blob: 2776f75fe1af4b785f7df148577750016dc47d64 [file] [log] [blame]
//===- LegalizerHelperTest.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 "GISelMITest.h"
using namespace LegalizeActions;
using namespace LegalizeMutations;
using namespace LegalityPredicates;
namespace {
class DummyGISelObserver : public GISelChangeObserver {
public:
void changingInstr(MachineInstr &MI) override {}
void changedInstr(MachineInstr &MI) override {}
void createdInstr(MachineInstr &MI) override {}
void erasingInstr(MachineInstr &MI) override {}
};
// Test CTTZ expansion when CTTZ_ZERO_UNDEF is legal or custom,
// in which case it becomes CTTZ_ZERO_UNDEF with select.
TEST_F(GISelMITest, LowerBitCountingCTTZ0) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_CTTZ_ZERO_UNDEF).legalFor({{s64, s64}});
});
// Build Instr
auto MIBCTTZ =
B.buildInstr(TargetOpcode::G_CTTZ, {LLT::scalar(64)}, {Copies[0]});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
// Perform Legalization
EXPECT_TRUE(Helper.lower(*MIBCTTZ, 0, LLT::scalar(64)) ==
LegalizerHelper::LegalizeResult::Legalized);
auto CheckStr = R"(
CHECK: [[CZU:%[0-9]+]]:_(s64) = G_CTTZ_ZERO_UNDEF %0
CHECK: [[ZERO:%[0-9]+]]:_(s64) = G_CONSTANT i64 0
CHECK: [[SIXTY4:%[0-9]+]]:_(s64) = G_CONSTANT i64 64
CHECK: [[CMP:%[0-9]+]]:_(s1) = G_ICMP intpred(eq), %0:_(s64), [[ZERO]]
CHECK: [[SEL:%[0-9]+]]:_(s64) = G_SELECT [[CMP]]:_(s1), [[SIXTY4]]:_, [[CZU]]
)";
// Check
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
// CTTZ expansion in terms of CTLZ
TEST_F(GISelMITest, LowerBitCountingCTTZ1) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_CTLZ).legalFor({{s64, s64}});
});
// Build Instr
auto MIBCTTZ =
B.buildInstr(TargetOpcode::G_CTTZ, {LLT::scalar(64)}, {Copies[0]});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
// Perform Legalization
EXPECT_TRUE(Helper.lower(*MIBCTTZ, 0, LLT::scalar(64)) ==
LegalizerHelper::LegalizeResult::Legalized);
auto CheckStr = R"(
CHECK: [[NEG1:%[0-9]+]]:_(s64) = G_CONSTANT i64 -1
CHECK: [[NOT:%[0-9]+]]:_(s64) = G_XOR %0:_, [[NEG1]]
CHECK: [[SUB1:%[0-9]+]]:_(s64) = G_ADD %0:_, [[NEG1]]
CHECK: [[AND1:%[0-9]+]]:_(s64) = G_AND [[NOT]]:_, [[SUB1]]:_
CHECK: [[CST64:%[0-9]+]]:_(s64) = G_CONSTANT i64 64
CHECK: [[CTLZ:%[0-9]+]]:_(s64) = G_CTLZ [[AND1]]:_
CHECK: G_SUB [[CST64]]:_, [[CTLZ]]:_
)";
// Check
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
// CTTZ expansion in terms of CTPOP
TEST_F(GISelMITest, LowerBitCountingCTTZ2) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_CTPOP).legalFor({{s64, s64}});
});
// Build
auto MIBCTTZ =
B.buildInstr(TargetOpcode::G_CTTZ, {LLT::scalar(64)}, {Copies[0]});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
EXPECT_TRUE(Helper.lower(*MIBCTTZ, 0, LLT::scalar(64)) ==
LegalizerHelper::LegalizeResult::Legalized);
auto CheckStr = R"(
CHECK: [[NEG1:%[0-9]+]]:_(s64) = G_CONSTANT i64 -1
CHECK: [[NOT:%[0-9]+]]:_(s64) = G_XOR %0:_, [[NEG1]]
CHECK: [[SUB1:%[0-9]+]]:_(s64) = G_ADD %0:_, [[NEG1]]
CHECK: [[AND1:%[0-9]+]]:_(s64) = G_AND [[NOT]]:_, [[SUB1]]:_
CHECK: [[POP:%[0-9]+]]:_(s64) = G_CTPOP [[AND1]]
)";
// Check
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
// CTPOP widening.
TEST_F(GISelMITest, WidenBitCountingCTPOP1) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_CTPOP).legalFor({{s16, s16}});
});
// Build
// Trunc it to s8.
LLT s8{LLT::scalar(8)};
LLT s16{LLT::scalar(16)};
auto MIBTrunc = B.buildTrunc(s8, Copies[0]);
auto MIBCTPOP = B.buildInstr(TargetOpcode::G_CTPOP, {s16}, {MIBTrunc});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.widenScalar(*MIBCTPOP, 1, s16));
auto CheckStr = R"(
CHECK: [[TRUNC:%[0-9]+]]:_(s8) = G_TRUNC %0:_(s64)
CHECK: [[ZEXT:%[0-9]+]]:_(s16) = G_ZEXT [[TRUNC]]:_(s8)
CHECK: [[CTPOP:%[0-9]+]]:_(s16) = G_CTPOP [[ZEXT]]
CHECK: [[COPY:%[0-9]+]]:_(s16) = COPY [[CTPOP]]:_(s16)
)";
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
// Test a strange case where the result is wider than the source
TEST_F(GISelMITest, WidenBitCountingCTPOP2) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_CTPOP).legalFor({{s32, s16}});
});
// Build
// Trunc it to s8.
