27af257ea0
Do not delete dead invoke instructions!
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llvm-svn: 17897
2004-11-16 16:32:28 +00:00
1890f94413
Minor cleanups. There is no reason for SCCP to derive from instvisitor anymore.
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llvm-svn: 17825
2004-11-15 07:15:04 +00:00
9a038a3a5e
Count more accurately
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llvm-svn: 17824
2004-11-15 07:02:42 +00:00
d18c16b842
Two minor improvements:
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1. Speedup getValueState by having it not consider Arguments. It's better
to just add them before we start SCCP'ing.
2. SCCP can delete the contents of dead blocks. No really, it's ok! This
reduces the size of the IR for subsequent passes, even though
simplifycfg would do the same job. In practice, simplifycfg does not
run until much later than sccp in gccas
llvm-svn: 17820
2004-11-15 05:45:33 +00:00
4f0316229c
rename InstValue to LatticeValue, as it holds for more than instructions.
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llvm-svn: 17818
2004-11-15 05:03:30 +00:00
074be1f6e4
Substantially refactor the SCCP class into an SCCP pass and an SCCPSolver
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class. The only changes are minor:
* Do not try to SCCP instructions that return void in the rewrite loop.
This is silly and fool hardy, wasting a map lookup and adding an entry
to the map which is never used.
* If we decide something has an undefined value, rewrite it to undef,
potentially leading to further simplications.
llvm-svn: 17816
2004-11-15 04:44:20 +00:00
7dfc2d29ac
Convert 'struct' to 'class' in various places to adhere to the coding standards
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and work better with VC++. Patch contributed by Morten Ofstad!
llvm-svn: 17281
2004-10-27 16:14:51 +00:00
646354bae1
Handle undef values as undefined on the constant lattice
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ignore unreachable instructions
llvm-svn: 17044
2004-10-16 18:09:41 +00:00
5c91c8f18b
Use DEBUG instead of DebugFlag directly, as DebugFlag does not respect
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-debug-only!
llvm-svn: 16868
2004-10-09 19:30:36 +00:00
3e86084641
Prototype these functions more accurately
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llvm-svn: 16432
2004-09-20 04:43:15 +00:00
6614946443
Convert code to compile with vc7.1.
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Patch contributed by Paolo Invernizzi. Thanks Paolo!
llvm-svn: 16368
2004-09-15 17:06:42 +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
832437255d
Stop using getValues().
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llvm-svn: 15487
2004-08-04 08:44:43 +00:00
f0a5bcaae4
Delete a redundant if branch.
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llvm-svn: 14967
2004-07-18 08:34:52 +00:00
c5afc9512b
bug 122:
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- Replace ConstantPointerRef usage with GlobalValue usage
- Correct isa<Constant> for GlobalValue subclass
llvm-svn: 14947
2004-07-18 00:31:05 +00:00
d79334df33
This patch was contributed by Daniel Berlin!
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Speed up SCCP substantially by processing overdefined values quickly. This
patch speeds up SCCP by about 30-40% on large testcases.
llvm-svn: 14861
2004-07-15 23:36:43 +00:00
9a63520b1a
Fixes working towards PR341
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llvm-svn: 14839
2004-07-15 01:50:47 +00:00
ff9362a8da
Add SCCP support for constant folding calls, implementing:
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test/Regression/Transforms/SCCP/calltest.ll
llvm-svn: 12921
2004-04-13 19:43:54 +00:00
69193f93b6
Support getelementptr instructions which use uint's to index into structure
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types and can have arbitrary 32- and 64-bit integer types indexing into
sequential types.
llvm-svn: 12653
2004-04-05 01:30:19 +00:00
7a7b114871
Do not try to optimize PHI nodes with incredibly high degree. This reduces SCCP
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time from 615s to 1.49s on a large testcase that has a gigantic switch statement
that all of the blocks in the function go to (an intepreter).
llvm-svn: 12442
2004-03-16 19:49:59 +00:00
59db22dcd4
Add sccp support for select instructions
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llvm-svn: 12318
2004-03-12 05:52:44 +00:00
538fee7aa2
Since 'load null' is undefined, we can make it do whatever we want. Returning
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a zero value is the most likely way to cause further simplification, so we do it.
