llvm-svn: 55766

llvm-svn: 55745

llvm-svn: 55744

Initial version of a Partial Specialization IPO pass.  It triggers a couple hundred times on 176.gcc.  I don't know the performance impact yet, the heuristic is quite simple still.

llvm-svn: 55734

llvm-svn: 55720

llvm-svn: 55717

llvm-svn: 55716

llvm-svn: 55713

llvm-svn: 55712

llvm-svn: 55711

llvm-svn: 55708

llvm-svn: 55690

llvm-svn: 55682

llvm-svn: 55680

llvm-svn: 55678

llvm-svn: 55676

llvm-svn: 55674

llvm-svn: 55673

attributes on functions, based on the result of
alias analysis.  It's not hardwired to use
GlobalsModRef even though this is the only (AFAIK)
alias analysis that results in this pass actually
doing something.  Enable as follows:
  opt ... -globalsmodref-aa -markmodref ...
Advantages of this pass: (1) records the result
of globalsmodref in the bitcode, meaning it is
available for use by later passes (currently
the pass manager isn't smart enough to magically
make an advanced alias analysis available to all
later passes), which may expose more optimization
opportunities; (2) hopefully speeds up compilation
when code is optimized twice, for example when a
file is compiled to bitcode, then later LTO is done
on it: marking functions readonly/readnone when
producing the initial bitcode should speed up alias
analysis during LTO; (3) good for discovering that
globalsmodref doesn't work very well :)
Not currently turned on by default.

llvm-svn: 55604

llvm-svn: 55433

llvm-svn: 55424

Put a heuristic in place to prevent GVN from falling into bad cases with massively complicated CFGs.
This speeds up a particular testcase from 12+ hours to 5 seconds with little perceptible loss of quality.

llvm-svn: 55391

llvm-svn: 55374

llvm-svn: 55271

patch contributed by m-s!

llvm-svn: 55270

use raw_ostream instead of std::ostream.  Among other goodness,
this speeds up llvm-dis of kc++ with a release build from 0.85s
to 0.49s (88% faster).

Other interesting changes:
 1) This makes Value::print be non-virtual.
 2) AP[S]Int and ConstantRange can no longer print to ostream directly, 
    use raw_ostream instead.
 3) This fixes a bug in raw_os_ostream where it didn't flush itself 
    when destroyed.
 4) This adds a new SDNode::print method, instead of only allowing "dump".


A lot of APIs have both std::ostream and raw_ostream versions, it would
be useful to go through and systematically anihilate the std::ostream 
versions.

This passes dejagnu, but there may be minor fallout, plz let me know if
so and I'll fix it.

llvm-svn: 55263

before/after effects of a pass, crazy!

llvm-svn: 55230

indices that start with an array subscript.  x->field[10000] is just 
as bad as (*X)[14][10000].

llvm-svn: 55226

Patch contributed by m-s.

llvm-svn: 55167

slowdown in bzip2.

llvm-svn: 55113

llvm-svn: 55087

llvm-svn: 55035

llvm-svn: 54979

predicate, swap the order of the operands.

llvm-svn: 54907

produce an xor by 127.

llvm-svn: 54906

In particular, Collector was confusing to implementors. Several
thought that this compile-time class was the place to implement
their runtime GC heap. Of course, it doesn't even exist at runtime.
Specifically, the renames are:

  Collector               -> GCStrategy
  CollectorMetadata       -> GCFunctionInfo
  CollectorModuleMetadata -> GCModuleInfo
  CollectorRegistry       -> GCRegistry
  Function::getCollector  -> getGC (setGC, hasGC, clearGC)

Several accessors and nested types have also been renamed to be
consistent. These changes should be obvious.

llvm-svn: 54899

llvm-svn: 54878

llvm-svn: 54877

the predicate.

Also, make this optz'n apply in more cases where it's safe to do so.

llvm-svn: 54876

returning an std::string by value, it fills in a SmallString/SmallVector
passed in.  This significantly reduces string thrashing in some cases.

More specifically, this:
 - Adds an operator<< and a print method for APInt that allows you to 
   directly send them to an ostream.
 - Reimplements APInt::toString to be much simpler and more efficient
   algorithmically in addition to not thrashing strings quite as much.

This speeds up llvm-dis on kc++ by 7%, and may also slightly speed up the
asmprinter.  This also fixes a bug I introduced into the asmwriter in a
previous patch w.r.t. alias printing.

llvm-svn: 54873