09f410b6d7
Split ParameterAttributes.h, putting the complicated
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stuff into ParamAttrsList.h. Per feedback from
ParamAttrs changes.
llvm-svn: 47504
2008-02-22 22:17:59 +00:00
3b8eb704fc
Fixed a typo.
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llvm-svn: 47478
2008-02-22 10:00:35 +00:00
360c86aed5
Add explicit keywords.
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llvm-svn: 47382
2008-02-20 16:44:09 +00:00
18991d78fa
Fix newly-introduced 4.3 warnings
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llvm-svn: 47375
2008-02-20 12:07:57 +00:00
1bfd121321
Make Transforms to be 4.3 warnings-clean
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llvm-svn: 47371
2008-02-20 11:26:25 +00:00
579f07135a
Unbreak build with gcc 4.3: provide missed includes and silence most annoying warnings.
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llvm-svn: 47367
2008-02-20 11:08:44 +00:00
b4724dbda2
When performing return slot optimization, remember to inform memdep when we're removing the memcpy.
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llvm-svn: 47364
2008-02-20 08:23:02 +00:00
89268bc6e2
Expand ParameterAttributes to 32 bits (in preparation
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for adding alignment info, not there yet). Clean up
interfaces to reference ParameterAttributes consistently.
llvm-svn: 47342
2008-02-19 21:38:47 +00:00
032fb2eda9
remove the lower packed pass. It can never work and even the parts that
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could work don't work fully. This fixes PR1705. Oh yeah, we don't have
packed types anymore either ;-)
llvm-svn: 47322
2008-02-19 07:39:17 +00:00
e92e303582
Refactor this method a bit, and correct a test that was completely wrong but happened to work out anyways. :-)
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llvm-svn: 47321
2008-02-19 07:07:51 +00:00
f7b7ba9c5a
isa+cast -> dyncast.
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llvm-svn: 47320
2008-02-19 06:53:20 +00:00
c130e3afc4
simplify this code again, try 2 :)
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llvm-svn: 47319
2008-02-19 06:52:38 +00:00
e71d6e37b2
Fix a comment.
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llvm-svn: 47318
2008-02-19 06:51:23 +00:00
806cbde53b
Major improvements to yesterday's return slot optimization. Remove some unneccessary constraints,
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and add some others that should have been in from the first place. Document the whole thing better.
llvm-svn: 47315
2008-02-19 06:35:43 +00:00
0fe6bce9ce
fdiv/frem of undef can produce undef, because the undef operand
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can be a SNaN. We could be more aggressive and turn this into
unreachable, but that is less nice, and not really worth it.
llvm-svn: 47313
2008-02-19 06:12:18 +00:00
c0c3cd8e27
Factor the profitability check for return slot optimization out into a static function.
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At some point in the future, this check will become smarter.
llvm-svn: 47310
2008-02-19 03:27:34 +00:00
551b8eeb5c
An sret parameter is required to be the first parameter, so there's no need to loop
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over all the parameters of the callee looking for it.
llvm-svn: 47309
2008-02-19 03:15:29 +00:00
336824f102
Cleanup some of my patches from yesterday. Refactor the check for which xform
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to apply to a memcpy into processInstruction. Also, fix a bug in the check due to
missing braces.
llvm-svn: 47307
2008-02-19 03:09:45 +00:00
ffca8e99b2
Fix Transforms/GVN/memcpy.ll, which Chris broke in r47275 by reordering the branches. memcpy's are a kind of CallInst.
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llvm-svn: 47305
2008-02-19 02:53:23 +00:00
fefd0202c9
Correctly fold divide-by-constant, even when faced with overflow.
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llvm-svn: 47287
2008-02-18 22:48:05 +00:00
1e3c501cb8
Transforming -A + -B --> -(A + B) isn't safe for FP, thanks
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to Dale for noticing this!
llvm-svn: 47276
2008-02-18 17:50:16 +00:00
0af5601028
minor code simplification, no functionality change.
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llvm-svn: 47275
2008-02-18 17:47:29 +00:00
3549553262
Add support to GVN for performing sret return slot optimization. This means that, if an sret function tail calls
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another sret function, it should pass its own sret parameter to the tail callee, allowing it to fill in the correct
return value. llvm-gcc does not emit this by default. Instead, it allocates space in the caller for the sret of
the tail call and then uses memcpy to copy the result into the caller's sret parameter. This optimization detects
and optimizes that case.
llvm-svn: 47265
2008-02-18 09:24:53 +00:00
024f8c8f09
optimize away stackrestore calls that have no intervening alloca or call.
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llvm-svn: 47258
2008-02-18 06:12:38 +00:00
0e7fd2f1a8
simplify some code, BreakUpSubtract always returns nonnull now.
