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
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
|
// Use --mlir-disable-threading so that the AA queries are serialized
// as well as its diagnostic output.
// RUN: fir-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' -split-input-file --mlir-disable-threading 2>&1 | FileCheck %s
// CHECK-LABEL: Testing : "_QFPtest"
// p1.addr and p2.addr result from 2 different allocas
// They cannot physically alias
// CHECK-DAG: p1.addr#0 <-> p2.addr#0: NoAlias
// p1.addr and p2.addr could both be wrapped inside boxes
// CHECK-DAG: p1.addr#0 <-> boxp1.addr#0: MayAlias
// CHECK-DAG: p2.addr#0 <-> boxp1.addr#0: MayAlias
// TODO: To really see aliasing, we should be looking at a load of p1.addr
// p1.addr is just a local address holding the address to the data
// CHECK-DAG: p1.addr#0 <-> arg2.addr#0: NoAlias
// CHECK-DAG: p2.addr#0 <-> arg2.addr#0: NoAlias
// p1.addr and p2.addr are the result of an allocation
// They cannot physically alias with an argument
// CHECK-DAG: p1.addr#0 <-> func.region0#0: NoAlias
// CHECK-DAG: p2.addr#0 <-> func.region0#0: NoAlias
// CHECK-DAG: p1.addr#0 <-> func.region0#1: NoAlias
// CHECK-DAG: p2.addr#0 <-> func.region0#1: NoAlias
// CHECK-DAG: p1.addr#0 <-> func.region0#2: NoAlias
// CHECK-DAG: p2.addr#0 <-> func.region0#2: NoAlias
// All arguments are either pointers or targets
// A pointer in a box may alias with both
// CHECK-DAG: boxp1.addr#0 <-> func.region0#0: MayAlias
// CHECK-DAG: boxp1.addr#0 <-> func.region0#1: MayAlias
// CHECK-DAG: boxp1.addr#0 <-> func.region0#2: MayAlias
// A target dummy may alias with another target
// CHECK-DAG: func.region0#0 <-> func.region0#1: MayAlias
// arg2 is a reference to a pointer. Modifying arg2 could
// modify a target with a pointer component
// CHECK-DAG: arg2.load#0 <-> func.region0#0: MayAlias
// CHECK-DAG: arg2.load#0 <-> func.region0#1: MayAlias
// However, the address wrapped by arg2, can alias with any target or
// pointer arguments
// CHECK-DAG: arg2.addr#0 <-> func.region0#0: MayAlias
// CHECK-DAG: arg2.addr#0 <-> func.region0#1: MayAlias
// CHECK-DAG: arg2.load#0 <-> arg2.addr#0: MustAlias
// CHECK-DAG: boxp1.addr#0 <-> arg2.addr#0: MayAlias
func.func @_QFPtest(%arg0: !fir.ref<f32> {fir.bindc_name = "v1", fir.target}, %arg1: !fir.ref<f32> {fir.bindc_name = "v2", fir.target}, %arg2: !fir.ref<!fir.box<!fir.ptr<f32>>> ) attributes {test.ptr = "func"} {
%1 = fir.alloca !fir.ptr<f32> {test.ptr = "p1.addr"}
%2 = fir.zero_bits !fir.ptr<f32>
fir.store %2 to %1 : !fir.ref<!fir.ptr<f32>>
%4 = fir.alloca !fir.ptr<f32> {test.ptr = "p2.addr"}
fir.store %2 to %4 : !fir.ref<!fir.ptr<f32>>
%5 = fir.convert %arg0 : (!fir.ref<f32>) -> !fir.ptr<f32>
fir.store %5 to %1 : !fir.ref<!fir.ptr<f32>>
%6 = fir.convert %arg1 : (!fir.ref<f32>) -> !fir.ptr<f32>
fir.store %6 to %4 : !fir.ref<!fir.ptr<f32>>
%0 = fir.alloca !fir.box<!fir.ptr<f32>> {bindc_name = "p1", uniq_name = "_QFtestEp1"}
