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3620 Commits

Author SHA1 Message Date
Chris Lattner
f8b22a3568 refactor some code to shrink PromoteMem2Reg::run a bit 
llvm-svn: 40805
 2007-08-04 01:41:18 +00:00
Chris Lattner
2d4d557c80 add a typedef, no other change. 
llvm-svn: 40804
 2007-08-04 01:19:38 +00:00
Chris Lattner
65181deba3 avoid an unneeded vector copy. This speeds up mem2reg on the testcase 
in PR1432 by 6%

llvm-svn: 40803
 2007-08-04 01:07:49 +00:00
Chris Lattner
34cf111957 make RenamePassWorkList a local var instead of an ivar. 
llvm-svn: 40802
 2007-08-04 01:04:40 +00:00
Owen Anderson
891f5b4d28 Fix a subtle miscompilation. This allows 197.parser to be compiled correctly. 
llvm-svn: 40791
 2007-08-03 19:59:35 +00:00
Owen Anderson
d1063b7a3c Fix a subtle iterator invalidation bug in a recursive algorithm. 
llvm-svn: 40776
 2007-08-03 11:03:26 +00:00
Chris Lattner
cf6dd53ad8 Fix an accidental commit. 
llvm-svn: 40758
 2007-08-02 21:33:36 +00:00
Owen Anderson
414247c075 Fix 80 col. violations. 
llvm-svn: 40751
 2007-08-02 18:20:52 +00:00
Owen Anderson
ad74eeed3d Fix 80 col. violations. 
llvm-svn: 40750
 2007-08-02 18:16:06 +00:00
Owen Anderson
ae769ac824 Fix 80 col. violations. 
llvm-svn: 40749
 2007-08-02 18:11:11 +00:00
Owen Anderson
d617e4c963 Fix a bug that was causing several miscompilations on SPEC. 
llvm-svn: 40746
 2007-08-02 17:56:05 +00:00
Chris Lattner
5ca7348fc4 Replacing a cast with another one does not reduce the number of 
casts in the input.

llvm-svn: 40741
 2007-08-02 17:23:38 +00:00
Chris Lattner
7c6e8f735f Disable an xform that causes an infinite loop. This fixes PR1594 
llvm-svn: 40739
 2007-08-02 16:56:32 +00:00
Chris Lattner
25a8bfdedb wrap some long lines. Major offenders that are left include 
gvn, gvnpre, dse, and predsimplify.  To see these, use:

  make check-line-length

llvm-svn: 40738
 2007-08-02 16:53:43 +00:00
Devang Patel
937b07fb5e Update dominator info for the middle blocks created while spliting 
exit edge to preserve LCSSA.

Fix dominance frontier update during loop unswitch. This fixes PR 1589, again

llvm-svn: 40737
 2007-08-02 15:25:57 +00:00
Chris Lattner
0111f62050 Enhance instcombine to be more aggressive about folding casts of 
operations of casts.  This implements InstCombine/zext-fold.ll

llvm-svn: 40726
 2007-08-02 06:11:14 +00:00
Chris Lattner
2cacb6cc56 Fix PR1575 and test/Transforms/CondProp/2007-08-01-InvalidRead.ll 
llvm-svn: 40720
 2007-08-02 04:47:05 +00:00
Devang Patel
f21f509c2c Undo previous check-in. 
llvm-svn: 40698
 2007-08-01 23:24:50 +00:00
Devang Patel
51c61e730a Update dominator info for the middle blocks created while spliting 
exit edge to preserve LCSSA.

Fix dominance frontier update during loop unswitch. This fixes PR 1589.

llvm-svn: 40695
 2007-08-01 22:23:50 +00:00
Owen Anderson
7028dfaf9d Make non-local memdep not be recursive, and fix a bug on 403.gcc that this exposed. 
llvm-svn: 40692
 2007-08-01 22:01:54 +00:00
Dan Gohman
7dd04fb91c More explicit keywords. 
llvm-svn: 40673
 2007-08-01 15:32:29 +00:00
Owen Anderson
58e64df595 Rename FastDSE to just DSE. 
llvm-svn: 40668
 2007-08-01 06:36:51 +00:00
Owen Anderson
45499c55e5 Move FastDSE in to DeadStoreElimination. 
llvm-svn: 40667
 2007-08-01 06:30:51 +00:00
Owen Anderson
48e3b68d57 Remove old DSE. 
llvm-svn: 40666
 2007-08-01 06:30:10 +00:00
David Greene
f06a395bb9 New CallInst interface to address GLIBCXX_DEBUG errors caused by 
indexing an empty std::vector.

Updates to all clients.

llvm-svn: 40660
 2007-08-01 03:43:44 +00:00
Owen Anderson
89022c1367 Don't let the memory allocator outsmart GVN. ;-) 
llvm-svn: 40655
 2007-07-31 23:27:13 +00:00
Owen Anderson
9c996b3212 Fix a failure I accidentally caused in my last commit by mishandling the 
removal of redundant phis.

llvm-svn: 40650
 2007-07-31 20:18:28 +00:00
Lauro Ramos Venancio
abf6c6d469 Fix a bug in GetKnownAlignment of packed structs. 
llvm-svn: 40649
 2007-07-31 20:13:21 +00:00
Owen Anderson
d178c05c62 Fix a misoptimization in aha. 
llvm-svn: 40642
 2007-07-31 17:43:14 +00:00
Dan Gohman
7702c23d4a Use SCEVExpander::InsertCastOfTo instead of calling new IntToPtrInst 
directly, because the insert point used by the SCEVExpander may vary
from what LSR originally computes.

llvm-svn: 40641
 2007-07-31 17:22:27 +00:00
Devang Patel
5a3594de20 Add note. 
llvm-svn: 40638
 2007-07-31 16:52:25 +00:00
Devang Patel
84e123116e Loop unswitch preserves dom info. 
Use simple analysis interface to preserve analysis info maintained by other loop passes.

