Because BBVectorize may significantly shorten a loop body, unroll
again after vectorization. This is especially important when using
runtime or partial unrolling.

llvm-svn: 173730

This function will be used in future commits.

llvm-svn: 173729

llvm-svn: 173725

The AttributeWithIndex class exposed the interior structure of the AttributeSet
class. That was gross. Remove it and all of the code that relied upon it.

llvm-svn: 173722

llvm-svn: 173712

Remove the use of the 't' length modifier to avoid a gcc warning. Based
on usage, 32 bits of precision is good enough for printing a stack
offset for a stack trace.

't' length modifier isn't in C++03 but it *is* in C++11. Added a FIXME
to reintroduce once LLVM makes the switch to C++11.

Reviewer: gribozavr
llvm-svn: 173711

The common code in the post-RA scheduler to break anti-dependencies on the
critical path contained a flaw.  In the reported case, an anti-dependency
between the overlapping registers %X4 and %R4 exists:

	%X29<def> = OR8 %X4, %X4
	%R4<def>, %X3<def,dead,tied3> = LBZU 1, %X3<kill,tied1>

The unpatched code breaks the dependency by replacing %R4 and its uses
with %R3, the first register on the available list.  However, %R3 and
%X3 overlap, so this creates two overlapping definitions on the same
instruction.

The fix is straightforward, preventing selection of a register that
overlaps any other defined register on the same instruction.

The test case is reduced from the bug report, and verifies that we no
longer produce "lbzu 3, 1(3)" when breaking this anti-dependency.

llvm-svn: 173706

llvm-svn: 173698

llvm-svn: 173691

It is way too slow. Change the default option value to 0.
Always do exact shadow propagation for unsigned ICmp with constants, it is
cheap (under 1% cpu time) and required for correctness.

llvm-svn: 173682

Broken tests.

llvm-svn: 173679

50% slowdown on one of the specs.

llvm-svn: 173678

llvm-svn: 173674

A bugfix for tblgen, in the function ‘emitSourceFileHeader’.
When the first parameter (‘Desc’) is more than 80 characters long, it will result the header line that contains the description to be more
Than (4GB!) long. Not only it takes forever to produce, the output file cannot be open, since its ginormous.

Patch by Elior Malul.

llvm-svn: 173672

Add missing break in 256-bit palignr comment printing. No test case yet because the comment itself is still wrong.

llvm-svn: 173669

llvm-svn: 173667

Created ObjCARCUtil.cpp for functions which in my humble opinion are too large to static inline and place in a header file such as ObjCARC.h.

llvm-svn: 173666

llvm-svn: 173664

llvm-svn: 173663

llvm-svn: 173662

llvm-svn: 173661

This now uses the AttributeSet object instead of the Attribute /
AttributeWithIndex objects. It's fairly simple now. It goes through all of the
subsets before the one we're modifying, adds them to the new set. It then adds
the modified subset (with the requested attributes removed). And then adds the
rest of the subsets.

llvm-svn: 173660

This now uses the AttributeSet object instead of the Attribute /
AttributeWithIndex objects. It's fairly simple now. It goes through all of the
subsets before the one we're modifying, adds them to the new set. It then adds
the modified subset. And then adds the rest of the subsets.

llvm-svn: 173659

Unfortunately, msvc miscompiles it. Investigating.

llvm-svn: 173656

llvm-svn: 173654

llvm-svn: 173653

llvm-svn: 173652

I also added the local header ObjCARC.h for common functions used by the
various passes.

llvm-svn: 173651

llvm-svn: 173649

Extracted ObjCARC.cpp into its own library libLLVMObjCARCOpts in preparation for refactoring the ARC Optimizer.

llvm-svn: 173647

llvm-svn: 173646

llvm-svn: 173644

llvm-svn: 173642

We want to remove AttributeWithIndex because it provides a non-encapsulated view
of the AttributeSetImpl object. Instead, use accessor methods and iterators.

Eventually, this code can be simplified because the Attribute object will hold
only one attribute instead of multiple attributes.

llvm-svn: 173641

llvm-svn: 173640

llvm-svn: 173639

llvm-svn: 173638

Push the calculation of the 'Raw' attribute mask down into the implementation. It in turn uses the correct list for calculating the 'Raw' value.

llvm-svn: 173637

Add special 'get' methods to create an Attribute with an alignment. Also do some random cleanup. No functionality change.

llvm-svn: 173635

These instructions are not targeted by the compiler but they are
needed for the MC layer.

llvm-svn: 173634