================
@@ -33,6 +34,65 @@ struct clang::CIRGen::CGCoroData {
CIRGenFunction::CGCoroInfo::CGCoroInfo() {}
CIRGenFunction::CGCoroInfo::~CGCoroInfo() {}
+namespace {
+// FIXME: both GetParamRef and ParamReferenceReplacerRAII are good template
+// candidates to be shared among LLVM / CIR codegen.
+
+// Hunts for the parameter reference in the parameter copy/move declaration.
+struct GetParamRef : public StmtVisitor<GetParamRef> {
+public:
+ DeclRefExpr *expr = nullptr;
+ GetParamRef() {}
+ void VisitDeclRefExpr(DeclRefExpr *e) {
+ assert(expr == nullptr && "multilple declref in param move");
+ expr = e;
+ }
+ void VisitStmt(Stmt *s) {
+ for (auto *c : s->children()) {
+ if (c)
+ Visit(c);
+ }
+ }
+};
+
+// This class replaces references to parameters to their copies by changing
+// the addresses in CGF.LocalDeclMap and restoring back the original values in
+// its destructor.
+struct ParamReferenceReplacerRAII {
+ CIRGenFunction::DeclMapTy savedLocals;
+ CIRGenFunction::DeclMapTy &localDeclMap;
+
+ ParamReferenceReplacerRAII(CIRGenFunction::DeclMapTy &localDeclMap)
+ : localDeclMap(localDeclMap) {}
+
+ void addCopy(DeclStmt const *pm) {
+ // Figure out what param it refers to.
+
+ assert(pm->isSingleDecl());
+ VarDecl const *vd = static_cast<VarDecl const *>(pm->getSingleDecl());
+ Expr const *initExpr = vd->getInit();
+ GetParamRef visitor;
+ visitor.Visit(const_cast<Expr *>(initExpr));
+ assert(visitor.expr);
+ DeclRefExpr *dreOrig = visitor.expr;
+ auto *pd = dreOrig->getDecl();
----------------
andykaylor wrote:
No `auto` here.
https://github.com/llvm/llvm-project/pull/166683
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