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155 Commits

Author SHA1 Message Date
Dan Gohman
8b6f4366ae Tidy up BasicBlock::getFirstNonPHI, and change a bunch of places to 
use it instead of duplicating its functionality.

llvm-svn: 51499
 2008-05-23 21:05:58 +00:00
Dan Gohman
bab18cae46 Clean up the use of static and anonymous namespaces. This turned up 
several things that were neither in an anonymous namespace nor static
but not intended to be global.

llvm-svn: 51017
 2008-05-13 00:00:25 +00:00
Dan Gohman
d4a670284c Make several variable declarations static. 
llvm-svn: 50696
 2008-05-06 01:53:16 +00:00
Nick Lewycky
1f831c0f57 Remove 'unwinds to' support from mainline. This patch undoes r47802 r47989 
r48047 r48084 r48085 r48086 r48088 r48096 r48099 r48109 and r48123.

llvm-svn: 50265
 2008-04-25 16:53:59 +00:00
Chris Lattner
34894abd7f fit some more code in 80 cols. 
llvm-svn: 50016
 2008-04-21 00:25:49 +00:00
Gabor Greif
6c6b8a57f3 API changes for class Use size reduction, wave 1. 
Specifically, introduction of XXX::Create methods
for Users that have a potentially variable number of
Uses.

llvm-svn: 49277
 2008-04-06 20:25:17 +00:00
Nick Lewycky
50c8d20ca2 Update the block cloner which fixes bugpoint on code using unwind_to (phew!) 
and also update the cloning interface's major user, the loop optimizations.

llvm-svn: 48088
 2008-03-09 05:24:34 +00:00
Chris Lattner
ad9a6ccb83 Remove attribution from file headers, per discussion on llvmdev. 
llvm-svn: 45418
 2007-12-29 20:36:04 +00:00
David Greene
3f3a521a33 Get rid of annoying spaces. 
llvm-svn: 45100
 2007-12-17 17:40:29 +00:00
Owen Anderson
43d4a82d4b 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
b13057acf6 Do not walk invalid iterator. 
llvm-svn: 42812
 2007-10-09 21:31:36 +00:00
Devang Patel
36b68478cb Fix bug in updating dominance frontier after loop 
unswitch when frontier includes basic blocks that 
are not inside loop.

llvm-svn: 42654
 2007-10-05 22:29:34 +00:00
Devang Patel
5efcf79cf3 Fix 80 col violation. 
llvm-svn: 42591
 2007-10-03 21:17:43 +00:00
Devang Patel
1e2cced8b9 Refactor code in a separate method. 
llvm-svn: 42590
 2007-10-03 21:16:08 +00:00
Devang Patel
632653ce8f Update aux. info associated with an instruction before erasing instruction. 
llvm-svn: 42180
 2007-09-20 23:45:50 +00:00
Devang Patel
f06e667e9c Use SmallVector instead of std::vector. 
llvm-svn: 41207
 2007-08-21 00:31:24 +00:00
David Greene
7eea029403 Fix GLIBCXX_DEBUG error triggered by incrementing erased iterator. 
llvm-svn: 40897
 2007-08-07 16:44:38 +00:00
Chris Lattner
25a8bfdedb 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
Devang Patel
937b07fb5e Update dominator info for the middle blocks created while spliting 
exit edge to preserve LCSSA.

Fix dominance frontier update during loop unswitch. This fixes PR 1589, again

llvm-svn: 40737
 2007-08-02 15:25:57 +00:00
Devang Patel
f21f509c2c Undo previous check-in. 
llvm-svn: 40698
 2007-08-01 23:24:50 +00:00
Devang Patel
51c61e730a Update dominator info for the middle blocks created while spliting 
exit edge to preserve LCSSA.

