Restore the behavior of frame lowering before my refactoring.
It turns out that ppc backend has really weird interdependencies
over different hooks and all stuff is fragile wrt small changes.
This should fix PR8749

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122155 91177308-0d34-0410-b5e6-96231b3b80d8

Just rename the functions, relying on matching a instruction that has the same name as a symbol is way too fragile.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122154 91177308-0d34-0410-b5e6-96231b3b80d8

Test more than just label names and make test work on non-x86 hosts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122153 91177308-0d34-0410-b5e6-96231b3b80d8

Header warning patrol.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122152 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for lexing single quotes like 'c'.

This fixed 8615.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122150 91177308-0d34-0410-b5e6-96231b3b80d8

Revert r122143 through r122140, which collectively broke the LLVMC tests on
the buildbots.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122149 91177308-0d34-0410-b5e6-96231b3b80d8

Merge isAbsolute into IsSymbolRefDifferenceFullyResolved.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122148 91177308-0d34-0410-b5e6-96231b3b80d8

Remove the MCObjectFormat class.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122147 91177308-0d34-0410-b5e6-96231b3b80d8

Add a test that shows that we produce no fixups when computing the difference
of two symbols in the same fragment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122145 91177308-0d34-0410-b5e6-96231b3b80d8

Add a FIXME and explain a hack.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122144 91177308-0d34-0410-b5e6-96231b3b80d8

Support/PathV1: Clarify deprecation warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122143 91177308-0d34-0410-b5e6-96231b3b80d8

Fix whitespace.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122142 91177308-0d34-0410-b5e6-96231b3b80d8

Support/PathV1: Deprecate get{Basename,Dirname,Suffix}.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122141 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the note.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122139 91177308-0d34-0410-b5e6-96231b3b80d8

Revert 122011, 122012, 122013, 122023 adding back an important optimization.
I added a note, but suggestions on how to add a test are really welcome.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122138 91177308-0d34-0410-b5e6-96231b3b80d8

Apparently, operandices is not a word.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122135 91177308-0d34-0410-b5e6-96231b3b80d8

Move some data to the TargetWriter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122134 91177308-0d34-0410-b5e6-96231b3b80d8

Teach the inline spiller to attempt folding a load instruction into its single
use before rematerializing the load.

This allows us to produce:

    addps LCPI0_1(%rip), %xmm2

Instead of:

    movaps LCPI0_1(%rip), %xmm3
    addps %xmm3, %xmm2

Saving a register and an instruction. The standard spiller already knows how to
do this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122133 91177308-0d34-0410-b5e6-96231b3b80d8

Tweak debug spew.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122132 91177308-0d34-0410-b5e6-96231b3b80d8

r120333 changed the opcode for the Thumb1 stuff from ARM::tMOVr to
ARM::tMOVgpr2gpr. But this check didn't change. As a result, we were getting
misaligned references to the jump table from an ADR instruction.

There is a test case, but unfortunately it's sensitive to random code changes.

<rdar://problem/8782223>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122131 91177308-0d34-0410-b5e6-96231b3b80d8

RemoveUnusedCPEntries can change things. Track it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122129 91177308-0d34-0410-b5e6-96231b3b80d8

Test for push being relaxed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122124 91177308-0d34-0410-b5e6-96231b3b80d8

Check that the register is live-in to the loop header before inserting copies in
the loop predecessors.

The register can be live-out from a predecessor without being live-in to the
loop header if there is a critical edge from the predecessor.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122123 91177308-0d34-0410-b5e6-96231b3b80d8

Fix GCC warning:
  lib/CodeGen/RegAllocGreedy.cpp:311: error: unused variable 'PhysReg' [-Wunused-variable]

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122122 91177308-0d34-0410-b5e6-96231b3b80d8

Relax push instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122121 91177308-0d34-0410-b5e6-96231b3b80d8

Make LazyValueInfo non-recursive.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122120 91177308-0d34-0410-b5e6-96231b3b80d8

Rearrange some Neon multiclasses.  No functional changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122119 91177308-0d34-0410-b5e6-96231b3b80d8

Support/PathV1: Deprecate getLast.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122116 91177308-0d34-0410-b5e6-96231b3b80d8

CMake: Cleanup and document MSVC warning flags.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122115 91177308-0d34-0410-b5e6-96231b3b80d8

Add support to CallbackVH to receive notification when a Value's use-list changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122114 91177308-0d34-0410-b5e6-96231b3b80d8

Pass a Banner argument to the machine code verifier both from
createMachineVerifierPass and MachineFunction::verify.

