NEW: magic[EQUALS_IN_WHEN_CONDITION](true|<v1>, <v2>) -> <v3>
1 <v4>: Int NEW: r(1) -> <v4>
return 1 !<v8>: *
false <v5>: * NEW: r(false) -> <v5>
false <v6>: * NEW: magic[EQUALS_IN_WHEN_CONDITION](false|<v1>, <v5>) -> <v6>
0 <v7>: Int NEW: r(0) -> <v7>
return 0 !<v9>: *
when (flag) { true -> return 1 false -> return 0 } <v10>: * NEW: merge(when (flag) { true -> return 1 false -> return 0 }|!<v8>, !<v9>) -> <v10>
{ when (flag) { true -> return 1 false -> return 0 } } <v10>: * COPY
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