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
|
// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef RCC_CODEGEN_GLOBALISEL_LEGALIZERINFO_H
#define RCC_CODEGEN_GLOBALISEL_LEGALIZERINFO_H
#include "rcc/Support/Error.h"
#include <cstdint>
namespace rcc {
class MachineFunction;
class MachineInstr;
class TargetDescription;
enum class LegalizationAction : std::uint8_t {
Legal,
Unsupported,
Custom,
Lower,
Libcall,
WidenScalar,
NarrowScalar,
MoreElements,
FewerElements,
Bitcast,
ChangeElementType,
ChangeAddressSpace,
};
class LegalizerInfo {
public:
virtual ~LegalizerInfo() = default;
[[nodiscard]] virtual Expected<LegalizationAction>
classify(const MachineInstr &Instruction, const MachineFunction &Function,
const TargetDescription &Target) const = 0;
[[nodiscard]] virtual Expected<void> lower(MachineInstr &Instruction, MachineFunction &Function,
const TargetDescription &Target,
LegalizationAction Action) const = 0;
// This hook performs read-only target checks before a lowering mutation is committed.
[[nodiscard]] virtual Expected<void> validateLowering(const MachineInstr &,
const MachineFunction &,
const TargetDescription &,
LegalizationAction) const {
return {};
}
};
} // namespace rcc
#endif // RCC_CODEGEN_GLOBALISEL_LEGALIZERINFO_H
|