Fix dominance frontier update during loop unswitch. This fixes PR 1589.

llvm-svn: 40695
 2007-08-01 22:23:50 +00:00
Dan Gohman
7dd04fb91c More explicit keywords. 
llvm-svn: 40673
 2007-08-01 15:32:29 +00:00
Devang Patel
84e123116e Loop unswitch preserves dom info. 
Use simple analysis interface to preserve analysis info maintained by other loop passes.

llvm-svn: 40627
 2007-07-31 08:03:26 +00:00
Devang Patel
069a8d9716 If loop can be unswitched again, then do it yourself. 
llvm-svn: 40609
 2007-07-30 23:07:10 +00:00
Devang Patel
81c015b472 Remove dead code. 
llvm-svn: 40606
 2007-07-30 21:10:44 +00:00
Chuck Rose III
4a3a018844 VStudio compiler errors and placing Function*->ExFunc map under ManagedStatic control. 
This commit fixes two things.  One is a pair of VStudio compiler errors stemming from variables
which defined within the for loop statement and also within the body of the for loop.  I fixed these 
by renaming one of the two variables.  Additionally, I've made the Function*->ExFunc map in 
ExternalFunctions.cpp a ManagedStatic object, so that cleanup will be done on llvm_shutdown.  In repeated
uses of the interpreter, where the same Function* address may get used for completely differnet functions,
this was causing a crash.

llvm-svn: 40558
 2007-07-27 18:26:35 +00:00
Devang Patel
ef7c515e9a Fix typo. 
llvm-svn: 40025
 2007-07-18 23:50:19 +00:00
Devang Patel
b5482a65c9 Fix dominator info update to accommodate CFG changes. 
This fixes PR1559.

llvm-svn: 40024
 2007-07-18 23:48:20 +00:00
Devang Patel
cfdf3b6eff Disable claims to preserve analysis until open issues are resolved. 
llvm-svn: 39834
 2007-07-13 21:53:42 +00:00
Devang Patel
91939a6a55 These rountines are now available as part of basic block utilities. 
llvm-svn: 37955
 2007-07-06 22:03:47 +00:00
Devang Patel
2a1af2196d Preserve DominanceFrontier. 
llvm-svn: 37820
 2007-06-29 23:11:49 +00:00
Devang Patel
8292a2ee90 Do not filter loop if candidate branch is in loop header. 
llvm-svn: 37792
 2007-06-29 01:39:53 +00:00
Devang Patel
03d844eebd - Undo previous check and allow loop switch for condtion that is not inside 
loop.
- Avoid loop unswich for loop header branch.
- While cloning dominators fix typo and handle self dominating blocks.

llvm-svn: 37772
 2007-06-28 02:05:46 +00:00
Devang Patel
7f468af921 Update LoopUnswitch pass to preserve DomiantorTree. 
llvm-svn: 37771
 2007-06-28 00:49:00 +00:00
Devang Patel
50d5420cdc If a condition is not inside a loop then the condition is suitable 
to loop unswitch candidate for the loop.

llvm-svn: 37770
 2007-06-28 00:44:10 +00:00
Devang Patel
61661c6774 Avoid non-trivial loop unswitching while optimizing for size. 
llvm-svn: 37446
 2007-06-06 00:21:03 +00:00
Devang Patel
1f12d0b50c Fix PR1333 
Testcases :
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070507/049451.html
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070507/049452.html

llvm-svn: 36955
 2007-05-09 08:24:12 +00:00
Devang Patel
cd45427a87 Drop 'const' 
llvm-svn: 36662
 2007-05-03 01:11:54 +00:00
Devang Patel
8ee9065162 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
38a66bc82e Do not use typeinfo to identify pass in pass manager. 
llvm-svn: 36632
 2007-05-01 21:15:47 +00:00
Devang Patel
c35610b9f9 Now LoopUnswitch is a LoopPass. 
llvm-svn: 34992
 2007-03-07 00:26:10 +00:00
Reid Spencer
70fbfc75e8 Use more efficient test for one value in a ConstantInt. 
llvm-svn: 34859
 2007-03-02 23:35:28 +00:00
Devang Patel
c13055b251 Use efficient container SmallPtrSet 
llvm-svn: 34640
 2007-02-26 20:22:50 +00:00
Devang Patel
b0b949f93e Do not unswitch loop on same value again and again. 
llvm-svn: 34638
 2007-02-26 19:31:58 +00:00
Reid Spencer
8749d297f5 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
71fe09f397 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
7db51ec161 Adjust #includes to match movement of constant folding code from transformutils to libanalysis. 
llvm-svn: 33680
 2007-01-30 23:46:24 +00:00
Reid Spencer
14b42c0040 For PR1043: 
This is the final patch for this PR. It implements some minor cleanup
in the use of IntegerType, to wit:
1. Type::getIntegerTypeMask -> IntegerType::getBitMask
2. Type::Int*Ty changed to IntegerType* from Type*
3. ConstantInt::getType() returns IntegerType* now, not Type*

