aae582ba99
Testcase for Revision 47478.
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llvm-svn: 47531
2008-02-23 10:59:51 +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
23fe6630e3
make this just a bit more strict.
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llvm-svn: 47274
2008-02-18 17:33:10 +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
c8ec470b52
upgrade this test.
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llvm-svn: 47257
2008-02-18 06:11:00 +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
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
2de8c2d41f
upgrade and simplify this test.
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llvm-svn: 47240
2008-02-17 20:48:43 +00:00
573b3f89e4
Remove any 'nest' parameter attributes if the function
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is not passed as an argument to a trampoline intrinsic.
llvm-svn: 47220
2008-02-16 20:56:04 +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
70e294660a
Fix PR2029
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llvm-svn: 47129
2008-02-14 19:18:13 +00:00
9592bb0390
Testcase for PR2032.
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llvm-svn: 47113
2008-02-14 07:15:11 +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
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
460648abde
Add a note pointing to PR1996.
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llvm-svn: 47055
2008-02-13 07:56:04 +00:00
03ec63f29d
Add test for PR1996. (This is my first time adding a test for a
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transform, so please review.)
llvm-svn: 47050
2008-02-13 06:55:57 +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
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
1a78ae76e4
Make this test more aggressive, to cover recent improvements.
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llvm-svn: 46695
2008-02-04 04:55:24 +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
56178bc6ad
Tag this test with the PR reference.
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llvm-svn: 46688
2008-02-03 16:35:19 +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
9aa789fda3
Don't drop function/call return attributes like 'nounwind'.
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llvm-svn: 46645
2008-02-01 20:37:16 +00:00
4e4b116750
Make DSE much more aggressive by performing DCE earlier. Update a testcase to reflect this increased aggressiveness.
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llvm-svn: 46542
2008-01-30 01:24:47 +00:00
b9e5b8fb9e
Fix a bug where scalarrepl would discard offset if type would match.
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In practice this can only happen on code with already undefined behavior,
but this is still a good thing to handle correctly.
llvm-svn: 46539
2008-01-30 00:39:15 +00:00
ade0abb498
Don't let globalopt hack on volatile loads or stores.
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llvm-svn: 46523
2008-01-29 19:01:37 +00:00
17819d971e
eliminate additions of 0.0 when they are obviously dead. This has to be careful to
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avoid turning -0.0 + 0.0 -> -0.0 which is incorrect.
llvm-svn: 46499
2008-01-29 06:52:45 +00:00
95bf1d4d7b
Add a testcase for eliminating memcpy's at the end of functions. Forgot to commit this with my last commit.
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llvm-svn: 46497
2008-01-29 06:40:32 +00:00
67fa0521b6
Filter loops that subtract induction variables.
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These loops are not yet handled.
Fix PR 1912.
llvm-svn: 46484
2008-01-29 02:20:41 +00:00
a116071547
this test is now compiled into the right thing.
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llvm-svn: 46454
2008-01-28 17:38:46 +00:00
8ea81e8ba4
Handle some more combinations of extend and icmp. Fixes PR1940.
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llvm-svn: 46431
2008-01-28 03:48:02 +00:00
710b441174
Fix PR1932 by disabling an xform invalid for fdiv.
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llvm-svn: 46429
2008-01-28 00:58:18 +00:00
1b706dd680
Fix PR1938 by forcing the code that uses an undefined value to branch one
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way or the other. Rewriting the code itself prevents subsequent analysis
passes from making contradictory conclusions about the code that could
cause an infeasible path to be made feasible.
llvm-svn: 46427
2008-01-28 00:32:30 +00:00
efb16f7057
Be more careful modifying the use_list while also iterating through it.
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llvm-svn: 46417
2008-01-27 18:35:00 +00:00
053c9871cd
Revert r46393: readonly/readnone functions are no
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longer allowed to write through byval arguments.
llvm-svn: 46416
2008-01-27 18:12:58 +00:00
8c491162d2
The CorrelatedExpressions pass is now no more.
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llvm-svn: 46409
2008-01-27 06:13:32 +00:00
fa1e7eef30
Fold fptrunc(add (fpextend x), (fpextend y)) -> add(x,y), as GCC does.
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llvm-svn: 46406
2008-01-27 05:29:54 +00:00
dc157a4f0a
Invert this test, because it is wrong if we allow
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readonly functions to use byval parameters as local
storage (how much do we want this?).
llvm-svn: 46399
2008-01-26 12:33:01 +00:00
6af19fd1e2
DeadStoreElimination can treat byval parameters as if there were alloca's for the purpose of removing end-of-function stores.
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llvm-svn: 46351
2008-01-25 10:10:33 +00:00
78712e5b59
Multiply can be evaluated in a different type, so long as the target type has
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a smaller bitwidth.
llvm-svn: 46244
2008-01-22 05:08:48 +00:00
9a93dc9565
Test case for varargs parameter attribute issue I just fixed.
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llvm-svn: 46127
2008-01-17 07:26:31 +00:00
5630c4f217
Fix arg promotion to propagate the correct attrs on the calls to
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promoted functions. This is important for varargs calls in
particular. Thanks to duncan for providing a great testcase.
llvm-svn: 46108
2008-01-17 01:17:03 +00:00
b3696e4f14
Do not strip llvm.used values.
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llvm-svn: 46045
2008-01-16 03:33:05 +00:00
f3e1155c41
add a test to ensure that argpromote of one argument doesn't
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break the byval attr on some other argument.
llvm-svn: 46025
2008-01-15 22:38:12 +00:00
b5ca2e9fcb
I noticed that the trampoline straightening transformation could
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drop attributes on varargs call arguments. Also, it could generate
invalid IR if the transformed call already had the 'nest' attribute
somewhere (this can never happen for code coming from llvm-gcc,
but it's a theoretical possibility). Fix both problems.
llvm-svn: 45973
2008-01-14 19:52:09 +00:00
26fe7ebc03
Fix the miscompilation of MiBench/consumer-lame that was exposed by Evan's
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byval work. This miscompilation is due to the program indexing an array out
of range and us doing a transformation that broke this.
llvm-svn: 45949
2008-01-14 02:09:12 +00:00
Zhou Sheng