Chris Lattner
5045ab0fac
Fix another case where constexprs could cause a crash
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llvm-svn: 5972
2003-04-30 22:34:06 +00:00
Chris Lattner
caa766b40f
Fix constant folding of constexprs
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llvm-svn: 5971
2003-04-30 22:19:10 +00:00
Chris Lattner
bb00f755ed
Change the interface to constant expressions to allow automatic folding
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llvm-svn: 5793
2003-04-16 22:40:51 +00:00
Chris Lattner
c51d7871ee
Add the following instcombine xforms:
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- 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
llvm-svn: 5743
2003-03-11 00:12:48 +00:00
Chris Lattner
6eededc41f
Implement: -A*-B == A*B
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llvm-svn: 5740
2003-03-10 23:23:04 +00:00
Chris Lattner
715b592fc4
Add new transformation: // (~A | ~B) == (~(A & B))
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llvm-svn: 5738
2003-03-10 23:13:59 +00:00
Chris Lattner
0f5ab645eb
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
}
llvm-svn: 5736
2003-03-10 23:06:50 +00:00
Chris Lattner
3eca9aaa0a
Generalize (A+c1)+c2 optimization to work with all associative operators
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llvm-svn: 5733
2003-03-10 21:43:22 +00:00
Chris Lattner
9dec4368c0
Minor change, no functionality diff
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llvm-svn: 5731
2003-03-10 19:20:30 +00:00
Chris Lattner
5fbfe9b9a8
Fix bug: (x << 100) wasn't folded to 0, but (x >> 100) was (when x is unsigned)
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Implement new shift optimizations for shifting the result of a shift.
llvm-svn: 5729
2003-03-10 19:16:08 +00:00
Chris Lattner
5e6fb8b8d5
Implement: (A|B)^B == A & (~B)
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llvm-svn: 5728
2003-03-10 18:24:17 +00:00
Chris Lattner
bd009a8938
Implement %test7 in InstCombine/getelementptr.ll
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llvm-svn: 5704
2003-03-05 22:33:14 +00:00
Chris Lattner
c24ffa9297
4 new transformations:
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* X*C + X --> X * (C+1)
* X + X*C --> X * (C+1)
* X - X*C --> X * (1-C)
* X*C - X --> X * (C-1)
llvm-svn: 5592
2003-02-18 19:57:07 +00:00
Chris Lattner
8306cc5c5c
Add a variety of new transformations:
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* 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
llvm-svn: 5587
2003-02-18 19:28:33 +00:00
Chris Lattner
6c9d57c590
Fix bug: 2002-12-05-MissedConstProp.ll pointed out by Casey Carter
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llvm-svn: 4935
2002-12-05 22:41:53 +00:00
Chris Lattner
0141841bc4
Fix warning
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llvm-svn: 4649
2002-11-09 00:49:43 +00:00
Chris Lattner
aaf2fa34a5
Instcombine this away:
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%A = getelementptr [4 x int]* %M, long 0, long 0
%B = getelementptr int* %A, long 2
llvm-svn: 4536
2002-11-04 16:43:32 +00:00
Chris Lattner
ecddf3396f
Add a transformation to turn:
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malloc Ty, C
int
malloc [C x Ty], 1
llvm-svn: 4534
2002-11-04 16:18:53 +00:00
Misha Brukman
c9c721edf0
Fix spelling of `propagate'.
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llvm-svn: 4423
2002-10-29 23:06:16 +00:00
Chris Lattner
b565d3ac5b
- 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
b32252aa71
It is illegal for PHI nodes to have zero values, delete the code to handle them
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llvm-svn: 4071
2002-10-08 17:07:39 +00:00
Chris Lattner
55c7ae3cdc
Fold ashr -1, X into -1
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llvm-svn: 4070
2002-10-08 16:16:40 +00:00
Chris Lattner
7cf9f6f4b1
Updates to work with recent Statistic's changes:
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* Renamed StatisticReporter.h/cpp to Statistic.h/cpp
* Broke constructor to take two const char * arguments instead of one, so
that indendation can be taken care of automatically.
* Sort the list by pass name when printing
* Make sure to print all statistics as a group, instead of randomly when
the statistics dtors are called.
* Updated ProgrammersManual with new semantics.
llvm-svn: 4002
2002-10-01 22:38:41 +00:00
Chris Lattner
b6c408778a
Optimize away cases like:
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%cast109 = cast uint %cast212 to short ; <short> [#uses=1]
%cast214 = cast short %cast109 to uint ; <uint> [#uses=1]
%cast215 = cast uint %cast214 to short ; <short> [#uses=1]
llvm-svn: 3897
2002-09-23 23:39:43 +00:00
Chris Lattner
5ccb21f41d
Fix bug: test/Regression/Transforms/InstCombine/2002-09-17-GetElementPtrCrash.ll
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Thanks to Casey for finding it!
llvm-svn: 3783
2002-09-17 21:05:42 +00:00
Chris Lattner
fb017cb38c
- Change getelementptr instruction to use long indexes instead of uint
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indexes for sequential types.
llvm-svn: 3682
2002-09-11 01:21:33 +00:00
Chris Lattner
5143d4a3b3
Add cannonicalization of shl X, 1 -> add X, X
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llvm-svn: 3671
2002-09-10 23:04:09 +00:00
Chris Lattner
4f5abce7f6
Hack unneccesary now that shifts of pointers are no longer legal!
