5e72db3f7f
Add FastDSE, a new algorithm for doing dead store elimination. This algorithm is not as accurate
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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.
llvm-svn: 38517
2007-07-11 00:46:18 +00:00
084d3c2e2f
Make the pass registration static.
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llvm-svn: 38508
2007-07-10 20:20:19 +00:00
76547349c1
During module cloning copy aliases too. This fixes PR1544
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llvm-svn: 38505
2007-07-10 19:07:35 +00:00
e635cc43c6
Update the ValueRanges interface to use value numbers instead of Value*s.
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llvm-svn: 38483
2007-07-10 03:28:21 +00:00
4c4b238448
Move some key maps from std::map to DenseMap. This improves the time to optimize Anton's testcase from 17.5s
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to 15.7s.
llvm-svn: 38480
2007-07-10 00:27:22 +00:00
41c2cab873
Use a cheaper test, delaying calling find_leader() until we know that it's necessary. This improves
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the time to optimize Anton's testcase from 21.1s to 17.6s.
llvm-svn: 38479
2007-07-10 00:09:25 +00:00
7ee197ecf2
Add an assertion if find_leader fails.
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llvm-svn: 38477
2007-07-09 23:57:18 +00:00
effc7a7d16
Take advantage of the new fast SmallPtrSet assignment operator when propagating AVAIL_OUT sets.
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This reduces the time to optimize Anton's testcase from 31.2s to 21.s!
llvm-svn: 38475
2007-07-09 22:29:50 +00:00
e8ec7661ea
Expose struct size threhold to allow users to tweak their own setting.
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llvm-svn: 38472
2007-07-09 21:19:23 +00:00
56b01eb3d9
Fix a comment.
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llvm-svn: 38459
2007-07-09 16:43:55 +00:00
267ba45249
Improve a hotspot that was making build_sets() slower by calling lookup() too
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often. This improves Anton's testcase from 36s to 32s.
llvm-svn: 38441
2007-07-09 07:56:55 +00:00
1c83b5d999
Start using a set representation that remembers the set of value numbers represented
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in the set. For the moment, this results in a slight performance decrease, but
it lays the groundwork for future improvements.
llvm-svn: 38439
2007-07-09 06:50:06 +00:00
8b99e0ab20
Fix an error where ANTIC_OUT was ending up with more than one expression of
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the same value number. This fixes an infinite loop on 444.namd.
llvm-svn: 37967
2007-07-07 20:13:57 +00:00
9b2252c6f0
Back out Devang's fix for PR1320 because it causes PR1542.
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llvm-svn: 37966
2007-07-07 16:23:34 +00:00
12358b4827
These rountines are now available as part of basic block utilities.
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llvm-svn: 37955
2007-07-06 22:03:47 +00:00
86d0ea973d
Request DominanceFrontiner in advance.
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llvm-svn: 37954
2007-07-06 21:43:22 +00:00
3ee408264b
Preserve various analysis info.
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llvm-svn: 37953
2007-07-06 21:40:13 +00:00
d7767cc2a7
Add SplitEdge and SplitBlock utility routines.
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llvm-svn: 37952
2007-07-06 21:39:20 +00:00
7d4bbc1c0c
Be more aggressive in the heuristic. This mostly exposes more opportunities
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for the GVN part of GVNPRE to apply.
llvm-svn: 37951
2007-07-06 20:29:43 +00:00
3c3dd902ec
Achieve what the incorrect test was trying to do by simply requiring that all
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critical edges be split before we begin.
llvm-svn: 37949
2007-07-06 18:12:36 +00:00
bcdd7ec4c9
Remove an incorrect check.
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llvm-svn: 37948
2007-07-06 16:52:47 +00:00
1ee941dac4
Correct a typo.
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llvm-svn: 37936
2007-07-06 06:01:16 +00:00
02e9698293
Fix a bunch of issues found in a testcase from 400.perlbench.
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llvm-svn: 37929
2007-07-05 23:11:26 +00:00
73dd692173
Break "variable canonicalization" out of InequalityGraph and into its own class
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"ValueNumbering".
llvm-svn: 37881
2007-07-05 03:15:00 +00:00
ca1a184fd8
Fix another bug, this time in PREing select instructions.
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llvm-svn: 37878
2007-07-04 22:33:23 +00:00
cd94fc982a
Fix a typo that was killing GVNPRE of select instructions.
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llvm-svn: 37871
2007-07-04 18:26:18 +00:00
664e260a9c
Fix an error in phi translation of GEPs that was causing failures.
