Capitalize/decapitalize only ASCII characters across project

Use {de,}capitalizeAsciiOnly and to{Lower,Upper}CaseAsciiOnly where
possible, and stdlib's functions with Locale.US everywhere else.

Otherwise, if the default system locale is Turkish, the capital latin
letter "I" is transformed in toLowerCase to "ı" (see
https://github.com/JetBrains/kotlin/blob/66bc142f92085047a1ca64f9a291f0496e33dd98/libraries/stdlib/jvm/test/text/StringJVMTest.kt#L119),
which for example breaks the codegen for `intArrayOf` in
KT-25400/KT-43405.

Similarly, lower case latin letter "i" is transformed to "İ".

 #KT-13631 Fixed
 #KT-25400 Fixed
 #KT-43405 Fixed

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/Utils.kt

@@ -7,18 +7,22 @@ package org.jetbrains.kotlin.ir.interpreter
 
 import org.jetbrains.kotlin.builtins.StandardNames
 import org.jetbrains.kotlin.descriptors.ClassKind
-import org.jetbrains.kotlin.ir.interpreter.builtins.evaluateIntrinsicAnnotation
-import org.jetbrains.kotlin.ir.interpreter.stack.Variable
-import org.jetbrains.kotlin.ir.interpreter.state.*
 import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.expressions.impl.IrConstImpl
-import org.jetbrains.kotlin.ir.symbols.*
+import org.jetbrains.kotlin.ir.interpreter.builtins.evaluateIntrinsicAnnotation
+import org.jetbrains.kotlin.ir.interpreter.stack.Variable
+import org.jetbrains.kotlin.ir.interpreter.state.*
+import org.jetbrains.kotlin.ir.symbols.IrFieldSymbol
+import org.jetbrains.kotlin.ir.symbols.IrSymbol
+import org.jetbrains.kotlin.ir.symbols.IrTypeParameterSymbol
+import org.jetbrains.kotlin.ir.symbols.IrValueParameterSymbol
 import org.jetbrains.kotlin.ir.types.*
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.util.capitalizeDecapitalize.capitalizeAsciiOnly
 import org.jetbrains.kotlin.utils.addToStdlib.safeAs
 
 internal fun IrFunction.getDispatchReceiver(): IrValueParameterSymbol? = this.dispatchReceiverParameter?.symbol
@@ -202,7 +206,7 @@ internal fun State?.getCorrectReceiverByFunction(irFunction: IrFunction): State?
     return generateSequence(original) { it.superClass }.firstOrNull { it.irClass.thisReceiver == other } ?: this
 }
 
-internal fun IrFunction.getCapitalizedFileName() = this.file.name.replace(".kt", "Kt").capitalize()
+internal fun IrFunction.getCapitalizedFileName() = this.file.name.replace(".kt", "Kt").capitalizeAsciiOnly()
 
 internal fun IrType.isUnsigned() = this.isUByte() || this.isUShort() || this.isUInt() || this.isULong()
 

compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/state/Wrapper.kt

@@ -17,6 +17,7 @@ import org.jetbrains.kotlin.ir.util.defaultType
 import org.jetbrains.kotlin.ir.util.fqNameForIrSerialization
 import org.jetbrains.kotlin.ir.util.fqNameWhenAvailable
 import org.jetbrains.kotlin.ir.util.parentAsClass
+import org.jetbrains.kotlin.util.capitalizeDecapitalize.capitalizeAsciiOnly
 import java.lang.invoke.MethodHandle
 import java.lang.invoke.MethodHandles
 import java.lang.invoke.MethodType
@@ -30,7 +31,7 @@ internal class Wrapper(val value: Any, override val irClass: IrClass) : Complex(
         if (irFunction.getEvaluateIntrinsicValue()?.isEmpty() == true) return null // this method will handle IntrinsicEvaluator
         // if function is actually a getter, then use "get${property.name.capitalize()}" as method name
         val propertyName = (irFunction as? IrSimpleFunction)?.correspondingPropertySymbol?.owner?.name?.asString()
-        val propertyCall = listOfNotNull(propertyName, "get${propertyName?.capitalize()}")
+        val propertyCall = listOfNotNull(propertyName, "get${propertyName?.capitalizeAsciiOnly()}")
             .firstOrNull { receiverClass.methods.any { method -> method.name == it } }
 
         val intrinsicName = getJavaOriginalName(irFunction)
@@ -187,4 +188,4 @@ internal class Wrapper(val value: Any, override val irClass: IrClass) : Complex(
     override fun toString(): String {
         return "Wrapper(obj='$typeFqName', value=$value)"
     }
-}
+}