This also fixes PR1120.

Patch by Sheng Zhou.

llvm-svn: 33370
 2007-01-19 21:13:56 +00:00
Chris Lattner
ec0b2f5e29 fix a bug in a recent patch 
llvm-svn: 33164
 2007-01-13 00:02:49 +00:00
Reid Spencer
3d986f6487 Implement review feedback for the ConstantBool->ConstantInt merge. Chris 
recommended that getBoolValue be replaced with getZExtValue and that
get(bool) be replaced by get(const Type*, uint64_t). This implements
those changes.

llvm-svn: 33110
 2007-01-12 04:24:46 +00:00
Reid Spencer
f3265181e2 Rename BoolTy as Int1Ty. Patch by Sheng Zhou. 
llvm-svn: 33076
 2007-01-11 18:21:29 +00:00
Zhou Sheng
23d24526b2 For PR1043: 
Merge ConstantIntegral and ConstantBool into ConstantInt.
Remove ConstantIntegral and ConstantBool from LLVM.

llvm-svn: 33073
 2007-01-11 12:24:14 +00:00
Reid Spencer
4428c3483b For PR950: 
This patch removes the SetCC instructions and replaces them with the ICmp
and FCmp instructions. The SetCondInst instruction has been removed and
been replaced with ICmpInst and FCmpInst.

llvm-svn: 32751
 2006-12-23 06:05:41 +00:00
Chris Lattner
9e7640cf02 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
a531ce882e 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
1b3a86000a Removed #include <iostream> and replaced with llvm_* streams. 
llvm-svn: 31923
 2006-11-26 09:46:52 +00:00
Reid Spencer
4bafa71dc1 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
Chris Lattner
168061f13d Eliminate ConstantBool::True and ConstantBool::False. Instead, provide 
ConstantBool::getTrue() and ConstantBool::getFalse().

llvm-svn: 30665
 2006-09-28 23:35:22 +00:00
Devang Patel
a5bb9b49d3 Do not rely on std::sort and std::erase to get list of unique 
exit blocks. The output is dependent on addresses of basic block.

Add and use Loop::getUniqueExitBlocks.

llvm-svn: 29966
 2006-08-29 22:29:16 +00:00
Chris Lattner
a39dcb5377 eliminate RegisterOpt. It does the same thing as RegisterPass. 
llvm-svn: 29925
 2006-08-27 22:42:52 +00:00
Owen Anderson
8a36136176 Fix a error that hadn't yet cause any problems, but I'm sure it would have 
somewhere down the road.

llvm-svn: 29197
 2006-07-19 03:51:48 +00:00
Owen Anderson
8f95262124 Switch to a very conservative heuristic for determining when loop-unswitching 
will be profitable.  This is mainly to remove some cases where excessive
unswitching would result in long compile times and/or huge generated code.

