Nick Lewycky
3ac9e109b2
Enhance analysis of srem.
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Remove dead code analyzing urem. 'urem' of power-of-2 is canonicalized to an
'and' instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53506 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-12 05:04:38 +00:00
Nick Lewycky
4bf1e59819
Add another optimization from PR2330. Also catch some missing cases that are
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similar.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53451 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-11 07:20:53 +00:00
Chris Lattner
85b5eb0505
Fix folding of icmp's of i1 where the comparison is signed. The code
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was using the algorithm for folding unsigned comparisons which is
completely wrong. This has been broken since the signless types change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53444 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-11 04:20:58 +00:00
Chris Lattner
f299184565
Fix a bogus optimization: folding (slt (zext i1 A to i32), 1) -> (slt i1 A, true)
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This cause a regression in InstCombine/JavaCompare, which was doing the right
thing on accident. To handle the missed case, generalize the comparisons based
on masked bits a little bit to handle comparisons against the max value. For
example, we can now xform (slt i32 (and X, 4), 4) -> (setne i32 (and X, 4), 4)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53443 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-11 04:09:09 +00:00
Chris Lattner
99672cb130
make this condition more precise.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53442 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-11 03:54:57 +00:00
Matthijs Kooijman
d16918f843
Restructure dead argument elimination, try #3 :-)
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Rewrite the DeadArgumentElimination pass, to use a more explicit tracking of
dependencies between return values and/or arguments. Also make the handling of
arguments and return values the same.
The pass now looks properly inside returned structs, but only at the first
level (ie, not inside nested structs).
This version fixed a few more bugs and was cleaned up a bit. It now passes all
of LLVM's testing, and should still pass SPEC2006. There is still a minor bug
with regard to returning nested structs. Since there is currently nothing that
emits such IR, I will fix that in a seperate commit (partly because it requires
a non-trivial fix).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53400 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-10 10:24:08 +00:00
Nick Lewycky
5dcc41f5b3
Fix overzealous optimization. Thanks to Duncan Sands for pointing out my error!
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53393 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-10 05:51:40 +00:00
Chris Lattner
fea85c46c0
Fix a case where vector comparison constant folding would cause an
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infinite recursion. part of PR2529
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53383 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-10 00:29:28 +00:00
Chris Lattner
330e7e4d25
elementwise comparison of vector constants was completely wrong. Fix
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it for PR2529
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53380 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-10 00:08:17 +00:00
Nick Lewycky
9ee863ecc0
Fold (a < 8) && (b < 8) into (a|b) < 8 for unsigned less or greater than.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53282 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-09 07:29:11 +00:00
Nick Lewycky
d1f77bf931
Fold ((1 << a) & 1) to (a == 0).
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53276 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-09 05:20:13 +00:00
Chris Lattner
2782ed1f14
Fix a broken test. Neither load is eliminable without changing the CFG.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53273 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-09 05:01:02 +00:00
Nick Lewycky
b4d1bc989e
Reduce x - y to -y when we know the 'x' part will get masked off anyways.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53271 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-09 04:32:37 +00:00
Devang Patel
a5e27f8028
If loop induction variable's start value is less then its exit value then do not split the loop.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53265 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-09 00:12:01 +00:00
Chris Lattner
d038c27516
'Optimize' test
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53242 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-08 18:33:33 +00:00
Chris Lattner
895860e27b
new testcase for PR2496
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53239 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-08 17:18:05 +00:00
Chris Lattner
155a490258
Fix three bugs:
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1) evaluate [v]fcmp true/false with undefs to true or false instead
of undef.
