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54 Commits

Author SHA1 Message Date
Nick Lewycky
efb16f7057 Be more careful modifying the use_list while also iterating through it. 
llvm-svn: 46417
 2008-01-27 18:35:00 +00:00
Wojciech Matyjewicz
30e434569e fix typo 
llvm-svn: 45594
 2008-01-04 20:02:18 +00:00
Chris Lattner
f3ebc3f3d2 Remove attribution from file headers, per discussion on llvmdev. 
llvm-svn: 45418
 2007-12-29 20:36:04 +00:00
Owen Anderson
b0dd27ee91 Make LoopInfoBase more generic, in preparation for having MachineLoopInfo. This involves a small interface change. 
llvm-svn: 44348
 2007-11-27 03:43:35 +00:00
Devang Patel
b98d2050a2 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
 2007-11-05 19:32:30 +00:00
Chris Lattner
2740694450 wrap some long lines. Major offenders that are left include 
gvn, gvnpre, dse, and predsimplify.  To see these, use:

  make check-line-length

llvm-svn: 40738
 2007-08-02 16:53:43 +00:00
Dan Gohman
8d40e4d965 Correct a few comments. 
llvm-svn: 37034
 2007-05-14 14:31:17 +00:00
Dan Gohman
2980d9da45 This patch extends the LoopUnroll pass to be able to unroll loops 
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
 2007-05-11 20:53:41 +00:00
Dan Gohman
2e1f804764 Fix various whitespace inconsistencies. 
llvm-svn: 36936
 2007-05-08 15:19:19 +00:00
Dan Gohman
49d08a57f5 Correct the comment for ApproximateLoopSize to reflect what it actually does. 
llvm-svn: 36935
 2007-05-08 15:14:19 +00:00
Chris Lattner
1077d2a30d Fix Transforms/LoopUnroll/2007-05-05-UnrollMiscomp.ll and PR1385. 
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
 2007-05-05 18:49:57 +00:00
Chris Lattner
57d89a5a89 make a temporary for *SI, no functionality change. 
llvm-svn: 36782
 2007-05-05 18:36:36 +00:00
Devang Patel
8c78a0bff0 Drop 'const' 
llvm-svn: 36662
 2007-05-03 01:11:54 +00:00
Devang Patel
e95c6ad802 Use 'static const char' instead of 'static const int'. 
Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.

llvm-svn: 36652
 2007-05-02 21:39:20 +00:00
Devang Patel
09f162ca6a Do not use typeinfo to identify pass in pass manager. 
llvm-svn: 36632
 2007-05-01 21:15:47 +00:00
Devang Patel
abdff3fecd Fix 
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070416/047888.html

llvm-svn: 36182
 2007-04-16 23:03:45 +00:00
Devang Patel
9779e56c04 Now LoopUnroll is a LoopPass. 
llvm-svn: 34996
 2007-03-07 01:38:05 +00:00
Reid Spencer
29fe20a98b Guard against huge loop trip counts in an APInt safe way. 
llvm-svn: 34858
 2007-03-02 23:31:34 +00:00
Reid Spencer
557ab15e71 Apply the VISIBILITY_HIDDEN field to the remaining anonymous classes in 
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
 2007-02-05 23:32:05 +00:00
Chris Lattner
1bfc7ab6a7 Switch inliner over to use DenseMap instead of std::map for ValueMap. This 
speeds up the inliner 16%.

llvm-svn: 33801
 2007-02-03 00:08:31 +00:00
Chris Lattner
024f4ab383 Adjust #includes to match movement of constant folding code from transformutils to libanalysis. 
llvm-svn: 33680
 2007-01-30 23:46:24 +00:00
Chris Lattner
79a42ac941 Switch over Transforms/Scalar to use the STATISTIC macro. For each statistic 
converted, we lose a static initializer.  This also allows GCC to emit warnings
about unused statistics.

llvm-svn: 32690
 2006-12-19 21:40:18 +00:00
Chris Lattner
700b873130 Detemplatize the Statistic class. The only type it is instantiated with 
is 'unsigned'.

