This also registers the pass with opt with a -lower-packed command line
option.

Patch contributed by Brad Jones.

llvm-svn: 15987

spew warnings, even if the types don't match.

llvm-svn: 15933

This allows more globals to be marked constant, particularly global arrays.

llvm-svn: 15735

block (common in a switch), make sure to remove extra edges in successor
blocks.  This fixes CodeExtractor/2004-08-12-BlockExtractPHI.ll and should
be pulled into LLVM 1.3 (though the regression test need not be, as that
would require pulling in the LoopExtract.cpp changes).

llvm-svn: 15717

the extracted code was, instead of putting it at the end of the function

llvm-svn: 15716

llvm-svn: 15714

Nate ran into when bugpointing siod.  This fix should go into LLVM 1.3

llvm-svn: 15712

instructions in the body of the function (not the entry block).  This fixes
test/Programs/SingleSource/Regression/C/2004-08-12-InlinerAndAllocas.c
and test/Programs/External/SPEC/CINT2000/176.gcc on zion.

This should obviously be pulled into 1.3.

llvm-svn: 15684

run into.  This should go into 1.3

llvm-svn: 15679

llvm-svn: 15676

176.gcc.  Note that this is apparently not the only bug miscompiling gcc
though. :(

llvm-svn: 15639

This should go into the 1.3 branch

llvm-svn: 15593

dangling constant users were removed from a function, causing it to be dead,
we never removed the call graph edge from the external node to the function.

In most cases, this didn't cause a problem (by luck).  This should definitely
go into 1.3

llvm-svn: 15570

1. Fix a REALLY nasty cyclic replacement issue that Anshu discovered, causing
   nondeterminstic crashes and memory corruption.
2. For performance, don't go inserting constantexpr casts of GV pointers.

This should definitely go into 1.3

llvm-svn: 15568

should go into 1.3

llvm-svn: 15567

llvm-svn: 15487

llvm-svn: 15410

llvm-svn: 15369

llvm-svn: 15343

llvm-svn: 15342

llvm-svn: 15337

llvm-svn: 15334

llvm-svn: 15328

llvm-svn: 15325

This change fixed a bug in the function visitMul.  The prior version
assumed that a constant on the RHS of a multiplication was either an
IntConstant or an FPConstant.  It checked for an IntConstant and then,
if it did not find one, did a hard cast to an FPConstant.  That code
would crash if the RHS were a ConstantExpr that was neither an
IntConstant nor an FPConstant.  This version replaces the hard cast
with a dyn_cast.  It performs the same way for IntConstants and
FPConstants but does nothing, instead of crashing, for constant
expressions.

The regression test for this change is 2004-07-27-ConstantExprMul.ll.

llvm-svn: 15291

llvm-svn: 15276

llvm-svn: 15263

end of the function (either return or unwind)

llvm-svn: 15232

llvm-svn: 15227

  a bug in DSE).
* Delete dead operand uses iteratively instead of recursively, using a
  SetVector.
* Defer deletion of dead operand uses until the end of processing, which means
  we don't have to bother with updating the AliasSetTracker.  This speeds up
  DSE substantially.

llvm-svn: 15204

llvm-svn: 15199

llvm-svn: 15162

can be improved in many ways.  But: stop laughing, even with -basicaa it
deletes 15% of the stores in 252.eon :)

llvm-svn: 15101

to the field being updated.  Patch contributed by Tobias Nurmiranta

llvm-svn: 15097

llvm-svn: 15089

* Test for whether bits are shifted out during the optzn.

If so, the fold is illegal, though it can be handled explicitly for setne/seteq

This fixes the miscompilation of 254.gap last night, which was a latent bug
exposed by other optimizer improvements.

llvm-svn: 15085

"simplify" a bit of code for comparison/and folding

llvm-svn: 15082

the appopriate size.  This gives us the ability to eliminate int -> ptr -> int

llvm-svn: 15063

return, clone the 'ret' BB code into the block AFTER the inlined call, not the
other way around.

llvm-svn: 15030

llvm-svn: 15029