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2009 Commits

Author SHA1 Message Date
Owen Anderson
1b4542b6df Remove the end-block handling code. It was unsafe, and making it safe would have resulted in falling back to the slow DSE case. I need to think some more about the right way to handle this. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39788 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-12 17:52:20 +00:00
Gabor Greif
3b0a7ea66e checked in as obvious, 
thanks Benoit Boissinot!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39774 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-12 13:31:38 +00:00
Owen Anderson
1cb960a4bb Let MemoryDependenceAnalysis take care of updating AliasAnalysis. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39769 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-12 00:06:21 +00:00
Devang Patel
990e866deb Preserve analysis info. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39767 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-11 23:47:28 +00:00
Owen Anderson
a96c1f665a Handle the case where an entire structure is freed, and its dependency is a store to a field within 
that structure.

Also, refactor the runOnBasicBlock() function, splitting some of the special cases into separate functions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39762 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-11 23:19:17 +00:00
Owen Anderson
6f46d65104 Add support for eliminate stores to stack-allocated memory locations at the end 
of a function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39754 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-11 21:06:56 +00:00
Owen Anderson
2655adb3b2 Handle eliminating stores that occur right before a free. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39753 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-11 20:38:34 +00:00
Owen Anderson
bfbfb3c464 Clean up a few things based on Chris' feedback. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39747 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-11 19:03:09 +00:00
Owen Anderson
b77c457cc8 Add FastDSE, a new algorithm for doing dead store elimination. This algorithm is not as accurate 
as the current DSE, but it only a linear scan over each block, rather than quadratic.  Eventually
(once it has been improved somewhat), this will replace the current DSE.

