is another max which folds. This fixes PR7454.

llvm-svn: 106594

SmallVector, and other SmallVector simplifications.

llvm-svn: 106452

llvm-svn: 106397

use sharing map. The reconcileNewOffset logic already forces a
separate use if the kinds differ, so incorporating the kind in the
key means we can track more sharing opportunities.

More sharing means fewer total uses to track, which means smaller
problem sizes, which means the conservative throttles don't kick
in as often.

llvm-svn: 106396

llvm-svn: 106395

register pressure.

llvm-svn: 105501

llvm-svn: 104290

llvm-svn: 104287

top-level LSRInstance logic.

llvm-svn: 104278

llvm-svn: 104276

aren't needed.

llvm-svn: 104273

Changed directly instead of using a return value.

Rename FilterOutUndesirableDedicatedRegisters's Changed variable to
distinguish it from LSRInstance's Changed member.

llvm-svn: 104269

llvm-svn: 104268

llvm-svn: 104267

llvm-svn: 104263

operand on the left, the interesting operand is on the right. This
fixes a bug where LSR was failing to recognize ICmpZero uses,
which led it to be unable to reverse the induction variable in the
attached testcase.

Delete test/CodeGen/X86/stack-color-with-reg-2.ll, because its test
is extremely fragile and hard to meaningfully update.

llvm-svn: 104262

it isn't a very interesting change, it's a change nonetheless.

llvm-svn: 104260

llvm-svn: 104234

llvm-svn: 104232

and fix a bug that valgrind noticed where the code would std::swap an
element with itself.

llvm-svn: 104225

the addressing modes don't make this trivially easy. This allows
it to avoid falling into the less precise heuristics in more
cases.

llvm-svn: 104186

llvm-svn: 104089

constants in registers which partially cancel out their immediate fields.

llvm-svn: 104088

of its formulae have been removed into a helper function, and also
teach it how to update the RegUseTracker.

llvm-svn: 104087

function.

llvm-svn: 104082

llvm-svn: 104080

a helper function.

llvm-svn: 104079

llvm-svn: 104078

is inconsistent with the BaseRegs field. It's not print's job to
assert on an invalid condition, but it can make one more obvious.

llvm-svn: 104077

confusion with LSRInstance's RegUses member.

llvm-svn: 104076

llvm-svn: 103457

LSRUse's Regs set after all pruning is done, rather than trying
to do it on the fly, which can produce an incomplete result.

This fixes a case where heuristic pruning was stripping all
formulae from a use, which led the solver to enter an infinite
loop.

Also, add a few asserts to diagnose this kind of situation.

llvm-svn: 103328

same, now that getConstant has overloads consistent with ConstantInt::get.

llvm-svn: 102965

that indvars may use, now that indvars is recognizing le and ge loops.

llvm-svn: 102235

misses an opportunity to fold add operands, but folds them
after LSR has separated them out. This fixes rdar://7886751.

llvm-svn: 102157

just ask ScalarEvolution for it on demand. This helps IVUsers be more robust
in the case of expressions changing underneath it. This fixes PR6862.

llvm-svn: 101819

llvm-svn: 101033

into adjacent loops. Also, ensure that the insert position is
dominated by the loop latch of any loop in the post-inc set which
has a latch.

llvm-svn: 100906

so that an unfortunately placed bitcast doesn't pin a value in a
register.

llvm-svn: 100883

a separate function.

llvm-svn: 100845