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1876 Commits

Author SHA1 Message Date
Matthijs Kooijman
544c9b2fb0 Make the InsertBefore argument to FindInsertedValue optional, so you can find an inserted value without modifying the code. 
llvm-svn: 52319
 2008-06-16 13:28:31 +00:00
Matthijs Kooijman
238b1e8d69 Pass around Instruction* instead of Instruction& in FindInsertedValue and friends. 
llvm-svn: 52318
 2008-06-16 13:13:08 +00:00
Matthijs Kooijman
dedcf00fcc 80 column fixes. 
llvm-svn: 52316
 2008-06-16 12:57:37 +00:00
Matthijs Kooijman
1dd7d9cdc1 Move FindScalarValue from InstructionCombining.cpp to ValueTracking.cpp. While 
I'm at it, rename it to FindInsertedValue.

The only functional change is that newly created instructions are no longer
added to instcombine's worklist, but that is not really necessary anyway (and
I'll commit some improvements next that will completely remove the need).

llvm-svn: 52315
 2008-06-16 12:48:21 +00:00
Chris Lattner
0bc9e4aa8f simplify some code by using a helper function. This really really 
wants a 'nocapture' predicate.

llvm-svn: 52304
 2008-06-16 06:38:26 +00:00
Chris Lattner
35be1f6c83 move a bunch of predicates up into their own section 
in this file, no other changes.

llvm-svn: 52303
 2008-06-16 06:30:22 +00:00
Chris Lattner
12453dd555 Other parts of this code treat noalias arguments as objects for 
the purposes of escape analysis.

llvm-svn: 52302
 2008-06-16 06:28:01 +00:00
Chris Lattner
e987a3bdd1 If we are checking to see if the result of a call aliases a 
pointer derived from a local allocation, if the local allocation
never escapes, the pointers can't alias.  This implements PR2436

llvm-svn: 52301
 2008-06-16 06:19:11 +00:00
Chris Lattner
4e38446b34 Refactor basicaa's main alias function somethin' fierce. 
This fixes several minor bugs (such as returning noalias
for comparisons between external weak functions an null) but
is mostly a cleanup.

llvm-svn: 52299
 2008-06-16 06:10:11 +00:00
Wojciech Matyjewicz
58f5cc8864 Fix PR2434. When scanning for exising binary operator to reuse don't 
take into account the instrucion pointed by InsertPt. Thanks to it, 
returning the new value of InsertPt to the InsertBinop() caller can be 
avoided. The bug was, actually, in visitAddRecExpr() method which wasn't 
correctly handling changes of InsertPt. There shouldn't be any 
performance regression, as -gvn pass (run after -indvars) removes any 
redundant binops.

llvm-svn: 52291
 2008-06-15 19:07:39 +00:00
Wojciech Matyjewicz
f66a7fe9de Change 'while' loop to 'do' loop. 
Add a safety measure. It isn't safe to assume in ScalarEvolutionExpander that
all loops are in canonical form (but it should be safe for loops that have
AddRecs).
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llvm-svn: 52275
 2008-06-14 16:48:22 +00:00
Nick Lewycky
0aa53f2b52 Crash less. The i64 restriction in BinomialCoefficient caused some problems 
with code that was expecting different bit widths for different values.

Make getTruncateOrZeroExtend a method on ScalarEvolution, and use it.

llvm-svn: 52248
 2008-06-13 04:38:55 +00:00
Chris Lattner
67a5a4eba8 Expose a public interface to this pass. 
llvm-svn: 52029
 2008-06-05 23:45:18 +00:00
Chris Lattner
ea07bf8c1b Let libcall semantics decide whether it knows about functions 
with definitions or not.

llvm-svn: 52028
 2008-06-05 23:38:34 +00:00
Matthijs Kooijman
1fd76cd396 Update comments and documentation to reflect that GCSE and ValueNumbering are 
deprecated by the GVN and GVNPRE passes.

