unittests/Transforms/Vectorize/VPlanTestBase.h

   1 //===- llvm/unittest/Transforms/Vectorize/VPlanTestBase.h -----------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 /// \file
   9 /// This file defines a VPlanTestBase class, which provides helpers to parse
  10 /// a LLVM IR string and create VPlans given a loop entry block.
  11 //===----------------------------------------------------------------------===//
  12 #ifndef LLVM_UNITTESTS_TRANSFORMS_VECTORIZE_VPLANTESTBASE_H
  13 #define LLVM_UNITTESTS_TRANSFORMS_VECTORIZE_VPLANTESTBASE_H
  14
  15 #include "../lib/Transforms/Vectorize/VPlan.h"
  16 #include "../lib/Transforms/Vectorize/VPlanHCFGBuilder.h"
  17 #include "llvm/Analysis/LoopInfo.h"
  18 #include "llvm/AsmParser/Parser.h"
  19 #include "llvm/IR/Dominators.h"
  20 #include "llvm/Support/SourceMgr.h"
  21 #include "gtest/gtest.h"
  22
  23 namespace llvm {
  24
  25 /// Helper class to create a module from an assembly string and VPlans for a
  26 /// given loop entry block.
  27 class VPlanTestBase : public testing::Test {
  28 protected:
  29   std::unique_ptr<LLVMContext> Ctx;
  30   std::unique_ptr<Module> M;
  31   std::unique_ptr<LoopInfo> LI;
  32   std::unique_ptr<DominatorTree> DT;
  33
  34   VPlanTestBase() : Ctx(new LLVMContext) {}
  35
  36   Module &parseModule(const char *ModuleString) {
  37     SMDiagnostic Err;
  38     M = parseAssemblyString(ModuleString, Err, *Ctx);
  39     EXPECT_TRUE(M);
  40     return *M;
  41   }
  42
  43   void doAnalysis(Function &F) {
  44     DT.reset(new DominatorTree(F));
  45     LI.reset(new LoopInfo(*DT));
  46   }
  47
  48   VPlanPtr buildHCFG(BasicBlock *LoopHeader) {
  49     doAnalysis(*LoopHeader->getParent());
  50
  51     auto Plan = std::make_unique<VPlan>();
  52     VPlanHCFGBuilder HCFGBuilder(LI->getLoopFor(LoopHeader), LI.get(), *Plan);
  53     HCFGBuilder.buildHierarchicalCFG();
  54     return Plan;
  55   }
  56
  57   /// Build the VPlan plain CFG for the loop starting from \p LoopHeader.
  58   VPlanPtr buildPlainCFG(BasicBlock *LoopHeader) {
  59     doAnalysis(*LoopHeader->getParent());
  60
  61     auto Plan = std::make_unique<VPlan>();
  62     VPlanHCFGBuilder HCFGBuilder(LI->getLoopFor(LoopHeader), LI.get(), *Plan);
  63     VPRegionBlock *TopRegion = HCFGBuilder.buildPlainCFG();
  64     Plan->setEntry(TopRegion);
  65     return Plan;
  66   }
  67 };
  68
  69 } // namespace llvm
  70
  71 #endif // LLVM_UNITTESTS_TRANSFORMS_VECTORIZE_VPLANTESTBASE_H