forked from OSchip/llvm-project
300fbf56f8
This patch adds initial support for context-sensitive analysis of simple functions whose definition is available in the translation unit, guarded by the `ContextSensitive` flag in the new `TransferOptions` struct. When this option is true, the `VisitCallExpr` case in the builtin transfer function has a fallthrough case which checks for a direct callee with a body. In that case, it constructs a CFG from that callee body, uses the new `pushCall` method on the `Environment` to make an environment to analyze the callee, and then calls `runDataflowAnalysis` with a `NoopAnalysis` (disabling context-sensitive analysis on that sub-analysis, to avoid problems with recursion). After the sub-analysis completes, the `Environment` from its exit block is simply assigned back to the environment at the callsite. The `pushCall` method (which currently only supports non-method functions with some restrictions) maps the `SourceLocation`s for all the parameters to the existing source locations for the corresponding arguments from the callsite. This patch adds a few tests to check that this context-sensitive analysis works on simple functions. More sophisticated functionality will be added later; the most important next step is to explicitly model context in some fields of the `DataflowAnalysisContext` class, as mentioned in a `FIXME` comment in the `pushCall` implementation. Reviewed By: ymandel, xazax.hun Differential Revision: https://reviews.llvm.org/D130306 |
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| .. | ||
| FlowSensitive | ||
| CFGBuildResult.h | ||
| CFGDominatorTree.cpp | ||
| CFGTest.cpp | ||
| CMakeLists.txt | ||
| CloneDetectionTest.cpp | ||
| ExprMutationAnalyzerTest.cpp | ||
| MacroExpansionContextTest.cpp | ||