1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
// SPDX-License-Identifier: GPL-3.0-or-later
#include "CodeGen/RegisterAllocationTestSupport.h"
#include "rcc/CodeGen/MachineCFGUpdater.h"
#include <iostream>
namespace {
using namespace rcc;
using namespace rcc::test;
using namespace rcc::test::ra;
void testBlockBoundary(TestContext &Context, const TargetDescription &Target) {
auto Fixture = createFunction("fast-boundary", 40);
if (!Fixture)
return;
auto Exit = Fixture->Function->createBasicBlock();
if (!Exit || !Fixture->Function->appendBlock(**Exit) ||
!Fixture->Function->cfgUpdater().addSuccessor(*Fixture->Block, **Exit,
BranchProbability::one()))
return;
auto Value = createVReg(*Fixture->Function);
if (!Value || !buildDef(*Fixture->Function, Target, *Fixture->Block, *Value, 9) ||
!buildUse(*Fixture->Function, Target, **Exit, *Value) ||
!buildUse(*Fixture->Function, Target, **Exit,
Register::fromPhysical(physical(TestRegister::G0))) ||
!prepareForAllocation(*Fixture->Function, Target))
return;
TestRegisterAllocationInfo Info;
auto Allocated = runAllocator(*Fixture->Function, Target, Info, AllocatorKind::Fast);
Context.expect(Allocated && countOpcode(*Fixture->Function, testOpcode(SpillStoreOpcode)) == 1 &&
countOpcode(*Fixture->Function, testOpcode(SpillLoadOpcode)) == 1 &&
Fixture->Function->properties().has(MachineFunctionProperty::NoVRegs),
"FastAllocator must preserve values across a block boundary");
}
void testFunctionLiveInAndDebug(TestContext &Context, const TargetDescription &Target) {
auto Fixture = createFunction("fast-live-in", 41);
if (!Fixture)
return;
auto Value = createVReg(*Fixture->Function);
const PhysicalRegister G0 = physical(TestRegister::G0);
if (!Value || !Fixture->Function->registerInfo().addLiveIn(G0, *Value) ||
!buildUse(*Fixture->Function, Target, *Fixture->Block, *Value, {}, true) ||
!buildUse(*Fixture->Function, Target, *Fixture->Block, *Value) ||
!prepareForAllocation(*Fixture->Function, Target))
return;
TestRegisterAllocationInfo Info;
auto Allocated = runAllocator(*Fixture->Function, Target, Info, AllocatorKind::Fast);
const MachineOperand *DebugOperand = nullptr;
for (const MachineInstr *Instruction = Fixture->Block->firstInstruction(); Instruction != nullptr;
Instruction = Instruction->next()) {
for (const MachineOperand &Operand : Instruction->operands()) {
if (Operand.isDebugUse()) {
DebugOperand = &Operand;
break;
}
}
if (DebugOperand != nullptr)
break;
}
Context.expect(
Allocated && DebugOperand != nullptr && DebugOperand->registerValue() &&
(DebugOperand->registerValue()->isNoRegister() ||
DebugOperand->registerValue() == Register::fromPhysical(G0)) &&
std::ranges::none_of(Fixture->Function->registerInfo().virtualRegisters(),
[](const VirtualRegisterInfo &Info) { return !Info.IsTombstone; }),
"FastAllocator must preserve function live-ins and debug locations");
}
} // namespace
int main() {
TestContext Context;
auto Target = createTarget();
Context.expect(Target.has_value(), "FastAllocator test target must be constructible");
if (!Target)
return Context.result();
testBlockBoundary(Context, *Target);
testFunctionLiveInAndDebug(Context, *Target);
return Context.result();
}
|