%7 = fir.load %1 : !fir.ref<!fir.ptr<f32>>
%8 = fir.embox %7 : (!fir.ptr<f32>) -> !fir.box<!fir.ptr<f32>>
fir.store %8 to %0 : !fir.ref<!fir.box<!fir.ptr<f32>>>
%3 = fir.alloca !fir.box<!fir.ptr<f32>> {bindc_name = "p2", uniq_name = "_QFtestEp2"}
%9 = fir.load %4 : !fir.ref<!fir.ptr<f32>>
%10 = fir.embox %9 : (!fir.ptr<f32>) -> !fir.box<!fir.ptr<f32>>
fir.store %10 to %3 : !fir.ref<!fir.box<!fir.ptr<f32>>>
%11 = fir.load %0 : !fir.ref<!fir.box<!fir.ptr<f32>>>
%12 = fir.box_addr %11 {test.ptr = "boxp1.addr"} : (!fir.box<!fir.ptr<f32>>) -> !fir.ptr<f32>
fir.store %12 to %1 : !fir.ref<!fir.ptr<f32>>
%13 = fir.load %3 : !fir.ref<!fir.box<!fir.ptr<f32>>>
%14 = fir.box_addr %13 : (!fir.box<!fir.ptr<f32>>) -> !fir.ptr<f32>
fir.store %14 to %4 : !fir.ref<!fir.ptr<f32>>
%15 = fir.load %arg2 {test.ptr = "arg2.load"} : !fir.ref<!fir.box<!fir.ptr<f32>>>
%16 = fir.box_addr %15 {test.ptr = "arg2.addr"} : (!fir.box<!fir.ptr<f32>>) -> !fir.ptr<f32>
return
}
// -----
// CHECK-LABEL: Testing : "_QFPtest2"
// subroutine test2(v1,p1,p2)
// real, target :: v1
// real, pointer :: p1, p2
// ...
// end subroutine
// Direct access to dummy POINTER references can modify other dummy POINTER references
// CHECK-DAG: func.region0#1 <-> func.region0#2: MayAlias
// They can also modify targets that have pointer components
// CHECK-DAG: arg1.load#0 <-> func.region0#0: MayAlias
// CHECK-DAG: arg2.load#0 <-> func.region0#0: MayAlias
func.func @_QFPtest2(%arg0: !fir.ref<f32> {fir.bindc_name = "v1", fir.target}, %arg1: !fir.ref<!fir.box<!fir.ptr<f32>>>, %arg2: !fir.ref<!fir.box<!fir.ptr<f32>>> ) attributes {test.ptr = "func"} {
%0 = fir.load %arg1 {test.ptr = "arg1.load"} : !fir.ref<!fir.box<!fir.ptr<f32>>>
%1 = fir.load %arg2 {test.ptr = "arg2.load"} : !fir.ref<!fir.box<!fir.ptr<f32>>>
return
}
// -----
// CHECK-LABEL: Testing : "_QFPtest3"
// module pointers
// real, pointer :: p
// end module
//
// program main
// use pointers
// real, target :: var1 = 1, var2 =2
// p => var1
//
// call test3(p)
//
// contains
// subroutine test3(p1)
// real, pointer :: p1
// p1 => var2
// print *, p
// end subroutine
// end
// The global pointer p may alias with the dummy argument p1
// but not with the dummy arg1 which is just a regular dummy
// CHECK-DAG: p#0 <-> func.region0#0: MayAlias
// CHECK-DAG: p#0 <-> func.region0#1: NoAlias
// p could be pointing to var2
// var2, being a target, could also be passed as argument arg0
// This was the wrong question to ask. We are asking if the address of box _QMpointersEp can
// alias with the wrapped scalar _QFEvar2. We meant box_addr of _QMpointersEp
// CHECK-DAG: p#0 <-> box.addr#0: NoAlias
// Handling gracefully the difference between !fir.ref<!fir.box<>> and !fir.box<>
// CHECK-DAG: box.addr#0 <-> func.region0#0: NoAlias
// var2, although it is a target, cannot alias with p
// A modification of p would only make them point to a new target but not modify it
// CHECK-DAG: var2#0 <-> p#0: NoAlias
