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
120
121
122
123
124
125
126
127
128
129
130
131
132
|
//
// Copyright 2016 Francisco Jerez
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//
///
/// \file
/// Utility functions for LLVM IR metadata introspection.
///
#ifndef CLOVER_LLVM_METADATA_HPP
#define CLOVER_LLVM_METADATA_HPP
#include "llvm/compat.hpp"
#include "util/algorithm.hpp"
#include <vector>
#include <llvm/IR/Module.h>
#include <llvm/IR/Metadata.h>
namespace clover {
namespace llvm {
namespace detail {
inline std::vector<const ::llvm::MDNode *>
get_kernel_nodes(const ::llvm::Module &mod) {
if (const ::llvm::NamedMDNode *n =
mod.getNamedMetadata("opencl.kernels"))
return { n->op_begin(), n->op_end() };
else
return {};
}
inline std::function<bool (const ::llvm::MDNode *n)>
is_kernel_node_for(const ::llvm::Function &f) {
return [&](const ::llvm::MDNode *n) {
using ::llvm::mdconst::dyn_extract;
return &f == dyn_extract<::llvm::Function>(n->getOperand(0));
};
}
inline bool
is_kernel(const ::llvm::Function &f) {
#if HAVE_LLVM >= 0x0309
return f.getMetadata("kernel_arg_type");
#else
return clover::any_of(is_kernel_node_for(f),
get_kernel_nodes(*f.getParent()));
#endif
}
inline iterator_range<::llvm::MDNode::op_iterator>
get_kernel_metadata_operands(const ::llvm::Function &f,
const std::string &name) {
#if HAVE_LLVM >= 0x0309
// On LLVM v3.9+ kernel argument attributes are stored as
// function metadata.
const auto data_node = f.getMetadata(name);
return range(data_node->op_begin(), data_node->op_end());
#else
using ::llvm::cast;
using ::llvm::dyn_cast;
const auto kernel_node = find(is_kernel_node_for(f),
get_kernel_nodes(*f.getParent()));
const auto data_node = cast<::llvm::MDNode>(
find([&](const ::llvm::MDOperand &op) {
if (auto m = dyn_cast<::llvm::MDNode>(op))
if (m->getNumOperands())
if (auto m_name = dyn_cast<::llvm::MDString>(
m->getOperand(0).get()))
return m_name->getString() == name;
return false;
},
kernel_node->operands()));
// Skip the first operand node which is just the metadata
// attribute name.
return range(data_node->op_begin() + 1, data_node->op_end());
#endif
}
}
///
/// Extract the string metadata node \p name corresponding to the kernel
/// argument given by \p arg.
///
inline std::string
get_argument_metadata(const ::llvm::Function &f,
const ::llvm::Argument &arg,
const std::string &name) {
return ::llvm::cast<::llvm::MDString>(
detail::get_kernel_metadata_operands(f, name)[arg.getArgNo()])
->getString();
}
///
/// Return a vector with all CL kernel functions found in the LLVM
/// module \p mod.
///
inline std::vector<const ::llvm::Function *>
get_kernels(const ::llvm::Module &mod) {
std::vector<const ::llvm::Function *> fs;
for (auto &f : mod.getFunctionList()) {
if (detail::is_kernel(f))
fs.push_back(&f);
}
return fs;
}
}
}
#endif
|