llvm-svn: 40627
 2007-07-31 08:03:26 +00:00
Devang Patel
67b3734f28 Implement Simple Analysis interfaces - cloneBasicBlockAnalysis and deleteAnalysisValue. 
llvm-svn: 40626
 2007-07-31 08:01:41 +00:00
Devang Patel
069a8d9716 If loop can be unswitched again, then do it yourself. 
llvm-svn: 40609
 2007-07-30 23:07:10 +00:00
Owen Anderson
c7545280a2 Avoid potential iterator invalidation problems. 
llvm-svn: 40607
 2007-07-30 21:26:39 +00:00
Devang Patel
81c015b472 Remove dead code. 
llvm-svn: 40606
 2007-07-30 21:10:44 +00:00
Devang Patel
1b2732c880 LCSSA preserves dom info. 
llvm-svn: 40604
 2007-07-30 20:23:45 +00:00
Devang Patel
84144042b2 Loop Rotation pass preserves dominator tree and frontier. 
llvm-svn: 40603
 2007-07-30 20:22:53 +00:00
Devang Patel
2e8466c22a LICM preserves scalar evolution and dom frontier. 
llvm-svn: 40602
 2007-07-30 20:19:59 +00:00
Reid Spencer
eb6f2d338a Fix a typo/thinko. 
llvm-svn: 40599
 2007-07-30 19:53:57 +00:00
Owen Anderson
fff534d147 Use more caching when computing non-local dependence. This makes bzip2 not 
use up the entire 32-bit address space.

llvm-svn: 40596
 2007-07-30 17:29:24 +00:00
Owen Anderson
a8d0a6ee40 Fix a bug caused by indiscriminantly asking for the dominators of a predecessor. 
llvm-svn: 40595
 2007-07-30 16:57:08 +00:00
Devang Patel
a03e82d7ee Use SmallPtrSet. 
llvm-svn: 40560
 2007-07-27 18:34:27 +00:00
Chuck Rose III
4a3a018844 VStudio compiler errors and placing Function*->ExFunc map under ManagedStatic control. 
This commit fixes two things.  One is a pair of VStudio compiler errors stemming from variables
which defined within the for loop statement and also within the body of the for loop.  I fixed these 
by renaming one of the two variables.  Additionally, I've made the Function*->ExFunc map in 
ExternalFunctions.cpp a ManagedStatic object, so that cleanup will be done on llvm_shutdown.  In repeated
uses of the interpreter, where the same Function* address may get used for completely differnet functions,
this was causing a crash.

llvm-svn: 40558
 2007-07-27 18:26:35 +00:00
Devang Patel
4dea53597a Fix thinko. Update return status appropriately. 
llvm-svn: 40546
 2007-07-26 20:21:42 +00:00
Owen Anderson
f2b10d3de3 Fix a couple more bugs in the phi construction by pulling in code that does 
almost the same things from LCSSA.

llvm-svn: 40540
 2007-07-26 18:26:51 +00:00
Dan Gohman
298f3fd9b7 Move the GET_SIDE_EFFECT_INFO logic from isInstructionTriviallyDead 
to Instruction::mayWriteToMemory, fixing a FIXME, and helping
various places that call mayWriteToMemory directly.

llvm-svn: 40533
 2007-07-26 16:06:08 +00:00
Dan Gohman
fd392a7a51 Remove a bogus return statement, what appears to have been a pasto 
from Relation::contradicts in Relation::incorporate.

llvm-svn: 40531
 2007-07-26 15:29:35 +00:00
Owen Anderson
ed75133924 Fix what is _hopefully_ the last corner case for loops. 
llvm-svn: 40503
 2007-07-25 23:54:42 +00:00
Owen Anderson
1e53615073 My last commit was not correct for nested loops. Fix it, and add a testcase for it. 
llvm-svn: 40498
 2007-07-25 22:19:40 +00:00
Owen Anderson
ce9d73dbe7 Fix an infinite loop on 300.twolf. 
llvm-svn: 40497
 2007-07-25 22:03:06 +00:00
Owen Anderson
522f7a7608 Fix a bug that was causing GVN to crash on 252.eon. 
llvm-svn: 40494
 2007-07-25 21:13:41 +00:00
Owen Anderson
6a1a8d05b8 Add basic support for performing whole-function RLE. 
Note: This has not yet been thoroughly tested.  Use at your own risk.

llvm-svn: 40489
 2007-07-25 19:57:03 +00:00
Devang Patel
d7b401bafd Add BasicInliner interface. 
This interface allows clients to inline bunch of functions with module
level call graph information.:wq

llvm-svn: 40486
 2007-07-25 18:00:25 +00:00
Owen Anderson
eb9f1b612c Add a GVN pass, using the value numbering code I developed for GVNPRE and the 
load elimination code from RedundantLoadElimination.

llvm-svn: 40469
 2007-07-24 17:55:58 +00:00
Owen Anderson
5969a3cb91 Rename a lot of things to change FastDLE to RedundantLoadElimination. 
llvm-svn: 40457
 2007-07-24 00:17:04 +00:00
Owen Anderson
2aab0eafe9 Rename FastDLE as RedundantLoadElimination. 
llvm-svn: 40456
 2007-07-24 00:08:38 +00:00
Owen Anderson
0a79ada820 Don't delete volatile loads. Doing so is not safe. 
llvm-svn: 40448
 2007-07-23 22:05:54 +00:00
Owen Anderson
bd3360e856 Add FastDLE, the load-elimination counterpart of FastDSE. 
llvm-svn: 40445
 2007-07-23 21:48:08 +00:00
Owen Anderson
d3a8c81c04 Fix file header. 
llvm-svn: 40440
 2007-07-23 18:30:37 +00:00
Chris Lattner
914de64a0a completely remove a transformation that is unsafe in the face of 
undefs.

llvm-svn: 40439
 2007-07-23 17:10:17 +00:00
Devang Patel
f45fc256e1 Apply temporary work around to fix llvm mis-compilation 
reported in PR 1556.

llvm-svn: 40133
 2007-07-21 00:34:29 +00:00
Chris Lattner
9663eb4a5b this xform is already done by the constant folder. 
llvm-svn: 40124
 2007-07-20 22:06:41 +00:00
Dan Gohman
87107326f6 Optimize alignment of loads and stores. 
llvm-svn: 40102
 2007-07-20 16:34:21 +00:00
Duncan Sands
4b390d541e Place SCCPSolver also in the anonymous namespace. This 
pacifies g++-4.2.