The banner is printed before the machine code dump, just like the printer pass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122113 91177308-0d34-0410-b5e6-96231b3b80d8

Fix result type of Neon floating-point comparisons against zero.
The result vector elements are always integers.  Radar 8782191.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122112 91177308-0d34-0410-b5e6-96231b3b80d8

Add some missing entries in ARMTargetLowering::getTargetNodeName.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122111 91177308-0d34-0410-b5e6-96231b3b80d8

Whitespace fixes. No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122110 91177308-0d34-0410-b5e6-96231b3b80d8

Avoid dereferencing end() in collectInterferingVRegs() when there is no
interference.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122108 91177308-0d34-0410-b5e6-96231b3b80d8

Make the -verify-regalloc command line option available to base classes as
RegAllocBase::VerifyEnabled.

Run the machine code verifier in a few interesting places during RegAllocGreedy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122107 91177308-0d34-0410-b5e6-96231b3b80d8

Enable loop splitting in RegAllocGreedy.

The heuristics split around the largest loop where the current register may be
allocated without interference.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122106 91177308-0d34-0410-b5e6-96231b3b80d8

Add vector versions of some existing scalar transforms to aid codegen in matching psign & pblend operations to the IR produced by clang/gcc for their C idioms.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122105 91177308-0d34-0410-b5e6-96231b3b80d8

During local stack slot allocation, the materializeFrameBaseRegister function
may be called. If the entry block is empty, the insertion point iterator will be
the "end()" value. Calling ->getParent() on it (among others) causes problems.

Modify materializeFrameBaseRegister to take the machine basic block and insert
the frame base register at the beginning of that block. (It's very similar to
what the code does all ready. The only difference is that it will always insert
at the beginning of the entry block instead of after a previous materialization
of the frame base register. I doubt that that matters here.)

<rdar://problem/8782198>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122104 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a DAGCombiner crash when folding binary vector operations with constant
BUILD_VECTOR operands where the element type is not legal.  I had previously
changed this code to insert TRUNCATE operations, but that was just wrong.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122102 91177308-0d34-0410-b5e6-96231b3b80d8

Combine several vector-related DAGCombiner tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122101 91177308-0d34-0410-b5e6-96231b3b80d8

Avoid report_fatal_error in ARM's PrintAsmOperand method.
The standard error handling in AsmPrinter::EmitInlineAsm handles this much
better, so just use it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122100 91177308-0d34-0410-b5e6-96231b3b80d8

Remove trailing whitespace.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122099 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for matching psign & plendvb to the x86 target
Remove unnecessary pandn patterns, 'vnot' patfrag looks through bitcasts

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122098 91177308-0d34-0410-b5e6-96231b3b80d8

Add more checks to IntervalMapOverlaps::advance() to ensure that advanceTo sees
monotonic keys.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122093 91177308-0d34-0410-b5e6-96231b3b80d8

It is allowed to call IntervalMap::const_iterator::advanceTo() with a key that
moves the iterator to end(), and it is valid to call it on end().

That means it is valid to call advanceTo() with any monotonic key sequence.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122092 91177308-0d34-0410-b5e6-96231b3b80d8

Thumb's forced-PC-alignment requirement applies to the _total_ displacement, not just to the fragment relative
portion.  While the fragment boundary is usually already aligned, it is possible for it not to be, which
would lead to a non-aligned final displacement.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122091 91177308-0d34-0410-b5e6-96231b3b80d8

Add a transform to DAG Combiner.  This improves the
code for the case where 32-bit divide by constant is
turned into 64-bit multiply by constant.  8771012.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122090 91177308-0d34-0410-b5e6-96231b3b80d8

Fix 80 col.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122089 91177308-0d34-0410-b5e6-96231b3b80d8

Support/Path: Deprecate PathV1::isAbsolute.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122086 91177308-0d34-0410-b5e6-96231b3b80d8

PathV2: Use StringRef::substr to simplify substring creation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122085 91177308-0d34-0410-b5e6-96231b3b80d8

Allow missing kill flags on an untied operand of a two-address instruction when
the operand uses the same register as a tied operand:

  %r1 = add %r1, %r1

If add were a three-address instruction, kill flags would be required on at
least one of the uses. Since it is a two-address instruction, the tied use
operand must not have a kill flag.

