419 lines
14 KiB
C++
419 lines
14 KiB
C++
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//===- llvm/unittest/CodeGen/GlobalISel/LegalizerInfoTest.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 "llvm/CodeGen/GlobalISel/LegalizerInfo.h"
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#include "llvm/CodeGen/TargetOpcodes.h"
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#include "GISelMITest.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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using namespace LegalizeActions;
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// Define a couple of pretty printers to help debugging when things go wrong.
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namespace llvm {
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std::ostream &
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operator<<(std::ostream &OS, const LegalizeAction Act) {
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switch (Act) {
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case Lower: OS << "Lower"; break;
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case Legal: OS << "Legal"; break;
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case NarrowScalar: OS << "NarrowScalar"; break;
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case WidenScalar: OS << "WidenScalar"; break;
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case FewerElements: OS << "FewerElements"; break;
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case MoreElements: OS << "MoreElements"; break;
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case Libcall: OS << "Libcall"; break;
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case Custom: OS << "Custom"; break;
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case Bitcast: OS << "Bitcast"; break;
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case Unsupported: OS << "Unsupported"; break;
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case NotFound: OS << "NotFound"; break;
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case UseLegacyRules: OS << "UseLegacyRules"; break;
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}
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return OS;
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}
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std::ostream &operator<<(std::ostream &OS, const llvm::LegalizeActionStep Ty) {
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OS << "LegalizeActionStep(" << Ty.Action << ", " << Ty.TypeIdx << ", "
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<< Ty.NewType << ')';
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return OS;
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}
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}
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namespace {
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TEST(LegalizerInfoTest, ScalarRISC) {
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using namespace TargetOpcode;
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LegalizerInfo L;
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// Typical RISCy set of operations based on AArch64.
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for (unsigned Op : {G_ADD, G_SUB}) {
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for (unsigned Size : {32, 64})
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L.setAction({Op, 0, LLT::scalar(Size)}, Legal);
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L.setLegalizeScalarToDifferentSizeStrategy(
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Op, 0, LegalizerInfo::widenToLargerTypesAndNarrowToLargest);
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}
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L.computeTables();
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for (unsigned opcode : {G_ADD, G_SUB}) {
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// Check we infer the correct types and actually do what we're told.
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EXPECT_EQ(L.getAction({opcode, {LLT::scalar(8)}}),
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LegalizeActionStep(WidenScalar, 0, LLT::scalar(32)));
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EXPECT_EQ(L.getAction({opcode, {LLT::scalar(16)}}),
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LegalizeActionStep(WidenScalar, 0, LLT::scalar(32)));
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EXPECT_EQ(L.getAction({opcode, {LLT::scalar(32)}}),
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LegalizeActionStep(Legal, 0, LLT{}));
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EXPECT_EQ(L.getAction({opcode, {LLT::scalar(64)}}),
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LegalizeActionStep(Legal, 0, LLT{}));
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// Make sure the default for over-sized types applies.
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EXPECT_EQ(L.getAction({opcode, {LLT::scalar(128)}}),
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LegalizeActionStep(NarrowScalar, 0, LLT::scalar(64)));
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// Make sure we also handle unusual sizes
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EXPECT_EQ(L.getAction({opcode, {LLT::scalar(1)}}),
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LegalizeActionStep(WidenScalar, 0, LLT::scalar(32)));
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EXPECT_EQ(L.getAction({opcode, {LLT::scalar(31)}}),
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LegalizeActionStep(WidenScalar, 0, LLT::scalar(32)));
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EXPECT_EQ(L.getAction({opcode, {LLT::scalar(33)}}),
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LegalizeActionStep(WidenScalar, 0, LLT::scalar(64)));
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EXPECT_EQ(L.getAction({opcode, {LLT::scalar(63)}}),
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LegalizeActionStep(WidenScalar, 0, LLT::scalar(64)));
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EXPECT_EQ(L.getAction({opcode, {LLT::scalar(65)}}),
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LegalizeActionStep(NarrowScalar, 0, LLT::scalar(64)));
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}
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}
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TEST(LegalizerInfoTest, VectorRISC) {
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using namespace TargetOpcode;
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LegalizerInfo L;
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// Typical RISCy set of operations based on ARM.
