Run inlining phase against whole module

It is wrong to run inlining phase file by file, because other lowerings
could modify inline function before it had been inlined.

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanLower.kt

@@ -21,21 +21,32 @@ import org.jetbrains.kotlin.backend.common.lower.*
 import org.jetbrains.kotlin.backend.common.validateIrFile
 import org.jetbrains.kotlin.backend.konan.lower.*
 import org.jetbrains.kotlin.ir.declarations.IrFile
+import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 
 internal class KonanLower(val context: Context) {
 
     fun lower() {
+        // Phases to run against whole module.
+        lowerModule(context.irModule!!)
+
+        // Phases to run against a file.
         context.irModule!!.files.forEach {
-            lower(it)
+            lowerFile(it)
         }
     }
 
-    fun lower(irFile: IrFile) {
+    fun lowerModule(irModule: IrModuleFragment) {
         val phaser = PhaseManager(context)
 
+        // Inlining must be run before other phases.
         phaser.phase(KonanPhase.LOWER_INLINE) {
-            FunctionInlining(context).inline(irFile)
+            FunctionInlining(context).inline(irModule)
         }
+    }
+
+    fun lowerFile(irFile: IrFile) {
+        val phaser = PhaseManager(context)
+
         phaser.phase(KonanPhase.LOWER_STRING_CONCAT) {
             StringConcatenationLowering(context).lower(irFile)
         }

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/FunctionInlining.kt

@@ -24,10 +24,7 @@ import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.builders.Scope
-import org.jetbrains.kotlin.ir.declarations.IrFile
-import org.jetbrains.kotlin.ir.declarations.IrFunction
-import org.jetbrains.kotlin.ir.declarations.IrProperty
-import org.jetbrains.kotlin.ir.declarations.IrVariable
+import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.expressions.impl.*
 import org.jetbrains.kotlin.ir.util.DeepCopyIrTree
@@ -48,7 +45,7 @@ internal class FunctionInlining(val context: Context): IrElementTransformerVoid(
     //-------------------------------------------------------------------------//
     private val deserializer = DeserializerDriver(context)
 
-    fun inline(irFile: IrFile) = irFile.accept(this, null)
+    fun inline(irModule: IrModuleFragment) = irModule.accept(this, null)
 
     //-------------------------------------------------------------------------//