Once someone comes up with a better heuristic that avoids these cases, this
should be switched out.

llvm-svn: 28962
 2006-06-28 17:47:50 +00:00
Chris Lattner
1d8a141786 Don't unswitch really large loops even if they are mostly filled with empty 
blocks.

llvm-svn: 28959
 2006-06-28 16:38:55 +00:00
Owen Anderson
f9dbb7c834 Fix for 2006-06-27-DeadSwitchCase.ll 
Be more careful when updating Phi nodes after eliminating dead switch cases.  Fix
proposed by Chris.

llvm-svn: 28947
 2006-06-27 22:26:09 +00:00
Owen Anderson
71056f7113 Make LoopUnswitch able to unswitch loops with live-out values by taking advantage 
of LCSSA.  This results several times the number of unswitchings occurring on
tests such and timberwolfmc, unix-tbl, and ldecod.

llvm-svn: 28912
 2006-06-26 07:44:36 +00:00
Chris Lattner
68a0b5c8a0 Fix Transforms/LoopUnswitch/2006-06-13-SingleEntryPHI.ll, a loop unswitch 
bug exposed by the recent lcssa work.

llvm-svn: 28779
 2006-06-14 04:46:17 +00:00
Owen Anderson
276e728e4b Reapply my 6/9 changes. The bug Evan saw no longer occurs. 
llvm-svn: 28759
 2006-06-12 21:49:21 +00:00
Evan Cheng
d99c8e2e5f Back out Owen's 6/9 changes. They broke MultiSource/Benchmarks/Prolangs-C/bison (and perhaps others). 
llvm-svn: 28747
 2006-06-11 09:32:57 +00:00
Owen Anderson
4a0ceb1e6d Add LCSSA as a requirement for LoopUnswitch, and assert that LoopUnswitch preserves 
LCSSA.

llvm-svn: 28739
 2006-06-09 18:40:32 +00:00
Chris Lattner
37951daad5 add the actual cost to the debug info 
llvm-svn: 27051
 2006-03-24 07:14:00 +00:00
Chris Lattner
fafc1f9c51 Fix Regression/Transforms/LoopUnswitch/2006-02-22-UnswitchCrash.ll, which 
caused SPASS to fail building last night.

We can't trivially unswitch a loop if the exit block has phi nodes in it,
because we don't know which predecessor to use.

llvm-svn: 26320
 2006-02-22 23:55:00 +00:00
Chris Lattner
b539c70e07 Add some comments, simplify some code, and fix a bug that caused rewriting 
to rewrite with the wrong value.

llvm-svn: 26311
 2006-02-22 06:37:14 +00:00
Chris Lattner
4121b502d3 improved support for branch folding, still not enabled. 
llvm-svn: 26289
 2006-02-18 07:57:38 +00:00
Chris Lattner
71d62c944d Implement deletion of dead blocks, currently disabled. 
llvm-svn: 26285
 2006-02-18 02:42:34 +00:00
Chris Lattner
5f12d7c418 a previous patch completely disabled trivial unswitching, this fixees it. 
Thanks to nate for pointing this out :)

llvm-svn: 26280
 2006-02-18 01:32:04 +00:00
Chris Lattner
359476b89f initial trivial support for folding branches that have now-constant destinations. 
llvm-svn: 26279
 2006-02-18 01:27:45 +00:00
Chris Lattner
39356756ac When unswitching a loop, make sure to update loop info with exit blocks in 
the right loop.

llvm-svn: 26277
 2006-02-18 00:55:32 +00:00
Chris Lattner
d5a4da466a Fix loops where the header has an exit, fixing a loop-unswitch crash on crafty 
llvm-svn: 26258
 2006-02-17 06:39:56 +00:00
Chris Lattner
e2286db8d8 start of some new simplification code, not thoroughly tested, use at your own 
risk :)

llvm-svn: 26248
 2006-02-17 00:31:07 +00:00
Chris Lattner
847c7ca438 Change SplitBlock to increment a BasicBlock::iterator, not an Instruction*. Apparently they do different things :) 
This fixes a testcase that nate reduced from spass.