LLT s8{LLT::scalar(8)};
LLT s16{LLT::scalar(16)};
LLT s32{LLT::scalar(32)};
auto MIBTrunc = B.buildTrunc(s8, Copies[0]);
auto MIBCTPOP = B.buildInstr(TargetOpcode::G_CTPOP, {s32}, {MIBTrunc});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.widenScalar(*MIBCTPOP, 1, s16));
auto CheckStr = R"(
CHECK: [[TRUNC:%[0-9]+]]:_(s8) = G_TRUNC %0:_(s64)
CHECK: [[ZEXT:%[0-9]+]]:_(s16) = G_ZEXT [[TRUNC]]:_(s8)
CHECK: [[CTPOP:%[0-9]+]]:_(s16) = G_CTPOP [[ZEXT]]
CHECK: [[COPY:%[0-9]+]]:_(s32) = G_ZEXT [[CTPOP]]:_(s16)
)";
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
// CTTZ_ZERO_UNDEF expansion in terms of CTTZ
TEST_F(GISelMITest, LowerBitCountingCTTZ3) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_CTTZ).legalFor({{s64, s64}});
});
// Build
auto MIBCTTZ = B.buildInstr(TargetOpcode::G_CTTZ_ZERO_UNDEF,
{LLT::scalar(64)}, {Copies[0]});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
EXPECT_TRUE(Helper.lower(*MIBCTTZ, 0, LLT::scalar(64)) ==
LegalizerHelper::LegalizeResult::Legalized);
auto CheckStr = R"(
CHECK: CTTZ
)";
// Check
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
// CTLZ expansion in terms of CTLZ_ZERO_UNDEF
TEST_F(GISelMITest, LowerBitCountingCTLZ0) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_CTLZ_ZERO_UNDEF).legalFor({{s64, s64}});
});
// Build
auto MIBCTLZ =
B.buildInstr(TargetOpcode::G_CTLZ, {LLT::scalar(64)}, {Copies[0]});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
EXPECT_TRUE(Helper.lower(*MIBCTLZ, 0, LLT::scalar(64)) ==
LegalizerHelper::LegalizeResult::Legalized);
auto CheckStr = R"(
CHECK: [[CZU:%[0-9]+]]:_(s64) = G_CTLZ_ZERO_UNDEF %0
CHECK: [[ZERO:%[0-9]+]]:_(s64) = G_CONSTANT i64 0
CHECK: [[SIXTY4:%[0-9]+]]:_(s64) = G_CONSTANT i64 64
CHECK: [[CMP:%[0-9]+]]:_(s1) = G_ICMP intpred(eq), %0:_(s64), [[ZERO]]
CHECK: [[SEL:%[0-9]+]]:_(s64) = G_SELECT [[CMP]]:_(s1), [[SIXTY4]]:_, [[CZU]]
)";
// Check
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
// CTLZ expansion in terms of CTLZ_ZERO_UNDEF if the latter is a libcall
TEST_F(GISelMITest, LowerBitCountingCTLZLibcall) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_CTLZ_ZERO_UNDEF).libcallFor({{s64, s64}});
});
// Build
auto MIBCTLZ =
B.buildInstr(TargetOpcode::G_CTLZ, {LLT::scalar(64)}, {Copies[0]});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
EXPECT_TRUE(Helper.lower(*MIBCTLZ, 0, LLT::scalar(64)) ==
LegalizerHelper::LegalizeResult::Legalized);
auto CheckStr = R"(
CHECK: [[CZU:%[0-9]+]]:_(s64) = G_CTLZ_ZERO_UNDEF %0
CHECK: [[ZERO:%[0-9]+]]:_(s64) = G_CONSTANT i64 0
CHECK: [[THIRTY2:%[0-9]+]]:_(s64) = G_CONSTANT i64 64
CHECK: [[CMP:%[0-9]+]]:_(s1) = G_ICMP intpred(eq), %0:_(s64), [[ZERO]]
CHECK: [[SEL:%[0-9]+]]:_(s64) = G_SELECT [[CMP]]:_(s1), [[THIRTY2]]:_, [[CZU]]
)";
// Check
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
// CTLZ expansion
TEST_F(GISelMITest, LowerBitCountingCTLZ1) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_CTPOP).legalFor({{s8, s8}});
});
// Build
// Trunc it to s8.
LLT s8{LLT::scalar(8)};
auto MIBTrunc = B.buildTrunc(s8, Copies[0]);
auto MIBCTLZ = B.buildInstr(TargetOpcode::G_CTLZ, {s8}, {MIBTrunc});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
EXPECT_TRUE(Helper.lower(*MIBCTLZ, 0, s8) ==
LegalizerHelper::LegalizeResult::Legalized);
auto CheckStr = R"(
CHECK: [[Trunc:%[0-9]+]]:_(s8) = G_TRUNC
CHECK: [[Cst1:%[0-9]+]]:_(s8) = G_CONSTANT i8 1
CHECK: [[Sh1:%[0-9]+]]:_(s8) = G_LSHR [[Trunc]]:_, [[Cst1]]:_
CHECK: [[Or1:%[0-9]+]]:_(s8) = G_OR [[Trunc]]:_, [[Sh1]]:_
CHECK: [[Cst2:%[0-9]+]]:_(s8) = G_CONSTANT i8 2
CHECK: [[Sh2:%[0-9]+]]:_(s8) = G_LSHR [[Or1]]:_, [[Cst2]]:_
CHECK: [[Or2:%[0-9]+]]:_(s8) = G_OR [[Or1]]:_, [[Sh2]]:_
CHECK: [[Cst4:%[0-9]+]]:_(s8) = G_CONSTANT i8 4
CHECK: [[Sh4:%[0-9]+]]:_(s8) = G_LSHR [[Or2]]:_, [[Cst4]]:_
CHECK: [[Or4:%[0-9]+]]:_(s8) = G_OR [[Or2]]:_, [[Sh4]]:_
CHECK: [[CTPOP:%[0-9]+]]:_(s8) = G_CTPOP [[Or4]]:_
CHECK: [[Len:%[0-9]+]]:_(s8) = G_CONSTANT i8 8
CHECK: [[Sub:%[0-9]+]]:_(s8) = G_SUB [[Len]]:_, [[CTPOP]]:_
)";
// Check
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
// CTLZ widening.
