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
|
#pragma once
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
//===- 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
//
//===----------------------------------------------------------------------===//
/// \file
/// Interface for Targets to specify which operations are combined how and when.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_GLOBALISEL_COMBINERINFO_H
#define LLVM_CODEGEN_GLOBALISEL_COMBINERINFO_H
#include <cassert>
namespace llvm {
class GISelChangeObserver;
class LegalizerInfo;
class MachineInstr;
class MachineIRBuilder;
// Contains information relevant to enabling/disabling various combines for a
// pass.
class CombinerInfo {
public:
CombinerInfo(bool AllowIllegalOps, bool ShouldLegalizeIllegal,
const LegalizerInfo *LInfo, bool OptEnabled, bool OptSize,
bool MinSize)
: IllegalOpsAllowed(AllowIllegalOps),
LegalizeIllegalOps(ShouldLegalizeIllegal), LInfo(LInfo),
EnableOpt(OptEnabled), EnableOptSize(OptSize), EnableMinSize(MinSize) {
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;
/// Whether optimizations should be enabled. This is to distinguish between
/// uses of the combiner unconditionally and only when optimizations are
/// specifically enabled/
bool EnableOpt;
/// Whether we're optimizing for size.
bool EnableOptSize;
/// Whether we're optimizing for minsize (-Oz).
bool EnableMinSize;
/// 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
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
|
