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158 Commits

Author SHA1 Message Date
Owen Anderson
f2fea95f2f Reapply r110396, with fixes to appease the Linux buildbot gods. 
llvm-svn: 110460
 2010-08-06 18:33:48 +00:00
Owen Anderson
aadd8a89ca Revert r110396 to fix buildbots. 
llvm-svn: 110410
 2010-08-06 00:23:35 +00:00
Owen Anderson
b9762c07cb Don't use PassInfo* as a type identifier for passes. Instead, use the address of the static 
ID member as the sole unique type identifier.  Clean up APIs related to this change.

llvm-svn: 110396
 2010-08-05 23:42:04 +00:00
Dan Gohman
e6e38c1685 Eliminate getCanonicalInductionVariableIncrement's last user and 
eliminate it.

llvm-svn: 109270
 2010-07-23 21:34:51 +00:00
Jakob Stoklund Olesen
dcf78c06f8 Implement loop splitting analysis. 
Determine which loop exit blocks need a 'pre-exit' block inserted.
Recognize when this would be impossible.

llvm-svn: 108941
 2010-07-20 21:46:58 +00:00
Lang Hames
ac3a879f12 Switched to array_pod_sort as per Chris's suggestion. 
llvm-svn: 108616
 2010-07-17 09:21:53 +00:00
Lang Hames
48638f63ba LoopSplitter - intended to split live intervals over loop boundaries. 
Still very much under development. Comments and fixes will be forthcoming.

(This commit includes some small tweaks to LiveIntervals & LoopInfo to support the splitter)

llvm-svn: 108615
 2010-07-17 07:34:01 +00:00
Gabor Greif
17ddf2d1fa two more cases of reuse result of operator*, found by inspection 
llvm-svn: 107961
 2010-07-09 10:42:13 +00:00
Gabor Greif
01db29c828 another case of reuse result of operator*, it is expensive to recompute 
llvm-svn: 107960
 2010-07-09 10:32:31 +00:00
Gabor Greif
d266b0fcd8 reuse result of operator*, it is expensive to recompute 
llvm-svn: 107959
 2010-07-09 09:50:51 +00:00
Dan Gohman
29b845f3b7 Split out the code for finding a unique loop predecessor from 
getLoopPreheader into a separate function, for clients which don't
require a proper preheader.

llvm-svn: 106543
 2010-06-22 15:25:42 +00:00
Dan Gohman
07eb9cb4c2 Add a DominatorTree argument to isLCSSA so that it doesn't have to 
compute a set of reachable blocks for itself each time it is called, which
is fairly frequently.

llvm-svn: 98179
 2010-03-10 19:38:49 +00:00
Dan Gohman
7804dbce6e Rename a variable to avoid a -Wshadow warning. 
llvm-svn: 96776
 2010-02-22 04:04:24 +00:00
Dan Gohman
4346bb14f7 Mention IndVarSimplify in the comment by getSmallConstantTripCount, as 
is done for getTripCount.

llvm-svn: 95666
 2010-02-09 17:00:40 +00:00
Dan Gohman
b4e120e7a7 Restore dump() methods to Loop and MachineLoop. 
llvm-svn: 92772
 2010-01-05 21:08:02 +00:00
David Greene
1b160211dd Remove dump routine and the associated Debug.h from a header. Patch up 
other files to compensate.

llvm-svn: 92075
 2009-12-23 22:58:38 +00:00
David Greene
846ed71489 Convert debug messages to use dbgs(). Generally this means 
s/errs/dbgs/g except for certain special cases.

llvm-svn: 92006
 2009-12-23 17:24:22 +00:00
Dan Gohman
0f8f7f179d Add Loop contains utility methods for testing whether a loop 
contains another loop, or an instruction. The loop form is
substantially more efficient on large loops than the typical
code it replaces.

llvm-svn: 91654
 2009-12-18 01:24:09 +00:00
Dan Gohman
c483bed5e8 Reapply LoopStrengthReduce and IVUsers cleanups, excluding the part 
of 91296 that caused trouble -- the Processed list needs to be
preserved for the livetime of the pass, as AddUsersIfInteresting
is called from other passes.

