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1802 Commits

Author SHA1 Message Date
Owen Anderson
84c29a096b Re-apply r111568 with a fix for the clang self-host. 
llvm-svn: 111665
 2010-08-20 18:24:43 +00:00
Owen Anderson
3323651ec7 Previous revert failed to remove this file. 
llvm-svn: 111582
 2010-08-19 23:45:15 +00:00
Owen Anderson
43057cd56a Revert r111568 to unbreak clang self-host. 
llvm-svn: 111571
 2010-08-19 23:25:16 +00:00
Owen Anderson
bb723b228a When a set of bitmask operations, typically from a bitfield initialization, only modifies the low bytes of a value, 
we can narrow the store to only over-write the affected bytes.

llvm-svn: 111568
 2010-08-19 22:15:40 +00:00
Kenneth Uildriks
d4b6ab9888 Fixed and reactivated a partial specialization test 
llvm-svn: 111516
 2010-08-19 12:42:38 +00:00
Chris Lattner
3c603024bb Fix PR7755: knowing something about an inval for a pred 
from the LHS should disable reconsidering that pred on the
RHS.  However, knowing something about the pred on the RHS
shouldn't disable subsequent additions on the RHS from
happening.

llvm-svn: 111349
 2010-08-18 03:14:36 +00:00
Eric Christopher
51edc7b7e1 Temporarily revert r110987 as it's causing some miscompares in 
vector heavy code.  I'll re-enable when we've tracked down the problem.

llvm-svn: 111318
 2010-08-17 22:55:27 +00:00
Dan Gohman
5047ca0c02 When rotating loops, put the original header at the bottom of the 
loop, making the resulting loop significantly less ugly.  Also, zap
its trivial PHI nodes, since it's easy.

llvm-svn: 111255
 2010-08-17 17:39:21 +00:00
Dan Gohman
250b754428 Instead, teach SimplifyCFG to trim non-address-taken blocks from 
indirectbr destination lists.

llvm-svn: 111122
 2010-08-16 14:41:14 +00:00
Dan Gohman
aa445c0751 LoopSimplify shouldn't split loop backedges that use indirectbr. PR7867. 
llvm-svn: 111061
 2010-08-14 00:43:09 +00:00
Dan Gohman
4a63fad976 Teach SimplifyCFG how to simplify indirectbr instructions. 
- Eliminate redundant successors.
 - Convert an indirectbr with one successor into a direct branch.

Also, generalize SimplifyCFG to be able to be run on a function entry block.
It knows quite a few simplifications which are applicable to the entry
block, and it only needs a few checks to avoid trouble with the entry block.

llvm-svn: 111060
 2010-08-14 00:29:42 +00:00
Nate Begeman
2a0ca3e937 Reapply this transformation now that it is passing the external test which it previously failed. 
llvm-svn: 110987
 2010-08-13 00:17:53 +00:00
Chris Lattner
363226dfe8 fix PR7876: If ipsccp decides that a function's address is taken 
before it rewrites the code, we need to use that in the post-rewrite pass.

llvm-svn: 110962
 2010-08-12 22:25:23 +00:00
Eric Christopher
ac40d49c70 Temporarily revert 110737 and 110734, they were causing failures 
in an external testsuite.

llvm-svn: 110905
 2010-08-12 07:01:22 +00:00
Nate Begeman
3ec892c167 Add test for recent instcombine vector shuffle enhancement 
llvm-svn: 110737
 2010-08-10 21:58:00 +00:00
Eli Friedman
f99e7e6643 PR7853: fix a silly mistake introduced in r101899, and add a test to make sure 
it doesn't regress again.

llvm-svn: 110597
 2010-08-09 20:49:43 +00:00
Dan Gohman
c53ee449a5 Move x86-specific tests out of test/Transforms/LoopStrengthReduce and 
into test/CodeGen/X86, so that they aren't run when the x86 target is
not enabled.

