//===- llvm/unittest/Transforms/Vectorize/VPlanHCFGTest.cpp ---------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #include "../lib/Transforms/Vectorize/VPlan.h" #include "../lib/Transforms/Vectorize/VPlanTransforms.h" #include "VPlanTestBase.h" #include "llvm/Analysis/TargetLibraryInfo.h" #include "llvm/TargetParser/Triple.h" #include "gtest/gtest.h" #include namespace llvm { namespace { class VPlanHCFGTest : public VPlanTestBase {}; TEST_F(VPlanHCFGTest, testBuildHCFGInnerLoop) { const char *ModuleString = "define void @f(i32* %A, i64 %N) {\n" "entry:\n" " br label %for.body\n" "for.body:\n" " %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]\n" " %arr.idx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv\n" " %l1 = load i32, i32* %arr.idx, align 4\n" " %res = add i32 %l1, 10\n" " store i32 %res, i32* %arr.idx, align 4\n" " %indvars.iv.next = add i64 %indvars.iv, 1\n" " %exitcond = icmp ne i64 %indvars.iv.next, %N\n" " br i1 %exitcond, label %for.body, label %for.end\n" "for.end:\n" " ret void\n" "}\n"; Module &M = parseModule(ModuleString); Function *F = M.getFunction("f"); BasicBlock *LoopHeader = F->getEntryBlock().getSingleSuccessor(); auto Plan = buildHCFG(LoopHeader); VPBasicBlock *Entry = Plan->getEntry()->getEntryBasicBlock(); EXPECT_NE(nullptr, Entry->getSingleSuccessor()); EXPECT_EQ(0u, Entry->getNumPredecessors()); EXPECT_EQ(1u, Entry->getNumSuccessors()); // Check that the region following the preheader is a single basic-block // region (loop). VPBasicBlock *VecBB = Entry->getSingleSuccessor()->getEntryBasicBlock(); EXPECT_EQ(8u, VecBB->size()); EXPECT_EQ(0u, VecBB->getNumPredecessors()); EXPECT_EQ(0u, VecBB->getNumSuccessors()); EXPECT_EQ(VecBB->getParent()->getEntryBasicBlock(), VecBB); EXPECT_EQ(VecBB->getParent()->getExitingBasicBlock(), VecBB); EXPECT_EQ(&*Plan, VecBB->getPlan()); auto Iter = VecBB->begin(); VPWidenPHIRecipe *Phi = dyn_cast(&*Iter++); EXPECT_NE(nullptr, Phi); VPInstruction *Idx = dyn_cast(&*Iter++); EXPECT_EQ(Instruction::GetElementPtr, Idx->getOpcode()); EXPECT_EQ(2u, Idx->getNumOperands()); EXPECT_EQ(Phi, Idx->getOperand(1)); VPInstruction *Load = dyn_cast(&*Iter++); EXPECT_EQ(Instruction::Load, Load->getOpcode()); EXPECT_EQ(1u, Load->getNumOperands()); EXPECT_EQ(Idx, Load->getOperand(0)); VPInstruction *Add = dyn_cast(&*Iter++); EXPECT_EQ(Instruction::Add, Add->getOpcode()); EXPECT_EQ(2u, Add->getNumOperands()); EXPECT_EQ(Load, Add->getOperand(0)); VPInstruction *Store = dyn_cast(&*Iter++); EXPECT_EQ(Instruction::Store, Store->getOpcode()); EXPECT_EQ(2u, Store->getNumOperands()); EXPECT_EQ(Add, Store->getOperand(0)); EXPECT_EQ(Idx, Store->getOperand(1)); VPInstruction *IndvarAdd = dyn_cast(&*Iter++); EXPECT_EQ(Instruction::Add, IndvarAdd->getOpcode()); EXPECT_EQ(2u, IndvarAdd->getNumOperands()); EXPECT_EQ(Phi, IndvarAdd->getOperand(0)); VPInstruction *ICmp = dyn_cast(&*Iter++); EXPECT_EQ(Instruction::ICmp, ICmp->getOpcode()); EXPECT_EQ(2u, ICmp->getNumOperands()); EXPECT_EQ(IndvarAdd, ICmp->getOperand(0)); #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP) // Add an external value to check we do not print the list of external values, // as this is not required with the new printing. Plan->getVPValueOrAddLiveIn(&*F->arg_begin()); std::string FullDump; raw_string_ostream OS(FullDump); Plan->printDOT(OS); const