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b85a402dd8
This patch adds a new preheader block the VPlan to place SCEV expansions expansions like the trip count. This preheader block is disconnected at the moment, as the bypass blocks of the skeleton are not yet modeled in VPlan. The preheader block is executed before skeleton creation, so the SCEV expansion results can be used during skeleton creation. At the moment, the trip count expression and induction steps are expanded in the new preheader. The remainder of SCEV expansions will be moved gradually in the future. D147965 will update skeleton creation to use the steps expanded in the pre-header to fix #58811. Reviewed By: Ayal Differential Revision: https://reviews.llvm.org/D147964
116 lines
3.7 KiB
C++
116 lines
3.7 KiB
C++
//===- llvm/unittests/Transforms/Vectorize/VPlanVerifierTest.cpp ----------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "../lib/Transforms/Vectorize/VPlanVerifier.h"
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#include "../lib/Transforms/Vectorize/VPlan.h"
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#include "llvm/IR/Instruction.h"
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#include "llvm/IR/Instructions.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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TEST(VPVerifierTest, VPInstructionUseBeforeDefSameBB) {
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VPInstruction *DefI = new VPInstruction(Instruction::Add, {});
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VPInstruction *UseI = new VPInstruction(Instruction::Sub, {DefI});
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VPBasicBlock *VPPH = new VPBasicBlock("ph");
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VPBasicBlock *VPBB1 = new VPBasicBlock();
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VPBB1->appendRecipe(UseI);
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VPBB1->appendRecipe(DefI);
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auto TC = std::make_unique<VPValue>();
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VPlan Plan(VPPH, &*TC, VPBB1);
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#if GTEST_HAS_STREAM_REDIRECTION
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::testing::internal::CaptureStderr();
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#endif
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EXPECT_FALSE(VPlanVerifier::verifyPlanIsValid(Plan));
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#if GTEST_HAS_STREAM_REDIRECTION
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EXPECT_STREQ("Use before def!\n",
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::testing::internal::GetCapturedStderr().c_str());
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#endif
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}
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TEST(VPVerifierTest, VPInstructionUseBeforeDefDifferentBB) {
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VPInstruction *DefI = new VPInstruction(Instruction::Add, {});
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VPInstruction *UseI = new VPInstruction(Instruction::Sub, {DefI});
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auto *CanIV = new VPCanonicalIVPHIRecipe(UseI, {});
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VPInstruction *BranchOnCond =
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new VPInstruction(VPInstruction::BranchOnCond, {CanIV});
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VPBasicBlock *VPPH = new VPBasicBlock("ph");
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VPBasicBlock *VPBB1 = new VPBasicBlock();
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VPBasicBlock *VPBB2 = new VPBasicBlock();
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VPBB1->appendRecipe(UseI);
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VPBB2->appendRecipe(CanIV);
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VPBB2->appendRecipe(DefI);
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VPBB2->appendRecipe(BranchOnCond);
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VPRegionBlock *R1 = new VPRegionBlock(VPBB2, VPBB2, "R1");
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VPBlockUtils::connectBlocks(VPBB1, R1);
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auto TC = std::make_unique<VPValue>();
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VPlan Plan(VPPH, &*TC, VPBB1);
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#if GTEST_HAS_STREAM_REDIRECTION
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::testing::internal::CaptureStderr();
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#endif
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EXPECT_FALSE(VPlanVerifier::verifyPlanIsValid(Plan));
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#if GTEST_HAS_STREAM_REDIRECTION
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EXPECT_STREQ("Use before def!\n",
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::testing::internal::GetCapturedStderr().c_str());
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#endif
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}
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TEST(VPVerifierTest, VPBlendUseBeforeDefDifferentBB) {
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LLVMContext C;
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IntegerType *Int32 = IntegerType::get(C, 32);
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auto *Phi = PHINode::Create(Int32, 1);
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VPInstruction *I1 = new VPInstruction(Instruction::Add, {});
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VPInstruction *DefI = new VPInstruction(Instruction::Add, {});
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auto *CanIV = new VPCanonicalIVPHIRecipe(I1, {});
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VPInstruction *BranchOnCond =
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new VPInstruction(VPInstruction::BranchOnCond, {CanIV});
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auto *Blend = new VPBlendRecipe(Phi, {DefI});
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VPBasicBlock *VPPH = new VPBasicBlock("ph");
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VPBasicBlock *VPBB1 = new VPBasicBlock();
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VPBasicBlock *VPBB2 = new VPBasicBlock();
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VPBasicBlock *VPBB3 = new VPBasicBlock();
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VPBasicBlock *VPBB4 = new VPBasicBlock();
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VPBB1->appendRecipe(I1);
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VPBB2->appendRecipe(CanIV);
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VPBB3->appendRecipe(Blend);
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VPBB4->appendRecipe(DefI);
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VPBB4->appendRecipe(BranchOnCond);
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VPBlockUtils::connectBlocks(VPBB2, VPBB3);
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VPBlockUtils::connectBlocks(VPBB3, VPBB4);
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VPRegionBlock *R1 = new VPRegionBlock(VPBB2, VPBB4, "R1");
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VPBlockUtils::connectBlocks(VPBB1, R1);
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auto TC = std::make_unique<VPValue>();
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VPlan Plan(VPPH, &*TC, VPBB1);
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#if GTEST_HAS_STREAM_REDIRECTION
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::testing::internal::CaptureStderr();
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#endif
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EXPECT_FALSE(VPlanVerifier::verifyPlanIsValid(Plan));
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#if GTEST_HAS_STREAM_REDIRECTION
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EXPECT_STREQ("Use before def!\n",
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::testing::internal::GetCapturedStderr().c_str());
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#endif
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delete Phi;
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}
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} // namespace
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