llvm-svn: 40089
 2007-07-20 08:56:21 +00:00
Owen Anderson
89afa507b1 Fix a bug where we were marking GEP expressions with the wrong opcode. 
llvm-svn: 40085
 2007-07-20 08:19:20 +00:00
Owen Anderson
3b1129af78 Make val_replace fail early, which reduces the time to optimize 403.gcc to 14.8s. 
llvm-svn: 40064
 2007-07-19 19:57:13 +00:00
Devang Patel
45675e56ad Verify loop info. 
llvm-svn: 40062
 2007-07-19 18:02:32 +00:00
Owen Anderson
57d33add2c Use SmallVector and DenseMap in even more places. 
With this, the time to optimize 403.gcc is down to 15.1s.

llvm-svn: 40042
 2007-07-19 06:37:56 +00:00
Owen Anderson
7a4b965739 Change ValueTable to use a DenseMap for mapping expressions to value numbers. 
This results in a slight speedup for 403.gcc.

llvm-svn: 40040
 2007-07-19 06:13:15 +00:00
Owen Anderson
c32df0bc73 Move some sets and maps to SmallPtrSet and DenseMap respectively. This 
reduces the time to optimize 403.gcc from 17.6s to 16.4s.

llvm-svn: 40036
 2007-07-19 03:32:44 +00:00
Devang Patel
fe0ef94227 After a basic block is split into two parts, 
second part dominates all the blocks dominated
by original basic block. And first part dominates
second part.

llvm-svn: 40035
 2007-07-19 02:29:24 +00:00
Devang Patel
4020116257 Now this temp. fix is not required. 
llvm-svn: 40034
 2007-07-19 02:22:21 +00:00
Devang Patel
ef7c515e9a Fix typo. 
llvm-svn: 40025
 2007-07-18 23:50:19 +00:00
Devang Patel
b5482a65c9 Fix dominator info update to accommodate CFG changes. 
This fixes PR1559.

llvm-svn: 40024
 2007-07-18 23:48:20 +00:00
Owen Anderson
55b794723f Take advantage of undefined behavior if the source program tries to GEP 
beyond the end of an alloca to make FastDSE faster and more aggressive.

llvm-svn: 39945
 2007-07-16 23:34:39 +00:00
Owen Anderson
efc00e35cf Add support for walking up memory def chains, which enables finding many more 
dead stores on 400.perlbench.

llvm-svn: 39929
 2007-07-16 21:52:50 +00:00
Reid Spencer
9496d63260 Return Undef if the block has no dominator. This was required to allow 
llvm-gcc build to succeed. Without this change it fails in libstdc++
compilation. This causes no regressions in dejagnu tests. However, 
someone who knows this code better might want to review it.

llvm-svn: 39924
 2007-07-16 21:03:44 +00:00
Dan Gohman
0ba554c0c8 Fix comments about vectors to use the current wording. 
llvm-svn: 39921
 2007-07-16 14:29:03 +00:00
Chris Lattner
66b7f0c956 Repair a regression in Transforms/InstCombine/mul.ll that Reid noticed. 
llvm-svn: 39896
 2007-07-16 04:15:34 +00:00
Nick Lewycky
6cdd641e1d Start adding and cleaning up comments. 
llvm-svn: 39894
 2007-07-16 02:58:37 +00:00
Chris Lattner
f6a91d74e0 Implement shift-simplify.ll:test[45]. 
First teach instcombine that sign bit checks only demand the 
sign bit, this allows simplify demanded bits to hack on 
expressions better.

Second, teach instcombine that ashr is useless if only the
sign bit is demanded.

llvm-svn: 39880
 2007-07-15 20:54:51 +00:00
Chris Lattner
9cb8da1cb8 Implement shift-simplify.ll:test3, turning: 
(X << 31) <s 0  --> (X&1) != 0

This happens dozens of times in the CFE.

llvm-svn: 39879
 2007-07-15 20:42:37 +00:00
Nick Lewycky
93d39c53b6 Use maximal intersection algorithm exclusively. Fixes miscompile bug. 
llvm-svn: 39852
 2007-07-14 04:28:04 +00:00
Devang Patel
9166ad7658 Make LCSSA a loop pass. 
llvm-svn: 39844
 2007-07-13 23:57:11 +00:00
Owen Anderson
9ade055c0f Handle GEPs with all-zero indices in the same way we handle pointer-pointer bitcasts. Also, fix a potentia infinite loop. 
This brings FastDSE to parity with old DSE on 175.vpr.

llvm-svn: 39839
 2007-07-13 22:50:48 +00:00
Devang Patel
cfdf3b6eff Disable claims to preserve analysis until open issues are resolved. 
llvm-svn: 39834
 2007-07-13 21:53:42 +00:00
Owen Anderson
275a5ef481 Be more aggressive in removing dead stores, and in removing instructions trivially dead after DSE. 
This drastically improves the effect of FastDSE on kimwitu++.

llvm-svn: 39819
 2007-07-13 18:26:26 +00:00
Owen Anderson
0ad3e0795b Reimplement removing stores to allocas at the end of a function. This should be safe now. 
llvm-svn: 39790
 2007-07-12 21:41:30 +00:00
Owen Anderson
999d27d563 Make the condition-checking for free with non-trivial dependencies more correct. 
llvm-svn: 39789
 2007-07-12 18:08:51 +00:00
Owen Anderson
6edb47d8be Remove the end-block handling code. It was unsafe, and making it safe would have resulted in falling back to the slow DSE case. I need to think some more about the right way to handle this. 
llvm-svn: 39788
 2007-07-12 17:52:20 +00:00
Gabor Greif
33f07df616 checked in as obvious, 
thanks Benoit Boissinot!

llvm-svn: 39774
 2007-07-12 13:31:38 +00:00
Owen Anderson
b6211f5b50 Let MemoryDependenceAnalysis take care of updating AliasAnalysis. 
llvm-svn: 39769
 2007-07-12 00:06:21 +00:00
Devang Patel
f26f0ea111 Preserve analysis info. 
llvm-svn: 39767
 2007-07-11 23:47:28 +00:00
Owen Anderson
733ff7bbc0 Handle the case where an entire structure is freed, and its dependency is a store to a field within 
that structure.

