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//===- llvm/unittest/CodeGen/GlobalISel/LegalizerInfoTest.cpp -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/GlobalISel/LegalizerInfo.h"
#include "llvm/Target/TargetOpcodes.h"
#include "gtest/gtest.h"
using namespace llvm;
// Define a couple of pretty printers to help debugging when things go wrong.
namespace llvm {
std::ostream &
operator<<(std::ostream &OS, const llvm::LegalizerInfo::LegalizeAction Act) {
switch (Act) {
case LegalizerInfo::Lower: OS << "Lower"; break;
case LegalizerInfo::Legal: OS << "Legal"; break;
case LegalizerInfo::NarrowScalar: OS << "NarrowScalar"; break;
case LegalizerInfo::WidenScalar: OS << "WidenScalar"; break;
case LegalizerInfo::FewerElements: OS << "FewerElements"; break;
case LegalizerInfo::MoreElements: OS << "MoreElements"; break;
case LegalizerInfo::Libcall: OS << "Libcall"; break;
case LegalizerInfo::Custom: OS << "Custom"; break;
case LegalizerInfo::Unsupported: OS << "Unsupported"; break;
case LegalizerInfo::NotFound: OS << "NotFound";
}
return OS;
}
std::ostream &
operator<<(std::ostream &OS, const llvm::LLT Ty) {
std::string Repr;
raw_string_ostream SS{Repr};
Ty.print(SS);
OS << SS.str();
return OS;
}
}
namespace {
TEST(LegalizerInfoTest, ScalarRISC) {
using namespace TargetOpcode;
LegalizerInfo L;
// Typical RISCy set of operations based on AArch64.
for (unsigned Op : {G_ADD, G_SUB}) {
for (unsigned Size : {32, 64})
L.setAction({Op, 0, LLT::scalar(Size)}, LegalizerInfo::Legal);
L.setLegalizeScalarToDifferentSizeStrategy(
Op, 0, LegalizerInfo::widenToLargerTypesAndNarrowToLargest);
}
L.computeTables();
for (unsigned opcode : {G_ADD, G_SUB}) {
// Check we infer the correct types and actually do what we're told.
ASSERT_EQ(L.getAction({opcode, LLT::scalar(8)}),
std::make_pair(LegalizerInfo::WidenScalar, LLT::scalar(32)));
ASSERT_EQ(L.getAction({opcode, LLT::scalar(16)}),
std::make_pair(LegalizerInfo::WidenScalar, LLT::scalar(32)));
ASSERT_EQ(L.getAction({opcode, LLT::scalar(32)}),
std::make_pair(LegalizerInfo::Legal, LLT::scalar(32)));
ASSERT_EQ(L.getAction({opcode, LLT::scalar(64)}),
std::make_pair(LegalizerInfo::Legal, LLT::scalar(64)));
// Make sure the default for over-sized types applies.
ASSERT_EQ(L.getAction({opcode, LLT::scalar(128)}),
std::make_pair(LegalizerInfo::NarrowScalar, LLT::scalar(64)));
// Make sure we also handle unusual sizes
ASSERT_EQ(L.getAction({opcode, LLT::scalar(1)}),
std::make_pair(LegalizerInfo::WidenScalar, LLT::scalar(32)));
ASSERT_EQ(L.getAction({opcode, LLT::scalar(31)}),
std::make_pair(LegalizerInfo::WidenScalar, LLT::scalar(32)));
ASSERT_EQ(L.getAction({opcode, LLT::scalar(33)}),
std::make_pair(LegalizerInfo::WidenScalar, LLT::scalar(64)));
ASSERT_EQ(L.getAction({opcode, LLT::scalar(63)}),
std::make_pair(LegalizerInfo::WidenScalar, LLT::scalar(64)));
ASSERT_EQ(L.getAction({opcode, LLT::scalar(65)}),
std::make_pair(LegalizerInfo::NarrowScalar, LLT::scalar(64)));
}
}
TEST(LegalizerInfoTest, VectorRISC) {
using namespace TargetOpcode;
LegalizerInfo L;
// Typical RISCy set of operations based on ARM.
L.setAction({G_ADD, LLT::vector(8, 8)}, LegalizerInfo::Legal);
L.setAction({G_ADD, LLT::vector(16, 8)}, LegalizerInfo::Legal);
L.setAction({G_ADD, LLT::vector(4, 16)}, LegalizerInfo::Legal);
L.setAction({G_ADD, LLT::vector(8, 16)}, LegalizerInfo::Legal);
L.setAction({G_ADD, LLT::vector(2, 32)}, LegalizerInfo::Legal);
L.setAction({G_ADD, LLT::vector(4, 32)}, LegalizerInfo::Legal);
L.setLegalizeVectorElementToDifferentSizeStrategy(
G_ADD, 0, LegalizerInfo::widenToLargerTypesUnsupportedOtherwise);
L.setAction({G_ADD, 0, LLT::scalar(32)}, LegalizerInfo::Legal);
L.computeTables();
// Check we infer the correct types and actually do what we're told for some
// simple cases.
