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151 Commits

Author SHA1 Message Date
Chris Lattner
7f9412b50d Fix bug: test/Regression/Transforms/SCCP/2002-05-21-InvalidSimplify.ll 
Improperly handling edges... by not marking them alive properly


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2707 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-05-22 16:07:20 +00:00
Chris Lattner
573527bd5d New CFG Simplification pass: removed from the old DCE pass 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2700 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-05-21 20:49:37 +00:00
Chris Lattner
618b4a11bb Fix bug: test/Regression/Transforms/SCCP/2002-05-20-MissedIncomingValue.ll 
That was causing a miscompilation of strtol/atoi plus others


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2669 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-05-20 20:48:03 +00:00
Chris Lattner
a36e6c8cd5 * Make debug output conditional on #define 
* 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 
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 
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 
"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
18fb2a6682 Implement elimination of loads 
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 
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 
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 
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. 
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
87fea85934 Initial checkin of the PiNodeInsertion pass 
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! 
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 
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)) 
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 
* 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 
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
ea54ab9cd2 Fix bug: test/Regression/Transforms/ADCE/2002-01-31-UseStuckAround.ll 
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 
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
c8cc4cb03b Updates to move some header files out of include/llvm/Transforms into 
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 
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 
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 
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
071d0ad2f1 * Convert InstWorkList to vector instead of set, because on big programs it 
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) 
* 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! 
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 
* 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 
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. 
* 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 
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 
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... 
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 
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: 
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 
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! 
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. :) 
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: 
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 
* 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 
* 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
a1be566213 * Add ability to eliminate a bunch of different cascading cast variations 
* Allow elimination of getelementptr X, uint 0 (which is a noop)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2428 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-05-02 17:06:02 +00:00
Chris Lattner
6c1ce21ee6 Add folding rules for mul X, 0 and mul X, 2 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2417 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-04-29 22:24:47 +00:00
Chris Lattner
0dbfc05a2a Significantly clean up SCCP pass. Now the two classes are merged and in 
an anonymous namespace where they belong.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2415 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-04-29 21:26:08 +00:00
Chris Lattner
f737121054 Range insertion now returns an iterator 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2414 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-04-29 21:25:34 +00:00
Chris Lattner
94cf3b1c67 Remove unused files: This is the old induction varaible cannonicalization 
pass built on top of interval analysis


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2411 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-04-29 20:18:00 +00:00
Chris Lattner
72a1d4e126 changes because iMemory.h no longer #includes DerivedTypes.h 
This only requires Type.h anyway


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2405 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-04-29 18:48:30 +00:00
Chris Lattner
c6f3ae5c66 Eliminate duplicate or unneccesary #include's 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2397 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-04-29 17:42:12 +00:00
Chris Lattner
8b054c0eb9 Remove broken assertion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2396 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-04-29 16:20:25 +00:00
Chris Lattner
96c466b06a Add new optional getPassName() virtual function that a Pass can override 
to make debugging output a lot nicer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2395 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-04-29 14:57:45 +00:00