emitc: Do not add newlines after ModuleOp, TranslationUnitOp

Author: mgehre-amd

mlir/lib/Target/Cpp/TranslateToCpp.cpp

@@ -1638,6 +1638,9 @@ LogicalResult CppEmitter::emitOperation(Operation &op, bool trailingSemicolon) {
   if (hasDeferredEmission(&op))
     return success();
 
+  if (isa<ModuleOp, TranslationUnitOp>(op))
+    return success(); // skip adding newlines
+
   if (getEmittedExpression() ||
       (isa<emitc::ExpressionOp>(op) &&
        shouldBeInlined(cast<emitc::ExpressionOp>(op))))

mlir/test/Target/Cpp/tu.mlir

@@ -1,5 +1,5 @@
-// RUN: mlir-translate -mlir-to-cpp %s | FileCheck %s --check-prefix NO-FILTER
-// RUN: mlir-translate -mlir-to-cpp -translation-unit-id=non-existing %s | FileCheck %s --check-prefix NON-EXISTING
+// RUN: mlir-translate -mlir-to-cpp %s | FileCheck %s --check-prefix NO-FILTER --allow-empty
+// RUN: mlir-translate -mlir-to-cpp -translation-unit-id=non-existing %s | FileCheck %s --check-prefix NON-EXISTING --allow-empty
 // RUN: mlir-translate -mlir-to-cpp -translation-unit-id=tu_one %s | FileCheck %s --check-prefix TU-ONE
 // RUN: mlir-translate -mlir-to-cpp -translation-unit-id=tu_two %s | FileCheck %s --check-prefix TU-TWO