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19 Commits

Author SHA1 Message Date
Chad Rosier
618c1dbd29 Propagate TargetLibraryInfo throughout ConstantFolding.cpp and 
InstructionSimplify.cpp.  Other fixups as needed.
Part of rdar://10500969

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145559 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-12-01 03:08:23 +00:00
Eli Friedman
18ead6b587 Fix a couple hash functions so that they do not depend on undefined shifts. Based on patch by Ahmed Charles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141820 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-12 22:00:26 +00:00
Eli Friedman
2bc3d52b9a Change a bunch of isVolatile() checks to check for atomic load/store as well. 
No tests; these changes aren't really interesting in the sense that the logic is the same for volatile and atomic.

I believe this completes all of the changes necessary for the optimizer to handle loads and stores correctly.  I'm going to try and come up with some additional testing, though.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139533 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-12 20:23:13 +00:00
Chris Lattner
e508dd4c75 Duncan deftly points out that readnone functions aren't 
invalidated by stores, so they can be handled as 'simple'
operations.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122785 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-03 23:38:13 +00:00
Chris Lattner
10b883b13f stength reduce my previous patch a bit. The only instructions 
that are allowed to have metadata operands are intrinsic calls,
and the only ones that take metadata currently return void.
Just reject all void instructions, which should not be value
numbered anyway.  To future proof things, add an assert to the
getHashValue impl for calls to check that metadata operands 
aren't present.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122759 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-03 18:43:03 +00:00
Chris Lattner
a12ba39a1d fix PR8895: metadata operands don't have a strong use of their 
nested values, so they can change and drop to null, which can
change the hash and cause havok.

It turns out that it isn't a good idea to value number stuff
with metadata operands anyway, so... don't.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122758 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-03 18:28:15 +00:00
Chris Lattner
75637154c3 earlycse can do trivial with-a-block dead store 
elimination as well.  This deletes 60 stores in 176.gcc
that largely come from bitfield code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122736 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-03 04:17:24 +00:00
Chris Lattner
71230acbbe switch the load table to use a recycling bump pointer allocator, 
speeding earlycse up by 6%.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122733 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-03 03:53:50 +00:00
Chris Lattner
ef87fc2e0a now that loads are in their own table, we can implement 
store->load forwarding.  This allows EarlyCSE to zap 600 more
loads from 176.gcc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122732 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-03 03:46:34 +00:00
Chris Lattner
85db61066a split loads and calls into separate tables. Loads are now just indexed 
by their pointer instead of using MemoryValue to wrap it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122731 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-03 03:41:27 +00:00
Chris Lattner
a60a8b0eb7 various cleanups, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122729 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-03 03:28:23 +00:00
Chris Lattner
8e7f0d70c7 Teach EarlyCSE to do trivial CSE of loads and read-only calls. 
On 176.gcc, this catches 13090 loads and calls, and increases the
number of simple instructions CSE'd from 29658 to 36208.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122727 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-03 03:18:43 +00:00
Chris Lattner
f19745947d rename InstValue to SimpleValue, add some comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122725 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-03 02:20:48 +00:00
Chris Lattner
82dcd5edd2 Allocate nodes for the scoped hash table from a recyling bump pointer 
allocator.  This speeds up early cse by about 20%


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122723 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-03 01:42:46 +00:00
Chris Lattner
d957c71791 reduce redundancy in the hashing code and other misc cleanups. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122720 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-03 01:10:08 +00:00
Chris Lattner
67678c8307 fix some pastos 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122718 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-02 23:29:58 +00:00
Chris Lattner
91139ccd99 add DEBUG and -stats output to earlycse. 
Teach it to CSE the rest of the non-side-effecting instructions.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122716 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-02 23:19:45 +00:00
Chris Lattner
cc9eab26b3 Enhance earlycse to do CSE of casts, instsimplify and die. 
Add a testcase.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122715 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-02 23:04:14 +00:00
Chris Lattner
12be936cc9 sketch out a new early cse pass. No functionality yet. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122713 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-02 21:47:05 +00:00