// It can alias with p1, if p1 is a pointer component
// CHECK-DAG: arg0.load#0 <-> var2#0: MayAlias
// It is the same as box.addr
// CHECK-DAG: var2#0 <-> box.addr#0: MustAlias
// A global may not alias with a dummy
// CHECK-DAG: var2#0 <-> func.region0#1: NoAlias
// A pointer may only alias with a target but arg1 is a regular dummy
// CHECK-DAG: box.addr#0 <-> func.region0#1: NoAlias
// Dummy argument do not alias
// CHECK-DAG: func.region0#0 <-> func.region0#1: NoAlias
fir.global @_QMpointersEp : !fir.box<!fir.ptr<f32>> {
%0 = fir.zero_bits !fir.ptr<f32>
%1 = fir.embox %0 : (!fir.ptr<f32>) -> !fir.box<!fir.ptr<f32>>
fir.has_value %1 : !fir.box<!fir.ptr<f32>>
}
fir.global internal @_QFEvar2 target : f32 {
%cst = arith.constant 2.000000e+00 : f32
fir.has_value %cst : f32
}
func.func @_QFPtest3(%arg0: !fir.ref<!fir.box<!fir.ptr<f32>>> {fir.bindc_name = "p1"}, %arg1: !fir.ref<f32>) attributes {test.ptr = "func"} {
%3 = fir.load %arg0 {test.ptr = "arg0.load"}: !fir.ref<!fir.box<!fir.ptr<f32>>>
%4 = fir.address_of(@_QFEvar2) {test.ptr = "var2"} : !fir.ref<f32>
%5 = fir.address_of(@_QMpointersEp) {test.ptr = "p"} : !fir.ref<!fir.box<!fir.ptr<f32>>>
%6 = fir.embox %4 : (!fir.ref<f32>) -> !fir.box<!fir.ptr<f32>>
%13 = fir.box_addr %6 {test.ptr = "box.addr"} : (!fir.box<!fir.ptr<f32>>) -> !fir.ptr<f32>
return
}
// -----
// CHECK-LABEL: Testing : "_QFPtest4"
// Same as test3 but check that the alias analysis can follow (hl)fir.declare
// operations
// CHECK-DAG: p#0 <-> func.region0#0: MayAlias
// CHECK-DAG: p_fir#0 <-> func.region0#0: MayAlias
// CHECK-DAG: p_hlfir#0 <-> func.region0#0: MayAlias
// CHECK-DAG: p_hlfir#1 <-> func.region0#0: MayAlias
// CHECK-DAG: p#0 <-> func.region0#1: NoAlias
// CHECK-DAG: p_fir#0 <-> func.region0#1: NoAlias
// CHECK-DAG: p_hlfir#0 <-> func.region0#1: NoAlias
// CHECK-DAG: p_hlfir#1 <-> func.region0#1: NoAlias
// CHECK-DAG: var2#0 <-> p#0: NoAlias
// CHECK-DAG: var2#0 <-> p_fir#0: NoAlias
// CHECK-DAG: var2#0 <-> p_hlfir#0: NoAlias
// CHECK-DAG: var2#0 <-> p_hlfir#1: NoAlias
// CHECK-DAG: var2_fir#0 <-> p#0: NoAlias
// CHECK-DAG: var2_fir#0 <-> p_fir#0: NoAlias
// CHECK-DAG: var2_fir#0 <-> p_hlfir#0: NoAlias
// CHECK-DAG: var2_fir#0 <-> p_hlfir#1: NoAlias
// CHECK-DAG: var2_hlfir#0 <-> p#0: NoAlias
// CHECK-DAG: var2_hlfir#0 <-> p_fir#0: NoAlias
// CHECK-DAG: var2_hlfir#0 <-> p_hlfir#0: NoAlias
// CHECK-DAG: var2_hlfir#0 <-> p_hlfir#1: NoAlias
// CHECK-DAG: var2_hlfir#1 <-> p#0: NoAlias
// CHECK-DAG: var2_hlfir#1 <-> p_fir#0: NoAlias
// CHECK-DAG: var2_hlfir#1 <-> p_hlfir#0: NoAlias
// CHECK-DAG: var2_hlfir#1 <-> p_hlfir#1: NoAlias
// The data cannot alias with the box references
// CHECK-DAG: var2#0 <-> func.region0#0: NoAlias
// CHECK-DAG: var2_fir#0 <-> func.region0#0: NoAlias
// CHECK-DAG: var2_hlfir#0 <-> func.region0#0: NoAlias
// CHECK-DAG: var2_hlfir#1 <-> func.region0#0: NoAlias
// But it can alias with the box's own data
// CHECK-DAG: arg0.load#0 <-> var2#0: MayAlias
