Chris Lattner
0efef015fa
Fix a bug that was preventing povray and namd from pool allocating correctly.
...
llvm-svn: 17632
2004-11-08 21:08:46 +00:00
Chris Lattner
dcee21898f
Handle assert_fail special
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llvm-svn: 17631
2004-11-08 21:08:28 +00:00
Chris Lattner
9f23af6d68
Remove dead var
...
llvm-svn: 17485
2004-11-05 04:52:08 +00:00
Chris Lattner
3b6d1045d3
Don't call Constant::getNullValue when the argument could be VoidTy
...
llvm-svn: 17457
2004-11-03 18:51:26 +00:00
Chris Lattner
8572d582cf
Fix comment
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llvm-svn: 17377
2004-10-31 21:54:51 +00:00
Chris Lattner
d72b6b1e77
Improve comment
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llvm-svn: 17375
2004-10-31 19:57:43 +00:00
Chris Lattner
14d85c9b09
Add more paranoid assertions :)
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llvm-svn: 17367
2004-10-31 17:45:40 +00:00
Chris Lattner
29b6259de3
Fix some more problems where we called getOffset before getNode()
...
llvm-svn: 17358
2004-10-30 07:21:19 +00:00
Chris Lattner
4b741eab69
Fix three bugs:
...
1. Calls to external global VARIABLES should not be treated as a call to an
external function
2. Efficiently deleting an element from a vector by using std::swap with
the back, then pop_back is NOT a good way to keep the vector sorted.
3. Our hope of having stuff get deleted by making them redundant just won't
work. In particular, if we have three calls in sequence that should be
merged: A, B, C first we unify B into A. To be sure that they appeared
identical (so B would be erased) we set B = A. On the next step, we
unified C into A and set C = A. Unfortunately, this is no guarantee that
C = B, so we would fail to delete the dead call. Switch to a more
explicit scheme.
llvm-svn: 17357
2004-10-30 05:41:23 +00:00
Chris Lattner
14dfc01ad5
Fix more undefined behavior
...
llvm-svn: 17356
2004-10-30 04:22:45 +00:00
Chris Lattner
c17cd85776
* Add a method
...
* change some uses of NH.getNode() in a bool context to use !NH.isNull()
* Fix a bunch of places where we depended on the (undefined) order of
evaluation of arguments to function calls to ensure that getNode() was
called before getOffset(). In practice, this was NOT happening.
llvm-svn: 17354
2004-10-30 04:05:01 +00:00
Alkis Evlogimenos
1162280a0d
Fix library name.
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llvm-svn: 17306
2004-10-28 05:36:48 +00:00
Reid Spencer
d3f7233495
Change Library Names Not To Conflict With Others When Installed
...
llvm-svn: 17286
2004-10-27 23:18:45 +00:00
Chris Lattner
dd0094e4ed
Convert 'struct' to 'class' in various places to adhere to the coding standards
...
and work better with VC++. Patch contributed by Morten Ofstad!
llvm-svn: 17281
2004-10-27 16:14:51 +00:00
Chris Lattner
3a79669263
add support for UndefValue
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llvm-svn: 17260
2004-10-26 16:23:03 +00:00
Chris Lattner
1cef20bac1
Patch to support MSVC, contributed by Morten Ofstad
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llvm-svn: 17214
2004-10-25 18:40:08 +00:00
Reid Spencer
e48ba34fd4
We won't use automake
...
llvm-svn: 17155
2004-10-22 03:35:04 +00:00
Reid Spencer
ce514b1c2c
Initial automake generated Makefile template
...
llvm-svn: 17136
2004-10-18 23:55:41 +00:00
Chris Lattner
2fae8a1ef9
Add support for unreachable
...
llvm-svn: 17056
2004-10-16 18:21:33 +00:00
Chris Lattner
8d479b62ad
Add support for undef
...
llvm-svn: 17055
2004-10-16 18:19:26 +00:00
Chris Lattner
cbdf19fed2
Add support
...
llvm-svn: 17052
2004-10-16 18:16:19 +00:00
Chris Lattner
b3a86dc93f
Be more careful about looking for constants when we really want constantint's.
...
llvm-svn: 17029
2004-10-16 16:07:10 +00:00
Chris Lattner
3fc5e3778f
Do not use the same variable name for two different variables in the
...
same scope. This confused VC++ (and probably people too!). Patch by
Morten Ofstad!
llvm-svn: 16985
2004-10-14 14:59:16 +00:00
Reid Spencer
e6418ec30f
Update to reflect changes in Makefile rules.
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llvm-svn: 16950
2004-10-13 11:46:52 +00:00
Chris Lattner
6b6e5a5815
This nutty patch has been in my tree since before 1.3 went out, and it needs
...
to go in. This patch allows us to compute the trip count of loops controlled
by values loaded from constant arrays. The cannonnical example of this is
strlen when passed a constant argument:
for (int i = 0; "constantstring"[i]; ++i) ;
return i;
In this case, it will compute that the loop executes 14 times, which means
that the exit value of i is 14. Because of this, the loop gets DCE'd and
we are happy. This also applies to anything that does similar things, e.g.
loops like this:
const float Array[] = { 0.1, 2.1, 3.2, 23.21 };
for (int i = 0; Array[i] < 20; ++i)
and is actually fairly general.
The problem with this is that it almost never triggers. The reason is that
we run indvars and the loop optimizer only at compile time, which is before
things like strlen and strcpy have been inlined into the program from libc.
Because of this, it almost never is used (it triggers twice in specint2k).
I'm committing it because it DOES work, may be useful in the future, and
doesn't slow us down at all. If/when we start running the loop optimizer
at link-time (-O4?) this will be very nice indeed :)
llvm-svn: 16926
2004-10-12 01:49:27 +00:00
Chris Lattner
f8dab00902
Fix SingleSource/Benchmarks/McGill/chomp
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llvm-svn: 16912
2004-10-11 04:07:27 +00:00
Reid Spencer
bc135b067a
Build both archive and relinked objects
...
llvm-svn: 16892
2004-10-10 22:17:39 +00:00
Reid Spencer
7d9cba7a0f
Initial version of automake Makefile.am file.
