blob: 135d4a5e0dd0bd9eff5185ace6552325d0b1351f (
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
62
63
64
65
|
//===- Target.td - Define GlobalISel rules -----------------*- tablegen -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file defines the target-independent interfaces used to support
// SelectionDAG instruction selection patterns (specified in
// TargetSelectionDAG.td) when generating GlobalISel instruction selectors.
//
// This is intended as a compatibility layer, to enable reuse of target
// descriptions written for SelectionDAG without requiring explicit GlobalISel
// support. It will eventually supersede SelectionDAG patterns.
//
//===----------------------------------------------------------------------===//
// Definitions that inherit from LLT define types that will be used in the
// GlobalISel matcher.
class LLT;
def s32 : LLT;
def s64 : LLT;
// Defines a matcher for complex operands. This is analogous to ComplexPattern
// from SelectionDAG.
//
// Definitions that inherit from this may also inherit from
// GIComplexPatternEquiv to enable the import of SelectionDAG patterns involving
// those ComplexPatterns.
class GIComplexOperandMatcher<LLT type, string matcherfn> {
// The expected type of the root of the match.
//
// TODO: We should probably support, any-type, any-scalar, and multiple types
// in the future.
LLT Type = type;
// The function that determines whether the operand matches. It should be of
// the form:
// ComplexRendererFn select(MachineOperand &Root) const;
// where Root is the root of the match. The function should return nullptr
// on match failure, or a ComplexRendererFn that renders the operand in case
// of a successful match.
string MatcherFn = matcherfn;
}
// Defines a custom renderer. This is analogous to SDNodeXForm from
// SelectionDAG. Unlike SDNodeXForm, this matches a MachineInstr and
// renders directly to the result instruction without an intermediate node.
//
// Definitions that inherit from this may also inherit from GISDNodeXFormEquiv
// to enable the import of SelectionDAG patterns involving those SDNodeXForms.
class GICustomOperandRenderer<string rendererfn> {
// The function renders the operand(s) of the matched instruction to
// the specified instruction. It should be of the form:
// void render(MachineInstrBuilder &MIB, const MachineInstr &MI,
// int OpIdx = -1)
//
// If OpIdx is specified (i.e. not invalid/negative), this
// references the source operand MI.getOperand(OpIdx). Otherwise,
// this is the value defined by MI. This is to support the case
// where there is no corresponding instruction to match.
string RendererFn = rendererfn;
}
|