TEST_F(GISelMITest, WidenBitCountingCTLZ) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_CTLZ).legalFor({{s16, s16}});
});
// Build
// Trunc it to s8.
LLT s8{LLT::scalar(8)};
LLT s16{LLT::scalar(16)};
auto MIBTrunc = B.buildTrunc(s8, Copies[0]);
auto MIBCTLZ = B.buildInstr(TargetOpcode::G_CTLZ, {s8}, {MIBTrunc});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
EXPECT_TRUE(Helper.widenScalar(*MIBCTLZ, 1, s16) ==
LegalizerHelper::LegalizeResult::Legalized);
auto CheckStr = R"(
CHECK: [[Trunc:%[0-9]+]]:_(s8) = G_TRUNC
CHECK: [[Zext:%[0-9]+]]:_(s16) = G_ZEXT [[Trunc]]
CHECK: [[Ctlz:%[0-9]+]]:_(s16) = G_CTLZ [[Zext]]
CHECK: [[Cst8:%[0-9]+]]:_(s16) = G_CONSTANT i16 8
CHECK: [[Sub:%[0-9]+]]:_(s16) = G_SUB [[Ctlz]]:_, [[Cst8]]:_
CHECK: [[Trunc:%[0-9]+]]:_(s8) = G_TRUNC [[Sub]]
)";
// Check
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
// CTLZ_ZERO_UNDEF widening.
TEST_F(GISelMITest, WidenBitCountingCTLZZeroUndef) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_CTLZ_ZERO_UNDEF).legalFor({{s16, s16}});
});
// Build
// Trunc it to s8.
LLT s8{LLT::scalar(8)};
LLT s16{LLT::scalar(16)};
auto MIBTrunc = B.buildTrunc(s8, Copies[0]);
auto MIBCTLZ_ZU =
B.buildInstr(TargetOpcode::G_CTLZ_ZERO_UNDEF, {s8}, {MIBTrunc});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
EXPECT_TRUE(Helper.widenScalar(*MIBCTLZ_ZU, 1, s16) ==
LegalizerHelper::LegalizeResult::Legalized);
auto CheckStr = R"(
CHECK: [[Trunc:%[0-9]+]]:_(s8) = G_TRUNC
CHECK: [[Zext:%[0-9]+]]:_(s16) = G_ZEXT [[Trunc]]
CHECK: [[CtlzZu:%[0-9]+]]:_(s16) = G_CTLZ_ZERO_UNDEF [[Zext]]
CHECK: [[Cst8:%[0-9]+]]:_(s16) = G_CONSTANT i16 8
CHECK: [[Sub:%[0-9]+]]:_(s16) = G_SUB [[CtlzZu]]:_, [[Cst8]]:_
CHECK: [[Trunc:%[0-9]+]]:_(s8) = G_TRUNC [[Sub]]
)";
// Check
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
// CTPOP widening.
TEST_F(GISelMITest, WidenBitCountingCTPOP) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_CTPOP).legalFor({{s16, s16}});
});
// Build
// Trunc it to s8.
LLT s8{LLT::scalar(8)};
LLT s16{LLT::scalar(16)};
auto MIBTrunc = B.buildTrunc(s8, Copies[0]);
auto MIBCTPOP = B.buildInstr(TargetOpcode::G_CTPOP, {s8}, {MIBTrunc});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
EXPECT_TRUE(Helper.widenScalar(*MIBCTPOP, 1, s16) ==
LegalizerHelper::LegalizeResult::Legalized);
auto CheckStr = R"(
CHECK: [[Trunc:%[0-9]+]]:_(s8) = G_TRUNC
CHECK: [[Zext:%[0-9]+]]:_(s16) = G_ZEXT [[Trunc]]
CHECK: [[Ctpop:%[0-9]+]]:_(s16) = G_CTPOP [[Zext]]
CHECK: [[Trunc:%[0-9]+]]:_(s8) = G_TRUNC [[Ctpop]]
)";
// Check
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
// CTTZ_ZERO_UNDEF widening.
TEST_F(GISelMITest, WidenBitCountingCTTZ_ZERO_UNDEF) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_CTTZ_ZERO_UNDEF).legalFor({{s16, s16}});
});
// Build
// Trunc it to s8.
LLT s8{LLT::scalar(8)};
LLT s16{LLT::scalar(16)};
auto MIBTrunc = B.buildTrunc(s8, Copies[0]);
auto MIBCTTZ_ZERO_UNDEF =
B.buildInstr(TargetOpcode::G_CTTZ_ZERO_UNDEF, {s8}, {MIBTrunc});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
EXPECT_TRUE(Helper.widenScalar(*MIBCTTZ_ZERO_UNDEF, 1, s16) ==
LegalizerHelper::LegalizeResult::Legalized);
auto CheckStr = R"(
CHECK: [[Trunc:%[0-9]+]]:_(s8) = G_TRUNC
CHECK: [[Zext:%[0-9]+]]:_(s16) = G_ZEXT [[Trunc]]
CHECK: [[CttzZu:%[0-9]+]]:_(s16) = G_CTTZ_ZERO_UNDEF [[Zext]]
CHECK: [[Trunc:%[0-9]+]]:_(s8) = G_TRUNC [[CttzZu]]
)";
// Check
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
// CTTZ widening.
TEST_F(GISelMITest, WidenBitCountingCTTZ) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_CTTZ).legalFor({{s16, s16}});
});
// Build
// Trunc it to s8.