...
llvm-svn: 16885
2004-10-10 20:43:57 +00:00
Chris Lattner
d15e144241
Fix a nasty dangling pointer problem, due to a free'd pointer being left in
...
a map. This caused problems if a later object happened to be allocated at
the free'd object's address.
llvm-svn: 16813
2004-10-07 20:01:31 +00:00
Chris Lattner
e412d10cc0
Dont' let null nodes sneak past cast instructions
...
llvm-svn: 16779
2004-10-06 19:29:13 +00:00
Chris Lattner
43c0372c0b
'Pass' should now not be derived from by clients. Instead, they should derive
...
from ModulePass. Instead of implementing Pass::run, then should implement
ModulePass::runOnModule.
llvm-svn: 16436
2004-09-20 04:48:05 +00:00
Chris Lattner
01bbefa96c
Finegrainify namespacification
...
'Pass' should now not be derived from by clients. Instead, they should derive
from ModulePass. Instead of implementing Pass::run, then should implement
ModulePass::runOnModule.
llvm-svn: 16434
2004-09-20 04:44:31 +00:00
Chris Lattner
e6755fe307
Fix a nasty iterator invalidation problem I introduced yesterday. This
...
unfortunately is the cause of a bunch of failures from tonight, and the
reason the tester is running so slow :(
llvm-svn: 16407
2004-09-19 19:01:06 +00:00
Chris Lattner
110bbafcf7
Add CallGraphNode::removeAnyCallEdgeTo method
...
llvm-svn: 16398
2004-09-18 21:34:34 +00:00
Chris Lattner
53dea1ce37
When changing a function, make sure to update the CallGraphNode for the
...
function, not just the CallGraph.
llvm-svn: 16388
2004-09-18 00:27:20 +00:00
Chris Lattner
a9b80a3258
Implement new changeFunction method, nuke a never implemented one.
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llvm-svn: 16386
2004-09-18 00:22:13 +00:00
Reid Spencer
c6a8d70cff
Convert code to compile with vc7.1.
...
Patch contributed by Paolo Invernizzi. Thanks Paolo!
llvm-svn: 16368
2004-09-15 17:06:42 +00:00
Chris Lattner
f1a0bf88c5
Add some assertions
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llvm-svn: 16366
2004-09-15 16:59:47 +00:00
Chris Lattner
606caa617e
Implement an AliasSetTracker::copyValue method
...
llvm-svn: 16344
2004-09-14 19:15:32 +00:00
Alkis Evlogimenos
0c50e0f211
Fixes to make LLVM compile with vc7.1.
...
Patch contributed by Paolo Invernizzi!
llvm-svn: 16152
2004-09-03 18:19:51 +00:00
Reid Spencer
c4abcbefb1
Changes For Bug 352
...
Move include/Config and include/Support into include/llvm/Config,
include/llvm/ADT and include/llvm/Support. From here on out, all LLVM
public header files must be under include/llvm/.
llvm-svn: 16137
2004-09-01 22:55:40 +00:00
Chris Lattner
818ac2d5e2
Fix a bug that caused the pass to go into infinite loops on trivial testcases.
...
This is fallout of the Bug 122 changes.
llvm-svn: 15811
2004-08-16 05:38:02 +00:00
Chris Lattner
0b9b58e550
Add standard print/dump methods to CallGraph classes.
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llvm-svn: 15569
2004-08-08 03:27:49 +00:00
Chris Lattner
13e1bc338d
Hide this option
...
llvm-svn: 15415
2004-08-02 20:16:21 +00:00
Misha Brukman
58104df77b
Fix #includes of i*.h => Instructions.h as per PR403.
...
llvm-svn: 15334
2004-07-29 17:30:56 +00:00
Misha Brukman
2a80e53645
Fix #includes of i*.h => Instructions.h as per PR403.
...
llvm-svn: 15328
2004-07-29 17:05:13 +00:00
Alkis Evlogimenos
fb27f702ca
Merge i*.h headers into Instructions.h as part of bug403.
...
llvm-svn: 15325
2004-07-29 12:17:34 +00:00
Chris Lattner
b2cf39d1a4
Fix test/Regression/Analysis/BasicAA/2004-07-28-MustAliasbug.llx
...
This also fixes the miscompilation of MallocBench/gs with dead store
elimination enabled.
llvm-svn: 15324
2004-07-29 07:56:39 +00:00
Brian Gaeke
45adb41f46
Make the create...() functions for some of these passes return a FunctionPass *.
...
llvm-svn: 15276
2004-07-27 17:43:21 +00:00
Chris Lattner
81f96c5a79
nuke pointless -debug output
...
llvm-svn: 15267
2004-07-27 08:03:18 +00:00
Chris Lattner
6a1dd59421
Fix conservative assumption, which was quite broken. Also, notice that
...
functions known to not access memory (like sin/cos) don't access memory! :)
llvm-svn: 15264
2004-07-27 07:46:26 +00:00
Chris Lattner
e921652646
Remove a bogus assertion
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llvm-svn: 15261
2004-07-27 07:22:21 +00:00
Chris Lattner
c76d21f55d
Complete rewrite of this pass to be faster, use less memory, be easier to
...
understand, and more accurate to boot! This implements
GlobalModRef/purecse.ll over the previous impl.
llvm-svn: 15260
2004-07-27 06:40:37 +00:00
Chris Lattner
550242f7ec
Use context-sensitive alias analysis to avoid pessimization in clients of
...
AliasSetTracker (dse and licm). This implements
DeadStoreElimination/context-sensitive.llx
llvm-svn: 15254
2004-07-27 02:20:26 +00:00
Chris Lattner
40bd881142
Make basicaa a bit more aggressive
...
llvm-svn: 15252
2004-07-27 02:18:52 +00:00
Chris Lattner
fe3fff9354
basic-aa can actually provide simple mod/ref info
...
llvm-svn: 15251
2004-07-27 02:13:55 +00:00
Chris Lattner
9cfa22fb48
This was implemented back in march
...
llvm-svn: 15250
2004-07-27 01:59:42 +00:00
Chris Lattner
8b2590f09f
Add some new methods
...
llvm-svn: 15230
2004-07-26 05:50:23 +00:00
Chris Lattner
447e112745
Fix a latent bug in the AliasSetTracker that was exposed by the FreeInst additions and broke a bunch of programs last night.
...
llvm-svn: 15214
2004-07-25 18:32:01 +00:00
Chris Lattner
31d9cbf7bb
Add support for free instructions
...
llvm-svn: 15197
2004-07-25 07:57:37 +00:00
Chris Lattner
e3adc34ea7
Clean up reference counting to stop "leaking" alias sets
...
llvm-svn: 15099
2004-07-22 07:58:18 +00:00
Brian Gaeke
f18cdca667
These files don't need to include <iostream> since they include "Support/Debug.h".
