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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
// SPDX-License-Identifier: GPL-3.0-or-later
#include "rcc/CodeGen/MachineFrameInfo.h"
#include "rcc/CodeGen/MachineDebugInfo.h"
#include <cstdint>
#include <iostream>
#include <optional>
#include <string_view>
namespace {
class TestContext final {
public:
void expect(bool Condition, std::string_view Message) {
if (Condition)
return;
std::cerr << Message << '\n';
++FailureCount;
}
[[nodiscard]] int result() const noexcept {
return FailureCount == 0 ? 0 : 1;
}
private:
int FailureCount = 0;
};
[[nodiscard]] rcc::StackObjectDesc fixedObject(std::uint64_t Size, std::uint64_t Align) {
rcc::StackObjectDesc Description;
Description.Size = Size;
Description.Align = *rcc::Alignment::create(Align);
return Description;
}
void testObjectLifecycle(TestContext &Context) {
rcc::MachineFrameInfo Frame;
auto LocalDescription = fixedObject(8, 8);
LocalDescription.IsAliased = true;
LocalDescription.AddressTaken = true;
LocalDescription.Lifetime.push_back(
{rcc::MachineInstrStableID::fromValue(3), rcc::MachineInstrStableID::fromValue(7)});
auto Local = Frame.createObject(LocalDescription);
auto FixedDescription = fixedObject(16, 16);
FixedDescription.Kind = rcc::StackObjectKind::FixedABI;
FixedDescription.Offset = -32;
auto Fixed = Frame.createObject(FixedDescription);
auto SpillDescription = fixedObject(8, 8);
SpillDescription.Kind = rcc::StackObjectKind::SpillSlot;
auto Spill = Frame.createObject(SpillDescription);
rcc::StackObjectDesc VariableDescription;
VariableDescription.Kind = rcc::StackObjectKind::VariableSized;
VariableDescription.Align = *rcc::Alignment::create(32);
auto Variable = Frame.createObject(VariableDescription);
Context.expect(Local && Fixed && Spill && Variable, "valid stack object kinds must be created");
if (!Local || !Fixed || !Spill || !Variable)
return;
Context.expect(Local->value() == 0 && Fixed->value() == 1 && Spill->value() == 2 &&
Variable->value() == 3 && Frame.liveObjectCount() == 4,
"frame indices must be monotonic table identities");
Context.expect(Frame.object(*Fixed)->isFixed() && Frame.object(*Spill)->isSpill() &&
Frame.object(*Variable)->isVariableSized(),
"stack object semantic categories must be derived exactly");
Context.expect(Frame.setObjectOffset(*Local, -8).has_value() &&
Frame.setObjectOffset(*Spill, -16).has_value() &&
Frame.markObjectDead(*Spill).has_value(),
"live stack objects must support controlled pre-freeze updates");
Context.expect(Frame.object(*Spill)->description()->IsDead,
"dead stack object state must remain explicit");
Context.expect(Frame.eraseObject(*Fixed).has_value() && Frame.object(*Fixed) == nullptr &&
Frame.liveObjectCount() == 3,
"erasing a stack object must leave an inaccessible tombstone");
auto Replacement = Frame.createObject(fixedObject(4, 4));
Context.expect(Replacement && Replacement->value() == 4,
"erased frame indices must never be reused");
if (!Replacement)
return;
Context.expect(Frame.setObjectOffset(*Replacement, -24).has_value(),
"replacement stack object must accept a final offset");
Context.expect(Frame.setMaxCallFrameSize(24).has_value() &&
Frame.freeze(64, *rcc::Alignment::create(16)).has_value() &&
Frame.isFrozen() && Frame.staticStackSize() == 64 &&
Frame.stackAlignment().bytes() == 16 && Frame.maxCallFrameSize() == 24 &&
Frame.verify().has_value(),
"complete frame layout must freeze atomically");
Context.expect(!Frame.createObject(fixedObject(8, 8)) && !Frame.setObjectOffset(*Local, -40) &&