Fix uglygep.ll to not be x86-specific.

llvm-svn: 110343
 2010-08-05 17:04:15 +00:00
Dan Gohman
3619660529 Make instcombine set explicit alignments on load or store 
instructions with alignment 0, so that subsequent passes don't
need to bother checking the TargetData ABI size manually.

llvm-svn: 110128
 2010-08-03 18:20:32 +00:00
Peter Collingbourne
ddaaf40d24 Add an atomic lowering pass 
llvm-svn: 110113
 2010-08-03 16:19:16 +00:00
Owen Anderson
8f306a779b Re-apply the infamous r108614, with a fix pointed out by Dirk Steinke. 
llvm-svn: 110036
 2010-08-02 09:32:13 +00:00
Daniel Dunbar
0b636a24c7 Speculatively revert r108614, "Another attempt at getting the clang self-host to 
like my instcombine patch.", in an attempt to fix Clang i386 bootstrap.
 - Also PR7719.

llvm-svn: 109953
 2010-07-31 19:51:11 +00:00
Owen Anderson
bb4c4b59a4 Fix a test with malformed IR. Not sure why this didn't fail before. 
llvm-svn: 109422
 2010-07-26 18:44:56 +00:00
Dan Gohman
cd83870faf Fix SCEVExpander::visitAddRecExpr so that it remembers the induction variable 
it inserted rather than using LoopInfo::getCanonicalInductionVariable to
rediscover it, since that doesn't work on non-canonical loops. This fixes
infinite recurrsion on such loops; PR7562.

llvm-svn: 109419
 2010-07-26 18:28:14 +00:00
Dan Gohman
b0961f2443 Avoid depending on LCSSA implicitly pulling in LoopSimplify. 
llvm-svn: 109410
 2010-07-26 18:00:43 +00:00
Owen Anderson
3ccd81864f Testcase for r108687. 
llvm-svn: 108689
 2010-07-19 08:14:26 +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
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
Tobias Grosser
3d84c9c793 LoopSimplify does not update domfrontier correctly. 
This fixes PR7649.

llvm-svn: 108513
 2010-07-16 05:59:45 +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
c6eefe4d4e Fix this test. 
llvm-svn: 108491
 2010-07-16 01:28:45 +00:00
Dan Gohman
fbbdfcaea7 Fix the order that SCEVExpander considers add operands in so that 
it doesn't miss an opportunity to form a GEP, regardless of the
relative loop depths of the operands. This fixes rdar://8197217.

llvm-svn: 108475
 2010-07-15 23:38:13 +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
Chris Lattner
19eff2a9f6 Fix PR7647, handling the case when 'To' ends up being 
mutated by recursive simplification.  This also enhances
ReplaceAndSimplifyAllUses to actually do a real RAUW
at the end of it, which updates any value handles
pointing to "From" to start pointing to "To".  This
seems useful for debug info and random other VH users.

llvm-svn: 108415
 2010-07-15 06:36:08 +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
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
Benjamin Kramer
c719e8ae9e Revert r108141 again, sigh. 
llvm-svn: 108148
 2010-07-12 14:42:04 +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
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
Chris Lattner
25eea4db66 fix PR7311 by avoiding breaking casts when a bitcast from scalar->vector 
is involved.

llvm-svn: 108117
 2010-07-12 01:19:22 +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
Chris Lattner
fd4a09fc0a fix PR7429, a crash turning a load from a string into a float. 
llvm-svn: 108113
 2010-07-12 00:22:51 +00:00
Chris Lattner
f8feba368c convert to filechecconvert to filecheckk 
llvm-svn: 108112
 2010-07-12 00:21:10 +00:00
Chris Lattner
9338b0a1e2 merge two tests. 
llvm-svn: 108111
 2010-07-12 00:19:47 +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
Chris Lattner
efa3c824cc Fix the second half of PR7437: scalarrepl wasn't preserving 
address spaces when SRoA'ing memcpy's.

llvm-svn: 107846
 2010-07-08 00:27:05 +00:00
Dale Johannesen
744c74c444 Prevent test from hanging waiting for input. 
llvm-svn: 107446
 2010-07-01 22:57:11 +00:00