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217 Commits

Author SHA1 Message Date
Gabor Greif dde79d8f1a mass elimination of reliance on automatic iterator dereferencing 
llvm-svn: 109103
 2010-07-22 13:36:47 +00:00
Gabor Greif 3e44ea1917 undo 80 column trespassing I caused 
llvm-svn: 109092
 2010-07-22 10:37:47 +00:00
Owen Anderson a57b97e7e7 Fix batch of converting RegisterPass<> to INTIALIZE_PASS(). 
llvm-svn: 109045
 2010-07-21 22:09:45 +00:00
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
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
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
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 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
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
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
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
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
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
Duncan Sands 41b4a6b36a Convert some tab stops into spaces. 
llvm-svn: 108130
 2010-07-12 08:16:59 +00:00
Gabor Greif 0028cc6730 cache result of operator* 
llvm-svn: 107972
 2010-07-09 15:01:36 +00:00
Gabor Greif 60a346d0f1 do not repeatedly dereference use_iterator 
llvm-svn: 107962
 2010-07-09 12:23:50 +00:00
Benjamin Kramer 2321e6a4d4 Teach instcombine to transform 
(X >s -1) ? C1 : C2 and (X <s  0) ? C2 : C1
into ((X >>s 31) & (C2 - C1)) + C1, avoiding the conditional.

This optimization could be extended to take non-const C1 and C2 but we better
stay conservative to avoid code size bloat for now.

for
int sel(int n) {
     return n >= 0 ? 60 : 100;
}

we now generate
  sarl  $31, %edi
  andl  $40, %edi
  leal  60(%rdi), %eax

instead of
  testl %edi, %edi
  movl  $60, %ecx
  movl  $100, %eax
  cmovnsl %ecx, %eax

llvm-svn: 107866
 2010-07-08 11:39:10 +00:00
Gabor Greif 3abd881bea use getArgOperand (corrected by CallInst::ArgOffset) instead of getOperand 
llvm-svn: 107275
 2010-06-30 12:38:26 +00:00
Gabor Greif 5b1370ee80 use ArgOperand API 
llvm-svn: 107017
 2010-06-28 16:50:57 +00:00
Gabor Greif e23efeef10 use ArgOperand API 
llvm-svn: 107016
 2010-06-28 16:45:00 +00:00
Gabor Greif 5f3e656a1b use ArgOperand API (some hunks I could split) 
llvm-svn: 106824
 2010-06-25 07:57:14 +00:00
Gabor Greif 7ccec09252 use ArgOperand API 
llvm-svn: 106752
 2010-06-24 16:11:44 +00:00
Gabor Greif a6d75e2cf7 use (even more, still) ArgOperand API 
llvm-svn: 106750
 2010-06-24 15:51:11 +00:00
Gabor Greif 0a136c9b53 use (even more) ArgOperand API 
llvm-svn: 106744
 2010-06-24 13:54:33 +00:00
Gabor Greif 590d95ed18 use ArgOperand API 
llvm-svn: 106743
 2010-06-24 13:42:49 +00:00
Gabor Greif 589a0b950a use ArgOperand API 
llvm-svn: 106740
 2010-06-24 12:58:35 +00:00
Gabor Greif 7943017490 use ArgOperand API 
llvm-svn: 106737
 2010-06-24 12:35:13 +00:00
Gabor Greif 75f6943c95 use ArgOperand API, also tighten the type of visitFree to make this work out smoothly 
llvm-svn: 106736
 2010-06-24 12:21:15 +00:00
Gabor Greif 4a39b84a9d use ArgOperand API 
llvm-svn: 106707
 2010-06-24 00:44:01 +00:00
Dan Gohman 826bdf8c10 Move FindAvailableLoadedValue isSafeToLoadUnconditionally out of 
lib/Transforms/Utils and into lib/Analysis so that Analysis passes
can use them.

llvm-svn: 104949
 2010-05-28 16:19:17 +00:00
Dan Gohman df5d7dcef1 Teach instcombine to promote alloca array sizes. 
llvm-svn: 104945
 2010-05-28 15:09:00 +00:00
Dan Gohman 05a6555acb Fix instcombine's handling of alloca to accept non-i32 types. 
llvm-svn: 104935
 2010-05-28 04:33:04 +00:00
Duncan Sands f162eace49 Teach instCombine to remove malloc+free if malloc's only uses are comparisons 
to null.  Patch by Matti Niemenmaa.

llvm-svn: 104871
 2010-05-27 19:09:06 +00:00
Dan Gohman a4abd035ea Fix a missing newline in debug output. 
llvm-svn: 104644
 2010-05-25 21:50:35 +00:00
Duncan Sands 6c5e4355bb I got tired of VISIBILITY_HIDDEN colliding with the gcc enum. Rename it 
to LLVM_LIBRARY_VISIBILITY and introduce LLVM_GLOBAL_VISIBILITY, which is
the opposite, for future use by dragonegg.

llvm-svn: 103495
 2010-05-11 20:16:09 +00:00
Chris Lattner 02b0df5338 Teach instcombine to transform a bitcast/(zext|trunc)/bitcast sequence 
with a vector input and output into a shuffle vector.  This sort of 
sequence happens when the input code stores with one type and reloads
with another type and then SROA promotes to i96 integers, which make
everyone sad.

This fixes rdar://7896024

llvm-svn: 103354
 2010-05-08 21:50:26 +00:00
Chris Lattner 4bd85e47bf further clarify alignment of globals, fix instcombine 
to not increase the alignment of globals with an assigned
alignment and section.

llvm-svn: 102476
 2010-04-28 00:31:12 +00:00
Gabor Greif 27b3d55194 use abstract accessors to CallInst 
llvm-svn: 101899
 2010-04-20 13:13:04 +00:00