char *ExpectedStr = R"(digraph VPlan { graph [labelloc=t, fontsize=30; label="Vectorization Plan\n for UF\>=1\nvp\<%1\> = original trip-count\n"] node [shape=rect, fontname=Courier, fontsize=30] edge [fontname=Courier, fontsize=30] compound=true N0 [label = "ph:\l" + " EMIT vp\<%1\> = EXPAND SCEV (-1 + %N)\l" + "No successors\l" ] N1 [label = "vector.ph:\l" + "Successor(s): vector loop\l" ] N1 -> N2 [ label="" lhead=cluster_N3] subgraph cluster_N3 { fontname=Courier label="\ vector loop" N2 [label = "vector.body:\l" + " WIDEN-PHI ir\<%indvars.iv\> = phi ir\<0\>, ir\<%indvars.iv.next\>\l" + " EMIT ir\<%arr.idx\> = getelementptr ir\<%A\>, ir\<%indvars.iv\>\l" + " EMIT ir\<%l1\> = load ir\<%arr.idx\>\l" + " EMIT ir\<%res\> = add ir\<%l1\>, ir\<10\>\l" + " EMIT store ir\<%res\>, ir\<%arr.idx\>\l" + " EMIT ir\<%indvars.iv.next\> = add ir\<%indvars.iv\>, ir\<1\>\l" + " EMIT ir\<%exitcond\> = icmp ir\<%indvars.iv.next\>, ir\<%N\>\l" + " EMIT branch-on-cond ir\<%exitcond\>\l" + "No successors\l" ] } N2 -> N4 [ label="" ltail=cluster_N3] N4 [label = "middle.block:\l" + "No successors\l" ] } )"; EXPECT_EQ(ExpectedStr, FullDump); #endif TargetLibraryInfoImpl TLII(Triple(M.getTargetTriple())); TargetLibraryInfo TLI(TLII); VPlanTransforms::VPInstructionsToVPRecipes( Plan, [](PHINode *P) { return nullptr; }, *SE, TLI); } TEST_F(VPlanHCFGTest, testVPInstructionToVPRecipesInner) { const char *ModuleString = "define void @f(i32* %A, i64 %N) {\n" "entry:\n" " br label %for.body\n" "for.body:\n" " %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]\n" " %arr.idx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv\n" " %l1 = load i32, i32* %arr.idx, align 4\n" " %res = add i32 %l1, 10\n" " store i32 %res, i32* %arr.idx, align 4\n" " %indvars.iv.next = add i64 %indvars.iv, 1\n" " %exitcond = icmp ne i64 %indvars.iv.next, %N\n" " br i1 %exitcond, label %for.body, label %for.end\n" "for.end:\n" " ret void\n" "}\n"; Module &M = parseModule(ModuleString); Function *F = M.getFunction("f"); BasicBlock *LoopHeader = F->getEntryBlock().getSingleSuccessor(); auto Plan = buildHCFG(LoopHeader); TargetLibraryInfoImpl TLII(Triple(M.getTargetTriple())); TargetLibraryInfo TLI(TLII); VPlanTransforms::VPInstructionsToVPRecipes( Plan, [](PHINode *P) { return nullptr; }, *SE, TLI); VPBlockBase *Entry = Plan->getEntry()->getEntryBasicBlock(); EXPECT_NE(nullptr, Entry->getSingleSuccessor()); EXPECT_EQ(0u, Entry->getNumPredecessors()); EXPECT_EQ(1u, Entry->getNumSuccessors()); // Check that the region following the preheader is a single basic-block // region (loop). VPBasicBlock *VecBB = Entry->getSingleSuccessor()->getEntryBasicBlock(); EXPECT_EQ(8u, VecBB->size()); EXPECT_EQ(0u, VecBB->getNumPredecessors()); EXPECT_EQ(0u, VecBB->getNumSuccessors()); EXPECT_EQ(VecBB->getParent()->getEntryBasicBlock(), VecBB); EXPECT_EQ(VecBB->getParent()->getExitingBasicBlock(), VecBB); auto Iter = VecBB->begin(); EXPECT_NE(nullptr, dyn_cast(&*Iter++)); EXPECT_NE(nullptr, dyn_cast(&*Iter++)); EXPECT_NE(nullptr, dyn_cast(&*Iter++)); EXPECT_NE(nullptr, dyn_cast(&*Iter++)); EXPECT_NE(nullptr, dyn_cast(&*Iter++)); EXPECT_NE(nullptr, dyn_cast(&*Iter++)); EXPECT_NE(nullptr, dyn_cast(&*Iter++)); EXPECT_NE(nullptr, dyn_cast(&*Iter++)); EXPECT_EQ(VecBB->end(), Iter); } } // namespace } // namespace llvm