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llvm-svn: 37868
2007-07-04 04:51:16 +00:00
2e4b6feac2
Add support for performing GVNPRE on GEP instructions.
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llvm-svn: 37862
2007-07-03 23:51:19 +00:00
b9a494aea3
Add functionality to value number GEP instructions. This also provides the infrastructure that will
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be used for function calls. NOTE: This does not yet do any transformation of GEPs or function calls.
llvm-svn: 37860
2007-07-03 22:50:56 +00:00
6b958c72bd
Make the unary operator case a bit faster, since casts are the only kind of unary operation.
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llvm-svn: 37857
2007-07-03 19:01:42 +00:00
59bd053fc5
Add support for performing GVNPRE on cast instructions, and add a testcase for this.
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llvm-svn: 37856
2007-07-03 18:37:08 +00:00
0975c6d7f9
Preserve DominanceFrontier.
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llvm-svn: 37820
2007-06-29 23:11:49 +00:00
1e2a12019f
Fix reference to iterator invalidated by an erase operation. Uncovered
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by _GLIBCXX_DEBUG.
llvm-svn: 37796
2007-06-29 02:53:16 +00:00
9feb7f5846
Do not filter loop if candidate branch is in loop header.
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llvm-svn: 37792
2007-06-29 01:39:53 +00:00
67799d4ffb
Add support for value numbering (but not actually optimizing) cast instructions.
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llvm-svn: 37789
2007-06-29 00:51:03 +00:00
c738f7ca42
Add a type field to expressions in preparation for performing GVNPRE on casts.
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llvm-svn: 37788
2007-06-29 00:40:05 +00:00
8a9fa5d081
Add support for performing GVNPRE on select instructions. This fixes test/Transforms/GVNPRE/select.ll.
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llvm-svn: 37783
2007-06-28 23:51:21 +00:00
6ba5ad482f
- Undo previous check and allow loop switch for condtion that is not inside
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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
3304e469f7
Update LoopUnswitch pass to preserve DomiantorTree.
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llvm-svn: 37771
2007-06-28 00:49:00 +00:00
3c723c8db7
If a condition is not inside a loop then the condition is suitable
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to loop unswitch candidate for the loop.
llvm-svn: 37770
2007-06-28 00:44:10 +00:00
e02da55cc8
Make many sets a much more reasonable size. This decreases the time to optimize
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Anton's testcase from 35.5s to 34.7s.
llvm-svn: 37769
2007-06-28 00:34:34 +00:00
7dae8efcf2
Use cached information that has already been computed to make clean() simpler and faster. This is a small speedup on most cases.
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llvm-svn: 37761
2007-06-27 17:38:29 +00:00
0eb265729a
Fold a lot of code into two cases: binary instructions and ternary instructions.
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This saves many lines of code duplication. No functionality change.
llvm-svn: 37759
2007-06-27 17:03:03 +00:00
8d438858c8
Fix a bug.
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llvm-svn: 37751
2007-06-27 09:50:26 +00:00
b6a39fcb21
Add support for performing GVNPRE on the three vector-specific operations.
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llvm-svn: 37745
2007-06-27 04:10:46 +00:00
5477c54aa0
1. Correct some comments and clean up some dead code.
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2. When calculating ANTIC_IN, only iterate the changed blocks. For most average
inputs this is a small speedup, but for cases with unusual CFGs, this can be a significant win.
llvm-svn: 37742
2007-06-26 23:29:41 +00:00
ea5c4bd51c
fix Transforms/Inline/2007-06-25-WeakInline.ll by not inlining functions
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with weak linkage.
llvm-svn: 37723
2007-06-25 21:50:09 +00:00
43ca4b48f1
Use the built-in postorder iterators rather than computing a postorder walk by hand.
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llvm-svn: 37721
2007-06-25 18:25:31 +00:00
191eb06352
1) Fix an issue with non-deterministic iteration order in phi_translate
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2) Remove some maximal-set computing code that is no longer used.
3) Use a post-order CFG traversal to compute ANTIC_IN instead of a postdom traversal.
This causes the ANTIC_IN calculation to converge much faster. Thanks to Daniel Berlin for suggesting this.
With this patch, the time to optimize 403.gcc decreased from 17.5s to 7.5s, and Anton's huge
testcase decreased from 62 minutes to 38 seconds.
llvm-svn: 37714
2007-06-25 05:41:12 +00:00
8735f44104
Fix value ranges.
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llvm-svn: 37713
2007-06-24 20:14:22 +00:00
Owen Anderson