fc678e2af5
introduce a typedef, no functionality change.
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llvm-svn: 60272
2008-11-30 02:30:50 +00:00
1b810bd5e6
Change NonLocalDeps to be a densemap of pointers to densemap
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instead of containing them by value. This increases the density
(!) of NonLocalDeps as well as making the reallocation case
faster. This speeds up gvn on 403.gcc by 2% and makes room for
future improvements.
I'm not super thrilled with having to explicitly manage the new/delete
of the map, but it is necesary for the next change.
llvm-svn: 60271
2008-11-30 02:28:25 +00:00
60444f8aa5
implement a fixme by introducing a new getDependencyFromInternal
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method that returns its result as a DepResultTy instead of as a
MemDepResult. This reduces conversion back and forth.
llvm-svn: 60266
2008-11-30 01:26:32 +00:00
3d5d5f2c6d
REmove an old fixme, resolve another fixme by adding liberal
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comments about what this class does.
llvm-svn: 60264
2008-11-30 01:17:08 +00:00
63bd586d35
Eliminate the dropInstruction method, which is not needed any more.
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Fix a subtle iterator invalidation bug I introduced in the last commit.
llvm-svn: 60258
2008-11-29 23:30:39 +00:00
e7d7e13bf7
implement some fixme's: when deleting an instruction with
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an entry in the nonlocal deps map, don't reset entries
referencing that instruction to [dirty, null], instead, set
them to [dirty,next] where next is the instruction after the
deleted one. Use this information in the non-local deps
code to avoid rescanning entire blocks.
This speeds up GVN slightly by avoiding pointless work. On
403.gcc this makes GVN 1.5% faster.
llvm-svn: 60256
2008-11-29 22:02:15 +00:00
1c6b62eb4d
Change MemDep::getNonLocalDependency to return its results as
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a smallvector instead of a DenseMap. This speeds up GVN by 5%
on 403.gcc.
llvm-svn: 60255
2008-11-29 21:33:22 +00:00
f280b0c729
reimplement getNonLocalDependency with a simpler worklist
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formulation that is faster and doesn't require nonLazyHelper.
Much less code.
llvm-svn: 60253
2008-11-29 21:22:42 +00:00
5661fead0b
tidy up some variable names.
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llvm-svn: 60243
2008-11-29 09:22:14 +00:00
9f1988ab6c
rename some maps.
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llvm-svn: 60242
2008-11-29 09:20:15 +00:00
51ba8d0630
Split getDependency into getDependency and getDependencyFrom, the
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former does caching, the later doesn't. This dramatically simplifies
the logic in getDependency and getDependencyFrom.
llvm-svn: 60234
2008-11-29 03:47:00 +00:00
e4d32791ef
Now that DepType is private, we can start cleaning up some of its uses:
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Document the Dirty value more precisely, use it for the uninitialized
DepResultTy value. Change reverse mappings to be from an instruction*
instead of DepResultTy, and stop tracking other forms. This makes it more
clear that we only care about the instruction cases.
Eliminate a DepResultTy,bool pair by using Dirty in the local case as well,
shrinking the map and simplifying the code.
This speeds up GVN by ~3% on 403.gcc.
llvm-svn: 60232
2008-11-29 03:22:12 +00:00
7f9c8a0f05
Introduce and use a new MemDepResult class to hold the results of a memdep
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query. This makes it crystal clear what cases can escape from MemDep that
the clients have to handle. This also gives the clients a nice simplified
interface to it that is easy to poke at.
This patch also makes DepResultTy and MemoryDependenceAnalysis::DepType
private, yay.
llvm-svn: 60231
2008-11-29 02:29:27 +00:00
de04e1173a
Reimplement the internal abstraction used by MemDep in terms
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of a pointer/int pair instead of a manually bitmangled pointer.
This forces clients to think a little more about checking the
appropriate pieces and will be useful for internal
implementation improvements later.
I'm not particularly happy with this. After going through this
I don't think that the clients of memdep should be exposed to
the internal type at all. I'll fix this in a subsequent commit.
This has no functionality change.
llvm-svn: 60230
2008-11-29 01:43:36 +00:00
08f3c00562
comment cleanups.
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llvm-svn: 60220
2008-11-28 22:41:36 +00:00
2916a4b589
forward declare CallSite instead of #includ'ing it.
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llvm-svn: 60217
2008-11-28 21:47:19 +00:00
e5fd5c29de
rename "ping" to "verifyRemoved". I don't know why 'ping' what chosen,
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but it doesn't make any sense at all.
