A couple of konanc driver tests.

backend.native/tests/build.gradle

@@ -1554,11 +1554,24 @@ task deserialized_inline0(type: RunKonanTest) {
     source = "serialization/deserialized_inline0.kt"
     flags = ["--enable", "deserializer"]
 }
+
 task deserialized_listof0(type: RunKonanTest) {
     source = "serialization/deserialized_listof0.kt"
     flags = ["--enable", "deserializer"]
 }
 
+// Just check that the driver is able to produce runnable binaries.
+task driver0(type: RunDriverKonanTest) {
+    goldValue = "Hello, world!\n"
+    source = "runtime/basic/hello0.kt"
+}
+
+task driver_opt(type: RunDriverKonanTest) {
+    goldValue = "Hello, world!\n"
+    source = "runtime/basic/hello0.kt"
+    flags = ["-opt"]
+}
+
 // Enable when deserialization for default arguments is fixed.
 task inline_defaultArgs_linkTest(type: LinkKonanTest) {
     disabled = true

buildSrc/src/main/groovy/org/jetbrains/kotlin/KonanTest.groovy

@@ -33,6 +33,7 @@ abstract class KonanTest extends JavaExec {
     def launcherBc = new File("${dist.canonicalPath}/lib/launcher.bc").absolutePath
     def startKtBc = new File("${dist.canonicalPath}/lib/start.kt.bc").absolutePath
     def stdlibKtBc = new File("${dist.canonicalPath}/lib/stdlib.kt.bc").absolutePath
+    def konanc = new File("${dist.canonicalPath}/bin/konanc").absolutePath
     def mainC = 'main.c'
     def outputSourceSetName = "testOutputLocal"
     String outputDirectory = null
@@ -219,6 +220,37 @@ class RunKonanTest extends KonanTest {
     }
 }
 
+// This is another way to run the compiler.
+// Don't use this task for regular testing as
+// project.exec + a shell script isolate the jvm
+// from IDEA. Use the RunKonanTest instead.
+@ParallelizableTask
+class RunDriverKonanTest extends KonanTest {
+    void compileTest(List<String> filesToCompile, String exe) {
+        runCompiler(filesToCompile, exe, flags?:[])
+    }
+
+    protected void runCompiler(List<String> filesToCompile, String output, List<String> moreArgs) {
+        def log = new ByteArrayOutputStream()
+        project.exec {
+            commandLine konanc
+            args = ["-output", output,
+                    "-ea",
+                    *filesToCompile,
+                    *moreArgs,
+                    *project.globalTestArgs]
+            if (project.testTarget) {
+                args "-target", project.testTarget
+            }
+            standardOutput = log
+            errorOutput = log
+        }
+        def logString = log.toString()
+        project.file("${output}.compilation.log").write(logString)
+        println(logString)
+    }
+}
+
 @ParallelizableTask
 class RunInteropKonanTest extends KonanTest {