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

llvm-svn: 173632

llvm-svn: 173631

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

llvm-svn: 173629

llvm-svn: 173628

Also add some asserts.

llvm-svn: 173627

llvm-svn: 173625

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

llvm-svn: 173624

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

llvm-svn: 173623

When flipping the pair of subvectors that form a vector, if the
vector length is 2, we can use the SK_Reverse shuffle kind to get
more-accurate cost information. Also we can use the SK_ExtractSubvector
shuffle kind to get accurate subvector extraction costs.

The current cost model implementations don't yet seem complex enough
for this to make a difference (thus, there are no test cases with this
commit), but it should help in future.

Depending on how the various targets optimize and combine shuffles in
practice, we might be able to get more-accurate costs by combining the
costs of multiple shuffle kinds. For example, the cost of flipping the
subvector pairs could be modeled as two extractions and two subvector
insertions. These changes, however, should probably be motivated
by specific test cases.

llvm-svn: 173621

llvm-svn: 173620

In the AttributeSetImpl c'tor, fill in the AttrNodes data structure with the attributes being passed in.

llvm-svn: 173618

Fix that by adding a cast to the shift expander. This came up with vector shifts
on sse-less X86 CPUs.

   <2 x i64>       = shl <2 x i64> <2 x i64>
-> i64,i64         = shl i64 i64; shl i64 i64
-> i32,i32,i32,i32 = shl_parts i32 i32 i64; shl_parts i32 i32 i64

Now we cast the last two i64s to the right type. Fixes the crash in PR14668.

llvm-svn: 173615

llvm-svn: 173613

llvm-svn: 173611

out bug fixes, or functionality preserving refactorings.

llvm-svn: 173610

This name change does the following:

1. Causes the function name to use proper ARC terminology.
2. Makes it clear what the function truly does.

llvm-svn: 173609

In the future, AttributeWithIndex won't be used anymore. Besides, it exposes the
internals of the AttributeSet to outside users, which isn't goodness.

llvm-svn: 173603

In the future, AttributeWithIndex won't be used anymore. Besides, it exposes the
internals of the AttributeSet to outside users, which isn't goodness.

llvm-svn: 173602

In the future, AttributeWithIndex won't be used anymore. Besides, it exposes the
internals of the AttributeSet to outside users, which isn't goodness.

llvm-svn: 173601

In the future, AttributeWithIndex won't be used anymore. Besides, it exposes the
internals of the AttributeSet to outside users, which isn't goodness.

llvm-svn: 173600

Further removal of the introspective AttributeWithIndex thing. Also fix the #includes.

llvm-svn: 173599

llvm-svn: 173598

llvm-svn: 173580

llvm-svn: 173579

llvm-svn: 173572

This catches many cases where we can emit a more efficient shuffle for a
specific mask or when the mask contains undefs. Once the splat is lowered to
unpacks we can't do that anymore.

There is a possibility of moving the promotion after pshufb matching, but I'm
not sure if pshufb with a mask loaded from memory is faster than 3 shuffles, so
I avoided that for now.

llvm-svn: 173569

llvm-svn: 173563

llvm-svn: 173552

Add DIContext::getLineInfoForAddressRange() function and test.  This function allows a caller to obtain a table of line information for a function using the function's address and size.

llvm-svn: 173537