LLT s8{LLT::scalar(8)};
LLT s16{LLT::scalar(16)};
auto MIBTrunc = B.buildTrunc(s8, Copies[0]);
auto MIBCTTZ = B.buildInstr(TargetOpcode::G_CTTZ, {s8}, {MIBTrunc});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
EXPECT_TRUE(Helper.widenScalar(*MIBCTTZ, 1, s16) ==
LegalizerHelper::LegalizeResult::Legalized);
auto CheckStr = R"(
CHECK: [[Trunc:%[0-9]+]]:_(s8) = G_TRUNC
CHECK: [[Zext:%[0-9]+]]:_(s16) = G_ZEXT [[Trunc]]
CHECK: [[Cst:%[0-9]+]]:_(s16) = G_CONSTANT i16 256
CHECK: [[Or:%[0-9]+]]:_(s16) = G_OR [[Zext]]:_, [[Cst]]
CHECK: [[Cttz:%[0-9]+]]:_(s16) = G_CTTZ [[Or]]
CHECK: [[Trunc:%[0-9]+]]:_(s8) = G_TRUNC [[Cttz]]
)";
// Check
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
// UADDO widening.
TEST_F(GISelMITest, WidenUADDO) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_ADD).legalFor({{s16, s16}});
});
// Build
// Trunc it to s8.
LLT s8{LLT::scalar(8)};
LLT s16{LLT::scalar(16)};
auto MIBTrunc = B.buildTrunc(s8, Copies[0]);
unsigned CarryReg = MRI->createGenericVirtualRegister(LLT::scalar(1));
auto MIBUAddO =
B.buildInstr(TargetOpcode::G_UADDO, {s8, CarryReg}, {MIBTrunc, MIBTrunc});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
EXPECT_TRUE(Helper.widenScalar(*MIBUAddO, 0, s16) ==
LegalizerHelper::LegalizeResult::Legalized);
auto CheckStr = R"(
CHECK: [[Trunc:%[0-9]+]]:_(s8) = G_TRUNC
CHECK: [[LHS:%[0-9]+]]:_(s16) = G_ZEXT [[Trunc]]
CHECK: [[RHS:%[0-9]+]]:_(s16) = G_ZEXT [[Trunc]]
CHECK: [[ADD:%[0-9]+]]:_(s16) = G_ADD [[LHS]]:_, [[RHS]]:_
CHECK: [[CST:%[0-9]+]]:_(s16) = G_CONSTANT i16 255
CHECK: [[AND:%[0-9]+]]:_(s16) = G_AND [[ADD]]:_, [[CST]]:_
CHECK: G_ICMP intpred(ne), [[ADD]]:_(s16), [[AND]]:_
CHECK: G_TRUNC [[ADD]]
)";
// Check
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
// USUBO widening.
TEST_F(GISelMITest, WidenUSUBO) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_SUB).legalFor({{s16, s16}});
});
// Build
// Trunc it to s8.
LLT s8{LLT::scalar(8)};
LLT s16{LLT::scalar(16)};
auto MIBTrunc = B.buildTrunc(s8, Copies[0]);
unsigned CarryReg = MRI->createGenericVirtualRegister(LLT::scalar(1));
auto MIBUSUBO =
B.buildInstr(TargetOpcode::G_USUBO, {s8, CarryReg}, {MIBTrunc, MIBTrunc});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
EXPECT_TRUE(Helper.widenScalar(*MIBUSUBO, 0, s16) ==
LegalizerHelper::LegalizeResult::Legalized);
auto CheckStr = R"(
CHECK: [[Trunc:%[0-9]+]]:_(s8) = G_TRUNC
CHECK: [[LHS:%[0-9]+]]:_(s16) = G_ZEXT [[Trunc]]
CHECK: [[RHS:%[0-9]+]]:_(s16) = G_ZEXT [[Trunc]]
CHECK: [[SUB:%[0-9]+]]:_(s16) = G_SUB [[LHS]]:_, [[RHS]]:_
CHECK: [[CST:%[0-9]+]]:_(s16) = G_CONSTANT i16 255
CHECK: [[AND:%[0-9]+]]:_(s16) = G_AND [[SUB]]:_, [[CST]]:_
CHECK: G_ICMP intpred(ne), [[SUB]]:_(s16), [[AND]]:_
CHECK: G_TRUNC [[SUB]]
)";
// Check
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
TEST_F(GISelMITest, FewerElementsAnd) {
if (!TM)
return;
const LLT V2S32 = LLT::vector(2, 32);
const LLT V5S32 = LLT::vector(5, 32);
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_AND)
.legalFor({s32});
});
auto Op0 = B.buildUndef(V5S32);
auto Op1 = B.buildUndef(V5S32);
auto And = B.buildAnd(V5S32, Op0, Op1);
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
EXPECT_TRUE(Helper.fewerElementsVector(*And, 0, V2S32) ==
LegalizerHelper::LegalizeResult::Legalized);
auto CheckStr = R"(
CHECK: [[IMP_DEF0:%[0-9]+]]:_(<5 x s32>) = G_IMPLICIT_DEF
CHECK: [[IMP_DEF1:%[0-9]+]]:_(<5 x s32>) = G_IMPLICIT_DEF
CHECK: [[IMP_DEF2:%[0-9]+]]:_(<5 x s32>) = G_IMPLICIT_DEF
CHECK: [[EXTRACT0:%[0-9]+]]:_(<2 x s32>) = G_EXTRACT [[IMP_DEF0]]:_(<5 x s32>), 0
CHECK: [[EXTRACT1:%[0-9]+]]:_(<2 x s32>) = G_EXTRACT [[IMP_DEF1]]:_(<5 x s32>), 0
CHECK: [[AND0:%[0-9]+]]:_(<2 x s32>) = G_AND [[EXTRACT0]]:_, [[EXTRACT1]]:_