This change makes the kill flag on the untied use operand optional.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122082 91177308-0d34-0410-b5e6-96231b3b80d8

Fix crash when IntervalMapOverlaps::advanceTo moves past the last overlap.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122081 91177308-0d34-0410-b5e6-96231b3b80d8

If The ARM WriteNopData() gets an unaligned byte count to pad out, fill in with
a partial value. rdar://8782954

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122078 91177308-0d34-0410-b5e6-96231b3b80d8

Missed some StringRefRefs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122077 91177308-0d34-0410-b5e6-96231b3b80d8

Add bits 31-28 to the Thumb2 encoding of TBB/TBH.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122076 91177308-0d34-0410-b5e6-96231b3b80d8

Handle 2 and 4 byte data blob fixup values for ARM.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122075 91177308-0d34-0410-b5e6-96231b3b80d8

Pass StringRefs by value, for consistency.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122074 91177308-0d34-0410-b5e6-96231b3b80d8

Add MachineLoopRange comparators for sorting loop lists by number and by area.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122073 91177308-0d34-0410-b5e6-96231b3b80d8

Reapply r121905 (automatic synthesis of @llvm.sadd.with.overflow) with a fix for a bug that manifested itself
on the DragonEgg self-host bot.  Unfortunately, the testcase is pretty messy and doesn't reduce well due to
interactions with other parts of InstCombine.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122072 91177308-0d34-0410-b5e6-96231b3b80d8

Store and free the TargetObjectWriter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122070 91177308-0d34-0410-b5e6-96231b3b80d8

Stub out explicit MCELFObjectTargetWriter interface.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122067 91177308-0d34-0410-b5e6-96231b3b80d8

Cleanup and document .gitignore.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122066 91177308-0d34-0410-b5e6-96231b3b80d8

Support: Rename Path.h to PathV1.h and add a new Path.h that includes both V1 and V2.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122065 91177308-0d34-0410-b5e6-96231b3b80d8

Move createELFObjectWriter to its own header.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122064 91177308-0d34-0410-b5e6-96231b3b80d8

SimplifyCFG: Ranges can be larger than 64 bits. Fixes Release-selfhost build.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122054 91177308-0d34-0410-b5e6-96231b3b80d8

Fix mismatched new[]/delete.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122053 91177308-0d34-0410-b5e6-96231b3b80d8

Don't feed 19 bit immediates to ILA.

Patch (slightly modified) by Visa Putkinen.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122052 91177308-0d34-0410-b5e6-96231b3b80d8

Use getFixupKindInfo to implement isFixupKindPCRel, ELF version.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122050 91177308-0d34-0410-b5e6-96231b3b80d8

improve switch formation to handle small range
comparisons formed by comparisons.  For example,
this:

void foo(unsigned x) {
  if (x == 0 || x == 1 || x == 3 || x == 4 || x == 6)
    bar();
}

compiles into:

_foo:                                   ## @foo
## BB#0:                                ## %entry
cmpl $6, %edi
ja LBB0_2
## BB#1:                                ## %entry
movl %edi, %eax
movl $91, %ecx
btq %rax, %rcx
jb LBB0_3

instead of:

_foo:                                   ## @foo
## BB#0:                                ## %entry
cmpl $2, %edi
jb LBB0_4
## BB#1:                                ## %switch.early.test
cmpl $6, %edi
ja LBB0_3
## BB#2:                                ## %switch.early.test
movl %edi, %eax
movl $88, %ecx
btq %rax, %rcx
jb LBB0_4

This catches a bunch of cases in GCC, which look like this:

 %804 = load i32* @which_alternative, align 4, !tbaa !0
 %805 = icmp ult i32 %804, 2
 %806 = icmp eq i32 %804, 3
 %or.cond121 = or i1 %805, %806
 %807 = icmp eq i32 %804, 4
 %or.cond124 = or i1 %or.cond121, %807
 br i1 %or.cond124, label %.thread, label %808

turning this into a range comparison.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122045 91177308-0d34-0410-b5e6-96231b3b80d8

MC/ARM: Use aggressive symbol folding (important for jump tables, for example).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122044 91177308-0d34-0410-b5e6-96231b3b80d8

MC/Expr: Implemnt more aggressive folding during symbol evaluation using
IsSymbolRefDifferenceFullyResolved(). For example, we will now fold away
something like:
--
_a:
...
L0:
...
L1:
...
.long (L1 - L0) / 2
--

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122043 91177308-0d34-0410-b5e6-96231b3b80d8

