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42 Commits

Author SHA1 Message Date
Benjamin Kramer
4bb87cbac5 SmallPtrSet: Reuse DenseMapInfo's pointer hash function instead of inventing a bad one ourselves. 
DenseMap's hash function uses slightly more entropy and reduces hash collisions
significantly.  I also experimented with Hashing.h, but it didn't gave a lot of
improvement while being much more expensive to compute.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154996 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-04-18 10:37:32 +00:00
Benjamin Kramer
2945a32ffd SmallPtrSet: Provide a more efficient implementation of swap than the default triple-copy std::swap. 
This currently assumes that both sets have the same SmallSize to keep the implementation simple,
a limitation that can be lifted if someone cares.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152143 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-03-06 20:40:02 +00:00
Jakob Stoklund Olesen
e10fff6f88 Prevent infinite growth of SmallPtrSet instances. 
Rehash but don't grow when full of tombstones.

Patch by José Fonseca!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128566 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-03-30 18:32:48 +00:00
Duncan Sands
ab4c366274 Spelling fix: consequtive -> consecutive. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125563 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-02-15 09:23:02 +00:00
Nick Lewycky
476b242fe7 Add missing standard headers. Patch by Joerg Sonnenberger! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122193 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-19 20:43:38 +00:00
Michael J. Spencer
1f6efa3996 Merge System into Support. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120298 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-29 18:16:10 +00:00
Duncan Sands
a71f0e1f2a Rename NextPowerOfTwo to RoundUpToPowerOfTwo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107297 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-30 17:24:28 +00:00
Duncan Sands
2e502577ab Clarify that the NextPowerOfTwo template is idempotent. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107286 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-30 15:29:46 +00:00
Duncan Sands
2a8bf425bd Rather than giving SmallPtrSetImpl a member field SmallArray which is magically 
replaced by a bigger array in SmallPtrSet (by overridding it), instead just use a
pointer to the start of the storage, and have SmallPtrSet pass in the value to use.
This has the disadvantage that SmallPtrSet becomes bigger by one pointer.  It has
the advantage that it no longer uses tricky C++ rules, and is clearly correct while
I'm not sure the previous version was.  This was inspired by g++-4.6 pointing out
that SmallPtrSetImpl was writing off the end of SmallArray, which it was.  Since
SmallArray is replaced with a bigger array in SmallPtrSet, the write was still to
valid memory.  But it was writing off the end of the declared array type - sounds
kind of dubious to me, like it sounded dubious to g++-4.6.  Maybe g++-4.6 is wrong
and this construct is perfectly valid and correctly compiled by all compilers, but
I think it is better to avoid the whole can of worms by avoiding this construct.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107285 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-30 15:02:37 +00:00
Duncan Sands
871dc240d0 Fix a buffer overflow noticed by gcc-4.6: zero is written into 
SmallArray[SmallSize] in the SmallPtrSetIteratorImpl, and this is
one off the end of the array.  For those who care, right now gcc
warns about writing off the end because it is confused about the
declaration of SmallArray as having length 1 in the parent class
SmallPtrSetIteratorImpl.  However if you tweak code to unconfuse
it, then it still warns about writing off the end of the array,
because of this buffer overflow.  In short, even with this fix
gcc-4.6 will warn about writing off the end of the array, but now
that is only because it is confused.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107200 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-29 20:12:02 +00:00
Duncan Sands
05b0b44f8a NextPowerOfTwo was already used to ensure that SmallSizePowTwo is a power 
of two, no need to do it a second time (NextPowerOfTwo is idempotent).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107199 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-29 20:05:34 +00:00
Bob Wilson
252968a76f Fix a comment typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96027 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-12 22:34:54 +00:00
Chandler Carruth
8b67f774e9 Move DataTypes.h to include/llvm/System, update all users. This breaks the last 
direct inclusion edge from System to Support.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85086 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 01:35:46 +00:00
Douglas Gregor
7c718222cd Make SmallPtrSet iterators real iterators 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75073 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-08 23:53:54 +00:00
Chris Lattner
8ee1b5e916 rename PointerLikeTypeInto to PointerLikeTypeTraits, add trait for 
# low bits free, and move to its own header.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67973 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-29 00:39:30 +00:00
Chris Lattner
1717f3af08 declare everything as class to avoid angering the VC++ gods. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67931 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-28 07:48:03 +00:00
Chris Lattner
6de6030718 add a traits class for SmallPtrSet that allows us to stick things that are 
"basically pointers" into it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67930 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-28 07:44:53 +00:00
Dan Gohman
5471a00977 Change several SmallPtrSetImpl members from public to protected, 
to make the encapsulation more clear.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64017 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-07 16:12:23 +00:00
Misha Brukman
3a54b3dc87 Removed trailing whitespace. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62000 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-01-09 19:25:42 +00:00
Evan Cheng
34cd4a484e Fix more -Wshorten-64-to-32 warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50659 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-05 18:30:58 +00:00
Dan Gohman
950a4c40b8 Add explicit keywords. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48801 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 22:06:05 +00:00
Chris Lattner
7ed47a1335 Don't attribute in file headers anymore. See llvmdev for the 
discussion of this change.  Boy are my fingers tired. ;-)



