3aab10b932
Add minimal support for disambiguating memory references. Currently
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the main thing this covers is spills to distinct spill slots.
llvm-svn: 60517
2008-12-04 01:35:46 +00:00
84efaf6a63
Rewrite the liveness bookkeeping code to fix a bunch of
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issues with subreg operands and tied operands.
llvm-svn: 60510
2008-12-03 23:07:27 +00:00
ee1cd1781a
Have PseudoSourceValue override Value::dump, so that it works
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on PseudoSourceValue values. This also fixes a FIXME in
lib/VMCode/AsmWriter.cpp.
llvm-svn: 60507
2008-12-03 21:37:21 +00:00
0c91a5f56c
Fix an inconsistency in a comment.
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llvm-svn: 60500
2008-12-03 19:38:38 +00:00
434a3ca8e9
Don't charge the full latency for anti and output dependencies. This is
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an area where eventually it would be good to use target-dependent
information.
llvm-svn: 60498
2008-12-03 19:37:34 +00:00
444baea236
When looking for anti-dependences on the critical path, don't bother
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examining non-anti-dependence edges.
llvm-svn: 60496
2008-12-03 19:32:26 +00:00
1a32dda4aa
Add a comment about callee-saved registers.
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llvm-svn: 60495
2008-12-03 19:30:13 +00:00
3f86b51333
Split foldMemoryOperand into public non-virtual and protected virtual
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parts, and add target-independent code to add/preserve
MachineMemOperands.
llvm-svn: 60488
2008-12-03 18:43:12 +00:00
69cc2cbbff
Rename isSimpleLoad to canFoldAsLoad, to better reflect its meaning.
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llvm-svn: 60487
2008-12-03 18:15:48 +00:00
f52e518d05
Only check that the result of the mapping was not
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a new node if the node was actually remapped.
llvm-svn: 60482
2008-12-03 12:36:16 +00:00
cda011b5ad
Fix bug 3140.
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Print a single parameter .file directive if we have an ELF target.
llvm-svn: 60480
2008-12-03 11:01:37 +00:00
ae3ba45eb2
Add a sanity-check to tablegen to catch the case where isSimpleLoad
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is set but mayLoad is not set. Fix all the problems this turned up.
Change code to not use isSimpleLoad instead of mayLoad unless it
really wants isSimpleLoad.
llvm-svn: 60459
2008-12-03 02:30:17 +00:00
e62150cae4
Remove a (what appears to be) overly strict assertion. Here is what happened:
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1. ppcf128 select is expanded to f64 select's.
2. f64 select operand 0 is an i1 truncate, it's promoted to i32 zero_extend.
3. f64 select is updated. It's changed back to a "NewNode" and being re-analyzed.
4. f64 select operands are being processed. Operand 0 is a "NewNode". It's being expunged out of ReplacedValues map.
5. ExpungeNode tries to remap f64 select and notice it's a "NewNode" and assert.
Duncan, please take a look. Thanks.
llvm-svn: 60443
2008-12-02 21:57:09 +00:00
9b0b28e021
Non-functional change: make custom lowering for truncate stylistically
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consistent with the way it's generally done in other places.
llvm-svn: 60439
2008-12-02 19:55:08 +00:00
7e9daef644
Fix a typo in a comment.
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llvm-svn: 60434
2008-12-02 19:27:20 +00:00
ecd5b5f2b2
Add support for folding spills into preceding defs when doing pre-alloc splitting.
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llvm-svn: 60433
2008-12-02 18:53:47 +00:00
54bdec238a
One more transformation.
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llvm-svn: 60432
2008-12-02 18:40:40 +00:00
318ccb0e62
make it possible to custom lower TRUNCATE (needed for the CellSPU target)
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llvm-svn: 60409
2008-12-02 12:12:25 +00:00
6e1c6ad127
Removed some unnecessary code in widening.
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llvm-svn: 60406
2008-12-02 07:35:08 +00:00
1718fd4375
Fix PR3124: overly strict assert.
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llvm-svn: 60392
2008-12-02 02:15:36 +00:00
8c76670b5a
Add a few more transformations.
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llvm-svn: 60391
2008-12-02 01:30:54 +00:00
2d59863d06
Expand getVTList, getNodeValueTypes, and SelectNodeTo to handle more value types.
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llvm-svn: 60381
2008-12-01 23:28:22 +00:00
3d960941b1
There are no longer any places that require a
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MERGE_VALUES node with only one operand, so get
rid of special code that only existed to handle
that possibility.
llvm-svn: 60349
2008-12-01 11:41:29 +00:00
6ed40141f7
Change the interface to the type legalization method
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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.
llvm-svn: 60348
2008-12-01 11:39:25 +00:00
c8228d263b
Followup to r60283: optimize arbitrary width signed divisions as well
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as unsigned divisions. Same caveats as before.
llvm-svn: 60284
2008-11-30 06:35:39 +00:00
1b7fc154a5
Fix for PR2164: allow transforming arbitrary-width unsigned divides into
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multiplies.
