[objcarcopts] Refactor out the RRInfo merging code from PtrState into RRInfo::Merge.

I also added some comments and performed minor code cleanups.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184528 91177308-0d34-0410-b5e6-96231b3b80d8
[objcarcopts] Some more minor code cleanups/comment additions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184531 91177308-0d34-0410-b5e6-96231b3b80d8
[obcjarcopts] Encapsulate PtrState.RRI.KnownSafe in the methods PtrState.IsKnownSafe and PtrState.SetKnownSafe.

This is apart of a series of patches to encapsulate PtrState.RRI and
make PtrState.RRI a private field of PtrState.

*NOTE* This is actually the second commit in the patch stream. I should
have put this note on the first such commit r184528.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184532 91177308-0d34-0410-b5e6-96231b3b80d8
[objcarcopts] Encapsulate PtrState.RRI.IsTailCallRelease into the method PtrState.IsTailCallRelease() and PtrState.SetTailCallRelease().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184533 91177308-0d34-0410-b5e6-96231b3b80d8
[objcarcopts] Encapsulate PtrState.RRI.ReleaseMetadata into the methods PtrState.GetReleaseMetadata() and PtrState.SetReleaseMetadata().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184534 91177308-0d34-0410-b5e6-96231b3b80d8
Fix an ordering problem in the test.

The output can be in different orders, which breaks the test in some
situations. I have not yet found out what the root cause of the order
difference is. This fixes our internal build. If it is not the right
solution, feel free to roll back.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184535 91177308-0d34-0410-b5e6-96231b3b80d8
add Function::removeFnAttr()

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184536 91177308-0d34-0410-b5e6-96231b3b80d8

[PowerPC] Rename some more VK_PPC_ enums

This renames more VK_PPC_ enums, to make them more closely reflect
the @modifier string they represent.  This also prepares for adding
a bunch of new VK_PPC_ enums in upcoming patches.

For consistency, some MO_ flags related to VK_PPC_ enums are
likewise renamed.

No change in behaviour.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184547 91177308-0d34-0410-b5e6-96231b3b80d8

[PowerPC] Support @h modifier

This adds necessary infrastructure to support the @h modifier.
Note that all required relocation types were already present
(and unused).

This patch provides support for using @h in the assembler;
it would also be possible to now use this feature in code
generated by the compiler, but this is not done yet.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184548 91177308-0d34-0410-b5e6-96231b3b80d8

[PowerPC] Support @toc@h modifier

This adds the relocation type and other necessary infrastructure
to use the @toc@h modifier in the assembler.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184549 91177308-0d34-0410-b5e6-96231b3b80d8

[PowerPC] Support @higher et.al. modifiers

This adds support for the @higher, @highera, @highest, and @highesta
modifers, including some missing relocation types.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184550 91177308-0d34-0410-b5e6-96231b3b80d8

[PowerPC] Support various tls-related modifiers

The current code base only supports the minimum set of tls-related
relocations and @modifiers that are necessary to support compiler-
generated code.  This patch extends this to the full set defined
in the ABI (and supported by the GNU assembler) for the benefit
of the assembler parser.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184551 91177308-0d34-0410-b5e6-96231b3b80d8

[PowerPC] Support R_PPC_REL16 family of relocations

The GNU assembler supports (as extension to the ABI) use of PC-relative
relocations in half16 fields, which allows writing code like:

  li 1, base-.

This patch adds support for those relocation types in the assembler.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184552 91177308-0d34-0410-b5e6-96231b3b80d8
MI-Sched: Adjust regpressure limits for reserved regs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184564 91177308-0d34-0410-b5e6-96231b3b80d8
MI-Sched: cleanup DEBUG output.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184565 91177308-0d34-0410-b5e6-96231b3b80d8
Fix IMULX machine model. Multiple def operands require multiple SchedWrites.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184566 91177308-0d34-0410-b5e6-96231b3b80d8
Make rematerialization in the coalescer less sensitive to LRG order.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184567 91177308-0d34-0410-b5e6-96231b3b80d8
Modify the -join-globalcopies option (off by default).

Always coalesce in forward order to propagate rematerialization.
I'm fixing this option so I can enable it by default soon.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184568 91177308-0d34-0410-b5e6-96231b3b80d8
Fix a -join-globalcopies bug; handle undef operands.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184569 91177308-0d34-0410-b5e6-96231b3b80d8
whitespace

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184570 91177308-0d34-0410-b5e6-96231b3b80d8