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Merge pull request #19044 from aschackmull/ssa/useuse-trim
Ssa: Trim the use-use relation to skip irrelevant nodes
2 parents f2f5739 + c6cee48 commit 0c74f21

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-3115
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22 files changed

+1577
-3115
lines changed

‎cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/SsaInternals.qll‎

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1007,9 +1007,11 @@ private module DataFlowIntegrationInput implements SsaImpl::DataFlowIntegrationI
10071007
}
10081008
}
10091009

1010-
predicate guardControlsBlock(Guard guard, SsaInput::BasicBlock bb, boolean branch) {
1010+
predicate guardDirectlyControlsBlock(Guard guard, SsaInput::BasicBlock bb, boolean branch) {
10111011
guard.(IRGuards::IRGuardCondition).controls(bb, branch)
10121012
}
1013+
1014+
predicate keepAllPhiInputBackEdges() { any() }
10131015
}
10141016

10151017
private module DataFlowIntegrationImpl = SsaImpl::DataFlowIntegration<DataFlowIntegrationInput>;

‎cpp/ql/test/library-tests/dataflow/dataflow-tests/localFlow-ir.expected‎

Lines changed: 7 additions & 15 deletions
Original file line numberDiff line numberDiff line change
@@ -68,31 +68,23 @@
6868
| test.cpp:10:8:10:9 | t2 | test.cpp:11:7:11:8 | [input] SSA phi read(t2) |
6969
| test.cpp:10:8:10:9 | t2 | test.cpp:11:7:11:8 | [input] SSA phi(*t2) |
7070
| test.cpp:10:8:10:9 | t2 | test.cpp:13:10:13:11 | t2 |
71-
| test.cpp:11:7:11:8 | [input] SSA phi read(t2) | test.cpp:15:3:15:6 | SSA phi read(t2) |
72-
| test.cpp:11:7:11:8 | [input] SSA phi(*t2) | test.cpp:15:3:15:6 | SSA phi(*t2) |
71+
| test.cpp:11:7:11:8 | [input] SSA phi read(t2) | test.cpp:15:8:15:9 | t2 |
72+
| test.cpp:11:7:11:8 | [input] SSA phi(*t2) | test.cpp:15:8:15:9 | t2 |
7373
| test.cpp:11:7:11:8 | t1 | test.cpp:21:8:21:9 | t1 |
7474
| test.cpp:12:5:12:10 | ... = ... | test.cpp:13:10:13:11 | t2 |
7575
| test.cpp:12:10:12:10 | 0 | test.cpp:12:5:12:10 | ... = ... |
76-
| test.cpp:13:5:13:8 | [input] SSA phi read(t2) | test.cpp:15:3:15:6 | SSA phi read(t2) |
77-
| test.cpp:13:5:13:8 | [input] SSA phi(*t2) | test.cpp:15:3:15:6 | SSA phi(*t2) |
78-
| test.cpp:13:10:13:11 | t2 | test.cpp:13:5:13:8 | [input] SSA phi read(t2) |
79-
| test.cpp:13:10:13:11 | t2 | test.cpp:13:5:13:8 | [input] SSA phi(*t2) |
80-
| test.cpp:15:3:15:6 | SSA phi read(t2) | test.cpp:15:8:15:9 | t2 |
81-
| test.cpp:15:3:15:6 | SSA phi(*t2) | test.cpp:15:8:15:9 | t2 |
76+
| test.cpp:13:10:13:11 | t2 | test.cpp:15:8:15:9 | t2 |
77+
| test.cpp:13:10:13:11 | t2 | test.cpp:15:8:15:9 | t2 |
8278
| test.cpp:15:8:15:9 | t2 | test.cpp:23:15:23:16 | [input] SSA phi read(*t2) |
8379
| test.cpp:15:8:15:9 | t2 | test.cpp:23:15:23:16 | [input] SSA phi read(t2) |
8480
| test.cpp:17:3:17:8 | ... = ... | test.cpp:21:8:21:9 | t1 |
8581
| test.cpp:17:8:17:8 | 0 | test.cpp:17:3:17:8 | ... = ... |
86-
| test.cpp:21:8:21:9 | t1 | test.cpp:23:15:23:16 | [input] SSA phi read(t1) |
87-
| test.cpp:21:8:21:9 | t1 | test.cpp:23:15:23:16 | [input] SSA phi(*t1) |
82+
| test.cpp:21:8:21:9 | t1 | test.cpp:23:19:23:19 | SSA phi read(t1) |
83+
| test.cpp:21:8:21:9 | t1 | test.cpp:23:19:23:19 | SSA phi(*t1) |
8884
| test.cpp:23:15:23:16 | 0 | test.cpp:23:15:23:16 | 0 |
89-
| test.cpp:23:15:23:16 | 0 | test.cpp:23:15:23:16 | [input] SSA phi(*i) |
85+
| test.cpp:23:15:23:16 | 0 | test.cpp:23:19:23:19 | SSA phi(*i) |
9086
| test.cpp:23:15:23:16 | [input] SSA phi read(*t2) | test.cpp:23:19:23:19 | SSA phi read(*t2) |
91-
| test.cpp:23:15:23:16 | [input] SSA phi read(i) | test.cpp:23:19:23:19 | SSA phi read(i) |
92-
| test.cpp:23:15:23:16 | [input] SSA phi read(t1) | test.cpp:23:19:23:19 | SSA phi read(t1) |
9387
| test.cpp:23:15:23:16 | [input] SSA phi read(t2) | test.cpp:23:19:23:19 | SSA phi read(t2) |
94-
| test.cpp:23:15:23:16 | [input] SSA phi(*i) | test.cpp:23:19:23:19 | SSA phi(*i) |
95-
| test.cpp:23:15:23:16 | [input] SSA phi(*t1) | test.cpp:23:19:23:19 | SSA phi(*t1) |
9688
| test.cpp:23:19:23:19 | SSA phi read(*t2) | test.cpp:24:10:24:11 | t2 |
9789
| test.cpp:23:19:23:19 | SSA phi read(i) | test.cpp:23:19:23:19 | i |
9890
| test.cpp:23:19:23:19 | SSA phi read(t1) | test.cpp:23:23:23:24 | t1 |

