================
@@ -105,6 +107,87 @@ bool implicitObjectParamIsLifetimeBound(const FunctionDecl
*FD) {
return isNormalAssignmentOperator(FD);
}
+std::optional<LifetimeBoundParamInfo>
+getLifetimeBoundParamInfo(const FunctionDecl *FD, unsigned I) {
+ FD = getDeclWithMergedLifetimeBoundAttrs(FD);
+ if (!FD)
+ return std::nullopt;
+
+ const ParmVarDecl *PVD = nullptr;
+ if (const auto *Method = dyn_cast<CXXMethodDecl>(FD);
+ Method && Method->isInstance() && !isa<CXXConstructorDecl>(FD)) {
+ if (I == 0)
+ return implicitObjectParamIsLifetimeBound(Method)
+ ? std::optional<LifetimeBoundParamInfo>(
+ LifetimeBoundParamInfo(Method))
+ : std::nullopt;
+ if ((I - 1) < Method->getNumParams())
+ PVD = Method->getParamDecl(I - 1);
+ } else if (I < FD->getNumParams()) {
+ PVD = FD->getParamDecl(I);
+ }
+
+ if (PVD && PVD->hasAttr<clang::LifetimeBoundAttr>())
+ return LifetimeBoundParamInfo(PVD);
+ return std::nullopt;
+}
+
+static bool isExprInCallArg(const Expr *Arg, const Expr *Source) {
+ if (!Arg || !Source)
+ return false;
+
+ Arg = Arg->IgnoreParenImpCasts();
+ Source = Source->IgnoreParenImpCasts();
+ if (Arg == Source || Arg->getSourceRange() == Source->getSourceRange())
+ return true;
+
+ for (const Stmt *Child : Arg->children())
+ if (const auto *ChildExpr = dyn_cast_or_null<Expr>(Child))
+ if (isExprInCallArg(ChildExpr, Source))
+ return true;
+
+ return false;
+}
+
+std::optional<LifetimeBoundParamInfo>
+getLifetimeBoundParamInfoForCallArg(const Expr *Call, const Expr *Source) {
----------------
iitianpushkar wrote:
Agreed. I will also follow this approach and update the patch accordingly.
https://github.com/llvm/llvm-project/pull/206337
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