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L.setAction({G_ADD, LLT::vector(8, 8)}, Legal);
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L.setAction({G_ADD, LLT::vector(16, 8)}, Legal);
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L.setAction({G_ADD, LLT::vector(4, 16)}, Legal);
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L.setAction({G_ADD, LLT::vector(8, 16)}, Legal);
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L.setAction({G_ADD, LLT::vector(2, 32)}, Legal);
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L.setAction({G_ADD, LLT::vector(4, 32)}, Legal);
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L.setLegalizeVectorElementToDifferentSizeStrategy(
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G_ADD, 0, LegalizerInfo::widenToLargerTypesUnsupportedOtherwise);
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L.setAction({G_ADD, 0, LLT::scalar(32)}, Legal);
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L.computeTables();
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// Check we infer the correct types and actually do what we're told for some
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// simple cases.
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EXPECT_EQ(L.getAction({G_ADD, {LLT::vector(8, 8)}}),
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LegalizeActionStep(Legal, 0, LLT{}));
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EXPECT_EQ(L.getAction({G_ADD, {LLT::vector(8, 7)}}),
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LegalizeActionStep(WidenScalar, 0, LLT::vector(8, 8)));
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EXPECT_EQ(L.getAction({G_ADD, {LLT::vector(2, 8)}}),
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LegalizeActionStep(MoreElements, 0, LLT::vector(8, 8)));
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EXPECT_EQ(L.getAction({G_ADD, {LLT::vector(8, 32)}}),
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LegalizeActionStep(FewerElements, 0, LLT::vector(4, 32)));
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// Check a few non-power-of-2 sizes:
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EXPECT_EQ(L.getAction({G_ADD, {LLT::vector(3, 3)}}),
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LegalizeActionStep(WidenScalar, 0, LLT::vector(3, 8)));
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EXPECT_EQ(L.getAction({G_ADD, {LLT::vector(3, 8)}}),
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LegalizeActionStep(MoreElements, 0, LLT::vector(8, 8)));
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}
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TEST(LegalizerInfoTest, MultipleTypes) {
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using namespace TargetOpcode;
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LegalizerInfo L;
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LLT p0 = LLT::pointer(0, 64);
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LLT s64 = LLT::scalar(64);
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// Typical RISCy set of operations based on AArch64.
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L.setAction({G_PTRTOINT, 0, s64}, Legal);
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L.setAction({G_PTRTOINT, 1, p0}, Legal);
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L.setLegalizeScalarToDifferentSizeStrategy(
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G_PTRTOINT, 0, LegalizerInfo::widenToLargerTypesAndNarrowToLargest);
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L.computeTables();
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// Check we infer the correct types and actually do what we're told.
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EXPECT_EQ(L.getAction({G_PTRTOINT, {s64, p0}}),
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LegalizeActionStep(Legal, 0, LLT{}));
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// Make sure we also handle unusual sizes
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EXPECT_EQ(
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L.getAction({G_PTRTOINT, {LLT::scalar(65), s64}}),
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LegalizeActionStep(NarrowScalar, 0, s64));
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EXPECT_EQ(
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L.getAction({G_PTRTOINT, {s64, LLT::pointer(0, 32)}}),
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LegalizeActionStep(Unsupported, 1, LLT::pointer(0, 32)));
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}
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TEST(LegalizerInfoTest, MultipleSteps) {
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using namespace TargetOpcode;
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LegalizerInfo L;
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LLT s32 = LLT::scalar(32);
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LLT s64 = LLT::scalar(64);
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L.setLegalizeScalarToDifferentSizeStrategy(
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G_UREM, 0, LegalizerInfo::widenToLargerTypesUnsupportedOtherwise);
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L.setAction({G_UREM, 0, s32}, Lower);
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L.setAction({G_UREM, 0, s64}, Lower);
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L.computeTables();
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EXPECT_EQ(L.getAction({G_UREM, {LLT::scalar(16)}}),
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LegalizeActionStep(WidenScalar, 0, LLT::scalar(32)));
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EXPECT_EQ(L.getAction({G_UREM, {LLT::scalar(32)}}),
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LegalizeActionStep(Lower, 0, LLT::scalar(32)));
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}
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TEST(LegalizerInfoTest, SizeChangeStrategy) {
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using namespace TargetOpcode;
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LegalizerInfo L;
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for (unsigned Size : {1, 8, 16, 32})
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L.setAction({G_UREM, 0, LLT::scalar(Size)}, Legal);
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L.setLegalizeScalarToDifferentSizeStrategy(
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G_UREM, 0, LegalizerInfo::widenToLargerTypesUnsupportedOtherwise);
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L.computeTables();
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// Check we infer the correct types and actually do what we're told.