Also, refactor the runOnBasicBlock() function, splitting some of the special cases into separate functions.

llvm-svn: 39762
 2007-07-11 23:19:17 +00:00
Owen Anderson
fb23f70dbf Add support for eliminate stores to stack-allocated memory locations at the end 
of a function.

llvm-svn: 39754
 2007-07-11 21:06:56 +00:00
Owen Anderson
2388e80b0a Handle eliminating stores that occur right before a free. 
llvm-svn: 39753
 2007-07-11 20:38:34 +00:00
Owen Anderson
28789d81c5 Clean up a few things based on Chris' feedback. 
llvm-svn: 39747
 2007-07-11 19:03:09 +00:00
Tanya Lattner
a715bbe152 Adding ability to demote phi to stack. 
llvm-svn: 39744
 2007-07-11 18:41:34 +00:00
Owen Anderson
1eaba31f12 Add FastDSE, a new algorithm for doing dead store elimination. This algorithm is not as accurate 
as the current DSE, but it only a linear scan over each block, rather than quadratic.  Eventually
(once it has been improved somewhat), this will replace the current DSE.

NOTE: This has not yet been extensively tested.
llvm-svn: 38517
 2007-07-11 00:46:18 +00:00
Owen Anderson
7d38ac8a37 Make the pass registration static. 
llvm-svn: 38508
 2007-07-10 20:20:19 +00:00
Anton Korobeynikov
7971c2c9b7 During module cloning copy aliases too. This fixes PR1544 
llvm-svn: 38505
 2007-07-10 19:07:35 +00:00
Nick Lewycky
ea767d42e8 Update the ValueRanges interface to use value numbers instead of Value*s. 
llvm-svn: 38483
 2007-07-10 03:28:21 +00:00
Owen Anderson
4ce919d799 Move some key maps from std::map to DenseMap. This improves the time to optimize Anton's testcase from 17.5s 
to 15.7s.

llvm-svn: 38480
 2007-07-10 00:27:22 +00:00
Owen Anderson
65f9dd6973 Use a cheaper test, delaying calling find_leader() until we know that it's necessary. This improves 
the time to optimize Anton's testcase from 21.1s to 17.6s.

llvm-svn: 38479
 2007-07-10 00:09:25 +00:00
Owen Anderson
2106613ce6 Add an assertion if find_leader fails. 
llvm-svn: 38477
 2007-07-09 23:57:18 +00:00
Owen Anderson
8d4339f8db Take advantage of the new fast SmallPtrSet assignment operator when propagating AVAIL_OUT sets. 
This reduces the time to optimize Anton's testcase from 31.2s to 21.s!

llvm-svn: 38475
 2007-07-09 22:29:50 +00:00
Devang Patel
65f3717db9 Expose struct size threhold to allow users to tweak their own setting. 
llvm-svn: 38472
 2007-07-09 21:19:23 +00:00
Owen Anderson
08020078f3 Fix a comment. 
llvm-svn: 38459
 2007-07-09 16:43:55 +00:00
Owen Anderson
25d57adc4a Improve a hotspot that was making build_sets() slower by calling lookup() too 
often.  This improves Anton's testcase from 36s to 32s.

llvm-svn: 38441
 2007-07-09 07:56:55 +00:00
Owen Anderson
f695fa9257 Start using a set representation that remembers the set of value numbers represented 
in the set.  For the moment, this results in a slight performance decrease, but
it lays the groundwork for future improvements.

llvm-svn: 38439
 2007-07-09 06:50:06 +00:00
Owen Anderson
30fc1decdc Fix an error where ANTIC_OUT was ending up with more than one expression of 
the same value number.  This fixes an infinite loop on 444.namd.

llvm-svn: 37967
 2007-07-07 20:13:57 +00:00
Nick Lewycky
dc39ec317a Back out Devang's fix for PR1320 because it causes PR1542. 
llvm-svn: 37966
 2007-07-07 16:23:34 +00:00
Devang Patel
91939a6a55 These rountines are now available as part of basic block utilities. 
llvm-svn: 37955
 2007-07-06 22:03:47 +00:00
Devang Patel
8803061b9e Request DominanceFrontiner in advance. 
llvm-svn: 37954
 2007-07-06 21:43:22 +00:00
Devang Patel
a7af16c808 Preserve various analysis info. 
llvm-svn: 37953
 2007-07-06 21:40:13 +00:00
Devang Patel
d9043c7501 Add SplitEdge and SplitBlock utility routines. 
llvm-svn: 37952
 2007-07-06 21:39:20 +00:00
Owen Anderson
16d027ce3e Be more aggressive in the heuristic. This mostly exposes more opportunities 
for the GVN part of GVNPRE to apply.

llvm-svn: 37951
 2007-07-06 20:29:43 +00:00
Owen Anderson
d50fe47cf3 Achieve what the incorrect test was trying to do by simply requiring that all 
critical edges be split before we begin.

llvm-svn: 37949
 2007-07-06 18:12:36 +00:00
Owen Anderson
da85a8134e Remove an incorrect check. 
llvm-svn: 37948
 2007-07-06 16:52:47 +00:00
Zhou Sheng
2a79b1ae13 Correct a typo. 
llvm-svn: 37936
 2007-07-06 06:01:16 +00:00
Owen Anderson
7cf3a2aa1f Fix a bunch of issues found in a testcase from 400.perlbench. 
llvm-svn: 37929
 2007-07-05 23:11:26 +00:00
Nick Lewycky
c744dbdd30 Break "variable canonicalization" out of InequalityGraph and into its own class 
"ValueNumbering".

llvm-svn: 37881
 2007-07-05 03:15:00 +00:00
Owen Anderson
2024c08f65 Fix another bug, this time in PREing select instructions. 
llvm-svn: 37878
 2007-07-04 22:33:23 +00:00
Owen Anderson
ac8fe6b8ca Fix a typo that was killing GVNPRE of select instructions. 
llvm-svn: 37871
 2007-07-04 18:26:18 +00:00
Owen Anderson
06dd016177 Fix an error in phi translation of GEPs that was causing failures. 
llvm-svn: 37868
 2007-07-04 04:51:16 +00:00
Owen Anderson
4a5c005585 Add support for performing GVNPRE on GEP instructions. 
llvm-svn: 37862
 2007-07-03 23:51:19 +00:00
Owen Anderson
6599e49230 Add functionality to value number GEP instructions. This also provides the infrastructure that will 
be used for function calls.  NOTE: This does not yet do any transformation of GEPs or function calls.

