JVM: do not write trivial SMAPs to classes outside inline funs

where trivial == those that map the file to itself.

compiler/backend/src/org/jetbrains/kotlin/codegen/ClosureCodegen.java

@@ -54,7 +54,6 @@ import static org.jetbrains.kotlin.codegen.AsmUtil.*;
 import static org.jetbrains.kotlin.codegen.CallableReferenceUtilKt.*;
 import static org.jetbrains.kotlin.codegen.JvmCodegenUtil.isConst;
 import static org.jetbrains.kotlin.codegen.binding.CodegenBinding.CLOSURE;
-import static org.jetbrains.kotlin.codegen.inline.InlineCodegenUtilsKt.initDefaultSourceMappingIfNeeded;
 import static org.jetbrains.kotlin.codegen.serialization.JvmSerializationBindings.METHOD_FOR_FUNCTION;
 import static org.jetbrains.kotlin.resolve.jvm.AsmTypes.*;
 import static org.jetbrains.kotlin.resolve.jvm.diagnostics.JvmDeclarationOrigin.NO_ORIGIN;
@@ -170,7 +169,7 @@ public class ClosureCodegen extends MemberCodegen<KtElement> {
                 superInterfaceAsmTypes
         );
 
-        initDefaultSourceMappingIfNeeded(context, this, state);
+        initDefaultSourceMappingIfNeeded();
 
         v.visitSource(element.getContainingFile().getName(), null);
     }

compiler/backend/src/org/jetbrains/kotlin/codegen/ImplementationBodyCodegen.java

@@ -68,7 +68,6 @@ import static org.jetbrains.kotlin.codegen.CodegenUtilKt.isNonGenericToArray;
 import static org.jetbrains.kotlin.codegen.JvmCodegenUtil.*;
 import static org.jetbrains.kotlin.codegen.binding.CodegenBinding.enumEntryNeedSubclass;
 import static org.jetbrains.kotlin.codegen.binding.CodegenBinding.getDelegatedLocalVariableMetadata;
-import static org.jetbrains.kotlin.codegen.inline.InlineCodegenUtilsKt.initDefaultSourceMappingIfNeeded;
 import static org.jetbrains.kotlin.load.java.JvmAbi.*;
 import static org.jetbrains.kotlin.resolve.BindingContext.INDEXED_LVALUE_GET;
 import static org.jetbrains.kotlin.resolve.BindingContext.INDEXED_LVALUE_SET;
@@ -228,7 +227,7 @@ public class ImplementationBodyCodegen extends ClassBodyCodegen {
 
         v.visitSource(myClass.getContainingKtFile().getName(), null);
 
-        initDefaultSourceMappingIfNeeded(context, this, state);
+        initDefaultSourceMappingIfNeeded();
 
         writeEnclosingMethod();
 

compiler/backend/src/org/jetbrains/kotlin/codegen/MemberCodegen.java

@@ -88,6 +88,7 @@ public abstract class MemberCodegen<T extends KtPureElement/* TODO: & KtDeclarat
     private NameGenerator inlineNameGenerator;
     private boolean jvmAssertFieldGenerated;
 
+    private boolean alwaysWriteSourceMap;
     private SourceMapper sourceMapper;
 
     public MemberCodegen(
@@ -182,8 +183,8 @@ public abstract class MemberCodegen<T extends KtPureElement/* TODO: & KtDeclarat
 
         writeInnerClasses();
 
-        if (sourceMapper != null) {
-            v.visitSMAP(sourceMapper, !state.getLanguageVersionSettings().supportsFeature(LanguageFeature.CorrectSourceMappingSyntax));
+        if (alwaysWriteSourceMap || (sourceMapper != null && !sourceMapper.isTrivial())) {
+            v.visitSMAP(getOrCreateSourceMapper(), !state.getLanguageVersionSettings().supportsFeature(LanguageFeature.CorrectSourceMappingSyntax));
         }
 
         v.done();
@@ -730,6 +731,19 @@ public abstract class MemberCodegen<T extends KtPureElement/* TODO: & KtDeclarat
         return sourceMapper;
     }
 
