a60738316e
Fix a problem exposed by the et-forest work. Load-vn needs these passes live
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whenever it is live, not just when load-vn is computed initially
llvm-svn: 25146
2006-01-08 09:10:04 +00:00
5488847304
the correct fix was to fix AliasAnalysis.getModRefInfo
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llvm-svn: 22268
2005-06-20 15:25:22 +00:00
805d84a077
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.
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llvm-svn: 22266
2005-06-20 15:02:05 +00:00
01808caded
Remove trailing whitespace
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llvm-svn: 21416
2005-04-21 21:13:18 +00:00
1ec230e665
Due to previous simplifications, we can simplify the data structures being
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used here.
llvm-svn: 19913
2005-01-29 07:04:10 +00:00
ce0fa4c109
Properly handle volatile.
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llvm-svn: 19912
2005-01-29 06:42:34 +00:00
a194357025
Remove some useless map operations. Loads/stores that are in the same
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BB as the load are not included in the Cand* sets at all.
llvm-svn: 19911
2005-01-29 06:39:25 +00:00
be62e72273
Before doing expensive global analysis, check to make sure the pointer is
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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
fe7a9a242e
Minor simplification/speedup. Replaces a set lookup with a pointer comparison.
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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
787aed675d
Eliminate generality that is not buying us anything. In particular, this
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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
b25abcb1fa
If we see:
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%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
aefd5fa18a
Eliminate a virtual method call
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llvm-svn: 18964
2004-12-15 18:14:04 +00:00
a5c04ee50f
Fixes to make LLVM compile with vc7.1.
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Patch contributed by Paolo Invernizzi!
llvm-svn: 16152
2004-09-03 18:19:51 +00:00
63b38bd2ed
Fix #includes of i*.h => Instructions.h as per PR403.
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llvm-svn: 15334
2004-07-29 17:30:56 +00:00
38b79e8fbc
Make the create...() functions for some of these passes return a FunctionPass *.
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llvm-svn: 15276
2004-07-27 17:43:21 +00:00
32502b8d4a
Implement the interfaces to update value numbering information. Add an
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assert.
llvm-svn: 13679
2004-05-23 21:13:24 +00:00
8ed3c8aa13
Implement test/Regression/Transforms/GCSE/undefined_load.ll
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llvm-svn: 12641
2004-04-03 00:45:16 +00:00
8ad948ddbd
Add some missing functions. Make sure to handle calls together in case the
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client has another VN implementation that can VN calls.
llvm-svn: 12427
2004-03-16 03:41:35 +00:00
53a3587997
Implement CSE of call instructions in the most trivial case. This implements
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GCSE/call_cse.ll
llvm-svn: 12419
2004-03-15 05:44:59 +00:00
e3f247bcac
In a "seeing the forest through the trees" kinda situation, I realized that a
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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
d3e4d81ad7
This is a big diff with no functionality change. We just reorder some code,
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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
90b9043ea5
finegrainify namespacification
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llvm-svn: 11130
2004-02-05 05:51:40 +00:00
cb435541c4
Fixed Chris' typo.
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llvm-svn: 11128
2004-02-05 04:45:21 +00:00
5bab6301ac
Implement optimizations for handling large basic blocks.
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llvm-svn: 11126
2004-02-05 00:36:43 +00:00
960707c335
Put all LLVM code into the llvm namespace, as per bug 109.
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llvm-svn: 9903
2003-11-11 22:41:34 +00:00
482202a601
Added LLVM project notice to the top of every C++ source file.
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Header files will be on the way.
llvm-svn: 9298
2003-10-20 19:43:21 +00:00
329983228f
Fixed spelling and grammar.
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llvm-svn: 8478
2003-09-11 18:14:24 +00:00
250f976eb3
Spell `definitely' correctly.
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llvm-svn: 8466
2003-09-11 15:31:17 +00:00
c4e76944d7
Fix bug: RLE-Preserve-Volatile.ll
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Volatile loads and stores must not be value numbered
llvm-svn: 8398
2003-09-08 18:13:58 +00:00
7eb05a170a
Spell `necessary' correctly.
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llvm-svn: 7944
2003-08-18 14:43:39 +00:00
426b890f0d
If the alias analysis algorithm we are using can provide MUST alias information,
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expose it directly as value numbering information
llvm-svn: 6972
2003-06-29 00:53:34 +00:00
98105944b3
Implement forwarding from stores to loads of must-aliased pointers.
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This implements: GCSE/2003-06-13-LoadStoreEliminate.ll
llvm-svn: 6694
2003-06-16 12:06:41 +00:00
0edc91ff2a
Calculate and pass load sizes to the alias analysis infrastructure
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llvm-svn: 5635
2003-02-26 19:27:35 +00:00
2dd49e525c
Initial implementation of value numbering for load instructions
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llvm-svn: 3540
2002-08-30 20:28:10 +00:00
Chris Lattner