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295 Commits

Author SHA1 Message Date
Chris Lattner
c4d10ebcd7 Implement combination of boolean not with branch 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6599 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-04 04:46:00 +00:00
Chris Lattner
074d84c746 Implement xform: (X != 0) -> (bool)X 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6506 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-01 03:35:25 +00:00
Chris Lattner
b37923f9a1 Okay totally give up on trying to optimize aggregates that cannot be completely 
broken up into their elements.  Too many programs break because of this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6440 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-30 19:22:14 +00:00
Chris Lattner
26d2ca1d13 add a check that allows the SRoA pass to avoid breaking programs, even if their 
behavior is technically undefined


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6438 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-30 18:09:57 +00:00
Chris Lattner
261d686737 Fix bug: ScalarRepl/2003-05-30-MultiLevel.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6428 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-30 05:26:30 +00:00
Chris Lattner
5e062a1eda Fix bug: ScalarRepl/2003-05-29-ArrayFail.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6425 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-30 04:15:41 +00:00
Chris Lattner
faf4cc2da0 Add comment 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6415 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-29 20:26:30 +00:00
Chris Lattner
2a9c847f25 Fix bug: Instcombine/2003-05-27-ConstExprCrash.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6352 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-27 16:40:51 +00:00
Chris Lattner
d10376bee5 * Actually USE the statistic that we made 
* Implement SRoA for arrays


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6349 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-27 16:09:27 +00:00
Chris Lattner
ed7b41ea90 Implementation of the simple "scalar replacement of aggregates" transformation 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6346 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-27 15:45:27 +00:00
Chris Lattner
bd4ecf769d Fix bug: InstCombine/2003-05-26-CastMiscompile.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6338 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-26 23:41:32 +00:00
Chris Lattner
de579f11ff Remove using declarations 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6306 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-22 22:00:07 +00:00
Chris Lattner
c54e2b8f84 Minor cleanups. 
This hunk:
-    } else if (Src->getNumOperands() == 2 && Src->use_size() == 1) {
+    } else if (Src->getNumOperands() == 2) {

Allows GEP folding to be more aggressive, which reduces the number of instructions
and can dramatically speed up BasicAA in some cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6286 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-22 19:07:21 +00:00
Misha Brukman
82c89b9f3a Hopefully, the final fix for `[Pp]ropogate'. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6251 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-20 21:01:22 +00:00
Misha Brukman
f117cc9ee6 s/convertable/convertible/g 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6248 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-20 18:45:36 +00:00
Chris Lattner
1d16ec7381 Handle va_arg instruction correctly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6030 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-08 02:50:13 +00:00
Chris Lattner
e96fda3002 Fix spelling 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5983 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-05-02 19:26:34 +00:00
Chris Lattner
3f2ec3925f Fix another case where constexprs could cause a crash 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5972 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-04-30 22:34:06 +00:00
Chris Lattner
fe32e0c578 Fix constant folding of constexprs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5971 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-04-30 22:19:10 +00:00
Chris Lattner
619f825640 Fix bug: ADCE/2003-04-25-PHIPostDominateProblem.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5952 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-04-25 22:53:27 +00:00
Chris Lattner
bceb2b0061 Fix major problem with PHI node traversal: rechecking PHIs should go into 
the visit function.  The worklist is for when their lattice value changes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5927 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-04-25 03:35:10 +00:00
Chris Lattner
9de28289f8 Minor non-functional changes: 
* Spell propagate right
  * Improve performance of phi node handling
  * Delete using directive
  * Other minor changes


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5920 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-04-25 02:50:03 +00:00
Chris Lattner
e408e25132 Remove unnecesary &*'s 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5872 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-04-23 16:37:45 +00:00
Chris Lattner
fb242b6edc Change the interface to constant expressions to allow automatic folding 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5793 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-04-16 22:40:51 +00:00
Chris Lattner
e941291a7a Initial checkin of PRE on LLVM. This implementation is still lacking in 
several ways:

 * Load expressions are not PRE'd well.  Alias Analysis should be used to
   get accurate information when computing anticipatibility.
 * The expression collection implementation does not handle PHI nodes properly,
   thus the implementation misses many opportunities to PRE.
 * This code could be sped up quite a bit

Despite these flaws, the code seems to work well, and handles PR's as one
would expect.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5759 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-31 19:55:43 +00:00
Chris Lattner
c277eaa41e Move BreakCriticalEdges pass to lib/Transforms/Utils 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5754 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-21 21:43:19 +00:00
Chris Lattner
c8802d2c16 Add the following instcombine xforms: 
- Implement simple reassociation: (A|c1)|(B|c2) == (A|B)|(c1|c2)
  - (A & C1)+(B & C2) -> (A & C1)|(B & C2) iff C1&C2 == 0
  - (A & C1)^(B & C2) -> (A & C1)|(B & C2) iff C1&C2 == 0


