Author: prazek Date: Sat May 20 03:56:18 2017 New Revision: 303488 URL: http://llvm.org/viewvc/llvm-project?rev=303488&view=rev Log: [Devirtualization] insert placement new barrier with -O0
Summary: To not break LTO with different optimizations levels, we should insert the barrier regardles of optimization level. Reviewers: rjmccall, rsmith, mehdi_amini Reviewed By: mehdi_amini Subscribers: mehdi_amini, cfe-commits Differential Revision: https://reviews.llvm.org/D32401 Modified: cfe/trunk/lib/CodeGen/CGExprCXX.cpp Modified: cfe/trunk/lib/CodeGen/CGExprCXX.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExprCXX.cpp?rev=303488&r1=303487&r2=303488&view=diff ============================================================================== --- cfe/trunk/lib/CodeGen/CGExprCXX.cpp (original) +++ cfe/trunk/lib/CodeGen/CGExprCXX.cpp Sat May 20 03:56:18 2017 @@ -1658,8 +1658,9 @@ llvm::Value *CodeGenFunction::EmitCXXNew // Passing pointer through invariant.group.barrier to avoid propagation of // vptrs information which may be included in previous type. + // To not break LTO with different optimizations levels, we do it regardless + // of optimization level. if (CGM.getCodeGenOpts().StrictVTablePointers && - CGM.getCodeGenOpts().OptimizationLevel > 0 && allocator->isReservedGlobalPlacementOperator()) result = Address(Builder.CreateInvariantGroupBarrier(result.getPointer()), result.getAlignment()); _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
