command line flag to repeat compilation multiple times

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.java

@@ -43,6 +43,11 @@ public abstract class CommonCompilerArguments {
     @Argument(value = "Xno-inline", description = "Disable method inlining")
     public boolean noInline;
 
+    // TODO Remove in 1.0
+    @Argument(value = "Xrepeat", description = "Repeat compilation (for performance analysis)")
+    @ValueDescription("<count>")
+    public String repeat;
+
     @Argument(value = "Xplugin", description = "Load plugins from the given classpath")
     @ValueDescription("<path>")
     public String[] pluginClasspaths;

compiler/cli/src/org/jetbrains/kotlin/cli/common/CLICompiler.java

@@ -144,15 +144,29 @@ public abstract class CLICompiler<A extends CommonCompilerArguments> {
 
         GroupingMessageCollector groupingCollector = new GroupingMessageCollector(messageCollector);
         try {
-            Disposable rootDisposable = Disposer.newDisposable();
-            try {
-                MessageSeverityCollector severityCollector = new MessageSeverityCollector(groupingCollector);
-                ExitCode code = doExecute(arguments, services, severityCollector, rootDisposable);
-                return severityCollector.anyReported(CompilerMessageSeverity.ERROR) ? COMPILATION_ERROR : code;
+            ExitCode exitCode = OK;
+
+            int repeatCount = 1;
+            if (arguments.repeat != null) {
+                try {
+                    repeatCount = Integer.parseInt(arguments.repeat);
+                }
+                catch (NumberFormatException ignored) {
+                }
             }
-            finally {
-                Disposer.dispose(rootDisposable);
+
+            for (int i = 0; i < repeatCount; i++) {
+                Disposable rootDisposable = Disposer.newDisposable();
+                try {
+                    MessageSeverityCollector severityCollector = new MessageSeverityCollector(groupingCollector);
+                    ExitCode code = doExecute(arguments, services, severityCollector, rootDisposable);
+                    exitCode = severityCollector.anyReported(CompilerMessageSeverity.ERROR) ? COMPILATION_ERROR : code;
+                }
+                finally {
+                    Disposer.dispose(rootDisposable);
+                }
             }
+            return exitCode;
         }
         catch (Throwable t) {
             groupingCollector.report(CompilerMessageSeverity.EXCEPTION, OutputMessageUtil.renderException(t),

compiler/testData/cli/js/jsExtraHelp.out

@@ -1,6 +1,7 @@
 Usage: kotlinc-js <options> <source files>
 where advanced options include:
   -Xno-inline                Disable method inlining
+  -Xrepeat <count>           Repeat compilation (for performance analysis)
   -Xplugin <path>            Load plugins from the given classpath
 
 Advanced options are non-standard and may be changed or removed without any notice.

compiler/testData/cli/jvm/extraHelp.out

@@ -5,6 +5,7 @@ where advanced options include:
   -Xno-optimize              Disable optimizations
   -Xreport-perf              Report detailed performance statistics
   -Xno-inline                Disable method inlining
+  -Xrepeat <count>           Repeat compilation (for performance analysis)
   -Xplugin <path>            Load plugins from the given classpath
 
 Advanced options are non-standard and may be changed or removed without any notice.