2) fix vector comparisons with undef to return a vector result instead
of i1
3) fix vector comparisons with evaluatable results to return vector
true/false instead of i1 true/false (PR2529)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53220 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-08 05:46:34 +00:00
Nick Lewycky
b8cd6a49b5
Fix missed optimization opportunity when analyzing cast of mul and select.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53151 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-05 21:19:34 +00:00
Owen Anderson
9da02b844f
Remove the ability for ADCE to remove unreachable blocks in loop nests, because, as Eli pointed out, SimplifyCFG already does this.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53104 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-03 17:21:41 +00:00
Owen Anderson
77d76b7ef7
Add support to ADCE for pruning unreachable blocks. This addresses the final
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part of PR2509.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53038 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-02 18:05:19 +00:00
Owen Anderson
f2aa160b35
A better fix for PR2503 that doesn't pessimize GVN in the presence of unreachable blocks.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53032 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-02 17:20:16 +00:00
Evan Cheng
a7e4cc9263
XFAIL for now.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52795 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-26 22:09:29 +00:00
Owen Anderson
3987f8e1ac
Use the -enable-pre flag so this test doesn't fail.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52784 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-26 17:03:28 +00:00
Chris Lattner
aa0bf52625
Fix PR2488, a case where we deleted stack restores too aggressively.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52702 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-25 05:59:28 +00:00
Dan Gohman
8dbe7f832e
Revert 52645, the loop unroller changes. It caused a regression in 252.eon.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52688 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-24 20:44:42 +00:00
Matthijs Kooijman
1d9a277761
Commit the new DeadArgElim pass again, this time with the gcc bootstrap failures fixed.
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Also add a testcase to reproduce the gcc bootstrap failure in very much reduced form.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52677 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-24 16:30:26 +00:00
Dan Gohman
55e283c71e
Revamp the loop unroller, extending it to correctly update PHI nodes
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in the presence of out-of-loop users of in-loop values and the trip
count is not a known multiple of the unroll count, and to be a bit
simpler overall. This fixes PR2253.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52645 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-23 21:29:41 +00:00
Dan Gohman
cbfe5bbe88
Improve LSR's dead-phi detection to handle use-def cycles
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with more than two nodes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52617 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-22 20:44:02 +00:00
Chris Lattner
963a97f1a3
Fix PR2369 by making scalarrepl more careful about promoting
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structures. Its default threshold is to promote things that are
smaller than 128 bytes, which is sane. However, it is not sane
to do this for things that turn into 128 *registers*. Add a cap
on the number of registers introduced, defaulting to 128/4=32.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52611 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-22 17:46:21 +00:00
Eli Friedman
5c1f172213
Fix for PR2479: correctly optimize expressions like (a > 13) & (a ==
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15).
See also PR1800, which is about the signed case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52608 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-21 23:36:13 +00:00
Duncan Sands
befc9c16fa
This file is empty.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52596 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-21 20:26:50 +00:00
Evan Cheng
9f99b7c595
Back out Matthijs' DAE patches. It's miscompiling gcc driver.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52570 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-21 00:31:44 +00:00
Matthijs Kooijman
63691f13b6
Add testcase that checks that DeadArgElim doesn't touch stuff it shouldn't touch.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52540 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-20 15:38:22 +00:00
Matthijs Kooijman
c95e44b4e0
Recommit r52459, rewriting of the dead argument elimination pass.
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This is a fixed version that no longer uses multimap::equal_range, which
resulted in a pointer invalidation problem.
Also, DAE::InspectedFunctions was not really necessary, so it got removed.
Lastly, this version no longer applies the extra arg hack on functions who did
not have any arguments to start with.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52532 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-20 09:36:16 +00:00
Chris Lattner
2de3fec61c
Fix PR2471, which is a bug involving an invalid promotion from a conditional load.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52525 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-20 05:12:56 +00:00
Matthijs Kooijman
3d2ff5f939
Modify some ipconstprop tests to also test with invokes.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52491 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-19 09:27:44 +00:00
Owen Anderson
93d606a9b3
Remove this test until the corresponding patch is reapplied because it's causing make check to crash for some people.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52473 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 22:37:31 +00:00
Owen Anderson
b230372437
Add local PRE to GVN. This only operates in cases where it would not increase code size, namely when the instantiated expression
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would only need to be created in one predecessor.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52471 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 21:41:49 +00:00
Matthijs Kooijman
ca85d65277
Rewrite the DeadArgumentElimination pass, to use a more explicit tracking of
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dependencies between return values and/or arguments. Also make the handling of
arguments and return values the same.
The pass now looks properly inside returned structs, but only at the first
level (ie, not inside nested structs).
