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166 Commits

Author SHA1 Message Date
Edward O'Callaghan
4b197b8908 Reverting patch in revision 89758, initial attempt at fixing PR5373 has proven to be bogus. 
llvm-svn: 89844
 2009-11-25 05:38:41 +00:00
Edward O'Callaghan
8c1cd4fdbc Fix for PR5373, Credit to Jakub Staszak. 
llvm-svn: 89758
 2009-11-24 11:51:52 +00:00
Chris Lattner
903ae55e1c remove a bunch of extraneous LLVMContext arguments 
from various APIs, addressing PR5325.

llvm-svn: 86231
 2009-11-06 04:27:31 +00:00
Dan Gohman
3c155aa3cd Update various Loop optimization passes to cope with the possibility that 
LoopSimplify form may not be available.

llvm-svn: 86175
 2009-11-05 21:11:53 +00:00
Chris Lattner
0ee6bbbeb1 if CostMetrics says to never duplicate some code, don't unswitch a loop. 
This prevents unswitching from duplicating indbr's.

llvm-svn: 85705
 2009-11-01 03:42:55 +00:00
Dan Gohman
ea9ddb0313 Restore LoopUnswitch's block-oriented threshold. LoopUnswitch now checks both 
the estimated code size and the number of blocks when deciding whether to
do a non-trivial unswitch. This protects it from some very undesirable
worst-case behavior on large numbers of loop-unswitchable conditions, such
as in the testcase in PR5259.

llvm-svn: 84661
 2009-10-20 20:06:09 +00:00
Devang Patel
89ef6dcb54 Use isVoidTy() 
llvm-svn: 84118
 2009-10-14 17:29:00 +00:00
Devang Patel
81485d992b Check void type before using RAUWd. 
llvm-svn: 84049
 2009-10-13 22:56:32 +00:00
Devang Patel
20d88f9e16 Do not check use_empty() before replaceAllUsesWith(). This gives ValueHandles a chance to get properly updated. 
llvm-svn: 84033
 2009-10-13 21:41:20 +00:00
Dan Gohman
c5a7668904 Use the new CodeMetrics class to compute code size instead of 
manually counting instructions.

llvm-svn: 84016
 2009-10-13 20:12:23 +00:00
Dan Gohman
d01c6196f4 Make LoopUnswitch's cost estimation count Instructions, rather than 
BasicBlocks, so that it doesn't blindly procede in the presence of
large individual BasicBlocks. This addresses a class of code-size
expansion problems.

llvm-svn: 83992
 2009-10-13 17:50:43 +00:00
Mike Stump
e80b38595c Reflow comment. 
llvm-svn: 81361
 2009-09-09 17:57:16 +00:00
Dan Gohman
6fb286fc2e Fix an 80-column violation. 
llvm-svn: 81354
 2009-09-09 17:17:19 +00:00
Dan Gohman
cdaa08e706 Re-apply r80926, with fixes: keep the domtree informed of new blocks 
that get created during loop unswitching, and fix SplitBlockPredecessors'
LCSSA updating code to create new PHIs instead of trying to just move
existing ones.

Also, optimize Loop::verifyLoop, since it gets called a lot. Use
searches on a sorted list of blocks instead of calling the "contains"
function, as is done in other places in the Loop class, since "contains"
does a linear search. Also, don't call verifyLoop from LoopSimplify or
LCSSA, as the PassManager is already calling verifyLoop as part of
LoopInfo's verifyAnalysis.

llvm-svn: 81221
 2009-09-08 15:45:00 +00:00
Evan Cheng
a191202da5 Revert r80926. It causes loop unswitch assertion and slow down some JIT tests significantly. 
llvm-svn: 81101
 2009-09-06 02:26:10 +00:00
Dan Gohman
7296225414 Add a verifyAnalysis to LoopInfo, LoopSimplify, and LCSSA form that verify 
that these passes are properly preserved.

Fix several transformation passes that claimed to preserve LoopSimplify
form but weren't.

llvm-svn: 80926
 2009-09-03 16:31:42 +00:00
Chris Lattner
5f54c5bd1c eliminate VISIBILITY_HIDDEN from Transforms/Scalar. PR4861 
llvm-svn: 80766
 2009-09-02 06:11:42 +00:00
Chris Lattner
01dae858b6 eliminate the "Value" printing methods that print to a std::ostream. 
This required converting a bunch of stuff off DOUT and other cleanups.

llvm-svn: 79819
 2009-08-23 04:37:46 +00:00
Owen Anderson
9df206d02d Push LLVMContexts through the IntegerType APIs. 
llvm-svn: 78948
 2009-08-13 21:58:54 +00:00
Owen Anderson
d0e6352c97 Move getTrue() and getFalse() to 2.5-like APIs. 
llvm-svn: 77685
 2009-07-31 17:39:07 +00:00
Owen Anderson
93ccaf5c60 Move more code back to 2.5 APIs. 
llvm-svn: 77635
 2009-07-30 23:03:37 +00:00
Daniel Dunbar
8496064116 More migration to raw_ostream, the water has dried up around the iostream hole. 
- Some clients which used DOUT have moved to DEBUG. We are deprecating the
   "magic" DOUT behavior which avoided calling printing functions when the
   statement was disabled. In addition to being unnecessary magic, it had the
   downside of leaving code in -Asserts builds, and of hiding potentially
   unnecessary computations.