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5743 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-11 00:12:48 +00:00
Chris Lattner
a4f445b28c Implement: -A*-B == A*B 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5740 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-10 23:23:04 +00:00
Chris Lattner
a27231acc0 Add new transformation: // (~A | ~B) == (~(A & B)) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5738 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-10 23:13:59 +00:00
Chris Lattner
8d96964e29 Generalize not and neg comparison testers to allow constant to be considered not'able and neg'able. This 
allows optimization of this:
int %test4(int %A, int %B) {
        %a = xor int %A, -1
        %c = and int %a, 5    ; 5 = ~c2
        %d = xor int %c, -1
        ret int %d
}

into this:
int %test4(int %A, int %B) {            ; No predecessors!
        %c.demorgan = or int %A, -6             ; <int> [#uses=1]
        ret int %c.demorgan
}


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5736 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-10 23:06:50 +00:00
Chris Lattner
4f98c56936 Generalize (A+c1)+c2 optimization to work with all associative operators 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5733 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-10 21:43:22 +00:00
Chris Lattner
28ba1aad99 Minor change, no functionality diff 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5731 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-10 19:20:30 +00:00
Chris Lattner
ea34005404 Fix bug: (x << 100) wasn't folded to 0, but (x >> 100) was (when x is unsigned) 
Implement new shift optimizations for shifting the result of a shift.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5729 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-10 19:16:08 +00:00
Chris Lattner
cb40a3749a Implement: (A|B)^B == A & (~B) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5728 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-10 18:24:17 +00:00
Chris Lattner
decd0812ec Implement %test7 in InstCombine/getelementptr.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5704 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-05 22:33:14 +00:00
Chris Lattner
0252e49f6d Convert LICM over to use AliasSetTracker. Besides being nicer, this automatically 
allows LICM to use access sizes to help alias analysis be more precise.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5693 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-03 23:32:45 +00:00
Chris Lattner
fb743a937f Change the mem2reg interface to accept a TargetData argument 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5685 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-03-03 17:25:18 +00:00
Chris Lattner
caadc93f7b Fix bug: LICM/2003-02-28-PromoteDifferentType.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5675 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-02-28 19:21:40 +00:00
Chris Lattner
8601a9bf54 Fix bug: 2003-02-27-StoreSinkPHIs.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5658 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-02-27 21:59:36 +00:00
Chris Lattner
2d0a4a4eb8 Convert to work with new AliasAnalysis interface by conservatively assuming all pointers are arbitrarily large accesses 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5636 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-02-26 19:28:57 +00:00
Chris Lattner
f0a93ed9c5 Rename Instruction::hasSideEffects() -> mayWriteToMemory() 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5620 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-02-24 20:48:32 +00:00
Chris Lattner
2e6e741b73 Initial implementation of Loop invariant memory->scalar promotion 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5613 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-02-24 03:52:32 +00:00
Chris Lattner
ad3448c917 4 new transformations: 
* X*C + X --> X * (C+1)
  * X + X*C --> X * (C+1)
  * X - X*C --> X * (1-C)
  * X*C - X --> X * (C-1)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5592 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-02-18 19:57:07 +00:00
Chris Lattner
a2881961b9 Add a variety of new transformations: 
* A & ~A == 0
  * A / (2^c) == A >> c  if unsigned
  * 0 / A == 0
  * 1.0 * A == A
  * A * (2^c) == A << c
  * A ^ ~A == -1
  * A | ~A == -1
  * 0 % X = 0
  * A % (2^c) == A & (c-1) if unsigned
  * A - (A & B) == A & ~B
  * -1 - A == ~A


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5587 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-02-18 19:28:33 +00:00
Chris Lattner
bac74584f1 Fix typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5458 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-02-01 04:50:59 +00:00
Chris Lattner
d7f268d418 Fix bug: ADCE/2003-01-22-PredecessorProblem.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5405 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-01-23 02:12:18 +00:00
Chris Lattner
4d0a82da2d Fix a huge performance problem in reassociate by introducing a 
rank map cache for instruction ranks


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5030 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 03:56:00 +00:00
Chris Lattner
680f0c283d Minor changes: 
* 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5029 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 03:49:50 +00:00
Chris Lattner
342d1826fb Remove dead code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4952 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-07 18:42:13 +00:00
Chris Lattner
c736d56562 Fix bug: 2002-12-05-MissedConstProp.ll pointed out by Casey Carter 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4935 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-05 22:41:53 +00:00