+    protected void initDefaultSourceMappingIfNeeded() {
+        if (state.isInlineDisabled()) return;
+
+        CodegenContext parentContext = context.getParentContext();
+        while (parentContext != null) {
+            if (parentContext.isInlineMethodContext()) {
+                alwaysWriteSourceMap = true;
+                return;
+            }
+            parentContext = parentContext.getParentContext();
+        }
+    }
+
     protected void generateConstInstance(@NotNull Type thisAsmType, @NotNull Type fieldAsmType) {
         v.newField(
                 JvmDeclarationOriginKt.OtherOriginFromPure(element), ACC_STATIC | ACC_FINAL | ACC_PUBLIC, JvmAbi.INSTANCE_FIELD,

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/SMAP.kt

@@ -95,6 +95,9 @@ class SourceMapper(val sourceInfo: SourceInfo?) {
         }
     }
 
+    val isTrivial: Boolean
+        get() = maxUsedValue == 0 || maxUsedValue == sourceInfo?.linesInFile
+
     private fun getOrRegisterNewSource(name: String, path: String): FileMapping =
         fileMappings.getOrPut(name to path) { FileMapping(name, path) }
 

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/inlineCodegenUtils.kt

@@ -565,22 +565,6 @@ class InlineOnlySmapSkipper(codegen: BaseExpressionCodegen) {
     }
 }
 
-fun initDefaultSourceMappingIfNeeded(
-    context: CodegenContext<*>, codegen: MemberCodegen<*>, state: GenerationState
-) {
-    if (state.isInlineDisabled) return
-
-    var parentContext: CodegenContext<*>? = context.parentContext
-    while (parentContext != null) {
-        if (parentContext.isInlineMethodContext) {
-            //just init default one to one mapping
-            codegen.orCreateSourceMapper
-            break
-        }
-        parentContext = parentContext.parentContext
-    }
-}
-
 fun MethodNode.preprocessSuspendMarkers(forInline: Boolean, keepFakeContinuation: Boolean = true) {
     if (instructions.first == null) return
     if (!keepFakeContinuation) {

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

@@ -89,8 +89,6 @@ abstract class ClassCodegen protected constructor(
         )
     }
 
-    internal var writeSourceMap: Boolean = withinInline
-
     private var regeneratedObjectNameGenerators = mutableMapOf<String, NameGenerator>()
 
     fun getRegeneratedObjectNameGenerator(function: IrFunction): NameGenerator {
@@ -145,7 +143,7 @@ abstract class ClassCodegen protected constructor(
 
         generateInnerAndOuterClasses()
 
-        if (writeSourceMap) {
+        if (withinInline || !smap.isTrivial) {
             visitor.visitSMAP(smap, !context.state.languageVersionSettings.supportsFeature(LanguageFeature.CorrectSourceMappingSyntax))
         } else {
             visitor.visitSource(smap.sourceInfo!!.source, null)

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

@@ -86,7 +86,7 @@ class IrSourceCompilerForInline(
         }
 
     override val lazySourceMapper: SourceMapper
-        get() = codegen.smap.also { codegen.classCodegen.writeSourceMap = true }
+        get() = codegen.smap
 
     override fun generateLambdaBody(lambdaInfo: ExpressionLambda): SMAPAndMethodNode =
         FunctionCodegen((lambdaInfo as IrExpressionLambdaImpl).function, codegen.classCodegen, codegen).generate()

compiler/testData/codegen/boxInline/smap/assertion.kt

@@ -37,17 +37,6 @@ fun box(): String {
 }
 
 // FILE: 1.smap
-//TODO maybe do smth with default method body mapping
-SMAP
-1.kt
-Kotlin
-*S Kotlin
-*F
-+ 1 1.kt
-test/_1Kt
-*L
-1#1,26:1
-*E
 
