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7180 Commits

Author SHA1 Message Date
Dan Gohman
c88c1a4581 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108424 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-15 15:14:45 +00:00
Owen Anderson
96fe621e07 Reapply r108378, with bugfixes, testcase, and improved comment formatting. 
This now passes LIT, nighty test, and llvm-gcc bootstrap on my machine.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108422 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-15 15:00:23 +00:00
Nick Lewycky
706f50820c This is a full sentence. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108418 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-15 06:51:22 +00:00
Nick Lewycky
664040a03c Disable aliases on all platforms. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108417 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-15 06:48:56 +00:00
Chris Lattner
35a939b97d 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108414 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-15 06:06:04 +00:00
Eli Friedman
5e84e8e52a Speculatively revert r108378; may be causing bootstrap failures. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108389 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-15 00:33:00 +00:00
Owen Anderson
bd129a7460 Add instcombine transforms to optimize tests of multiple bits of the same value into a single larger comparison. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108378 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-14 23:33:51 +00:00
Owen Anderson
e84178a0bd 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).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108351 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-14 19:52:16 +00:00
Chris Lattner
07c9b64719 revert r108320, I see the failures now... 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108322 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-14 06:16:35 +00:00
Chris Lattner
7e185af930 reapply benjamin's instcombine patch, I don't see anything wrong with it and can't repro any problems with a manual self-host. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108320 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-14 05:59:13 +00:00
Eric Christopher
f0193ed8de Grammar. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108252 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-13 18:27:13 +00:00
Duncan Sands
d0d3ccc827 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108241 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-13 15:41:41 +00:00
Benjamin Kramer
c9fe6374b7 Nope, still breaks the release selfhost bots :( 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108153 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 16:38:48 +00:00
Benjamin Kramer
8fd437c43f Reapply the "or" half of r108136, which seems to be less problematic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108152 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 16:15:48 +00:00
Gabor Greif
a9b8338bfa cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108150 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 15:48:26 +00:00
Benjamin Kramer
e2d07b5208 Revert r108141 again, sigh. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108148 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 14:42:04 +00:00
Gabor Greif
40119ceeec cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108147 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 14:15:58 +00:00
Gabor Greif
a53029b1fc cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108146 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 14:15:10 +00:00
Gabor Greif
65b9212d34 cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108145 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 14:14:03 +00:00
Gabor Greif
aaaaa02a93 cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108144 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 14:13:15 +00:00
Gabor Greif
b7df500063 cache results of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108143 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 14:12:11 +00:00
Gabor Greif
ee1f44fba3 cache results of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108142 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 14:10:24 +00:00
Benjamin Kramer
98a8206e58 Reapply 108136 with an ugly pasto fixed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108141 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 13:44:00 +00:00
Benjamin Kramer
ad854f0764 Move optimization to avoid redundant matching. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108140 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 13:34:22 +00:00
Benjamin Kramer
0cc4ed1ca5 Revert r108136 until I figure out why it broke selfhost. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108139 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 12:35:49 +00:00
Gabor Greif
110b75aa75 cache dereferenced iterators 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108138 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 12:03:02 +00:00
Gabor Greif
639e9e47a2 recommit r108131 (hich has been backed out in r108135) with a fix 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108137 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 12:02:10 +00:00
Benjamin Kramer
4fc719e607 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108136 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 11:54:45 +00:00
Gabor Greif
e99e077522 back out r108131 (of TailDuplication.cpp) for now, it causes a buildbot failure 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108135 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 11:32:39 +00:00
Gabor Greif
fc41f90817 cache dereferenced iterators 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108134 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 11:19:24 +00:00
Gabor Greif
625398343e cache dereferenced iterators 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108133 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 10:59:23 +00:00
Gabor Greif
f1b2874c68 cache dereferenced iterators 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108132 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 10:49:54 +00:00
Gabor Greif
a8b9df7bd9 cache dereferenced iterators 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108131 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 10:36:48 +00:00
Duncan Sands
3472766f9e Convert some tab stops into spaces. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108130 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 08:16:59 +00:00
Chris Lattner
5a30a8574c make the prototypes for CreateMalloc and CreateFree more consistent. Patch 
by Hans Vandierendonck from PR7605


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108116 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 00:57:28 +00:00
Chris Lattner
0a96144aac 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108114 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 00:47:34 +00:00
Duncan Sands
24080a9878 The accumulator tail recursion transform claims to work for any associative 
operation, but the way it's implemented requires the operation to also be
commutative.  So add a check for commutativity (and tweak the corresponding
comments).  This makes no difference in practice since every associative
LLVM instruction is also commutative!  Here's an example to show the need
for commutativity: the accum_recursion.ll testcase calculates the factorial
function.  Before the transformation the result of a call is
  ((((1*1)*2)*3)...)*x
while afterwards it is
  (((1*x)*(x-1))...*2)*1
which clearly requires both associativity and commutativity of * to be equal
to the original.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108056 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-10 20:31:42 +00:00
Gabor Greif
e664267ae7 cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107990 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-09 16:51:20 +00:00
Gabor Greif
9085fcab82 cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107984 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-09 16:31:08 +00:00
Gabor Greif
bf2eefdb0d cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107983 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-09 16:26:41 +00:00
Gabor Greif
e80ba4f884 cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107981 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-09 16:17:52 +00:00
Gabor Greif
7656018c22 cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107976 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-09 15:40:10 +00:00
Gabor Greif
7556cf541b cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107975 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-09 15:25:42 +00:00
Gabor Greif
5896935423 cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107974 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-09 15:25:09 +00:00
Gabor Greif
fc36c0f21f cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107972 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-09 15:01:36 +00:00
Gabor Greif
1d3ae029c4 cache result of operator* (found by inspection) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107971 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-09 14:48:08 +00:00
Gabor Greif
0814985887 cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107969 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-09 14:36:49 +00:00
Gabor Greif
a29742df5f cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107968 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-09 14:29:14 +00:00
Gabor Greif
5417a03b55 cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107966 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-09 14:18:23 +00:00
Gabor Greif
9672414017 cache operator*'s result (in multiple functions) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107965 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-09 14:02:13 +00:00