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43 Commits

Author SHA1 Message Date
Devang Patel
67ede3d635 Use DominatorTree instead of ETForest. 
llvm-svn: 37505
 2007-06-07 23:53:38 +00:00
Devang Patel
cd45427a87 Drop 'const' 
llvm-svn: 36662
 2007-05-03 01:11:54 +00:00
Devang Patel
8ee9065162 Use 'static const char' instead of 'static const int'. 
Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.

llvm-svn: 36652
 2007-05-02 21:39:20 +00:00
Devang Patel
38a66bc82e Do not use typeinfo to identify pass in pass manager. 
llvm-svn: 36632
 2007-05-01 21:15:47 +00:00
Chris Lattner
e4323f863a Remove use of Instruction::getNext 
llvm-svn: 36201
 2007-04-17 17:52:45 +00:00
Owen Anderson
5403a248af Expunge DomSet from LoadValueNumbering. This is part of the continuing 
work on PR1171.

llvm-svn: 35723
 2007-04-07 04:43:07 +00:00
Reid Spencer
598f6d293b Make classes in anonymous namespaces use VISIBILITY_HIDDEN to help reduce 
LLVM's footprint and speed up linking.

llvm-svn: 33941
 2007-02-05 23:42:17 +00:00
Chris Lattner
8a59e8be23 simplify AnalysisGroup registration, eliminating one typeid call. 
llvm-svn: 29932
 2006-08-28 00:42:29 +00:00
Chris Lattner
a39dcb5377 eliminate RegisterOpt. It does the same thing as RegisterPass. 
llvm-svn: 29925
 2006-08-27 22:42:52 +00:00
Chris Lattner
4266c0b9cb Fix a problem exposed by the et-forest work. Load-vn needs these passes live 
whenever it is live, not just when load-vn is computed initially

llvm-svn: 25146
 2006-01-08 09:10:04 +00:00
Andrew Lenharth
4e1c8055ea the correct fix was to fix AliasAnalysis.getModRefInfo 
llvm-svn: 22268
 2005-06-20 15:25:22 +00:00
Andrew Lenharth
262b657737 prevent GCSE from forwarding stores to loads around vaarg. This is uggly, and I am trying to fix the AliasInfo, as it should catch the problem instead. 
llvm-svn: 22266
 2005-06-20 15:02:05 +00:00
Misha Brukman
122d682689 Remove trailing whitespace 
llvm-svn: 21416
 2005-04-21 21:13:18 +00:00
Chris Lattner
703dfdda2a Due to previous simplifications, we can simplify the data structures being 
used here.

llvm-svn: 19913
 2005-01-29 07:04:10 +00:00
Chris Lattner
0823ac4234 Properly handle volatile. 
llvm-svn: 19912
 2005-01-29 06:42:34 +00:00
Chris Lattner
8df4ba51b4 Remove some useless map operations. Loads/stores that are in the same 
BB as the load are not included in the Cand* sets at all.

llvm-svn: 19911
 2005-01-29 06:39:25 +00:00
Chris Lattner
af286e3600 Before doing expensive global analysis, check to make sure the pointer is 
not invalidated on entry and on exit of the block.  This fixes some N^2
behavior in common cases, and speeds up gcc another 5% to 22.35s.

llvm-svn: 19910
 2005-01-29 06:31:53 +00:00
Chris Lattner
43ccc5c945 Minor simplification/speedup. Replaces a set lookup with a pointer comparison. 
This speeds up 176.gcc from 25.73s to 23.48s, which is 9.5%

llvm-svn: 19907
 2005-01-29 06:20:55 +00:00
Chris Lattner
ae8d4bb675 Eliminate generality that is not buying us anything. In particular, this 
will cause us to miss cases where the input pointer to a load could be value
numbered to another load.  Something like this:


  %X = load int* %P1
  %Y = load int* %P2

Those are obviously the same if P1/P2 are the same.  The code this patch
removes attempts to handle that.  However, since GCSE iterates, this doesn't
actually buy us anything: GCSE will first replace P1 or P2 with the other
one, then the load can be value numbered as equal.