llvm-svn: 91641
 2009-12-18 00:06:20 +00:00
Evan Cheng
18e334195d Revert 91280-91283, 91286-91289, 91291, 91293, 91295-91296. It apparently introduced a non-deterministic behavior in the optimizer somewhere. 
llvm-svn: 91598
 2009-12-17 09:39:49 +00:00
Dan Gohman
c6a7652b5e Drop Loop::isNotAlreadyContainedIn in favor of Loop::contains. The 
former was just exposing a LoopInfoBase implementation detail.

llvm-svn: 91286
 2009-12-14 17:06:50 +00:00
Dan Gohman
c22d542754 Make getUniqueExitBlocks's precondition assert more precise, to 
avoid spurious failures. This fixes PR5758.

llvm-svn: 91147
 2009-12-11 20:05:23 +00:00
Dan Gohman
d115107ef2 Make Loop::getLoopLatch() work on loops which don't have preheaders, as 
it may be used in contexts where preheader insertion may have failed due
to an indirectbr.

Make LoopSimplify's LoopSimplify::SeparateNestedLoop properly fail in
the case that it would require splitting an indirectbr edge.

These fix PR5502.

llvm-svn: 89484
 2009-11-20 20:51:18 +00:00
Dan Gohman
141625abc4 Fix an 80-column violation. 
llvm-svn: 86567
 2009-11-09 18:20:38 +00:00
Dan Gohman
6f6862e558 Factor out the predicate code for loopsimplify form exit blocks into 
a separate helper function.

llvm-svn: 86159
 2009-11-05 19:21:41 +00:00
Dan Gohman
1e96c6acaf Rename isLoopExit to isLoopExiting, for consistency with the wording 
used elsewhere - an exit block is a block outside the loop branched to
from within the loop. An exiting block is a block inside the loop that
branches out.

llvm-svn: 85019
 2009-10-24 23:34:26 +00:00
Dan Gohman
89b2635c5c Remove a redundant assert. 
llvm-svn: 82907
 2009-09-27 17:48:37 +00:00
Dan Gohman
2351c2f8b7 Add a comment describing natural loops. 
llvm-svn: 82859
 2009-09-26 15:09:53 +00:00
Dan Gohman
4e86738fa7 Fix apostrophos. 
llvm-svn: 81856
 2009-09-15 15:08:33 +00:00
Dan Gohman
cdaa08e706 Re-apply r80926, with fixes: keep the domtree informed of new blocks 
that get created during loop unswitching, and fix SplitBlockPredecessors'
LCSSA updating code to create new PHIs instead of trying to just move
existing ones.

Also, optimize Loop::verifyLoop, since it gets called a lot. Use
searches on a sorted list of blocks instead of calling the "contains"
function, as is done in other places in the Loop class, since "contains"
does a linear search. Also, don't call verifyLoop from LoopSimplify or
LCSSA, as the PassManager is already calling verifyLoop as part of
LoopInfo's verifyAnalysis.

llvm-svn: 81221
 2009-09-08 15:45:00 +00:00
Evan Cheng
a191202da5 Revert r80926. It causes loop unswitch assertion and slow down some JIT tests significantly. 
llvm-svn: 81101
 2009-09-06 02:26:10 +00:00
Dan Gohman
7296225414 Add a verifyAnalysis to LoopInfo, LoopSimplify, and LCSSA form that verify 
that these passes are properly preserved.