Also add a testcase for testing various variations of (multiple) dead rerturn
values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52459 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 11:12:53 +00:00
Matthijs Kooijman
c2afe89019
Reapply r52397 (make IPConstProp promote returned arguments), but fixed this
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time. Sorry for the trouble!
This time, also add a testcase, which I should have done in the first place...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52455 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 08:30:37 +00:00
Matthijs Kooijman
8b0fcf38ef
Reapply r52396, it was unrelated to the breakage (that was caused by r52397, my
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commit after this).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52453 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 08:09:27 +00:00
Chris Lattner
0521e3cdc1
implement some simple bswap optimizations, rdar://5992453
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52442 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 04:33:20 +00:00
Chris Lattner
a2eec61607
temporarily revert this testcase since its patch was reverted.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52441 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 04:03:23 +00:00
Chris Lattner
8114b718c9
make truncate/sext elimination capable of changing phi's. This
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implements rdar://6013816 and the testcase in Transforms/InstCombine/sext-misc.ll.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52440 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 04:00:49 +00:00
Devang Patel
64cd658223
Preserve dominance frontier while trivially unswitching loop.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52438 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-18 02:16:38 +00:00
Matthijs Kooijman
906e423724
Learn IPConstProp to look at individual return values and propagate them
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individually.
Also learn IPConstProp how returning first class aggregates work, in addition
to old style multiple return instructions.
Modify the return-constants testscase to confirm this behaviour.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52396 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 12:02:52 +00:00
Dan Gohman
9b93dd1f1a
Refine the change in r52258 for avoiding use-before-def conditions
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when changing the stride of a comparison so that it's slightly
more precise, by having it scan the instruction list to determine
if there is a use of the condition after the point where the
condition will be inserted.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52371 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16 22:34:15 +00:00
Matthijs Kooijman
d47e6aeb93
Make testcase check for extractvalue instead of extractelement.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52317 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16 13:03:44 +00:00
Matthijs Kooijman
cdbada613e
Store the result of multiple identical run lines in a temporary file.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52314 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16 12:21:25 +00:00
Wojciech Matyjewicz
8a08769bad
Fix PR2434. When scanning for exising binary operator to reuse don't
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take into account the instrucion pointed by InsertPt. Thanks to it,
returning the new value of InsertPt to the InsertBinop() caller can be
avoided. The bug was, actually, in visitAddRecExpr() method which wasn't
correctly handling changes of InsertPt. There shouldn't be any
performance regression, as -gvn pass (run after -indvars) removes any
redundant binops.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52291 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-15 19:07:39 +00:00
Eli Friedman
6100119620
Remove unnecessary target lines.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52261 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-13 22:12:16 +00:00
Eli Friedman
6783cdcbd2
Remove unnecessary target lines.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52260 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-13 22:10:32 +00:00
Eli Friedman
6903a24f32
Don't skip over instructions other than loads that might read memory
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when trying to sink stores.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52259 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-13 22:02:12 +00:00
Dan Gohman
e562b1725e
Protect ChangeCompareStride from situations in which it is possible
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for it to generate use-before-def IR, such as in this testcase.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52258 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-13 21:43:41 +00:00
Eli Friedman
66fe80aa57
Make sure SimplifyStoreAtEndOfBlock doesn't mess with loops; the
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structure checks are incorrect if the blocks aren't distinct.
Fixes PR2435.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52257 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-13 21:17:49 +00:00
Evan Cheng
933b5065e5
Fix some tests.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52245 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-12 21:23:38 +00:00
Evan Cheng
0d0ca8572f
Revert 52223.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52243 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-12 20:55:39 +00:00
Matthijs Kooijman
ca9bcb0fda
Add line continuation character so the avoid dup loop header test actually runs.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52228 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-12 08:49:04 +00:00
Evan Cheng
bb318c073e
Avoid duplicating loop header which leads to unnatural loops (and just seem like general badness to me, likely to cause code explosion).
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Patch by Florian Brandner.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52223 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-11 19:07:54 +00:00
Matthijs Kooijman
a9012eca1a
Teach instruction combining about the extractvalue. It can succesfully fold
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useless insert-extract chains, similar to how it folds them for vectors.