llvm-svn: 12197
2004-03-07 22:16:24 +00:00
76b2ff4ded
Adjustments to support the new ConstantAggregateZero class
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llvm-svn: 11474
2004-02-15 05:55:15 +00:00
1b7d4d7b63
Don't use ConstantExpr::getShift anymore
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llvm-svn: 10791
2004-01-12 19:08:43 +00:00
0fe5b32c01
Use constantexprs for casts. Eliminate use of the ConstantHandling interfaces
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llvm-svn: 10779
2004-01-12 17:43:40 +00:00
fe992d4332
Fix fairly severe bug in my last checking where we treated all unfoldable
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constants as being "true" when evaluating branches. This was introduced
because we now create constantexprs for the constants instead of failing the
fold.
llvm-svn: 10778
2004-01-12 17:40:36 +00:00
49f74522ec
* Implement minor performance optimization for the getelementptr case
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* Implement SCCP of load instructions, implementing Transforms/SCCP/loadtest.ll
This allows us to fold expressions like "foo"[2], even if the pointer is only
a conditional constant.
llvm-svn: 10767
2004-01-12 04:29:41 +00:00
05fe6847a8
Implement SCCP/phitest.ll
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llvm-svn: 10763
2004-01-12 03:57:30 +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
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
f0fc9be634
ADd support for the new varargs instructions
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llvm-svn: 9225
2003-10-18 05:56:52 +00:00
8b2bd4ed47
Fix spelling.
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llvm-svn: 9027
2003-10-10 17:57:28 +00:00
35e56e7372
Update comment
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llvm-svn: 8965
2003-10-08 16:56:11 +00:00
0bbbe5d4c8
Use a set to keep track of which edges have been noticed as executable already
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to avoid reprocessing PHI nodes needlessly. This speeds up the big bad PHI
testcase 43%: from 104.9826 to 73.5157s
llvm-svn: 8964
2003-10-08 16:55:34 +00:00
7324f7cd03
Minor fixes here and there
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llvm-svn: 8963
2003-10-08 16:21:03 +00:00
71ac22ffb5
Avoid building data structures we don't really need. This improves the runtime
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of a test that Bill Wendling sent me from 228.5s to 105s. Obviously there is
more improvement to be had, but this is a nice speedup which should be "felt"
by many programs.
llvm-svn: 8962
2003-10-08 15:47:41 +00:00
9c58cf6d03
Add support for the unwind instruction
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llvm-svn: 8408
2003-09-08 18:54:55 +00:00
df741d62de
Fix bug: SCCP/2003-08-26-InvokeHandling.ll
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llvm-svn: 8152
2003-08-27 01:08:35 +00:00
7eb05a170a
Spell `necessary' correctly.
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llvm-svn: 7944
2003-08-18 14:43:39 +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
7e270580c8
Fix bug: SCCP/2003-06-24-OverdefinedPHIValue.ll
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llvm-svn: 6883
2003-06-24 20:29:52 +00:00
373086db75
Hopefully, the final fix for `[Pp]ropogate'.
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llvm-svn: 6251
2003-05-20 21:01:22 +00:00
b02697210e
Handle va_arg instruction correctly
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llvm-svn: 6030
2003-05-08 02:50:13 +00:00
3c98276168
Fix major problem with PHI node traversal: rechecking PHIs should go into
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the visit function. The worklist is for when their lattice value changes.
llvm-svn: 5927
2003-04-25 03:35:10 +00:00
cccc5c76c8
Minor non-functional changes:
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* Spell propagate right
* Improve performance of phi node handling
* Delete using directive
* Other minor changes
llvm-svn: 5920
2003-04-25 02:50:03 +00:00
889f620841
Remove unnecesary &*'s
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llvm-svn: 5872
2003-04-23 16:37:45 +00:00
669c6cf459
Make sure to _delete_ memory allocated by worklists
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llvm-svn: 4523
2002-11-04 02:54:22 +00:00
632df28deb
Fix spelling of `propagate'.
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llvm-svn: 4423
2002-10-29 23:06:16 +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
Chris Lattner