...
llvm-svn: 15089
2004-07-21 20:50:33 +00:00
Chris Lattner
195950df76
Add capability to remove aliasing aliassets from an AST
...
llvm-svn: 15066
2004-07-21 07:04:26 +00:00
Chris Lattner
f9976c5dbf
Make the AST interface a bit richer by returning whether an insertion caused
...
an insertion or not (because the pointer set already existed).
llvm-svn: 15064
2004-07-21 05:18:04 +00:00
Chris Lattner
36940c22f7
Do not ignore casts unless they are pointer-pointer casts. This caused us
...
to miscompile the SingleSource/Regression/C++/pointer_member.cpp program.
llvm-svn: 15062
2004-07-21 03:56:54 +00:00
Reid Spencer
b339652b44
bug 122:
...
- Replace ConstantPointerRef usage with GlobalValue usage
- Minimize redundant isa<GlobalValue> usage
- Correct isa<Constant> for GlobalValue subclass
llvm-svn: 14942
2004-07-18 00:18:30 +00:00
Chris Lattner
74807fe1a3
Fix incorrect computation of mod/ref sets. Do not ask for mod/ref information
...
for objects of size 0.
llvm-svn: 14908
2004-07-17 07:40:34 +00:00
Chris Lattner
2b68acbfe0
Print modref information in a useful way.
...
llvm-svn: 14907
2004-07-17 06:43:20 +00:00
Chris Lattner
49fd294675
Cleanups: fold two loops into one
...
New features: -print-all-alias-modref-info option, print more info
llvm-svn: 14906
2004-07-17 06:28:49 +00:00
Chris Lattner
763d51409f
Be compatible with IA64
...
llvm-svn: 14864
2004-07-16 00:04:13 +00:00
Chris Lattner
bb7fe18493
Fixes for PR341
...
llvm-svn: 14843
2004-07-15 02:31:46 +00:00
Chris Lattner
d7d7bc70fd
Fix for PR341
...
llvm-svn: 14842
2004-07-15 02:26:49 +00:00
Chris Lattner
fb6e1c2007
Simplify logic.
...
llvm-svn: 14825
2004-07-14 20:27:12 +00:00
Chris Lattner
203cdb2e64
Disable some code that isn't helping matters
...
llvm-svn: 14682
2004-07-08 07:25:51 +00:00
Chris Lattner
dce7977318
Headers moved
...
llvm-svn: 14665
2004-07-07 06:35:22 +00:00
Chris Lattner
7e0d8f8084
Move all of the DSA headers into the Analysis/DataStructure subdir.
...
llvm-svn: 14663
2004-07-07 06:32:21 +00:00
Chris Lattner
fb2f56c7c8
As much as I hate to say it, the whole setNode interface for DSNodeHandles
...
is HOPELESSLY broken. The problem is that the embedded getNode call can
change the offset of the node handle in unpredictable ways.
As it turns out, all of the clients of this method really want to set
both the node and the offset, thus it is more efficient (and less buggy)
to just do both of them in one method call. This fixes some obscure bugs
handling non-forwarded node handles.
llvm-svn: 14660
2004-07-07 06:12:52 +00:00
Reid Spencer
50ec3f9325
Add #include <iostream> since Value.h does not #include it any more.
...
llvm-svn: 14622
2004-07-04 12:19:56 +00:00
Chris Lattner
7d6a9bf05c
Initial checkin of a simple mod/ref analysis for global variables. This is
...
still overly conservative and uses very simple data structures, but it is a
start, and allows elimination of a lot of loads.
llvm-svn: 14462
2004-06-28 06:33:13 +00:00
Chris Lattner
548171248d
Moved IPModRef out of the public include dir
...
llvm-svn: 14455
2004-06-28 00:41:23 +00:00
Chris Lattner
6eb1e76227
Move DependenceGraph.* to lib/Analysis/DataStructure
...
llvm-svn: 14452
2004-06-28 00:32:33 +00:00
Chris Lattner
a77dd6edec
Moving to lib/Analysis/DataStructure
...
llvm-svn: 14450
2004-06-28 00:29:42 +00:00
Chris Lattner
f914ccfa2a
Move MemoryDepAnalysis.h into lib/Analysis/DataStructure
...
llvm-svn: 14448
2004-06-28 00:27:16 +00:00
Chris Lattner
244d5fba00
Move PgmDependenceGraph.h out of the public include hierarchy
...
llvm-svn: 14446
2004-06-28 00:20:04 +00:00
Chris Lattner
850f1967b6
Simplify code
...
llvm-svn: 14424
2004-06-26 19:31:26 +00:00
Chris Lattner
d6e23a5104
Fix header
...
llvm-svn: 14394
2004-06-25 04:24:22 +00:00
Chris Lattner
228e6d64d0
Remove distasteful method which is really part of the indvars pass
...
llvm-svn: 14359
2004-06-24 06:52:20 +00:00
Chris Lattner
4e431080a9
Fix merging of nodes whose incoming offset is not zero. This unbreaks DSA on
...
several mallocbench programs, including perl.
llvm-svn: 14342
2004-06-23 06:29:59 +00:00
Misha Brukman
699226cbe4
File requires IPA, moved to lib/Analysis/IPA
...
llvm-svn: 14330
2004-06-22 19:04:53 +00:00
Misha Brukman
f940c277df
File depends on MemoryDepAnalysis (DSA); moved to lib/Analysis/DataStructure
...
llvm-svn: 14327
2004-06-22 18:28:37 +00:00
Misha Brukman
170b8a80de
Files depend on DSA, moved to lib/Analysis/DataStructure
...
llvm-svn: 14326
2004-06-22 18:13:24 +00:00
Misha Brukman
43f0a951fe
File depends on DSA, moved to lib/Analysis/DataStructure
...
llvm-svn: 14325
2004-06-22 18:11:38 +00:00
Chris Lattner
26e594052e
If an edge points to a field of another memory object, actually reflect this
...
in the DOT visualization of the DSGraphs.
llvm-svn: 14316
2004-06-22 07:13:10 +00:00
Chris Lattner
fea46da8de
REALLY fix PR378: crash in scalar evolution analysis
...
llvm-svn: 14275
2004-06-20 20:32:16 +00:00
Chris Lattner
59d13ac701
Fix a bug in my change last night that caused a few test failures.