CHECK: [[INSERT0:%[0-9]+]]:_(<5 x s32>) = G_INSERT [[IMP_DEF2]]:_, [[AND0]]:_(<2 x s32>), 0
CHECK: [[EXTRACT2:%[0-9]+]]:_(<2 x s32>) = G_EXTRACT [[IMP_DEF0]]:_(<5 x s32>), 64
CHECK: [[EXTRACT3:%[0-9]+]]:_(<2 x s32>) = G_EXTRACT [[IMP_DEF1]]:_(<5 x s32>), 64
CHECK: [[AND1:%[0-9]+]]:_(<2 x s32>) = G_AND [[EXTRACT2]]:_, [[EXTRACT3]]:_
CHECK: [[INSERT1:%[0-9]+]]:_(<5 x s32>) = G_INSERT [[INSERT0]]:_, [[AND1]]:_(<2 x s32>), 64
CHECK: [[EXTRACT4:%[0-9]+]]:_(s32) = G_EXTRACT [[IMP_DEF0]]:_(<5 x s32>), 128
CHECK: [[EXTRACT5:%[0-9]+]]:_(s32) = G_EXTRACT [[IMP_DEF1]]:_(<5 x s32>), 128
CHECK: [[AND2:%[0-9]+]]:_(s32) = G_AND [[EXTRACT4]]:_, [[EXTRACT5]]:_
CHECK: [[INSERT2:%[0-9]+]]:_(<5 x s32>) = G_INSERT [[INSERT1]]:_, [[AND2]]:_(s32), 128
)";
// Check
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
TEST_F(GISelMITest, MoreElementsAnd) {
if (!TM)
return;
LLT s32 = LLT::scalar(32);
LLT v2s32 = LLT::vector(2, 32);
LLT v6s32 = LLT::vector(6, 32);
LegalizerInfo LI;
LI.getActionDefinitionsBuilder(TargetOpcode::G_AND)
.legalFor({v6s32})
.clampMinNumElements(0, s32, 6);
LI.computeTables();
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, LI, Observer, B);
B.setInsertPt(*EntryMBB, EntryMBB->end());
auto Val0 = B.buildBitcast(v2s32, Copies[0]);
auto Val1 = B.buildBitcast(v2s32, Copies[1]);
auto And = B.buildAnd(v2s32, Val0, Val1);
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.moreElementsVector(*And, 0, v6s32));
auto CheckStr = R"(
CHECK: [[BITCAST0:%[0-9]+]]:_(<2 x s32>) = G_BITCAST
CHECK: [[BITCAST1:%[0-9]+]]:_(<2 x s32>) = G_BITCAST
CHECK: [[IMP_DEF0:%[0-9]+]]:_(<2 x s32>) = G_IMPLICIT_DEF
CHECK: [[CONCAT0:%[0-9]+]]:_(<6 x s32>) = G_CONCAT_VECTORS [[BITCAST0]]:_(<2 x s32>), [[IMP_DEF0]]:_(<2 x s32>), [[IMP_DEF0]]:_(<2 x s32>)
CHECK: [[IMP_DEF1:%[0-9]+]]:_(<2 x s32>) = G_IMPLICIT_DEF
CHECK: [[CONCAT1:%[0-9]+]]:_(<6 x s32>) = G_CONCAT_VECTORS [[BITCAST1]]:_(<2 x s32>), [[IMP_DEF1]]:_(<2 x s32>), [[IMP_DEF1]]:_(<2 x s32>)
CHECK: [[AND:%[0-9]+]]:_(<6 x s32>) = G_AND [[CONCAT0]]:_, [[CONCAT1]]:_
CHECK: (<2 x s32>) = G_EXTRACT [[AND]]:_(<6 x s32>), 0
)";
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
TEST_F(GISelMITest, FewerElementsPhi) {
if (!TM)
return;
LLT s1 = LLT::scalar(1);
LLT s32 = LLT::scalar(32);
LLT s64 = LLT::scalar(64);
LLT v2s32 = LLT::vector(2, 32);
LLT v5s32 = LLT::vector(5, 32);
LegalizerInfo LI;
LI.getActionDefinitionsBuilder(TargetOpcode::G_PHI)
.legalFor({v2s32})
.clampMinNumElements(0, s32, 2);
LI.computeTables();
LLT PhiTy = v5s32;
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, LI, Observer, B);
B.setMBB(*EntryMBB);
MachineBasicBlock *MidMBB = MF->CreateMachineBasicBlock();
MachineBasicBlock *EndMBB = MF->CreateMachineBasicBlock();
MF->insert(MF->end(), MidMBB);
MF->insert(MF->end(), EndMBB);
EntryMBB->addSuccessor(MidMBB);
EntryMBB->addSuccessor(EndMBB);
MidMBB->addSuccessor(EndMBB);
auto InitVal = B.buildUndef(PhiTy);
auto InitOtherVal = B.buildConstant(s64, 999);
auto ICmp = B.buildICmp(CmpInst::ICMP_EQ, s1, Copies[0], Copies[1]);
B.buildBrCond(ICmp.getReg(0), *MidMBB);
B.buildBr(*EndMBB);
B.setMBB(*MidMBB);
auto MidVal = B.buildUndef(PhiTy);
auto MidOtherVal = B.buildConstant(s64, 345);
B.buildBr(*EndMBB);
B.setMBB(*EndMBB);
auto Phi = B.buildInstr(TargetOpcode::G_PHI)
.addDef(MRI->createGenericVirtualRegister(PhiTy))
.addUse(InitVal.getReg(0))
.addMBB(EntryMBB)
.addUse(MidVal.getReg(0))
.addMBB(MidMBB);
// Insert another irrelevant phi to make sure the rebuild is inserted after
// it.
B.buildInstr(TargetOpcode::G_PHI)
.addDef(MRI->createGenericVirtualRegister(s64))
.addUse(InitOtherVal.getReg(0))
.addMBB(EntryMBB)
.addUse(MidOtherVal.getReg(0))
.addMBB(MidMBB);
// Add some use instruction after the phis.
