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45 Commits

Author SHA1 Message Date
Benjamin Kramer
6d85bbc486 Make headers standalone, move a virtual method out of line. 
llvm-svn: 144536
 2011-11-14 17:22:45 +00:00
Chris Lattner
e1fe7061ce land David Blaikie's patch to de-constify Type, with a few tweaks. 
llvm-svn: 135375
 2011-07-18 04:54:35 +00:00
Chris Lattner
04b988a1c0 fix a warning in TinyPtrVector, adopt it in SSAUpdater, saving some 
mallocs.

llvm-svn: 135366
 2011-07-18 01:43:58 +00:00
Devang Patel
214fa1739f Simplify. Consolidate dbg.declare handling in AllocaPromoter. 
llvm-svn: 134538
 2011-07-06 21:09:55 +00:00
Cameron Zwarich
e425894eaf Clean up the lazy initialization of DIBuilder a bit. 
llvm-svn: 131956
 2011-05-24 06:00:08 +00:00
Cameron Zwarich
462b5db500 Make LoadAndStorePromoter preserve debug info and create llvm.dbg.values when 
promoting allocas to SSA variables. Fixes <rdar://problem/9479036>.

llvm-svn: 131953
 2011-05-24 03:10:43 +00:00
Devang Patel
60fb94e8bf Assing line number info to new PHIs created by SSA updater. 
llvm-svn: 130551
 2011-04-29 22:28:59 +00:00
Jay Foad
0d5ca4cf44 Don't include Operator.h from InstrTypes.h. 
llvm-svn: 129271
 2011-04-11 09:35:34 +00:00
Jay Foad
53632b7c03 Remove PHINode::reserveOperandSpace(). Instead, add a parameter to 
PHINode::Create() giving the (known or expected) number of operands.

llvm-svn: 128537
 2011-03-30 11:28:46 +00:00
Chris Lattner
f33b65080c fix PR9017, a bug where we'd assert when promoting in unreachable 
code.

llvm-svn: 124100
 2011-01-24 03:29:07 +00:00
Chris Lattner
e6d5b3c4ce Generalize LoadAndStorePromoter a bit and switch LICM 
to use it.

llvm-svn: 123501
 2011-01-15 00:12:35 +00:00
Chris Lattner
2cf8e75d34 Add a new LoadAndStorePromoter class, which implements the general 
"promote a bunch of load and stores" logic, allowing the code to
be shared and reused.

llvm-svn: 123456
 2011-01-14 19:36:13 +00:00
Duncan Sands
74aeda71dd Have a few places that want to simplify phi nodes use SimplifyInstruction 
rather than calling hasConstantValue.  No intended functionality change.

llvm-svn: 119352
 2010-11-16 17:41:24 +00:00
Duncan Sands
a95548a8d2 Reapply commit 112699, speculatively reverted by echristo, since 
I'm sure it is harmless.  Original commit message:
If PrototypeValue is erased in the middle of using the SSAUpdator
then the SSAUpdator may access freed memory.  Instead, simply pass
in the type and name explicitly, which is all that was used anyway.

llvm-svn: 112810
 2010-09-02 08:14:03 +00:00
Eric Christopher
f72b7040a2 Speculatively revert 112699 and 112702, they seem to be causing 
self host errors on clang-x86-64.

llvm-svn: 112719
 2010-09-01 17:29:10 +00:00
Duncan Sands
f7e2f45e1a If PrototypeValue is erased in the middle of using the SSAUpdator 
then the SSAUpdator may access freed memory.  Instead, simply pass
in the type and name explicitly, which is all that was used anyway.

llvm-svn: 112699
 2010-09-01 10:29:33 +00:00
Chris Lattner
fac07b1dca implement SSAUpdater::RewriteUseAfterInsertions, a helpful form of RewriteUse. 
llvm-svn: 112409
 2010-08-29 04:54:06 +00:00
Bob Wilson
e81252b747 Combine the implementations of the core part of the SSAUpdater and 
MachineSSAUpdater to avoid duplicating all the code.