MC/Mach-O: On second thought, use a custom hook for enabling aggressive
IsSymbolRefDifferenceFullyResolved, it turns out this does change behavior on
enough cases for x86-32 that I would rather wait a bit on it.
 - In practice, we will want to change this eventually because it only means we
   generate less relocations (it also eliminates the need for the horrible
   '.set' hack that Darwin requires in some places).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122042 91177308-0d34-0410-b5e6-96231b3b80d8

MC/Mach-O: Implement IsSymbolRefDifferenceFullyResolved.
 - Unlike for fixups, we always do the "reliable" thing (not just for x86_64).
 - Since Darwin 'as' would typically reject things that using this will allow,
   we don't need to worry about compatibility.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122038 91177308-0d34-0410-b5e6-96231b3b80d8

MC/ObjectWriter: Add a new IsSymbolRefDifferenceFullyResolved target format specific hook.
 - Currently just has stub implementations for Mach-O, ELF, and COFF.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122037 91177308-0d34-0410-b5e6-96231b3b80d8

Provide LiveIntervalUnion::Query::checkLoopInterference.

This is a three-way interval list intersection between a virtual register, a
live interval union, and a loop. It will be used to identify interference-free
loops for live range splitting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122034 91177308-0d34-0410-b5e6-96231b3b80d8

MC/Assembler: Strip out object writer arguments, now that it is always available
-- and remove FIXME asking for the same!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122032 91177308-0d34-0410-b5e6-96231b3b80d8

MC/Assembler: Make the MCObjectWriter available through the lifetime of the
assembler.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122031 91177308-0d34-0410-b5e6-96231b3b80d8

Trailing whitespace and 80 column fixups.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122026 91177308-0d34-0410-b5e6-96231b3b80d8

MC/Target: Remove HasScatteredSymbols target hook variable, which has been
superceded and was effectively dead.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122024 91177308-0d34-0410-b5e6-96231b3b80d8

MC/Expr: Simplify.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122023 91177308-0d34-0410-b5e6-96231b3b80d8

Complete tests for IntervalMapOverlaps.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122019 91177308-0d34-0410-b5e6-96231b3b80d8

Fix crash compiling a QQQQ REG_SEQUENCE for a Neon vld3_lane operation.
Radar 8776599

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122018 91177308-0d34-0410-b5e6-96231b3b80d8

Use PairDRegs to implement ConcatVectors.  No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122017 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a comment typo.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122016 91177308-0d34-0410-b5e6-96231b3b80d8

Neon intrinsic tests need to be compiled for Cortex-A9 for f16 support.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122015 91177308-0d34-0410-b5e6-96231b3b80d8

Revert r64460. strtol and friends cannot be marked readonly, even with
a null endptr argument, because they may write to errno.

This fixes a seflhost miscompile observed on Linux targets when TBAA
was enabled.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122014 91177308-0d34-0410-b5e6-96231b3b80d8

MC: Remove another dead MCAssembler argument, and update clients.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122013 91177308-0d34-0410-b5e6-96231b3b80d8

MC: Remove dead MCAssembler argument -- Rafael, can you check the FIXME I added
here?

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122012 91177308-0d34-0410-b5e6-96231b3b80d8

MC: Simplify (remove unnecessary MCAssembler argument, obsoleted by containment
in MCAsmLayout).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122011 91177308-0d34-0410-b5e6-96231b3b80d8

Fix 80-col viola.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122010 91177308-0d34-0410-b5e6-96231b3b80d8

Write => in a more normal form.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122009 91177308-0d34-0410-b5e6-96231b3b80d8

MC/Expr: Simplify (and add a FIXME).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122008 91177308-0d34-0410-b5e6-96231b3b80d8

"Fix" FDE alignment to match what gas does.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122006 91177308-0d34-0410-b5e6-96231b3b80d8

Make pushq produce signed relocations.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122005 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-dis: Fix memory leak. ParseBitcodeFile should be taking ownership of
the MemoryBuffer*, however, it doesn't seem to delete it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122004 91177308-0d34-0410-b5e6-96231b3b80d8

Add basic test exposing many bugs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121995 91177308-0d34-0410-b5e6-96231b3b80d8

Fix MBlaze backend call instructions so that arguments passed through registers
are correctly marked as used. This removes a hack where the call instructions
marked all possible argument registers as used in the tablegen description.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121994 91177308-0d34-0410-b5e6-96231b3b80d8

Pseudo-ize the Thumb1 tBfar pattern. rdar://8777974

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121990 91177308-0d34-0410-b5e6-96231b3b80d8

MC/Expr: Add a doxyment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121988 91177308-0d34-0410-b5e6-96231b3b80d8