Also included are a couple minor code changes that don't affect the generated
code at all.

llvm-svn: 26235
 2006-02-16 19:36:22 +00:00
Jeff Cohen
381e19a745 Fix VC++ warning. 
llvm-svn: 26228
 2006-02-16 04:07:37 +00:00
Chris Lattner
57142c7e12 fix a bug where we unswitched the wrong way 
llvm-svn: 26225
 2006-02-16 01:24:41 +00:00
Chris Lattner
0a6283e1c2 Implement trivial unswitching for switch stmts. This allows us to trivial 
unswitch this loop on 2 before sweating to unswitch on 1/3.

void test4(int N, int i, int C, int*P, int*Q) {
  int j;
  for (j = 0; j < N; ++j) {
    switch (C) {                // general unswitching.
    default: P[i+j] = 0; break;
    case 1: Q[i+j] = 0; break;
    case 3: P[i+j] = Q[i+j]; break;
    case 2: break;              //  TRIVIAL UNSWITCH on C==2
    }
  }
}

llvm-svn: 26223
 2006-02-15 22:52:05 +00:00
Chris Lattner
4b996ebd5e make "trivial" unswitching significantly more general. It can now handle 
this for example:

  for (j = 0; j < N; ++j) {     // trivial unswitch
    if (C)
      P[i+j] = 0;
  }

turning it into the obvious code without bothering to duplicate an empty loop.

llvm-svn: 26220
 2006-02-15 22:03:36 +00:00
Chris Lattner
9268890212 Checking the wrong value. This caused us to emit silly code like 
Y = seteq bool X, true
instead of just using X :)

llvm-svn: 26215
 2006-02-15 19:05:52 +00:00
Chris Lattner
a71a9897e0 more refactoring, no functionality change. 
llvm-svn: 26194
 2006-02-15 01:44:42 +00:00
Chris Lattner
456e164ccb pull some code out into a function 
llvm-svn: 26191
 2006-02-15 00:07:43 +00:00
Chris Lattner
33fd4611f5 Use statistics to keep track of what flavors of loops we are unswitching 
llvm-svn: 26157
 2006-02-14 01:01:41 +00:00
Chris Lattner
f7cf05d3a2 implement unswitching of loops with switch stmts and selects in them 
llvm-svn: 26114
 2006-02-11 00:43:37 +00:00
Chris Lattner
ec24272c6f Update PHI nodes in successors of exit blocks. 
llvm-svn: 26113
 2006-02-10 23:26:14 +00:00
Chris Lattner
672c45a3c0 Reform the unswitching code in terms of edge splitting, not block splitting. 
llvm-svn: 26112
 2006-02-10 23:16:39 +00:00
Chris Lattner
ada27b9dba Fix a case where UnswitchTrivialCondition broke critical edges with 
phi's in the successors

llvm-svn: 26108
 2006-02-10 19:08:15 +00:00
Chris Lattner
8d28872523 add some notes, move some code around. Implement unswitching of loops 
with branches on partially invariant computations.

llvm-svn: 26104
 2006-02-10 02:30:37 +00:00
Chris Lattner
e51f996026 Move code around to be more logical, no functionality change. 
llvm-svn: 26103
 2006-02-10 02:01:22 +00:00
Chris Lattner
4432cd73f2 When unswitching a trivial loop, do admit we are doing it! :) 
llvm-svn: 26102
 2006-02-10 01:36:35 +00:00
Chris Lattner
eef362d63e Implement unconditional unswitching of 'trivial' loops, those loops that contain 
branches in their entry block that control whether or not the loop is a noop or not.

llvm-svn: 26101
 2006-02-10 01:24:09 +00:00
Chris Lattner
602fc20596 Simplify control flow a bit, note that unswitch preserves canonical loop form 
llvm-svn: 26098
 2006-02-09 22:15:42 +00:00
Chris Lattner
19acace8c0 Make the threshold a parameter 
llvm-svn: 26093
 2006-02-09 20:15:48 +00:00
Chris Lattner
4ae405113a Simplify the loop-unswitch pass, by not even trying to unswitch loops with 
uses of loop values outside the loop.  We need loop-closed SSA form to do
this right, or to use SSA rewriting if we really care.

llvm-svn: 26089
 2006-02-09 19:14:52 +00:00
Chris Lattner
2588f0eb8f Make iostream #inclusion explicit 
llvm-svn: 25514
 2006-01-22 23:32:06 +00:00