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
|
// Copyright (c) 2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "modify_maximal_reconvergence.h"
#include "source/opt/ir_context.h"
#include "source/util/make_unique.h"
namespace spvtools {
namespace opt {
Pass::Status ModifyMaximalReconvergence::Process() {
bool changed = false;
if (add_) {
changed = AddMaximalReconvergence();
} else {
changed = RemoveMaximalReconvergence();
}
return changed ? Pass::Status::SuccessWithChange
: Pass::Status::SuccessWithoutChange;
}
bool ModifyMaximalReconvergence::AddMaximalReconvergence() {
bool changed = false;
bool has_extension = false;
bool has_shader =
context()->get_feature_mgr()->HasCapability(spv::Capability::Shader);
for (auto extension : context()->extensions()) {
if (extension.GetOperand(0).AsString() == "SPV_KHR_maximal_reconvergence") {
has_extension = true;
break;
}
}
std::unordered_set<uint32_t> entry_points_with_mode;
for (auto mode : get_module()->execution_modes()) {
if (spv::ExecutionMode(mode.GetSingleWordInOperand(1)) ==
spv::ExecutionMode::MaximallyReconvergesKHR) {
entry_points_with_mode.insert(mode.GetSingleWordInOperand(0));
}
}
for (auto entry_point : get_module()->entry_points()) {
const uint32_t id = entry_point.GetSingleWordInOperand(1);
if (!entry_points_with_mode.count(id)) {
changed = true;
if (!has_extension) {
context()->AddExtension("SPV_KHR_maximal_reconvergence");
has_extension = true;
}
if (!has_shader) {
context()->AddCapability(spv::Capability::Shader);
has_shader = true;
}
context()->AddExecutionMode(MakeUnique<Instruction>(
context(), spv::Op::OpExecutionMode, 0, 0,
std::initializer_list<Operand>{
{SPV_OPERAND_TYPE_ID, {id}},
{SPV_OPERAND_TYPE_EXECUTION_MODE,
{static_cast<uint32_t>(
spv::ExecutionMode::MaximallyReconvergesKHR)}}}));
entry_points_with_mode.insert(id);
}
}
return changed;
}
bool ModifyMaximalReconvergence::RemoveMaximalReconvergence() {
bool changed = false;
std::vector<Instruction*> to_remove;
Instruction* mode = &*get_module()->execution_mode_begin();
while (mode) {
if (mode->opcode() != spv::Op::OpExecutionMode &&
mode->opcode() != spv::Op::OpExecutionModeId) {
break;
}
if (spv::ExecutionMode(mode->GetSingleWordInOperand(1)) ==
spv::ExecutionMode::MaximallyReconvergesKHR) {
mode = context()->KillInst(mode);
changed = true;
} else {
mode = mode->NextNode();
}
}
changed |=
context()->RemoveExtension(Extension::kSPV_KHR_maximal_reconvergence);
return changed;
}
} // namespace opt
} // namespace spvtools
|
