Add early coalescing to liveintervals. This is work in progress and is known to miscompute some tests. Read it at your own rish, I have aged 10 year while writing this.

The gist of this is if source of some of the copies that feed into a phi join is defined by the phi join, we'd like to eliminate them. However, if any of the non-identity source overlaps the live interval of the phi join then the coalescer won't be able to coalesce them. The early coalescer's job is to eliminate the identity copies by partially-coalescing the two live intervals.

llvm-svn: 81796

created once, so shouldn't be stuck in the middle of the loop. Also early exit
if there are no uses of UnwindInst in the function.

llvm-svn: 81785

llvm-svn: 81773

llvm-svn: 81770

llvm-svn: 81757

llvm-svn: 81755

full AsmPrinter, and change TargetRegistry to keep track
of registered MCInstPrinters.

llvm-mc is still linking in the entire
target foo to get the code emitter stuff, but this is an
important step in the right direction.

llvm-svn: 81754

llvm-svn: 81750

been told that the type is no longer abstract.

llvm-svn: 81749

be a MCInstPrinter.

llvm-svn: 81746

llvm-svn: 81745

llvm-svn: 81744

llvm-svn: 81736

Also break the type verification stuff into its own TypeSet to keep the
Verifier pass from becoming an AbstractTypeUser.

llvm-svn: 81729

llvm-svn: 81727

llvm-svn: 81726

llvm-svn: 81723

llvm-svn: 81718

change as types are refined. Remove abstract types from CheckedTypes when they
we're informed that they have been refined. The only way types get refined in
the verifier is when later function passes start optimizing. Fixes PR4970.

llvm-svn: 81716

llvm-svn: 81714

the object, make it static instead of const.

llvm-svn: 81711

of getting it from TRI, inst printing now is codegen context
free!

llvm-svn: 81710

Nothing is using this info yet.

llvm-svn: 81707

llvm-svn: 81705

all the other targets.  Add support for weak/linkonce linkage so it doesn't
crash on basically all nontrivial testcases.

llvm-svn: 81704

class into its own X86ATTInstPrinter class.  The inst
printer now has just one dependence on the code generator
(TRI).

llvm-svn: 81703

llvm-svn: 81699

has real information about linker private linkage.

llvm-svn: 81695

llvm-svn: 81689

Change the picbase symbol on non-darwin systems from ".Lllvm$4.$piclabel" to
".L4$pb".  The actual name doesn't matter and the darwin name is shorter.

llvm-svn: 81688

llvm-svn: 81685

now that printBasicBlockLabel is only used for starting
a MBB.  This allows elimination of a bunch of arguments.

llvm-svn: 81684

fix MCSymbol printing on darwin to exactly match the mangler (handling of \n and " in a symbol name).

llvm-svn: 81683

for systems that don't support quoting (PR4966).

llvm-svn: 81682

instead.

llvm-svn: 81677

llvm-svn: 81658

with subreg - superreg mapping and also fix PR4965.

llvm-svn: 81657

 - Could we just always implement this as __clear_cache for __GNUC__?

llvm-svn: 81655

Move GetMBBSymbol up to AsmPrinter and make printBasicBlockLabel use it so that
we only have one place that decides what to name bb labels.  Hopefully various
clients of printBasicBlockLabel can start using GetMBBSymbol instead.

llvm-svn: 81652

llvm-svn: 81636