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69 Commits

Author SHA1 Message Date
Dan Gohman
ffdcba3dbd Remove the block from the LoopInfo, rather than just the Loop. 
LoopInfo will handle removing it from the Loop, as well as updating
its own tables.

llvm-svn: 74398
 2009-06-27 22:32:36 +00:00
Dan Gohman
c8ca49659a Teach LoopSimplify how to merge multiple loop exits into a single exit, 
when one of them can be converted to a trivial icmp and conditional
branch.

This addresses what is essentially a phase ordering problem.
SimplifyCFG knows how to do this transformation, but it doesn't do so
if the primary block has any instructions in it other than an icmp and
a branch. In the given testcase, the block contains other instructions,
however they are loop-invariant and can be hoisted. SimplifyCFG doesn't
have LoopInfo though, so it can't hoist them. And, it's important that
the blocks be merged before LoopRotation, as it doesn't support
multiple-exit loops.

llvm-svn: 74396
 2009-06-27 21:30:38 +00:00
Duncan Sands
5a913d61e3 Rename getAnalysisToUpdate to getAnalysisIfAvailable. 
llvm-svn: 63198
 2009-01-28 13:14:17 +00:00
Dan Gohman
a79db30d28 Tidy up several unbeseeming casts from pointer to intptr_t. 
llvm-svn: 55779
 2008-09-04 17:05:41 +00:00
Dan Gohman
90071075e2 Use Loop::block_iterator. 
llvm-svn: 52616
 2008-06-22 20:18:58 +00:00
Devang Patel
8549e4ca07 LoopSimplify preserves AA. 
llvm-svn: 52053
 2008-06-06 17:50:58 +00:00
Dan Gohman
0479aa5c0b Change class' public PassInfo variables to by initialized with the 
address of the PassInfo directly instead of calling getPassInfo.
This eliminates a bunch of dynamic initializations of static data.

Also, fold RegisterPassBase into PassInfo, make a bunch of its
data members const, and rearrange some code to initialize data
members in constructors instead of using setter member functions.

llvm-svn: 51022
 2008-05-13 02:05:11 +00:00
Dan Gohman
d78c400b5b 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
Nick Lewycky
4d43d3c72c 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
a5b11705b6 Move SplitBlockPredecessors out of loopsimplify into BasicBlockUtils.h 
as a global helper function.  At the same type, switch it from taking
a vector of predecessors to an arbitrary sequential input.  This allows
us to switch LoopSimplify to use a SmallVector for various temporary
vectors that it passed into SplitBlockPredecessors.

llvm-svn: 50020
 2008-04-21 01:28:02 +00:00
Chris Lattner
d418b06abf Move domtree/frontier updating earlier, allowing us to use it to update phi 
nodes, removing a hack.

llvm-svn: 50019
 2008-04-21 01:05:08 +00:00
Chris Lattner
96e9e22269 Factor dominator tree and frontier updating into SplitBlockPredecessors 
instead of doing it after every call.

llvm-svn: 50018
 2008-04-21 00:54:38 +00:00
Chris Lattner
aca912d793 simplify code, fit in 80 cols. 
llvm-svn: 50015
 2008-04-21 00:23:14 +00:00
Gabor Greif
e9ecc68d8f 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
11fc6f8765 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
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
Chris Lattner
4a15e04aee Fix PR1752 and LoopSimplify/2007-10-28-InvokeCrash.ll: terminators 
can have uses too.  Wouldn't it be nice if invoke didn't exist? :)

llvm-svn: 43426
 2007-10-29 02:30:37 +00:00
Owen Anderson
ca831a829d Move Split<...>() into DomTreeBase. This should make the #include's of DominatorInternals.h 
in CodeExtractor and LoopSimplify unnecessary.

Hartmut, could you confirm that this fixes the issues you were seeing?

llvm-svn: 43115
 2007-10-18 05:13:52 +00:00
Hartmut Kaiser
2f842e613f Fixed linker errors (unresolved externals: split<>(...)) when compiling with VC++. Please review. 
llvm-svn: 43081
 2007-10-17 18:37:09 +00:00
Devang Patel
b5933bbbd5 Use SmallVector instead of std::vector. 
llvm-svn: 41207
 2007-08-21 00:31:24 +00:00
Chris Lattner
c7ba225705 remove some dead lines 
llvm-svn: 40859
 2007-08-06 06:21:06 +00:00
Devang Patel
a273d1cd3a Verify loop info. 
llvm-svn: 40062
 2007-07-19 18:02:32 +00:00
David Greene
1e2a12019f Fix reference to iterator invalidated by an erase operation. Uncovered 
by _GLIBCXX_DEBUG.