Also make the method const, private, and fit in 80 cols while we're at it.
llvm-svn: 60215
2008-11-28 21:42:09 +00:00
cfa414fe9e
comment and indentation improvements.
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llvm-svn: 60214
2008-11-28 21:36:43 +00:00
a79db30d28
Tidy up several unbeseeming casts from pointer to intptr_t.
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llvm-svn: 55779
2008-09-04 17:05:41 +00:00
718da668ab
PassInfo keep tracks whether a pass is an analysis pass or not.
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llvm-svn: 48554
2008-03-19 21:56:59 +00:00
af75ab8130
Do not use virtual function to identify an analysis pass.
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llvm-svn: 48520
2008-03-19 00:48:41 +00:00
864970e9b6
Identify Analysis pass.
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Do not run analysis pass again if analysis info is still available.
This fixes PR1441.
llvm-svn: 48476
2008-03-18 00:39:19 +00:00
00dba4f734
Re-apply the patch to improve the optimizations of memcpy's, with several
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bugs fixed. This now passes PPC bootstrap.
llvm-svn: 47026
2008-02-12 21:15:18 +00:00
e9cc742a17
Don't attribute in file headers anymore. See llvmdev for the
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discussion of this change. Boy are my fingers tired. ;-)
llvm-svn: 45411
2007-12-29 19:59:42 +00:00
086b2c4537
Fix several cache coherence bugs in MemDep/GVN that were found. Also add some (disabled) debugging code
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to make such problems easier to diagnose in the future, written by Duncan Sands.
llvm-svn: 44695
2007-12-08 01:37:09 +00:00
c201cbc802
Add a flag to mark a dirty cache entry. This is not yet used, but will eventually
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help non-local memdep caching.
llvm-svn: 42137
2007-09-19 16:13:57 +00:00
5f208bea91
Cache non-local memory dependence analysis. This is a significant compile
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time performance win in most cases.
llvm-svn: 41126
2007-08-16 21:27:05 +00:00
9b1cc8cac0
Make NonLocal and None const in the right way. :-)
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llvm-svn: 40961
2007-08-09 04:42:44 +00:00
927f62a3a1
Add one more comment.
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llvm-svn: 40949
2007-08-08 21:54:33 +00:00
064bad44d1
Cleanup and comment-ize the memdep header.
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llvm-svn: 40948
2007-08-08 21:53:20 +00:00
b84d3b1c92
Change the None and NonLocal markers in memdep to be const.
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llvm-svn: 40946
2007-08-08 21:39:39 +00:00
a64832f60e
Get rid of unnecessary #include.
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llvm-svn: 40885
2007-08-07 00:38:16 +00:00
68c6732d2c
Clean up a bunch of caching stuff in memdep. This reduces the time to run GVN
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on 403.gcc from ~15s to ~10s.
llvm-svn: 40884
2007-08-07 00:33:45 +00:00
c321e5e272
Make non-local memdep not be recursive, and fix a bug on 403.gcc that this exposed.
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llvm-svn: 40692
2007-08-01 22:01:54 +00:00
87801e8773
Fix GLIBCXX_DEBUG error owing to dereference of end iterator. There's
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no guarantee that an instruction returned by getDependency exists in
the maps.
llvm-svn: 40647
2007-07-31 20:01:27 +00:00
3f3ca5444e
Forgot to include this file in my last commit.
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llvm-svn: 40496
2007-07-25 21:30:15 +00:00
5e5599b7ce
Add basic support for performing whole-function RLE.
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Note: This has not yet been thoroughly tested. Use at your own risk.
llvm-svn: 40489
2007-07-25 19:57:03 +00:00
d998be79cc
Add initial support for non-local memory dependence analysis.
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NOTE: This has only been cursorily tested. Expected improvements soon.
llvm-svn: 40476
2007-07-24 21:52:37 +00:00
7fcaaadf1c
Add support for walking up memory def chains, which enables finding many more
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dead stores on 400.perlbench.
llvm-svn: 39929
2007-07-16 21:52:50 +00:00
9c88457abe
Add support for finding the dependencies of call and invoke instructions.
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llvm-svn: 38497
2007-07-10 17:59:22 +00:00
47352db672
Fix a bunch of things from Chris' feedback
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llvm-svn: 38493
2007-07-10 17:08:11 +00:00
c0daf5fe53
A first stab at memory dependence analysis. This is an interface on top of
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alias analysis, adding caching and lazy computation of queries. This will
be used in planned improvements to memory access optimizations.
llvm-svn: 37958
2007-07-06 23:14:35 +00:00
Chris Lattner