From 910a059e428bc1258cc1646ed1beabb8132d5754 Mon Sep 17 00:00:00 2001 From: Piotr Padlewski Date: Fri, 21 Aug 2015 18:28:00 +0000 Subject: Generating assumption loads of vptr after ctor call (fixed) Generating call assume(icmp %vtable, %global_vtable) after constructor call for devirtualization purposes. For more info go to: http://lists.llvm.org/pipermail/cfe-dev/2015-July/044227.html Edit: Fixed version because of PR24479. http://reviews.llvm.org/D11859 llvm-svn: 245721 --- clang/lib/CodeGen/CGCXXABI.h | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) (limited to 'clang/lib/CodeGen/CGCXXABI.h') diff --git a/clang/lib/CodeGen/CGCXXABI.h b/clang/lib/CodeGen/CGCXXABI.h index 5ef409ecdee..158d29ab510 100644 --- a/clang/lib/CodeGen/CGCXXABI.h +++ b/clang/lib/CodeGen/CGCXXABI.h @@ -346,13 +346,25 @@ public: virtual void emitVTableDefinitions(CodeGenVTables &CGVT, const CXXRecordDecl *RD) = 0; + /// Checks if ABI requires extra virtual offset for vtable field. + virtual bool + isVirtualOffsetNeededForVTableField(CodeGenFunction &CGF, + CodeGenFunction::VPtr Vptr) = 0; + + /// Checks if ABI requires to initilize vptrs for given dynamic class. + virtual bool doStructorsInitializeVPtrs(const CXXRecordDecl *VTableClass) = 0; + + /// Get the address point of the vtable for the given base subobject. + virtual llvm::Constant * + getVTableAddressPoint(BaseSubobject Base, + const CXXRecordDecl *VTableClass) = 0; + /// Get the address point of the vtable for the given base subobject while - /// building a constructor or a destructor. On return, NeedsVirtualOffset - /// tells if a virtual base adjustment is needed in order to get the offset - /// of the base subobject. - virtual llvm::Value *getVTableAddressPointInStructor( - CodeGenFunction &CGF, const CXXRecordDecl *RD, BaseSubobject Base, - const CXXRecordDecl *NearestVBase, bool &NeedsVirtualOffset) = 0; + /// building a constructor or a destructor. + virtual llvm::Value * + getVTableAddressPointInStructor(CodeGenFunction &CGF, const CXXRecordDecl *RD, + BaseSubobject Base, + const CXXRecordDecl *NearestVBase) = 0; /// Get the address point of the vtable for the given base subobject while /// building a constexpr. -- cgit v1.2.3