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//===- 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 "gtest/gtest.h"
#include <string>
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());
EXPECT_EQ(nullptr, Entry->getCondBit());
VPBasicBlock *VecBB = Entry->getSingleSuccessor()->getEntryBasicBlock();
EXPECT_EQ(7u, VecBB->size());
EXPECT_EQ(2u, VecBB->getNumPredecessors());
EXPECT_EQ(2u, VecBB->getNumSuccessors());
EXPECT_EQ(&*Plan, VecBB->getPlan());
auto Iter = VecBB->begin();
VPWidenPHIRecipe *Phi = dyn_cast<VPWidenPHIRecipe>(&*Iter++);
EXPECT_NE(nullptr, Phi);
VPInstruction *Idx = dyn_cast<VPInstruction>(&*Iter++);
EXPECT_EQ(Instruction::GetElementPtr, Idx->getOpcode());
EXPECT_EQ(2u, Idx->getNumOperands());
EXPECT_EQ(Phi, Idx->getOperand(1));
VPInstruction *Load = dyn_cast<VPInstruction>(&*Iter++);
EXPECT_EQ(Instruction::Load, Load->getOpcode());
EXPECT_EQ(1u, Load->getNumOperands());
EXPECT_EQ(Idx, Load->getOperand(0));
VPInstruction *Add = dyn_cast<VPInstruction>(&*Iter++);
EXPECT_EQ(Instruction::Add, Add->getOpcode());
EXPECT_EQ(2u, Add->getNumOperands());
EXPECT_EQ(Load, Add->getOperand(0));
VPInstruction *Store = dyn_cast<VPInstruction>(&*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<VPInstruction>(&*Iter++);
EXPECT_EQ(Instruction::Add, IndvarAdd->getOpcode());
EXPECT_EQ(2u, IndvarAdd->getNumOperands());
EXPECT_EQ(Phi, IndvarAdd->getOperand(0));
VPInstruction *ICmp = dyn_cast<VPInstruction>(&*Iter++);
EXPECT_EQ(Instruction::ICmp, ICmp->getOpcode());
EXPECT_EQ(2u, ICmp->getNumOperands());
EXPECT_EQ(IndvarAdd, ICmp->getOperand(0));
EXPECT_EQ(VecBB->getCondBit(), ICmp);
#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->addVPValue(&*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"]
node [shape=rect, fontname=Courier, fontsize=30]
edge [fontname=Courier, fontsize=30]
compound=true
subgraph cluster_N0 {
fontname=Courier
label="\<x1\> TopRegion"
N1 [label =
"entry:\l" +
"Successor(s): for.body\l"
]
N1 -> N2 [ label=""]
N2 [label =
"for.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" +
"Successor(s): for.body, for.end\l" +
"CondBit: ir\<%exitcond\> (for.body)\l"
]
N2 -> N2 [ label="T"]
N2 -> N3 [ label="F"]
N3 [label =
"for.end:\l" +
" EMIT ret\l" +
"No successors\l"
]
}
}
)";
EXPECT_EQ(ExpectedStr, FullDump);
#endif
SmallPtrSet<Instruction *, 1> DeadInstructions;
VPlanTransforms::VPInstructionsToVPRecipes(
LI->getLoopFor(LoopHeader), Plan, [](PHINode *P) { return nullptr; },
DeadInstructions, *SE);
}
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);
SmallPtrSet<Instruction *, 1> DeadInstructions;
VPlanTransforms::VPInstructionsToVPRecipes(
LI->getLoopFor(LoopHeader), Plan, [](PHINode *P) { return nullptr; },
DeadInstructions, *SE);
VPBlockBase *Entry = Plan->getEntry()->getEntryBasicBlock();
EXPECT_NE(nullptr, Entry->getSingleSuccessor());
EXPECT_EQ(0u, Entry->getNumPredecessors());
EXPECT_EQ(1u, Entry->getNumSuccessors());
VPBasicBlock *VecBB = Entry->getSingleSuccessor()->getEntryBasicBlock();
EXPECT_EQ(7u, VecBB->size());
EXPECT_EQ(2u, VecBB->getNumPredecessors());
EXPECT_EQ(2u, VecBB->getNumSuccessors());
auto Iter = VecBB->begin();
EXPECT_NE(nullptr, dyn_cast<VPWidenPHIRecipe>(&*Iter++));
EXPECT_NE(nullptr, dyn_cast<VPWidenGEPRecipe>(&*Iter++));
EXPECT_NE(nullptr, dyn_cast<VPWidenMemoryInstructionRecipe>(&*Iter++));
EXPECT_NE(nullptr, dyn_cast<VPWidenRecipe>(&*Iter++));
EXPECT_NE(nullptr, dyn_cast<VPWidenMemoryInstructionRecipe>(&*Iter++));
EXPECT_NE(nullptr, dyn_cast<VPWidenRecipe>(&*Iter++));
EXPECT_NE(nullptr, dyn_cast<VPWidenRecipe>(&*Iter++));
EXPECT_EQ(VecBB->end(), Iter);
}
} // namespace
} // namespace llvm
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