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: 29950

gccas on 252.eon

llvm-svn: 29936

llvm-svn: 29925

causing a crash in 175.vpr

llvm-svn: 29887

utility of the LoopUnroll pass.

Also, add a testcase for multiblock-loop unrolling.

llvm-svn: 29859

llvm-svn: 29226

llvm-svn: 29199

llvm-svn: 29198

llvm-svn: 28714

llvm-svn: 25514

llvm-svn: 21480

llvm-svn: 21427

a nested loop.  This fixes Transforms/LoopUnroll/2005-03-06-BadLoopInfoUpdate.ll
and PR532

llvm-svn: 20493

llvm-svn: 19380

Patch contributed by Michael McCracken!

llvm-svn: 18108

Patch contributed by Morten Ofstad. Thanks Morten!

llvm-svn: 17123

Patch contributed by Paolo Invernizzi. Thanks Paolo!

llvm-svn: 16368

Move include/Config and include/Support into include/llvm/Config,
include/llvm/ADT and include/llvm/Support. From here on out, all LLVM
public header files must be under include/llvm/.

llvm-svn: 16137

in the size calculation.

This is not something you want to see:
Loop Unroll: F[main] Loop %no_exit Loop Size = 2 Trip Count = 2147483648 - UNROLLING!

The problem was that 2*2147483648 == 0.

Now we get:
Loop Unroll: F[main] Loop %no_exit Loop Size = 2 Trip Count = 2147483648 - TOO LARGE: 4294967296>100

Thanks to some anonymous person playing with the demo page that repeatedly
caused zion to go into swapping land.  That's one way to ensure you'll get
a quick bugfix.  :)

Testcase here: Transforms/LoopUnroll/2004-05-13-DontUnrollTooMuch.ll

llvm-svn: 13564

llvm-svn: 13081

llvm-svn: 13057

structure to being dynamically computed on demand.  This makes updating
loop information MUCH easier.

llvm-svn: 13045

llvm-svn: 13040

that the exit block of the loop becomes the new entry block of the function.

This was causing a verifier assertion on 252.eon.

llvm-svn: 13039

using instructions inside of the loop.  This should fix the MishaTest failure
from last night.

llvm-svn: 13038

block.  The primary motivation for doing this is that we can now unroll nested loops.

This makes a pretty big difference in some cases.  For example, in 183.equake,
we are now beating the native compiler with the CBE, and we are a lot closer
with LLC.

I'm now going to play around a bit with the unroll factor and see what effect
it really has.

llvm-svn: 13034

While we're at it, add support for updating loop information correctly.

llvm-svn: 13033

limited.  Even in it's extremely simple state (it can only *fully* unroll single
basic block loops that execute a constant number of times), it already helps improve
performance a LOT on some benchmarks, particularly with the native code generators.

llvm-svn: 13028