...
llvm-svn: 14270
2004-06-20 17:01:44 +00:00
Chris Lattner
8c90177e5f
Do not sort SCEV objects by address: instead sort by complexity and group
...
by address. This prevents the resultant SCEV objects from depending on
where in memory other scev objects happen to live.
llvm-svn: 14263
2004-06-20 06:23:15 +00:00
Chris Lattner
9b19f34fe2
Fix a tiny bug in the -no-aa pass, in which it did not ever get a target data.
...
This is a regression from 1.2, though noone uses -no-aa anyway
llvm-svn: 14245
2004-06-19 08:05:58 +00:00
Chris Lattner
0cd29ae2cd
Rename Type::PrimitiveID to TypeId and ::getPrimitiveID() to ::getTypeID()
...
llvm-svn: 14201
2004-06-17 18:19:28 +00:00
Chris Lattner
7c3600a50e
isnan is dead
...
llvm-svn: 14191
2004-06-15 21:52:58 +00:00
Chris Lattner
8dd2380de4
llvm.isnan doesn't access memory
...
llvm-svn: 14151
2004-06-11 06:17:13 +00:00
Chris Lattner
9579beadfe
Don't grab the condition of unconditional branches!
...
This fixes PR363
llvm-svn: 14076
2004-06-08 21:50:30 +00:00
Chris Lattner
1515fd1851
Add some notes so I can throw away one of my many todo lists.
...
llvm-svn: 14046
2004-06-05 20:12:36 +00:00
Chris Lattner
2afbad063f
Don't send random junk to CachedWriter's. Also remove a cast that could be
...
problematic when Type does not derive from Value.
llvm-svn: 14022
2004-06-04 20:25:55 +00:00
Chris Lattner
37c8081a07
Minor efficiency gain: do 1 nlogn lookup instead of two
...
Code cleanup
llvm-svn: 13875
2004-05-28 05:36:49 +00:00
Chris Lattner
91633c1b92
Fix warnings about reaching end of non-void function
...
llvm-svn: 13852
2004-05-27 20:57:01 +00:00
Vikram S. Adve
6026f572eb
Recognize memalign and friends, and handle them specially.
...
llvm-svn: 13741
2004-05-25 08:14:52 +00:00
Chris Lattner
dd4c06d2bf
Changes to work with the changes to the AliasAnalysis interface. The -no-aa
...
class is now in the BasicAliasAnalysis.cpp file
llvm-svn: 13684
2004-05-23 21:15:48 +00:00
Chris Lattner
7ccc4c2ed9
Move the -no-aa AA implementation into this file since both of these
...
alias analysis implementations are special: they do not autoforward to a
chained implementation of alias analysis
llvm-svn: 13683
2004-05-23 21:15:12 +00:00
Chris Lattner
1336a3f17a
Updates to work with the new auto-forwarding AA interface changes
...
llvm-svn: 13682
2004-05-23 21:14:27 +00:00
Chris Lattner
0e1a543d88
Fix a really nasty bug with the -disable-ds-field-sensitivity option
...
llvm-svn: 13681
2004-05-23 21:14:09 +00:00
Chris Lattner
89353483d6
Update to match the autochaining interface that the AA interface uses
...
llvm-svn: 13680
2004-05-23 21:13:51 +00:00
Chris Lattner
6c71895a16
Implement the interfaces to update value numbering information. Add an
...
assert.
llvm-svn: 13679
2004-05-23 21:13:24 +00:00
Chris Lattner
0588bd19d2
Rename a method
...
llvm-svn: 13676
2004-05-23 21:10:58 +00:00
Chris Lattner
fa5d566d95
Add a simple implementation of Andersen's interprocedural pointer analysis
...
llvm-svn: 13666
2004-05-23 21:00:47 +00:00
Vikram S. Adve
cf685da276
Inline both direct and indirect callees in the CBU phase because
...
a direct callee may have indirect callees and so may have changed.
llvm-svn: 13649
2004-05-23 08:00:34 +00:00
Chris Lattner
7c723ecb57
Fine grainify namespacification
...
llvm-svn: 13436
2004-05-09 06:22:29 +00:00
Brian Gaeke
dfe0d9af07
Move the stuff that fixes the size, orientation & fonts of graphs to
...
the debugging functions that call "dot". These fixed settings have
various problems: for example, the fixed size that is set in the graph
traits classes is not appropriate for turning the dot file into a PNG,
and if TrueType font rendering is being used, the 'Courier' TrueType font
may not be installed. It seems easy enough to specify these things on the
command line, anyhow.
llvm-svn: 13366
2004-05-05 06:10:06 +00:00
Brian Gaeke
f3b62c562e
Add stub support for reading BBTraces.
...
llvm-svn: 13352
2004-05-04 17:11:14 +00:00
Brian Gaeke
ae8607e56a
Share ProfilingType enum with the C profiling runtime libraries.
...
llvm-svn: 13346
2004-05-04 16:53:07 +00:00
Chris Lattner
f5f6f8c0de
Fix a problem with double freeing memory. For some reason, CallGraph is not
...
acting like a normal pass. :(
llvm-svn: 13318
2004-05-02 16:06:18 +00:00
Chris Lattner
099edda1b1
Plug a minor memory leak
...
llvm-svn: 13317
2004-05-02 07:31:34 +00:00
Misha Brukman
f5e334783a
Wrapped code and comments at 80 cols; doxygenified some comments.
...
llvm-svn: 13264
2004-04-29 04:05:30 +00:00
Misha Brukman
9c4c92c40c
Reorder #includes as per style guide.
...
llvm-svn: 13263
2004-04-29 04:04:47 +00:00
Misha Brukman
f8b734296e
Send text and numbers directly to CachedWriter's contained ostream.
...
llvm-svn: 13243
2004-04-28 18:52:43 +00:00
Chris Lattner
02c65b5395
Changes to fix up the inst_iterator to pass to boost iterator checks. This
...
patch was graciously contributed by Vladimir Prus.
llvm-svn: 13185
2004-04-27 15:13:33 +00:00
Brian Gaeke
217515996f
Add functions that return instances of these printer passes
...
llvm-svn: 13175
2004-04-26 16:27:08 +00:00
Chris Lattner
430a61e786
If an object is not in the scalar map then it must be a global from another
...
graph.
llvm-svn: 13173
2004-04-26 14:44:08 +00:00
Chris Lattner
f4eb9eb0f2
Eliminate all of the SCEV Expansion code which is really part of the
...
