a redundant loopsimplify run from the default -O2 sequence.

llvm-svn: 108539

llvm-svn: 108522

llvm-svn: 108427

it *changing* the things it replaces, not just causing them
to drop to null.  There is no functionality change yet, but 
this is required for a subsequent patch.

llvm-svn: 108414

"bonus" instruction to be speculatively executed.  Add a heuristic to
ensure we're not tripping up out-of-order execution by checking that this bonus
instruction only uses values that were already guaranteed to be available.

This allows us to eliminate the short circuit in (x&1)&&(x&2).

llvm-svn: 108351

llvm-svn: 108133

llvm-svn: 108132

llvm-svn: 107984

llvm-svn: 107983

llvm-svn: 107981

llvm-svn: 107975

llvm-svn: 107974

llvm-svn: 107968

llvm-svn: 107966

llvm-svn: 107965

llvm-svn: 107516

llvm-svn: 107335

llvm-svn: 107269

llvm-svn: 107003

llvm-svn: 107002

for an "i" constraint should get lowered; PR 6309.  While
this argument was passed around a lot, this is the only
place it was used, so it goes away from a lot of other
places.

llvm-svn: 106893

llvm-svn: 106825

llvm-svn: 106824

llvm-svn: 106728

The ValueMapper used by various cloning utility maps MDNodes also.

llvm-svn: 106706

llvm-svn: 106699

Do not use "ValueMap" as a name for a local variable or an argument.

llvm-svn: 106698

llvm-svn: 106598

If a metadata operand is seeded in value map and the metadata should also be seeded in value map. This is not limited to function local metadata. 

Failure to seed metdata in such cases causes troubles when in a cloned module, metadata from a new module refers to values in old module. Usually this results in mysterious bugpoint crashes. For example,

 Checking to see if we can delete global inits: Unknown constant!
 UNREACHABLE executed at /d/g/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp:904!

llvm-svn: 106592

llvm-svn: 106591

Reapply Bob's patch.

llvm-svn: 106560

llvm-svn: 106542

llvm-svn: 106529

llvm-svn: 106528

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

llvm-svn: 106521

llvm-svn: 106508

SmallVector, and other SmallVector simplifications.

llvm-svn: 106452

llvm-svn: 106164

llvm-svn: 106047

Copy location info for current function argument from dbg.declare if respective store instruction does not have any location info.

llvm-svn: 105490