!Frame.eraseObject(*Local) && !Frame.setMaxCallFrameSize(32) &&
!Frame.freeze(64, *rcc::Alignment::create(16)),
"frozen frames must reject every semantic mutation");
}
void testInvalidDescriptions(TestContext &Context) {
rcc::MachineFrameInfo Frame;
rcc::StackObjectDesc MissingSize;
Context.expect(!Frame.createObject(MissingSize),
"fixed-size stack object must reject a missing size");
auto ZeroSize = fixedObject(0, 1);
Context.expect(!Frame.createObject(ZeroSize), "fixed-size stack object must reject zero size");
rcc::StackObjectDesc InvalidVariable;
InvalidVariable.Kind = rcc::StackObjectKind::DynamicAlloca;
InvalidVariable.Size = 8;
Context.expect(!Frame.createObject(InvalidVariable),
"variable-sized stack object must reject a fixed size");
auto MissingFixedOffset = fixedObject(8, 8);
MissingFixedOffset.Kind = rcc::StackObjectKind::FixedABI;
Context.expect(!Frame.createObject(MissingFixedOffset),
"fixed ABI stack object must require an offset");
auto InvalidTarget = fixedObject(8, 8);
InvalidTarget.Kind = rcc::StackObjectKind::Target;
Context.expect(!Frame.createObject(InvalidTarget),
"target stack object must carry target identity");
auto InvalidLifetime = fixedObject(8, 8);
InvalidLifetime.Lifetime.push_back(
{rcc::MachineInstrStableID::fromValue(4), rcc::MachineInstrStableID::fromValue(4)});
Context.expect(!Frame.createObject(InvalidLifetime),
"stack object lifetime must reject equal boundaries");
auto InvalidDebugInfo = fixedObject(8, 8);
InvalidDebugInfo.DebugInfo.emplace();
Context.expect(!Frame.createObject(InvalidDebugInfo),
"stack object debug information must not be structurally empty");
auto DebugObject = fixedObject(8, 8);
DebugObject.DebugInfo = rcc::MachineVariableDebugInfo{
.Variable = rcc::MachineMetadataReference::embeddedIR(1),
.Expression = rcc::MachineMetadataValue::expression(rcc::MachineDIExpression{}),
.Location = std::nullopt,
};
auto DebugIndex = Frame.createObject(DebugObject);
Context.expect(DebugIndex.has_value() &&
Frame.object(*DebugIndex)->description()->DebugInfo == DebugObject.DebugInfo,
"stack object debug information must remain structured");
Context.expect(
rcc::StackID::fromValue(0) && rcc::StackID::fromValue(4) && rcc::StackID::fromValue(255) &&
!rcc::StackID::fromValue(5) && !rcc::StackID::fromValue(256) &&
rcc::parseStackIDName("sgpr-spill") == rcc::StackID::sgprSpillStack() &&
rcc::parseStackIDName("scalable-vector") == rcc::StackID::scalableVectorStack() &&
rcc::parseStackIDName("scalable-predicate-vector") ==
rcc::StackID::scalablePredicateVectorStack() &&
rcc::parseStackIDName("wasm-local") == rcc::StackID::wasmLocalStack() &&
rcc::parseStackIDName("noalloc") == rcc::StackID::noAllocStack() &&
!rcc::parseStackIDName("safe") &&
rcc::getStackIDName(rcc::StackID::noAllocStack()) == "noalloc",
"stack IDs and names must match the fixed LLVM MIR enumeration");
auto Target = fixedObject(8, 8);
Target.Kind = rcc::StackObjectKind::Target;
Target.Stack = rcc::StackID::sgprSpillStack();
auto TargetIndex = Frame.createObject(Target);
Context.expect(TargetIndex.has_value(), "special stack identity must admit target stack objects");
auto Unresolved = Frame.createObject(fixedObject(8, 8));
Context.expect(Unresolved && !Frame.freeze(16, *rcc::Alignment::create(8)) && !Frame.isFrozen() &&
!Frame.staticStackSize() && Frame.verify().has_value(),
"failed frame freeze must not mutate frame state");
}
} // namespace
int main() {
TestContext Context;
testObjectLifecycle(Context);
testInvalidDescriptions(Context);
return Context.result();
}
|
