blob: 3b09a8e2b479fafd666eb39cbaf8740727f802ba (
plain) (
blame)
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
|
//===- llvm/CodeGen/GlobalISel/CombinerInfo.h ------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
/// Interface for Targets to specify which operations are combined how and when.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_GLOBALISEL_COMBINER_INFO_H
#define LLVM_CODEGEN_GLOBALISEL_COMBINER_INFO_H
#include <cassert>
namespace llvm {
class GISelChangeObserver;
class LegalizerInfo;
class MachineInstr;
class MachineIRBuilder;
class MachineRegisterInfo;
// Contains information relevant to enabling/disabling various combines for a
// pass.
class CombinerInfo {
public:
CombinerInfo(bool AllowIllegalOps, bool ShouldLegalizeIllegal,
LegalizerInfo *LInfo)
: IllegalOpsAllowed(AllowIllegalOps),
LegalizeIllegalOps(ShouldLegalizeIllegal), LInfo(LInfo) {
assert(((AllowIllegalOps || !LegalizeIllegalOps) || LInfo) &&
"Expecting legalizerInfo when illegalops not allowed");
}
virtual ~CombinerInfo() = default;
/// If \p IllegalOpsAllowed is false, the CombinerHelper will make use of
/// the legalizerInfo to check for legality before each transformation.
bool IllegalOpsAllowed; // TODO: Make use of this.
/// If \p LegalizeIllegalOps is true, the Combiner will also legalize the
/// illegal ops that are created.
bool LegalizeIllegalOps; // TODO: Make use of this.
const LegalizerInfo *LInfo;
/// Attempt to combine instructions using MI as the root.
///
/// Use Observer to report the creation, modification, and erasure of
/// instructions. GISelChangeObserver will automatically report certain
/// kinds of operations. These operations are:
/// * Instructions that are newly inserted into the MachineFunction
/// * Instructions that are erased from the MachineFunction.
///
/// However, it is important to report instruction modification and this is
/// not automatic.
virtual bool combine(GISelChangeObserver &Observer, MachineInstr &MI,
MachineIRBuilder &B) const = 0;
};
} // namespace llvm
#endif
|
