Chris Lattner
a36e6c8cd5
* 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
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2637 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-16 04:37:07 +00:00
Chris Lattner
0f9fd5b0f8
* Fix bug: test/Regression/Transforms/GCSE/2002-05-14-OperandSwap.ll
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By making sure to consider binary expressions identical if their operands
are backwards, but swappable.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2629 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-14 19:57:25 +00:00
Chris Lattner
86c25fd556
Fix bug: test/Regression/Transforms/InstCombine/2002-05-14-SubFailure.ll
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2627 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-14 16:44:07 +00:00
Chris Lattner
b3bc8fa755
Fix bug: test/Regression/Transforms/InstCombine/2002-05-14-TouchDeletedInst.ll
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"This testcase caused instcombine to fail because it got the same instruction on
it's worklist more than once (which is ok), but then deleted the instruction.
Since the inst stayed on the worklist, as soon as it came back up to be
processed, bad things happened, and opt asserted."
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2623 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-14 15:24:07 +00:00
Chris Lattner
c99428f3c9
Fix a major source of "type unsafety", where a cast is neccesary, but can
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be put either before or after a load. We chose to cast the value loaded
instead of the pointer to load from.
Fixes bug: test/Regression/Transforms/LevelRaise/2002-05-10-LoadPeephole.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2621 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-14 05:23:45 +00:00
Chris Lattner
18fb2a6682
Implement elimination of loads
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2620 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-14 05:02:40 +00:00
Chris Lattner
2172db04e7
Trivial cleanups
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2617 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-13 22:04:46 +00:00
Chris Lattner
e0e734eea0
Initial checkin of LICM pass
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2615 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-10 22:44:58 +00:00
Chris Lattner
3dec1f2722
Add support for printing out statistics information when -stats is added to
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the command line
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2601 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-10 15:38:35 +00:00
Chris Lattner
55547274bc
Fix some bugs, straighten stuff out, more work needs to be done.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2600 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-10 15:37:35 +00:00
Chris Lattner
3c0193742a
* Add support for the -stats command line option to report how much is changed
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* Make cast-of-self-ty DCE the dead cast instruction immediately instead of
waiting for it to be DCE'd by another sweep over the function. This speeds
this up noticably.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2597 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-10 15:29:25 +00:00
Chris Lattner
87fea85934
Initial checkin of the PiNodeInsertion pass
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2593 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-10 05:41:34 +00:00
Chris Lattner
53a5b57737
Handle setcc <global*>, 0 instructions, Global pointers are never null!
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2582 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-09 20:11:54 +00:00
Chris Lattner
0aa7cd605d
Give the longer name to the instruction that will probably be eliminated later
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2581 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-09 20:11:23 +00:00
Chris Lattner
403717156b
Add ability to transform (x - (y - z)) into (x + (z - y))
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2566 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-09 01:29:19 +00:00
Chris Lattner
5c4afb9034
* Combine: A-(-B) -> A + B
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* Bugfix: A + -B and -A + B
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2561 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-08 22:46:53 +00:00
Chris Lattner
4fd56003ab
Initial checkin of expression reassociation pass
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2559 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-08 22:19:27 +00:00
Chris Lattner
8ca21c245c
Give the unified exit node a name
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2550 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 22:14:45 +00:00
Chris Lattner
ea54ab9cd2
Fix bug: test/Regression/Transforms/ADCE/2002-01-31-UseStuckAround.ll
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Cleanup code a lot
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2547 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 22:11:39 +00:00
Chris Lattner
022103b3f3
Merge all individual .h files into a single Scalar.h file
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2537 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 20:03:00 +00:00
Chris Lattner
a869b8dbd3
This doesn't use DCE!
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2536 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 20:02:44 +00:00
Chris Lattner
fc514f40a6
Move UnifyFunctionExitNodes to Utils library: final resting place this time
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2531 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 19:18:48 +00:00
Chris Lattner
65e96e57c5
fix comments and documentation in file
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2530 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 19:04:39 +00:00
Chris Lattner
ade686e79b
Split ChangeAllocations.cpp into Raise & LowerAllocations.cpp
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2529 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 19:02:48 +00:00
Chris Lattner
b444a1fff4
Cleanup implementation a bit
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2526 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 18:51:25 +00:00
Chris Lattner
c8cc4cb03b
Updates to move some header files out of include/llvm/Transforms into
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the Scalar and Utils subdirectories
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2523 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 18:36:35 +00:00
Chris Lattner
497c60c0ed
Reduce dependance on TransformInternals.h, instead using the TransformUtils library
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2518 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 18:12:18 +00:00
Chris Lattner
6d7491c3cc
Add #include no longer included by llvm/Transforms/Scalar/ConstantProp.h
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2517 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 18:11:30 +00:00
Chris Lattner
2ed01d8f0b
Factor code out to the TransformUtils library
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2516 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 18:10:55 +00:00
Chris Lattner
5a4337a8fc
Factor code out of TransformInternals into the Transform Utils library
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2515 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 18:09:15 +00:00
Chris Lattner
0ed2e4b554
Build Transforms Utils library
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2514 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 18:08:50 +00:00
Chris Lattner
4d1e46e7b0
Add code pulled out of TransformInternals.cpp, ConstProp.cpp, and DCE.cpp
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2513 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 18:07:59 +00:00
Chris Lattner
071d0ad2f1
* 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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2511 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 04:29:32 +00:00
Chris Lattner
92deeaf7a3
* Remove all cfg simplification stuff for a new cfg simplify pass (todo)
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* Convert to worklist instead of iterative algorithm
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2510 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-07 04:24:11 +00:00
Chris Lattner
d661937352
Only do masking for unsigned values!
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2504 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-06 18:54:59 +00:00
Chris Lattner
89df1b58a9
* 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!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2502 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-06 18:21:31 +00:00
Chris Lattner
473945d1dc
Handle X = phi Y --> X = Y
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2501 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-06 18:06:38 +00:00
Chris Lattner
f51825e3fb
* 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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2497 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-06 17:54:10 +00:00
Chris Lattner
dfe81ab87a
Clean up ADCE by removing extraneous wrapper class
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2494 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-06 17:27:57 +00:00
Chris Lattner
ed3a55005d
Combine not (not X) -> X
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2493 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-06 17:03:21 +00:00
Chris Lattner
b35dde1df4
Support more cases...
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2490 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-06 16:49:18 +00:00
Chris Lattner
3f5b877dd4
Add many more instruction combination simplifications
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2484 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-06 16:14:14 +00:00
Chris Lattner
cdac78b8a4
Merge blocks like this:
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void "test3"(bool %T) {
br bool %T, label %BB1, label %BB1
BB1:
ret void
}
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2472 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-06 03:02:02 +00:00
Chris Lattner
4c1061f58c
Implement constant propogation of shift instructions
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2471 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-06 03:01:37 +00:00
Chris Lattner
904ec289c2
Ok, really it only takes me 3 times to get this right!
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Now use #if 0 instead of #ifdef 0
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2448 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-02 21:49:50 +00:00
Chris Lattner
52a9a1def8
Oops, disable debugging code all the way. :)
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2447 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-02 21:47:40 +00:00
Chris Lattner
b9a6634466
* 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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2446 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-02 21:44:00 +00:00
Chris Lattner
59f0ce2a41
* 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
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2445 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-02 21:18:01 +00:00
Chris Lattner
0e9c515439
* 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
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2443 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-02 20:32:51 +00:00
Chris Lattner
872265ee1b
ExprTypeConvert will already do this transformation, no need to specialize
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it here.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2431 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-02 17:38:55 +00:00