Add a testcase for this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52217 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-11 14:05:05 +00:00
Matthijs Kooijman
61d858e3f0
Ignore stderr for some more tests that expect warnings there.
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This fixes 2 testcases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52184 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-10 16:13:38 +00:00
Matthijs Kooijman
888fa33cfb
Fix some escaping and quoting in RUN lines, mainly involving { and <. In two
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cases quoting of <{ didn't work out, so I changed the grep to check for }>
instead.
This fixes 7 testcases that were not properly running before.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52182 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-10 16:04:47 +00:00
Matthijs Kooijman
7361f63b25
Let some more tests ignore expected output on stderr.
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Also, use > %t instead of -o %t for output in one test since that also works
when %t already exists.
This fixes 6 testcases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52178 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-10 15:04:14 +00:00
Dan Gohman
9eb698b96d
Fix two more not-grep tests that were missing llvm-dis.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52159 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-09 22:36:45 +00:00
Duncan Sands
eddc8f1f8b
Test that prune-eh doesn't make deductions based
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on bodies of functions with weak linkage.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52141 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-09 11:28:41 +00:00
Chris Lattner
313f0e63f7
lower calls to abs to inline code, PR2337
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52138 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-09 08:26:51 +00:00
Chris Lattner
18d73c206e
Fix PR2411, where ip constant prop would propagate the
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result of a weak function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52137 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-09 07:58:07 +00:00
Chris Lattner
7d8ab4efbc
Limit the icmp+phi merging optimization to the cases where it is profitable:
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don't make i1 phis when it won't be possible to eliminate them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52097 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-08 20:52:11 +00:00
Evan Cheng
4d09efd7b8
Speculatively execute a block when the the block is the then part of a triangle shape and it contains a single, side effect free, cheap instruction. The branch is eliminated by adding a select instruction. i.e.
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Turn
BB:
%t1 = icmp
br i1 %t1, label %BB1, label %BB2
BB1:
%t3 = add %t2, c
br label BB2
BB2:
=>
BB:
%t1 = icmp
%t4 = add %t2, c
%t3 = select i1 %t1, %t2, %t3
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52073 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-07 08:52:29 +00:00
Evan Cheng
cce302fded
Fix run line.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52072 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-07 08:40:16 +00:00
Zhou Sheng
b73afcf6dc
Add a test case for opt -instcombine bug fix in revision 52003.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52004 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-05 14:25:11 +00:00
Matthijs Kooijman
02518140ac
Learn ScalarReplAggregrates how stores and loads of first class aggregrates
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work and how to replace them into individual values. Also, when trying to
replace an aggregrate that is used by load or store with a single (large)
integer, don't crash (but don't replace the aggregrate either).
Also adds a testcase for both structs and arrays.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51997 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-05 12:51:53 +00:00
Matthijs Kooijman
47c6fd7317
Let StructRetPromotion check if all if its users are really calls or invokesn,
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not other instructions. This fixes a crash with the added testcase.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51992 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-05 08:57:20 +00:00
Matthijs Kooijman
257da0a7fc
Let StructRetPromotion check if it's users are really calling it and not
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passing its pointer. Fixes test with added testcase.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51991 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-05 08:48:32 +00:00
Owen Anderson
3637981050
Testcase for LoopIndexSplit and DomFrontier.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51916 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-03 18:32:27 +00:00
Devang Patel
2f170997b5
Update dom tree. Fix PR 2372.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51887 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-02 22:52:56 +00:00
Owen Anderson
009e4f7609
Fix two issues that Eli Friedman pointed out, where would misoptimized code like:
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char a[200];
init(a, a+200);
OR
int a[200];
char* b = (char*)a;
char* c = (char*)a;
foo(b, c);
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51850 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-01 22:26:26 +00:00
Owen Anderson
19d4d12ee0
Test for PR2401
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51849 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-01 21:55:55 +00:00
Duncan Sands
f413cdfb0b
When simplifying a call to a bitcast function, tighten up
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the conditions for performing the transform when only the
function declaration is available: no longer allow turning
i32 into i64 for example. Only allow changing between
pointer types, and between pointer types and integers of
the same size. For return values ptr -> intptr was already
allowed; I added ptr -> ptr and intptr -> ptr while there.
