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Internals: Improve cppcheck flow and fix up issues (#6311)

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Added cppcheck-suppressions.txt in the repo root. You can add new
patterns in there instead of having to parse the XML output.

Also configure to add the -D__GNUC__ preprocessor macro, which makes it
understand UASSERT (it understands the 'noreturn' function attribute).

Added some case by case specific suppressions and fixed up other code,
especially in V3Ast*h and V3Dfg*.h, including code generated by astgen
that had some no-ops that irks cppcheck.

One thing it does not seem to like is `const` class members with default
initializers in the class. It will assume that's always the value, even
if overridden in the constructor. We had few so removed them.

With that a lot of files in `src/` are now clean or only have a handful
of issues. Therefore, I have also deleted cppcheck_filtered, and made it
produce human readable output straight to the terminal.

Regarding cleaning up the reported nits, I kind of got bored after
V3[A-E] so pausing here. Apologies for the merge conflicts.

Tested with cppcheck 2.13.0
This commit is contained in:
Geza Lore
2025-08-19 22:02:10 +01:00
committed by GitHub
parent 636a6b8cd2
commit a0edd4e907
44 changed files with 357 additions and 468 deletions
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src/V3CUse.cpp
+4 -3
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@@ -43,7 +43,7 @@ class CUseVisitor final : public VNVisitorConst {
std::map<std::string, std::pair<FileLine*, VUseType>> m_didUse; // What we already used
// METHODS
void addNewUse(AstNode* nodep, VUseType useType, const string& name) {
void addNewUse(const AstNode* nodep, VUseType useType, const string& name) {
auto e = m_didUse.emplace(name, std::make_pair(nodep->fileline(), useType));
if (e.second || ((e.first->second.second & useType) != useType)) {
e.first->second.second = e.first->second.second | useType;
@@ -73,7 +73,8 @@ class CUseVisitor final : public VNVisitorConst {
if (stypep && stypep->classOrPackagep()) {
addNewUse(nodep, VUseType::INT_INCLUDE, stypep->classOrPackagep()->name());
iterateChildrenConst(stypep);
} else if (AstClassRefDType* const classp = VN_CAST(nodep->skipRefp(), ClassRefDType)) {
} else if (const AstClassRefDType* const classp
= VN_CAST(nodep->skipRefp(), ClassRefDType)) {
addNewUse(nodep, VUseType::INT_FWD_CLASS, classp->name());
}
}
@@ -95,7 +96,7 @@ public:
: m_modp{modp} {
iterateConst(modp);
for (auto& used : m_didUse) {
for (const auto& used : m_didUse) {
AstCUse* const newp = new AstCUse{used.second.first, used.second.second, used.first};
m_modp->addStmtsp(newp);
UINFO(8, "Insert " << newp);