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110 Commits

Author SHA1 Message Date
Dan Gohman
6c3534c5aa Add some comments noting how IndVarSimplify facilitates 
LoopInfo functionality.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72091 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-19 01:52:46 +00:00
Dan Gohman
1827e8263c Add a getExitBlock utility function to LoopInfo which returns the 
exit block of a loop, if there is exactly one, similar to
getExitingBlock.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71245 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 20:07:23 +00:00
Dan Gohman
927793b6a1 Make LoopInfo::print() identify header, exit, and latch blocks, 
and print the loop depth.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65593 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-27 00:05:54 +00:00
Dan Gohman
b317143ba8 Clarify the definition of "latch block" in a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64916 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-18 16:43:19 +00:00
Dan Gohman
865f006bb4 Eliminate several more unnecessary intptr_t casts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64888 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-18 05:09:16 +00:00
Dan Gohman
c83324682f Add a utility function to LoopInfo to return the exit block 
when the loop has exactly one exit, and make use of it in
LoopIndexSplit.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64388 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-12 18:08:24 +00:00
Dan Gohman
f3ab3a9372 Simplify some code by using blocks_begin(), blocks_end(), and 
the iterator typedefs instead of handling the std::vector
directly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64016 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-07 16:10:35 +00:00
Gabor Greif
a36791da41 Simplify the logic of getting hold of a PHI predecessor block. 
There is now a direct way from value-use-iterator to incoming block in PHINode's API.
This way we avoid the iterator->index->iterator trip, and especially the costly
getOperandNo() invocation. Additionally there is now an assertion that the iterator
really refers to one of the PHI's Uses.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62869 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-01-23 19:40:15 +00:00
Dale Johannesen
2f46bb8178 Fix the time regression I introduced in 464.h264ref with 
my earlier patch to this file.

The issue there was that all uses of an IV inside a loop
are actually references to Base[IV*2], and there was one
use outside that was the same but LSR didn't see the base
or the scaling because it didn't recurse into uses outside
the loop; thus, it used base+IV*scale mode inside the loop
instead of pulling base out of the loop.  This was extra bad
because register pressure later forced both base and IV into
memory.  Doing that recursion, at least enough
to figure out addressing modes, is a good idea in general;
the change in AddUsersIfInteresting does this.  However,
there were side effects....

It is also possible for recursing outside the loop to
introduce another IV where there was only 1 before (if
the refs inside are not scaled and the ref outside is).
I don't think this is a common case, but it's in the testsuite.
It is right to be very aggressive about getting rid of
such introduced IVs (CheckForIVReuse and the handling of
nonzero RewriteFactor in StrengthReduceStridedIVUsers).
In the testcase in question the new IV produced this way
has both a nonconstant stride and a nonzero base, neither
of which was handled before.  And when inserting 
new code that feeds into a PHI, it's right to put such 
code at the original location rather than in the PHI's 
immediate predecessor(s) when the original location is outside 
the loop (a case that couldn't happen before)
(RewriteInstructionToUseNewBase); better to avoid making
multiple copies of it in this case.

Also, the mechanism for keeping SCEV's corresponding to GEP's
no longer works, as the GEP might change after its SCEV
is remembered, invalidating the SCEV, and we might get a bad
SCEV value when looking up the GEP again for a later loop.  
This also couldn't happen before, as we weren't recursing
into GEP's outside the loop.

Also, when we build an expression that involves a (possibly
non-affine) IV from a different loop as well as an IV from
the one we're interested in (containsAddRecFromDifferentLoop),
don't recurse into that.  We can't do much with it and will
get in trouble if we try to create new non-affine IVs or something.