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llvm-svn: 3640
2002-09-10 03:50:54 +00:00
Chris Lattner
c1de581f8e
Fix Bug: test/Regression/Transforms/InstCombine/2002-09-08-PointerShiftBug.ll
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llvm-svn: 3626
2002-09-08 21:39:07 +00:00
Chris Lattner
3ce5b343c5
- Renamed Type::isIntegral() to Type::isInteger()
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- Added new method Type::isIntegral() that is the same as isInteger, but
also accepts bool.
llvm-svn: 3574
2002-09-03 01:08:28 +00:00
Chris Lattner
cd49f0ec5d
Add constant prop & DIE to InstCombine, so it cleans up after itself
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llvm-svn: 3568
2002-09-02 04:59:56 +00:00
Chris Lattner
66b1127636
- instcombine demorgan's law: and (not A), (not B) == not (or A, B)
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llvm-svn: 3495
2002-08-23 18:32:43 +00:00
Chris Lattner
18826b07fe
Instcombine PHI's of the form %PN = phi PN, X into X and
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%PN = phi PN, PN, PN into 0 (because the phi must not be reachable)
llvm-svn: 3470
2002-08-22 20:22:01 +00:00
Chris Lattner
ad92b604b5
- instcombine (~(a < b)) into (a >= b)
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llvm-svn: 3406
2002-08-20 18:24:26 +00:00
Chris Lattner
22116975ce
- implemented instcombine of phi (X, X, X) -> X
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llvm-svn: 3397
2002-08-20 15:35:35 +00:00
Chris Lattner
04d2780d12
Promote getelementptr instructions to constexprs if we can.
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llvm-svn: 3368
2002-08-17 22:21:59 +00:00
Chris Lattner
caaca8d4c9
Handle more cases of cast-of-cast in more general forms.
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llvm-svn: 3347
2002-08-15 16:15:25 +00:00
Chris Lattner
83f92a7237
Implement capability to fold this:
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uint %test4(int %A, int %B) {
%COND = setlt int %A, %B ; <bool> [#uses=1]
%result = cast bool %COND to uint ; <uint> [#uses=1]
ret uint %result
}
into a single cast instruction.
llvm-svn: 3339
2002-08-14 23:21:10 +00:00
Chris Lattner
890adeb7a2
- Fix InstCombine pass to not generate or process NOT instructions
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- Fixed testcases to not use them either.
llvm-svn: 3315
2002-08-14 17:51:49 +00:00
Chris Lattner
b6a04772b5
- Rename ConstantGenericIntegral -> ConstantIntegral
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llvm-svn: 3300
2002-08-13 17:50:24 +00:00
Chris Lattner
a6ba1b74ac
* Factor a bunch of code by using ReplaceInstUsesWith
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* Move isMaxValue, isMinValue, isAllOnesValue to Constants.h
llvm-svn: 3290
2002-08-12 21:17:25 +00:00
Chris Lattner
0a51808266
New functionality for instcombine:
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* New ReplaceInstUsesWith function to factor out tons of common code
This needs to be used more in the future still, but it's a good start
* New InsertNewInstBefore to allow multi-instruction replacements
* Change getMaxValue functions to isAllOnesValue function, which doesn't
have to CREATE/lookup a new constant. Also the name is accurate
* Add new isMaxValue, isMinValue, isMaxValueMinusOne, isMinValuePlusOne
functions: This should be moved to Constant* classes eventually
* Implement xor X, ALLONES -> not X
* Fold ALL setcc's of booleans away
* Handle various SetCC's for integers against values at the end of their
ranges, possibly off by one. This implements the setcc-strength-reduce.ll
testcase.
llvm-svn: 3286
2002-08-09 23:47:40 +00:00
Chris Lattner
c840f0ec2a
Fix bug: test/Regression/Transforms/InstCombine/2002-08-02-CastTest.ll
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Implement feature: Cast's can now be converted to bitwise AND expressions.
llvm-svn: 3225
2002-08-02 20:00:25 +00:00
Chris Lattner
5d9be21256
* Cleanups of instcombine
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- Reenable gep (gep x) -> x
- Make instcombine do dead instruction elimination where it's really
easy. Now visitors don't have to ensure they aren't not processing
dead instructions.
llvm-svn: 3222
2002-08-02 19:29:35 +00:00
Chris Lattner
7a9eb848cd
* Add support for different "PassType's"
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* Add new RegisterOpt/RegisterAnalysis templates for registering passes that
are to show up in opt or analyze
* Register Analyses now
* Change optimizations to use RegisterOpt instead of RegisterPass
* Add support for different "PassType's"
* Add new RegisterOpt/RegisterAnalysis templates for registering passes that
are to show up in opt or analyze
* Register Analyses now
* Change optimizations to use RegisterOpt instead of RegisterPass
* Remove getPassName implementations from various subclasses
llvm-svn: 3113
2002-07-26 21:12:46 +00:00
Chris Lattner
c482880f9e
*** empty log message ***
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llvm-svn: 3016
2002-07-23 18:06:35 +00:00
Chris Lattner
83577a047e
Disable folding g-e-p instructions into loads and stores.
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llvm-svn: 2870
2002-07-10 22:37:17 +00:00
Chris Lattner
dfd421a7df
MEGAPATCH checkin.
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For details, See: docs/2002-06-25-MegaPatchInfo.txt
llvm-svn: 2779
2002-06-25 16:13:24 +00:00
Chris Lattner
9dde5c9df7
Fold add X, 0 for floating point types as well
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llvm-svn: 2734
2002-05-23 17:11:38 +00:00
Chris Lattner
8106c7a841
Fix bug: test/Regression/Transforms/InstCombine/2002-05-14-SubFailure.ll
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llvm-svn: 2627
2002-05-14 16:44:07 +00:00