[llvm] r252537 - Fix -Wdeprecated warnings due to the use of copy ops on SCEVPredicate derived class objects

[Vasileios Kalintiris via llvm-commits]

Hi David,

This introduced a "class has virtual functions and accessible non-virtual destructor" warning that is being printed a lot of times (g++ 5.2.1). Can you look at this?

Thanks,
Vasileios

[8/101] /usr/local/bin/g++   -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Ilib/Transforms/Utils -I/home/vk/repos/llvm/lib/Transforms/Utils -Iinclude -I/home/vk/r
epos/llvm/include -fPIC -fvisibility-inlines-hidden -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wno-maybe-uninitialized -Wnon-virtual-dtor -Wno-comment -std
=c++11 -g -fPIC   -gsplit-dwarf  -fno-exceptions -fno-rtti -MMD -MT lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/SimplifyIndVar.cpp.o -MF lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/SimplifyIndVar.cpp.o.d -o 
lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/SimplifyIndVar.cpp.o -c /home/vk/repos/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp
In file included from /home/vk/repos/llvm/include/llvm/Analysis/ScalarEvolutionExpressions.h:19:0,
                 from /home/vk/repos/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp:22:
/home/vk/repos/llvm/include/llvm/Analysis/ScalarEvolution.h:174:9: warning: ‘class llvm::SCEVPredicate’ has virtual functions and accessible non-virtual destructor [-Wnon-virtual-dtor]
   class SCEVPredicate : public FoldingSetNode {
         ^
/home/vk/repos/llvm/include/llvm/Analysis/ScalarEvolution.h:244:9: warning: base class ‘class llvm::SCEVPredicate’ has accessible non-virtual destructor [-Wnon-virtual-dtor]
   class SCEVEqualPredicate final : public SCEVPredicate {
         ^
/home/vk/repos/llvm/include/llvm/Analysis/ScalarEvolution.h:275:9: warning: base class ‘class llvm::SCEVPredicate’ has accessible non-virtual destructor [-Wnon-virtual-dtor]
   class SCEVUnionPredicate final : public SCEVPredicate {
         ^