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Data flow: Work around functionality-induced misoptimization

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Tom Hvitved
2022-12-15 15:26:56 +01:00
parent 6eda042229
commit f8571dd0b6
39 changed files with 195 additions and 39 deletions
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6
cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImpl.qll
View File

@@ -622,7 +622,11 @@ private predicate parameterFlowThroughAllowed(ParamNodeEx p, ReturnKindExt kind)
}
private module Stage1 implements StageSig {
class Ap = Unit;
class Ap extends int {
// workaround for bad functionality-induced joins (happens when using `Unit`)
pragma[nomagic]
Ap() { this in [0 .. 1] and this < 1 }
}
private class Cc = boolean;

6
cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImpl2.qll
View File

@@ -622,7 +622,11 @@ private predicate parameterFlowThroughAllowed(ParamNodeEx p, ReturnKindExt kind)
}
private module Stage1 implements StageSig {
class Ap = Unit;
class Ap extends int {
// workaround for bad functionality-induced joins (happens when using `Unit`)
pragma[nomagic]
Ap() { this in [0 .. 1] and this < 1 }
}
private class Cc = boolean;

6
cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImpl3.qll
View File

@@ -622,7 +622,11 @@ private predicate parameterFlowThroughAllowed(ParamNodeEx p, ReturnKindExt kind)
}
private module Stage1 implements StageSig {
class Ap = Unit;
class Ap extends int {
// workaround for bad functionality-induced joins (happens when using `Unit`)
pragma[nomagic]
Ap() { this in [0 .. 1] and this < 1 }
}
private class Cc = boolean;

6
cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImpl4.qll
View File

@@ -622,7 +622,11 @@ private predicate parameterFlowThroughAllowed(ParamNodeEx p, ReturnKindExt kind)
}
private module Stage1 implements StageSig {
class Ap = Unit;
class Ap extends int {
// workaround for bad functionality-induced joins (happens when using `Unit`)
pragma[nomagic]
Ap() { this in [0 .. 1] and this < 1 }
}
private class Cc = boolean;

6
cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImplLocal.qll
View File

@@ -622,7 +622,11 @@ private predicate parameterFlowThroughAllowed(ParamNodeEx p, ReturnKindExt kind)
}
private module Stage1 implements StageSig {
class Ap = Unit;
class Ap extends int {
// workaround for bad functionality-induced joins (happens when using `Unit`)
pragma[nomagic]
Ap() { this in [0 .. 1] and this < 1 }
}
private class Cc = boolean;