llvm-svn: 37860
 2007-07-03 22:50:56 +00:00
Owen Anderson
778ad67a26 Make the unary operator case a bit faster, since casts are the only kind of unary operation. 
llvm-svn: 37857
 2007-07-03 19:01:42 +00:00
Owen Anderson
ba084e17fd Add support for performing GVNPRE on cast instructions, and add a testcase for this. 
llvm-svn: 37856
 2007-07-03 18:37:08 +00:00
Devang Patel
2a1af2196d Preserve DominanceFrontier. 
llvm-svn: 37820
 2007-06-29 23:11:49 +00:00
David Greene
c176772093 Fix reference to iterator invalidated by an erase operation. Uncovered 
by _GLIBCXX_DEBUG.

llvm-svn: 37796
 2007-06-29 02:53:16 +00:00
Devang Patel
8292a2ee90 Do not filter loop if candidate branch is in loop header. 
llvm-svn: 37792
 2007-06-29 01:39:53 +00:00
Owen Anderson
cff6ffe45c Add support for value numbering (but not actually optimizing) cast instructions. 
llvm-svn: 37789
 2007-06-29 00:51:03 +00:00
Owen Anderson
f134e54bb1 Add a type field to expressions in preparation for performing GVNPRE on casts. 
llvm-svn: 37788
 2007-06-29 00:40:05 +00:00
Owen Anderson
f1665858f3 Add support for performing GVNPRE on select instructions. This fixes test/Transforms/GVNPRE/select.ll. 
llvm-svn: 37783
 2007-06-28 23:51:21 +00:00
Devang Patel
03d844eebd - Undo previous check and allow loop switch for condtion that is not inside 
loop.
- Avoid loop unswich for loop header branch.
- While cloning dominators fix typo and handle self dominating blocks.

llvm-svn: 37772
 2007-06-28 02:05:46 +00:00
Devang Patel
7f468af921 Update LoopUnswitch pass to preserve DomiantorTree. 
llvm-svn: 37771
 2007-06-28 00:49:00 +00:00
Devang Patel
50d5420cdc If a condition is not inside a loop then the condition is suitable 
to loop unswitch candidate for the loop.

llvm-svn: 37770
 2007-06-28 00:44:10 +00:00
Owen Anderson
9372f36b3c Make many sets a much more reasonable size. This decreases the time to optimize 
Anton's testcase from 35.5s to 34.7s.

llvm-svn: 37769
 2007-06-28 00:34:34 +00:00
Owen Anderson
97dd99d761 Use cached information that has already been computed to make clean() simpler and faster. This is a small speedup on most cases. 
llvm-svn: 37761
 2007-06-27 17:38:29 +00:00
Owen Anderson
a7927caa56 Fold a lot of code into two cases: binary instructions and ternary instructions. 
This saves many lines of code duplication.  No functionality change.

llvm-svn: 37759
 2007-06-27 17:03:03 +00:00
Zhou Sheng
011fc80616 Fix a bug. 
llvm-svn: 37751
 2007-06-27 09:50:26 +00:00
Owen Anderson
97de56ae2b Add support for performing GVNPRE on the three vector-specific operations. 
llvm-svn: 37745
 2007-06-27 04:10:46 +00:00
Owen Anderson
dc1d567274 1. Correct some comments and clean up some dead code. 
2. When calculating ANTIC_IN, only iterate the changed blocks.  For most average
inputs this is a small speedup, but for cases with unusual CFGs, this can be a significant win.

llvm-svn: 37742
 2007-06-26 23:29:41 +00:00
Chris Lattner
64e8e4af59 fix Transforms/Inline/2007-06-25-WeakInline.ll by not inlining functions 
with weak linkage.

llvm-svn: 37723
 2007-06-25 21:50:09 +00:00
Owen Anderson
fb09af59e0 Use the built-in postorder iterators rather than computing a postorder walk by hand. 
llvm-svn: 37721
 2007-06-25 18:25:31 +00:00
Owen Anderson
293173ccd2 1) Fix an issue with non-deterministic iteration order in phi_translate 
2) Remove some maximal-set computing code that is no longer used.
3) Use a post-order CFG traversal to compute ANTIC_IN instead of a postdom traversal.
This causes the ANTIC_IN calculation to converge much faster.  Thanks to Daniel Berlin for suggesting this.

With this patch, the time to optimize 403.gcc decreased from 17.5s to 7.5s, and Anton's huge
testcase decreased from 62 minutes to 38 seconds.

llvm-svn: 37714
 2007-06-25 05:41:12 +00:00
Nick Lewycky
59c02f6336 Fix value ranges. 
llvm-svn: 37713
 2007-06-24 20:14:22 +00:00
Owen Anderson
e16e7f2d3d Fix a silly mistake that was causing failures. 
llvm-svn: 37712
 2007-06-24 08:42:24 +00:00
Nick Lewycky
c238dd7dca Remove tabs. 
llvm-svn: 37710
 2007-06-24 04:40:16 +00:00
Nick Lewycky
fff717bc50 Remove use of ETForest. Also cleaned up issues around unreachable basic 
blocks, and optimizing within one basic block.

llvm-svn: 37709
 2007-06-24 04:36:20 +00:00
Owen Anderson
4713f37034 Rework topo_sort so eliminate some behavior that scaled terribly. This reduces the time to optimize 403.gcc from 18.2s to 17.5s, 
and has an even larger effect on larger testcases.