// CHECK-DAG: arg0.load#0 <-> var2_fir#0: MayAlias
// CHECK-DAG: arg0.load#0 <-> var2_hlfir#0: MayAlias
// CHECK-DAG: arg0.load#0 <-> var2_hlfir#1: MayAlias
// CHECK-DAG: var2#0 <-> box.addr#0: MustAlias
// CHECK-DAG: var2#0 <-> box.addr_fir#0: MustAlias
// CHECK-DAG: var2#0 <-> box.addr_hlfir#0: MustAlias
// CHECK-DAG: var2#0 <-> box.addr_hlfir#1: MustAlias
// CHECK-DAG: var2_fir#0 <-> box.addr#0: MustAlias
// CHECK-DAG: var2_fir#0 <-> box.addr_fir#0: MustAlias
// CHECK-DAG: var2_fir#0 <-> box.addr_hlfir#0: MustAlias
// CHECK-DAG: var2_fir#0 <-> box.addr_hlfir#1: MustAlias
// CHECK-DAG: var2_hlfir#0 <-> box.addr#0: MustAlias
// CHECK-DAG: var2_hlfir#0 <-> box.addr_fir#0: MustAlias
// CHECK-DAG: var2_hlfir#0 <-> box.addr_hlfir#0: MustAlias
// CHECK-DAG: var2_hlfir#0 <-> box.addr_hlfir#1: MustAlias
// CHECK-DAG: var2_hlfir#1 <-> box.addr#0: MustAlias
// CHECK-DAG: var2_hlfir#1 <-> box.addr_fir#0: MustAlias
// CHECK-DAG: var2_hlfir#1 <-> box.addr_hlfir#0: MustAlias
// CHECK-DAG: var2_hlfir#1 <-> box.addr_hlfir#1: MustAlias
// CHECK-DAG: var2#0 <-> func.region0#1: NoAlias
// CHECK-DAG: var2_fir#0 <-> func.region0#1: NoAlias
// CHECK-DAG: var2_hlfir#0 <-> func.region0#1: NoAlias
// CHECK-DAG: var2_hlfir#1 <-> func.region0#1: NoAlias
// CHECK-DAG: func.region0#0 <-> func.region0#1: NoAlias
fir.global @_QMpointersEp : !fir.box<!fir.ptr<f32>> {
%0 = fir.zero_bits !fir.ptr<f32>
%1 = fir.embox %0 : (!fir.ptr<f32>) -> !fir.box<!fir.ptr<f32>>
fir.has_value %1 : !fir.box<!fir.ptr<f32>>
}
fir.global internal @_QFEvar2 target : f32 {
%cst = arith.constant 2.000000e+00 : f32
fir.has_value %cst : f32
}
func.func @_QFPtest4(%arg0: !fir.ref<!fir.box<!fir.ptr<f32>>> {fir.bindc_name = "p1"}, %arg1: !fir.ref<f32>) attributes {test.ptr = "func"} {
%3 = fir.load %arg0 {test.ptr = "arg0.load"} : !fir.ref<!fir.box<!fir.ptr<f32>>>
%4 = fir.address_of(@_QFEvar2) {test.ptr = "var2"} : !fir.ref<f32>
%fir_decl_var2 = fir.declare %4 {uniq_name = "var2_fir", test.ptr = "var2_fir"}: (!fir.ref<f32>) -> !fir.ref<f32>
%hlfir_decl_var2:2 = hlfir.declare %4 {uniq_name = "var2_hlfir", test.ptr = "var2_hlfir"}: (!fir.ref<f32>) -> (!fir.ref<f32>, !fir.ref<f32>)
%5 = fir.address_of(@_QMpointersEp) {test.ptr = "p"} : !fir.ref<!fir.box<!fir.ptr<f32>>>
%fir_decl_p = fir.declare %5 {uniq_name = "p_fir", test.ptr = "p_fir"}: (!fir.ref<!fir.box<!fir.ptr<f32>>>) -> !fir.ref<!fir.box<!fir.ptr<f32>>>
%hlfir_decl_p:2 = hlfir.declare %5 {uniq_name = "p_hlfir", test.ptr = "p_hlfir"}: (!fir.ref<!fir.box<!fir.ptr<f32>>>) -> (!fir.ref<!fir.box<!fir.ptr<f32>>>, !fir.ref<!fir.box<!fir.ptr<f32>>>)
%13 = fir.convert %4 {test.ptr = "box.addr"} : (!fir.ref<f32>) -> !fir.ptr<f32>
%fir_decl_convert = fir.declare %13 {uniq_name = "box_addr_fir", test.ptr = "box.addr_fir"}: (!fir.ptr<f32>) -> !fir.ptr<f32>
%hlfir_decl_convert:2 = hlfir.declare %13 {uniq_name = "box_addr_hlfir", test.ptr = "box.addr_hlfir"}: (!fir.ptr<f32>) -> (!fir.ptr<f32>, !fir.ptr<f32>)
return
}
|
