Collect and verify generated parallel subfunctions

We verify the optimized function now for a long time and it helped to track
  down bugs early. This will now also happen for all parallel subfunctions we
  generate.

llvm-svn: 265823

polly/include/polly/CodeGen/IslNodeBuilder.h

@@ -58,6 +58,11 @@ public:
   /// @return A referecne to the associated block generator.
   BlockGenerator &getBlockGenerator() { return BlockGen; }
 
+  /// @brief Return the parallel subfunctions that have been created.
+  const ArrayRef<Function *> getParallelSubfunctions() const {
+    return ParallelSubfunctions;
+  }
+
 protected:
   Scop &S;
   PollyIRBuilder &Builder;
@@ -103,6 +108,9 @@ protected:
   // ivs.
   IslExprBuilder::IDToValueTy IDToValue;
 
+  /// @brief A collection of all parallel subfunctions that have been created.
+  SmallVector<Function *, 8> ParallelSubfunctions;
+
   /// Generate code for a given SCEV*
   ///
   /// This function generates code for a given SCEV expression. It generated

polly/lib/CodeGen/CodeGeneration.cpp

@@ -202,6 +202,8 @@ public:
     }
 
     verifyGeneratedFunction(S, *EnteringBB->getParent());
+    for (auto *SubF : NodeBuilder.getParallelSubfunctions())
+      verifyGeneratedFunction(S, *SubF);
 
     // Mark the function such that we run additional cleanup passes on this
     // function (e.g. mem2reg to rediscover phi nodes).

polly/lib/CodeGen/IslNodeBuilder.cpp

@@ -622,6 +622,9 @@ void IslNodeBuilder::createForParallel(__isl_take isl_ast_node *For) {
   BasicBlock::iterator AfterLoop = Builder.GetInsertPoint();
   Builder.SetInsertPoint(&*LoopBody);
 
+  // Remember the parallel subfunction
+  ParallelSubfunctions.push_back(LoopBody->getFunction());
+
   // Save the current values.
   auto ValueMapCopy = ValueMap;
   IslExprBuilder::IDToValueTy IDToValueCopy = IDToValue;