IndVars pass, not part of SCEV *analysis*.
llvm-svn: 13134
2004-04-23 21:29:03 +00:00
Chris Lattner
e340657a23
Pass the callgraph not the module
...
llvm-svn: 13087
2004-04-20 21:52:26 +00:00
Chris Lattner
c3714a870c
Add the ability for SCC passes to initialize and finalize themselves
...
llvm-svn: 13084
2004-04-20 21:30:06 +00:00
Chris Lattner
710a51d72b
It's not just a printer, it's actually an analysis too
...
llvm-svn: 13064
2004-04-19 03:42:32 +00:00
Chris Lattner
69d4611250
Remove code to update loop depths
...
llvm-svn: 13058
2004-04-19 03:02:09 +00:00
Chris Lattner
509116ec78
Add new method
...
llvm-svn: 13050
2004-04-18 22:45:27 +00:00
Chris Lattner
06e17bb6f7
Fix computation of exit blocks
...
llvm-svn: 13047
2004-04-18 22:21:41 +00:00
Chris Lattner
7174acca00
Change the ExitBlocks list from being explicitly contained in the Loop
...
structure to being dynamically computed on demand. This makes updating
loop information MUCH easier.
llvm-svn: 13045
2004-04-18 22:14:10 +00:00
Chris Lattner
08232425a0
Implement method
...
llvm-svn: 13036
2004-04-18 06:54:48 +00:00
Chris Lattner
6606b526f6
Add a new method, add a check missing that caused a segfault if a loop didn't
...
have a canonical indvar
llvm-svn: 13032
2004-04-18 05:38:05 +00:00
Chris Lattner
b5ee2bcb62
Add the ability to compute exit values for complex loop using unanalyzable
...
operations. This allows us to compile this testcase:
int main() {
int h = 1;
do h = 3 * h + 1; while (h <= 256);
printf("%d\n", h);
return 0;
}
into this:
int %main() {
entry:
call void %__main( )
%tmp.6 = call int (sbyte*, ...)* %printf( sbyte* getelementptr ([4 x sbyte]* %.str_1, long 0, long 0), int 364 ) ; <int> [#uses=0]
ret int 0
}
This testcase was taken directly from 256.bzip2, believe it or not.
This code is not as general as I would like. Next up is to refactor it
a bit to handle more cases.
llvm-svn: 13019
2004-04-17 22:58:41 +00:00
Chris Lattner
9a73de2ba2
Add the ability to compute trip counts that are only controlled by constants
...
even if the loop is using expressions that we can't compute as a closed-form.
This allows us to calculate that this function always returns 55:
int test() {
double X;
int Count = 0;
for (X = 100; X > 1; X = sqrt(X), ++Count)
/*empty*/;
return Count;
}
And allows us to compute trip counts for loops like:
int h = 1;
do h = 3 * h + 1; while (h <= 256);
(which occurs in bzip2), and for this function, which occurs after inlining
and other optimizations:
int popcount()
{
int x = 666;
int result = 0;
while (x != 0) {
result = result + (x & 0x1);
x = x >> 1;
}
return result;
}
We still cannot compute the exit values of result or h in the two loops above,
which means we cannot delete the loop, but we are getting closer. Being able to
compute a constant trip count for these two loops will allow us to unroll them
completely though.
llvm-svn: 13017
2004-04-17 18:36:24 +00:00
Brian Gaeke
4b9f67c638
Include <cmath> for compatibility with gcc 3.0.x (the system compiler on
...
Debian.)
llvm-svn: 12986
2004-04-16 15:57:32 +00:00
Chris Lattner
a86cf626b5
add some helpful methods. Rearrange #includes to proper order
...
llvm-svn: 12960
2004-04-15 15:16:02 +00:00
Chris Lattner
e0156bd979
Factor a bunch of classes out into a public header
...
llvm-svn: 12958
2004-04-15 15:07:24 +00:00
Chris Lattner
ff600e280d
Unbreak the build
...
llvm-svn: 12956
2004-04-15 14:17:43 +00:00
Chris Lattner
276a6e102c
Implement a FIXME: if we're going to insert a cast, we might as well only
...
insert it once!
llvm-svn: 12955
2004-04-14 22:01:22 +00:00
Chris Lattner
7f5e4b6d55
This is a trivial tweak to the addrec insertion code: insert the increment
...
at the bottom of the loop instead of the top. This reduces the number of
overlapping live ranges a lot, for example, eliminating a spill in an important
loop in 183.equake with linear scan.
I still need to make the exit comparison of the loop use the post-incremented
version of this variable, but this is an easy first step.
llvm-svn: 12952
2004-04-14 21:11:25 +00:00
Chris Lattner
fd1cfeeb1d
Add some methods that are useful for updating loop information.
...
llvm-svn: 12871
2004-04-12 20:26:17 +00:00
Chris Lattner
12e1831ffe
Change the call graph class to have TWO external nodes, making call graph
...
SCC passes much more useful. In particular, this should fix the incredibly
stupid missed inlining opportunities that the inliner suffered from.
llvm-svn: 12860
2004-04-12 05:36:32 +00:00
Chris Lattner
a688d42e8c
Hrm, operator new and new[] do not belong here. We should not CSE them! :)
...
llvm-svn: 12859
2004-04-12 05:16:42 +00:00
Chris Lattner
02a9e10e74
operator new & operator new[] do not kill any legal memory locations.
...
llvm-svn: 12833
2004-04-11 18:16:34 +00:00
Chris Lattner
aa1c0d5e76
Allow clients to be more efficient.
...
llvm-svn: 12831
2004-04-11 16:43:07 +00:00
Chris Lattner
474637518d
Add a couple of more functions that cannot access memory (the intrinsics) and
...
don't write to memory
llvm-svn: 12808
2004-04-10 06:55:27 +00:00
Chris Lattner
cb6744360c
Fix a bug Brian found.
...
llvm-svn: 12754
2004-04-07 16:16:11 +00:00
Chris Lattner
fb8a43c586
Sparc don't got not "sqrtl", bum bum bum
...
llvm-svn: 12670
2004-04-05 19:05:15 +00:00
Misha Brukman
21355cfcba
Kill warnings during an optimized compile where assert() disappears.
