unittests/Transforms/Vectorize/VPlanDominatorTreeTest.cpp

   1 //===- llvm/unittests/Transforms/Vectorize/VPlanDominatorTreeTest.cpp -----===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "../lib/Transforms/Vectorize/VPlanHCFGBuilder.h"
  11 #include "VPlanTestBase.h"
  12 #include "gtest/gtest.h"
  13
  14 namespace llvm {
  15 namespace {
  16
  17 class VPlanDominatorTreeTest : public VPlanTestBase {};
  18
  19 TEST_F(VPlanDominatorTreeTest, BasicVPBBDomination) {
  20   const char *ModuleString =
  21       "define void @f(i32* %a, i32* %b, i32* %c, i32 %N, i32 %M, i32 %K) {\n"
  22       "entry:\n"
  23       "  br label %for.body\n"
  24       "for.body:\n"
  25       "  %iv = phi i64 [ 0, %entry ], [ %iv.next, %for.inc ]\n"
  26       "  br i1 true, label %if.then, label %if.else\n"
  27       "if.then:\n"
  28       "  br label %for.inc\n"
  29       "if.else:\n"
  30       "  br label %for.inc\n"
  31       "for.inc:\n"
  32       "  %iv.next = add nuw nsw i64 %iv, 1\n"
  33       "  %exitcond = icmp eq i64 %iv.next, 300\n"
  34       "  br i1 %exitcond, label %for.end, label %for.body\n"
  35       "for.end:\n"
  36       "  ret void\n"
  37       "}\n";
  38
  39   Module &M = parseModule(ModuleString);
  40
  41   Function *F = M.getFunction("f");
  42   BasicBlock *LoopHeader = F->getEntryBlock().getSingleSuccessor();
  43   auto Plan = buildPlainCFG(LoopHeader);
  44
  45   // Build VPlan domination tree analysis.
  46   VPRegionBlock *TopRegion = cast<VPRegionBlock>(Plan->getEntry());
  47   VPDominatorTree VPDT;
  48   VPDT.recalculate(*TopRegion);
  49
  50   VPBlockBase *PH = TopRegion->getEntry();
  51   VPBlockBase *H = PH->getSingleSuccessor();
  52   VPBlockBase *IfThen = H->getSuccessors()[0];
  53   VPBlockBase *IfElse = H->getSuccessors()[1];
  54   VPBlockBase *Latch = IfThen->getSingleSuccessor();
  55   VPBlockBase *Exit = Latch->getSuccessors()[0] != H
  56                           ? Latch->getSuccessors()[0]
  57                           : Latch->getSuccessors()[1];
  58   // Reachability.
  59   EXPECT_TRUE(VPDT.isReachableFromEntry(PH));
  60   EXPECT_TRUE(VPDT.isReachableFromEntry(H));
  61   EXPECT_TRUE(VPDT.isReachableFromEntry(IfThen));
  62   EXPECT_TRUE(VPDT.isReachableFromEntry(IfElse));
  63   EXPECT_TRUE(VPDT.isReachableFromEntry(Latch));
  64   EXPECT_TRUE(VPDT.isReachableFromEntry(Exit));
  65
  66   // VPBB dominance.