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45411 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-29 19:59:42 +00:00
Chris Lattner
373a733be0 make smallptrset more const and type correct, which caught a few 
minor bugs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43782 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-11-06 22:12:43 +00:00
Anton Korobeynikov
ebf0303810 Properly use const qualifiers 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41111 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-15 21:12:30 +00:00
Chris Lattner
42e4bdf257 When clearing a SmallPtrSet, if the set had a huge capacity, but the 
contents of the set were small, deallocate and shrink the set.  This
avoids having us to memset as much data, significantly speeding up
some pathological cases.  For example, this speeds up the verifier
from 0.3899s to 0.0763 (5.1x) on the testcase from PR1432 in a 
release build.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40837 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-05 07:32:14 +00:00
Owen Anderson
e992a56ae9 Allow SmallPtrSet to hold pointers to const data. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40556 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-27 18:07:02 +00:00
Reid Spencer
845b31de0c Unbreak the build by putting calls to free into the implementation file and 
having that implementation file #include <cstdlib>.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39952 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-17 02:16:12 +00:00
Owen Anderson
1629a1fa87 Use realloc() to (potentially) resize the contents of SmallPtrSet in place. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39926 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-16 21:27:44 +00:00
Owen Anderson
4d6f96d699 Make the assignment operator for SmallPtrSet return a reference, and fix a long-standing bug in the copy 
ctor while I'm at it.

Thanks to Chris Lattner for help with this patch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38470 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-09 20:59:01 +00:00
Chris Lattner
95fd3189f8 work around an aparent gcc name resolution bug by 
detemplatizing this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38461 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-09 17:11:53 +00:00
Chris Lattner
91f0158d4d implement operator= for smallptrset 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38460 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-09 16:54:03 +00:00
Jeff Cohen
ac58a16f85 Fix PR1329. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36016 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-14 21:50:21 +00:00
Chris Lattner
086f186267 add range version of insert() 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35572 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-02 01:21:19 +00:00
Chris Lattner
ab8fea5283 add iterator range version of ctor. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34899 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-04 04:04:43 +00:00
Chris Lattner
155b6220f7 Fix PR1234 by working around a compiler bug. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34845 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-02 18:16:29 +00:00
Chris Lattner
e237cf934f do not let the table fill up with tombstones. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33973 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-07 01:11:25 +00:00
Chris Lattner
ea830ef21f provide a definition for uintptr_t 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33592 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-27 23:52:33 +00:00
Chris Lattner
894d264f3e add some missing API 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33583 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-27 08:19:03 +00:00
Chris Lattner
0b930852cf implement SmallPtrSet::erase 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33581 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-27 07:59:10 +00:00
Chris Lattner
af3056c97e Fix a limitation of SmallPtrSet. Before it would assert if the smallsize 
was not a power of two.  Now it rounds up to the next power of two internally.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33580 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-27 07:52:27 +00:00
Chris Lattner
18b69106b7 add some comments on the algorithm 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33579 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-27 07:24:51 +00:00
Chris Lattner
c95dc987e9 Add a new SmallSet ADT specialized for pointers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33577 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-27 07:10:46 +00:00