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C++: Show indirections when printing SSA variables #15185

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Merged
MathiasVP merged 1 commit into from
Dec 21, 2023
Merged

C++: Show indirections when printing SSA variables #15185

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17 changes: 10 additions & 7 deletions cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/SsaInternals.qll
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,15 @@ private module SourceVariables {
ind = [0 .. countIndirectionsForCppType(base.getLanguageType()) + 1]
}

private int maxNumberOfIndirections() { result = max(SourceVariable sv | | sv.getIndirection()) }

private string repeatStars(int n) {
n = 0 and result = ""
or
n = [1 .. maxNumberOfIndirections()] and
result = "*" + repeatStars(n - 1)
}

class SourceVariable extends TSourceVariable {
SsaInternals0::SourceVariable base;
int ind;
Expand All @@ -32,13 +41,7 @@ private module SourceVariables {
SsaInternals0::SourceVariable getBaseVariable() { result = base }

/** Gets a textual representation of this element. */
string toString() {
ind = 0 and
result = this.getBaseVariable().toString()
or
ind > 0 and
result = this.getBaseVariable().toString() + " indirection"
}
string toString() { result = repeatStars(this.getIndirection()) }

/**
* Gets the number of loads performed on the base source variable
Expand Down