diff options
Diffstat (limited to 'clang/lib/CIR/CodeGen/CIRGenExprCXX.cpp')
| -rw-r--r-- | clang/lib/CIR/CodeGen/CIRGenExprCXX.cpp | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/clang/lib/CIR/CodeGen/CIRGenExprCXX.cpp b/clang/lib/CIR/CodeGen/CIRGenExprCXX.cpp index fe9e210..a3cdf19 100644 --- a/clang/lib/CIR/CodeGen/CIRGenExprCXX.cpp +++ b/clang/lib/CIR/CodeGen/CIRGenExprCXX.cpp @@ -801,6 +801,26 @@ void CIRGenFunction::emitDeleteCall(const FunctionDecl *deleteFD, emitNewDeleteCall(*this, deleteFD, deleteFTy, deleteArgs); } +static mlir::Value emitDynamicCastToNull(CIRGenFunction &cgf, + mlir::Location loc, QualType destTy) { + mlir::Type destCIRTy = cgf.convertType(destTy); + assert(mlir::isa<cir::PointerType>(destCIRTy) && + "result of dynamic_cast should be a ptr"); + + if (!destTy->isPointerType()) { + mlir::Region *currentRegion = cgf.getBuilder().getBlock()->getParent(); + /// C++ [expr.dynamic.cast]p9: + /// A failed cast to reference type throws std::bad_cast + cgf.cgm.getCXXABI().emitBadCastCall(cgf, loc); + + // The call to bad_cast will terminate the current block. Create a new block + // to hold any follow up code. + cgf.getBuilder().createBlock(currentRegion, currentRegion->end()); + } + + return cgf.getBuilder().getNullPtr(destCIRTy, loc); +} + mlir::Value CIRGenFunction::emitDynamicCast(Address thisAddr, const CXXDynamicCastExpr *dce) { mlir::Location loc = getLoc(dce->getSourceRange()); @@ -831,10 +851,8 @@ mlir::Value CIRGenFunction::emitDynamicCast(Address thisAddr, assert(srcRecordTy->isRecordType() && "source type must be a record type!"); assert(!cir::MissingFeatures::emitTypeCheck()); - if (dce->isAlwaysNull()) { - cgm.errorNYI(dce->getSourceRange(), "emitDynamicCastToNull"); - return {}; - } + if (dce->isAlwaysNull()) + return emitDynamicCastToNull(*this, loc, destTy); auto destCirTy = mlir::cast<cir::PointerType>(convertType(destTy)); return cgm.getCXXABI().emitDynamicCast(*this, loc, srcRecordTy, destRecordTy, |