B.buildAnd(PhiTy, Phi.getReg(0), Phi.getReg(0));
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.fewerElementsVector(*Phi, 0, v2s32));
auto CheckStr = R"(
CHECK: [[INITVAL:%[0-9]+]]:_(<5 x s32>) = G_IMPLICIT_DEF
CHECK: [[EXTRACT0:%[0-9]+]]:_(<2 x s32>) = G_EXTRACT [[INITVAL]]:_(<5 x s32>), 0
CHECK: [[EXTRACT1:%[0-9]+]]:_(<2 x s32>) = G_EXTRACT [[INITVAL]]:_(<5 x s32>), 64
CHECK: [[EXTRACT2:%[0-9]+]]:_(s32) = G_EXTRACT [[INITVAL]]:_(<5 x s32>), 128
CHECK: G_BRCOND
CHECK: [[MIDVAL:%[0-9]+]]:_(<5 x s32>) = G_IMPLICIT_DEF
CHECK: [[EXTRACT3:%[0-9]+]]:_(<2 x s32>) = G_EXTRACT [[MIDVAL]]:_(<5 x s32>), 0
CHECK: [[EXTRACT4:%[0-9]+]]:_(<2 x s32>) = G_EXTRACT [[MIDVAL]]:_(<5 x s32>), 64
CHECK: [[EXTRACT5:%[0-9]+]]:_(s32) = G_EXTRACT [[MIDVAL]]:_(<5 x s32>), 128
CHECK: G_BR
CHECK: [[PHI0:%[0-9]+]]:_(<2 x s32>) = G_PHI [[EXTRACT0]]:_(<2 x s32>), %bb.0, [[EXTRACT3]]:_(<2 x s32>), %bb.1
CHECK: [[PHI1:%[0-9]+]]:_(<2 x s32>) = G_PHI [[EXTRACT1]]:_(<2 x s32>), %bb.0, [[EXTRACT4]]:_(<2 x s32>), %bb.1
CHECK: [[PHI2:%[0-9]+]]:_(s32) = G_PHI [[EXTRACT2]]:_(s32), %bb.0, [[EXTRACT5]]:_(s32), %bb.1
CHECK: [[OTHER_PHI:%[0-9]+]]:_(s64) = G_PHI
CHECK: [[REBUILD_VAL_IMPDEF:%[0-9]+]]:_(<5 x s32>) = G_IMPLICIT_DEF
CHECK: [[INSERT0:%[0-9]+]]:_(<5 x s32>) = G_INSERT [[REBUILD_VAL_IMPDEF]]:_, [[PHI0]]:_(<2 x s32>), 0
CHECK: [[INSERT1:%[0-9]+]]:_(<5 x s32>) = G_INSERT [[INSERT0]]:_, [[PHI1]]:_(<2 x s32>), 64
CHECK: [[INSERT2:%[0-9]+]]:_(<5 x s32>) = G_INSERT [[INSERT1]]:_, [[PHI2]]:_(s32), 128
CHECK: [[USE_OP:%[0-9]+]]:_(<5 x s32>) = G_AND [[INSERT2]]:_, [[INSERT2]]:_
)";
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
// FNEG expansion in terms of FSUB
TEST_F(GISelMITest, LowerFNEG) {
if (!TM)
return;
// Declare your legalization info
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_FSUB).legalFor({s64});
});
// Build Instr. Make sure FMF are preserved.
auto FAdd =
B.buildInstr(TargetOpcode::G_FADD, {LLT::scalar(64)}, {Copies[0], Copies[1]},
MachineInstr::MIFlag::FmNsz);
// Should not propagate the flags of src instruction.
auto FNeg0 =
B.buildInstr(TargetOpcode::G_FNEG, {LLT::scalar(64)}, {FAdd.getReg(0)},
{MachineInstr::MIFlag::FmArcp});
// Preserve the one flag.
auto FNeg1 =
B.buildInstr(TargetOpcode::G_FNEG, {LLT::scalar(64)}, {Copies[0]},
MachineInstr::MIFlag::FmNoInfs);
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
// Perform Legalization
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.lower(*FNeg0, 0, LLT::scalar(64)));
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.lower(*FNeg1, 0, LLT::scalar(64)));
auto CheckStr = R"(
CHECK: [[FADD:%[0-9]+]]:_(s64) = nsz G_FADD %0:_, %1:_
CHECK: [[CONST0:%[0-9]+]]:_(s64) = G_FCONSTANT double -0.000000e+00
CHECK: [[FSUB0:%[0-9]+]]:_(s64) = arcp G_FSUB [[CONST0]]:_, [[FADD]]:_
CHECK: [[CONST1:%[0-9]+]]:_(s64) = G_FCONSTANT double -0.000000e+00
CHECK: [[FSUB1:%[0-9]+]]:_(s64) = ninf G_FSUB [[CONST1]]:_, %0:_
)";
// Check
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
TEST_F(GISelMITest, LowerMinMax) {
if (!TM)
return;
LLT s64 = LLT::scalar(64);
LLT v2s32 = LLT::vector(2, 32);
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder({G_SMIN, G_SMAX, G_UMIN, G_UMAX})
.lowerFor({s64, LLT::vector(2, s32)});
});
auto SMin = B.buildSMin(s64, Copies[0], Copies[1]);
auto SMax = B.buildSMax(s64, Copies[0], Copies[1]);
auto UMin = B.buildUMin(s64, Copies[0], Copies[1]);
auto UMax = B.buildUMax(s64, Copies[0], Copies[1]);
auto VecVal0 = B.buildBitcast(v2s32, Copies[0]);
auto VecVal1 = B.buildBitcast(v2s32, Copies[1]);
auto SMinV = B.buildSMin(v2s32, VecVal0, VecVal1);
auto SMaxV = B.buildSMax(v2s32, VecVal0, VecVal1);
auto UMinV = B.buildUMin(v2s32, VecVal0, VecVal1);
auto UMaxV = B.buildUMax(v2s32, VecVal0, VecVal1);
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.lower(*SMin, 0, s64));
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.lower(*SMax, 0, s64));
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.lower(*UMin, 0, s64));
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.lower(*UMax, 0, s64));
