llvm-svn: 122444

better name and matches what is used in the MachO writer.

llvm-svn: 122443

llvm-svn: 122441

llvm-svn: 122438

llvm-svn: 122427

llvm-svn: 122419

the original instruction, half the cases were missed (making it not
wrong but suboptimal).  Also correct a typo (A <-> B) in the second
chunk. 

llvm-svn: 122414

llvm-svn: 122413

esp. important given that the LOCAL_SECTDIFF enumeration got redefined.

llvm-svn: 122412

MC/Mach-O/ARM: Clone off an ARM version of RecordScatteredRelocation until I figure out how it is supposed to work.

llvm-svn: 122410

llvm-svn: 122409

llvm-svn: 122408

llvm-svn: 122407

llvm-svn: 122406

llvm-svn: 122405

llvm-svn: 122404

RecordRelocation with lots of FIXMEs.

llvm-svn: 122402

llvm-svn: 122401

clear how to keep in the generic path (yet).
 - Will revisit when it actually works.

llvm-svn: 122400

if both A op B and A op C simplify.  This fires fairly often but doesn't
make that much difference.  On gcc-as-one-file it removes two "and"s and
turns one branch into a select.

llvm-svn: 122399

llvm-svn: 122398

instcombine is compared to instsimplify.

llvm-svn: 122397

Patch by Wesley Peck!

llvm-svn: 122395

loads properly.  We miscompiled the testcase into:

_test:                                  ## @test
	movl	$128, (%rdi)
	movzbl	1(%rdi), %eax
	ret

Now we get a proper:

_test:                                  ## @test
	movl	$128, (%rdi)
	movsbl	(%rdi), %eax
	movzbl	%ah, %eax
	ret

This fixes PR8757.

llvm-svn: 122392

unhanded cases faster and simplify code.

llvm-svn: 122391

llvm-svn: 122389

llvm-svn: 122385

llvm-svn: 122384

llvm-svn: 122381

llvm-svn: 122379

I still think that LVI should be handling this, but that capability is some ways off in the future,
and this matters for some significant benchmarks.

llvm-svn: 122378

types, but they're just getting converted to unsigned anyway, so cast first
(and ask questions later).

llvm-svn: 122377

llvm-svn: 122371

the same physical register. Simplifies the fix from the previous
checkin r122211.

llvm-svn: 122370

llvm-svn: 122368

the shift type was needed one place, the shift count
type another.  The transform in 123555 had the same
problem.

llvm-svn: 122366

(add Y, (sete  X, 0)) -> cmp X, 1; adc  0, Y
(add Y, (setne X, 0)) -> cmp X, 1; sbb -1, Y
(sub (sete  X, 0), Y) -> cmp X, 1; sbb  0, Y
(sub (setne X, 0), Y) -> cmp X, 1; adc -1, Y

for
  unsigned foo(unsigned a, unsigned b) {
    if (a == 0) b++;
    return b;
  }
we now get:
  foo:
    cmpl  $1, %edi
    movl  %esi, %eax
    adcl  $0, %eax
    ret
instead of:
  foo:
    testl %edi, %edi
    sete  %al
    movzbl  %al, %eax
    addl  %esi, %eax
    ret

llvm-svn: 122364

llvm-svn: 122362

llvm-svn: 122360

the folding it can.

llvm-svn: 122359