partially unroll a loop when fully unrolling would not fit under the threshold.

Patch by Mikael Lepistö.

llvm-svn: 54160

llvm-svn: 53089

llvm-svn: 52616

included after local headers.

llvm-svn: 51187

compiling with gcc 4.3.

llvm-svn: 51145

Patch by Matthijs Kooijman!

llvm-svn: 51083

several things that were neither in an anonymous namespace nor static
but not intended to be global.

llvm-svn: 51017

llvm-svn: 50696

r48047 r48084 r48085 r48086 r48088 r48096 r48099 r48109 and r48123.

llvm-svn: 50265

llvm-svn: 49657

which is significantly more efficient.

llvm-svn: 49614

llvm-svn: 48567

llvm-svn: 48474

and also update the cloning interface's major user, the loop optimizations.

llvm-svn: 48088

llvm-svn: 47367

llvm-svn: 46417

llvm-svn: 45594

llvm-svn: 45418

Make LoopInfoBase more generic, in preparation for having MachineLoopInfo.  This involves a small interface change.

llvm-svn: 44348

If a value is incoming from outside the loop then the value does not need remapping and the value is never tracked through  LastValueMap.

llvm-svn: 43728

gvn, gvnpre, dse, and predsimplify.  To see these, use:

  make check-line-length

llvm-svn: 40738

llvm-svn: 37034

with unknown trip counts. This is left off by default, and a
command-line option enables it. It also begins to separate loop
unrolling into a utility routine; eventually it might be made usable
from other passes.

It currently works by inserting conditional branches between each
unrolled iteration, unless it proves that the trip count is a
multiple of a constant integer > 1, which it currently only does in
the rare case that the trip count expression is a Mul operator with
a ConstantInt operand. Eventually this information might be provided
by other sources, for example by a pass that peels/splits the loop
for this purpose.

llvm-svn: 36990

llvm-svn: 36936

llvm-svn: 36935

If we have a LCSSA, only modify the input value if the inval was defined
by an instruction in the loop.  If defined by something before the loop,
it is still valid.

llvm-svn: 36784

llvm-svn: 36782

llvm-svn: 36662

Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.

llvm-svn: 36652

llvm-svn: 36632

Fix
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070416/047888.html

llvm-svn: 36182

llvm-svn: 34996

llvm-svn: 34858

the Transforms library. This reduces debug library size by 132 KB, debug
binary size by 376 KB, and reduces link time for llvm tools slightly.

llvm-svn: 33939

speeds up the inliner 16%.

llvm-svn: 33801

llvm-svn: 33680

converted, we lose a static initializer.  This also allows GCC to emit warnings
about unused statistics.

llvm-svn: 32690

is 'unsigned'.

llvm-svn: 32279

llvm-svn: 31923

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