Fix several transformation passes that claimed to preserve LoopSimplify
form but weren't.

llvm-svn: 80926
 2009-09-03 16:31:42 +00:00
Dan Gohman
382f174be1 Move getUniqueExitBlocks from LoopBase to Loop, since they depend on 
LoopSimplify form, which is currently only available on Loops (and
not MachineLoops). Also, move the code out of the header file.

llvm-svn: 80923
 2009-09-03 16:10:48 +00:00
Dan Gohman
69ced456fa Minor code simplification. 
llvm-svn: 80266
 2009-08-27 17:59:08 +00:00
Andreas Neustifter
219665e07c Implemented comments from Daniel Dunbar. 
(See http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20090817/084958.html)

llvm-svn: 80100
 2009-08-26 15:13:44 +00:00
Chris Lattner
f536c93134 convert LoopInfo.h and GraphWriter.h to use raw_ostream 
llvm-svn: 79836
 2009-08-23 07:19:13 +00:00
Chris Lattner
1c0452caeb Change Pass::print to take a raw ostream instead of std::ostream, 
update all code that this affects.

llvm-svn: 79830
 2009-08-23 06:03:38 +00:00
Chris Lattner
ea2bfd7a9f eliminate the std::ostream form of WriteAsOperand and update clients. 
This also updates dominator related stuff.

llvm-svn: 79825
 2009-08-23 05:17:37 +00:00
Daniel Dunbar
9d9f5741a8 Some ProfileInfo cleanups. 
- Part of optimal static profiling patch sequence by Andreas Neustifter.

llvm-svn: 78485
 2009-08-08 18:59:03 +00:00
Daniel Dunbar
6eb6029bc2 Add a basic static ProfileInfo provider (ProfileEstimatorPass). 
- Part of optimal static profiling patch sequence by Andreas Neustifter.

llvm-svn: 78484
 2009-08-08 18:44:18 +00:00
Dan Gohman
69d03cf2ee Add an isLoopSimplifyForm() predicate, following the example of 
isLCSSAForm(), to test whether a loop is in the form guaranteed
by the LoopSimplify pass.

llvm-svn: 76077
 2009-07-16 16:16:23 +00:00
Dan Gohman
9a193635a4 Fix a typo in a comment that Duncan noticed. 
llvm-svn: 75804
 2009-07-15 17:38:23 +00:00
Dan Gohman
81885d5b80 Make makeLoopInvariant report whether it made any changes or not, 
and use this to simplify more code.

llvm-svn: 75722
 2009-07-15 01:25:43 +00:00
Dan Gohman
80062e52e0 Introduce a new LoopInfo utility function makeLoopInvariant, which 
works similar to isLoopInvariant, except that it will do trivial
hoisting to try to make the value loop invariant if it isn't already.
This makes it easier for transformation passes to clear trivial
instructions out of the way (the regular LICM pass doesn't run
until relatively late). This is code factored out of LoopSimplify
and other places.

llvm-svn: 75578
 2009-07-14 01:06:29 +00:00
Dan Gohman
9a7df22e10 Move isLCSSAForm, isLoopInvariant, getCanonicalInductionVariable, 
and related functions out of LoopBase and into Loop, since they
are specific to BasicBlock-based loops. This also allows the code
to be moved out-of-line.

llvm-svn: 75523
 2009-07-13 22:02:44 +00:00
Dan Gohman
f6caa6f1e3 Make Loop and MachineLoop be subclasses of LoopBase, rather than typedefs, 
using the Curiously Recurring Template Pattern with LoopBase.

This will help further refactoring, and future functionality for
Loop. Also, Headers can now foward-declare Loop, instead of pulling
in LoopInfo.h or doing tricks.

llvm-svn: 75519
 2009-07-13 21:51:15 +00:00
Dan Gohman
e25e17d91e Eliminate a layer of indirection in LoopInfo and MachineLoopInfo. 
llvm-svn: 74394
 2009-06-27 21:22:48 +00:00
Dan Gohman
a9918a5471 Add a getUniqueExitBlock utility function, similar to getExitBlock, 
but for getUniqueExitBlocks.

llvm-svn: 74145
 2009-06-25 00:09:57 +00:00
Dan Gohman
aa59d257a4 Add some comments noting how IndVarSimplify facilitates 
LoopInfo functionality.

llvm-svn: 72091
 2009-05-19 01:52:46 +00:00
Dan Gohman
13bdd062ea Add a getExitBlock utility function to LoopInfo which returns the 
exit block of a loop, if there is exactly one, similar to
getExitingBlock.

llvm-svn: 71245
 2009-05-08 20:07:23 +00:00