New live ranges are assigned in long -> short order, but live ranges that have
been evicted at least once are deferred and assigned in short -> long order.

Also disable splitting and spilling for live ranges seen for the first time.

The intention is to create a realistic interference pattern from the heavy live
ranges before starting splitting and spilling around it.

llvm-svn: 126451

llvm-svn: 126450

llvm-svn: 126445

Introduce a variable in the AsmParserExtension whether [] is valid in an
expression. If it is true, parse them like (). Enable this for ELF only.

llvm-svn: 126443

llvm-svn: 126441

Patch by Nathan Jeffords!

llvm-svn: 126425

Limit the folding of any_ext and sext  into the load operation to scalars.
Limit the active-bits trunc optimization to scalars.
Document vector trunc and vector sext in LangRef.

Similar to commit 126080 (for enabling zext).

llvm-svn: 126424

The problem was codegen guessing the wrong values and printing

	.section	.eh_frame,"aMS",@progbits,4

It is not clear at all if Codegen should try to guess, MC is the
one that should know the default flags.

llvm-svn: 126421

llvm-svn: 126398

llvm-svn: 126397

llvm-svn: 126384

- Don't leak parsed operands during tokenization.
- Don't leak printed insts in llvm-mc.

llvm-svn: 126381

registers at phis. This enables us to eliminate a lot of pointless zexts during
the DAGCombine phase. This fixes <rdar://problem/8760114>.

llvm-svn: 126380

llvm-svn: 126379

a block is visited before all of its predecessors.

llvm-svn: 126378

llvm-svn: 126377

and make the actual map private.

llvm-svn: 126376

allows for the information propagated across basic blocks to be merged at phis.

llvm-svn: 126375

trivial places.  This pass needs a lot of work.

llvm-svn: 126367

to reduce nesting.  This needs to be turned into a table.

llvm-svn: 126366

function prototype into a call to a varargs prototype.  We do
allow the xform if we have a definition, but otherwise we don't
want to risk that we're changing the abi in a subtle way.  On
X86-64, for example, varargs require passing stuff in %al.

llvm-svn: 126363

operands starts at index 2, not 1.
rdar://9045024
PR9305

llvm-svn: 126359

register.

This avoids some silly stack slot shuffling when both sides of a copy get
spilled.

llvm-svn: 126353

Use DW_FORM_data2 for DW_AT_language and let users use DW_LANG_lo_user=0x8000 to DW_LANG_hi_user=0xffff range.

llvm-svn: 126339

enabled for all targets. Non-X86 targets should not have this behavior
enabled by default.

Joerg, if you would like to resubmit with the behavior conditionalized to be
X86-ELF only, that's fine.

llvm-svn: 126336

Fixes PR9292.

llvm-svn: 126330

llvm-svn: 126322

events on the thread and wait until a resource is ready to event. The vector
of the resource that is ready is returned.

llvm-svn: 126320

No code will be inserted after the split point anyway.

llvm-svn: 126319

llvm-svn: 126315

llvm-svn: 126314

llvm-svn: 126313

it to ignore valid uses of FS and GS as additional
base registers in address computations.  Added a test
case for this.

llvm-svn: 126302

llvm-svn: 126298

r124468.  Patch by Rafael Avila de Espindola!

llvm-svn: 126297

The previous codegen for the slow path (when values are in VFP / NEON
registers) was incorrect if the source is NaN.

The new codegen uses NEON vbsl instruction to copy the sign bit. e.g.
        vmov.i32        d1, #0x80000000
        vbsl    d1, d2, d0
If NEON is not available, it uses integer instructions to copy the sign bit.
rdar://9034702

llvm-svn: 126295

When a large live range is evicted, it will usually be split when it comes
around again. By deferring evicted live ranges, the splitting happens at a time
when the interference pattern is more realistic. This prevents repeated
splitting and evictions.

llvm-svn: 126282

llvm-svn: 126277

Use interval sizes instead of spill weights to determine if it is legal to evict
interference. A smaller interval can evict interference if all interfering live
ranges are larger.

Allow multiple interferences to be evicted as along as they are all larger than
the live range being allocated.

Spill weights are still used to select the preferred eviction candidate.

llvm-svn: 126276

[AVX] General VUNPCKL codegen support.

llvm-svn: 126264