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Author SHA1 Message Date
Chris Lattner
789162a309 Remove the dead TD argument to CanEvaluateZExtd, and add a 
new BitsToClear result which allows us to start promoting
expressions that end with a lshr-by-constant.  This is
conservatively correct and better than what we had before
(see testcases) but still needs to be extended further.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93144 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-11 03:32:00 +00:00
Chris Lattner
8cf4f6f3dd improve comments, remove dead TD argument to CanEvaluateSExtd. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93143 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-11 02:43:35 +00:00
Chris Lattner
11ea812424 teach sext optimization to handle truncs from types that are not 
the dest of the sext.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93128 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 20:30:41 +00:00
Chris Lattner
9ee947c224 teach zext optimization how to deal with truncs that don't come from 
the zext dest type.  This allows us to handle test52/53 in cast.ll,
and allows llvm-gcc to generate much better code for PR4216 in -m64
mode:

_test_bitfield:                                             ## @test_bitfield
	orl	$32962, %edi
	movl	%edi, %eax
	andl	$-25350, %eax
	ret

This also fixes a bug handling vector extends, ensuring that the
mask produced is a vector constant, not an integer constant.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93127 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 20:25:54 +00:00
Chris Lattner
859c372e04 fix a buggy assertion, CreateIntegerCast should allow 
integer vectors as well as just integers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93126 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 20:21:42 +00:00
Mikhail Glushenkov
0d75d874bf Suppress a warning on gcc 4.4. 
warning: suggest parentheses around ‘&&’ within ‘||’.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93121 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 18:48:49 +00:00
Chris Lattner
aa9c894523 simplify CanEvaluateSExtd to return a bool now that we have a 
simpler profitability predicate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93111 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 07:57:20 +00:00
Chris Lattner
6954ceec1a the NumCastsRemoved argument to CanEvaluateSExtd is dead, remove it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93110 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 07:42:21 +00:00
Chris Lattner
dde5ee5d37 now that the cost model has changed, we can always consider 
elimination of a sign extend to be a win, which simplifies 
the client of CanEvaluateSExtd, and allows us to eliminate
more casts (examples taken from real code).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93109 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 07:40:50 +00:00
Victor Hernandez
24e64df7ec Compute isFunctionLocal in MDNode ctor or via argument in new function getWhenValsUnresolved(). 
Document PFS argument to ParseValID() and ConvertGlobalOrMetadataValIDToValue().



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93108 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 07:14:18 +00:00
Chris Lattner
f4fb91181c change the preferred canonical form for a sign extension to be 
lshr+ashr instead of trunc+sext.  We want to avoid type 
conversions whenever possible, it is easier to codegen expressions
without truncates and extensions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93107 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 07:08:30 +00:00
Chris Lattner
abff82d99e fix indentation of switch statements, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93106 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 06:59:55 +00:00
Chris Lattner
6091e0289b fix pasto that broke bootstrap. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93105 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 06:50:04 +00:00
Chris Lattner
9e390ddf91 simplify CanEvaluateZExtd now that we don't care about the number of 
bits known clear in the result and don't care about the # casts 
eliminated.  TD is also dead but keeping it for now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93098 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 02:50:04 +00:00
Chris Lattner
5324d80283 two changes: 
1) don't try to optimize a sext or zext that is only used by a trunc, let
   the trunc get optimized first.  This avoids some pointless effort in
   some common cases since instcombine scans down a block in the first pass.
2) Change the cost model for zext elimination to consider an 'and' cheaper
   than a zext.  This allows us to do it more aggressively, and for the next
   patch to simplify the code quite a bit.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93097 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 02:39:31 +00:00
Chris Lattner
d26c9e183e enhance CanEvaluateZExtd to handle shift left and sext, allowing 
more expressions to be promoted and casts eliminated.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93096 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 02:22:12 +00:00
Chris Lattner
3f7dc880c4 remove an xform subsumed by EvaluateInDifferentType. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93095 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 01:35:55 +00:00
Julien Lerouge
5c1735a4df Fix nondeterministic behavior. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93093 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 01:07:22 +00:00
Chris Lattner
4f37978b90 clean up this xform by using m_Trunc. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93092 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 01:04:31 +00:00
Chris Lattner
d84dfa43f2 inline and remove the rest of commonIntCastTransforms. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93091 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 01:00:46 +00:00
Chris Lattner
75215c9e39 Inline the expression type promotion/demotion stuff out of 
commonIntCastTransforms into the callers, eliminating a switch,
and allowing the static predicate  methods to be moved down to
live next to the corresponding function.  No functionality 
change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93089 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-10 00:58:42 +00:00
Chris Lattner
10bc755d9f hopefully unbreak the ocaml bindings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93082 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 23:25:21 +00:00
Chris Lattner
76ef298310 add 3 passes which have been added but aren't used afaik. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93080 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 22:30:40 +00:00
Chris Lattner
d686c8e73f "In order to ease automatic bindings generation, it would be helpful if boolean values were distinguishable from integers. The attached patch introduces "typedef int LLVMBool;", and uses LLVMBool instead of int throughout the C API, wherever a boolean value is called for." 
Patch by James Y Knight!



