load of a GV from constantpool and then add pc. It allows the code sequence to
  be rematerializable so it would be hoisted by machine licm.
- Add a late pass to break these pseudo instructions into a number of real
  instructions. Also move the code in Thumb2 IT pass that breaks up t2MOVi32imm
  to this pass. This is done before post regalloc scheduling to allow the
  scheduler to proper schedule these instructions. It also allow them to be
  if-converted and shrunk by later passes.

llvm-svn: 86304

Use NEON reg-reg moves, where profitable. This reduces "domain-cross" stalls, when we used to mix vfp and neon code (the former were used for reg-reg moves)

llvm-svn: 85764

Remove ARM specific getInlineAsmLength. We'll rely on the simpler (and faster) generic algorithm for now. If more accurate computation is needed, we'll rely on the disassembler.

llvm-svn: 78032

the only real caller (GetFunctionSizeInBytes) uses it.

The custom ARM implementation of this is basically reimplementing
an assembler poorly for negligible gain.  It should be removed 
IMNSHO, but I'll leave that to ARMish folks to decide.

llvm-svn: 77877

- This change also makes it possible to switch between ARM / Thumb on a
  per-function basis.
- Fixed thumb2 routine which expand reg + arbitrary immediate. It was using
  using ARM so_imm logic.
- Use movw and movt to do reg + imm when profitable.
- Other code clean ups and minor optimizations.

llvm-svn: 77300

Correctly handle the Thumb-2 imm8 addrmode. Specialize frame index elimination more exactly for Thumb-2 to get better code gen.

llvm-svn: 76919

Fix frame index elimination to correctly handle thumb-2 addressing modes that don't allow negative offsets. During frame elimination convert *i12 opcode to a *i8 when necessary due to a negative offset.

llvm-svn: 76883

Avoid remat'ing instructions whose def have sub-register indices for now. It's just really really hard to get all the cases right.

llvm-svn: 75900

Checkpoint Thumb2 Instr info work. Generalized base code so that it can be shared between ARM and Thumb2. Not yet activated because register information must be generalized first.

llvm-svn: 75010

Add a Thumb2 instruction flag to that indicates whether the instruction can be transformed to 16-bit variant.

llvm-svn: 74988

Checkpoint refactoring of ThumbInstrInfo and ThumbRegisterInfo into Thumb1InstrInfo, Thumb2InstrInfo, Thumb1RegisterInfo and Thumb2RegisterInfo. Move methods from ARMInstrInfo to ARMBaseInstrInfo to prepare for sharing with Thumb2.

llvm-svn: 74731

llvm-svn: 74658

llvm-svn: 74500

After much back and forth, I decided to deviate from ARM design and split LDR into 4 instructions (r + imm12, r + imm8, r + r << imm12, constantpool). The advantage of this is 1) it follows the latest ARM technical manual, and 2) makes it easier to reduce the width of the instruction later. The down side is this creates more inconsistency between the two sub-targets. We should split ARM LDR instruction in a similar fashion later. I've added a README entry for this.

llvm-svn: 74420

llvm-svn: 74384

Step 1: ARMInstructionInfo => {ARM,Thumb}InstructionInfo

llvm-svn: 74329

This is still a work in progress but most of the NEON instruction set
is supported.

llvm-svn: 73919

suprise to some callers, e.g. register coalescer. For now, add an parameter
that tells AnalyzeBranch whether it's safe to modify the mbb. A better
solution is out there, but I don't have time to deal with it right now.

llvm-svn: 64124

llvm-svn: 63938

llvm-svn: 62600

parts, and add target-independent code to add/preserve
MachineMemOperands.

llvm-svn: 60488

llvm-svn: 59542

llvm-svn: 59275

llvm-svn: 59230

llvm-svn: 59109

llvm-svn: 59107

llvm-svn: 59104

llvm-svn: 59088

llvm-svn: 59084

llvm-svn: 59074

llvm-svn: 59016

llvm-svn: 58828

llvm-svn: 58818

- Consolidate instruction formats.
- Other clean up.

llvm-svn: 58808

llvm-svn: 58800

llvm-svn: 58793

llvm-svn: 58789

Restructure ARM code emitter to use instruction formats instead of addressing modes to determine how to encode instructions.

llvm-svn: 58764

Add binary encoding support for multiply instructions. Some blanks left to fill in, but the basics are there.

llvm-svn: 58626

llvm-svn: 57622