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for (unsigned Size : {1, 8, 16, 32}) {
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EXPECT_EQ(L.getAction({G_UREM, {LLT::scalar(Size)}}),
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LegalizeActionStep(Legal, 0, LLT{}));
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}
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EXPECT_EQ(L.getAction({G_UREM, {LLT::scalar(2)}}),
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LegalizeActionStep(WidenScalar, 0, LLT::scalar(8)));
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EXPECT_EQ(L.getAction({G_UREM, {LLT::scalar(7)}}),
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LegalizeActionStep(WidenScalar, 0, LLT::scalar(8)));
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EXPECT_EQ(L.getAction({G_UREM, {LLT::scalar(9)}}),
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LegalizeActionStep(WidenScalar, 0, LLT::scalar(16)));
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EXPECT_EQ(L.getAction({G_UREM, {LLT::scalar(17)}}),
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LegalizeActionStep(WidenScalar, 0, LLT::scalar(32)));
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EXPECT_EQ(L.getAction({G_UREM, {LLT::scalar(31)}}),
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LegalizeActionStep(WidenScalar, 0, LLT::scalar(32)));
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EXPECT_EQ(L.getAction({G_UREM, {LLT::scalar(33)}}),
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LegalizeActionStep(Unsupported, 0, LLT::scalar(33)));
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}
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}
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#define EXPECT_ACTION(Action, Index, Type, Query) \
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do { \
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auto A = LI.getAction(Query); \
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EXPECT_EQ(LegalizeActionStep(Action, Index, Type), A) << A; \
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} while (0)
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TEST(LegalizerInfoTest, RuleSets) {
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using namespace TargetOpcode;
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const LLT s5 = LLT::scalar(5);
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const LLT s8 = LLT::scalar(8);
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const LLT s16 = LLT::scalar(16);
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const LLT s32 = LLT::scalar(32);
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const LLT s33 = LLT::scalar(33);
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const LLT s64 = LLT::scalar(64);
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const LLT v2s5 = LLT::vector(2, 5);
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const LLT v2s8 = LLT::vector(2, 8);
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const LLT v2s16 = LLT::vector(2, 16);
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const LLT v2s32 = LLT::vector(2, 32);
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const LLT v3s32 = LLT::vector(3, 32);
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const LLT v4s32 = LLT::vector(4, 32);
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const LLT v2s33 = LLT::vector(2, 33);
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const LLT v2s64 = LLT::vector(2, 64);
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const LLT p0 = LLT::pointer(0, 32);
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const LLT v3p0 = LLT::vector(3, p0);
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const LLT v4p0 = LLT::vector(4, p0);
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{
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LegalizerInfo LI;
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LI.getActionDefinitionsBuilder(G_IMPLICIT_DEF)
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.legalFor({v4s32, v4p0})
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.moreElementsToNextPow2(0);
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LI.computeTables();
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EXPECT_ACTION(Unsupported, 0, LLT(), LegalityQuery(G_IMPLICIT_DEF, {s32}));
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EXPECT_ACTION(Unsupported, 0, LLT(), LegalityQuery(G_IMPLICIT_DEF, {v2s32}));
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EXPECT_ACTION(MoreElements, 0, v4p0, LegalityQuery(G_IMPLICIT_DEF, {v3p0}));
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EXPECT_ACTION(MoreElements, 0, v4s32, LegalityQuery(G_IMPLICIT_DEF, {v3s32}));
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}
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// Test minScalarOrElt
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{
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LegalizerInfo LI;
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LI.getActionDefinitionsBuilder(G_OR)
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.legalFor({s32})
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.minScalarOrElt(0, s32);
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LI.computeTables();
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EXPECT_ACTION(WidenScalar, 0, s32, LegalityQuery(G_OR, {s16}));
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EXPECT_ACTION(WidenScalar, 0, v2s32, LegalityQuery(G_OR, {v2s16}));
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}
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// Test maxScalarOrELt
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{
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LegalizerInfo LI;
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LI.getActionDefinitionsBuilder(G_AND)
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.legalFor({s16})
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.maxScalarOrElt(0, s16);
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LI.computeTables();
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EXPECT_ACTION(NarrowScalar, 0, s16, LegalityQuery(G_AND, {s32}));
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EXPECT_ACTION(NarrowScalar, 0, v2s16, LegalityQuery(G_AND, {v2s32}));
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}
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// Test clampScalarOrElt
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{
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LegalizerInfo LI;
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LI.getActionDefinitionsBuilder(G_XOR)
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.legalFor({s16})
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.clampScalarOrElt(0, s16, s32);
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LI.computeTables();
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EXPECT_ACTION(NarrowScalar, 0, s32, LegalityQuery(G_XOR, {s64}));
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EXPECT_ACTION(WidenScalar, 0, s16, LegalityQuery(G_XOR, {s8}));
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// Make sure the number of elements is preserved.