llvm-svn: 37796
 2007-06-29 02:53:16 +00:00
Devang Patel
d5258a23a5 Move code to update dominator information after basic block is split 
from LoopSimplify.cpp to Dominator.cpp

llvm-svn: 37689
 2007-06-21 17:23:45 +00:00
Devang Patel
78b9c68164 Add and use DominatorTreeBase::findNearestCommonDominator(). 
llvm-svn: 37545
 2007-06-11 23:31:22 +00:00
Devang Patel
536ac4dca7 Simplify. 
llvm-svn: 37542
 2007-06-11 21:45:31 +00:00
Devang Patel
d18054afcf simplify 
llvm-svn: 37541
 2007-06-11 21:25:31 +00:00
Devang Patel
ab2eee89a4 Simplify. Dominator Tree is required so always available. 
llvm-svn: 37540
 2007-06-11 21:18:00 +00:00
Devang Patel
becc466451 Update LoopSimplify to require and preserve DominatorTree only. 
Now LoopSimplify does not require nor preserve ETForest.

llvm-svn: 37512
 2007-06-08 01:50:32 +00:00
Devang Patel
ebc5b96735 s/DominatorTree::createNewNode/DominatorTree::addNewBlock/g 
llvm-svn: 37415
 2007-06-04 16:43:25 +00:00
Devang Patel
bdd1aaef10 s/llvm::DominatorTreeBase::DomTreeNode/llvm::DomTreeNode/g 
llvm-svn: 37407
 2007-06-04 00:32:22 +00:00
Devang Patel
0e8aa7b69a s/DominatorTreeBase::Node/DominatorTreeBase:DomTreeNode/g 
llvm-svn: 37403
 2007-06-03 06:26:14 +00:00
Nick Lewycky
e7da2d6ac3 Fix typo in comment. 
llvm-svn: 36873
 2007-05-06 13:37:16 +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
83a3adcc3f Avoid recursion. 
llvm-svn: 36272
 2007-04-20 20:04:37 +00:00
Owen Anderson
f35a1dbc7a Remove ImmediateDominator analysis. The same information can be obtained from DomTree. A lot of code for 
constructing ImmediateDominator is now folded into DomTree construction.

This is part of the ongoing work for PR217.

llvm-svn: 36063
 2007-04-15 08:47:27 +00:00
Owen Anderson
3c7867935e Re-constify things that don't break the build. Last patch in this 
series, I promise.

llvm-svn: 35848
 2007-04-09 23:38:18 +00:00
Owen Anderson
f1ca1376d3 Unconst-ify stuff that broke the build. 
llvm-svn: 35843
 2007-04-09 23:08:26 +00:00
Owen Anderson
5917716146 Const-ify some parameters, and some cosmetic cleanups. No functionality 
change.

llvm-svn: 35842
 2007-04-09 22:54:50 +00:00
Owen Anderson
e0ef5ac6bd Tabs -> Spaces 
llvm-svn: 35841
 2007-04-09 22:31:43 +00:00
Owen Anderson
83efbc84f7 Improve some _slow_ behavior introduced in my patches the last few days. 
llvm-svn: 35839
 2007-04-09 22:25:09 +00:00
Owen Anderson
ae39ca037a Cleanup some from my DomSet-removal changes. Add a new 
isReachableFromEntry
test to ETForest to factor a common test out of code.

llvm-svn: 35786
 2007-04-09 00:52:49 +00:00
Nick Lewycky
e6c64466c7 Remove DominatorSet usage from LoopSimplify. Patch from Owen Anderson. 
llvm-svn: 35757
 2007-04-08 01:04:30 +00:00
Owen Anderson
f7ebea1b9f Add DomSet back, and revert the changes to LoopSimplify. Apparently the 
ETForest updating mechanisms don't work as I thought they did.  These changes
will be reapplied once the issue is worked out.

llvm-svn: 35741
 2007-04-07 18:23:27 +00:00
Owen Anderson
706e97049d Completely purge DomSet from LoopSimplify. This is part of the 
continuing work on PR1171.

llvm-svn: 35730
 2007-04-07 06:56:47 +00:00
Owen Anderson
910419596e Expunge a bunch of uses of DomSet from LoopSimplify. Many more remain. 
This is the beginning of work for PR1171.

llvm-svn: 35720
 2007-04-07 04:37:14 +00:00
Devang Patel
1758cb50de LoopSimplify::FindPHIToPartitionLoops() 
Use ETForest instead of DominatorSet.

llvm-svn: 35221
 2007-03-20 20:18:12 +00:00