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6898 Commits

Author SHA1 Message Date
Owen Anderson
84774eda4b Tweak per Chris' comments. 
llvm-svn: 108736
 2010-07-19 19:23:32 +00:00
Owen Anderson
32a58342ed Reimplement r108639 in InstCombine rather than DAGCombine. 
llvm-svn: 108687
 2010-07-19 08:09:34 +00:00
Owen Anderson
7d2818b073 Another attempt at getting the clang self-host to like my instcombine patch. 
llvm-svn: 108614
 2010-07-17 06:56:35 +00:00
Chris Lattner
27e997a168 eliminate unlockedRefineAbstractTypeTo, types are all per-llvmcontext, 
so there is no locking involved in type refinement.

llvm-svn: 108553
 2010-07-16 20:50:13 +00:00
Dan Gohman
efd7f9c360 Reorder the contents of various getAnalysisUsage functions, eliminating 
a redundant loopsimplify run from the default -O2 sequence.

llvm-svn: 108539
 2010-07-16 17:58:45 +00:00
Owen Anderson
8a39c807e2 Remove the rest of my instcombine changes. Back to the drawing board on this one. 
llvm-svn: 108530
 2010-07-16 16:39:00 +00:00
Gabor Greif
6d673953e3 eliminate CallInst::ArgOffset 
llvm-svn: 108522
 2010-07-16 09:38:02 +00:00
Nick Lewycky
375efe3157 Arrays and vectors with different numbers of elements are not equivalent. 
llvm-svn: 108517
 2010-07-16 06:31:12 +00:00
Eric Christopher
15a81cddb4 Also revert 108422, it's causing some test failures. 
Working on testcases for Owen.

llvm-svn: 108494
 2010-07-16 01:36:12 +00:00
Dan Gohman
1415208292 Don't merge uses when they are targetting fixup sites with 
different widths. In a use with a narrower fixup, formulae
may be wider than the fixup, in which case the high bits
aren't necessarily meaningful, so it isn't safe to reuse
them for uses with wider fixups.

This fixes PR7618, though the testcase is too large for a
reasonable regression test, since it heavily dependes on
hitting LSR's heuristics in a certain way.

llvm-svn: 108455
 2010-07-15 20:24:58 +00:00
Dan Gohman
a1501b9c50 Use dbgs() instead of errs() in a DEBUG. 
llvm-svn: 108453
 2010-07-15 20:12:42 +00:00
Owen Anderson
eaf64d5c1e Speculatively revert r108429 to fix the clang self-host. 
llvm-svn: 108436
 2010-07-15 18:18:57 +00:00
Owen Anderson
eb08d01061 Per Chris' suggestion, get rid of the select canonicalization and just add 
the corresponding or-icmp-and pattern.  This has the added benefit of doing
the matching earlier, and thus being less susceptible to being confused by
earlier transforms.

llvm-svn: 108429
 2010-07-15 17:24:23 +00:00
Owen Anderson
13700ebb02 Remove unneeded check, and correct style. 
llvm-svn: 108427
 2010-07-15 16:38:22 +00:00
Dan Gohman
4afd412d6b Watch out for a constant offset cancelling out a base register, forming 
a zero. This situation arrises in Fortran code with induction variables
that start at 1 instead of 0. This fixes PR7651.

llvm-svn: 108424
 2010-07-15 15:14:45 +00:00
Owen Anderson
7151dfd48a Reapply r108378, with bugfixes, testcase, and improved comment formatting. 
This now passes LIT, nighty test, and llvm-gcc bootstrap on my machine.

llvm-svn: 108422
 2010-07-15 15:00:23 +00:00
Nick Lewycky
485ce5a49c This is a full sentence. 
llvm-svn: 108418
 2010-07-15 06:51:22 +00:00
Nick Lewycky
e6f3287cbb Disable aliases on all platforms. 
llvm-svn: 108417
 2010-07-15 06:48:56 +00:00
Chris Lattner
e41ab07c61 make various clients of ReplaceAndSimplifyAllUses tolerate 
it *changing* the things it replaces, not just causing them
to drop to null.  There is no functionality change yet, but 
this is required for a subsequent patch.

llvm-svn: 108414
 2010-07-15 06:06:04 +00:00
Eli Friedman
a8b4e3732b Speculatively revert r108378; may be causing bootstrap failures. 
llvm-svn: 108389
 2010-07-15 00:33:00 +00:00
Owen Anderson
37d91d84af Add instcombine transforms to optimize tests of multiple bits of the same value into a single larger comparison. 
llvm-svn: 108378
 2010-07-14 23:33:51 +00:00
Owen Anderson
2cfe91379b Extend SimplifyCFG's common-destination folding heuristic to allow a single 
"bonus" instruction to be speculatively executed.  Add a heuristic to
ensure we're not tripping up out-of-order execution by checking that this bonus
instruction only uses values that were already guaranteed to be available.

