Rust: Add local data flow edge for SSA nodes#18026
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paldepind merged 4 commits intogithub:mainfrom Nov 19, 2024
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| fn sink(s: i64) { |
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| LocalFlow::localFlowStepCommon(nodeFrom, nodeTo) | ||
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| SsaFlow::localFlowStep(_, nodeFrom, nodeTo, _) |
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This should be part of localFlowStepCommon.
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I've moved it. I copied the pattern from Ruby where it's also structured st. the SSA flow is not in localFlowStepCommon.
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| // An edge from a pattern to its corresponding SSA definition. | ||
| nodeFrom.(Node::PatNode).getPat() = | ||
| nodeTo.(Node::SsaNode).getDefinitionExt().getSourceVariable().getPat() |
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Should rather be:
// An edge from a pattern/expression to its corresponding SSA definition.
nodeFrom.(Node::AstCfgFlowNode).getCfgNode() =
nodeTo.(Node::SsaNode).getDefinitionExt().(Ssa::WriteDefinition).getControlFlowNode()
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Thanks 🙇. That makes sense.
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| /** A data flow node that corresponds to a CFG node for an AST node. */ | ||
| abstract private class AstCfgFlowNode extends Node { | ||
| abstract class AstCfgFlowNode extends Node { |
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Adds some additional local data flow tests and fixes a few missing results by adding an edge from patterns to their corresponding SSA node.
I'm not 100% that this is the correct thing to do in all cases (complex patterns) but it did fix the tests, and we can iterate on this.