for the unroller to pretend it supports updating it.  It still
has a horrible hack for DomTree.

llvm-svn: 112444

This has the side effect of reversing the order of most of
IVUser's results.

llvm-svn: 112442

other filtering techniques, as those may allow it to filter
out more obviously unprofitable candidates.

llvm-svn: 112441

LSRInstance data structures up to date. This fixes some
pessimizations caused by stale data which will be exposed
in an upcoming change.

llvm-svn: 112440

NarrowSearchSpaceUsingHeuristics into separate functions.

llvm-svn: 112439

llvm-svn: 112438

llvm-svn: 112437

the high-level logic.

llvm-svn: 112436

llvm-svn: 112435

llvm-svn: 112434

all applicable addrecs before recursing on getMulExpr, instead of
recursing on getMulExpr for each one.

llvm-svn: 112433

operations.

llvm-svn: 112432

llvm-svn: 112431

with the Add code.

llvm-svn: 112430

llvm-svn: 112429

llvm-svn: 112428

The IDX was treated as byte index, not element index.

llvm-svn: 112422

llvm-svn: 112421

preserves domfrontier.  It does preserve AA though.

llvm-svn: 112419

require DomFrontier.  Dropping this doesn't actually save any runs
of the pass though.

llvm-svn: 112418

Among other things, this uses SSAUpdater instead of 
PromoteMemToReg.

llvm-svn: 112417

IR add/sub operations with one or both operands sign- or zero-extended.
Auto-upgrade the old intrinsics.

llvm-svn: 112416

llvm-svn: 112412

llvm-svn: 112411

This leads to much simpler code.

llvm-svn: 112410

llvm-svn: 112409

llvm-svn: 112408

getUniqueExitBlocks instead of getExitBlocks and a manual
set to eliminate dupes.

llvm-svn: 112405

llvm-svn: 112404

of the sets is volatile.  We were dropping the volatile bit of the
merged in set, leading (luckily) to assertions in cases like 
PR7535.  I cannot produce a testcase that repros with opt, but this
is obviously correct.

llvm-svn: 112402

llvm-svn: 112401

llvm-svn: 112400

- Create T2I_bin_sw_irs to be like T2I_bin_w_irs, but that it sets the S bit.

llvm-svn: 112399

llvm-svn: 112397

llvm-svn: 112395

llvm-svn: 112394

it sets the CPSR register.

llvm-svn: 112393

times.  This patch causes llc and llvm-mc (which both default to
verbose-asm) to print out comments after a few common shuffle 
instructions which indicates the shuffle mask, e.g.:

	insertps	$113, %xmm3, %xmm0     ## xmm0 = zero,xmm0[1,2],xmm3[1]
	unpcklps	%xmm1, %xmm0    ## xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
	pshufd	$1, %xmm1, %xmm1        ## xmm1 = xmm1[1,0,0,0]

This is carefully factored to keep the information extraction (of the
shuffle mask) separate from the printing logic.  I plan to move the
extraction part out somewhere else at some point for other parts of
the x86 backend that want to introspect on the behavior of shuffles.

llvm-svn: 112387

insertp[sd] $0, which is a noop.  Before:

_f32:                                   ## @f32
	pshufd	$1, %xmm1, %xmm2
	pshufd	$1, %xmm0, %xmm3
	addss	%xmm2, %xmm3
	addss	%xmm1, %xmm0
                                        ## kill: XMM0<def> XMM0<kill> XMM0<def>
	insertps	$0, %xmm0, %xmm0
	insertps	$16, %xmm3, %xmm0
	ret

after:

_f32:                                   ## @f32
	movdqa	%xmm0, %xmm2
	addss	%xmm1, %xmm2
	pshufd	$1, %xmm1, %xmm1
	pshufd	$1, %xmm0, %xmm3
	addss	%xmm1, %xmm3
	movdqa	%xmm2, %xmm0
	insertps	$16, %xmm3, %xmm0
	ret

The extra movs are due to a random (poor) scheduling decision.

llvm-svn: 112379

when the top elements of a vector are undefined.  This happens all
the time for X86-64 ABI stuff because only the low 2 elements of
a 4 element vector are defined.  For example, on:

_Complex float f32(_Complex float A, _Complex float B) {
  return A+B;
}

We used to produce (with SSE2, SSE4.1+ uses insertps):

_f32:                                   ## @f32
	movdqa	%xmm0, %xmm2
	addss	%xmm1, %xmm2
	pshufd	$16, %xmm2, %xmm2
	pshufd	$1, %xmm1, %xmm1
	pshufd	$1, %xmm0, %xmm0
	addss	%xmm1, %xmm0
	pshufd	$16, %xmm0, %xmm1
	movdqa	%xmm2, %xmm0
	unpcklps	%xmm1, %xmm0
	ret

We now produce:

_f32:                                   ## @f32
	movdqa	%xmm0, %xmm2
	addss	%xmm1, %xmm2
	pshufd	$1, %xmm1, %xmm1
	pshufd	$1, %xmm0, %xmm3
	addss	%xmm1, %xmm3
	movaps	%xmm2, %xmm0
	unpcklps	%xmm3, %xmm0
	ret

This implements rdar://8368414

llvm-svn: 112378