llvm-svn: 77019
 2009-07-25 00:23:56 +00:00
Owen Anderson
cc33e89571 Revert the ConstantInt constructors back to their 2.5 forms where possible, thanks to contexts-on-types. More to come. 
llvm-svn: 77011
 2009-07-24 23:12:02 +00:00
Owen Anderson
cc287b28c9 Get rid of the Pass+Context magic. 
llvm-svn: 76702
 2009-07-22 00:24:57 +00:00
Owen Anderson
7f61f8dc30 Rename getConstantInt{True|False} to get{True|False} at Chris' behest. 
llvm-svn: 76598
 2009-07-21 18:03:38 +00:00
Dan Gohman
81885d5b80 Make makeLoopInvariant report whether it made any changes or not, 
and use this to simplify more code.

llvm-svn: 75722
 2009-07-15 01:25:43 +00:00
Dan Gohman
493855541b Update LoopSimplify and LoopUnswitch to use the new makeLoopInvariant 
function.

llvm-svn: 75584
 2009-07-14 01:37:59 +00:00
Owen Anderson
49226b1075 This started as a small change, I swear. Unfortunately, lots of things call the [I|F]CmpInst constructors. Who knew!? 
llvm-svn: 75200
 2009-07-09 23:48:35 +00:00
Owen Anderson
ad3229d281 Thread LLVMContext through the constant folding APIs, which touches a lot of files. 
llvm-svn: 74844
 2009-07-06 18:42:36 +00:00
Owen Anderson
6795819c9e Second batch of passes using LLVMContext. 
llvm-svn: 74753
 2009-07-03 00:54:20 +00:00
Duncan Sands
880eaf5278 Allow readonly functions to unwind exceptions. Teach 
the optimizers about this.  For example, a readonly
function with no uses cannot be removed unless it is
also marked nounwind.

llvm-svn: 71071
 2009-05-06 06:49:50 +00:00
Nick Lewycky
a0dcd7e173 Remove strange extra semicolons. 
llvm-svn: 67287
 2009-03-19 05:51:39 +00:00
Devang Patel
ffd9b999f8 If "optimize for size" attribute is set then block non-trivial loop unswitches but allow trivial loop unswitches. 
llvm-svn: 63670
 2009-02-03 22:04:27 +00:00
Duncan Sands
aee16d4916 Rename getAnalysisToUpdate to getAnalysisIfAvailable. 
llvm-svn: 63198
 2009-01-28 13:14:17 +00:00
Devang Patel
82fb6bc606 Undo previous patch. 
llvm-svn: 60701
 2008-12-08 17:02:37 +00:00
Chris Lattner
f72f8e3b74 switch a couple more calls to use array_pod_sort. 
llvm-svn: 60337
 2008-12-01 06:52:57 +00:00
Devang Patel
c959b4dbd3 Ignore conditions that are outside the loop. 
llvm-svn: 58631
 2008-11-03 19:38:07 +00:00
Daniel Dunbar
5447f9679d Change create*Pass factory functions to return Pass* instead of 
LoopPass*.
 - Although less precise, this means they can be used in clients
   without RTTI (who would otherwise need to include LoopPass.h, which
   eventually includes things using dynamic_cast). This was the
   simplest solution that presented itself, but I am happy to use a
   better one if available.

llvm-svn: 58010
 2008-10-22 23:32:42 +00:00
Dan Gohman
133708df57 Use 0 instead of false to return a null pointer. 
llvm-svn: 57660
 2008-10-17 00:56:52 +00:00
Devang Patel
47a504c87c Implement function notes as function attributes. 
llvm-svn: 56716
 2008-09-26 23:51:19 +00:00
Devang Patel
64dd7a2e89 Large mechanical patch. 
s/ParamAttr/Attribute/g
s/PAList/AttrList/g
s/FnAttributeWithIndex/AttributeWithIndex/g
s/FnAttr/Attribute/g

This sets the stage 
- to implement function notes as function attributes and 
- to distinguish between function attributes and return value attributes.

This requires corresponding changes in llvm-gcc and clang.

llvm-svn: 56622
 2008-09-25 21:00:45 +00:00
Devang Patel
25ecdc49d9 Put FN_NOTE_AlwaysInline and others in FnAttr namespace. 
llvm-svn: 56527
 2008-09-24 00:06:15 +00:00
Devang Patel
b39defd763 Move FN_NOTE_AlwaysInline and other out of ParamAttrs namespace. 
Do not check isDeclaration() in hasNote(). It is clients' responsibility.

llvm-svn: 56524
 2008-09-23 23:52:03 +00:00
Devang Patel
ad8ca34acd Use parameter attribute store (soon to be renamed) for 
Function Notes also. Function notes are stored at index ~0.

llvm-svn: 56511
 2008-09-23 22:35:17 +00:00
Devang Patel
c7fc5ed65f Add hasNote() to check note associated with a function. 
llvm-svn: 56477
 2008-09-22 22:32:29 +00:00
Devang Patel
3d42ac68df A loop may be unswitched multiple times. Reconstruct dom info. at the end. 
llvm-svn: 55806
 2008-09-04 22:43:59 +00:00
Devang Patel
25b88b66e8 Initialize loop data first. 
llvm-svn: 55792
 2008-09-04 20:36:36 +00:00
Devang Patel
c96f319a3c Do not unswitch if the function notes say we're optimizing this function for size. 
llvm-svn: 55786
 2008-09-04 18:55:13 +00:00
Dan Gohman
e1f9be27bc Tidy up several unbeseeming casts from pointer to intptr_t. 
llvm-svn: 55779
 2008-09-04 17:05:41 +00:00
Devang Patel
dcfd567cc5 Do not try to update dominator info while manipulating CFG. This code does not handle all cases and keeps invalid dom info around some cases, which misleads other passes down stream. 
Right now, dom info is recaluclated in the end if the loop is switched.

llvm-svn: 53106
 2008-07-03 17:37:52 +00:00