More testcases are coming.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62212 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-01-14 02:35:31 +00:00
Dan Gohman
d68a07650c Tidy up #includes, deleting a bunch of unnecessary #includes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61715 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-01-05 17:59:02 +00:00
Dan Gohman
a8c763b307 Use empty() instead of begin() == end(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54780 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-14 18:13:49 +00:00
Dan Gohman
c418bf3dd5 Use find instead of lower_bound. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53474 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-11 20:58:19 +00:00
Dan Gohman
1002c02034 Add explicit keywords. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53179 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-07 18:00:37 +00:00
Dan Gohman
1d5562f72e Move RemoveFromVector out of the global namespace. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51090 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-14 01:02:49 +00:00
Dan Gohman
45b3197090 Split the loop unroll mechanism logic out into a utility function. 
Patch by Matthijs Kooijman!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51083 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-14 00:24:14 +00:00
Dan Gohman
84b7df43fb Remove uses of llvm/System/IncludeFile.h that are no longer needed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50695 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-06 01:32:53 +00:00
Devang Patel
be5918c079 Remove unused function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50664 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-05 19:44:16 +00:00
Evan Cheng
34cd4a484e Fix more -Wshorten-64-to-32 warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50659 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-05 18:30:58 +00:00
Nick Lewycky
280a6e607d Remove 'unwinds to' support from mainline. This patch undoes r47802 r47989 
r48047 r48084 r48085 r48086 r48088 r48096 r48099 r48109 and r48123.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50265 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 16:53:59 +00:00
Devang Patel
c758209153 PassInfo keep tracks whether a pass is an analysis pass or not. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48554 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-19 21:56:59 +00:00
Devang Patel
c7fe32e840 Do not use virtual function to identify an analysis pass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48520 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-19 00:48:41 +00:00
Dale Johannesen
e856685710 Get rid of compilation warnings. Per Devang. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48478 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-18 01:52:17 +00:00
Devang Patel
1cee94f041 Identify Analysis pass. 
Do not run analysis pass again if analysis info is still available.
This fixes PR1441.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48476 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-18 00:39:19 +00:00
Nick Lewycky
529de8a457 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48088 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-09 05:24:34 +00:00
Anton Korobeynikov
ae9f3a3b7c Unbreak build with gcc 4.3: provide missed includes and silence most annoying warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47367 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-02-20 11:08:44 +00:00
Wojciech Matyjewicz
402689d11a Add a check if the initial value of the induction variable is 0 (the method comment says it should be). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46907 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-02-09 18:06:58 +00:00
Dan Gohman
ba42d2b937 Add comments describing what the loop depth values mean. Also, make a 
minor simplification to the loop depth calculation code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46511 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-29 12:12:40 +00:00
Chris Lattner
fadcd4e60b Move typedef of loop to top of the file where it is more obvious. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45857 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-11 06:29:42 +00:00
Chris Lattner
131bd2ecf7 Fix 80 col violations 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45856 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-11 06:27:42 +00:00
Wojciech Matyjewicz
b670a1737b fix typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45595 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-04 20:04:08 +00:00
Chris Lattner
7ed47a1335 Don't attribute in file headers anymore. See llvmdev for the 
discussion of this change.  Boy are my fingers tired. ;-)



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45411 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-29 19:59:42 +00:00
Owen Anderson
528b00adc4 Fixes for MachineLoopInfo, mostly from Evan. With these, it should be almost useable! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44480 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-01 03:01:39 +00:00
Owen Anderson
e4ad9c70e4 Add MachineLoopInfo. This is not yet tested. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44384 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-11-27 22:47:08 +00:00
Owen Anderson
d735ee85db Make LoopInfoBase more generic, in preparation for having MachineLoopInfo. This involves a small interface change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44348 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-11-27 03:43:35 +00:00
Anton Korobeynikov
d91cbf352a Remove a leak. Destroy LoopInfoBase object. releaseMemory() is actually called in its dtor. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44317 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-11-25 18:41:39 +00:00
Owen Anderson
44a95e06cc More templatization. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44158 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-11-15 05:00:15 +00:00
Owen Anderson
019b92a70c Start the process of making MachineLoopInfo possible by templating Loop. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44097 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-11-14 02:33:58 +00:00
Dan Gohman
21c276d2fa Add empty() member functions to a few container-like classes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42487 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-10-01 16:01:23 +00:00
Devang Patel
7c6c55db4d No need to hardcode SmallVector size. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41228 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-21 16:39:43 +00:00
Devang Patel
b7211a2ce1 Use SmallVector instead of std::vector. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41207 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-21 00:31:24 +00:00
Reid Spencer
276222a5ae Change casts from old style to new style. This helps document the details 
better, gives the compiler a chance to validate the cast and reduces warnings
if the user turns on -Wold-style-cast option.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41033 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-12 08:12:35 +00:00
Devang Patel
58e0ef1e90 Verify loop info. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40062 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-19 18:02:32 +00:00
Devang Patel
53c279b194 Use DominatorTree instead of ETForest. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37507 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-08 00:17:13 +00:00
Nick Lewycky
ecd94c804a Fix typo in comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36873 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-06 13:37:16 +00:00
Devang Patel
1997473cf7 Drop 'const' 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36662 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-03 01:11:54 +00:00
Devang Patel
3e15bf33e0 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36652 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-02 21:39:20 +00:00
Devang Patel
794fd75c67 Do not use typeinfo to identify pass in pass manager. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36632 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-01 21:15:47 +00:00
Bill Wendling
5c7e326585 Added an automatic cast to "std::ostream*" etc. from OStream. We then can 
rework the hacks that had us passing OStream in. We pass in std::ostream*
instead, check for null, and then dispatch to the correct print() method.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32636 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-17 05:15:13 +00:00
Bill Wendling
e81561909d Changed llvm_ostream et all to OStream. llvm_cerr, llvm_cout, llvm_null, are 
now cerr, cout, and NullStream resp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32298 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-07 01:30:32 +00:00
Bill Wendling
c0ac317f93 Support for llvm streams. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31982 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-28 22:45:17 +00:00