llvm-svn: 103060
 2010-05-04 23:18:19 +00:00
Bob Wilson
7716410af6 Fix a performance problem with the new SSAUpdater. This showed up in the 
GCCAS time for MultiSource/Benchmarks/ASCI_Purple/SMG2000.

llvm-svn: 102009
 2010-04-21 18:39:03 +00:00
Bob Wilson
ad00f21093 Re-commit my previous SSAUpdater changes. The previous version naively tried 
to determine where to place PHIs by iteratively comparing reaching definitions
at each block.  That was just plain wrong.  This version now computes the
dominator tree within the subset of the CFG where PHIs may need to be placed,
and then places the PHIs in the iterated dominance frontier of each definition.
The rest of the patch is mostly the same, with a few more performance
improvements added in.

llvm-svn: 101612
 2010-04-17 03:08:24 +00:00
Bob Wilson
5a3200f750 Revert all my SSAUpdater patches. The PHI placement algorithm is not correct 
(what was I thinking?) and there's also a problem with LCSSA.  I'll try again
later with fixes.

--- Reverse-merging r100263 into '.':
U    lib/Transforms/Utils/SSAUpdater.cpp
--- Reverse-merging r100177 into '.':
G    lib/Transforms/Utils/SSAUpdater.cpp
--- Reverse-merging r100148 into '.':
G    lib/Transforms/Utils/SSAUpdater.cpp
--- Reverse-merging r100147 into '.':
U    include/llvm/Transforms/Utils/SSAUpdater.h
G    lib/Transforms/Utils/SSAUpdater.cpp
--- Reverse-merging r100131 into '.':
G    include/llvm/Transforms/Utils/SSAUpdater.h
G    lib/Transforms/Utils/SSAUpdater.cpp
--- Reverse-merging r100130 into '.':
G    lib/Transforms/Utils/SSAUpdater.cpp
--- Reverse-merging r100126 into '.':
G    include/llvm/Transforms/Utils/SSAUpdater.h
G    lib/Transforms/Utils/SSAUpdater.cpp
--- Reverse-merging r100050 into '.':
D    test/Transforms/GVN/2010-03-31-RedundantPHIs.ll
--- Reverse-merging r100047 into '.':
G    include/llvm/Transforms/Utils/SSAUpdater.h
G    lib/Transforms/Utils/SSAUpdater.cpp

llvm-svn: 100264
 2010-04-03 03:50:38 +00:00
Bob Wilson
71b0b33e05 Add a DEBUG_TYPE for the SSAUpdater. 
llvm-svn: 100263
 2010-04-03 03:28:44 +00:00
Bob Wilson
88d149d129 Recommit 100158 now that the buildbots are happy again. 
llvm-svn: 100177
 2010-04-02 05:09:46 +00:00
Bob Wilson
4b5f895975 Revert 100158 in case it is causing some of the buildbot problems. 
llvm-svn: 100164
 2010-04-02 01:22:49 +00:00
Bob Wilson
ab18888a5a Check for terminating conditions before adding PHIs to the worklists. 
This is more efficient than adding them to the worklist and then ignoring them.

llvm-svn: 100158
 2010-04-02 00:10:41 +00:00
Bob Wilson
1b646b39e2 Remove trailing whitespace. 
llvm-svn: 100148
 2010-04-01 23:06:38 +00:00
Bob Wilson
08cc4030dd Rewrite another SSAUpdater function to avoid recursion. 
llvm-svn: 100147
 2010-04-01 23:05:58 +00:00
Bob Wilson
bfd85d79c1 Change another SSAUpdater function to avoid recursion. 
llvm-svn: 100131
 2010-04-01 20:04:30 +00:00
Bob Wilson
39e3a8e9f7 Simplify the code to check for existing PHIs, now that it is only used in 
one place.  This removes the template function added in svn 94690.

