pass is required to paper over problems in the code generator (primarily
live variables and its clients) which doesn't really have any well defined
semantics for unreachable code.

The proper solution to this problem is to have instruction selectors not
select blocks that are unreachable.  Until we have a instruction selection
framework available for use, however, we can't expect all instruction
selector writers to do this.  Until then, this pass should be used.

llvm-svn: 14563

llvm-svn: 14562

llvm-svn: 14561

llvm-svn: 14560

Also, the RETURN instructions are not used in the sparcv9 backend.

llvm-svn: 14559

When in doubt, stamp it out!!

llvm-svn: 14558

llvm-svn: 14557

llvm-svn: 14556

llvm-svn: 14555

* Also leave space for spilling integer registers (this should be calculated)

llvm-svn: 14554

* Use the SetCC handling code in the format of Brian's V8
* Add FIXMEs where calls to functions are being made without adding them to the
  Module first... they cause missing symbols at assembly-time.

llvm-svn: 14553

llvm-svn: 14552

* Do not define CR register class because we don't (yet) have the i4 type

llvm-svn: 14551

llvm-svn: 14550

* Tabs-to-spaces

llvm-svn: 14549

llvm-svn: 14548

llvm-svn: 14547

Contributed by Vladimir Merzliakov!

llvm-svn: 14546

by Vladimir Merzliakov!

llvm-svn: 14545

llvm-svn: 14544

llvm-svn: 14543

llvm-svn: 14542

llvm-svn: 14541

llvm-svn: 14540

llvm-svn: 14539

llvm-svn: 14538

llvm-svn: 14537

llvm-svn: 14536

llvm-svn: 14535

Contributed by Vladimir Prus!

llvm-svn: 14534

llvm-svn: 14533

llvm-svn: 14532

llvm-svn: 14531

* Wrap long line

llvm-svn: 14530

llvm-svn: 14529

llvm-svn: 14528

llvm-svn: 14527

llvm-svn: 14525

any other data structures

llvm-svn: 14524

use them instead of a local LiveVariables numbering

llvm-svn: 14523