 // FILE: 2.smap
 

compiler/testData/codegen/boxInline/smap/crossroutines.kt

@@ -83,17 +83,6 @@ test/_1Kt$inlineMe1$2$run$1
 *E
 
 // FILE: 2.smap
-SMAP
-2.kt
-Kotlin
-*S Kotlin
-*F
-+ 1 2.kt
-_2Kt$builder$1
-*L
-1#1,29:1
-*E
-
 SMAP
 2.kt
 Kotlin

compiler/testData/codegen/boxInline/smap/defaultFunction.kt

@@ -15,18 +15,6 @@ fun box(): String {
 }
 
 // FILE: 1.smap
-//TODO maybe do smth with default method body mapping
-SMAP
-1.kt
-Kotlin
-*S Kotlin
-*F
-+ 1 1.kt
-test/_1Kt
-*L
-1#1,9:1
-*E
-
 SMAP
 1.kt
 Kotlin

compiler/testData/codegen/boxInline/smap/defaultLambda/defaultLambdaInAnonymous.kt

@@ -44,17 +44,6 @@ fun box(): String {
 }
 
 // FILE: 1.smap
-SMAP
-1.kt
-Kotlin
-*S Kotlin
-*F
-+ 1 1.kt
-test/_1Kt
-*L
-1#1,39:1
-*E
-
 SMAP
 1.kt
 Kotlin

compiler/testData/codegen/boxInline/smap/defaultLambda/inlinInDefault.kt

@@ -46,17 +46,6 @@ fun box(): String {
 }
 
 // FILE: 1.smap
-SMAP
-1.kt
-Kotlin
-*S Kotlin
-*F
-+ 1 1.kt
-test/_1Kt
-*L
-1#1,39:1
-*E
-
 SMAP
 1.kt
 Kotlin

compiler/testData/codegen/boxInline/smap/defaultLambda/inlinInDefault2.kt

@@ -82,17 +82,6 @@ fun box(): String {
 }
 
 // FILE: 1.smap
-SMAP
-1.kt
-Kotlin
-*S Kotlin
-*F
-+ 1 1.kt
-test/_1Kt
-*L
-1#1,75:1
-*E
-
 SMAP
 1.kt
 Kotlin

compiler/testData/codegen/boxInline/smap/defaultLambda/inlineAnonymousInDefault.kt

@@ -45,17 +45,6 @@ fun box(): String {
 }
 
 // FILE: 1.smap
-SMAP
-1.kt
-Kotlin
-*S Kotlin
-*F
-+ 1 1.kt
-test/_1Kt
-*L
-1#1,40:1
-*E
-
 SMAP
 1.kt
 Kotlin

compiler/testData/codegen/boxInline/smap/defaultLambda/inlineAnonymousInDefault2.kt

@@ -47,17 +47,6 @@ fun box(): String {
 }
 
 // FILE: 1.smap
-SMAP
-1.kt
-Kotlin
-*S Kotlin
-*F
-+ 1 1.kt
-test/_1Kt
-*L
-1#1,40:1
-*E
-
 SMAP
 1.kt
 Kotlin

compiler/testData/codegen/boxInline/smap/defaultLambda/kt21827.kt

@@ -45,17 +45,6 @@ fun box(): String {
 }
 
 // FILE: 1.smap
-SMAP
-1.kt
-Kotlin
-*S Kotlin
-*F
-+ 1 1.kt
-test/_1Kt
-*L
-1#1,38:1
-*E
-
 SMAP
 1.kt
 Kotlin

compiler/testData/codegen/boxInline/smap/defaultLambda/nested.kt

@@ -19,18 +19,6 @@ fun box(): String {
 }
 
 // FILE: 1.smap
-//TODO maybe do smth with default method body mapping
-SMAP
-1.kt
-Kotlin
-*S Kotlin
-*F
-+ 1 1.kt
-test/_1Kt
-*L
-1#1,13:1
-*E
-
 SMAP
 1.kt
 Kotlin

compiler/testData/codegen/boxInline/smap/defaultLambda/simple.kt

@@ -17,18 +17,6 @@ fun box(): String {
 }
 
 // FILE: 1.smap
-//TODO maybe do smth with default method body mapping
-SMAP
-1.kt
-Kotlin
-*S Kotlin
-*F
-+ 1 1.kt
-test/_1Kt
-*L
-1#1,11:1
-*E
-
 SMAP
 1.kt
 Kotlin

compiler/testData/codegen/boxInline/smap/defaultLambda/simple2.kt

@@ -43,17 +43,6 @@ fun box(): String {
 }
 
 // FILE: 1.smap
-SMAP
-1.kt
-Kotlin
-*S Kotlin
-*F
-+ 1 1.kt
-test/_1Kt
-*L
-1#1,38:1
-*E
-
 SMAP
 1.kt
 Kotlin