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EXPECT_ACTION(NarrowScalar, 0, v2s32, LegalityQuery(G_XOR, {v2s64}));
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EXPECT_ACTION(WidenScalar, 0, v2s16, LegalityQuery(G_XOR, {v2s8}));
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}
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// Test minScalar
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{
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LegalizerInfo LI;
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LI.getActionDefinitionsBuilder(G_OR)
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.legalFor({s32})
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.minScalar(0, s32);
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LI.computeTables();
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// Only handle scalars, ignore vectors.
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EXPECT_ACTION(WidenScalar, 0, s32, LegalityQuery(G_OR, {s16}));
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EXPECT_ACTION(Unsupported, 0, LLT(), LegalityQuery(G_OR, {v2s16}));
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}
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// Test maxScalar
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{
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LegalizerInfo LI;
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LI.getActionDefinitionsBuilder(G_AND)
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.legalFor({s16})
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.maxScalar(0, s16);
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LI.computeTables();
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// Only handle scalars, ignore vectors.
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EXPECT_ACTION(NarrowScalar, 0, s16, LegalityQuery(G_AND, {s32}));
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EXPECT_ACTION(Unsupported, 0, LLT(), LegalityQuery(G_AND, {v2s32}));
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}
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// Test clampScalar
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{
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LegalizerInfo LI;
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LI.getActionDefinitionsBuilder(G_XOR)
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.legalFor({s16})
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.clampScalar(0, s16, s32);
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LI.computeTables();
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EXPECT_ACTION(NarrowScalar, 0, s32, LegalityQuery(G_XOR, {s64}));
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EXPECT_ACTION(WidenScalar, 0, s16, LegalityQuery(G_XOR, {s8}));
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// Only handle scalars, ignore vectors.
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EXPECT_ACTION(Unsupported, 0, LLT(), LegalityQuery(G_XOR, {v2s64}));
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EXPECT_ACTION(Unsupported, 0, LLT(), LegalityQuery(G_XOR, {v2s8}));
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}
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|
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// Test widenScalarOrEltToNextPow2
|
||
|
|
{
|
||
|
|
LegalizerInfo LI;
|
||
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|
|
||
|
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LI.getActionDefinitionsBuilder(G_AND)
|
||
|
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.legalFor({s32})
|
||
|
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.widenScalarOrEltToNextPow2(0, 32);
|
||
|
|
LI.computeTables();
|
||
|
|
|
||
|
|
// Handle scalars and vectors
|
||
|
|
EXPECT_ACTION(WidenScalar, 0, s32, LegalityQuery(G_AND, {s5}));
|
||
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EXPECT_ACTION(WidenScalar, 0, v2s32, LegalityQuery(G_AND, {v2s5}));
|
||
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EXPECT_ACTION(WidenScalar, 0, s64, LegalityQuery(G_AND, {s33}));
|
||
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EXPECT_ACTION(WidenScalar, 0, v2s64, LegalityQuery(G_AND, {v2s33}));
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test widenScalarToNextPow2
|
||
|
|
{
|
||
|
|
LegalizerInfo LI;
|
||
|
|
|
||
|
|
LI.getActionDefinitionsBuilder(G_AND)
|
||
|
|
.legalFor({s32})
|
||
|
|
.widenScalarToNextPow2(0, 32);
|
||
|
|
LI.computeTables();
|
||
|
|
|
||
|
|
EXPECT_ACTION(WidenScalar, 0, s32, LegalityQuery(G_AND, {s5}));
|
||
|
|
EXPECT_ACTION(WidenScalar, 0, s64, LegalityQuery(G_AND, {s33}));
|
||
|
|
|
||
|
|
// Do nothing for vectors.