llvm-svn: 37708
 2007-06-22 21:31:16 +00:00
Owen Anderson
65af4e7d2b Perform fewer set insertions while calculating ANTIC_IN. This reduces the amount of time to optimize 403.gcc from 21.9s to 18.2s. 
llvm-svn: 37707
 2007-06-22 18:27:04 +00:00
Owen Anderson
1fe94b16dc Remove some code that I was using for collecting performance information that should not have been committed. 
llvm-svn: 37706
 2007-06-22 17:04:40 +00:00
Owen Anderson
92c7510376 Avoid excessive calls to find_leader when calculating AVAIL_OUT. This reduces the time to optimize 403.gcc from 23.5s to 21.9s. 
llvm-svn: 37702
 2007-06-22 03:14:03 +00:00
Owen Anderson
0abfa1ecb2 Reserve space in vectors before topologically sorting into them. This improves the time to optimize 403.gcc from 28s to 23.5s. 
llvm-svn: 37699
 2007-06-22 00:43:22 +00:00
Owen Anderson
e121e85517 Make a bunch of optimizations for compile time to GVNPRE, including smarter set unions, deferring blocks rather than computing maximal sets, and smarter use of sets. With these enhancements, the time to optimize 273.perlbmk goes from 5.3s to 2.7s. 
llvm-svn: 37698
 2007-06-22 00:20:30 +00:00
Chris Lattner
4624e16f16 Significantly improve the documentation of the instcombine divide/compare 
transformation.  Also, keep track of which end of the integer interval overflows
occur on.  This fixes Transforms/InstCombine/2007-06-21-DivCompareMiscomp.ll
and rdar://5278853, a miscompilation of perl.

llvm-svn: 37692
 2007-06-21 18:11:19 +00:00
Owen Anderson
eb29dac190 Change lots of sets from std::set to SmallPtrSet. This reduces the time required to optimize 253.perlbmk from 10.9s to 5.3s. 
llvm-svn: 37690
 2007-06-21 17:57:53 +00:00
Devang Patel
bfb1c7192e Move code to update dominator information after basic block is split 
from LoopSimplify.cpp to Dominator.cpp

llvm-svn: 37689
 2007-06-21 17:23:45 +00:00
Owen Anderson
a783224b25 Eliminate a redundant check. This speeds up optimization of 253.perlbmk from 13.5 seconds to 10.9 seconds. 
llvm-svn: 37683
 2007-06-21 01:59:05 +00:00
Owen Anderson
b06cc18b7c Comment-ize the functions in GVNPRE. 
llvm-svn: 37681
 2007-06-21 00:19:05 +00:00
Chris Lattner
26537049eb refactor a bunch of code out of visitICmpInstWithInstAndIntCst into its own 
routine.

llvm-svn: 37679
 2007-06-20 23:46:26 +00:00
Owen Anderson
ff60973eb8 Split runOnFunction into many smaller functions. This make it easier to get accurate performance analysis of GVNPRE. 
llvm-svn: 37678
 2007-06-20 22:10:02 +00:00
Owen Anderson
58265d2391 Make GVNPRE accurate report whether it modified the function or not. 
llvm-svn: 37673
 2007-06-20 18:30:20 +00:00
Owen Anderson
815c4d384b Get rid of an unneeded helper function. 
llvm-svn: 37670
 2007-06-20 00:43:33 +00:00
Owen Anderson
997c4e5e47 Use a DenseMap instead of an std::map for the value numbering. This reduces the time to optimize lencod on a PPC Debug build from ~300s to ~140s. 
llvm-svn: 37668
 2007-06-19 23:23:54 +00:00
Owen Anderson
5a902e6afc Make dependsOnInvoke much more specific in what it tests, which in turn make it much faster to run. This reduces the time to optimize lencondwith a debug build on PPC from ~450s to ~300s. 
llvm-svn: 37667
 2007-06-19 23:07:16 +00:00
Tanya Lattner
b2aae813b6 Moved Inliner.h to include/llvm/Transforms/IPO/InlinerPass.h 
llvm-svn: 37666
 2007-06-19 22:31:52 +00:00
Tanya Lattner
a2e912bf51 Inliner pass header file was moved. 
llvm-svn: 37665
 2007-06-19 22:29:50 +00:00
Dan Gohman
bb705e230a Rename ScalarEvolution::deleteInstructionFromRecords to 
deleteValueFromRecords and loosen the types to all it to accept
Value* instead of just Instruction*, since this is what
ScalarEvolution uses internally anyway. This allows more flexibility
for future uses.

llvm-svn: 37657
 2007-06-19 14:28:31 +00:00
Owen Anderson
0eafdcafe7 Handle constants in phi nodes properly. This fixes test/Transforms/GVNPRE/2007-06-18-ConstantInPhi.ll 
llvm-svn: 37655
 2007-06-19 07:35:36 +00:00
Chris Lattner
6809b4b4fa silence a bogus warning Duraid ran into. 
llvm-svn: 37649
 2007-06-19 05:43:49 +00:00
Owen Anderson
f74f94d859 Be careful to erase values from all of the appropriate sets when they're not needed anymore. This fixes a few more memory-related issues. 
llvm-svn: 37647
 2007-06-19 05:37:32 +00:00
Owen Anderson
d3d1716516 Remember to clear the maximal sets between functions. 
Thanks to Nicholas for valgrinding this.

llvm-svn: 37646
 2007-06-19 04:32:55 +00:00
Owen Anderson
dc858f6498 Refactor GVNPRE to use a much smart method of uniquing value sets, and centralize a lot of the value numbering information. No functionality change. 
llvm-svn: 37645
 2007-06-19 03:31:41 +00:00
Owen Anderson
58098f3560 Cache the results of dependsOnInvoke() 
llvm-svn: 37622
 2007-06-18 04:42:29 +00:00
Owen Anderson
8956588783 Fix indentation. 
llvm-svn: 37621
 2007-06-18 04:31:21 +00:00
Owen Anderson
c45b435273 Don't perform an expensive check if it's not necessary. 
llvm-svn: 37620
 2007-06-18 04:30:44 +00:00
Owen Anderson
0c8b051523 Fix test/Transforms/GVNPRE/2007-06-15-InvokeInst.ll by ignoring all instructions that depend on invokes. 
llvm-svn: 37610
 2007-06-16 00:26:54 +00:00
Dan Gohman
a3ea76f018 Use SCEVConstant::get instead of SCEVUnknown::get to create an 
integer constant SCEV.

llvm-svn: 37596
 2007-06-15 18:00:55 +00:00
Owen Anderson
5a2d597072 Fix test/Transforms/GVNPRE/2007-06-15-Looping.ll 
llvm-svn: 37595
 2007-06-15 17:55:15 +00:00
Dan Gohman
838ba27094 Add a SCEV class and supporting code for sign-extend expressions. 
This created an ambiguity for expandInTy to decide when to use
sign-extension or zero-extension, but it turns out that most of its callers
don't actually need a type conversion, now that LLVM types don't have
explicit signedness. Drop expandInTy in favor of plain expand, and change
the few places that actually need a type conversion to do it themselves.

llvm-svn: 37591
 2007-06-15 14:38:12 +00:00
Chris Lattner
3a979f2fa5 Generalize many transforms to work on ~ of vectors in addition to ~ of 
integer ops.  This implements Transforms/InstCombine/and-or-not.ll
test3/test4, and finishes off PR1510

llvm-svn: 37589
 2007-06-15 06:23:19 +00:00
Chris Lattner
6c32b44b4c Implement two xforms: 
1. ~(~X | Y) === (X & ~Y)
2. (A|B) & ~(A&B) -> A^B

This allows us to transform  ~(~(a|b) | (a&b)) -> a^b.