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llvm-svn: 47251
2008-02-18 02:18:25 +00:00
cc22601bc3
Fold (-x + -y) -> -(x+y) which promotes better association, fixing
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the second half of PR2047
llvm-svn: 47244
2008-02-17 21:03:36 +00:00
5f08ec854f
fix pasto
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llvm-svn: 47242
2008-02-17 20:54:40 +00:00
a70d138457
Split up subtracts into add+negate if they have a reassociable use or operand
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that is also a subtract. This implements PR2047 and Transforms/Reassociate/subtest2.ll
llvm-svn: 47241
2008-02-17 20:51:26 +00:00
902537cd8d
make the logic for breaking up subtracts more explicit, no
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functionality change.
llvm-svn: 47239
2008-02-17 20:44:51 +00:00
a42c3147cc
Fix PR2028
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llvm-svn: 47150
2008-02-15 01:24:49 +00:00
2e622e4c2b
If loop header is also loop exiting block then OrigPN is incoming value for B loop header.
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Fixes PR 2030.
llvm-svn: 47141
2008-02-14 23:18:47 +00:00
89acd61805
simplify code, no functionality change.
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llvm-svn: 47116
2008-02-14 07:39:01 +00:00
7c77e2bc65
Fix PR2032. Inform the alias analysis of changes to the underlying program.
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llvm-svn: 47111
2008-02-14 07:11:24 +00:00
0ecb76d820
A loop latch phi node may have uses inside loop, not just in loop header.
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llvm-svn: 47093
2008-02-13 22:23:07 +00:00
1ee8dc97d9
Rename APInt's isPositive to isNonNegative, to reflect what it
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actually does.
llvm-svn: 47090
2008-02-13 22:09:18 +00:00
22c3caab6e
While moving exit condition, do not drop loop latch on the floor.
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llvm-svn: 47089
2008-02-13 22:06:36 +00:00
c281d8031b
Keep track of exit value operand number when operands are swapped.
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llvm-svn: 47082
2008-02-13 19:48:48 +00:00
00dba4f734
Re-apply the patch to improve the optimizations of memcpy's, with several
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bugs fixed. This now passes PPC bootstrap.
llvm-svn: 47026
2008-02-12 21:15:18 +00:00
716c10c01e
Fix for bug 1996: optimize out loads of undef. This code basically just
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checks for a malloc/alloca immediately followed by a load.
llvm-svn: 47006
2008-02-12 12:08:14 +00:00
dcddd64424
Fix scalarrepl to not 'miscompile' undefined code, part #2 .
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This fixes the store case, my previous patch just fixed the load
case. rdar://5707076.
llvm-svn: 46932
2008-02-10 19:05:37 +00:00
26f75e2576
Fix PR 1995.
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llvm-svn: 46898
2008-02-08 22:49:13 +00:00
c676a0329c
Temporarily reverting:
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http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20080128/057882.html
This is causing a miscompilation on PPC G5 and just now seeing it on iMac x86-64.
llvm-svn: 46822
2008-02-06 20:03:07 +00:00
682a7dc653
Fix a bug compiling PR1978 (perhaps not the only one though) which
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was incorrectly simplifying "x == (gep x, 1, i)" into false, even
though i could be negative. As it turns out, all the code to
handle this already existed, we just need to disable the incorrect
optimization case and let the general case handle it.
llvm-svn: 46739
2008-02-05 04:45:32 +00:00
a82c9931f4
Be more precise when eliminating pointers bue to memcpy's. This allows more
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stores to be deleted in some cases.
llvm-svn: 46694
2008-02-04 04:53:00 +00:00
c4a7c41869
Allow GVN to hack on memcpy's, making them open to further optimization.
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llvm-svn: 46693
2008-02-04 02:59:58 +00:00
3b59214320
There are some cases where icmp(add) can be folded into a new icmp. Handle them.
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llvm-svn: 46687
2008-02-03 16:33:09 +00:00
c7a4ba044b
Hack on vectors too.
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llvm-svn: 46684
2008-02-03 08:19:11 +00:00
e6e3a7f6ea
Fold away one multiply in instcombine. This would normally be caught in
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reassociate anyways, but they could be generated during instcombine's run.
llvm-svn: 46683
2008-02-03 07:42:09 +00:00
6b016703a9
Remove a couple more cases of "getNumUses() == 0". No need to walk the linked
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list just to see if whether the list is empty.
llvm-svn: 46555
2008-01-30 08:01:28 +00:00
625e89c8b0
Use empty() instead of comparing size() with zero.
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llvm-svn: 46554
2008-01-30 07:54:16 +00:00
Dale Johannesen