bad1b4dfce
Fix some bugs, straighten stuff out, more work needs to be done.
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llvm-svn: 2600
2002-05-10 15:37:35 +00:00
014ee634ce
Initial checkin of the PiNodeInsertion pass
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llvm-svn: 2593
2002-05-10 05:41:34 +00:00
1fc23f382e
Handle setcc <global*>, 0 instructions, Global pointers are never null!
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llvm-svn: 2582
2002-05-09 20:11:54 +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
ad3c495225
Add ability to transform (x - (y - z)) into (x + (z - y))
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llvm-svn: 2566
2002-05-09 01:29:19 +00:00
147e975c43
* Combine: A-(-B) -> A + B
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* Bugfix: A + -B and -A + B
llvm-svn: 2561
2002-05-08 22:46:53 +00:00
c0f5800678
Initial checkin of expression reassociation pass
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llvm-svn: 2559
2002-05-08 22:19:27 +00:00
c1496bda61
Fix bug: test/Regression/Transforms/ADCE/2002-01-31-UseStuckAround.ll
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Cleanup code a lot
llvm-svn: 2547
2002-05-07 22:11:39 +00:00
b4cfa7ff97
Merge all individual .h files into a single Scalar.h file
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llvm-svn: 2537
2002-05-07 20:03:00 +00:00
77f791dd5b
Split ChangeAllocations.cpp into Raise & LowerAllocations.cpp
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llvm-svn: 2529
2002-05-07 19:02:48 +00:00
7608a46cbe
Updates to move some header files out of include/llvm/Transforms into
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the Scalar and Utils subdirectories
llvm-svn: 2523
2002-05-07 18:36:35 +00:00
9b55e5a2f4
Reduce dependance on TransformInternals.h, instead using the TransformUtils library
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llvm-svn: 2518
2002-05-07 18:12:18 +00:00
3d86d49604
Add #include no longer included by llvm/Transforms/Scalar/ConstantProp.h
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llvm-svn: 2517
2002-05-07 18:11:30 +00:00
560da70f8c
Factor code out to the TransformUtils library
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llvm-svn: 2516
2002-05-07 18:10:55 +00:00
d66a6e33e9
* Convert InstWorkList to vector instead of set, because on big programs it
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is empirically faster by a noticable margin, even though duplicates can
happen.
llvm-svn: 2511
2002-05-07 04:29:32 +00:00
87e8806f05
* Remove all cfg simplification stuff for a new cfg simplify pass (todo)
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* Convert to worklist instead of iterative algorithm
llvm-svn: 2510
2002-05-07 04:24:11 +00:00
a6e047a5d9
Only do masking for unsigned values!
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llvm-svn: 2504
2002-05-06 18:54:59 +00:00
e548507e8c
* Eliminate dead code that should have been removed in last revision
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* Convert main constant propogation pass to be worklist driven instead of
iterative.
* -constprop pass no longer "constant propogates" terminator instructions
- CFG is now preserved!
llvm-svn: 2502
2002-05-06 18:21:31 +00:00
bbbdd852b8
Handle X = phi Y --> X = Y
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llvm-svn: 2501
2002-05-06 18:06:38 +00:00
4c3366405a
* Use simplified interface to constant propogation stuff.
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* Remove dead PHI case (which could not work due to getNumOperands rather than
getNumIncomingValues. This really belongs in InstCombine, anyway so we'll
move it there.
llvm-svn: 2497
2002-05-06 17:54:10 +00:00
019f3649bd
Clean up ADCE by removing extraneous wrapper class
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llvm-svn: 2494
2002-05-06 17:27:57 +00:00
5d6bec5e26
Combine not (not X) -> X
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llvm-svn: 2493
2002-05-06 17:03:21 +00:00
9fa53de7e9
Support more cases...
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llvm-svn: 2490
2002-05-06 16:49:18 +00:00
f4cdbf34e5
Add many more instruction combination simplifications
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llvm-svn: 2484
2002-05-06 16:14:14 +00:00
66e25b8b62
Merge blocks like this:
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void "test3"(bool %T) {
br bool %T, label %BB1, label %BB1
BB1:
ret void
}
llvm-svn: 2472
2002-05-06 03:02:02 +00:00
940daedc22
Implement constant propogation of shift instructions
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llvm-svn: 2471
2002-05-06 03:01:37 +00:00
7b80b53ab9
Ok, really it only takes me 3 times to get this right!