NOTE: This has not yet been extensively tested.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38517 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-11 00:46:18 +00:00
Owen Anderson
16a72bb47d Make the pass registration static. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38508 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-10 20:20:19 +00:00
Nick Lewycky
6e8eb7f075 Update the ValueRanges interface to use value numbers instead of Value*s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38483 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-10 03:28:21 +00:00
Owen Anderson
81c2a6ecbb Move some key maps from std::map to DenseMap. This improves the time to optimize Anton's testcase from 17.5s 
to 15.7s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38480 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-10 00:27:22 +00:00
Owen Anderson
a05a81b10a Use a cheaper test, delaying calling find_leader() until we know that it's necessary. This improves 
the time to optimize Anton's testcase from 21.1s to 17.6s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38479 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-10 00:09:25 +00:00
Owen Anderson
5fd507d431 Add an assertion if find_leader fails. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38477 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-09 23:57:18 +00:00
Owen Anderson
dfa2435784 Take advantage of the new fast SmallPtrSet assignment operator when propagating AVAIL_OUT sets. 
This reduces the time to optimize Anton's testcase from 31.2s to 21.s!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38475 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-09 22:29:50 +00:00
Devang Patel
ff366850aa Expose struct size threhold to allow users to tweak their own setting. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38472 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-09 21:19:23 +00:00
Owen Anderson
ab3fd054ea Fix a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38459 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-09 16:43:55 +00:00
Owen Anderson
b9eeb1acbc Improve a hotspot that was making build_sets() slower by calling lookup() too 
often.  This improves Anton's testcase from 36s to 32s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38441 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-09 07:56:55 +00:00
Owen Anderson
0616dffd64 Start using a set representation that remembers the set of value numbers represented 
in the set.  For the moment, this results in a slight performance decrease, but
it lays the groundwork for future improvements.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38439 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-09 06:50:06 +00:00
Owen Anderson
36a07daabd Fix an error where ANTIC_OUT was ending up with more than one expression of 
the same value number.  This fixes an infinite loop on 444.namd.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37967 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-07 20:13:57 +00:00
Nick Lewycky
8f5149e002 Back out Devang's fix for PR1320 because it causes PR1542. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37966 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-07 16:23:34 +00:00
Devang Patel
05c1dc6493 These rountines are now available as part of basic block utilities. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37955 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-06 22:03:47 +00:00
Devang Patel
7be06f9158 Request DominanceFrontiner in advance. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37954 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-06 21:43:22 +00:00
Devang Patel
658f625d16 Preserve various analysis info. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37953 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-06 21:40:13 +00:00
Owen Anderson
ec5614b522 Be more aggressive in the heuristic. This mostly exposes more opportunities 
for the GVN part of GVNPRE to apply.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37951 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-06 20:29:43 +00:00
Owen Anderson
2c194e6bd1 Achieve what the incorrect test was trying to do by simply requiring that all 
critical edges be split before we begin.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37949 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-06 18:12:36 +00:00
Owen Anderson
6a6152ca2d Remove an incorrect check. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37948 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-06 16:52:47 +00:00
Zhou Sheng
33b0b8d242 Correct a typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37936 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-06 06:01:16 +00:00
Owen Anderson
2a5c9d8aac Fix a bunch of issues found in a testcase from 400.perlbench. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37929 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-05 23:11:26 +00:00
Nick Lewycky
29a05b6a71 Break "variable canonicalization" out of InequalityGraph and into its own class 
"ValueNumbering".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37881 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-05 03:15:00 +00:00
Owen Anderson
ec3ed5f8e4 Fix another bug, this time in PREing select instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37878 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-04 22:33:23 +00:00
Owen Anderson
df30b63663 Fix a typo that was killing GVNPRE of select instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37871 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-04 18:26:18 +00:00
Owen Anderson
9eee94c5f7 Fix an error in phi translation of GEPs that was causing failures. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37868 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-04 04:51:16 +00:00
Owen Anderson
5653322e72 Add support for performing GVNPRE on GEP instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37862 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-03 23:51:19 +00:00
Owen Anderson
eb21686ea9 Add functionality to value number GEP instructions. This also provides the infrastructure that will 
be used for function calls.  NOTE: This does not yet do any transformation of GEPs or function calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37860 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-03 22:50:56 +00:00
Owen Anderson
3d6fac3993 Make the unary operator case a bit faster, since casts are the only kind of unary operation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37857 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-03 19:01:42 +00:00
Owen Anderson
216394f9b3 Add support for performing GVNPRE on cast instructions, and add a testcase for this. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37856 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-03 18:37:08 +00:00
Devang Patel
f34a43acc0 Preserve DominanceFrontier. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37820 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-29 23:11:49 +00:00
Devang Patel
6c631988c7 Do not filter loop if candidate branch is in loop header. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37792 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-29 01:39:53 +00:00
Owen Anderson
ca6c31cc41 Add support for value numbering (but not actually optimizing) cast instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37789 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-29 00:51:03 +00:00
Owen Anderson
40dc00eb82 Add a type field to expressions in preparation for performing GVNPRE on casts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37788 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-29 00:40:05 +00:00
Owen Anderson
890e1a0401 Add support for performing GVNPRE on select instructions. This fixes test/Transforms/GVNPRE/select.ll. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37783 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-28 23:51:21 +00:00
Devang Patel
eb62eca503 - 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37772 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-28 02:05:46 +00:00
Devang Patel
cce624a7a9 Update LoopUnswitch pass to preserve DomiantorTree. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37771 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-28 00:49:00 +00:00
Devang Patel
558f1b8439 If a condition is not inside a loop then the condition is suitable 
to loop unswitch candidate for the loop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37770 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-28 00:44:10 +00:00
Owen Anderson
a20f35d2e7 Make many sets a much more reasonable size. This decreases the time to optimize 
Anton's testcase from 35.5s to 34.7s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37769 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-28 00:34:34 +00:00
Owen Anderson
68cb52e468 Use cached information that has already been computed to make clean() simpler and faster. This is a small speedup on most cases. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37761 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-27 17:38:29 +00:00
Owen Anderson
7b317d2f59 Fold a lot of code into two cases: binary instructions and ternary instructions. 
This saves many lines of code duplication.  No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37759 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-27 17:03:03 +00:00
Zhou Sheng
0d7d3656f3 Fix a bug. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37751 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-27 09:50:26 +00:00
Owen Anderson
62cf8babdb Add support for performing GVNPRE on the three vector-specific operations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37745 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-27 04:10:46 +00:00