  67   EXPECT_TRUE(VPDT.dominates(PH, PH));
  68   EXPECT_TRUE(VPDT.dominates(PH, H));
  69   EXPECT_TRUE(VPDT.dominates(PH, IfThen));
  70   EXPECT_TRUE(VPDT.dominates(PH, IfElse));
  71   EXPECT_TRUE(VPDT.dominates(PH, Latch));
  72   EXPECT_TRUE(VPDT.dominates(PH, Exit));
  73
  74   EXPECT_FALSE(VPDT.dominates(H, PH));
  75   EXPECT_TRUE(VPDT.dominates(H, H));
  76   EXPECT_TRUE(VPDT.dominates(H, IfThen));
  77   EXPECT_TRUE(VPDT.dominates(H, IfElse));
  78   EXPECT_TRUE(VPDT.dominates(H, Latch));
  79   EXPECT_TRUE(VPDT.dominates(H, Exit));
  80
  81   EXPECT_FALSE(VPDT.dominates(IfThen, PH));
  82   EXPECT_FALSE(VPDT.dominates(IfThen, H));
  83   EXPECT_TRUE(VPDT.dominates(IfThen, IfThen));
  84   EXPECT_FALSE(VPDT.dominates(IfThen, IfElse));
  85   EXPECT_FALSE(VPDT.dominates(IfThen, Latch));
  86   EXPECT_FALSE(VPDT.dominates(IfThen, Exit));
  87
  88   EXPECT_FALSE(VPDT.dominates(IfElse, PH));
  89   EXPECT_FALSE(VPDT.dominates(IfElse, H));
  90   EXPECT_FALSE(VPDT.dominates(IfElse, IfThen));
  91   EXPECT_TRUE(VPDT.dominates(IfElse, IfElse));
  92   EXPECT_FALSE(VPDT.dominates(IfElse, Latch));
  93   EXPECT_FALSE(VPDT.dominates(IfElse, Exit));
  94
  95   EXPECT_FALSE(VPDT.dominates(Latch, PH));
  96   EXPECT_FALSE(VPDT.dominates(Latch, H));
  97   EXPECT_FALSE(VPDT.dominates(Latch, IfThen));
  98   EXPECT_FALSE(VPDT.dominates(Latch, IfElse));
  99   EXPECT_TRUE(VPDT.dominates(Latch, Latch));
 100   EXPECT_TRUE(VPDT.dominates(Latch, Exit));
 101
 102   EXPECT_FALSE(VPDT.dominates(Exit, PH));
 103   EXPECT_FALSE(VPDT.dominates(Exit, H));
 104   EXPECT_FALSE(VPDT.dominates(Exit, IfThen));
 105   EXPECT_FALSE(VPDT.dominates(Exit, IfElse));
 106   EXPECT_FALSE(VPDT.dominates(Exit, Latch));
 107   EXPECT_TRUE(VPDT.dominates(Exit, Exit));
 108
 109   // VPBB proper dominance.
 110   EXPECT_FALSE(VPDT.properlyDominates(PH, PH));
 111   EXPECT_TRUE(VPDT.properlyDominates(PH, H));
 112   EXPECT_TRUE(VPDT.properlyDominates(PH, IfThen));
 113   EXPECT_TRUE(VPDT.properlyDominates(PH, IfElse));
 114   EXPECT_TRUE(VPDT.properlyDominates(PH, Latch));
 115   EXPECT_TRUE(VPDT.properlyDominates(PH, Exit));
 116
 117   EXPECT_FALSE(VPDT.properlyDominates(H, PH));
 118   EXPECT_FALSE(VPDT.properlyDominates(H, H));
 119   EXPECT_TRUE(VPDT.properlyDominates(H, IfThen));
 120   EXPECT_TRUE(VPDT.properlyDominates(H, IfElse));
 121   EXPECT_TRUE(VPDT.properlyDominates(H, Latch));
 122   EXPECT_TRUE(VPDT.properlyDominates(H, Exit));
 123
 124   EXPECT_FALSE(VPDT.properlyDominates(IfThen, PH));
 125   EXPECT_FALSE(VPDT.properlyDominates(IfThen, H));
 126   EXPECT_FALSE(VPDT.properlyDominates(IfThen, IfThen));
 127   EXPECT_FALSE(VPDT.properlyDominates(IfThen, IfElse));
 128   EXPECT_FALSE(VPDT.properlyDominates(IfThen, Latch));
 129   EXPECT_FALSE(VPDT.properlyDominates(IfThen, Exit));
 130
 131   EXPECT_FALSE(VPDT.properlyDominates(IfElse, PH));
 132   EXPECT_FALSE(VPDT.properlyDominates(IfElse, H));
 133   EXPECT_FALSE(VPDT.properlyDominates(IfElse, IfThen));
 134   EXPECT_FALSE(VPDT.properlyDominates(IfElse, IfElse));
 135   EXPECT_FALSE(VPDT.properlyDominates(IfElse, Latch));
 136   EXPECT_FALSE(VPDT.properlyDominates(IfElse, Exit));
 137
 138   EXPECT_FALSE(VPDT.properlyDominates(Latch, PH));
 139   EXPECT_FALSE(VPDT.properlyDominates(Latch, H));
 140   EXPECT_FALSE(VPDT.properlyDominates(Latch, IfThen));
 141   EXPECT_FALSE(VPDT.properlyDominates(Latch, IfElse));
 142   EXPECT_FALSE(VPDT.properlyDominates(Latch, Latch));
 143   EXPECT_TRUE(VPDT.properlyDominates(Latch, Exit));
 144
 145   EXPECT_FALSE(VPDT.properlyDominates(Exit, PH));
 146   EXPECT_FALSE(VPDT.properlyDominates(Exit, H));
 147   EXPECT_FALSE(VPDT.properlyDominates(Exit, IfThen));
 148   EXPECT_FALSE(VPDT.properlyDominates(Exit, IfElse));
 149   EXPECT_FALSE(VPDT.properlyDominates(Exit, Latch));
 150   EXPECT_FALSE(VPDT.properlyDominates(Exit, Exit));
 151
 152   // VPBB nearest common dominator.
