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* the correct fix was to fix AliasAnalysis.getModRefInfoAndrew Lenharth2005-06-201-4/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22268 91177308-0d34-0410-b5e6-96231b3b80d8
* prevent GCSE from forwarding stores to loads around vaarg. This is uggly, ↵Andrew Lenharth2005-06-201-0/+4
| | | | | | and I am trying to fix the AliasInfo, as it should catch the problem instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22266 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove trailing whitespaceMisha Brukman2005-04-211-14/+14
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* Due to previous simplifications, we can simplify the data structures beingChris Lattner2005-01-291-35/+36
| | | | | | | used here. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19913 91177308-0d34-0410-b5e6-96231b3b80d8
* Properly handle volatile.Chris Lattner2005-01-291-9/+11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19912 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove some useless map operations. Loads/stores that are in the sameChris Lattner2005-01-291-10/+0
| | | | | | | BB as the load are not included in the Cand* sets at all. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19911 91177308-0d34-0410-b5e6-96231b3b80d8
* Before doing expensive global analysis, check to make sure the pointer isChris Lattner2005-01-291-46/+50
| | | | | | | | 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19910 91177308-0d34-0410-b5e6-96231b3b80d8
* Minor simplification/speedup. Replaces a set lookup with a pointer comparison.Chris Lattner2005-01-291-4/+3
| | | | | | | This speeds up 176.gcc from 25.73s to 23.48s, which is 9.5% git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19907 91177308-0d34-0410-b5e6-96231b3b80d8
* Eliminate generality that is not buying us anything. In particular, thisChris Lattner2005-01-291-32/+13
| | | | | | | | | | | | | | | | | | | | 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19906 91177308-0d34-0410-b5e6-96231b3b80d8
* If we see:Chris Lattner2005-01-291-4/+3
| | | | | | | | | | %A = alloca int %V = load int* %A value number %V to undef, not 0. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19905 91177308-0d34-0410-b5e6-96231b3b80d8
* Eliminate a virtual method callChris Lattner2004-12-151-2/+5
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* Fixes to make LLVM compile with vc7.1.Alkis Evlogimenos2004-09-031-0/+1
| | | | | | | Patch contributed by Paolo Invernizzi! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16152 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix #includes of i*.h => Instructions.h as per PR403.Misha Brukman2004-07-291-2/+1
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* Make the create...() functions for some of these passes return a FunctionPass *.Brian Gaeke2004-07-271-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15276 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement the interfaces to update value numbering information. Add anChris Lattner2004-05-231-2/+24
| | | | | | | assert. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13679 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement test/Regression/Transforms/GCSE/undefined_load.llChris Lattner2004-04-031-0/+14
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* Add some missing functions. Make sure to handle calls together in case theChris Lattner2004-03-161-1/+1
| | | | | | | client has another VN implementation that can VN calls. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12427 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement CSE of call instructions in the most trivial case. This implementsChris Lattner2004-03-151-11/+139
| | | | | | | GCSE/call_cse.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12419 91177308-0d34-0410-b5e6-96231b3b80d8
* In a "seeing the forest through the trees" kinda situation, I realized that aChris Lattner2004-02-051-227/+230
| | | | | | | | | | | 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11132 91177308-0d34-0410-b5e6-96231b3b80d8
* This is a big diff with no functionality change. We just reorder some code,Chris Lattner2004-02-051-73/+60
| | | | | | | | which causes big reindentation. While I'm at it, I fix the fixme by removing some dead code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11131 91177308-0d34-0410-b5e6-96231b3b80d8
* finegrainify namespacificationChris Lattner2004-02-051-5/+2
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* Fixed Chris' typo.Tanya Lattner2004-02-051-1/+1
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* Implement optimizations for handling large basic blocks.Chris Lattner2004-02-051-29/+77
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* Put all LLVM code into the llvm namespace, as per bug 109.Brian Gaeke2003-11-111-2/+4
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* Added LLVM project notice to the top of every C++ source file.John Criswell2003-10-201-0/+7
| | | | | | | Header files will be on the way. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9298 91177308-0d34-0410-b5e6-96231b3b80d8
* Fixed spelling and grammar.Misha Brukman2003-09-111-2/+2
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* Spell `definitely' correctly.Misha Brukman2003-09-111-1/+1
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* Fix bug: RLE-Preserve-Volatile.llChris Lattner2003-09-081-2/+6
| | | | | | | Volatile loads and stores must not be value numbered git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8398 91177308-0d34-0410-b5e6-96231b3b80d8
* Spell `necessary' correctly.Misha Brukman2003-08-181-1/+1
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* If the alias analysis algorithm we are using can provide MUST alias information,Chris Lattner2003-06-291-0/+5
| | | | | | | expose it directly as value numbering information git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6972 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement forwarding from stores to loads of must-aliased pointers.Chris Lattner2003-06-161-14/+96
| | | | | | | This implements: GCSE/2003-06-13-LoadStoreEliminate.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6694 91177308-0d34-0410-b5e6-96231b3b80d8
* Calculate and pass load sizes to the alias analysis infrastructureChris Lattner2003-02-261-8/+19
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* Initial implementation of value numbering for load instructionsChris Lattner2002-08-301-0/+233
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3540 91177308-0d34-0410-b5e6-96231b3b80d8
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