Turn on -Wunused and -Wno-unused-parameter. Clean up most of the resulting
fall out by removing unused variables. Remaining warnings have to do with
unused functions (I didn't want to delete code without review) and unused
variables in generated code. Maintainers should clean up the remaining
issues when they see them. All changes pass DejaGnu tests and Olden.

llvm-svn: 31380

Replace the REM instruction with UREM, SREM and FREM.

llvm-svn: 31369

llvm-svn: 31362

This fixes http://llvm.org/bugs/show_bug.cgi?id=979

llvm-svn: 31358

llvm-svn: 31352

llvm-svn: 31346

result.  This can significantly shrink code and exposes identities more
aggressively.

llvm-svn: 31344

llvm-svn: 31342

This triggers thousands of times on multisource.

llvm-svn: 31341

Transforms/LCSSA/2006-10-31-UnreachableBlock-2.ll

llvm-svn: 31317

llvm-svn: 31315

llvm-svn: 31284

llvm-svn: 31258

llvm-svn: 31257

llvm-svn: 31256

llvm-svn: 31255

llvm-svn: 31248

   InsertNewInstBefore(new CastInst(Val, ValTy, Val->GetName()), I)
into:
   InsertCastBefore(Val, ValTy, I)

llvm-svn: 31204

Make necessary changes to support DIV -> [SUF]Div. This changes llvm to
have three division instructions: signed, unsigned, floating point. The
bytecode and assembler are bacwards compatible, however.

llvm-svn: 31195

produce an EQ property.

llvm-svn: 31193

Fix and comment the "or", "and" and "xor" transformations.

llvm-svn: 31189

llvm-svn: 31184

llvm-svn: 31151

passes llvm-gcc bootstrap.

llvm-svn: 31146

Prolangs-C/agrep and SCCP/2006-10-23-IPSCCP-Crash.ll

llvm-svn: 31132

property is added by running through the list of uses of the value and
adding resolved properties to the property set.

llvm-svn: 31126

llvm-svn: 31123

llvm-svn: 31121

optimization opportunity pointed out by Chris Lattner.

llvm-svn: 31118

opportunity pointed out by Andrew Lewycky.

llvm-svn: 31115

transformation.  This speeds up a C++ app 2.25x.

llvm-svn: 31113

1. Better document what is going on here.
2. Only hack on one branch per iteration, making the results less conservative.
3. Handle the problematic case by marking edges executable instead of by
   playing with value lattice states.  This is far less pessimistic, and fixes
   SCCP/ipsccp-gvar.ll.

llvm-svn: 31106

llvm-svn: 31086

llvm-svn: 31073

but apparently didn't make it into the final patch.

llvm-svn: 31070

This patch implements the first increment for the Signless Types feature.
All changes pertain to removing the ConstantSInt and ConstantUInt classes
in favor of just using ConstantInt.

llvm-svn: 31063

llvm-svn: 31062

llvm-svn: 31061

and destination sign may not match but other conditions are met.

llvm-svn: 31056

llvm-svn: 31055