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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/*
* MRustC - Rust Compiler
* - By John Hodge (Mutabah/thePowersGang)
*
* mir/helpers.hpp
* - MIR Manipulation helpers
*/
#pragma once
#include <vector>
#include <functional>
#include <hir_typeck/static.hpp>
#include <mir/mir.hpp>
namespace HIR {
class Crate;
class TypeRef;
struct Pattern;
struct SimplePath;
}
namespace MIR {
class Function;
struct LValue;
class Constant;
struct BasicBlock;
class Terminator;
class Statement;
class RValue;
class Param;
typedef unsigned int BasicBlockId;
struct CheckFailure:
public ::std::exception
{
};
#define MIR_BUG(state, ...) do { (state).print_bug( [&](auto& _os){_os << __VA_ARGS__; } ); throw ""; } while(0)
#define MIR_ASSERT(state, cnd, ...) do { if( !(cnd) ) (state).print_bug( [&](auto& _os){_os << __FILE__ << ":" << __LINE__ << " ASSERT " #cnd " failed - " << __VA_ARGS__; } ); } while(0)
#define MIR_TODO(state, ...) do { (state).print_todo( [&](auto& _os){_os << __VA_ARGS__; } ); throw ""; } while(0)
#define MIR_DEBUG(state, ...) do { DEBUG(FMT_CB(_ss, (state).fmt_pos(_ss);) << __VA_ARGS__); } while(0)
class TypeResolve
{
public:
typedef ::std::vector< ::std::pair< ::HIR::Pattern, ::HIR::TypeRef> > args_t;
private:
const unsigned int STMT_TERM = ~0u;
public:
const Span& sp;
const ::StaticTraitResolve& m_resolve;
const ::HIR::Crate& m_crate;
private:
::FmtLambda m_path;
public:
const ::HIR::TypeRef& m_ret_type;
const args_t& m_args;
const ::MIR::Function& m_fcn;
private:
const ::HIR::SimplePath* m_lang_Box = nullptr;
unsigned int bb_idx = 0;
unsigned int stmt_idx = 0;
public:
TypeResolve(const Span& sp, const ::StaticTraitResolve& resolve, ::FmtLambda path, const ::HIR::TypeRef& ret_type, const args_t& args, const ::MIR::Function& fcn):
sp(sp),
m_resolve(resolve),
m_crate(resolve.m_crate),
m_path(path),
m_ret_type(ret_type),
m_args(args),
m_fcn(fcn)
{
if( m_crate.m_lang_items.count("owned_box") > 0 ) {
m_lang_Box = &m_crate.m_lang_items.at("owned_box");
}
}
void set_cur_stmt(const ::MIR::BasicBlock& bb, const ::MIR::Statement& stmt) {
assert(&stmt >= &bb.statements.front());
assert(&stmt <= &bb.statements.back());
this->set_cur_stmt(bb, &stmt - bb.statements.data());
}
void set_cur_stmt(const ::MIR::BasicBlock& bb, unsigned int stmt_idx) {
assert(&bb >= &m_fcn.blocks.front());
assert(&bb <= &m_fcn.blocks.back());
this->set_cur_stmt(&bb - m_fcn.blocks.data(), stmt_idx);
}
void set_cur_stmt(unsigned int bb_idx, unsigned int stmt_idx) {
this->bb_idx = bb_idx;
this->stmt_idx = stmt_idx;
}
void set_cur_stmt_term(const ::MIR::BasicBlock& bb) {
assert(&bb >= &m_fcn.blocks.front());
assert(&bb <= &m_fcn.blocks.back());
this->set_cur_stmt_term(&bb - m_fcn.blocks.data());
}
void set_cur_stmt_term(unsigned int bb_idx) {
this->bb_idx = bb_idx;
this->stmt_idx = STMT_TERM;
}
unsigned int get_cur_stmt_ofs() const;
void fmt_pos(::std::ostream& os, bool include_path=false) const;
void print_bug(::std::function<void(::std::ostream& os)> cb) const {
print_msg("ERROR", cb);
}
void print_todo(::std::function<void(::std::ostream& os)> cb) const {
print_msg("TODO", cb);
}
void print_msg(const char* tag, ::std::function<void(::std::ostream& os)> cb) const;
