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45baf4191b
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3516 Commits

Author SHA1 Message Date
Dan Gohman
45baf4191b Delete this comment. The behavior of struct loads and stores with 
respect to padding bytes isn't something that the dependence text
needs to spell out.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102910 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-03 14:58:14 +00:00
Dan Gohman
b532816ac9 Describe invoke instruction dependencies. Generalize the text for 
terminator instructions so that it applies to all terminators with
multiple successors, including invoke.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102909 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-03 14:55:22 +00:00
Dan Gohman
855abed3cb Say "operations" instead of "instructions", as nsw can be applied to 
constant expressions as well as instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102908 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-03 14:51:43 +00:00
Duncan Sands
57b6e9eb6c Remove the -enable-sjlj-eh option, which doesn't do anything. 
Remove the -enable-eh option which is only used by the JIT,
and replace it with -jit-enable-eh.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102865 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-02 15:36:26 +00:00
David Chisnall
27195a5831 Fixed @ctor / @dtor the wrong way around in last commit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102741 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-30 19:27:35 +00:00
David Chisnall
e31e9966ec Added a brief explanation of @llvm.global_{c,d}tors. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102740 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-30 19:23:49 +00:00
Dan Gohman
34b3d993e4 Rewrite the section on trap values to contain a generic description 
of dependence and define trap values in terms of dependence, instead
of trying to cover the concept with a flurry of ad-hoc rules.

The dependence model isn't complete yet, but it's already much more
rigorous than the description it replaces.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102479 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-28 00:49:41 +00:00
Dan Gohman
1c70c00c28 Fix spelling errors. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102478 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-28 00:36:01 +00:00
Chris Lattner
2d4b8ee1d9 further clarify alignment of globals, fix instcombine 
to not increase the alignment of globals with an assigned
alignment and section.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102476 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-28 00:31:12 +00:00
Chris Lattner
ce99fa9e26 improve the global variable alignment description. 
it is not generally valid for targets to overalign
them when an alignment is specified.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102474 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-28 00:13:42 +00:00
Chris Lattner
77640feed7 fix wordo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102418 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-27 07:28:11 +00:00
Chris Lattner
de076819e4 remove some comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102417 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-27 06:57:10 +00:00
Dan Gohman
ae11c3f83e Integrate Jeffery Yasskin's suggestions with respect to 
traps flowing through memory references, add some text to
better cover phi nodes and externally-visible side effects,
add an example of instructions being control-dependent
on a trap value, and reword some of the existing trap rules.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102399 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-26 23:36:52 +00:00
Jeffrey Yasskin
93e066d0e2 Consolidate the description of volatile operations, now that some of the 
intrinsics have volatile semantics in addition to the load and store
instructions.  


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102384 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-26 21:21:24 +00:00
Dan Gohman
c30f6e1c89 Branching or switching on trap transfers imminent undefined behavior 
onto control-dependent instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102381 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-26 20:54:53 +00:00
Gabor Greif
28034cde44 add some typewriter tags 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102378 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-26 20:46:03 +00:00
Dan Gohman
c68ce066a5 Fix HTML errors that Jeffery Yasskin noticed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102376 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-26 20:21:21 +00:00
Chris Lattner
095539f97c wrap some long lines. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102354 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-26 17:42:18 +00:00
Chris Lattner
7c8e7965e1 add GHC, thanks to David Terei 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102352 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-26 17:38:10 +00:00
Gabor Greif
e32adf53b2 another typo pointed out by sajd 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102319 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-25 21:30:22 +00:00
Gabor Greif
1440dbe4c2 fix two typos pointed out by sajd 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102318 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-25 21:27:54 +00:00
David Chisnall
8e0bd80e38 Added bullet about GNUstep Objective-C ABI support to the Clang section of the release notes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102309 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-25 19:13:33 +00:00
Dan Gohman
698cbcb0a4 PHI nodes also do not necessarily return trap with a trap operand. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102278 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-24 22:15:58 +00:00
Nick Lewycky
1f048649e3 Fix typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102276 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-24 22:01:40 +00:00
Dan Gohman
27ef9976c2 Switch getelementptr inbounds and sdiv exact from undef to trap. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102175 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-23 15:23:32 +00:00
Dan Gohman
fff6c5332f Add an initial description of a new concept: trap values, and change 
the definition of the nsw and nuw flags to make use of it.

nsw was introduced to help optimizers answer yes to the following:

  // Can we change i from i32 to i64 to eliminate the cast inside the loop?
  for (int i = 0; i < n; ++i) A[i] *= 0.1;

  // Can we assume that this loop will eventually terminate?
  for (int i = 0; i <= n; ++i) A[i] *= 0.1;

In its current form, it isn't truly sufficient for either.