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.lower(*SMinV, 0, v2s32));
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.lower(*SMaxV, 0, v2s32));
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.lower(*UMinV, 0, v2s32));
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.lower(*UMaxV, 0, v2s32));
auto CheckStr = R"(
CHECK: [[CMP0:%[0-9]+]]:_(s1) = G_ICMP intpred(slt), %0:_(s64), %1:_
CHECK: [[SMIN:%[0-9]+]]:_(s64) = G_SELECT [[CMP0]]:_(s1), %0:_, %1:_
CHECK: [[CMP1:%[0-9]+]]:_(s1) = G_ICMP intpred(sgt), %0:_(s64), %1:_
CHECK: [[SMAX:%[0-9]+]]:_(s64) = G_SELECT [[CMP1]]:_(s1), %0:_, %1:_
CHECK: [[CMP2:%[0-9]+]]:_(s1) = G_ICMP intpred(ult), %0:_(s64), %1:_
CHECK: [[UMIN:%[0-9]+]]:_(s64) = G_SELECT [[CMP2]]:_(s1), %0:_, %1:_
CHECK: [[CMP3:%[0-9]+]]:_(s1) = G_ICMP intpred(ugt), %0:_(s64), %1:_
CHECK: [[UMAX:%[0-9]+]]:_(s64) = G_SELECT [[CMP3]]:_(s1), %0:_, %1:_
CHECK: [[VEC0:%[0-9]+]]:_(<2 x s32>) = G_BITCAST %0:_(s64)
CHECK: [[VEC1:%[0-9]+]]:_(<2 x s32>) = G_BITCAST %1:_(s64)
CHECK: [[VCMP0:%[0-9]+]]:_(<2 x s1>) = G_ICMP intpred(slt), [[VEC0]]:_(<2 x s32>), [[VEC1]]:_
CHECK: [[SMINV:%[0-9]+]]:_(<2 x s32>) = G_SELECT [[VCMP0]]:_(<2 x s1>), [[VEC0]]:_, [[VEC1]]:_
CHECK: [[VCMP1:%[0-9]+]]:_(<2 x s1>) = G_ICMP intpred(sgt), [[VEC0]]:_(<2 x s32>), [[VEC1]]:_
CHECK: [[SMAXV:%[0-9]+]]:_(<2 x s32>) = G_SELECT [[VCMP1]]:_(<2 x s1>), [[VEC0]]:_, [[VEC1]]:_
CHECK: [[VCMP2:%[0-9]+]]:_(<2 x s1>) = G_ICMP intpred(ult), [[VEC0]]:_(<2 x s32>), [[VEC1]]:_
CHECK: [[UMINV:%[0-9]+]]:_(<2 x s32>) = G_SELECT [[VCMP2]]:_(<2 x s1>), [[VEC0]]:_, [[VEC1]]:_
CHECK: [[VCMP3:%[0-9]+]]:_(<2 x s1>) = G_ICMP intpred(ugt), [[VEC0]]:_(<2 x s32>), [[VEC1]]:_
CHECK: [[UMAXV:%[0-9]+]]:_(<2 x s32>) = G_SELECT [[VCMP3]]:_(<2 x s1>), [[VEC0]]:_, [[VEC1]]:_
)";
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
TEST_F(GISelMITest, WidenScalarBuildVector) {
if (!TM)
return;
LLT S32 = LLT::scalar(32);
LLT S16 = LLT::scalar(16);
LLT V2S16 = LLT::vector(2, S16);
LLT V2S32 = LLT::vector(2, S32);
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder({G_SMIN, G_SMAX, G_UMIN, G_UMAX})
.lowerFor({s64, LLT::vector(2, s32)});
});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
B.setInsertPt(*EntryMBB, EntryMBB->end());
Register Constant0 = B.buildConstant(S16, 1).getReg(0);
Register Constant1 = B.buildConstant(S16, 2).getReg(0);
auto BV0 = B.buildBuildVector(V2S16, {Constant0, Constant1});
auto BV1 = B.buildBuildVector(V2S16, {Constant0, Constant1});
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.widenScalar(*BV0, 0, V2S32));
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.widenScalar(*BV1, 1, S32));
auto CheckStr = R"(
CHECK: [[K0:%[0-9]+]]:_(s16) = G_CONSTANT i16 1
CHECK-NEXT: [[K1:%[0-9]+]]:_(s16) = G_CONSTANT i16 2
CHECK-NEXT: [[EXT_K0_0:%[0-9]+]]:_(s32) = G_ANYEXT [[K0]]
CHECK-NEXT: [[EXT_K1_0:%[0-9]+]]:_(s32) = G_ANYEXT [[K1]]
CHECK-NEXT: [[BV0:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[EXT_K0_0]]:_(s32), [[EXT_K1_0]]:_(s32)
CHECK-NEXT: [[BV0_TRUNC:%[0-9]+]]:_(<2 x s16>) = G_TRUNC [[BV0]]
CHECK: [[EXT_K0_1:%[0-9]+]]:_(s32) = G_ANYEXT [[K0]]
CHECK-NEXT: [[EXT_K1_1:%[0-9]+]]:_(s32) = G_ANYEXT [[K1]]
CHECK-NEXT: [[BV1:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[EXT_K0_1]]:_(s32), [[EXT_K1_1]]:_(s32)
)";
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
TEST_F(GISelMITest, LowerMergeValues) {
if (!TM)
return;
const LLT S32 = LLT::scalar(32);
const LLT S24 = LLT::scalar(24);
const LLT S21 = LLT::scalar(21);
const LLT S16 = LLT::scalar(16);
const LLT S9 = LLT::scalar(9);
const LLT S8 = LLT::scalar(8);
const LLT S3 = LLT::scalar(3);
DefineLegalizerInfo(A, {
getActionDefinitionsBuilder(G_UNMERGE_VALUES)
.widenScalarIf(typeIs(1, LLT::scalar(3)), changeTo(1, LLT::scalar(9)));
});
AInfo Info(MF->getSubtarget());
DummyGISelObserver Observer;
LegalizerHelper Helper(*MF, Info, Observer, B);
B.setInsertPt(*EntryMBB, EntryMBB->end());
// 24 = 3 3 3 3 3 3 3 3
// => 9
//
// This can do 3 merges, but need an extra implicit_def.