‎csharp/ql/lib/semmle/code/csharp/dataflow/internal/SsaImpl.qll‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1062,7 +1062,7 @@ private module DataFlowIntegrationInput implements Impl::DataFlowIntegrationInpu
10621062
}
10631063

10641064
/** Holds if the guard `guard` controls block `bb` upon evaluating to `branch`. */
1065-
predicate guardControlsBlock(Guard guard, ControlFlow::BasicBlock bb, boolean branch) {
1065+
predicate guardDirectlyControlsBlock(Guard guard, ControlFlow::BasicBlock bb, boolean branch) {
10661066
exists(ConditionBlock conditionBlock, ControlFlow::SuccessorTypes::ConditionalSuccessor s |
10671067
guard.getAControlFlowNode() = conditionBlock.getLastNode() and
10681068
s.getValue() = branch and

‎csharp/ql/test/library-tests/csharp7/LocalTaintFlow.expected‎

Lines changed: 7 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -252,26 +252,25 @@
252252
| CSharp7.cs:233:28:233:29 | access to local variable i1 | CSharp7.cs:235:38:235:39 | access to local variable i1 |
253253
| CSharp7.cs:233:28:233:33 | ... > ... | CSharp7.cs:233:13:233:33 | [false] ... && ... |
254254
| CSharp7.cs:233:28:233:33 | ... > ... | CSharp7.cs:233:13:233:33 | [true] ... && ... |
255-
| CSharp7.cs:235:13:235:42 | [input] SSA phi read(o) | CSharp7.cs:248:9:274:9 | SSA phi read(o) |
255+
| CSharp7.cs:235:13:235:42 | [input] SSA phi read(o) | CSharp7.cs:248:17:248:17 | access to local variable o |
256256
| CSharp7.cs:235:33:235:36 | "int " | CSharp7.cs:235:31:235:41 | $"..." |
257257
| CSharp7.cs:235:38:235:39 | access to local variable i1 | CSharp7.cs:235:31:235:41 | $"..." |
258258
| CSharp7.cs:237:18:237:18 | access to local variable o | CSharp7.cs:237:23:237:31 | String s1 |
259259
| CSharp7.cs:237:18:237:18 | access to local variable o | CSharp7.cs:239:13:239:45 | [input] SSA phi read(o) |
260260
| CSharp7.cs:237:18:237:18 | access to local variable o | CSharp7.cs:241:18:241:18 | access to local variable o |
261261
| CSharp7.cs:237:23:237:31 | SSA def(s1) | CSharp7.cs:239:41:239:42 | access to local variable s1 |
262262
| CSharp7.cs:237:23:237:31 | String s1 | CSharp7.cs:237:23:237:31 | SSA def(s1) |
263-
| CSharp7.cs:239:13:239:45 | [input] SSA phi read(o) | CSharp7.cs:248:9:274:9 | SSA phi read(o) |
263+
| CSharp7.cs:239:13:239:45 | [input] SSA phi read(o) | CSharp7.cs:248:17:248:17 | access to local variable o |
264264
| CSharp7.cs:239:33:239:39 | "string " | CSharp7.cs:239:31:239:44 | $"..." |
265265
| CSharp7.cs:239:41:239:42 | access to local variable s1 | CSharp7.cs:239:31:239:44 | $"..." |
266266
| CSharp7.cs:241:18:241:18 | access to local variable o | CSharp7.cs:242:9:243:9 | [input] SSA phi read(o) |
267267
| CSharp7.cs:241:18:241:18 | access to local variable o | CSharp7.cs:244:18:244:18 | access to local variable o |
268-
| CSharp7.cs:242:9:243:9 | [input] SSA phi read(o) | CSharp7.cs:248:9:274:9 | SSA phi read(o) |
268+
| CSharp7.cs:242:9:243:9 | [input] SSA phi read(o) | CSharp7.cs:248:17:248:17 | access to local variable o |
269269
| CSharp7.cs:244:18:244:18 | access to local variable o | CSharp7.cs:244:18:244:28 | [input] SSA phi read(o) |
