Replaces a few pointers with references in llvm-nm.cpp.

This opens the way for a few std::uinque_ptr cleanups.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214439 91177308-0d34-0410-b5e6-96231b3b80d8
Improve the remark generated when a variable that is used outside the loop is not a reduction or induction variable.

Reviewed by Arnold Schwaighofer


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214440 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "Remove MCObjectDisassembler.cpp as it is untested and unused." as it is apparently used, but the build didn't return errors weirdly.

This reverts commits 214437 and 214438.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214444 91177308-0d34-0410-b5e6-96231b3b80d8
Improve the remark generated for -Rpass-missed.

The current remark is ambiguous and makes it sounds like explicitly specifying vectorization will allow the loop to be vectorized. This is not the case. The improved remark directs the user to -Rpass-analysis=loop-vectorize to determine the cause of the pass-miss.

Reviewed by Arnold Schwaighofer`


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214445 91177308-0d34-0410-b5e6-96231b3b80d8
Make sure no loads resulting from load->switch DAGCombine are marked invariant

Currently when DAGCombine converts loads feeding a switch into a switch of
addresses feeding a load the new load inherits the isInvariant flag of the left
side. This is incorrect since invariant loads can be reordered in cases where it
is illegal to reoarder normal loads.

This patch adds an isInvariant parameter to getExtLoad() and updates all call
sites to pass in the data if they have it or false if they don't. It also
changes the DAGCombine to use that data to make the right decision when
creating the new load.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214449 91177308-0d34-0410-b5e6-96231b3b80d8