...
llvm-svn: 12669
2004-04-05 19:00:46 +00:00
Chris Lattner
8b61b8c936
Fix PR312 and IndVarsSimplify/2004-04-05-InvokeCastCrash.llx
...
llvm-svn: 12668
2004-04-05 18:46:55 +00:00
Chris Lattner
9236135e8f
Support getelementptr instructions which use uint's to index into structure
...
types and can have arbitrary 32- and 64-bit integer types indexing into
sequential types.
llvm-svn: 12653
2004-04-05 01:30:19 +00:00
Chris Lattner
3ccb7f2275
Implement test/Regression/Transforms/GCSE/undefined_load.ll
...
llvm-svn: 12641
2004-04-03 00:45:16 +00:00
Chris Lattner
0329ff0b87
Add a break in the default case
...
llvm-svn: 12639
2004-04-03 00:43:03 +00:00
Chris Lattner
409ef7935c
Remove obsolete files
...
llvm-svn: 12633
2004-04-02 20:56:24 +00:00
Chris Lattner
0a34ab8221
Comment out debugging printouts
...
llvm-svn: 12623
2004-04-02 20:26:46 +00:00
Chris Lattner
74911ffd6b
Add a new analysis
...
llvm-svn: 12619
2004-04-02 20:23:17 +00:00
Chris Lattner
ecb0efb6e5
Minor efficiency improvement, finegrainify namespacification
...
llvm-svn: 12517
2004-03-25 22:56:03 +00:00
Chris Lattner
c534fac018
Fix a HORRIBLY NASTY bug that caused siod to stop working last night.
...
llvm-svn: 12479
2004-03-17 23:22:04 +00:00
Chris Lattner
c2eb0678d8
Add some missing functions. Make sure to handle calls together in case the
...
client has another VN implementation that can VN calls.
llvm-svn: 12427
2004-03-16 03:41:35 +00:00
Chris Lattner
19ce9dbb05
Ok, the assertion was bogus. Calls that do not read/write memory should not
...
have an alias set, just like adds and subtracts don't.
llvm-svn: 12422
2004-03-15 06:28:07 +00:00
Chris Lattner
5654b5de80
This assertion is bogus now that calls do not necessarily read/write memory
...
llvm-svn: 12421
2004-03-15 06:24:15 +00:00
Chris Lattner
62771c4bef
Implement CSE of call instructions in the most trivial case. This implements
...
GCSE/call_cse.ll
llvm-svn: 12419
2004-03-15 05:44:59 +00:00
Chris Lattner
cd227e5bdb
Fix a minor bug, implementing GCSE/call_pure_function.ll
...
Also, add some stuff I missed before.
llvm-svn: 12417
2004-03-15 04:18:28 +00:00
Chris Lattner
b0cf0f89be
Don't be COMPLETELY pessimistic in the face of function calls
...
llvm-svn: 12413
2004-03-15 04:08:36 +00:00
Chris Lattner
cb99b04ead
Deinline some virtual methods, provide better mod/ref answers through the
...
use of the boolean queries
llvm-svn: 12410
2004-03-15 04:07:29 +00:00
Chris Lattner
60c61e337a
Pass through the boolean queries
...
llvm-svn: 12409
2004-03-15 04:06:46 +00:00
Chris Lattner
0ea40c6fac
Teach basicaa about some stdc functions.
...
llvm-svn: 12408
2004-03-15 03:36:49 +00:00
Chris Lattner
37b7966121
Fix a tiny bug that caused an incorrect assertion failure poolallocating
...
boxed-sim.
llvm-svn: 12358
2004-03-13 01:14:23 +00:00
Chris Lattner
f7bc6fd913
Rename the intrinsic enum values for llvm.va_* from Intrinsic::va_* to
...
Intrinsic::va*. This avoid conflicting with macros in the stdlib.h file.
llvm-svn: 12356
2004-03-13 00:24:00 +00:00
Chris Lattner
bb08e801d4
Fix a couple of minor problems. Because PHI nodes can use themselves, this
...
could cause infinite loops. Also, getUnderlyingObject can return null
llvm-svn: 12351
2004-03-12 23:12:55 +00:00
Chris Lattner
6bd3783ef8
Implement mod/ref analysis for a trivial case where locals don't escape.
...
This comes up when you have a local array on the stack and you never pass
the address of elements around.
llvm-svn: 12349
2004-03-12 22:39:00 +00:00
Misha Brukman
ffcf81a11b
Simplify code to process CallSites (thanks to Chris).
...
llvm-svn: 12334
2004-03-12 16:20:49 +00:00
Misha Brukman
b5e89d17c2
Evaluate ModRef information in addition to regular ol' pointer analysis.
...
llvm-svn: 12331
2004-03-12 06:15:08 +00:00
Misha Brukman
ee27e80a0b
Implement getModRefInfo() for DSA to calculate whether a function modifies or
...
references a pointer.
llvm-svn: 12330
2004-03-12 06:14:22 +00:00
Misha Brukman
da119ce857
Make code more readable.
...
llvm-svn: 12305
2004-03-12 00:58:41 +00:00
Chris Lattner
405790ecae
Fix PR284: [indvars] Induction variable analysis violates LLVM invariants
...
llvm-svn: 12275
2004-03-10 21:42:19 +00:00
Chris Lattner
9ce3638433
implement new method
...
llvm-svn: 12264
2004-03-09 19:37:06 +00:00
Chris Lattner
9414c55663
Switch to using edge profiling information as the basic source of profile info
...
from using basic block counts.
llvm-svn: 12242
2004-03-08 22:04:08 +00:00
Chris Lattner
83c62c84d6
Refactor implementations
...
llvm-svn: 12240
2004-03-08 21:30:35 +00:00
Chris Lattner
91ea0d3176
Import the trace class from the reoptimizer
...
llvm-svn: 12236
2004-03-08 20:57:27 +00:00
Chris Lattner
de661f7219
If we have edge counts, we can produce block counts. I've verified that
...
using an edge profile to produce block counts gives the exact same numbers
as using a block count directly.
llvm-svn: 12232
2004-03-08 20:03:52 +00:00
Chris Lattner
f3a838662e
Add initial support for reading edge counts. This will be improved to enable
...
translation of edge counts into block/function counts when possible.
llvm-svn: 12229
2004-03-08 18:20:18 +00:00
Chris Lattner
1ae4150e31
Fix a bug handling globals that are constants, but are still external
...
llvm-svn: 12208
2004-03-08 03:52:24 +00:00
Chris Lattner
5a9cae47a4
Fix a minor bug
...
llvm-svn: 12169
2004-03-05 22:04:07 +00:00
Misha Brukman
75729872be
Unbreak the build on Sparc.
