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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
// Copyright (c) 2019 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 "source/fuzz/uniform_buffer_element_descriptor.h"
#include <algorithm>
namespace spvtools {
namespace fuzz {
protobufs::UniformBufferElementDescriptor MakeUniformBufferElementDescriptor(
uint32_t descriptor_set, uint32_t binding,
std::vector<uint32_t>&& indices) {
protobufs::UniformBufferElementDescriptor result;
result.set_descriptor_set(descriptor_set);
result.set_binding(binding);
for (auto index : indices) {
result.add_index(index);
}
return result;
}
bool UniformBufferElementDescriptorEquals::operator()(
const protobufs::UniformBufferElementDescriptor* first,
const protobufs::UniformBufferElementDescriptor* second) const {
return first->descriptor_set() == second->descriptor_set() &&
first->binding() == second->binding() &&
first->index().size() == second->index().size() &&
std::equal(first->index().begin(), first->index().end(),
second->index().begin());
}
opt::Instruction* FindUniformVariable(
const protobufs::UniformBufferElementDescriptor&
uniform_buffer_element_descriptor,
opt::IRContext* context, bool check_unique) {
opt::Instruction* result = nullptr;
for (auto& inst : context->types_values()) {
// Consider all global variables with uniform storage class.
if (inst.opcode() != spv::Op::OpVariable) {
continue;
}
if (spv::StorageClass(inst.GetSingleWordInOperand(0)) !=
spv::StorageClass::Uniform) {
continue;
}
// Determine whether the variable is decorated with a descriptor set
// matching that in |uniform_buffer_element|.
bool descriptor_set_matches = false;
context->get_decoration_mgr()->ForEachDecoration(
inst.result_id(), uint32_t(spv::Decoration::DescriptorSet),
[&descriptor_set_matches, &uniform_buffer_element_descriptor](
const opt::Instruction& decoration_inst) {
const uint32_t kDescriptorSetOperandIndex = 2;
if (decoration_inst.GetSingleWordInOperand(
kDescriptorSetOperandIndex) ==
uniform_buffer_element_descriptor.descriptor_set()) {
descriptor_set_matches = true;
}
});
if (!descriptor_set_matches) {
// Descriptor set does not match.
continue;
}
// Determine whether the variable is decorated with a binding matching that
// in |uniform_buffer_element|.
bool binding_matches = false;
context->get_decoration_mgr()->ForEachDecoration(
inst.result_id(), uint32_t(spv::Decoration::Binding),
[&binding_matches, &uniform_buffer_element_descriptor](
const opt::Instruction& decoration_inst) {
const uint32_t kBindingOperandIndex = 2;
if (decoration_inst.GetSingleWordInOperand(kBindingOperandIndex) ==
uniform_buffer_element_descriptor.binding()) {
binding_matches = true;
}
});
if (!binding_matches) {
// Binding does not match.
continue;
}
// This instruction is a uniform variable with the right descriptor set and
// binding.
if (!check_unique) {
// If we aren't checking uniqueness, return it.
return &inst;
}
if (result) {
// More than one uniform variable is decorated with the given descriptor
// set and binding. This means the fact is ambiguous.
return nullptr;
}
result = &inst;
}
// We get here either if no match was found, or if |check_unique| holds and
// exactly one match was found.
assert(result == nullptr || check_unique);
return result;
}
} // namespace fuzz
} // namespace spvtools
|