compiler/testData/codegen/boxInline/smap/inlineOnly/noSmap.kt

@@ -13,14 +13,3 @@ fun box(): String {
 }
 
 // FILE: 2.smap
-
-SMAP
-2.kt
-Kotlin
-*S Kotlin
-*F
-+ 1 2.kt
-_2Kt
-*L
-1#1,7:1
-*E

compiler/testData/codegen/boxInline/smap/inlineOnly/noSmapWithProperty.kt

@@ -18,14 +18,3 @@ fun box(): String {
 }
 
 // FILE: 2.smap
-
-SMAP
-2.kt
-Kotlin
-*S Kotlin
-*F
-+ 1 2.kt
-_2Kt
-*L
-1#1,8:1
-*E

compiler/testData/codegen/boxInline/smap/inlineOnly/stdlibInlineOnly.kt

@@ -0,0 +1,21 @@
+// FILE: 1.kt
+package test
+
+@Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
+@kotlin.internal.InlineOnly
+inline fun <T, R> T.myLet(block: (T) -> R) = block(this)
+
+// FILE: 2.kt
+import test.*
+
+fun box(): String {
+    // should not have any line numbers
+    val k = "".myLet {
+        it + "K"
+    }
+    return "O".myLet(fun (it: String): String {
+        return it + k
+    })
+}
+
+// FILE: 2.smap

compiler/testData/codegen/boxInline/smap/inlineOnly/stdlibInlineOnlyOneLine.kt

@@ -0,0 +1,16 @@
+// FILE: 1.kt
+package test
+
+@Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
+@kotlin.internal.InlineOnly
+inline fun <T, R> T.myLet(block: (T) -> R) = block(this)
+
+// FILE: 2.kt
+import test.*
+
+fun box(): String {
+    val k = "".myLet { it + "K" }
+    return "O".myLet(fun (it: String): String { return it + k })
+}
+
+// FILE: 2.smap

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxInlineCodegenTestGenerated.java

@@ -3522,6 +3522,16 @@ public class BlackBoxInlineCodegenTestGenerated extends AbstractBlackBoxInlineCo
             public void testReifiedProperty() throws Exception {
                 runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/reifiedProperty.kt");
             }
+
+            @TestMetadata("stdlibInlineOnly.kt")
+            public void testStdlibInlineOnly() throws Exception {
+                runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/stdlibInlineOnly.kt");
+            }
+
+            @TestMetadata("stdlibInlineOnlyOneLine.kt")
+            public void testStdlibInlineOnlyOneLine() throws Exception {
+                runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/stdlibInlineOnlyOneLine.kt");
+            }
         }
 
         @TestMetadata("compiler/testData/codegen/boxInline/smap/newsmap")

compiler/tests/org/jetbrains/kotlin/codegen/CompileKotlinAgainstInlineKotlinTestGenerated.java

@@ -3522,6 +3522,16 @@ public class CompileKotlinAgainstInlineKotlinTestGenerated extends AbstractCompi
             public void testReifiedProperty() throws Exception {
                 runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/reifiedProperty.kt");
             }
+
+            @TestMetadata("stdlibInlineOnly.kt")
+            public void testStdlibInlineOnly() throws Exception {
+                runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/stdlibInlineOnly.kt");
+            }
+
+            @TestMetadata("stdlibInlineOnlyOneLine.kt")
+            public void testStdlibInlineOnlyOneLine() throws Exception {
+                runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/stdlibInlineOnlyOneLine.kt");
+            }
         }
 
         @TestMetadata("compiler/testData/codegen/boxInline/smap/newsmap")

compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxInlineCodegenTestGenerated.java

@@ -3522,6 +3522,16 @@ public class IrBlackBoxInlineCodegenTestGenerated extends AbstractIrBlackBoxInli
             public void testReifiedProperty() throws Exception {
                 runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/reifiedProperty.kt");
             }
+
+            @TestMetadata("stdlibInlineOnly.kt")
+            public void testStdlibInlineOnly() throws Exception {
+                runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/stdlibInlineOnly.kt");
+            }
+
+            @TestMetadata("stdlibInlineOnlyOneLine.kt")
+            public void testStdlibInlineOnlyOneLine() throws Exception {
+                runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/stdlibInlineOnlyOneLine.kt");
+            }
         }
 