Some more cleverness would be nice, though. It would be nice if we
could do this transformation on illegal types. Also, we would
prefer a narrower constant when possible so that we can use a narrower
multiply, which can be cheaper.
llvm-svn: 60283
2008-11-30 06:02:26 +00:00
bd0f57821a
APIntify a test which is potentially unsafe otherwise, and fix the
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nearby FIXME.
I'm not sure what the right way to fix the Cell test was; if the
approach I used isn't okay, please let me know.
llvm-svn: 60277
2008-11-30 04:59:26 +00:00
2c96bdd8d6
Silence a warning.
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Despite changing the order of evaluation, this doesn't actually change the
meaning of the statement.
llvm-svn: 60177
2008-11-27 17:29:52 +00:00
7ae1a84465
Removing redundant semicolons. No functionality change.
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llvm-svn: 60149
2008-11-27 05:58:04 +00:00
3761143755
Avoid inserting noop's in the middle of a loop.
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llvm-svn: 60141
2008-11-27 01:16:00 +00:00
73bc0ba4c9
Add a missing case in visitADD.
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llvm-svn: 60137
2008-11-27 00:43:21 +00:00
80810f8c6b
Allow custom lowering of ADDE/ADDC/SUBE/SUBC operations.
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llvm-svn: 60102
2008-11-26 11:19:00 +00:00
3336b1f06b
LiveRanges are represented as half-open ranges. Fix the findLiveInMBBs code
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and the LiveInterval.h top-level comment and accordingly. This fixes blocks
having spurious live-in registers in boundary cases.
llvm-svn: 60092
2008-11-26 05:50:31 +00:00
b4ff5322c1
A simplification for checking whether the signs of the operands and sum differ. Thanks, Duncan.
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llvm-svn: 60043
2008-11-25 19:40:17 +00:00
bb1298e6d4
Suppress warnings.
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llvm-svn: 60041
2008-11-25 18:53:54 +00:00
bf592fccd4
Now with the correct type for the 0.
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llvm-svn: 60016
2008-11-25 08:19:22 +00:00
d06c625b95
Get rid of unused variable.
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llvm-svn: 60015
2008-11-25 08:13:20 +00:00
4498b47677
Hacker's Delight says, "Signed integer overflow of addition occurs if and only
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if the operands have the same sign and the sum has sign opposite to that of the
operands."
llvm-svn: 60014
2008-11-25 08:12:19 +00:00
ad2134d45d
Initial support for anti-dependence breaking. Currently this code does not
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introduce any new spilling; it just uses unused registers.
Refactor the SUnit topological sort code out of the RRList scheduler and
make use of it to help with the post-pass scheduler.
llvm-svn: 59999
2008-11-25 00:52:40 +00:00
66835479d7
- Make lowering of "add with overflow" customizable by back-ends.
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- Mark "add with overflow" as having a custom lowering for X86. Give it a null
lowering representation for now.
llvm-svn: 59971
2008-11-24 19:21:46 +00:00
5cc12a8e31
Check in the rest of this change. The isAntiDep flag needs to be passed
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to removePred because an SUnit can both data-depend and anti-depend
on the same SUnit.
llvm-svn: 59969
2008-11-24 17:33:52 +00:00
d2b10368ed
Pass the isAntiDep argument.
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llvm-svn: 59968
2008-11-24 17:24:27 +00:00
11e4be3717
Run post-RA scheduling after branch folding, as it tends to
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obscure tail-merging opportunities.
llvm-svn: 59967
2008-11-24 17:22:52 +00:00
1dc8363d95
Minor fix debug for register allocation debug output.
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llvm-svn: 59961
2008-11-24 16:01:21 +00:00
dc2dac181a
If the type legalizer actually legalized anything
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(this doesn't happen that often, since most code
does not use illegal types) then follow it by a
DAG combiner run that is allowed to generate
illegal operations but not illegal types. I didn't
modify the target combiner code to distinguish like
this between illegal operations and illegal types,
so it will not produce illegal operations as well
as not producing illegal types.
llvm-svn: 59960
2008-11-24 14:53:14 +00:00
a8fd1f2c8e
Eliminate some unused variable compile time warnings.
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llvm-svn: 59952
2008-11-24 07:09:49 +00:00
2278f8f5e1
Add support for llvm.uadd.with.overflow.
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llvm-svn: 59926
2008-11-24 01:38:29 +00:00
8d6e2e13d5
Rename SetCCResultContents to BooleanContents. In
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practice these booleans are mostly produced by SetCC,
however the concept is more general.
llvm-svn: 59911
2008-11-23 15:47:28 +00:00
2967480f54
Added check to avoid generating extract subvector beyond the end of the vector when normalizing vector shuffles.
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llvm-svn: 59900
2008-11-23 04:35:05 +00:00
bff4b37af5
Make a convenient helper for printing offsets.
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llvm-svn: 59872
2008-11-22 16:15:34 +00:00
Dan Gohman