[Mips] TargetStreamer Support for .set mips16.

This patch updates .set mips16 support which
affects the ELF ABI and its flags. In addition the patch uses
a common interface for both the MipsTargetSteamer and
MipsObjectStreamer that the assembler uses for
both ELF and ASCII output for these directives.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199851 91177308-0d34-0410-b5e6-96231b3b80d8
[Mips] formatting through clang-format

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199853 91177308-0d34-0410-b5e6-96231b3b80d8
X86Disassembler.cpp: Fix @param introduced in r199804. [-Wdocumentation]

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199855 91177308-0d34-0410-b5e6-96231b3b80d8
fix some spell mistakes around 'ConcatVector' and 'ShuffleVector' in AArch64 backend.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199858 91177308-0d34-0410-b5e6-96231b3b80d8
[AArch64]Add CHECK for two test cases testing scalar_to_vector committed in r199461.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199861 91177308-0d34-0410-b5e6-96231b3b80d8
Add a variable to track whether or not we've used a unique section,
e.g. linkonce, to TargetMachine and set it when we've done so
for ELF targets currently. This involved making TargetMachine
non-const in a TLOF use and propagating that change around - I'm
open to other ideas.

This will be used in a future commit to handle emitting debug
information with ranges.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199871 91177308-0d34-0410-b5e6-96231b3b80d8
[mips][sched] Split IIStore into II_S[BHWD], II_S[WD][LR], and II_SAVE

No functional change since the InstrItinData's have been duplicated.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199876 91177308-0d34-0410-b5e6-96231b3b80d8
Refactor lli-child-target to remove duplicated code

Eliminate the copies LLVM's System mmap and cache invalidation code. These were
slowly drifting away from the original version, and moreover the copied code
was a dead end in terms of portability.

We now statically link to Support but in practice with stripping this adds next
to no weight to the resultant binary.

Also avoid installing lli-child-target to the user's $PATH. It's not meant to
be run directly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199881 91177308-0d34-0410-b5e6-96231b3b80d8
Prospective Makefile build fix

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199882 91177308-0d34-0410-b5e6-96231b3b80d8
[LPM] Make LoopSimplify no longer a LoopPass and instead both a utility
function and a FunctionPass.

This has many benefits. The motivating use case was to be able to
compute function analysis passes *after* running LoopSimplify (to avoid
invalidating them) and then to run other passes which require
LoopSimplify. Specifically passes like unrolling and vectorization are
critical to wire up to BranchProbabilityInfo and BlockFrequencyInfo so
that they can be profile aware. For the LoopVectorize pass the only
things in the way are LoopSimplify and LCSSA. This fixes LoopSimplify
and LCSSA is next on my list.

There are also a bunch of other benefits of doing this:
- It is now very feasible to make more passes *preserve* LoopSimplify
  because they can simply run it after changing a loop. Because
  subsequence passes can assume LoopSimplify is preserved we can reduce
  the runs of this pass to the times when we actually mutate a loop
  structure.
- The new pass manager should be able to more easily support loop passes
  factored in this way.
- We can at long, long last observe that LoopSimplify is preserved
  across SCEV. This *halves* the number of times we run LoopSimplify!!!

Now, getting here wasn't trivial. First off, the interfaces used by
LoopSimplify are all over the map regarding how analysis are updated. We
end up with weird "pass" parameters as a consequence. I'll try to clean
at least some of this up later -- I'll have to have it all clean for the
new pass manager.

Next up I discovered a really frustrating bug. LoopUnroll *claims* to
preserve LoopSimplify. That's actually a lie. But the way the
LoopPassManager ends up running the passes, it always ran LoopSimplify
on the unrolled-into loop, rectifying this oversight before any
verification could kick in and point out that in fact nothing was
preserved. So I've added code to the unroller to *actually* simplify the
surrounding loop when it succeeds at unrolling.

The only functional change in the test suite is that we now catch a case
that was previously missed because SCEV and other loop transforms see
their containing loops as simplified and thus don't miss some
opportunities. One test case has been converted to check that we catch
this case rather than checking that we miss it but at least don't get
the wrong answer.

Note that I have #if-ed out all of the verification logic in
LoopSimplify! This is a temporary workaround while extracting these bits
from the LoopPassManager. Currently, there is no way to have a pass in
the LoopPassManager which preserves LoopSimplify along with one which
does not. The LPM will try to verify on each loop in the nest that
LoopSimplify holds but the now-Function-pass cannot distinguish what
loop is being verified and so must try to verify all of them. The inner
most loop is clearly no longer simplified as there is a pass which
didn't even *attempt* to preserve it. =/ Once I get LCSSA out (and maybe
LoopVectorize and some other fixes) I'll be able to re-enable this check
and catch any places where we are still failing to preserve
LoopSimplify. If this causes problems I can back this out and try to
commit *all* of this at once, but so far this seems to work and allow
much more incremental progress.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199884 91177308-0d34-0410-b5e6-96231b3b80d8
Interim build fix for Makefiles

Looks like some parts still need detangling. Let's see if this holds for now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199885 91177308-0d34-0410-b5e6-96231b3b80d8
Prevent repetitive warnings for unrecognized processors and features

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199886 91177308-0d34-0410-b5e6-96231b3b80d8
Windows/ChildTarget.inc: LLIChildTarget::allocate() has gone since r199881.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199889 91177308-0d34-0410-b5e6-96231b3b80d8
Remove empty directories left after r190748 and r198688.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199890 91177308-0d34-0410-b5e6-96231b3b80d8
ARM: use litpools for normal i32 imms when compiling minsize.

With constant-sharing, litpool loads consume 4 + N*2 bytes of code, but
movw/movt pairs consume 8*N. This means litpools are better than movw/movt even
with just one use. Other materialisation strategies can still be better though,
so the logic is a little odd.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199891 91177308-0d34-0410-b5e6-96231b3b80d8
AVX-512: added VPERM2D VPERM2Q VPERM2PS VPERM2PD instructions,
they give better sequences than VPERMI


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199893 91177308-0d34-0410-b5e6-96231b3b80d8
[Object][ELF][Mips] Print symbol name for MIPS ELF relocations.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199898 91177308-0d34-0410-b5e6-96231b3b80d8
R600: Recommit 199842: Add work-around for the CF stack entry HW bug

The unit test is now disabled on non-asserts builds.

The CF stack can be corrupted if you use CF_ALU_PUSH_BEFORE,
CF_ALU_ELSE_AFTER, CF_ALU_BREAK, or CF_ALU_CONTINUE when the number of
sub-entries on the stack is greater than or equal to the stack entry
size and sub-entries modulo 4 is either 0 or 3 (on cedar the bug is
present when number of sub-entries module 8 is either 7 or 0)

We choose to be conservative and always apply the work-around when the
number of sub-enries is greater than or equal to the stack entry size,
so that we can safely over-allocate the stack when we are unsure of the
stack allocation rules.

reviewed-by: Vincent Lejeune <vljn at ovi.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199905 91177308-0d34-0410-b5e6-96231b3b80d8
Remove tail marker when changing an argument to an alloca.

Argument promotion can replace an argument of a call with an alloca. This
requires clearing the tail marker as it is very likely that the callee is now
using an alloca in the caller.

This fixes pr14710.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199909 91177308-0d34-0410-b5e6-96231b3b80d8
Move a unit test into the correct dir. Sorry if it broke Mips-only builds.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199911 91177308-0d34-0410-b5e6-96231b3b80d8