This implements PR1510 for scalar values.

llvm-svn: 37584
 2007-06-15 05:58:24 +00:00
Chris Lattner
96c6cf8b89 delete some obviously dead vector operations, which deletes a few thousand 
operations from Duraids example.

llvm-svn: 37582
 2007-06-15 05:26:55 +00:00
Owen Anderson
67084c3848 Fix test/Transforms/GVNPRE/2007-06-12-PhiTranslate.ll 
llvm-svn: 37564
 2007-06-12 22:43:57 +00:00
Owen Anderson
f476df648e Refactor some code, and fix test/Transforms/GVNPRE/2007-06-12-NoExit.ll by being more careful when using 
post-dominator information.

llvm-svn: 37556
 2007-06-12 16:57:50 +00:00
Dale Johannesen
f223789fea Sink CmpInst's to their uses to reduce register pressure. 
llvm-svn: 37554
 2007-06-12 16:50:17 +00:00
Owen Anderson
8fd2a040de Fix a few more bugs, including an instance of walking in reverse topological rather than topological order. This 
fixes a testcase extracted from llvm-test.

llvm-svn: 37550
 2007-06-12 00:50:47 +00:00
Devang Patel
bc3887310b Add and use DominatorTreeBase::findNearestCommonDominator(). 
llvm-svn: 37545
 2007-06-11 23:31:22 +00:00
Devang Patel
336e38d425 Simplify. 
llvm-svn: 37542
 2007-06-11 21:45:31 +00:00
Devang Patel
8fba00d86d simplify 
llvm-svn: 37541
 2007-06-11 21:25:31 +00:00
Devang Patel
35df53ab56 Simplify. Dominator Tree is required so always available. 
llvm-svn: 37540
 2007-06-11 21:18:00 +00:00
Owen Anderson
cdb51c9ac4 Handle functions with multiple exit blocks properly. 
llvm-svn: 37539
 2007-06-11 16:25:17 +00:00
Owen Anderson
532366fb7d Perform PRE of comparison operators. 
llvm-svn: 37536
 2007-06-09 18:35:31 +00:00
Owen Anderson
1e60429027 Collect statistics from GVN-PRE. 
llvm-svn: 37530
 2007-06-08 22:02:36 +00:00
Owen Anderson
2cf00c37de Fix typo in a comment. 
llvm-svn: 37526
 2007-06-08 20:57:08 +00:00
Owen Anderson
4621335527 Fix a bug that was causing the elimination phase not to replace values when it should be. 
With this patch, GVN-PRE now correctly optimizes the example from the thesis.

Many thanks to Daniel Berlin for helping me find errors in this.

llvm-svn: 37525
 2007-06-08 20:44:02 +00:00
Owen Anderson
64daf17aa0 Small bugfix, and const-ify some methods (Thanks, Bill). 
llvm-svn: 37513
 2007-06-08 01:52:45 +00:00
Devang Patel
cfb3a761ae Update LoopSimplify to require and preserve DominatorTree only. 
Now LoopSimplify does not require nor preserve ETForest.

llvm-svn: 37512
 2007-06-08 01:50:32 +00:00
Owen Anderson
ccd2616fbb Add partial redundancy elimination. 
llvm-svn: 37510
 2007-06-08 01:03:01 +00:00
Devang Patel
b5554f450a Do not preserve ETForest. 
llvm-svn: 37506
 2007-06-08 00:02:08 +00:00
Devang Patel
8d261e921f Do not require ETForest. Now it is unused by LICM. 
llvm-svn: 37502
 2007-06-07 22:21:15 +00:00
Devang Patel
3daf3625ab Do not use ETForest as well as DomiantorTree. DominatorTree is sufficient. 
llvm-svn: 37501
 2007-06-07 22:17:16 +00:00
Devang Patel
a466c96f77 Use DominatorTree instead of ETForest. 
This allows faster immediate domiantor walk.

llvm-svn: 37500
 2007-06-07 21:57:03 +00:00
Devang Patel
5678b94d16 Use DominatorTree instead of ETForest. 
llvm-svn: 37499
 2007-06-07 21:42:15 +00:00
Devang Patel
de2a20aefe Use DominatorTree instead of ETForest. 
llvm-svn: 37498
 2007-06-07 21:35:27 +00:00
Devang Patel
5c0808db4f Use DominatorTree instead of ETForest. 
llvm-svn: 37495
 2007-06-07 18:45:06 +00:00
Devang Patel
700d930e73 Use DominatorTree instead of ETForest. 
llvm-svn: 37494
 2007-06-07 18:40:55 +00:00
Devang Patel
babcd06827 Maintain ETNode as part of DomTreeNode. 
This adds redundancy for now.

llvm-svn: 37492
 2007-06-07 17:47:21 +00:00
Tanya Lattner
968030663f Formating fixes. 
llvm-svn: 37491
 2007-06-07 17:12:16 +00:00
Tanya Lattner
9672d69be2 Instruct the inliner to obey the noinline attribute. Add test case. 
llvm-svn: 37481
 2007-06-06 21:59:26 +00:00
Chris Lattner
c5d0dc3554 simplify this code and fix PR1493, now that llvm-gcc3 is dead. 
llvm-svn: 37478
 2007-06-06 20:51:41 +00:00
Lauro Ramos Venancio
27fa43f343 Fix PR1499. 
llvm-svn: 37472
 2007-06-06 17:08:48 +00:00
Nick Lewycky
65199a504b Inform ScalarEvolutions that we're deleting Values. 
This is the obviously correct part of the fix for PR1487.