In the first case, if the increment overflows, it'll still have some
valid i32 value; sign-extending it will produce a value which is 33
homogeneous sign bits trailed by 31 independent undef bits. If i is
promoted to i64, it won't have those same values when it reaches that
point. (The compiler could recover here by reasoning about how i is
used by the load, but that's a lot more complicated and isn't always
possible.)

In the second case, there is no value for i which will be greater than
n, so having the increment return undef on overflow doesn't help.

Trap values are a formalization of some existing concepts that we have
about LLVM IR, and give the optimizers a better basis for answering yes
to both questions above.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102140 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 23:14:21 +00:00
Chris Lattner
3a1d4cfc38 add macruby back 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102132 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 21:34:16 +00:00
Dan Gohman
9c675f14c1 Add a blurb about the new LSR. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102126 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 20:50:43 +00:00
Nick Lewycky
009364ebcf The -condprop pass has been deleted. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102125 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 20:48:34 +00:00
Dan Gohman
d64d12dfcb The post-RA scheduler is currently off by default on x86. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102124 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 20:47:28 +00:00
Douglas Gregor
f720a4edb0 Add some verbiage about Clang to the 2.7 release notes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102121 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 20:42:40 +00:00
Jim Grosbach
41a776631d Add mention of ARM atomic builtin support 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102103 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 18:33:31 +00:00
Jim Grosbach
269e0fed84 Update ARM frame index scavenging description 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102101 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 18:28:43 +00:00
Chris Lattner
cb28286b7b remove dupe 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102100 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 18:26:17 +00:00
Chris Lattner
83cd35aff9 reword my incoherent babble into something that makes sense 
from Wesley Peck!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102096 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 17:39:38 +00:00
Chris Lattner
fb1a739202 two more projects. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102095 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 17:28:36 +00:00
Chris Lattner
cd062cd54c add some notes from Matthieu Moy! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102093 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 17:25:00 +00:00
Chris Lattner
ca73cea8a2 improve tblgen doc, pointed out by Zhongxing. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102072 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 16:45:27 +00:00
Wesley Peck
1f433615b4 Fixing a typo in the "Clang project" section of the release notes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102064 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 14:19:00 +00:00
Wesley Peck
a0c4484bce Small fix to the "Other Improvements and New Features" section of the release notes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102063 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 13:53:54 +00:00
Wesley Peck
c0287baced Fixing small typos in the "New Useful APIs" section of the release notes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102062 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 13:50:46 +00:00
Wesley Peck
9e385b1367 Fixing small typos in the "ARM Target Improvements" section of the release notes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102061 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 13:43:14 +00:00
Wesley Peck
640604ae63 Rewording the "generated debug information" paragraph in the "Interpreter and JIT Improvements" section of the release notes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102060 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 13:36:27 +00:00
Wesley Peck
68d1fe9700 Reworking the wording of the "target data string" paragraph in the "Optimizer Improvments" section of the release notes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102059 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 13:28:34 +00:00
Gabor Greif
ed38745a2a <pre> seems to close <p> 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102057 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 10:25:23 +00:00
Gabor Greif
ee2187a38d the validator coughed up some problems, most of them fixed 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102056 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 10:21:43 +00:00
Gabor Greif
c8b3af9f5f shorten link 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102055 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 10:11:24 +00:00
Chris Lattner
f455529b9e static analyzer has its own section 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102054 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 06:39:56 +00:00
Chris Lattner
8cdd7939ad add mc and static analyzer blurbs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102053 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 06:38:11 +00:00
Chris Lattner
914ce46040 another checkpoint. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102052 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 06:28:20 +00:00