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Author SHA1 Message Date
Dale Johannesen
34d7985927 One more transformation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60432 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 18:40:40 +00:00
Dale Johannesen
eccdd08d4c Make the code do what the comment says it does. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60431 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 18:40:09 +00:00
Chris Lattner
01c8e0233d Comment typeo fix, thanks Duncan! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60429 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 18:33:11 +00:00
Tilmann Scheller
b0a5cdd451 make it possible to custom lower TRUNCATE (needed for the CellSPU target) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60409 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 12:12:25 +00:00
Chris Lattner
c89c6a964c Implement PRE of loads in the GVN pass with a pretty cheap and 
straight-forward implementation.  This does not require any extra
alias analysis queries beyond what we already do for non-local loads.

Some programs really really like load PRE.  For example, SPASS triggers
this ~1000 times, ~300 times in 255.vortex, and ~1500 times on 403.gcc.

The biggest limitation to the implementation is that it does not split
critical edges.  This is a huge killer on many programs and should be
addressed after the initial patch is enabled by default.

The implementation of this should incidentally speed up rejection of 
non-local loads because it avoids creating the repl densemap in cases 
when it won't be used for fully redundant loads.

This is currently disabled by default.
Before I turn this on, I need to fix a couple of miscompilations in
the testsuite, look at compile time performance numbers, and look at
perf impact.  This is pretty close to ready though.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60408 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 08:16:11 +00:00
Nick Lewycky
48dd644109 Add a new SCEV representing signed division. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60407 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 08:05:48 +00:00
Mon P Wang
fb13f008cb Removed some unnecessary code in widening. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60406 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 07:35:08 +00:00
Chris Lattner
c7f7c1dc50 add a little helper function that does PHI translation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60405 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 07:16:45 +00:00
Chris Lattner
88d84b245c add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60404 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 06:32:34 +00:00
Bill Wendling
286a054908 Remove some errors that crept in. No functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60403 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 06:24:20 +00:00
Bill Wendling
d16c6e9993 Merge two if-statements into one. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60402 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 06:22:04 +00:00
Bill Wendling
29976b9e12 More styalistic changes. No functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60401 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 06:18:11 +00:00
Chris Lattner
b6bbe6320b add densemap range insertion method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60400 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 06:08:04 +00:00
Bill Wendling
3bdcda82a5 - Remove the buggy -X/C -> X/-C transform. This isn't valid when X isn't a 
constant. If X is a constant, then this is folded elsewhere.

- Added a note to Target/README.txt to indicate that we'd like to implement
  this when we're able.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60399 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 05:12:47 +00:00
Bill Wendling
a8bb13f989 Improve comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60398 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 05:09:00 +00:00
Bill Wendling
dda74e0702 - Reduce nesting. 
- No need to do a swap on a canonicalized pattern.

No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60397 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 05:06:43 +00:00
Chris Lattner
f8828eb41b some random comment improvements. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60395 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 04:52:26 +00:00
Owen Anderson
e209d9a3e6 Add a test for my previous PRE fix. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60394 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 04:25:42 +00:00
Owen Anderson
912c49d169 Fix an issue that Chris noticed, where local PRE was not properly instantiating 
a new value numbering set after splitting a critical edge.  This increases
the number of instances of PRE on 403.gcc from ~60 to ~570.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60393 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 04:09:22 +00:00
Evan Cheng
bbe4105cd7 Fix PR3124: overly strict assert. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60392 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 02:15:36 +00:00
Dale Johannesen
221cd2f081 Add a few more transformations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60391 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 01:30:54 +00:00
Bill Wendling
61edeb5ed2 Second stab at target-dependent lowering of everyone's favorite nodes: [SU]ADDO 
- LowerXADDO lowers [SU]ADDO into an ADD with an implicit EFLAGS define. The
  EFLAGS are fed into a SETCC node which has the conditional COND_O or COND_C,
  depending on the type of ADDO requested.