Removing this code speeds up gcse a lot.  On 176.gcc in debug mode, this
speeds up gcse from 29.08s -> 25.73s, a 13% savings.

llvm-svn: 19906
 2005-01-29 06:11:16 +00:00
Chris Lattner
68d73bed4a If we see: 
%A = alloca int
  %V = load int* %A

value number %V to undef, not 0.

llvm-svn: 19905
 2005-01-29 05:57:01 +00:00
Chris Lattner
be18a7e20a Eliminate a virtual method call 
llvm-svn: 18964
 2004-12-15 18:14:04 +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
Misha Brukman
58104df77b Fix #includes of i*.h => Instructions.h as per PR403. 
llvm-svn: 15334
 2004-07-29 17:30:56 +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
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
3ccb7f2275 Implement test/Regression/Transforms/GCSE/undefined_load.ll 
llvm-svn: 12641
 2004-04-03 00:45:16 +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
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
ffc5eee17a In a "seeing the forest through the trees" kinda situation, I realized that a 
complete rewrite of load-vn will make it a bit faster.  This changes speeds up
the gcse pass (which uses load-vn) from 25.45s to 0.42s on the testcase in
PR209.

I've also verified that this gives the exact same results as the old one.

llvm-svn: 11132
 2004-02-05 17:20:00 +00:00
Chris Lattner
1a04f2a635 This is a big diff with no functionality change. We just reorder some code, 
which causes big reindentation.  While I'm at it, I fix the fixme by removing
some dead code.

llvm-svn: 11131
 2004-02-05 05:56:23 +00:00
Chris Lattner
7d5e3febb7 finegrainify namespacification 
llvm-svn: 11130
 2004-02-05 05:51:40 +00:00
Tanya Lattner
d7b137d9fb Fixed Chris' typo. 
llvm-svn: 11128
 2004-02-05 04:45:21 +00:00
Chris Lattner
b721589bc0 Implement optimizations for handling large basic blocks. 
llvm-svn: 11126
 2004-02-05 00:36:43 +00:00
Brian Gaeke
d25f86d683 Put all LLVM code into the llvm namespace, as per bug 109. 
llvm-svn: 9903
 2003-11-11 22:41:34 +00:00
John Criswell
b402729b30 Added LLVM project notice to the top of every C++ source file. 
Header files will be on the way.

llvm-svn: 9298
 2003-10-20 19:43:21 +00:00
Misha Brukman
b9a4ddbfc5 Fixed spelling and grammar. 
llvm-svn: 8478
 2003-09-11 18:14:24 +00:00
Misha Brukman
6c4ffae6a5 Spell `definitely' correctly. 
llvm-svn: 8466
 2003-09-11 15:31:17 +00:00
Chris Lattner
f3505abe43 Fix bug: RLE-Preserve-Volatile.ll 
Volatile loads and stores must not be value numbered

llvm-svn: 8398
 2003-09-08 18:13:58 +00:00
Misha Brukman
56f7db4178 Spell `necessary' correctly. 
llvm-svn: 7944
 2003-08-18 14:43:39 +00:00
Chris Lattner
d1ca41db68 If the alias analysis algorithm we are using can provide MUST alias information, 
expose it directly as value numbering information

llvm-svn: 6972
 2003-06-29 00:53:34 +00:00
Chris Lattner
24441a15c5 Implement forwarding from stores to loads of must-aliased pointers. 
This implements: GCSE/2003-06-13-LoadStoreEliminate.ll

llvm-svn: 6694
 2003-06-16 12:06:41 +00:00
Chris Lattner
5afbabc83b Calculate and pass load sizes to the alias analysis infrastructure 
llvm-svn: 5635
 2003-02-26 19:27:35 +00:00
Chris Lattner
9c31585ee4 Initial implementation of value numbering for load instructions 
llvm-svn: 3540
 2002-08-30 20:28:10 +00:00