llvm-svn: 37457
 2007-06-06 03:51:56 +00:00
Owen Anderson
501e5873d4 Add simple full redundancy elimination. 
llvm-svn: 37455
 2007-06-06 01:27:49 +00:00
Chris Lattner
a874ddba43 Fix PR1495 and CodeGen/X86/2007-06-05-LSR-Dominator.ll 
llvm-svn: 37454
 2007-06-06 01:23:55 +00:00
Devang Patel
61661c6774 Avoid non-trivial loop unswitching while optimizing for size. 
llvm-svn: 37446
 2007-06-06 00:21:03 +00:00
Owen Anderson
3aa2107b02 Fix a misunderstanding of the algorithm. Really, we should be tracking values 
and expression separately.  We can get around this, however, by only keeping
opaque values in TMP_GEN.

llvm-svn: 37443
 2007-06-05 23:46:12 +00:00
Owen Anderson
3c9c199f2d Don't leak memory. 
llvm-svn: 37442
 2007-06-05 22:11:49 +00:00
Owen Anderson
25a0068940 Fix a small bug, some 80 cols violations, and add some more debugging output. 
llvm-svn: 37436
 2007-06-05 17:31:23 +00:00
Dan Gohman
08d77288c1 Allow insertelement, extractelement, and shufflevector to be hoisted/sunk 
by LICM.

llvm-svn: 37435
 2007-06-05 16:05:55 +00:00
Bill Wendling
d2b1274d1b Patches by Chuck Rose to unbreak V Studio builds. 
Thanks Chuck!

llvm-svn: 37428
 2007-06-04 23:52:59 +00:00
Devang Patel
ba29e5e591 s/ETNode::getChildren/ETNode::getETNodeChildren/g 
llvm-svn: 37426
 2007-06-04 23:45:02 +00:00
Owen Anderson
dde6943d82 Don't use std::set_difference when the two sets are sorted differently. Compute 
the difference manually instead.

This allows GVNPRE to produce correct analysis for the example in the GVNPRE
paper.

llvm-svn: 37425
 2007-06-04 23:34:56 +00:00
Owen Anderson
0cab4450c3 Fix a bunch of small bugs, and improve the debugging output significantly. 
llvm-svn: 37424
 2007-06-04 23:28:33 +00:00
Chris Lattner
7726564331 When rebuilding constant structs, make sure to honor the isPacked bit. 
This fixes PR1491 and GlobalOpt/2007-06-04-PackedStruct.ll

llvm-svn: 37423
 2007-06-04 22:23:42 +00:00
Owen Anderson
2043bb65a4 Make phi_translate correct. 
llvm-svn: 37418
 2007-06-04 18:05:26 +00:00
Devang Patel
74785c1f3c s/DominatorTree::createNewNode/DominatorTree::addNewBlock/g 
llvm-svn: 37415
 2007-06-04 16:43:25 +00:00
Devang Patel
26d8a86df7 Add basic block level interface to change immediate dominator 
and create new node.

llvm-svn: 37414
 2007-06-04 16:22:33 +00:00
Devang Patel
2ef6caf14f s/llvm::DominatorTreeBase::DomTreeNode/llvm::DomTreeNode/g 
llvm-svn: 37407
 2007-06-04 00:32:22 +00:00
Owen Anderson
39e6d31260 Don't use the custom comparator where it's not necessary. 
llvm-svn: 37406
 2007-06-03 22:02:14 +00:00
Devang Patel
d58b82f83a s/DominatorTreeBase::Node/DominatorTreeBase:DomTreeNode/g 
llvm-svn: 37403
 2007-06-03 06:26:14 +00:00
Owen Anderson
76e8d46c1b Remove an unused method. 
llvm-svn: 37402
 2007-06-03 05:58:25 +00:00
Owen Anderson
d7388dc4ce There's no need to have an Expression class... Value works just as well! This simplifies a lot of code. 
llvm-svn: 37401
 2007-06-03 05:55:58 +00:00
Devang Patel
bdacf6c9c9 Insert new instructions in AliasSet. 
llvm-svn: 37390
 2007-06-01 22:15:31 +00:00
Owen Anderson
fadd9e4a7a clean() needs to process things in topological order. 
llvm-svn: 37389
 2007-06-01 22:00:37 +00:00
Owen Anderson
da27462cea Fix Expression comparison, which in turn fixes a value numbering error. 
llvm-svn: 37386
 2007-06-01 17:34:47 +00:00
Owen Anderson
6e39e65e7f Add a topological sort function. 
llvm-svn: 37376
 2007-05-31 22:44:11 +00:00
Owen Anderson
919ee81e51 Attempt to fix up phi_translate. 
llvm-svn: 37366
 2007-05-31 00:42:15 +00:00
Devang Patel
044601033f Fix typo. 
llvm-svn: 37360
 2007-05-30 15:29:37 +00:00
Chris Lattner
fd963f9138 Fix Transforms/ScalarRepl/2007-05-29-MemcpyPreserve.ll and the second 
half of PR1421, by not decimating structs with holes that are the source and
destination of a memcpy.

llvm-svn: 37358
 2007-05-30 06:11:23 +00:00
Owen Anderson
328c980fad Fix a typo 
llvm-svn: 37350
 2007-05-29 23:34:14 +00:00
Owen Anderson
0f46c29ffd Re-fix a bug, where I was now being too aggressive. 
llvm-svn: 37348
 2007-05-29 23:26:30 +00:00
Owen Anderson
cfeeaac401 Use proper debugging facilities so other people don't have to look at my commented-out 
debugging lines.

llvm-svn: 37347
 2007-05-29 23:15:21 +00:00
Owen Anderson
1e1d693893 Comment debug code out that I accidentally uncommented last time. 
llvm-svn: 37346
 2007-05-29 22:43:03 +00:00
Owen Anderson
707e37c6a6 Add a place where I missed using the maximal set. Note that using the maximal 
set this way is _SLOW_.  Somewhere down the line, I'll look at speeding it up.

llvm-svn: 37345
 2007-05-29 22:35:41 +00:00
Owen Anderson
83bd7bcf6c Very first part of a GVN-PRE implementation. It currently performs a bunch of analysis, and nothing more. It is also quite slow for the moment. However, 
it should give a sense of what's going on.

llvm-svn: 37343
 2007-05-29 21:53:49 +00:00