Use upper bound aware type approximator for intersection types inside sam types in contravariant positions to build proper types in terms of subtyping

compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirBlackBoxCodegenTestGenerated.java

@@ -39182,6 +39182,40 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
             }
         }
 
+        @Nested
+        @TestMetadata("compiler/testData/codegen/box/sam/approximation")
+        @TestDataPath("$PROJECT_ROOT")
+        public class Approximation {
+            @Test
+            public void testAllFilesPresentInApproximation() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/sam/approximation"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+            }
+
+            @Test
+            @TestMetadata("approxToIntermediateType.kt")
+            public void testApproxToIntermediateType() throws Exception {
+                runTest("compiler/testData/codegen/box/sam/approximation/approxToIntermediateType.kt");
+            }
+
+            @Test
+            @TestMetadata("approxToSingleUpperBound.kt")
+            public void testApproxToSingleUpperBound() throws Exception {
+                runTest("compiler/testData/codegen/box/sam/approximation/approxToSingleUpperBound.kt");
+            }
+
+            @Test
+            @TestMetadata("impossibleToApproxToRepresentable.kt")
+            public void testImpossibleToApproxToRepresentable() throws Exception {
+                runTest("compiler/testData/codegen/box/sam/approximation/impossibleToApproxToRepresentable.kt");
+            }
+
+            @Test
+            @TestMetadata("impossibleToApproxToRepresentable2.kt")
+            public void testImpossibleToApproxToRepresentable2() throws Exception {
+                runTest("compiler/testData/codegen/box/sam/approximation/impossibleToApproxToRepresentable2.kt");
+            }
+        }
+
         @Nested
         @TestMetadata("compiler/testData/codegen/box/sam/constructors")
         @TestDataPath("$PROJECT_ROOT")

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/types/ConeTypeContext.kt

@@ -284,6 +284,11 @@ interface ConeTypeContext : TypeSystemContext, TypeSystemOptimizationContext, Ty
         return this.symbol.fir.bounds[index].coneType
     }
 
+    override fun TypeParameterMarker.getUpperBounds(): List<KotlinTypeMarker> {
+        require(this is ConeTypeParameterLookupTag)
+        return this.symbol.fir.bounds.map { it.coneType }
+    }
+
     override fun TypeParameterMarker.getTypeConstructor(): TypeConstructorMarker {
         require(this is ConeTypeParameterLookupTag)
         return this