llvm-svn: 32279
 2006-12-06 17:46:33 +00:00
Bill Wendling
5dbf43c983 Removed #include <iostream> and replaced with llvm_* streams. 
llvm-svn: 31923
 2006-11-26 09:46:52 +00:00
Reid Spencer
de46e48420 For PR786: 
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
 2006-11-02 20:25:50 +00:00
Reid Spencer
e0fc4dfc22 For PR950: 
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
 2006-10-20 07:07:24 +00:00
Owen Anderson
a8a2e5c666 Clean up a bit. 
llvm-svn: 29950
 2006-08-29 06:10:56 +00:00
Owen Anderson
62c84fe371 Make LoopUnroll fold excessive BasicBlocks. This results in a significant speedup of 
gccas on 252.eon

llvm-svn: 29936
 2006-08-28 02:09:46 +00:00
Chris Lattner
c2d3d3112e eliminate RegisterOpt. It does the same thing as RegisterPass. 
llvm-svn: 29925
 2006-08-27 22:42:52 +00:00
Owen Anderson
403b95af47 Fix a crash related to updating Phi nodes in the original header block. This was 
causing a crash in 175.vpr

llvm-svn: 29887
 2006-08-25 22:13:55 +00:00
Owen Anderson
e001d811ba Implement unrolling of multiblock loops. This significantly improves the 
utility of the LoopUnroll pass.

Also, add a testcase for multiblock-loop unrolling.

llvm-svn: 29859
 2006-08-24 21:28:19 +00:00
Chris Lattner
1b928478aa Minor comment tweaks 
llvm-svn: 29226
 2006-07-20 19:06:16 +00:00
Owen Anderson
8ef4c92ef8 Add an assertion. 
llvm-svn: 29199
 2006-07-19 05:48:45 +00:00
Owen Anderson
aba8c199dd Make LoopUnroll not die on LCSSA Phis. This makes lencod work again. 
llvm-svn: 29198
 2006-07-19 05:45:14 +00:00
Reid Spencer
d4b795902c Fix a spello in a comment. 
llvm-svn: 28714
 2006-06-07 21:24:10 +00:00
Chris Lattner
c597b8a55e Make iostream #inclusion explicit 
llvm-svn: 25514
 2006-01-22 23:32:06 +00:00
Jeff Cohen
82639853c0 Eliminate tabs and trailing spaces 
llvm-svn: 21480
 2005-04-23 21:38:35 +00:00
Misha Brukman
b1c9317bb4 Remove trailing whitespace 
llvm-svn: 21427
 2005-04-21 23:48:37 +00:00
Chris Lattner
238f6df546 Fix a bug where we could corrupt a parent loop's header info if we unrolled 
a nested loop.  This fixes Transforms/LoopUnroll/2005-03-06-BadLoopInfoUpdate.ll
and PR532

llvm-svn: 20493
 2005-03-06 20:57:32 +00:00
Chris Lattner
47f395cd85 Silence VS warnings. 
llvm-svn: 19380
 2005-01-08 19:37:20 +00:00
Chris Lattner
6d048a0d32 Do not consider debug intrinsics in the size computations for loop unrolling. 
Patch contributed by Michael McCracken!

llvm-svn: 18108
 2004-11-22 17:18:36 +00:00
Reid Spencer
ce0783318b Correction to allow compilation with Visual C++. 
Patch contributed by Morten Ofstad. Thanks Morten!

llvm-svn: 17123
 2004-10-18 14:38:48 +00:00
Reid Spencer
6614946443 Convert code to compile with vc7.1. 
Patch contributed by Paolo Invernizzi. Thanks Paolo!

llvm-svn: 16368
 2004-09-15 17:06:42 +00:00
Reid Spencer
7c16caa336 Changes For Bug 352 
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
 2004-09-01 22:55:40 +00:00
Chris Lattner
c12c945cc4 Fix a nasty bug that caused us to unroll EXTREMELY large loops due to overflow 
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
 2004-05-13 20:43:31 +00:00
Chris Lattner
c1aa21f5a7 Fix PR325 
llvm-svn: 13081
 2004-04-20 20:26:03 +00:00
Chris Lattner
bc02177fdc Add #include 
llvm-svn: 13057
 2004-04-19 03:01:23 +00:00
Chris Lattner
d72c3eb54e Change the ExitBlocks list from being explicitly contained in the Loop 
structure to being dynamically computed on demand.  This makes updating
loop information MUCH easier.

llvm-svn: 13045
 2004-04-18 22:14:10 +00:00
Chris Lattner
d15250240c Reduce the unrolling limit 
llvm-svn: 13040
 2004-04-18 18:06:14 +00:00
Chris Lattner
30ae18155d If the preheader of the loop was the entry block of the function, make sure 
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
 2004-04-18 17:38:42 +00:00