llvm-svn: 85662

llvm-svn: 85661

llvm-svn: 85660

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

llvm-svn: 85659

to unfold loop-invariant loads.

llvm-svn: 85657

llvm-svn: 85655

llvm-svn: 85641

llvm-svn: 85635

PHI operands by the predecessor order, sort them by the order used by the
first PHI in the block. This is still suffucient to expose duplicates.

llvm-svn: 85634

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

llvm-svn: 85626

This helps expose duplicate PHIs, which will make it easier for them
to be eliminated.

llvm-svn: 85623

llvm-svn: 85609

llvm-svn: 85498

static constructors with indirect gotos :)

llvm-svn: 85495

crash on any clang tests.

llvm-svn: 85465

llvm-svn: 85458

llvm-svn: 85457

ArraySize * ElementSize
ElementSize * ArraySize
ArraySize << log2(ElementSize)
ElementSize << log2(ArraySize)

Refactor isArrayMallocHelper and delete isSafeToGetMallocArraySize, so that there is only 1 copy of the malloc array determining logic.
Update users of getMallocArraySize() to not bother calling isArrayMalloc() as well.

llvm-svn: 85421

llvm-svn: 85402

llvm-svn: 85390

llvm-svn: 85389

purposes for GVN/DSE.

llvm-svn: 85383

Checks on Demand algorithm which looks at arbitrary branches instead of loop
iterations. This is GSoC work by Andre Tavares with only editorial changes
applied!

llvm-svn: 85382

In the new world order, BlockAddress can have a BasicBlock operand.
This doesn't permute much, because if you have a ConstantExpr (or
anything more specific than Constant) we still know the operand has
to be a Constant.

llvm-svn: 85375

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: 85197

do anything than return "I don't know" at the moment.

llvm-svn: 85189

llvm-svn: 85185

llvm-svn: 85181

llvm-svn: 85179

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

llvm-svn: 85176

the loop exiting block dominates the latch block; if ScalarEvolution
can prove that the trip-count is finite, that's sufficient.

llvm-svn: 85165

can safely use the NSW bit on the Add.

llvm-svn: 85164

llvm-svn: 85161

GEPs (more than one non-zero index) into simple GEPs (at most one
non-zero index).  In some simple experiments using this it's not
uncommon to see 3% overall code size wins, because it exposes
redundancies that can be eliminated, however it's tricky to use
because instcombine aggressively undoes the work that this pass does.

llvm-svn: 85144

llvm-svn: 85120

All of the 'demorgan' related xforms need to use 
dyn_castNotVal, not m_Not.

llvm-svn: 85119

strides for now, because it doesn't handle them correctly. This fixes a
miscompile of SingleSource/Benchmarks/Misc-C++/ray.

This problem was usually hidden because indvars transforms such induction
variables into negations of canonical induction variables.

llvm-svn: 85118