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teach loplugin constantparam about default param values

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Change-Id: I334622bd34d8349f5b3988122d282b1062b225bb
This commit is contained in:
Noel Grandin
2016-09-06 12:01:29 +02:00
committed by Noel Grandin
parent d69066115c
commit d2143eacaf
2 changed files with 52 additions and 32 deletions
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72
compilerplugins/clang/constantparam.cxx
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@@ -96,11 +96,11 @@ public:
bool VisitDeclRefExpr( const DeclRefExpr* );
bool VisitCXXConstructExpr( const CXXConstructExpr* );
private:
MyCallSiteInfo niceName(const FunctionDecl* functionDecl, int paramIndex, const ParmVarDecl* parmVarDecl, const std::string& callValue);
MyCallSiteInfo niceName(const FunctionDecl* functionDecl, int paramIndex, llvm::StringRef paramName, const std::string& callValue);
std::string getCallValue(const Expr* arg);
};
MyCallSiteInfo ConstantParam::niceName(const FunctionDecl* functionDecl, int paramIndex, const ParmVarDecl* parmVarDecl, const std::string& callValue)
MyCallSiteInfo ConstantParam::niceName(const FunctionDecl* functionDecl, int paramIndex, llvm::StringRef paramName, const std::string& callValue)
{
if (functionDecl->getInstantiatedFromMemberFunction())
functionDecl = functionDecl->getInstantiatedFromMemberFunction();
@@ -133,7 +133,7 @@ MyCallSiteInfo ConstantParam::niceName(const FunctionDecl* functionDecl, int par
if (isa<CXXMethodDecl>(functionDecl) && dyn_cast<CXXMethodDecl>(functionDecl)->isConst()) {
aInfo.nameAndParams += " const";
}
aInfo.paramName = parmVarDecl->getName();
aInfo.paramName = paramName;
aInfo.paramIndex = paramIndex;
aInfo.callValue = callValue;
@@ -146,17 +146,24 @@ MyCallSiteInfo ConstantParam::niceName(const FunctionDecl* functionDecl, int par
std::string ConstantParam::getCallValue(const Expr* arg)
{
arg = arg->IgnoreParenCasts();
if (isa<CXXDefaultArgExpr>(arg)) {
arg = dyn_cast<CXXDefaultArgExpr>(arg)->getExpr();
}
arg = arg->IgnoreParenCasts();
// ignore this, it seems to trigger an infinite recursion
if (isa<UnaryExprOrTypeTraitExpr>(arg)) {
return "unknown";
return "unknown1";
}
APSInt x1;
if (arg->EvaluateAsInt(x1, compiler.getASTContext()))
{
return x1.toString(10);
}
return "unknown";
if (isa<CXXNullPtrLiteralExpr>(arg)) {
return "0";
}
return "unknown2";
}
bool ConstantParam::VisitCallExpr(const CallExpr * callExpr) {
@@ -193,22 +200,30 @@ bool ConstantParam::VisitCallExpr(const CallExpr * callExpr) {
functionDecl = functionDecl->getTemplateInstantiationPattern();
#endif
if (!functionDecl->getNameInfo().getLoc().isValid() || ignoreLocation(functionDecl)) {
return true;
}
// ignore stuff that forms part of the stable URE interface
if (isInUnoIncludeFile(compiler.getSourceManager().getSpellingLoc(
functionDecl->getNameInfo().getLoc()))) {
return true;
}
if (functionDecl->getNameInfo().getLoc().isValid() && ignoreLocation(functionDecl)) {
return true;
}
for (unsigned i = 0; i < callExpr->getNumArgs(); ++i) {
if (i >= functionDecl->getNumParams()) // can happen in template code
break;
const Expr* arg = callExpr->getArg(i);
std::string callValue = getCallValue(arg);
const ParmVarDecl* parmVarDecl = functionDecl->getParamDecl(i);
MyCallSiteInfo funcInfo = niceName(functionDecl, i, parmVarDecl, callValue);
unsigned len = std::max(callExpr->getNumArgs(), functionDecl->getNumParams());
for (unsigned i = 0; i < len; ++i) {
const Expr* valExpr;
if (i < callExpr->getNumArgs())
valExpr = callExpr->getArg(i);
else if (i < functionDecl->getNumParams() && functionDecl->getParamDecl(i)->hasDefaultArg())
valExpr = functionDecl->getParamDecl(i)->getDefaultArg();
else
// can happen in template code
continue;
std::string callValue = getCallValue(valExpr);
std::string paramName = i < functionDecl->getNumParams()
? functionDecl->getParamDecl(i)->getName()
: llvm::StringRef("###" + std::to_string(i));
MyCallSiteInfo funcInfo = niceName(functionDecl, i, paramName, callValue);
callSet.insert(funcInfo);
}
return true;
@@ -224,7 +239,7 @@ bool ConstantParam::VisitDeclRefExpr( const DeclRefExpr* declRefExpr )
const FunctionDecl* functionDecl = dyn_cast<FunctionDecl>(decl);
for (unsigned i = 0; i < functionDecl->getNumParams(); ++i)
{
MyCallSiteInfo funcInfo = niceName(functionDecl, i, functionDecl->getParamDecl(i), "unknown");
MyCallSiteInfo funcInfo = niceName(functionDecl, i, functionDecl->getParamDecl(i)->getName(), "unknown3");
callSet.insert(funcInfo);
}
return true;
@@ -240,18 +255,25 @@ bool ConstantParam::VisitCXXConstructExpr( const CXXConstructExpr* constructExpr
constructorDecl->getNameInfo().getLoc()))) {
return true;
}
if (constructorDecl->getNameInfo().getLoc().isValid() && ignoreLocation(constructorDecl)) {
if (!constructorDecl->getNameInfo().getLoc().isValid() || ignoreLocation(constructorDecl)) {
return true;
}
for (unsigned i = 0; i < constructExpr->getNumArgs(); ++i)
{
if (i >= constructorDecl->getNumParams()) // can happen in template code
break;
const Expr* arg = constructExpr->getArg(i);
std::string callValue = getCallValue(arg);
const ParmVarDecl* parmVarDecl = constructorDecl->getParamDecl(i);
MyCallSiteInfo funcInfo = niceName(constructorDecl, i, parmVarDecl, callValue);
unsigned len = std::max(constructExpr->getNumArgs(), constructorDecl->getNumParams());
for (unsigned i = 0; i < len; ++i) {
const Expr* valExpr;
if (i < constructExpr->getNumArgs())
valExpr = constructExpr->getArg(i);
else if (i < constructorDecl->getNumParams() && constructorDecl->getParamDecl(i)->hasDefaultArg())
valExpr = constructorDecl->getParamDecl(i)->getDefaultArg();
else
// can happen in template code
continue;
std::string callValue = getCallValue(valExpr);
std::string paramName = i < constructorDecl->getNumParams()
? constructorDecl->getParamDecl(i)->getName()
: llvm::StringRef("###" + std::to_string(i));
MyCallSiteInfo funcInfo = niceName(constructorDecl, i, paramName, callValue);
callSet.insert(funcInfo);
}
return true;