 153   EXPECT_EQ(PH, VPDT.findNearestCommonDominator(PH, PH));
 154   EXPECT_EQ(PH, VPDT.findNearestCommonDominator(PH, H));
 155   EXPECT_EQ(PH, VPDT.findNearestCommonDominator(PH, IfThen));
 156   EXPECT_EQ(PH, VPDT.findNearestCommonDominator(PH, IfElse));
 157   EXPECT_EQ(PH, VPDT.findNearestCommonDominator(PH, Latch));
 158   EXPECT_EQ(PH, VPDT.findNearestCommonDominator(PH, Exit));
 159
 160   EXPECT_EQ(PH, VPDT.findNearestCommonDominator(H, PH));
 161   EXPECT_EQ(H, VPDT.findNearestCommonDominator(H, H));
 162   EXPECT_EQ(H, VPDT.findNearestCommonDominator(H, IfThen));
 163   EXPECT_EQ(H, VPDT.findNearestCommonDominator(H, IfElse));
 164   EXPECT_EQ(H, VPDT.findNearestCommonDominator(H, Latch));
 165   EXPECT_EQ(H, VPDT.findNearestCommonDominator(H, Exit));
 166
 167   EXPECT_EQ(PH, VPDT.findNearestCommonDominator(IfThen, PH));
 168   EXPECT_EQ(H, VPDT.findNearestCommonDominator(IfThen, H));
 169   EXPECT_EQ(IfThen, VPDT.findNearestCommonDominator(IfThen, IfThen));
 170   EXPECT_EQ(H, VPDT.findNearestCommonDominator(IfThen, IfElse));
 171   EXPECT_EQ(H, VPDT.findNearestCommonDominator(IfThen, Latch));
 172   EXPECT_EQ(H, VPDT.findNearestCommonDominator(IfThen, Exit));
 173
 174   EXPECT_EQ(PH, VPDT.findNearestCommonDominator(IfElse, PH));
 175   EXPECT_EQ(H, VPDT.findNearestCommonDominator(IfElse, H));
 176   EXPECT_EQ(H, VPDT.findNearestCommonDominator(IfElse, IfThen));
 177   EXPECT_EQ(IfElse, VPDT.findNearestCommonDominator(IfElse, IfElse));
 178   EXPECT_EQ(H, VPDT.findNearestCommonDominator(IfElse, Latch));
 179   EXPECT_EQ(H, VPDT.findNearestCommonDominator(IfElse, Exit));
 180
 181   EXPECT_EQ(PH, VPDT.findNearestCommonDominator(Latch, PH));
 182   EXPECT_EQ(H, VPDT.findNearestCommonDominator(Latch, H));
 183   EXPECT_EQ(H, VPDT.findNearestCommonDominator(Latch, IfThen));
 184   EXPECT_EQ(H, VPDT.findNearestCommonDominator(Latch, IfElse));
 185   EXPECT_EQ(Latch, VPDT.findNearestCommonDominator(Latch, Latch));
 186   EXPECT_EQ(Latch, VPDT.findNearestCommonDominator(Latch, Exit));
 187
 188   EXPECT_EQ(PH, VPDT.findNearestCommonDominator(Exit, PH));
 189   EXPECT_EQ(H, VPDT.findNearestCommonDominator(Exit, H));
 190   EXPECT_EQ(H, VPDT.findNearestCommonDominator(Exit, IfThen));
 191   EXPECT_EQ(H, VPDT.findNearestCommonDominator(Exit, IfElse));
 192   EXPECT_EQ(Latch, VPDT.findNearestCommonDominator(Exit, Latch));
 193   EXPECT_EQ(Exit, VPDT.findNearestCommonDominator(Exit, Exit));
 194 }
 195 } // namespace
 196 } // namespace llvm