SmallVector<Register, 8> Merge0Ops;
for (int I = 0; I != 8; ++I)
Merge0Ops.push_back(B.buildConstant(S3, I).getReg(0));
auto Merge0 = B.buildMerge(S24, Merge0Ops);
// 21 = 3 3 3 3 3 3 3
// => 9, 2 extra implicit_def needed
//
SmallVector<Register, 8> Merge1Ops;
for (int I = 0; I != 7; ++I)
Merge1Ops.push_back(B.buildConstant(S3, I).getReg(0));
auto Merge1 = B.buildMerge(S21, Merge1Ops);
SmallVector<Register, 8> Merge2Ops;
for (int I = 0; I != 2; ++I)
Merge2Ops.push_back(B.buildConstant(S8, I).getReg(0));
auto Merge2 = B.buildMerge(S16, Merge2Ops);
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.widenScalar(*Merge0, 1, S9));
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.widenScalar(*Merge1, 1, S9));
// Request a source size greater than the original destination size.
EXPECT_EQ(LegalizerHelper::LegalizeResult::Legalized,
Helper.widenScalar(*Merge2, 1, S32));
auto CheckStr = R"(
CHECK: [[K0:%[0-9]+]]:_(s3) = G_CONSTANT i3 0
CHECK-NEXT: [[K1:%[0-9]+]]:_(s3) = G_CONSTANT i3 1
CHECK-NEXT: [[K2:%[0-9]+]]:_(s3) = G_CONSTANT i3 2
CHECK-NEXT: [[K3:%[0-9]+]]:_(s3) = G_CONSTANT i3 3
CHECK-NEXT: [[K4:%[0-9]+]]:_(s3) = G_CONSTANT i3 -4
CHECK-NEXT: [[K5:%[0-9]+]]:_(s3) = G_CONSTANT i3 -3
CHECK-NEXT: [[K6:%[0-9]+]]:_(s3) = G_CONSTANT i3 -2
CHECK-NEXT: [[K7:%[0-9]+]]:_(s3) = G_CONSTANT i3 -1
CHECK-NEXT: [[IMPDEF0:%[0-9]+]]:_(s3) = G_IMPLICIT_DEF
CHECK-NEXT: [[MERGE0:%[0-9]+]]:_(s9) = G_MERGE_VALUES [[K0]]:_(s3), [[K1]]:_(s3), [[K2]]:_(s3)
CHECK-NEXT: [[MERGE1:%[0-9]+]]:_(s9) = G_MERGE_VALUES [[K3]]:_(s3), [[K4]]:_(s3), [[K5]]:_(s3)
CHECK-NEXT: [[MERGE2:%[0-9]+]]:_(s9) = G_MERGE_VALUES [[K6]]:_(s3), [[K7]]:_(s3), [[IMPDEF0]]:_(s3)
CHECK-NEXT: [[MERGE3:%[0-9]+]]:_(s27) = G_MERGE_VALUES [[MERGE0]]:_(s9), [[MERGE1]]:_(s9), [[MERGE2]]:_(s9)
CHECK-NEXT: (s24) = G_TRUNC [[MERGE3]]:_(s27)
CHECK: [[K8:%[0-9]+]]:_(s3) = G_CONSTANT i3 0
CHECK-NEXT: [[K9:%[0-9]+]]:_(s3) = G_CONSTANT i3 1
CHECK-NEXT: [[K10:%[0-9]+]]:_(s3) = G_CONSTANT i3 2
CHECK-NEXT: [[K11:%[0-9]+]]:_(s3) = G_CONSTANT i3 3
CHECK-NEXT: [[K12:%[0-9]+]]:_(s3) = G_CONSTANT i3 -4
CHECK-NEXT: [[K13:%[0-9]+]]:_(s3) = G_CONSTANT i3 -3
CHECK-NEXT: [[K14:%[0-9]+]]:_(s3) = G_CONSTANT i3 -2
CHECK-NEXT: [[IMPDEF1:%[0-9]+]]:_(s3) = G_IMPLICIT_DEF
CHECK-NEXT: [[MERGE4:%[0-9]+]]:_(s9) = G_MERGE_VALUES [[K8]]:_(s3), [[K9]]:_(s3), [[K10]]:_(s3)
CHECK-NEXT: [[MERGE5:%[0-9]+]]:_(s9) = G_MERGE_VALUES [[K11]]:_(s3), [[K12]]:_(s3), [[K13]]:_(s3)
CHECK-NEXT: [[MERGE6:%[0-9]+]]:_(s9) = G_MERGE_VALUES [[K14]]:_(s3), [[IMPDEF1]]:_(s3), [[IMPDEF1]]:_(s3)
CHECK-NEXT: [[MERGE7:%[0-9]+]]:_(s27) = G_MERGE_VALUES [[MERGE4]]:_(s9), [[MERGE5]]:_(s9), [[MERGE6]]:_(s9)
CHECK-NEXT: (s21) = G_TRUNC [[MERGE7]]:_(s27)
CHECK: [[K15:%[0-9]+]]:_(s8) = G_CONSTANT i8 0
CHECK-NEXT: [[K16:%[0-9]+]]:_(s8) = G_CONSTANT i8 1
CHECK-NEXT: [[ZEXT_K15:[0-9]+]]:_(s32) = G_ZEXT [[K15]]:_(s8)
CHECK-NEXT: [[ZEXT_K16:[0-9]+]]:_(s32) = G_ZEXT [[K16]]:_(s8)
[[K16:%[0-9]+]]:_(s32) = G_CONSTANT i32 8
[[SHL:%[0-9]+]]:_(s32) = G_SHL [[ZEXT_K16]]:_, [[K16]]:_(s32)
[[OR:%[0-9]+]]:_(s32) = G_OR [[ZEXT_K16]]:_, [[SHL]]:_
(s16) = G_TRUNC [[OR]]:_(s32)
)";
EXPECT_TRUE(CheckMachineFunction(*MF, CheckStr)) << *MF;
}
} // namespace