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
133
134
135
136
137
138
139
140
|
//===-- lib/Semantics/canonicalize-directives.cpp -------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "canonicalize-directives.h"
#include "flang/Parser/parse-tree-visitor.h"
#include "flang/Semantics/tools.h"
namespace Fortran::semantics {
using namespace parser::literals;
// Check that directives are associated with the correct constructs.
// Directives that need to be associated with other constructs in the execution
// part are moved to the execution part so they can be checked there.
class CanonicalizationOfDirectives {
public:
CanonicalizationOfDirectives(parser::Messages &messages)
: messages_{messages} {}
template <typename T> bool Pre(T &) { return true; }
template <typename T> void Post(T &) {}
// Move directives that must appear in the Execution part out of the
// Specification part.
void Post(parser::SpecificationPart &spec);
bool Pre(parser::ExecutionPart &x);
// Ensure that directives associated with constructs appear accompanying the
// construct.
void Post(parser::Block &block);
private:
// Ensure that loop directives appear immediately before a loop.
void CheckLoopDirective(parser::CompilerDirective &dir, parser::Block &block,
std::list<parser::ExecutionPartConstruct>::iterator it);
parser::Messages &messages_;
// Directives to be moved to the Execution part from the Specification part.
std::list<common::Indirection<parser::CompilerDirective>>
directivesToConvert_;
};
bool CanonicalizeDirectives(
parser::Messages &messages, parser::Program &program) {
CanonicalizationOfDirectives dirs{messages};
Walk(program, dirs);
return !messages.AnyFatalError();
}
static bool IsExecutionDirective(const parser::CompilerDirective &dir) {
return std::holds_alternative<parser::CompilerDirective::VectorAlways>(
dir.u) ||
std::holds_alternative<parser::CompilerDirective::Unroll>(dir.u) ||
std::holds_alternative<parser::CompilerDirective::UnrollAndJam>(dir.u) ||
std::holds_alternative<parser::CompilerDirective::NoVector>(dir.u) ||
std::holds_alternative<parser::CompilerDirective::NoUnroll>(dir.u) ||
std::holds_alternative<parser::CompilerDirective::NoUnrollAndJam>(dir.u);
}
void CanonicalizationOfDirectives::Post(parser::SpecificationPart &spec) {
auto &list{
std::get<std::list<common::Indirection<parser::CompilerDirective>>>(
spec.t)};
for (auto it{list.begin()}; it != list.end();) {
if (IsExecutionDirective(it->value())) {
directivesToConvert_.emplace_back(std::move(*it));
it = list.erase(it);
} else {
++it;
}
}
}
bool CanonicalizationOfDirectives::Pre(parser::ExecutionPart &x) {
auto origFirst{x.v.begin()};
for (auto &dir : directivesToConvert_) {
x.v.insert(origFirst,
parser::ExecutionPartConstruct{
parser::ExecutableConstruct{std::move(dir)}});
}
directivesToConvert_.clear();
return true;
}
void CanonicalizationOfDirectives::CheckLoopDirective(
parser::CompilerDirective &dir, parser::Block &block,
std::list<parser::ExecutionPartConstruct>::iterator it) {
// Skip over this and other compiler directives
while (it != block.end() && parser::Unwrap<parser::CompilerDirective>(*it)) {
++it;
}
if (it == block.end() ||
(!parser::Unwrap<parser::DoConstruct>(*it) &&
!parser::Unwrap<parser::OpenACCLoopConstruct>(*it) &&
!parser::Unwrap<parser::OpenACCCombinedConstruct>(*it))) {
std::string s{parser::ToUpperCaseLetters(dir.source.ToString())};
s.pop_back(); // Remove trailing newline from source string
messages_.Say(
dir.source, "A DO loop must follow the %s directive"_warn_en_US, s);
}
}
void CanonicalizationOfDirectives::Post(parser::Block &block) {
for (auto it{block.begin()}; it != block.end(); ++it) {
if (auto *dir{parser::Unwrap<parser::CompilerDirective>(*it)}) {
std::visit(
common::visitors{[&](parser::CompilerDirective::VectorAlways &) {
CheckLoopDirective(*dir, block, it);
},
[&](parser::CompilerDirective::Unroll &) {
CheckLoopDirective(*dir, block, it);
},
[&](parser::CompilerDirective::UnrollAndJam &) {
CheckLoopDirective(*dir, block, it);
},
[&](parser::CompilerDirective::NoVector &) {
CheckLoopDirective(*dir, block, it);
},
[&](parser::CompilerDirective::NoUnroll &) {
CheckLoopDirective(*dir, block, it);
},
[&](parser::CompilerDirective::NoUnrollAndJam &) {
CheckLoopDirective(*dir, block, it);
},
[&](auto &) {}},
dir->u);
}
}
}
} // namespace Fortran::semantics
|