const ::MIR::BasicBlock& get_block(::MIR::BasicBlockId id) const;
const ::HIR::TypeRef& get_static_type(::HIR::TypeRef& tmp, const ::HIR::Path& path) const;
const ::HIR::TypeRef& get_lvalue_type(::HIR::TypeRef& tmp, const ::MIR::LValue& val, unsigned wrapper_skip_count=0) const;
const ::HIR::TypeRef& get_lvalue_type(::HIR::TypeRef& tmp, const ::MIR::LValue::CRef& val) const {
return get_lvalue_type(tmp, val.lv(), val.lv().m_wrappers.size() - val.wrapper_count());
}
const ::HIR::TypeRef& get_lvalue_type(::HIR::TypeRef& tmp, const ::MIR::LValue::MRef& val) const {
return get_lvalue_type(tmp, val.lv(), val.lv().m_wrappers.size() - val.wrapper_count());
}
const ::HIR::TypeRef& get_unwrapped_type(::HIR::TypeRef& tmp, const ::MIR::LValue::Wrapper& w, const ::HIR::TypeRef& ty) const;
const ::HIR::TypeRef& get_param_type(::HIR::TypeRef& tmp, const ::MIR::Param& val) const;
::HIR::TypeRef get_const_type(const ::MIR::Constant& c) const;
bool lvalue_is_copy(const ::MIR::LValue& val) const;
const ::HIR::TypeRef* is_type_owned_box(const ::HIR::TypeRef& ty) const;
friend ::std::ostream& operator<<(::std::ostream& os, const TypeResolve& x) {
x.fmt_pos(os);
return os;
}
};
// --------------------------------------------------------------------
// MIR_Helper_GetLifetimes
// --------------------------------------------------------------------
class ValueLifetime
{
::std::vector<bool> statements;
public:
ValueLifetime(::std::vector<bool> stmts):
statements( mv$(stmts) )
{}
bool valid_at(size_t ofs) const {
return statements.at(ofs);
}
// true if this value is used at any point
bool is_used() const {
for(auto v : statements)
if( v )
return true;
return false;
}
bool overlaps(const ValueLifetime& x) const {
assert(statements.size() == x.statements.size());
for(unsigned int i = 0; i < statements.size(); i ++)
{
if( statements[i] && x.statements[i] )
return true;
}
return false;
}
void unify(const ValueLifetime& x) {
assert(statements.size() == x.statements.size());
for(unsigned int i = 0; i < statements.size(); i ++)
{
if( x.statements[i] )
statements[i] = true;
}
}
};
struct ValueLifetimes
{
::std::vector<size_t> m_block_offsets;
::std::vector<ValueLifetime> m_slots;
bool slot_valid(unsigned idx, unsigned bb_idx, unsigned stmt_idx) const {
return m_slots.at(idx).valid_at( m_block_offsets[bb_idx] + stmt_idx );
}
};
namespace visit {
enum class ValUsage {
Move,
Read,
Write,
Borrow,
};
extern bool visit_mir_lvalue(const ::MIR::LValue& lv, ValUsage u, ::std::function<bool(const ::MIR::LValue& , ValUsage)> cb);
extern bool visit_mir_lvalue(const ::MIR::Param& p, ValUsage u, ::std::function<bool(const ::MIR::LValue& , ValUsage)> cb);
extern bool visit_mir_lvalues(const ::MIR::RValue& rval, ::std::function<bool(const ::MIR::LValue& , ValUsage)> cb);
extern bool visit_mir_lvalues(const ::MIR::Statement& stmt, ::std::function<bool(const ::MIR::LValue& , ValUsage)> cb);
extern bool visit_mir_lvalues(const ::MIR::Terminator& term, ::std::function<bool(const ::MIR::LValue& , ValUsage)> cb);
} // namespace visit
} // namespace MIR
extern ::MIR::ValueLifetimes MIR_Helper_GetLifetimes(::MIR::TypeResolve& state, const ::MIR::Function& fcn, bool dump_debug, const ::std::vector<bool>* mask=nullptr);
|