|
||
|
|
EXPECT_ACTION(Unsupported, 0, LLT(), LegalityQuery(G_AND, {v2s5}));
|
||
|
|
EXPECT_ACTION(Unsupported, 0, LLT(), LegalityQuery(G_AND, {v2s33}));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(LegalizerInfoTest, MMOAlignment) {
|
||
|
|
using namespace TargetOpcode;
|
||
|
|
|
||
|
|
const LLT s32 = LLT::scalar(32);
|
||
|
|
const LLT p0 = LLT::pointer(0, 64);
|
||
|
|
|
||
|
|
{
|
||
|
|
LegalizerInfo LI;
|
||
|
|
LI.getActionDefinitionsBuilder(G_LOAD)
|
||
|
|
.legalForTypesWithMemDesc({{s32, p0, 32, 32}});
|
||
|
|
|
||
|
|
LI.computeTables();
|
||
|
|
|
||
|
|
EXPECT_ACTION(Legal, 0, LLT(),
|
||
|
|
LegalityQuery(G_LOAD, {s32, p0},
|
||
|
|
LegalityQuery::MemDesc{
|
||
|
|
32, 32, AtomicOrdering::NotAtomic}));
|
||
|
|
EXPECT_ACTION(Unsupported, 0, LLT(),
|
||
|
|
LegalityQuery(G_LOAD, {s32, p0},
|
||
|
|
LegalityQuery::MemDesc{
|
||
|
|
32, 16, AtomicOrdering::NotAtomic }));
|
||
|
|
EXPECT_ACTION(Unsupported, 0, LLT(),
|
||
|
|
LegalityQuery(G_LOAD, {s32, p0},
|
||
|
|
LegalityQuery::MemDesc{
|
||
|
|
32, 8, AtomicOrdering::NotAtomic}));
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test that the maximum supported alignment value isn't truncated
|
||
|
|
{
|
||
|
|
// Maximum IR defined alignment in bytes.
|
||
|
|
const uint64_t MaxAlignment = UINT64_C(1) << 29;
|
||
|
|
const uint64_t MaxAlignInBits = 8 * MaxAlignment;
|
||
|
|
LegalizerInfo LI;
|
||
|
|
LI.getActionDefinitionsBuilder(G_LOAD)
|
||
|
|
.legalForTypesWithMemDesc({{s32, p0, 32, MaxAlignInBits}});
|
||
|
|
|
||
|
|
LI.computeTables();
|
||
|
|
|
||
|
|
EXPECT_ACTION(Legal, 0, LLT(),
|
||
|
|
LegalityQuery(G_LOAD, {s32, p0},
|
||
|
|
LegalityQuery::MemDesc{32,
|
||
|
|
MaxAlignInBits, AtomicOrdering::NotAtomic}));
|
||
|
|
EXPECT_ACTION(Unsupported, 0, LLT(),
|
||
|
|
LegalityQuery(G_LOAD, {s32, p0},
|
||
|
|
LegalityQuery::MemDesc{
|
||
|
|
32, 8, AtomicOrdering::NotAtomic }));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// This code sequence doesn't do anything, but it covers a previously uncovered
|
||
|
|
// codepath that used to crash in MSVC x86_32 debug mode.
|
||
|
|
TEST(LegalizerInfoTest, MSVCDebugMiscompile) {
|
||
|
|
const LLT S1 = LLT::scalar(1);
|
||
|
|
const LLT P0 = LLT::pointer(0, 32);
|
||
|
|
LegalizerInfo LI;
|
||
|
|
auto Builder = LI.getActionDefinitionsBuilder(TargetOpcode::G_PTRTOINT);
|
||
|
|
(void)Builder.legalForCartesianProduct({S1}, {P0});
|
||
|
|
}
|