270270
| CSharp7.cs:244:18:244:18 | access to local variable o | CSharp7.cs:244:23:244:28 | Object v1 |
271271
| CSharp7.cs:244:18:244:18 | access to local variable o | CSharp7.cs:245:9:246:9 | [input] SSA phi read(o) |
272-
| CSharp7.cs:244:18:244:28 | [input] SSA phi read(o) | CSharp7.cs:248:9:274:9 | SSA phi read(o) |
273-
| CSharp7.cs:245:9:246:9 | [input] SSA phi read(o) | CSharp7.cs:248:9:274:9 | SSA phi read(o) |
274-
| CSharp7.cs:248:9:274:9 | SSA phi read(o) | CSharp7.cs:248:17:248:17 | access to local variable o |
272+
| CSharp7.cs:244:18:244:28 | [input] SSA phi read(o) | CSharp7.cs:248:17:248:17 | access to local variable o |
273+
| CSharp7.cs:245:9:246:9 | [input] SSA phi read(o) | CSharp7.cs:248:17:248:17 | access to local variable o |
275274
| CSharp7.cs:248:17:248:17 | access to local variable o | CSharp7.cs:254:27:254:27 | access to local variable o |
276275
| CSharp7.cs:248:17:248:17 | access to local variable o | CSharp7.cs:257:18:257:23 | Int32 i2 |
277276
| CSharp7.cs:248:17:248:17 | access to local variable o | CSharp7.cs:260:18:260:23 | Int32 i3 |
@@ -312,10 +311,8 @@
312311
| CSharp7.cs:285:39:285:42 | access to local variable list | CSharp7.cs:287:36:287:39 | access to local variable list |
313312
| CSharp7.cs:287:36:287:39 | access to local variable list | CSharp7.cs:289:32:289:35 | access to local variable list |
314313
| CSharp7.cs:297:18:297:18 | access to local variable x | CSharp7.cs:297:18:297:22 | SSA def(x) |
315-
| CSharp7.cs:297:18:297:22 | SSA def(x) | CSharp7.cs:297:18:297:22 | [input] SSA phi(x) |
316-
| CSharp7.cs:297:18:297:22 | [input] SSA phi(x) | CSharp7.cs:297:25:297:25 | SSA phi(x) |
314+
| CSharp7.cs:297:18:297:22 | SSA def(x) | CSharp7.cs:297:25:297:25 | access to local variable x |
317315
| CSharp7.cs:297:22:297:22 | 0 | CSharp7.cs:297:18:297:18 | access to local variable x |
318-
| CSharp7.cs:297:25:297:25 | SSA phi(x) | CSharp7.cs:297:25:297:25 | access to local variable x |
319316
| CSharp7.cs:297:25:297:25 | access to local variable x | CSharp7.cs:297:25:297:30 | ... < ... |
320317
| CSharp7.cs:297:25:297:25 | access to local variable x | CSharp7.cs:297:35:297:35 | access to local variable x |
321318
| CSharp7.cs:297:25:297:30 | ... < ... | CSharp7.cs:297:25:297:44 | [false] ... && ... |
@@ -326,6 +323,5 @@
326323
| CSharp7.cs:297:35:297:44 | [true] ... is ... | CSharp7.cs:297:25:297:44 | [true] ... && ... |
327324
| CSharp7.cs:297:40:297:44 | Int32 y | CSharp7.cs:297:40:297:44 | SSA def(y) |
328325
| CSharp7.cs:297:40:297:44 | SSA def(y) | CSharp7.cs:299:31:299:31 | access to local variable y |
329-
| CSharp7.cs:297:47:297:49 | SSA def(x) | CSharp7.cs:297:47:297:49 | [input] SSA phi(x) |
330-
| CSharp7.cs:297:47:297:49 | [input] SSA phi(x) | CSharp7.cs:297:25:297:25 | SSA phi(x) |
326+
| CSharp7.cs:297:47:297:49 | SSA def(x) | CSharp7.cs:297:25:297:25 | access to local variable x |
331327
| CSharp7.cs:297:49:297:49 | access to local variable x | CSharp7.cs:297:47:297:49 | SSA def(x) |

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