llvm-svn: 92733

RecursivelyDeleteDeadPHINode, and DeleteDeadPHIs return a flag
indicating whether they made any changes.

llvm-svn: 92732

in this context.

llvm-svn: 92731

a single pointer (PointerIntPair) member. In "small" mode, the
pointer field is reinterpreted as a set of bits. In "large" mode,
the pointer points to a heap-allocated object.

Also, give BitVector empty and swap functions.

And, add some simple unittests for BitVector and SmallBitVector.

llvm-svn: 92730

llvm-svn: 92727

Avoid going through the LLVMContext for type equality where it's safe to dereference the type pointer.

llvm-svn: 92726

llvm-svn: 92712

it does make sense to keep them together, at least for now.

llvm-svn: 92711

llvm-svn: 92710

llvm-svn: 92709

llvm-svn: 92708

llvm-svn: 92707

leading/trailing bits.  Patch by Alastair Lynn!

llvm-svn: 92706

llvm-svn: 92705

dyn_castNotVal in the X+~X transform.  dyn_castNotVal is
dramatic overkill for what the xform needed.

llvm-svn: 92704

and simplify.

llvm-svn: 92700

llvm-svn: 92697

llvm-svn: 92695

llvm-svn: 92694

Eliminate the 'AddMaskingAnd' transformation, it is redundant with this
more general code right below it:
  // A+B --> A|B iff A and B have no bits set in common.

llvm-svn: 92693

that got instantiated.  There is no reason for instcombine
to try this hard for simple associative optimizations.  Next
up, eliminate the template completely.

llvm-svn: 92692

llvm-svn: 92689

llvm-svn: 92688

llvm-svn: 92687

llvm-svn: 92685

llvm-svn: 92684

llvm-svn: 92683

llvm-svn: 92682

llvm-svn: 92681

llvm-svn: 92679

llvm-svn: 92674

These should probably be errs().

llvm-svn: 92673

 Intrinsic::dbg_stoppoint
 Intrinsic::dbg_region_start
 Intrinsic::dbg_region_end
 Intrinsic::dbg_func_start

llvm-svn: 92672

llvm-svn: 92671

Fix a build error by adding a missing commit.

llvm-svn: 92670

Fix a build error and change errs() to dbgs().

llvm-svn: 92669

llvm-svn: 92667

llvm-svn: 92666

llvm-svn: 92665

llvm-svn: 92664