As shown by a recent objc testcase, changing the way
parameters/return values are passed can be fatal when calling
code written in assembler that directly manipulates call
arguments and return values unless the transform has no
impact on the way they are passed at the codegen level.
While it is possible to imagine an ABI that treats integers
of pointer size differently to pointers, I don't think LLVM
supports any so the transform should now be safe while still
being useful.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51834 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-01 07:38:42 +00:00
Nick Lewycky
517e1f5cd7
Peer through sext/zext when looking for not(cmp).
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51819 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-31 19:01:33 +00:00
Nick Lewycky
9419ddb289
Add more i1 optimizations. add, sub, mul, s/udiv on i1 are now simplified away.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51817 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-31 17:59:52 +00:00
Nick Lewycky
fd12a0b20b
Adding i1 is always Xor.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51816 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-31 17:10:28 +00:00
Owen Anderson
038a8746c9
Replace the old ADCE implementation with a new one that more simply solves
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the one case that ADCE catches that normal DCE doesn't: non-induction variable
loop computations.
This implementation handles this problem without using postdominators.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51668 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-29 08:45:13 +00:00
Chris Lattner
a935db8ea2
Implement PR2370: memmove(x,x,size) -> noop.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51636 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-28 05:30:41 +00:00
Nick Lewycky
3dfd7bf511
"ret (constexpr)" can't be folded into a Constant. Add a method to
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Analysis/ConstantFolding to fold ConstantExpr's, then make instcombine use it
to try to use targetdata to fold constant expressions on void instructions.
Also extend the icmp(inttoptr, inttoptr) folding to handle the case where
int size != ptr size.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51559 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-25 20:56:15 +00:00
Chris Lattner
393f7eb60a
Fix a serious brain-o. Obviously no-one reviewed my patch :(
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This fixes PR2359
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51536 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-24 04:06:28 +00:00
Chris Lattner
60301608f8
Fix PR2358 by resolving calls with undef arguments to overdefined.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51535 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-24 03:59:33 +00:00
Dan Gohman
3bf19e4c42
Remove lingering references to .llx and .tr in the tests.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51500 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-23 21:15:35 +00:00
Matthijs Kooijman
5e179a23e3
Restucture a part of the SimplifyCFG pass and include a testcase.
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The SimplifyCFG pass looks at basic blocks that contain only phi nodes,
followed by an unconditional branch. In a lot of cases, such a block (BB) can
be merged into their successor (Succ).
This merging is performed by TryToSimplifyUncondBranchFromEmptyBlock. It does
this by taking all phi nodes in the succesor block Succ and expanding them to
include the predecessors of BB. Furthermore, any phi nodes in BB are moved to
Succ and expanded to include the predecessors of Succ as well.
Before attempting this merge, CanPropagatePredecessorsForPHIs checks to see if
all phi nodes can be properly merged. All functional changes are made to
this function, only comments were updated in
TryToSimplifyUncondBranchFromEmptyBlock.
In the original code, CanPropagatePredecessorsForPHIs looks quite convoluted
and more like stack of checks added to handle different kinds of situations
than a comprehensive check. In particular the first check in the function did
some value checking for the case that BB and Succ have a common predecessor,
while the last check in the function simply rejected all cases where BB and
Succ have a common predecessor. The first check was still useful in the case
that BB did not contain any phi nodes at all, though, so it was not completely
useless.
Now, CanPropagatePredecessorsForPHIs is restructured to to look a lot more
similar to the code that actually performs the merge. Both functions now look
at the same phi nodes in about the same order. Any conflicts (phi nodes with
different values for the same source) that could arise from merging or moving
phi nodes are detected. If no conflicts are found, the merge can happen.
Apart from only restructuring the checks, two main changes in functionality
happened.
Firstly, the old code rejected blocks with common predecessors in most cases.
The new code performs some extra checks so common predecessors can be handled
in a lot of cases. Wherever common predecessors still pose problems, the
blocks are left untouched.
Secondly, the old code rejected the merge when values (phi nodes) from BB were
used in any other place than Succ. However, it does not seem that there is any
situation that would require this check. Even more, this can be proven.
