d6bde46d85
Promote shifts by a constant to multiplies so that we can reassociate
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(x<<1)+(y<<1) -> (X+Y)<<1. This implements
Transforms/Reassociate/shift-factor.ll
llvm-svn: 26753
2006-03-14 06:55:18 +00:00
4c065091d8
Add factoring of multiplications, e.g. turning A*A+A*B into A*(A+B).
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Testcase here: Transforms/Reassociate/mulfactor.ll
llvm-svn: 26524
2006-03-04 09:31:13 +00:00
c597b8a55e
Make iostream #inclusion explicit
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llvm-svn: 25514
2006-01-22 23:32:06 +00:00
b5e381a8cf
Fix a problem that Dan Berlin noticed, where reassociation would not succeed
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in building maximal expressions before simplifying them. In particular, i
cases like this:
X-(A+B+X)
the code would consider A+B+X to be a maximal expression (not understanding
that the single use '-' would be turned into a + later), simplify it (a noop)
then later get simplified again.
Each of these simplify steps is where the cost of reassociation comes from,
so this patch should speed up the already fast pass a bit.
Thanks to Dan for noticing this!
llvm-svn: 23214
2005-09-02 07:07:58 +00:00
9fe263aa75
Avoid creating garbage instructions, just move the old add instruction
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to where we need it when converting -(A+B+C) -> -A + -B + -C.
llvm-svn: 23213
2005-09-02 06:38:04 +00:00
d1325da091
add some assertions and fix problems where reassociate could access the
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Ops vector out of range
llvm-svn: 23211
2005-09-02 05:23:22 +00:00
8ca5b2a6d2
Fix Regression/Transforms/Reassociate/2005-08-24-Crash.ll
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llvm-svn: 23019
2005-08-24 17:55:32 +00:00
9f269e40c9
Use the new 'moveBefore' method to simplify some code. Really, which is
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easier to understand? :)
llvm-svn: 22706
2005-08-08 19:11:57 +00:00
5f4ef3c5a8
Eliminate all remaining tabs and trailing spaces.
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llvm-svn: 22523
2005-07-27 06:12:32 +00:00
31c667e234
Fix Reassociate/shifttest.ll
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llvm-svn: 21839
2005-05-10 03:39:25 +00:00
df3332660f
Implement Reassociate/mul-neg-add.ll
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llvm-svn: 21788
2005-05-08 21:41:35 +00:00
c4f8e2b0ed
Bail out earlier
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llvm-svn: 21786
2005-05-08 21:33:47 +00:00
877b114037
Teach reassociate that 0-X === X*-1
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llvm-svn: 21785
2005-05-08 21:28:52 +00:00
9f284e0a3c
Fix PR557 and basictest[34].ll.
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This makes reassociate realize that loads should be treated as unmovable, and
gives distinct ranks to distinct values defined in the same basic block, allowing
reassociate to do its thing.
llvm-svn: 21783
2005-05-08 20:57:04 +00:00
9187f3905e
Add debugging information
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llvm-svn: 21781
2005-05-08 20:09:57 +00:00
08582be283
eliminate gotos
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llvm-svn: 21780
2005-05-08 19:48:43 +00:00
5847e5e10c
Improve reassociation handling of inverses, implementing inverses.ll.
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llvm-svn: 21778
2005-05-08 18:59:37 +00:00
e1850b86b6
Refactor some code
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llvm-svn: 21772
2005-05-08 00:19:31 +00:00
6e2086d7e4
Handle some simple cases where we can see that values get annihilated.
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llvm-svn: 21771
2005-05-08 00:08:33 +00:00
1e5065052a
Rewrite the guts of the reassociate pass to be more efficient and logical. Instead
...
of trying to do local reassociation tweaks at each level, only process an expression
tree once (at its root). This does not improve the reassociation pass in any real way.
llvm-svn: 21768
2005-05-07 21:59:39 +00:00
cea579932d
Convert shifts to muls to assist reassociation. This implements
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Reassociate/shifttest.ll
llvm-svn: 21761
2005-05-07 04:24:13 +00:00
f43e974abd
Simplify the code and rearrange it. No major functionality changes here.
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llvm-svn: 21759
2005-05-07 04:08:02 +00:00
b1c9317bb4
Remove trailing whitespace
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llvm-svn: 21427
2005-04-21 23:48:37 +00:00
531f9e92d4
This mega patch converts us from using Function::a{iterator|begin|end} to
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using Function::arg_{iterator|begin|end}. Likewise Module::g* -> Module::global_*.
This patch is contributed by Gabor Greif, thanks!
llvm-svn: 20597
2005-03-15 04:54:21 +00:00
7c16caa336
Changes For Bug 352
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Move include/Config and include/Support into include/llvm/Config,
include/llvm/ADT and include/llvm/Support. From here on out, all LLVM
public header files must be under include/llvm/.
llvm-svn: 16137
2004-09-01 22:55:40 +00:00
2b3387a6d9
Fix #includes of i*.h => Instructions.h as per PR403.
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llvm-svn: 15328
2004-07-29 17:05:13 +00:00
9a63520b1a
Fixes working towards PR341
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llvm-svn: 14839
2004-07-15 01:50:47 +00:00
163c87fc32
Make this pass use a more specific debug message than "Processing:".
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llvm-svn: 14541
2004-07-01 19:27:10 +00:00
49525f8cf4
Finegrainify namespacification
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llvm-svn: 10725
2004-01-09 06:02:20 +00:00
960707c335
Put all LLVM code into the llvm namespace, as per bug 109.
