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59 Commits

Author SHA1 Message Date
Owen Anderson
6032a5ba64 1. Correct some comments and clean up some dead code. 
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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37742 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-26 23:29:41 +00:00
Owen Anderson
9030d384c4 Use the built-in postorder iterators rather than computing a postorder walk by hand. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37721 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-25 18:25:31 +00:00
Owen Anderson
f62c44a38d 1) Fix an issue with non-deterministic iteration order in phi_translate 
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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37714 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-25 05:41:12 +00:00
Owen Anderson
79a6370133 Fix a silly mistake that was causing failures. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37712 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-24 08:42:24 +00:00
Owen Anderson
647580483c Rework topo_sort so eliminate some behavior that scaled terribly. This reduces the time to optimize 403.gcc from 18.2s to 17.5s, 
and has an even larger effect on larger testcases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37708 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-22 21:31:16 +00:00
Owen Anderson
2106f61f23 Perform fewer set insertions while calculating ANTIC_IN. This reduces the amount of time to optimize 403.gcc from 21.9s to 18.2s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37707 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-22 18:27:04 +00:00
Owen Anderson
b3b37345de Remove some code that I was using for collecting performance information that should not have been committed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37706 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-22 17:04:40 +00:00
Owen Anderson
124084604d Avoid excessive calls to find_leader when calculating AVAIL_OUT. This reduces the time to optimize 403.gcc from 23.5s to 21.9s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37702 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-22 03:14:03 +00:00
Owen Anderson
e8138ffeaf Reserve space in vectors before topologically sorting into them. This improves the time to optimize 403.gcc from 28s to 23.5s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37699 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-22 00:43:22 +00:00
Owen Anderson
82575d8ab1 Make a bunch of optimizations for compile time to GVNPRE, including smarter set unions, deferring blocks rather than computing maximal sets, and smarter use of sets. With these enhancements, the time to optimize 273.perlbmk goes from 5.3s to 2.7s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37698 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-22 00:20:30 +00:00
Owen Anderson
66fd906074 Change lots of sets from std::set to SmallPtrSet. This reduces the time required to optimize 253.perlbmk from 10.9s to 5.3s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37690 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-21 17:57:53 +00:00
Owen Anderson
58e087b6e3 Eliminate a redundant check. This speeds up optimization of 253.perlbmk from 13.5 seconds to 10.9 seconds. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37683 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-21 01:59:05 +00:00
Owen Anderson
9cb56014ce Comment-ize the functions in GVNPRE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37681 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-21 00:19:05 +00:00
Owen Anderson
3eaca716bf Split runOnFunction into many smaller functions. This make it easier to get accurate performance analysis of GVNPRE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37678 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-20 22:10:02 +00:00
Owen Anderson
0304b2bc2b Make GVNPRE accurate report whether it modified the function or not. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37673 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-20 18:30:20 +00:00
Owen Anderson
5dbea73e35 Get rid of an unneeded helper function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37670 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-20 00:43:33 +00:00
Owen Anderson
4f703ec0a1 Use a DenseMap instead of an std::map for the value numbering. This reduces the time to optimize lencod on a PPC Debug build from ~300s to ~140s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37668 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 23:23:54 +00:00
Owen Anderson
52471b102c Make dependsOnInvoke much more specific in what it tests, which in turn make it much faster to run. This reduces the time to optimize lencondwith a debug build on PPC from ~450s to ~300s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37667 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 23:07:16 +00:00
Owen Anderson
d0954105f0 Handle constants in phi nodes properly. This fixes test/Transforms/GVNPRE/2007-06-18-ConstantInPhi.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37655 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 07:35:36 +00:00
Owen Anderson
20cb51fda4 Be careful to erase values from all of the appropriate sets when they're not needed anymore. This fixes a few more memory-related issues. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37647 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 05:37:32 +00:00
Owen Anderson
6cae7409b1 Remember to clear the maximal sets between functions. 
Thanks to Nicholas for valgrinding this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37646 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 04:32:55 +00:00
Owen Anderson
086f5f350b Refactor GVNPRE to use a much smart method of uniquing value sets, and centralize a lot of the value numbering information. No functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37645 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 03:31:41 +00:00
Owen Anderson
bbf1197be1 Cache the results of dependsOnInvoke() 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37622 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-18 04:42:29 +00:00
Owen Anderson
a8daa7176b Fix indentation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37621 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-18 04:31:21 +00:00
Owen Anderson
60e174495a Don't perform an expensive check if it's not necessary. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37620 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-18 04:30:44 +00:00
Owen Anderson
32bc789b6c Fix test/Transforms/GVNPRE/2007-06-15-InvokeInst.ll by ignoring all instructions that depend on invokes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37610 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-16 00:26:54 +00:00
Owen Anderson
383bcb2e78 Fix test/Transforms/GVNPRE/2007-06-15-Looping.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37595 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-15 17:55:15 +00:00
Owen Anderson
71fcebcf8a Fix test/Transforms/GVNPRE/2007-06-12-PhiTranslate.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37564 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-12 22:43:57 +00:00
Owen Anderson
239e71201e Refactor some code, and fix test/Transforms/GVNPRE/2007-06-12-NoExit.ll by being more careful when using 
post-dominator information.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37556 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-12 16:57:50 +00:00
Owen Anderson
65d2862a60 Fix a few more bugs, including an instance of walking in reverse topological rather than topological order. This 
fixes a testcase extracted from llvm-test.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37550 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-12 00:50:47 +00:00
Owen Anderson
0e71466405 Handle functions with multiple exit blocks properly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37539 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-11 16:25:17 +00:00
Owen Anderson
139fe848a2 Perform PRE of comparison operators. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37536 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-09 18:35:31 +00:00
Owen Anderson
b8b873cb7d Collect statistics from GVN-PRE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37530 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-08 22:02:36 +00:00
Owen Anderson
a7f916cf89 Fix typo in a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37526 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-08 20:57:08 +00:00
Owen Anderson
8338ff5ff1 Fix a bug that was causing the elimination phase not to replace values when it should be. 
With this patch, GVN-PRE now correctly optimizes the example from the thesis.

