[mips][microMIPS] Implement NOP aliases

This patch implements microMIPS 16-bit (MOVE16 $0, $0) and
32-bit (SLL $0, $0, 0) NOP aliases.

http://reviews.llvm.org/D6440


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222953 91177308-0d34-0410-b5e6-96231b3b80d8
Remove 'else' after 'return'. Fix formatting of a 'switch' statement.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222955 91177308-0d34-0410-b5e6-96231b3b80d8
Replace std::map<K, V*> with std::map<K, V> to handle ownership and deletion of the values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222957 91177308-0d34-0410-b5e6-96231b3b80d8
Remove indirection of vector<T*> in favor of deque<T>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222958 91177308-0d34-0410-b5e6-96231b3b80d8
Remove some unnecessary vector::reserve/assign calls.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222959 91177308-0d34-0410-b5e6-96231b3b80d8
Target triple OS detection tidyup. NFC

Use Triple::isOS*() helpers where possible.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222960 91177308-0d34-0410-b5e6-96231b3b80d8
Switch lowering: Fix broken 'Figure out which block is next' code

This doesn't seem to have worked in a long time, but other optimizations
would clean it up.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222961 91177308-0d34-0410-b5e6-96231b3b80d8
Switch lowering: reformat some for loops etc. NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222962 91177308-0d34-0410-b5e6-96231b3b80d8
Make MultiClass::DefPrototypes own their Records to fix memory leaks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222965 91177308-0d34-0410-b5e6-96231b3b80d8
Use an unsigned type because there seems to be no reason for it to be signed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222966 91177308-0d34-0410-b5e6-96231b3b80d8
Speculatively qualify some llvm::make_unique calls trying to please MSVC

It was failing with this kind of error:

C:\b\build\slave\CrWinClang\build\src\third_party\llvm\lib\TableGen\TGParser.cpp(1243) : error C2668: 'llvm::make_unique' : ambiguous call to overloaded function

        C:\b\build\slave\CrWinClang\build\src\third_party\llvm\include\llvm/ADT/STLExtras.h(408): could be 'std::unique_ptr<llvm::Record,std::default_delete<_Ty>> llvm::make_unique<llvm::Record,std::string,llvm::SMLoc&,llvm::RecordKeeper&,bool>(std::string &&,llvm::SMLoc &,llvm::RecordKeeper &,bool &&)'
        with
        [
            _Ty=llvm::Record
        ]
        C:\b\depot_tools\win_toolchain\vs2013_files\win8sdk\bin\..\..\VC\include\memory(1637): or       'std::unique_ptr<llvm::Record,std::default_delete<_Ty>> std::make_unique<llvm::Record,std::string,llvm::SMLoc&,llvm::RecordKeeper&,bool>(std::string &&,llvm::SMLoc &,llvm::RecordKeeper &,bool &&)' [found using argument-dependent lookup]
        with
        [
            _Ty=llvm::Record
        ]
        while trying to match the argument list '(std::string, llvm::SMLoc, llvm::RecordKeeper, bool)'

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222967 91177308-0d34-0410-b5e6-96231b3b80d8
Qualify one more make_unique call.

The previous patch had effect, but missed this one. It seems MSVC
gets ADL-confused by the calls where the first argument is a function call?

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222968 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r222965 "Make MultiClass::DefPrototypes own their Records to fix memory leaks."

The bots started failing with the error below. I suspect this revision was the cause.