         @TestMetadata("compiler/testData/codegen/boxInline/smap/newsmap")

compiler/tests/org/jetbrains/kotlin/codegen/ir/IrCompileKotlinAgainstInlineKotlinTestGenerated.java

@@ -3522,6 +3522,16 @@ public class IrCompileKotlinAgainstInlineKotlinTestGenerated extends AbstractIrC
             public void testReifiedProperty() throws Exception {
                 runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/reifiedProperty.kt");
             }
+
+            @TestMetadata("stdlibInlineOnly.kt")
+            public void testStdlibInlineOnly() throws Exception {
+                runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/stdlibInlineOnly.kt");
+            }
+
+            @TestMetadata("stdlibInlineOnlyOneLine.kt")
+            public void testStdlibInlineOnlyOneLine() throws Exception {
+                runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/stdlibInlineOnlyOneLine.kt");
+            }
         }
 
         @TestMetadata("compiler/testData/codegen/boxInline/smap/newsmap")

compiler/tests/org/jetbrains/kotlin/jvm/compiler/CompileKotlinAgainstCustomBinariesTest.kt

@@ -438,32 +438,12 @@ class CompileKotlinAgainstCustomBinariesTest : AbstractKotlinCompilerIntegration
 
         compileKotlin("source.kt", tmpdir, listOf(tmpdir))
 
-        var debugInfo: String? = null
         val resultFile = File(tmpdir.absolutePath, "test/B.class")
         ClassReader(resultFile.readBytes()).accept(object : ClassVisitor(Opcodes.API_VERSION) {
             override fun visitSource(source: String?, debug: String?) {
-                debugInfo = debug
+                assertEquals(null, debug)
             }
         }, 0)
-
-        val expected = """
-            SMAP
-            source.kt
-            Kotlin
-            *S Kotlin
-            *F
-            + 1 source.kt
-            test/B
-            *L
-            1#1,13:1
-            *E
-        """.trimIndent() + "\n"
-
-        if (GENERATE_SMAP) {
-            assertEquals(expected, debugInfo)
-        } else {
-            assertEquals(null, debugInfo)
-        }
     }
 
     /* Regression test for KT-37107: compile against .class file without any constructors. */

js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenInlineTestGenerated.java

@@ -3122,6 +3122,16 @@ public class IrJsCodegenInlineTestGenerated extends AbstractIrJsCodegenInlineTes
             public void testNoSmapWithProperty() throws Exception {
                 runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/noSmapWithProperty.kt");
             }
+
+            @TestMetadata("stdlibInlineOnly.kt")
+            public void testStdlibInlineOnly() throws Exception {
+                runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/stdlibInlineOnly.kt");
+            }
+
+            @TestMetadata("stdlibInlineOnlyOneLine.kt")
+            public void testStdlibInlineOnlyOneLine() throws Exception {
+                runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/stdlibInlineOnlyOneLine.kt");
+            }
         }
 
         @TestMetadata("compiler/testData/codegen/boxInline/smap/newsmap")

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenInlineTestGenerated.java

@@ -3122,6 +3122,16 @@ public class JsCodegenInlineTestGenerated extends AbstractJsCodegenInlineTest {
             public void testNoSmapWithProperty() throws Exception {
                 runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/noSmapWithProperty.kt");
             }
+
+            @TestMetadata("stdlibInlineOnly.kt")
+            public void testStdlibInlineOnly() throws Exception {
+                runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/stdlibInlineOnly.kt");
+            }
+
+            @TestMetadata("stdlibInlineOnlyOneLine.kt")
+            public void testStdlibInlineOnlyOneLine() throws Exception {
+                runTest("compiler/testData/codegen/boxInline/smap/inlineOnly/stdlibInlineOnlyOneLine.kt");
+            }
         }
 
         @TestMetadata("compiler/testData/codegen/boxInline/smap/newsmap")