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llvm-svn: 9903
2003-11-11 22:41:34 +00:00
ad03afcb34
Declare FunctionPasses as such so that they can be used in FunctionPassManager.
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llvm-svn: 9768
2003-11-07 17:20:18 +00:00
482202a601
Added LLVM project notice to the top of every C++ source file.
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Header files will be on the way.
llvm-svn: 9298
2003-10-20 19:43:21 +00:00
b94550e537
Change the Opcode enum for PHI nodes from "Instruction::PHINode" to "Instruction::PHI" to be more consistent with the other instructions.
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llvm-svn: 9269
2003-10-19 21:34:28 +00:00
f95d9b99b3
Decrease usage of use_size()
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llvm-svn: 9135
2003-10-15 16:48:29 +00:00
e051f86a3d
Credits now go into the top-level CREDITS.TXT
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llvm-svn: 8662
2003-09-22 21:57:56 +00:00
7eb05a170a
Spell `necessary' correctly.
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llvm-svn: 7944
2003-08-18 14:43:39 +00:00
8ac196dd3b
Assign arguments different ranks so they get grouped together
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llvm-svn: 7813
2003-08-13 16:16:26 +00:00
98b3ecddec
Fix bug: Reassociate/2003-08-12-InfiniteLoop.ll
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llvm-svn: 7792
2003-08-12 21:45:24 +00:00
58c7eb60ec
Assign finer grained ranks, make sure to reassociate top-level after reassociating bottom level
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llvm-svn: 7787
2003-08-12 20:14:27 +00:00
8abcd56c74
DEBUG got moved to Support/Debug.h
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llvm-svn: 7492
2003-08-01 22:15:03 +00:00
3666378690
Fix spelling
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llvm-svn: 5983
2003-05-02 19:26:34 +00:00
889f620841
Remove unnecesary &*'s
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llvm-svn: 5872
2003-04-23 16:37:45 +00:00
4869f3700e
Rename Instruction::hasSideEffects() -> mayWriteToMemory()
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llvm-svn: 5620
2003-02-24 20:48:32 +00:00
3aa7767352
Fix a huge performance problem in reassociate by introducing a
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rank map cache for instruction ranks
llvm-svn: 5030
2002-12-15 03:56:00 +00:00
f96c8befe0
Minor changes:
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* Reword comment to make more clear
* Don't print out BB's after modification made
* Don't delete and new an instruction when we need to move something, just move it.
llvm-svn: 5029
2002-12-15 03:49:50 +00:00
8fdf75cde5
Fixes to the reassociate pass to make it respect dominance properties
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Huge thanks go to Casey Carter for writing this fix, reassociate is now
reoperational!
llvm-svn: 4471
2002-10-31 17:12:59 +00:00
820d971233
- Rename AnalysisUsage::preservesAll to getPreservesAll & preservesCFG to
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setPreservesCFG to be less confusing.
llvm-svn: 4255
2002-10-21 20:00:28 +00:00
bf3a099a62
Updates to work with recent Statistic's changes:
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* Renamed StatisticReporter.h/cpp to Statistic.h/cpp
* Broke constructor to take two const char * arguments instead of one, so
that indendation can be taken care of automatically.
* Sort the list by pass name when printing
* Make sure to print all statistics as a group, instead of randomly when
the statistics dtors are called.
* Updated ProgrammersManual with new semantics.
llvm-svn: 4002
2002-10-01 22:38:41 +00:00
28a8d2468a
Simplify code (somtimes dramatically), by using the new "auto-insert" feature
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of instruction constructors.
llvm-svn: 3656
2002-09-10 17:04:02 +00:00
c8b7092e54
* Add support for different "PassType's"
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* Add new RegisterOpt/RegisterAnalysis templates for registering passes that
are to show up in opt or analyze
* Register Analyses now
* Change optimizations to use RegisterOpt instead of RegisterPass
* Add support for different "PassType's"
* Add new RegisterOpt/RegisterAnalysis templates for registering passes that
are to show up in opt or analyze
* Register Analyses now
* Change optimizations to use RegisterOpt instead of RegisterPass
* Remove getPassName implementations from various subclasses
llvm-svn: 3113
2002-07-26 21:12:46 +00:00
10073a9080
*** empty log message ***
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llvm-svn: 3075
2002-07-25 06:17:51 +00:00
b28b680155
*** empty log message ***
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llvm-svn: 3016
2002-07-23 18:06:35 +00:00
113f4f4609
MEGAPATCH checkin.
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For details, See: docs/2002-06-25-MegaPatchInfo.txt
llvm-svn: 2779
2002-06-25 16:13:24 +00:00
71cbd42b98
Use the new DEBUG(x) macro to allow debugging code to be enabled on the commandline
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llvm-svn: 2713
2002-05-22 17:17:27 +00:00
7bc532dded
* Make debug output conditional on #define
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* Add optimization to rank computation to not recursively search when
unneccesary.
* More agressively negate expressions to open reassociation opportunities.
* Linearize (A+B)+(C+D) into ((A+B)+C)+D
llvm-svn: 2637
2002-05-16 04:37:07 +00:00
0b18c1d64e
Add support for printing out statistics information when -stats is added to
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the command line
llvm-svn: 2601
2002-05-10 15:38:35 +00:00
6bd7ac6205
Give the longer name to the instruction that will probably be eliminated later
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llvm-svn: 2581
2002-05-09 20:11:23 +00:00
c0f5800678
Initial checkin of expression reassociation pass
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llvm-svn: 2559
2002-05-08 22:19:27 +00:00
Chris Lattner