instructions.

This does not affect codegen much because SUBREG_TO_REG is only used by X86 and
X86 does not use the register scavenger, but it prevents verifier errors.

llvm-svn: 106583

Radar 8031193.

llvm-svn: 106582

llvm-svn: 106576

llvm-svn: 106574

llvm-svn: 106573

llvm-svn: 106563

Reapply Bob's patch.

llvm-svn: 106560

llvm-svn: 106557

llvm-svn: 106556

into a utility routine, teach it how to update MachineLoopInfo, and
make use of it in MachineLICM to split critical edges on demand.

llvm-svn: 106555

Measurements show that it does not speed up coalescing, so there is no reason
the keep the added complexity around.

Also clean out some unused methods and static functions.

llvm-svn: 106548

llvm-svn: 106542

llvm-svn: 106538

constant operands.

llvm-svn: 106537

llvm-svn: 106529

llvm-svn: 106528

--- Reverse-merging r106508 into '.':
U    lib/Transforms/Utils/CloneModule.cpp

llvm-svn: 106521

kill and dead flags will end up on.

llvm-svn: 106520

getNamedMetadata().

llvm-svn: 106518

llvm-svn: 106517

llvm-svn: 106516

llvm-svn: 106515

llvm-svn: 106513

in addition to the kill flags.

llvm-svn: 106512

llvm-svn: 106508

but it will cover uses of blockaddress that are actually in a function.

llvm-svn: 106502

rolling our own.

llvm-svn: 106501

llvm-svn: 106500

llvm-svn: 106499

opportunities. For example, this lets it emit this:

   movq (%rax), %rcx
   addq %rdx, %rcx

instead of this:

   movq %rdx, %rcx
   addq (%rax), %rcx

in the case where %rdx has subsequent uses. It's the same number
of instructions, and usually the same encoding size on x86, but
it appears faster, and in general, it may allow better scheduling
for the load.

llvm-svn: 106493

llvm-svn: 106486

Radar 8104310.

llvm-svn: 106484

being moved around away from the jump table it references. rdar://8104340

llvm-svn: 106483

llvm-svn: 106482

Fix PR7421: bug in kill transferring logic. It was ignoring loads / stores which have already been processed.

llvm-svn: 106481

"This is just a cosmetic change in MCAsmStreamer.cpp/EmitSymbolAttribute: all attributes have now a \t before and after, as done for '.type'.
 
This makes the output look consistent, as well as help some third party assemblers expecting the attributes to be in the second column."

Patch by Arnaud de Grandmaison!

llvm-svn: 106469

llvm-svn: 106467

llvm-svn: 106466

llvm-svn: 106465

llvm-svn: 106457