From fa9f8b4cf962d865c4b430a25aca2fb5faa84337 Mon Sep 17 00:00:00 2001 From: Fariborz Jahanian Date: Tue, 28 Jul 2009 22:00:58 +0000 Subject: [PATCH] ir-gen derived-to-base conversion in implicit casts. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@77374 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/CGExprScalar.cpp | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/lib/CodeGen/CGExprScalar.cpp b/lib/CodeGen/CGExprScalar.cpp index cbca7aa6d2..5ded216f03 100644 --- a/lib/CodeGen/CGExprScalar.cpp +++ b/lib/CodeGen/CGExprScalar.cpp @@ -440,8 +440,22 @@ Value *ScalarExprEmitter::EmitScalarConversion(Value *Src, QualType SrcType, // pointer type. if (isa(DstTy)) { // The source value may be an integer, or a pointer. - if (isa(Src->getType())) + if (isa(Src->getType())) { + // Some heavy lifting for derived to base conversion. + if (const PointerType *PT = SrcType->getAsPointerType()) { + QualType SrcClassTy = PT->getPointeeType(); + if (const RecordType *RT = SrcClassTy->getAsRecordType()) + if (CXXRecordDecl *ClassDecl = + dyn_cast(RT->getDecl())) { + QualType DstClassType = DstType->getPointeeType(); + if (const RecordType *DRT = DstClassType->getAsRecordType()) + if (CXXRecordDecl *BaseClassDecl = + dyn_cast(DRT->getDecl())) + Src = CGF.AddressCXXOfBaseClass(Src, ClassDecl, BaseClassDecl); + } + } return Builder.CreateBitCast(Src, DstTy, "conv"); + } assert(SrcType->isIntegerType() && "Not ptr->ptr or int->ptr conversion?"); // First, convert to the correct width so that we control the kind of // extension. -- 2.40.0