llvm-svn: 51983
 2008-06-05 07:55:49 +00:00
Matthijs Kooijman
a03f85df05 Replace two manual loops with calls to CallSite::hasArguments (no functional changes). 
llvm-svn: 51947
 2008-06-04 16:57:50 +00:00
Chris Lattner
5839247e92 Add #includes required by GCC 4.3, thanks for Zhongxing Xu 
for reporting this.

llvm-svn: 51926
 2008-06-04 04:46:14 +00:00
Chris Lattner
3e1cd5c9bf Remove unneeded code I added. 
llvm-svn: 51878
 2008-06-02 18:39:07 +00:00
Wojciech Matyjewicz
06e4c8a420 Fixes PR2395. Looking for a constant in a GEP tail (when the first GEP 
is longer than the second one) should stop after finding one. Added break 
instruction guarantees it. It also changes difference between offsets to 
absolute value of this difference in the condition.

llvm-svn: 51875
 2008-06-02 17:26:12 +00:00
Chris Lattner
ea60f0ccc3 move CannotBeNegativeZero to ValueTracking. Simplify some signbit comparisons. 
llvm-svn: 51864
 2008-06-02 01:29:46 +00:00
Chris Lattner
4960857273 move ComputeMaskedBits, MaskedValueIsZero, and ComputeNumSignBits 
out of instcombine into a new file in libanalysis.  This also teaches
ComputeNumSignBits about the number of sign bits in a constantint.

llvm-svn: 51863
 2008-06-02 01:18:21 +00:00
Owen Anderson
ee111c28b8 Remember to update the reverse non-local cache when cleaning up dirty entries. This fixes PR2397. 
llvm-svn: 51846
 2008-06-01 21:03:52 +00:00
Owen Anderson
67a1d5ec35 Make ping more aggressive in finding nonlocal caching errors. 
llvm-svn: 51845
 2008-06-01 20:51:41 +00:00
Dan Gohman
15eb8b47aa Fix a typo in a comment. 
llvm-svn: 51718
 2008-05-30 00:08:18 +00:00
Dan Gohman
24ad4a21e3 Fix a copy+paste error in a comment. 
llvm-svn: 51717
 2008-05-30 00:02:02 +00:00
Owen Anderson
0eabbbfc58 Add newline at end of file. 
llvm-svn: 51701
 2008-05-29 21:05:16 +00:00
Owen Anderson
0e26c5897a Force postdom to be linked into opt and bugpoint, even though it is no longer used by any passes. 
llvm-svn: 51686
 2008-05-29 17:00:13 +00:00
Gabor Greif
39350bab39 convert another operand loop to iterator formulation 
llvm-svn: 51661
 2008-05-29 00:51:08 +00:00
Dan Gohman
4b11213552 Use Function::getEntryBlock instead of Function::begin, for clarity. 
llvm-svn: 51613
 2008-05-27 20:55:29 +00:00
Dan Gohman
327d2c6167 Print debug output when any edge becomes executable, including 
the first visited edge.

llvm-svn: 51612
 2008-05-27 20:47:30 +00:00
Duncan Sands
4757a8dd76 Fix some constructs that gcc-4.4 warns about. 
llvm-svn: 51591
 2008-05-27 11:50:51 +00:00
Nick Lewycky
f24743a6bb Don't treat values as signed when looking at loop steppings in HowForToNonZero. 
llvm-svn: 51560
 2008-05-25 23:43:32 +00:00
Nick Lewycky
744dad8004 "ret (constexpr)" can't be folded into a Constant. Add a method to 
Analysis/ConstantFolding to fold ConstantExpr's, then make instcombine use it
to try to use targetdata to fold constant expressions on void instructions.

