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Fix performance regression in NI by fixing totally incorrect hashCode

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The actual problem was introduced in 4f1e85b468, note how `hashCode` is implemented:
```
var currentHashCode = cachedHashCode
if (currentHashCode == 0) return currentHashCode
...
```
It's a silly bug, there should be check `if (currentHashCode != 0) ...` because `0` is used a marker for "uncomputed value".

Now, in the commit 0219b86d06 I added map with `KotlinType` as a key and because of constant `hash` for `KotlinType`, we basically got `List` instead of `Map`, which caused this performance regression

 #KT-34063 Fixed
This commit is contained in:
Mikhail Zarechenskiy
2019-09-30 02:04:39 +03:00
parent 957af741cd
commit 932d84d568
8 changed files with 212 additions and 7 deletions
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compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/41.kt
Vendored
+1 -1
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@@ -19,7 +19,7 @@ fun case_1(x: Any) {
if (x is Interface1) {
if (x is Interface2) {
<!DEBUG_INFO_EXPRESSION_TYPE("Interface1 & Interface2 & kotlin.Any")!>x<!>
<!DEBUG_INFO_EXPRESSION_TYPE("Interface1 & kotlin.Any"), DEBUG_INFO_SMARTCAST!>x<!>.itest()
<!DEBUG_INFO_EXPRESSION_TYPE("Interface2 & kotlin.Any"), DEBUG_INFO_SMARTCAST!>x<!>.itest()
<!DEBUG_INFO_EXPRESSION_TYPE("Interface1 & kotlin.Any"), DEBUG_INFO_SMARTCAST!>x<!>.itest1()
<!DEBUG_INFO_EXPRESSION_TYPE("Interface2 & kotlin.Any"), DEBUG_INFO_SMARTCAST!>x<!>.itest2()
}