...
llvm-svn: 12161
2004-03-05 20:04:40 +00:00
Chris Lattner
f21e7a75d6
Fix a bug in a previous checkin that broke 175.vpr
...
llvm-svn: 12128
2004-03-04 21:36:57 +00:00
Chris Lattner
c885697daa
Add support for strto* and v*printf
...
llvm-svn: 12127
2004-03-04 21:03:54 +00:00
Chris Lattner
48b0fd7101
Add non-crappy support for varargs
...
llvm-svn: 12126
2004-03-04 20:33:47 +00:00
Chris Lattner
ac1eaa43fa
Implement a FIXME, improving the efficiency of DSA on povray.
...
This reduces CBU time from 145s -> 122s (debug build), reduces # allocated nodes
from 129420 to 116477.
llvm-svn: 12125
2004-03-04 19:47:04 +00:00
Chris Lattner
e3fc09a37e
Speed up the cbu pass from taking somewhere near the age of the universe to about 90s on povray
...
llvm-svn: 12123
2004-03-04 19:16:35 +00:00
Chris Lattner
bc7fc82865
Fix BU datastructures with povray!
...
The problem was that we were merging a field of a node with a value that was
deleted. Thanks to bugpoint for reducing povray to a nice small 3 function
example. :)
llvm-svn: 12116
2004-03-04 17:06:53 +00:00
Chris Lattner
e0c90cf983
Minor changes, remove some debugging code that got checked in somehow.
...
Make sure to scope the NodeMap passed into cloneInto so that it doesn't point
to nodes that are deleted. Add some FIXME's for future performance enhancements.
llvm-svn: 12115
2004-03-04 17:05:28 +00:00
Chris Lattner
790bd9d970
Only clone nodes that are needed in the caller, don't clone ALL aux calls. This improves
...
povray from having ~600K nodes and 300K call nodes to 65K nodes and 25K call nodes.
llvm-svn: 12109
2004-03-04 03:57:53 +00:00
Chris Lattner
a141de0f09
Fix a minor bug handling incomplete programs
...
llvm-svn: 12105
2004-03-03 23:00:19 +00:00
Chris Lattner
0e1cd00f2c
Fix a DSA bug that caused DSA to generate incredibly huge graphs and take forever to
...
do it on povray. The problem is that we were not copying globals from callees to
callers unless the existed in both graphs. We should have copied them in the case
where the global pointed to a node that was copied as well.
llvm-svn: 12104
2004-03-03 22:01:09 +00:00
Chris Lattner
a6540122dc
Deinline methods, add fast exit
...
llvm-svn: 12102
2004-03-03 20:55:27 +00:00
Chris Lattner
309a57f0c0
Fix a node mapping problem that was causing the pool allocator to locally allocate
...
nodes that were globally live, thus breaking programs.
llvm-svn: 12094
2004-03-03 05:34:31 +00:00
Chris Lattner
ea4242a575
FINALLY be able to get symbolic type names in the globals graph!
...
llvm-svn: 12082
2004-03-02 21:39:43 +00:00
Chris Lattner
833646d6b8
Really, only if reopen
...
llvm-svn: 12080
2004-03-02 20:46:18 +00:00
Chris Lattner
e7c638e989
Correctly add an array marker on a node when appropriate!
...
llvm-svn: 12055
2004-03-01 19:02:54 +00:00
Chris Lattner
9bf85f216b
Expand on my note-to-self
...
llvm-svn: 12029
2004-03-01 02:44:44 +00:00
Chris Lattner
9e71c09ff5
Only clone global nodes between graphs if both graphs have the global.
...
llvm-svn: 11928
2004-02-27 20:05:15 +00:00
Chris Lattner
138a7dfb62
ADD MORE FUNCTIONS!
...
llvm-svn: 11927
2004-02-27 20:04:48 +00:00
Chris Lattner
d359fbf991
Be a good little compiler and handle direct calls efficiently, even if there
...
are beastly ConstantPointerRefs in the way...
llvm-svn: 11883
2004-02-26 22:07:22 +00:00
Chris Lattner
9e55e31b2d
Fix typo
...
llvm-svn: 11864
2004-02-26 03:45:03 +00:00
Chris Lattner
7990e4dcd0
The node doesn't have to be _no_ node flags, it just has to be complete and
...
not have any globals.
llvm-svn: 11863
2004-02-26 03:43:43 +00:00
Chris Lattner
948fffa8a2
Add _more_ functions
...
llvm-svn: 11862
2004-02-26 03:43:08 +00:00
Chris Lattner
9fd0c48f80
Two changes:
...
1. Functions do not make things incomplete, only variables
2. Constant global variables no longer need to be marked incomplete, because
we are guaranteed that the initializer for the global will be in the
graph we are hacking on now. This makes resolution of indirect calls happen
a lot more in the bu pass, supports things like vtables and the C counterparts
(giant constant arrays of function pointers), etc...
Testcase here: test/Regression/Analysis/DSGraph/constant_globals.ll
llvm-svn: 11852
2004-02-25 23:36:08 +00:00
Chris Lattner
7d273bc532
When building local graphs, clone the initializer for constant globals into each
...
local graph that uses the global.
llvm-svn: 11850
2004-02-25 23:31:02 +00:00
Chris Lattner
9fe3bf296d
Simplify the dead node elimination stuff
...
Make the incompleteness marker faster by looping directly over the globals
instead of over the scalars to find the globals
Fix a bug where we didn't mark a global incomplete if it didn't have any
outgoing edges. This wouldn't break any current clients but is still wrong.
llvm-svn: 11848
2004-02-25 23:08:00 +00:00
Chris Lattner
a9f67b5ab8
Add a bunch more functions
...
llvm-svn: 11847
2004-02-25 23:06:40 +00:00
Chris Lattner
d99d965f8c
Try harder to get symbol info
...
llvm-svn: 11846
2004-02-25 23:06:30 +00:00
Chris Lattner
4f09004dff
Add a bunch more functions used by perlbmk
...
llvm-svn: 11824
2004-02-25 17:43:20 +00:00
Chris Lattner
9036c86b14
Add support for 'rename'
...
llvm-svn: 11813
2004-02-24 22:17:00 +00:00
Chris Lattner
d9652be664
Add support for remove, fwrite, and fread
...
Also fix problem where we didn't check to see if a node pointer was null.
