JVM_IR. Combine all inline function resolve logic in ResolveInlineCalls lower

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmLower.kt

@@ -286,7 +286,6 @@ private val jvmFilePhases =
         additionalClassAnnotationPhase then
         typeOperatorLowering then
         replaceKFunctionInvokeWithFunctionInvokePhase then
-        resolveInlineCallsPhase then
 
         checkLocalNamesWithOldBackendPhase then
 
@@ -302,6 +301,7 @@ val jvmPhases = namedIrModulePhase(
             fileClassPhase then
             performByIrFile(lower = jvmFilePhases) then
             generateMultifileFacadesPhase then
+            resolveInlineCallsPhase then
             // should be last transformation
             removeDeclarationsThatWouldBeInlined then
             validateIrAfterLowering

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ExpressionCodegen.kt

@@ -948,14 +948,6 @@ class ExpressionCodegen(
         }
     }
 
-    private fun IrFunction.resolveMultiFileFacades(): IrFunction {
-        //TODO: move to ResolveInlineCalls lower (now it's goes before generateMultifileFacadesPhase)
-        return if (origin == JvmLoweredDeclarationOrigin.MULTIFILE_BRIDGE) {
-            context.multifileFacadeMemberToPartMember[this]?.let { return it }
-            error("Function from a multi-file facade without the link to the function in the part: ${this.render()}")
-        } else this
-    }
-
     private fun getOrCreateCallGenerator(
         element: IrFunctionAccessExpression, data: BlockInfo, signature: JvmMethodSignature
     ): IrCallGenerator {
@@ -965,7 +957,7 @@ class ExpressionCodegen(
             return IrCallGenerator.DefaultCallGenerator
         }
 
-        val callee = element.symbol.owner.resolveMultiFileFacades()
+        val callee = element.symbol.owner
         val typeArgumentContainer = if (callee is IrConstructor) callee.parentAsClass else callee
         val typeArguments =
             if (element.typeArgumentsCount == 0) {

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/IrSourceCompilerForInline.kt

@@ -8,7 +8,6 @@ package org.jetbrains.kotlin.backend.jvm.codegen
 import com.intellij.psi.PsiElement
 import com.intellij.psi.PsiFile
 import org.jetbrains.kotlin.backend.common.ir.ir2string
-import org.jetbrains.kotlin.backend.jvm.lower.MultifileFacadeFileEntry
 import org.jetbrains.kotlin.codegen.BaseExpressionCodegen
 import org.jetbrains.kotlin.codegen.ClassBuilder
 import org.jetbrains.kotlin.codegen.OwnerKind
@@ -23,9 +22,6 @@ import org.jetbrains.kotlin.incremental.components.NoLookupLocation
 import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.expressions.IrMemberAccessExpression
-import org.jetbrains.kotlin.ir.util.isSuspend
-import org.jetbrains.kotlin.ir.util.parentAsClass
-import org.jetbrains.kotlin.ir.util.render
 import org.jetbrains.kotlin.resolve.DescriptorUtils
 import org.jetbrains.kotlin.resolve.jvm.diagnostics.JvmDeclarationOrigin
 import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodGenericSignature
@@ -95,28 +91,7 @@ class IrSourceCompilerForInline(
         asmMethod: Method
     ): SMAPAndMethodNode {
         assert(callableDescriptor == callee.symbol.descriptor.original) { "Expected $callableDescriptor got ${callee.descriptor.original}" }
-        val irFunction = getFunctionToInline()
-        return makeInlineNode(irFunction, FakeClassCodegen(irFunction, codegen.classCodegen), false)
-    }
-
-    private fun getFunctionToInline(): IrFunction {
-        val parent = callee.parentAsClass
-
-        if (parent.fileParent.fileEntry is MultifileFacadeFileEntry) {
-            codegen.context.multifileFacadeMemberToPartMember[callee]?.let { return it }
-
-            if (callee.isSuspend) {
-                codegen.context.suspendFunctionViewToOriginal[callee]?.let { facadeMemberOriginal ->
-                    codegen.context.multifileFacadeMemberToPartMember[facadeMemberOriginal]?.let { partMemberOriginal ->
-                        return partMemberOriginal.getOrCreateSuspendFunctionViewIfNeeded(codegen.context)
-                    }
-                }
-            }
-
-            error("Function from a multi-file facade without the link to the function in the part: ${callee.render()}")
-        }
-
-        return callee
+        return makeInlineNode(callee, FakeClassCodegen(callee, codegen.classCodegen), false)
     }
 
     override fun hasFinallyBlocks() = data.hasFinallyBlocks()

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/ResolveInlineCalls.kt

@@ -6,10 +6,12 @@
 package org.jetbrains.kotlin.backend.jvm.lower
 
 import org.jetbrains.kotlin.backend.common.FileLoweringPass
-import org.jetbrains.kotlin.backend.common.phaser.makeIrFilePhase
+import org.jetbrains.kotlin.backend.common.phaser.makeIrModulePhase
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
+import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
 import org.jetbrains.kotlin.backend.jvm.codegen.isInlineFunctionCall
 import org.jetbrains.kotlin.ir.declarations.IrFile
+import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
 import org.jetbrains.kotlin.ir.expressions.IrCall
 import org.jetbrains.kotlin.ir.expressions.IrExpression
@@ -19,7 +21,7 @@ import org.jetbrains.kotlin.ir.util.resolveFakeOverride
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 
 @Suppress("RemoveExplicitTypeArguments")
-internal val resolveInlineCallsPhase = makeIrFilePhase<JvmBackendContext>(
+internal val resolveInlineCallsPhase = makeIrModulePhase(
     ::ResolveInlineCalls,
     name = "ResolveInlineCalls",
     description = "Statically resolve calls to inline methods to particular implementations"
@@ -31,9 +33,10 @@ class ResolveInlineCalls(val context: JvmBackendContext) : IrElementTransformerV
     override fun visitCall(expression: IrCall): IrExpression {
         if (!expression.symbol.owner.isInlineFunctionCall(context))
             return super.visitCall(expression)
-        val maybeFakeOverride = expression.symbol.owner as? IrSimpleFunction
+        val maybeFakeOverrideOfMultiFileBridge = expression.symbol.owner as? IrSimpleFunction
             ?: return super.visitCall(expression)
-        val resolved = maybeFakeOverride.resolveFakeOverride()
+        val resolved =
+            maybeFakeOverrideOfMultiFileBridge?.resolveMultiFileFacades() ?: maybeFakeOverrideOfMultiFileBridge.resolveFakeOverride()
             ?: return super.visitCall(expression)
         return super.visitCall(with(expression) {
             IrCallImpl(startOffset, endOffset, type, resolved.symbol, expression.typeArgumentsCount, null, superQualifierSymbol).apply {
@@ -41,4 +44,10 @@ class ResolveInlineCalls(val context: JvmBackendContext) : IrElementTransformerV
             }
         })
     }
+
+    private fun IrFunction.resolveMultiFileFacades(): IrFunction? {
+        return if (origin == JvmLoweredDeclarationOrigin.MULTIFILE_BRIDGE) {
+            context.multifileFacadeMemberToPartMember[this]
+        } else null
+    }
 }