ASSERT_EQ(L.getAction({G_ADD, LLT::vector(8, 8)}),
std::make_pair(LegalizerInfo::Legal, LLT::vector(8, 8)));
ASSERT_EQ(L.getAction({G_ADD, LLT::vector(8, 7)}),
std::make_pair(LegalizerInfo::WidenScalar, LLT::vector(8, 8)));
ASSERT_EQ(L.getAction({G_ADD, LLT::vector(2, 8)}),
std::make_pair(LegalizerInfo::MoreElements, LLT::vector(8, 8)));
ASSERT_EQ(L.getAction({G_ADD, LLT::vector(8, 32)}),
std::make_pair(LegalizerInfo::FewerElements, LLT::vector(4, 32)));
// Check a few non-power-of-2 sizes:
ASSERT_EQ(L.getAction({G_ADD, LLT::vector(3, 3)}),
std::make_pair(LegalizerInfo::WidenScalar, LLT::vector(3, 8)));
ASSERT_EQ(L.getAction({G_ADD, LLT::vector(3, 8)}),
std::make_pair(LegalizerInfo::MoreElements, LLT::vector(8, 8)));
}
TEST(LegalizerInfoTest, MultipleTypes) {
using namespace TargetOpcode;
LegalizerInfo L;
LLT p0 = LLT::pointer(0, 64);
LLT s64 = LLT::scalar(64);
// Typical RISCy set of operations based on AArch64.
L.setAction({G_PTRTOINT, 0, s64}, LegalizerInfo::Legal);
L.setAction({G_PTRTOINT, 1, p0}, LegalizerInfo::Legal);
L.setLegalizeScalarToDifferentSizeStrategy(
G_PTRTOINT, 0, LegalizerInfo::widenToLargerTypesAndNarrowToLargest);
L.computeTables();
// Check we infer the correct types and actually do what we're told.
ASSERT_EQ(L.getAction({G_PTRTOINT, 0, s64}),
std::make_pair(LegalizerInfo::Legal, s64));
ASSERT_EQ(L.getAction({G_PTRTOINT, 1, p0}),
std::make_pair(LegalizerInfo::Legal, p0));
// Make sure we also handle unusual sizes
ASSERT_EQ(L.getAction({G_PTRTOINT, 0, LLT::scalar(65)}),
std::make_pair(LegalizerInfo::NarrowScalar, s64));
ASSERT_EQ(L.getAction({G_PTRTOINT, 1, LLT::pointer(0, 32)}),
std::make_pair(LegalizerInfo::Unsupported, LLT::pointer(0, 32)));
}
TEST(LegalizerInfoTest, MultipleSteps) {
using namespace TargetOpcode;
LegalizerInfo L;
LLT s32 = LLT::scalar(32);
LLT s64 = LLT::scalar(64);
L.setLegalizeScalarToDifferentSizeStrategy(
G_UREM, 0, LegalizerInfo::widenToLargerTypesUnsupportedOtherwise);
L.setAction({G_UREM, 0, s32}, LegalizerInfo::Lower);
L.setAction({G_UREM, 0, s64}, LegalizerInfo::Lower);
L.computeTables();
ASSERT_EQ(L.getAction({G_UREM, LLT::scalar(16)}),
std::make_pair(LegalizerInfo::WidenScalar, LLT::scalar(32)));
ASSERT_EQ(L.getAction({G_UREM, LLT::scalar(32)}),
std::make_pair(LegalizerInfo::Lower, LLT::scalar(32)));
}
TEST(LegalizerInfoTest, SizeChangeStrategy) {
using namespace TargetOpcode;
LegalizerInfo L;
for (unsigned Size : {1, 8, 16, 32})
L.setAction({G_UREM, 0, LLT::scalar(Size)}, LegalizerInfo::Legal);
L.setLegalizeScalarToDifferentSizeStrategy(
G_UREM, 0, LegalizerInfo::widenToLargerTypesUnsupportedOtherwise);
L.computeTables();
// Check we infer the correct types and actually do what we're told.
for (unsigned Size : {1, 8, 16, 32}) {
ASSERT_EQ(L.getAction({G_UREM, LLT::scalar(Size)}),
std::make_pair(LegalizerInfo::Legal, LLT::scalar(Size)));
}
ASSERT_EQ(L.getAction({G_UREM, LLT::scalar(2)}),
std::make_pair(LegalizerInfo::WidenScalar, LLT::scalar(8)));
ASSERT_EQ(L.getAction({G_UREM, LLT::scalar(7)}),
std::make_pair(LegalizerInfo::WidenScalar, LLT::scalar(8)));
ASSERT_EQ(L.getAction({G_UREM, LLT::scalar(9)}),
std::make_pair(LegalizerInfo::WidenScalar, LLT::scalar(16)));
ASSERT_EQ(L.getAction({G_UREM, LLT::scalar(17)}),
std::make_pair(LegalizerInfo::WidenScalar, LLT::scalar(32)));
ASSERT_EQ(L.getAction({G_UREM, LLT::scalar(31)}),
std::make_pair(LegalizerInfo::WidenScalar, LLT::scalar(32)));
ASSERT_EQ(L.getAction({G_UREM, LLT::scalar(33)}),
std::make_pair(LegalizerInfo::Unsupported, LLT::scalar(33)));
}
}
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