Also extend the icmp(inttoptr, inttoptr) folding to handle the case where
int size != ptr size.

llvm-svn: 51559
 2008-05-25 20:56:15 +00:00
Dan Gohman
f25b89f697 Use isSingleValueType instead of isFirstClassType to 
exclude struct and array types.

llvm-svn: 51452
 2008-05-22 23:43:22 +00:00
Gabor Greif
0c41f351cc transform more loops to iterator form, detabify 
llvm-svn: 51436
 2008-05-22 19:24:54 +00:00
Gabor Greif
0c8b237857 Rewrite operand loops to use iterators. This shrinks .o file (at gcc4.0.1 -O3 x86) substantially (>500 bytes). Reason still unknown. 
llvm-svn: 51423
 2008-05-22 06:43:33 +00:00
Chris Lattner
5a09a5fb88 Free and vaarg are not really volatile. 
llvm-svn: 51407
 2008-05-22 03:23:06 +00:00
Gabor Greif
aa0a5c230c suppress gcc3.4.6's <no value returned> warnings 
llvm-svn: 51372
 2008-05-21 14:07:30 +00:00
Chris Lattner
821dc30131 Fix PR2346 by marking vaarg as volatile so that licm doesn't try to 
hoist them.

llvm-svn: 51356
 2008-05-20 22:05:28 +00:00
Chris Lattner
5c3ce73720 Add a bool to isEdgeFeasible that tells it whether to treat unknown 
value as undef or untracked.

llvm-svn: 51295
 2008-05-20 03:39:39 +00:00
Gabor Greif
d61f20217a API change for {BinaryOperator|CmpInst|CastInst}::create*() --> Create. Legacy interfaces will be in place for some time. (Merge from use-diet branch.) 
llvm-svn: 51200
 2008-05-16 19:29:10 +00:00
Dan Gohman
48ac9aec33 Use static and anonymous namespaces consistently with other passes. 
llvm-svn: 51156
 2008-05-15 19:43:55 +00:00
Owen Anderson
5e6431c140 Fix memdep's handling of invokes when finding the dependency of another call 
instruction.  This fixes some Ada miscompiles reported in PR2324.

llvm-svn: 51069
 2008-05-13 21:25:37 +00:00
Dan Gohman
bab18cae46 Clean up the use of static and anonymous namespaces. This turned up 
several things that were neither in an anonymous namespace nor static
but not intended to be global.

llvm-svn: 51017
 2008-05-13 00:00:25 +00:00
Chris Lattner
0eb3dfb3b0 prune #includes. 
llvm-svn: 50962
 2008-05-12 01:13:53 +00:00
Chris Lattner
f459fcde61 Add a new SparsePropagation analysis utility, which allows you to do 
SCCP like sparse lattice analysis with relative ease.  Just pick your
lattice function and implement the transfer function and you're good.
Just make sure you don't break monotonicity ;-)

llvm-svn: 50961
 2008-05-12 01:12:24 +00:00
Torok Edwin
9b85a8dc92 put LibCallAliasAnalysis into anonymous namespace to avoid 
clashes on ::X

llvm-svn: 50912
 2008-05-09 20:35:45 +00:00
Chris Lattner
dfd5ee9b42 Remove dead return. Thanks to Bill for the review! 
llvm-svn: 50863
 2008-05-08 18:26:56 +00:00
Chris Lattner
9011ceba89 Add support for constant folding the 'offsetof' pattern even if the 
base is not zero.  This fixes test/C++Frontend/2008-05-07-CrazyOffsetOf.cpp

llvm-svn: 50840
 2008-05-08 04:54:43 +00:00
Chris Lattner
3ee18d7c51 Add a new LibCallAliasAnalysis pass, which is parameterized 
by an instance of LibCallInfo to provide mod/ref info of
standard library functions.  This is powerful enough to
say that 'sqrt' is readonly except that it modifies errno,
or that "printf doesn't store to memory unless the %n
constraint is present" etc.

llvm-svn: 50827
 2008-05-07 19:53:05 +00:00