This allows us to eliminate the short circuit in (x&1)&&(x&2).

llvm-svn: 108351
 2010-07-14 19:52:16 +00:00
Chris Lattner
ec0e7b1643 revert r108320, I see the failures now... 
llvm-svn: 108322
 2010-07-14 06:16:35 +00:00
Chris Lattner
658680b2f5 reapply benjamin's instcombine patch, I don't see anything wrong with it and can't repro any problems with a manual self-host. 
llvm-svn: 108320
 2010-07-14 05:59:13 +00:00
Eric Christopher
ea282034b6 Grammar. 
llvm-svn: 108252
 2010-07-13 18:27:13 +00:00
Duncan Sands
f88a284579 Handle the case of a tail recursion in which the tail call is followed 
by a return that returns a constant, while elsewhere in the function
another return instruction returns a different constant.  This is a
special case of accumulator recursion, so just generalize the existing
logic a bit.

llvm-svn: 108241
 2010-07-13 15:41:41 +00:00
Benjamin Kramer
8f36402ac2 Nope, still breaks the release selfhost bots :( 
llvm-svn: 108153
 2010-07-12 16:38:48 +00:00
Benjamin Kramer
07b695e052 Reapply the "or" half of r108136, which seems to be less problematic. 
llvm-svn: 108152
 2010-07-12 16:15:48 +00:00
Gabor Greif
1b787df129 cache result of operator* 
llvm-svn: 108150
 2010-07-12 15:48:26 +00:00
Benjamin Kramer
c719e8ae9e Revert r108141 again, sigh. 
llvm-svn: 108148
 2010-07-12 14:42:04 +00:00
Gabor Greif
96fedcb136 cache result of operator* 
llvm-svn: 108147
 2010-07-12 14:15:58 +00:00
Gabor Greif
f9c38b5a45 cache result of operator* 
llvm-svn: 108146
 2010-07-12 14:15:10 +00:00
Gabor Greif
88dd73b75e cache result of operator* 
llvm-svn: 108145
 2010-07-12 14:14:03 +00:00
Gabor Greif
a75ed761a9 cache result of operator* 
llvm-svn: 108144
 2010-07-12 14:13:15 +00:00
Gabor Greif
15445db11b cache results of operator* 
llvm-svn: 108143
 2010-07-12 14:12:11 +00:00
Gabor Greif
a5fa885d47 cache results of operator* 
llvm-svn: 108142
 2010-07-12 14:10:24 +00:00
Benjamin Kramer
f578c36035 Reapply 108136 with an ugly pasto fixed. 
llvm-svn: 108141
 2010-07-12 13:44:00 +00:00
Benjamin Kramer
11743249e6 Move optimization to avoid redundant matching. 
llvm-svn: 108140
 2010-07-12 13:34:22 +00:00
Benjamin Kramer
9675e759cf Revert r108136 until I figure out why it broke selfhost. 
llvm-svn: 108139
 2010-07-12 12:35:49 +00:00
Gabor Greif
782f62412f cache dereferenced iterators 
llvm-svn: 108138
 2010-07-12 12:03:02 +00:00
Gabor Greif
433b975fe2 recommit r108131 (hich has been backed out in r108135) with a fix 
llvm-svn: 108137
 2010-07-12 12:02:10 +00:00
Benjamin Kramer
35473faa50 instcombine: fold (x & y) | (~x & z) and (x & y) ^ (~x & z) into ((y ^ z) & x) ^ z which is one instruction shorter. (PR6773) 
before:
  %and = and i32 %y, %x
  %neg = xor i32 %x, -1
  %and4 = and i32 %z, %neg
  %xor = xor i32 %and4, %and

after:
  %xor1 = xor i32 %z, %y
  %and2 = and i32 %xor1, %x
  %xor = xor i32 %and2, %z

llvm-svn: 108136
 2010-07-12 11:54:45 +00:00
Gabor Greif
f9610827ce back out r108131 (of TailDuplication.cpp) for now, it causes a buildbot failure 
llvm-svn: 108135
 2010-07-12 11:32:39 +00:00
Gabor Greif
6143704ac5 cache dereferenced iterators 
llvm-svn: 108134
 2010-07-12 11:19:24 +00:00
Gabor Greif
8629f12bb8 cache dereferenced iterators 
llvm-svn: 108133
 2010-07-12 10:59:23 +00:00
Gabor Greif
d993402df3 cache dereferenced iterators 
llvm-svn: 108132
 2010-07-12 10:49:54 +00:00
Gabor Greif
2a464d7308 cache dereferenced iterators 
llvm-svn: 108131
 2010-07-12 10:36:48 +00:00
Duncan Sands
41b4a6b36a Convert some tab stops into spaces. 
llvm-svn: 108130
 2010-07-12 08:16:59 +00:00
Chris Lattner
601e390a3b make the prototypes for CreateMalloc and CreateFree more consistent. Patch 
by Hans Vandierendonck from PR7605

llvm-svn: 108116
 2010-07-12 00:57:28 +00:00
Chris Lattner
bbc25ff5cc if jump threading is able to infer interesting values on both 
the LHS and RHS of an and/or instruction, don't multiply add
known predecessor values.  This fixes the crash on testcase
from PR7498

llvm-svn: 108114
 2010-07-12 00:47:34 +00:00