llvm-svn: 85725

when BB2 has its address taken.  Since it ends up doing BB2->rauw(BB1),
this can cause the address of the entry block to be taken.  Since it is
generally undesirable to nuke blocks whose address is taken, even when
we can, just unconditionally stop this xform.

llvm-svn: 85708

llvm-svn: 85704

indirectbr, thus we don't need "blockaddr(@func, null)".  Eliminate it
for simplicity.

llvm-svn: 85699

Fix CodeGenPrepare to not try to split edges from indirectbr.

llvm-svn: 85690

it abort on IndirectBrInst as describe in the comment.

llvm-svn: 85688

llvm-svn: 85680

auto-update the DominatorTree because it doesn't keep the DominatorTree
current while it works.

llvm-svn: 85670

llvm-svn: 85668

MergeBlockIntoPredecessor. This makes SimplifyCFG slightly more aggressive,
and makes it unnecessary for LoopUnroll to have its own copy of this code.

llvm-svn: 85667

llvm-svn: 85662

llvm-svn: 85660

LoopUnrollPass.cpp, for consistency with other passes which are
similarly split.

llvm-svn: 85659

llvm-svn: 85635

This reduces codesize on a variety of codes by 1-2% on x86-64. It also
helps clean up after SSAUpdater.

llvm-svn: 85626

crash on any clang tests.

llvm-svn: 85465

llvm-svn: 85458

llvm-svn: 85457

llvm-svn: 85327

llvm-svn: 85286

with multiple return values it inserts a PHI to merge them all together.
However, if the return values are all the same, it ends up with a pointless
PHI and this pointless PHI happens to really block SRoA from happening in 
at least a silly C++ example written by Doug, but probably others.  This 
fixes rdar://7339069.

llvm-svn: 85206

llvm-svn: 85181

Remove LowerAllocations pass.
Update some more passes to treate free calls just like they were treating FreeInst.

llvm-svn: 85176

VISIBILITY_HIDDEN removal.

llvm-svn: 85043

Chris claims we should never have visibility_hidden inside any .cpp file but
that's still not true even after this commit.

llvm-svn: 85042

llvm-svn: 85020

Update all analysis passes and transforms to treat free calls just like FreeInst.
Remove RaiseAllocations and all its tests since FreeInst no longer needs to be raised.

llvm-svn: 84987

llvm-svn: 84667

When an incoming value for a PHI is updated, we must also updated all other
incoming values for the same BB to match, otherwise we create invalid PHIs.

llvm-svn: 84638

where a loop's header is being split and it has predecessors which are not
contained by the most-nested loop which contains the loop.
This fixes PR5235.

llvm-svn: 84505

to name basic blocks "bb" instead of "BB", for consistency.

llvm-svn: 84502

updating the callgraph when introducing a call.

llvm-svn: 84310

llvm-svn: 84299

llvm-svn: 84256

llvm-svn: 84001

llvm-svn: 83999

for purposes other than inlining.

llvm-svn: 83997

this will increase the likelihood of common code getting sunk towards
the unwind.

llvm-svn: 83996

the IR, and to implement the FIXME'd optimization.

llvm-svn: 83748

inserted only once, just use vector.  Don't compute ExitBlocks unless we
need it, change std::sort to array_pod_sort.

llvm-svn: 83747