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Now use #if 0 instead of #ifdef 0
llvm-svn: 2448
2002-05-02 21:49:50 +00:00
dd390e1736
Oops, disable debugging code all the way. :)
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llvm-svn: 2447
2002-05-02 21:47:40 +00:00
fe6c9eeae3
* Finish the implementation of isEdgeFeasible this fixes bug:
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test/Regression/Transforms/SCCP/2002-05-02-EdgeFailure.ll
* SCCP now preserves the CFG: It leaves conditional branches the way they
are in the program, not simplifying them. A seperate pass should eliminate
the potentially dead basic blocks and edges in the CFG.
llvm-svn: 2446
2002-05-02 21:44:00 +00:00
13b52e71d8
* Enable SCCP debugging to be turned on with a simple change of #define
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* Change worklist to a set so that duplicates cannot happen
* Add support for the invoke instruction
* Avoid marking store and free instructions as overdefined, since they
cannot produce a value anyway.
* Inline the OperandChangedState implementation
* Add isEdgeFeasible in preparation to fix a bug. Right now it behaves
exactly as before.
* Remove obsolete comment about constant pools
llvm-svn: 2445
2002-05-02 21:18:01 +00:00
5364d1a74a
* Simplify the code by not bothering to name the folded constant
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* Do not skip the instruction immediately after a folded instruction. This
was causing the testcase failure:
test/Regression/Transforms/SCCP/2002-05-02-MissSecondInst.ll
llvm-svn: 2443
2002-05-02 20:32:51 +00:00
48a44f7e23
* Add ability to eliminate a bunch of different cascading cast variations
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* Allow elimination of getelementptr X, uint 0 (which is a noop)
llvm-svn: 2428
2002-05-02 17:06:02 +00:00
31ba129cbe
Add folding rules for mul X, 0 and mul X, 2
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llvm-svn: 2417
2002-04-29 22:24:47 +00:00
7d3253876a
Significantly clean up SCCP pass. Now the two classes are merged and in
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an anonymous namespace where they belong.
llvm-svn: 2415
2002-04-29 21:26:08 +00:00
27eeecbb69
Range insertion now returns an iterator
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llvm-svn: 2414
2002-04-29 21:25:34 +00:00
09bbb5c015
Remove unused files: This is the old induction varaible cannonicalization
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pass built on top of interval analysis
llvm-svn: 2411
2002-04-29 20:18:00 +00:00
15e8f4c012
changes because iMemory.h no longer #includes DerivedTypes.h
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This only requires Type.h anyway
llvm-svn: 2405
2002-04-29 18:48:30 +00:00
d5a847057b
Eliminate duplicate or unneccesary #include's
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llvm-svn: 2397
2002-04-29 17:42:12 +00:00
2dfc667a7d
Remove broken assertion.
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llvm-svn: 2396
2002-04-29 16:20:25 +00:00
37104aace8
Add new optional getPassName() virtual function that a Pass can override
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to make debugging output a lot nicer.
llvm-svn: 2395
2002-04-29 14:57:45 +00:00
8d843f6b77
More cleanups
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llvm-svn: 2392
2002-04-29 01:58:47 +00:00
fc1a433dae
Code cleanups
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llvm-svn: 2391
2002-04-29 01:22:55 +00:00
f12cc842b3
Tighten up the AnalysisUsage of lots of passes, primarily to correctly indicate whether or not they invalidate the CFGA
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llvm-svn: 2386
2002-04-28 21:27:06 +00:00
ca14237696
Split ConstantVals.h into Constant.h and Constants.h
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llvm-svn: 2378
2002-04-28 19:55:58 +00:00
78dd56fe62
Eliminate the cfg namespace, moving LoopInfo, Dominators, Interval* classes
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to the global namespace
llvm-svn: 2370
2002-04-28 16:21:30 +00:00
1467f64f01
Initial checkin of simple&fast SSA based GCSE algorithm
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llvm-svn: 2338
2002-04-28 00:47:11 +00:00
c8e665431b
* Rename MethodPass class to FunctionPass
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- Rename runOnMethod to runOnFunction
* Transform getAnalysisUsageInfo into getAnalysisUsage
- Method is now const
- It now takes one AnalysisUsage object to fill in instead of 3 vectors
to fill in
- Pass's now specify which other passes they _preserve_ not which ones
they modify (be conservative!)
- A pass can specify that it preserves all analyses (because it never
modifies the underlying program)
* s/Method/Function/g in other random places as well
llvm-svn: 2333
2002-04-27 06:56:12 +00:00
66cfaf1da2
Changes because the Terminator::getSuccessor function now FAILS if successor
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IDX is out of range instead of returning null.
llvm-svn: 2332
2002-04-27 03:15:45 +00:00
2716b5e524
Change Constant::getNullConstant to Constant::getNullValue
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llvm-svn: 2323
2002-04-27 02:25:14 +00:00
260ab20422
Significantly rework InstructionCombining to work better and to be cleaner.
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We now use an InstVisitor to delegate to different cases that we are
interested in handling. We also fix the FIXME's by adding users to the
worklist when appropriate.
llvm-svn: 2292
2002-04-18 17:39:14 +00:00
Chris Lattner