Many thanks to Daniel Berlin for helping me find errors in this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37525 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-08 20:44:02 +00:00
Owen Anderson
900997ba3b Small bugfix, and const-ify some methods (Thanks, Bill). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37513 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-08 01:52:45 +00:00
Owen Anderson
397d405731 Add partial redundancy elimination. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37510 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-08 01:03:01 +00:00
Owen Anderson
12112af5e8 Add simple full redundancy elimination. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37455 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-06 01:27:49 +00:00
Owen Anderson
1d4eb6ab0d Fix a misunderstanding of the algorithm. Really, we should be tracking values 
and expression separately.  We can get around this, however, by only keeping
opaque values in TMP_GEN.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37443 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-05 23:46:12 +00:00
Owen Anderson
8f862c80bc Don't leak memory. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37442 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-05 22:11:49 +00:00
Owen Anderson
359208032b Fix a small bug, some 80 cols violations, and add some more debugging output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37436 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-05 17:31:23 +00:00
Owen Anderson
dbc705b73f Don't use std::set_difference when the two sets are sorted differently. Compute 
the difference manually instead.

This allows GVNPRE to produce correct analysis for the example in the GVNPRE
paper.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37425 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-04 23:34:56 +00:00
Owen Anderson
082fe7185e Fix a bunch of small bugs, and improve the debugging output significantly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37424 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-04 23:28:33 +00:00
Owen Anderson
5ea069fdda Make phi_translate correct. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37418 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-04 18:05:26 +00:00
Devang Patel
26042420d6 s/llvm::DominatorTreeBase::DomTreeNode/llvm::DomTreeNode/g 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37407 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-04 00:32:22 +00:00
Owen Anderson
0fa6b37c6f Don't use the custom comparator where it's not necessary. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37406 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-03 22:02:14 +00:00
Devang Patel
bec7647f98 s/DominatorTreeBase::Node/DominatorTreeBase:DomTreeNode/g 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37403 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-03 06:26:14 +00:00
Owen Anderson
10ac137d0b Remove an unused method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37402 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-03 05:58:25 +00:00
Owen Anderson
a724ac1a73 There's no need to have an Expression class... Value works just as well! This simplifies a lot of code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37401 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-03 05:55:58 +00:00
Owen Anderson
aa7d3351f0 clean() needs to process things in topological order. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37389 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-01 22:00:37 +00:00