llvm-svn: 100130
 2010-04-01 19:53:48 +00:00
Bob Wilson
205385244c The SSAUpdater should avoid recursive traversals of the CFG, since that may 
blow out the stack for really big functions.  Start by fixing an easy case.

llvm-svn: 100126
 2010-04-01 18:46:59 +00:00
Bob Wilson
2a872616de Rewrite part of the SSAUpdater to be more careful about inserting redundant 
PHIs.  The previous algorithm was unable to reliably detect when existing
PHIs in a cycle can be reused.  I'm still working on reducing a testcase.
Radar 7711900.

llvm-svn: 100047
 2010-03-31 20:51:00 +00:00
Bob Wilson
2e1a609654 Avoid creating redundant PHIs in SSAUpdater::GetValueInMiddleOfBlock. 
This was already being done in SSAUpdater::GetValueAtEndOfBlock so I've
just changed SSAUpdater to check for existing PHIs in both places.

llvm-svn: 94690
 2010-01-27 22:01:02 +00:00
David Greene
991e882855 Change errs() to dbgs(). 
llvm-svn: 92603
 2010-01-05 01:26:49 +00:00
Chris Lattner
1cbad45619 improve indentation avoid a pointless conversion from weakvh to trackingvh, 
no functionality change.

llvm-svn: 91848
 2009-12-21 22:43:03 +00:00
Chris Lattner
c54fd1e777 fix PR5837 by having SSAUpdate reuse phi nodes for the 
'GetValueInMiddleOfBlock' case, instead of inserting 
duplicates.

A similar fix is almost certainly needed by the machine-level
SSAUpdate implementation.

llvm-svn: 91820
 2009-12-21 07:16:11 +00:00
Chris Lattner
422a3ff7d5 add an assert to make it really clear what this is doing. Return singularval as 
a compile time perf optimization to avoid a load.

llvm-svn: 90507
 2009-12-04 01:03:32 +00:00
Chris Lattner
803539f022 alternate fix for PR5258 which avoids worklist problems, with reduced testcase. 
llvm-svn: 84667
 2009-10-20 20:27:49 +00:00
Torok Edwin
bdcd45a9d6 Fix PR5258, jump-threading creating invalid PHIs. 
When an incoming value for a PHI is updated, we must also updated all other
incoming values for the same BB to match, otherwise we create invalid PHIs.

llvm-svn: 84638
 2009-10-20 15:42:00 +00:00
Duncan Sands
4cde5474aa Strip trailing white space. 
llvm-svn: 84256
 2009-10-16 15:20:13 +00:00
Chris Lattner
0aa320ae4d add a simple helper method. 
llvm-svn: 83745
 2009-10-10 23:41:48 +00:00
Chris Lattner
acf73d9839 add ability for clients of SSAUpdater to find out about the 
PHI nodes inserted.

llvm-svn: 83744
 2009-10-10 23:15:24 +00:00
Chris Lattner
db4d523cca add the ability to get a rewritten value from the middle of a block, 
not just at the end.  Add a big comment explaining when this could
be useful (which never happens for jump threading).

llvm-svn: 83741
 2009-10-10 23:00:11 +00:00
Chris Lattner
9899ce267c rename GetValueInBlock -> GetValueAtEndOfBlock to better reflect 
what it does.

llvm-svn: 83740
 2009-10-10 22:41:58 +00:00
Chris Lattner
0561804097 use a typedef instead of spelling out an insane type. Yay for auto someday. 
llvm-svn: 83707
 2009-10-10 09:09:20 +00:00
Chris Lattner
9c5aa00411 Implement an efficient and fully general SSA update mechanism that 
works on unstructured CFGs.  This implements PR217, our oldest open PR.

llvm-svn: 83705
 2009-10-10 09:04:27 +00:00