Though fclose(null) doesn't make a lot of sense, 300.twolf does it.
llvm-svn: 11810
2004-02-24 22:02:48 +00:00
Chris Lattner
63b79422f3
Fix a soon-to-be-missing #include
...
llvm-svn: 11707
2004-02-22 06:26:17 +00:00
Chris Lattner
573441bfbd
Use isNull instead of getNode() to test for existence of a node, this is cheaper.
...
FIX MAJOR BUG, whereby we didn't merge null edges correctly. Correcting this
fixes poolallocation on 175.vpr, and possibly others.
llvm-svn: 11695
2004-02-22 00:53:54 +00:00
Chris Lattner
7bff00313e
Fix an iterator invalidation problem which was causing some nodes to not be
...
correctly merged over!
llvm-svn: 11693
2004-02-21 22:28:26 +00:00
Chris Lattner
458704f675
Use handy method
...
llvm-svn: 11692
2004-02-21 22:27:31 +00:00
Chris Lattner
dacc6a7448
Instead of cloning the globals for main into the globals graph at the end of
...
BU propagation, clone the globals into the GG of EACH FUNCTION that finishes
processing! The GlobalsGraph *must* include all globals and effects from
all functions in the program. Fixing this makes pool allocation work better
on 175.vpr, but it still ultimately crashes.
llvm-svn: 11686
2004-02-21 00:30:28 +00:00
Chris Lattner
0f9200e5a5
There is no need to merge the globals graph into the function graphs at the
...
end of the BU and CBU passes. The globals will be marked incomplete, so it
doesn't matter if they are missing some info, and merging isn't guaranteed
to bring everything in anyway!
llvm-svn: 11684
2004-02-20 23:52:15 +00:00
Chris Lattner
31f8fa66cb
Add two missing returns, which caused us to be very pessimistic about the
...
printf and scanf families!
llvm-svn: 11683
2004-02-20 23:27:09 +00:00
Chris Lattner
4653c4cb50
Add support for some string functions, the scanf family, and sprintf
...
llvm-svn: 11673
2004-02-20 20:27:11 +00:00
Chris Lattner
d9e1a49650
When we complete the bottom-up pass, make sure to merge the globals in 'main' into
...
the globals graph.
llvm-svn: 11562
2004-02-17 19:06:47 +00:00
Chris Lattner
2c0736be99
Only spit out warning for functions that take pointers, not for sin and the like
...
Add more special case handling for stdio functions. I feel dirty, how about you?
llvm-svn: 11506
2004-02-16 22:57:19 +00:00
Chris Lattner
513e4c7bd9
memset and bcopy and now unified by the llvm.memset intrinsic
...
llvm-svn: 11503
2004-02-16 18:37:40 +00:00
Chris Lattner
cd6a595db5
No need to scan zero initializers. This should make DSA a bit faster.
...
llvm-svn: 11471
2004-02-15 05:53:42 +00:00
Chris Lattner
33ed4f9de9
Add support for a bunch more functions
...
llvm-svn: 11395
2004-02-13 21:21:48 +00:00
Chris Lattner
fbacee0077
Add support for fopen/fclose. Specifically with fopen, we were marking all of the
...
operands as incomplete, though fopen is known to only read them. This just adds
fclose for symmetry, though it doesn't gain anything. This makes the dsgraphs for
181.mcf much more precise.
llvm-svn: 11390
2004-02-13 20:05:32 +00:00
Chris Lattner
dd8e3f4208
Restructure code to handle memcpy/memmove
...
llvm-svn: 11374
2004-02-13 16:09:54 +00:00
Chris Lattner
ffd9c8a00b
Cosmetic improvements to this option.
...
llvm-svn: 11331
2004-02-11 19:14:04 +00:00
Chris Lattner
66e7209785
Actually load profiling information now! Block layout can use real, live,
...
actual profile info, and works! :)
llvm-svn: 11324
2004-02-11 18:21:05 +00:00
Chris Lattner
16ad30203c
Fix a typeo
...
llvm-svn: 11323
2004-02-11 18:20:41 +00:00
Chris Lattner
36f91c80f4
Fix copy-and-pastos
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llvm-svn: 11319
2004-02-11 06:10:18 +00:00
Chris Lattner
c456d0cbc7
Add skeleton profileinfoloader pass. This will be enhanced to actually LOAD
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a profile tommorow. :)
llvm-svn: 11318
2004-02-11 06:10:05 +00:00
Chris Lattner
427c8ee657
Factor this code out of llvm-prof
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llvm-svn: 11314
2004-02-11 05:54:25 +00:00
Chris Lattner
c9900e2eb3
Make sure to register the 'no profile' implementation as the default for ProfileInfo
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llvm-svn: 11309
2004-02-11 04:47:54 +00:00
Chris Lattner
f8077b7801
Simplify implementation, and probably speed things up too.
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llvm-svn: 11308
2004-02-11 03:57:16 +00:00
Chris Lattner
a81258a786
An initial implementation of an LLVM ProfileInfo class which is designed to
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eventually allow Passes to use profiling information to direct them.
llvm-svn: 11294
2004-02-10 22:11:42 +00:00
Chris Lattner
16690fad3d
Adjust to the changed StructType interface. In particular, getElementTypes() is gone.
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llvm-svn: 11228
2004-02-09 04:37:31 +00:00
Chris Lattner
838c2dd5af
Add one that I missed
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llvm-svn: 11179
2004-02-08 01:53:10 +00:00
Chris Lattner
cc1376078c
Instead of callign removeTriviallyDeadNodes on the global graph every time
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removeDeadNodes is called, only call it at the end of the pass being run.
This saves 1.3 seconds running DSA on 177.mesa (5.3->4.0s), which is
pretty big. This is only possible because of the automatic garbage
collection done on forwarding nodes.
llvm-svn: 11178
2004-02-08 01:51:48 +00:00
Chris Lattner
e2ee216e1f
Remove another unneeded call.
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llvm-svn: 11177
2004-02-08 01:40:40 +00:00
Chris Lattner
85ba7bbf78
This call is no longer needed now that merging does not produce garbage
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llvm-svn: 11176
2004-02-08 01:38:34 +00:00
Chris Lattner
32a3eb0b88
Substantially improve the DSA code by removing 'forwarding' nodes from
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DSGraphs while they are forwarding. When the last reference to the forwarding
node is dropped, the forwarding node is autodeleted. This should simplify
removeTriviallyDead nodes, and is only (efficiently) possible because we are
using an ilist of dsnodes now.
llvm-svn: 11175
2004-02-08 01:27:18 +00:00