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More precise value reassignment analysis. #KT-7418 Fixed. #KT-6902 Fixed.

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Variable can now be "exactly initialized", "may be initialized" and "not initialized".
A set of relevant tests. Some fixed tests.
This commit is contained in:
Mikhail Glukhikh
2015-09-01 19:16:27 +03:00
parent c59b118b09
commit 285d5d06c7
26 changed files with 269 additions and 53 deletions
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compiler/testData/cfg-variables/basic/IfWithUninitialized.instructions
Vendored
+8 -8
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@@ -10,7 +10,7 @@ fun foo() {
}
---------------------
L0:
1 <START> INIT: in: {} out: {} USE: in: {} out: {}
1 <START> INIT: in: {} out: {} USE: in: {} out: {}
2 mark({ val b: Boolean if (1 < 2) { use(b) } else { b = true } })
v(val b: Boolean) INIT: in: {} out: {b=D}
mark(if (1 < 2) { use(b) } else { b = true }) INIT: in: {b=D} out: {b=D}
@@ -19,23 +19,23 @@ L0:
mark(1 < 2)
call(1 < 2, compareTo|<v0>, <v1>) -> <v2>
jf(L2|<v2>)
3 mark({ use(b) }) USE: in: {b=READ} out: {b=READ}
r(b) -> <v3> USE: in: {} out: {b=READ}
3 mark({ use(b) }) USE: in: {b=READ} out: {b=READ}
r(b) -> <v3> USE: in: {} out: {b=READ}
mark(use(b))
call(use(b), use|<v3>) -> <v4>
2 jmp(L3) USE: in: {} out: {}
2 jmp(L3) USE: in: {} out: {}
L2 [else branch]:
3 mark({ b = true })
r(true) -> <v5> USE: in: {b=ONLY_WRITTEN_NEVER_READ} out: {b=ONLY_WRITTEN_NEVER_READ}
w(b|<v5>) INIT: in: {b=D} out: {b=ID} USE: in: {} out: {b=ONLY_WRITTEN_NEVER_READ}
r(true) -> <v5> USE: in: {b=ONLY_WRITTEN_NEVER_READ} out: {b=ONLY_WRITTEN_NEVER_READ}
w(b|<v5>) INIT: in: {b=D} out: {b=ID} USE: in: {} out: {b=ONLY_WRITTEN_NEVER_READ}
L3 ['if' expression result]:
2 merge(if (1 < 2) { use(b) } else { b = true }|<v4>, !<v6>) -> <v7> INIT: in: {b=D} out: {b=D}
2 merge(if (1 < 2) { use(b) } else { b = true }|<v4>, !<v6>) -> <v7> INIT: in: {b=I?D} out: {b=I?D}
L1:
1 <END> INIT: in: {} out: {}
error:
<ERROR>
sink:
<SINK> USE: in: {} out: {}
<SINK> USE: in: {} out: {}
=====================
== use ==
fun use(vararg a: Any?) = a