FAILED: /home/bb/bin/g++47   -DGTEST_HAS_RTTI=0 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -fPIC -fvisibility-inlines-hidden -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++11 -ffunction-sections -fdata-sections -O3 -DNDEBUG -Ilib/TableGen -I/home/bb/cmake-llvm-x86_64-linux/llvm-project/llvm/lib/TableGen -Iinclude -I/home/bb/cmake-llvm-x86_64-linux/llvm-project/llvm/include    -fno-exceptions -fno-rtti -MMD -MT lib/TableGen/CMakeFiles/LLVMTableGen.dir/TGParser.cpp.o -MF "lib/TableGen/CMakeFiles/LLVMTableGen.dir/TGParser.cpp.o.d" -o lib/TableGen/CMakeFiles/LLVMTableGen.dir/TGParser.cpp.o -c /home/bb/cmake-llvm-x86_64-linux/llvm-project/llvm/lib/TableGen/TGParser.cpp
In file included from /usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/bits/stl_tempbuf.h:62:0,
                 from /usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/bits/stl_algo.h:64,
                 from /usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/algorithm:63,
                 from /home/bb/cmake-llvm-x86_64-linux/llvm-project/llvm/include/llvm/ADT/StringRef.h:13,
                 from /home/bb/cmake-llvm-x86_64-linux/llvm-project/llvm/lib/TableGen/TGLexer.h:17,
                 from /home/bb/cmake-llvm-x86_64-linux/llvm-project/llvm/lib/TableGen/TGParser.h:17,
                 from /home/bb/cmake-llvm-x86_64-linux/llvm-project/llvm/lib/TableGen/TGParser.cpp:14:
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/bits/stl_construct.h: In instantiation of 'void std::_Construct(_T1*, _Args&& ...) [with _T1 = std::unique_ptr<llvm::Record>; _Args = {const std::unique_ptr<llvm::Record, std::default_delete<llvm::Record> >&}]':
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/bits/stl_uninitialized.h:77:3:   required from 'static _ForwardIterator std::__uninitialized_copy<_TrivialValueTypes>::__uninit_copy(_InputIterator, _InputIterator, _ForwardIterator) [with _InputIterator = __gnu_cxx::__normal_iterator<const std::unique_ptr<llvm::Record>*, std::vector<std::unique_ptr<llvm::Record> > >; _ForwardIterator = std::unique_ptr<llvm::Record>*; bool _TrivialValueTypes = false]'
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/bits/stl_uninitialized.h:119:41:   required from '_ForwardIterator std::uninitialized_copy(_InputIterator, _InputIterator, _ForwardIterator) [with _InputIterator = __gnu_cxx::__normal_iterator<const std::unique_ptr<llvm::Record>*, std::vector<std::unique_ptr<llvm::Record> > >; _ForwardIterator = std::unique_ptr<llvm::Record>*]'
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/bits/stl_uninitialized.h:260:63:   required from '_ForwardIterator std::__uninitialized_copy_a(_InputIterator, _InputIterator, _ForwardIterator, std::allocator<_Tp>&) [with _InputIterator = __gnu_cxx::__normal_iterator<const std::unique_ptr<llvm::Record>*, std::vector<std::unique_ptr<llvm::Record> > >; _ForwardIterator = std::unique_ptr<llvm::Record>*; _Tp = std::unique_ptr<llvm::Record>]'
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/bits/stl_vector.h:310:9:   required from 'std::vector<_Tp, _Alloc>::vector(const std::vector<_Tp, _Alloc>&) [with _Tp = std::unique_ptr<llvm::Record>; _Alloc = std::allocator<std::unique_ptr<llvm::Record> >]'
/home/bb/cmake-llvm-x86_64-linux/llvm-project/llvm/include/llvm/TableGen/Record.h:1664:8:   required from 'constexpr std::pair<_T1, _T2>::pair(_U1&&, _U2&&) [with _U1 = std::basic_string<char>&; _U2 = llvm::MultiClass; <template-parameter-2-3> = void; _T1 = std::basic_string<char>; _T2 = llvm::MultiClass]'
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/bits/stl_pair.h:273:72:   required from 'constexpr std::pair<typename std::__decay_and_strip<_T1>::__type, typename std::__decay_and_strip<_T2>::__type> std::make_pair(_T1&&, _T2&&) [with _T1 = std::basic_string<char>&; _T2 = llvm::MultiClass; typename std::__decay_and_strip<_T2>::__type = llvm::MultiClass; typename std::__decay_and_strip<_T1>::__type = std::basic_string<char>]'
/home/bb/cmake-llvm-x86_64-linux/llvm-project/llvm/lib/TableGen/TGParser.cpp:2295:78:   required from here
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/bits/stl_construct.h:77:7: error: use of deleted function 'std::unique_ptr<_Tp, _Dp>::unique_ptr(const std::unique_ptr<_Tp, _Dp>&) [with _Tp = llvm::Record; _Dp = std::default_delete<llvm::Record>]'
In file included from /usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/memory:86:0,
                 from /home/bb/cmake-llvm-x86_64-linux/llvm-project/llvm/include/llvm/ADT/STLExtras.h:25,
                 from /home/bb/cmake-llvm-x86_64-linux/llvm-project/llvm/include/llvm/ADT/ArrayRef.h:14,
                 from /home/bb/cmake-llvm-x86_64-linux/llvm-project/llvm/include/llvm/Support/SourceMgr.h:19,
                 from /home/bb/cmake-llvm-x86_64-linux/llvm-project/llvm/lib/TableGen/TGParser.h:19,
                 from /home/bb/cmake-llvm-x86_64-linux/llvm-project/llvm/lib/TableGen/TGParser.cpp:14:
/usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/bits/unique_ptr.h:262:7: error: declared here
ninja: build stopped: subcommand failed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222970 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r222957 "Replace std::map<K, V*> with std::map<K, V> to handle ownership and deletion of the values."

Upon further review I think the MultiClass is being copied into the map instead of being moved due to the copy constructor on the nested Record type. This ultimately got exposed when the vector in DefPrototype vector was changed to hold unique_ptrs in another commit. This caused gcc 4.7 to fail due to the use of the copy constructor on unique_ptr with the error pointing back to one of the insert calls from this commit. Not sure why clang was able to build.

This reverts commit 710cdf729f84b428bf41aa8d32dbdb35fff79fde.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222971 91177308-0d34-0410-b5e6-96231b3b80d8