[clang] 75c22b3 - [clang][dataflow] Add a transfer function for CXXBoolLiteralExpr
Stanislav Gatev via cfe-commits
cfe-commits at lists.llvm.org
Wed Jan 26 07:37:26 PST 2022
Author: Stanislav Gatev
Date: 2022-01-26T15:33:00Z
New Revision: 75c22b382f2a7b0bb9499215a3d64e146e3f02cc
URL: https://github.com/llvm/llvm-project/commit/75c22b382f2a7b0bb9499215a3d64e146e3f02cc
DIFF: https://github.com/llvm/llvm-project/commit/75c22b382f2a7b0bb9499215a3d64e146e3f02cc.diff
LOG: [clang][dataflow] Add a transfer function for CXXBoolLiteralExpr
This is part of the implementation of the dataflow analysis framework.
See "[RFC] A dataflow analysis framework for Clang AST" on cfe-dev.
Reviewed-by: xazax.hun
Differential Revision: https://reviews.llvm.org/D118236
Added:
Modified:
clang/lib/Analysis/FlowSensitive/Transfer.cpp
clang/unittests/Analysis/FlowSensitive/TransferTest.cpp
Removed:
################################################################################
diff --git a/clang/lib/Analysis/FlowSensitive/Transfer.cpp b/clang/lib/Analysis/FlowSensitive/Transfer.cpp
index 7c5e063278d78..51a86b727e339 100644
--- a/clang/lib/Analysis/FlowSensitive/Transfer.cpp
+++ b/clang/lib/Analysis/FlowSensitive/Transfer.cpp
@@ -443,8 +443,11 @@ class TransferVisitor : public ConstStmtVisitor<TransferVisitor> {
// FIXME: Implement array initialization.
}
- // FIXME: Add support for:
- // - CXXBoolLiteralExpr
+ void VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *S) {
+ auto &Loc = Env.createStorageLocation(*S);
+ Env.setStorageLocation(*S, Loc);
+ Env.setValue(Loc, Env.getBoolLiteralValue(S->getValue()));
+ }
private:
Environment &Env;
diff --git a/clang/unittests/Analysis/FlowSensitive/TransferTest.cpp b/clang/unittests/Analysis/FlowSensitive/TransferTest.cpp
index dc365d5bfe75f..30238a40fec59 100644
--- a/clang/unittests/Analysis/FlowSensitive/TransferTest.cpp
+++ b/clang/unittests/Analysis/FlowSensitive/TransferTest.cpp
@@ -1970,4 +1970,39 @@ TEST_F(TransferTest, AssignToUnionMember) {
});
}
+TEST_F(TransferTest, AssignFromBoolLiteral) {
+ std::string Code = R"(
+ void target() {
+ bool Foo = true;
+ bool Bar = false;
+ // [[p]]
+ }
+ )";
+ runDataflow(
+ Code, [](llvm::ArrayRef<
+ std::pair<std::string, DataflowAnalysisState<NoopLattice>>>
+ Results,
+ ASTContext &ASTCtx) {
+ ASSERT_THAT(Results, ElementsAre(Pair("p", _)));
+ const Environment &Env = Results[0].second.Env;
+
+ const ValueDecl *FooDecl = findValueDecl(ASTCtx, "Foo");
+ ASSERT_THAT(FooDecl, NotNull());
+
+ const auto *FooVal =
+ dyn_cast_or_null<BoolValue>(Env.getValue(*FooDecl, SkipPast::None));
+ ASSERT_THAT(FooVal, NotNull());
+
+ const ValueDecl *BarDecl = findValueDecl(ASTCtx, "Bar");
+ ASSERT_THAT(BarDecl, NotNull());
+
+ const auto *BarVal =
+ dyn_cast_or_null<BoolValue>(Env.getValue(*BarDecl, SkipPast::None));
+ ASSERT_THAT(BarVal, NotNull());
+
+ EXPECT_EQ(FooVal, &Env.getBoolLiteralValue(true));
+ EXPECT_EQ(BarVal, &Env.getBoolLiteralValue(false));
+ });
+}
+
} // namespace
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