- LowerBRCOND now recognizes if it's coming from a SETCC node with COND_O or
  COND_C set.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60388 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 01:06:39 +00:00
Bill Wendling
9f24874f2e Reapply r60382. This time, don't mark "ADC" nodes with "implicit EFLAGS". 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60385 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-02 00:07:05 +00:00
Bill Wendling
e3b3c00454 Temporarily revert r60382. It caused CodeGen/X86/i2k.ll and others to fail. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60383 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 23:44:08 +00:00
Bill Wendling
a047bcacf2 - Have "ADD" instructions return an implicit EFLAGS. 
- Add support for seto, setno, setc, and setnc instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60382 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 23:30:42 +00:00
Bill Wendling
13d6d446f6 Expand getVTList, getNodeValueTypes, and SelectNodeTo to handle more value types. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60381 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 23:28:22 +00:00
Chris Lattner
ddc87d4a2c Add rdar reference, make this actually fail when the patch isn't applied. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60376 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 22:35:31 +00:00
Dale Johannesen
589bf0865c Consider only references to an IV within the loop when 
figuring out the base of the IV.  This produces better
code in the example.  (Addresses use (IV) instead of 
(BASE,IV) - a significant improvement on low-register
machines like x86).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60374 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 22:00:01 +00:00
Chris Lattner
c65fc3bd27 reenable array_pod_sort, this time hopefully happy on 64-bit 
and big endian systems.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60371 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 21:11:25 +00:00
Bill Wendling
57036da328 Don't rebuild RHSNeg. Just use the one that's already there. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60370 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 21:06:30 +00:00
Bill Wendling
69fffa5437 Document what this check is doing. Also, no need to cast to ConstantInt. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60369 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 21:03:43 +00:00
Bill Wendling
c25c68305c Use a simple comparison. Overflow on integer negation can only occur when the 
integer is "minint".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60366 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 19:46:27 +00:00
Chris Lattner
7b6113c6e2 don't #include <algorithm> into the llvm namespace. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60365 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 19:45:45 +00:00
Scott Michel
1a6cdb6b50 CellSPU: 
- Fix v2[if]64 vector insertion code before IBM files a bug report.
- Ensure that zero (0) offsets relative to $sp don't trip an assert
  (add $sp, 0 gets legalized to $sp alone, tripping an assert)
- Shuffle masks passed to SPUISD::SHUFB are now v16i8 or v4i32


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60358 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 17:56:02 +00:00
Chris Lattner
de5debfb58 switch to std::sort until I have time to sort this out. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60354 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 17:00:08 +00:00
Chris Lattner
0f41ad3bc9 cleanups suggested by duncan, thanks! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60353 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 16:55:19 +00:00
Chris Lattner
545fc87454 define array_pod_sort in terms of operator< instead of my brain 
damaged approximation.  This should fix it on big endian platforms
and on 64-bit.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60352 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 16:50:01 +00:00
Duncan Sands
aaffa05d0a There are no longer any places that require a 
MERGE_VALUES node with only one operand, so get
rid of special code that only existed to handle
that possibility.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60349 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 11:41:29 +00:00
Duncan Sands
1607f05cb7 Change the interface to the type legalization method 
ReplaceNodeResults: rather than returning a node which
must have the same number of results as the original
node (which means mucking around with MERGE_VALUES,
and which is also easy to get wrong since SelectionDAG
folding may mean you don't get the node you expect),
return the results in a vector.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60348 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 11:39:25 +00:00
Bill Wendling
d54d86038d Generalize the FoldOrWithConstant method to fold for any two constants which 
don't have overlapping bits.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60344 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 08:32:40 +00:00
Bill Wendling
a698a472f2 Reduce copy-and-paste code by splitting out the code into its own function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60343 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 08:23:25 +00:00
Bill Wendling
03aae5f7e1 Use m_Specific() instead of double matching. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60341 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 08:09:47 +00:00
Bill Wendling
9c531a0f07 Move pattern check outside of the if-then statement. This prevents us from fiddling with constants unless we have to. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60340 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 07:47:02 +00:00
Chris Lattner
d0f5bfc9be Rename some variables, only increment BI once at the start of the loop instead of throughout it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60339 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 07:35:54 +00:00
Chris Lattner
09713794c1 pull the predMap densemap out of the inner loop of performPRE, so 
that it isn't reallocated all the time.  This is a tiny speedup for
GVN: 3.90->3.88s


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60338 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 07:29:03 +00:00
Chris Lattner
a3522000ab switch a couple more calls to use array_pod_sort. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60337 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 06:52:57 +00:00
Chris Lattner
4329c42840 don't assume iterators implicitly convert to pointers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60336 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 06:50:46 +00:00
Chris Lattner
99d0015735 Introduce a new array_pod_sort function and switch LSR to use it 
instead of std::sort.  This shrinks the release-asserts LSR.o file
by 1100 bytes of code on my system.

We should start using array_pod_sort where possible.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60335 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 06:49:59 +00:00
Chris Lattner
09fb7dadf1 Eliminate use of setvector for the DeadInsts set, just use a smallvector. 
This is a lot cheaper and conceptually simpler.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60332 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 06:27:41 +00:00
Chris Lattner
a68d4ca73e DeleteTriviallyDeadInstructions is always passed the 
DeadInsts ivar, just use it directly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60330 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 06:14:28 +00:00