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93079 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 22:27:07 +00:00
Jeffrey Yasskin
95fa80af6f Clarify the requirements for a "tail call" to actually be optimized into a 
jump.  People clearly weren't finding the extra requirements in
CodeGenerator.html.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93070 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 19:44:16 +00:00
Chris Lattner
aa38865b6b fix bogus test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93069 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 19:24:49 +00:00
Chris Lattner
afab1df368 fix bogus test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93068 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 19:24:18 +00:00
Chris Lattner
2fdf8dbed5 fix PR5983, reject function bodies with no blocks per the grammar. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93067 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 19:20:07 +00:00
Chris Lattner
873187c042 improve documentation for linkonce to be less confusing. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93066 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 19:15:14 +00:00
Jeffrey Yasskin
a77169dbeb Fix http://llvm.org/PR5729: x86-64 tail calls were putting their targets into 
R11, and then asserting that the target was in R9.  Since R9 isn't reserved for
the target anymore, and is used as an argument, this patch changes the
assertion.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93065 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 18:56:43 +00:00
Chris Lattner
6d7d735fea 2010 is upon us. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93062 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 18:40:31 +00:00
Dan Gohman
3073329c53 Use WriteAsOperand instead of getName() to print loop header names, 
so that unnamed blocks are handled.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93059 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 18:17:45 +00:00
Dan Gohman
7a523dde57 Tighten up the vim LLVM IR syntax highlighting regex for labels, and add a 
highlighting rule for identifiers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93056 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 17:22:48 +00:00
Dan Gohman
acb75a9d70 Set the vim auto-indent setting for open braces after case statements to 
follow LLVM source convention.

Before:
  case X: {
            stuff;
          }

After:
  case X: {
    stuff;
  }


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93055 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 17:15:21 +00:00
David Chisnall
3472246ede Fixed linking of modules containing aliases to constant bitcasts. Existing behaviour first tried to replace the aliases with the global that they aliased (rather than the bitcast), causing a crash on an assert because the types didn't match. When this was fixed, it then did the same thing creating the new alias (creating an alias with a different type to its aliasee). 
Linking modules containing aliases to GEPs is still not quite right.  GEPs that are equivalent to bitcasts will be replaced by bitcasts, GEPs that are not will just break.  Aliases to GEPs that are not equivalent to bitcasts are horribly broken anyway (it might be worth adding an assert when creating the alias to prevent these being created; they just cause problems later).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93052 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 16:27:31 +00:00
Duncan Sands
1fa8b00b30 Suppress use of uninitialized variable warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93046 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 08:30:33 +00:00
Chris Lattner
c2d1b6949c only factor from expressions whose uses are empty and whose 
base is the right expression type.  This fixes PR5981.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93045 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 06:01:36 +00:00
Dan Gohman
d199636039 Revert an earlier change to SIGN_EXTEND_INREG for vectors. The VTSDNode 
really does need to be a vector type, because
TargetLowering::getOperationAction for SIGN_EXTEND_INREG uses that type,
and it needs to be able to distinguish between vectors and scalars.

Also, fix some more issues with legalization of vector casts.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93043 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 02:13:55 +00:00
Chris Lattner
70644e92d8 clean up this code, add a fixme. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93042 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 02:02:37 +00:00
Devang Patel
87df867fd7 Delete NamedMDSymTable while destrucing Module. 
Disable  copy ctor and operator= for NamedMDSymTable. Hide typedef that should be public.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93041 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 01:44:59 +00:00
Dale Johannesen
d2035203a0 Add DEBUG_DECLARE. Not used yet. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93040 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 01:24:25 +00:00
Devang Patel
380e80fb53 NamedMDNode is never used so there is no need to enumerate it here. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93039 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 01:24:03 +00:00
Julien Lerouge
c5dd34209b Fix nondeterministic behavior. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93038 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 01:06:49 +00:00
Devang Patel
7f9664699e NamedMDNode element is either null or MDNode. Otherwise this is a malformed NamedMDNode record. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93037 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 01:02:22 +00:00
Devang Patel
8fba578be7 Derive NamedMDNode from Value. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93032 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 00:30:14 +00:00
Evan Cheng
54e146b935 Dan pointed out checking whether a node is dead by comparing its opcode to ISD::DELETED_NODE is not safe. Use a DAGUpdateListener to remove dead nodes from work list instead. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93031 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-09 00:21:08 +00:00
Dale Johannesen
87563b3937 Add DEBUG_VALUE. Not used yet. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93030 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-08 23:51:25 +00:00
Evan Cheng
306b4cafc1 Fix a critical bug in 64-bit atomic operation lowering for 32-bit. The results of the cmpxchg8b instructions are being thrown away when it branches back to the top of the checking loop. This means the loop always compares against the old value and this can result in a dead lock. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93028 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-08 23:41:50 +00:00
Eric Christopher
d003c5b3d7 Grammar thinko. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93027 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-08 21:42:39 +00:00
Eric Christopher
4d1f58861d Remove unnecessary dyn_cast and add a comment. Part of a WIP. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93026 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-08 21:37:11 +00:00