Add a compiler parameter to generate not-null assertions on method call sites

It is off by default when invoking compiler directly, and on by default when
compiling from IDE

compiler/cli/src/org/jetbrains/jet/cli/jvm/JVMConfigurationKeys.java

@@ -41,4 +41,7 @@ public class JVMConfigurationKeys {
     public static final CompilerConfigurationKey<Boolean> STUBS = CompilerConfigurationKey.create("stubs");
     public static final CompilerConfigurationKey<BuiltinToJavaTypesMapping> BUILTIN_TO_JAVA_TYPES_MAPPING_KEY =
             CompilerConfigurationKey.create("builtin to java types mapping");
+
+    public static final CompilerConfigurationKey<Boolean> GENERATE_NOT_NULL_ASSERTIONS =
+            CompilerConfigurationKey.create("generate not-null assertions");
 }

compiler/cli/src/org/jetbrains/jet/cli/jvm/K2JVMCompiler.java

@@ -110,6 +110,8 @@ public class K2JVMCompiler extends CLICompiler<K2JVMCompilerArguments> {
         configuration.put(JVMConfigurationKeys.BUILTIN_TO_JAVA_TYPES_MAPPING_KEY,
                                   builtins ? BuiltinToJavaTypesMapping.DISABLED : BuiltinToJavaTypesMapping.ENABLED);
 
+        configuration.put(JVMConfigurationKeys.GENERATE_NOT_NULL_ASSERTIONS, arguments.notNullAssertions);
+
         configuration.put(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY, messageCollector);
 
         messageCollector.report(CompilerMessageSeverity.LOGGING, "Configuring the compilation environment",

compiler/cli/src/org/jetbrains/jet/cli/jvm/K2JVMCompilerArguments.java

@@ -25,6 +25,7 @@ import java.util.List;
 /**
  * Command line arguments for the {@link K2JVMCompiler}
  */
+@SuppressWarnings("UnusedDeclaration")
 public class K2JVMCompilerArguments extends CompilerArguments {
 
 
@@ -63,6 +64,9 @@ public class K2JVMCompilerArguments extends CompilerArguments {
     @Argument(value = "noJdkAnnotations", description = "don't include JDK external annotations into classpath")
     public boolean noJdkAnnotations;
 
+    @Argument(value = "notNullAssertions", description = "generate not-null assertion after each invokation of method returning not-null")
+    public boolean notNullAssertions;
+
     @Argument(value = "builtins", description = "compile builtin classes (internal)")
     public boolean builtins;
 

compiler/cli/src/org/jetbrains/jet/cli/jvm/compiler/KotlinToJVMBytecodeCompiler.java

@@ -341,11 +341,11 @@ public class KotlinToJVMBytecodeCompiler {
                 environment.getConfiguration().get(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY).report(CompilerMessageSeverity.LOGGING, message, CompilerMessageLocation.NO_LOCATION);
             }
         };
-        GenerationState generationState = new GenerationState(project, ClassBuilderFactories.binaries(stubs), backendProgress,
-                                                              exhaust, environment.getSourceFiles(),
-                                                              environment.getConfiguration().get(
-                                                                      JVMConfigurationKeys.BUILTIN_TO_JAVA_TYPES_MAPPING_KEY,
-                                                                      BuiltinToJavaTypesMapping.ENABLED));
+        GenerationState generationState = new GenerationState(
+                project, ClassBuilderFactories.binaries(stubs), backendProgress, exhaust, environment.getSourceFiles(),
+                environment.getConfiguration().get(JVMConfigurationKeys.BUILTIN_TO_JAVA_TYPES_MAPPING_KEY, BuiltinToJavaTypesMapping.ENABLED),
+                environment.getConfiguration().get(JVMConfigurationKeys.GENERATE_NOT_NULL_ASSERTIONS, false)
+        );
         GenerationStrategy.STANDARD.compileCorrectFiles(generationState, CompilationErrorHandler.THROW_EXCEPTION);
 
         CompilerPluginContext context = new CompilerPluginContext(project, exhaust.getBindingContext(), environment.getSourceFiles());