Consider that BB is a block containing of a single phi node "%a" and a branch
to Succ. Now, since the definition of %a will dominate all of its uses, BB
will dominate all blocks that use %a. Furthermore, since the branch from BB to
Succ is unconditional, Succ will also dominate all uses of %a.
Now, assume that one predecessor of Succ is not dominated by BB (and thus not
dominated by Succ). Since at least one use of %a (but in reality all of them)
is reachable from Succ, you could end up at a use of %a without passing
through it's definition in BB (by coming from X through Succ). This is a
contradiction, meaning that our original assumption is wrong. Thus, all
predecessors of Succ must also be dominated by BB (and thus also by Succ).
This means that moving the phi node %a from BB to Succ does not pose any
problems when the two blocks are merged, and any use checks are not needed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51478 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-23 09:09:41 +00:00
Nick Lewycky
18b3da6c34
Constant integer vectors may also be negated.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51476 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-23 04:54:45 +00:00
Nick Lewycky
02d639fcc0
Revert X + X --> X * 2 optz'n which pessimizes heavily on x86.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51474 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-23 04:34:58 +00:00
Nick Lewycky
8539fe26b7
Implement X + X for vectors.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51472 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-23 04:14:51 +00:00
Nick Lewycky
39ac3b57bc
Fix a recently added optimization to not crash on vectors.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51471 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-23 03:26:47 +00:00
Dan Gohman
a332f17c8c
Generalize the new code in instcombine's ComputeNumSignBits for handling
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and/or to handle more cases (such as this add-sitofp.ll testcase), and
port it to selectiondag's ComputeNumSignBits.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51469 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-23 02:28:01 +00:00
Gabor Greif
5edf210bdf
Eliminate questionable syntax for stdin redirection. This probably also speeds things up a bit.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51357 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-20 22:07:21 +00:00
Chris Lattner
eb0fdc150a
Fix PR2346 by marking vaarg as volatile so that licm doesn't try to
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hoist them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51356 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-20 22:05:28 +00:00
Dan Gohman
7a9708b984
Oops, commit the version of this test that actually works.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51351 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-20 21:19:36 +00:00
Dan Gohman
f35c8822a3
Port SelectionDAG's ComputeNumSignBits-using code to instcombine,
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now that instcombine also has ComputeNumSignBits.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51350 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-20 21:01:12 +00:00
Gabor Greif
f6cadc440c
sabre brings to my attention that the 'tr' suffix is also obsolete
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51349 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-20 21:00:03 +00:00
Gabor Greif
722243bd40
Rename the last test with .llx extension to .ll, resolve duplicate test by renaming to isnan2. Now that no test has llx ending there is no need to search for them from dg.exp too.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51328 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-20 19:52:04 +00:00
Chris Lattner
3d28b1b35b
Teach instcombine 4 new xforms:
...
(add (sext x), cst) --> (sext (add x, cst'))
(add (sext x), (sext y)) --> (sext (add int x, y))
(add double (sitofp x), fpcst) --> (sitofp (add int x, intcst))
(add double (sitofp x), (sitofp y)) --> (sitofp (add int x, y))
This generally reduces conversions. For example MiBench/telecomm-gsm
gets these simplifications:
HACK2: %tmp67.i142.i.i = sext i16 %tmp6.i141.i.i to i32 ; <i32> [#uses=1]
%tmp23.i139.i.i = sext i16 %tmp2.i138.i.i to i32 ; <i32> [#uses=1]
%tmp8.i143.i.i = add i32 %tmp67.i142.i.i, %tmp23.i139.i.i ; <i32> [#uses=3]
HACK2: %tmp67.i121.i.i = sext i16 %tmp6.i120.i.i to i32 ; <i32> [#uses=1]
%tmp23.i118.i.i = sext i16 %tmp2.i117.i.i to i32 ; <i32> [#uses=1]
%tmp8.i122.i.i = add i32 %tmp67.i121.i.i, %tmp23.i118.i.i ; <i32> [#uses=3]
HACK2: %tmp67.i.i190.i = sext i16 %tmp6.i.i189.i to i32 ; <i32> [#uses=1]
%tmp23.i.i187.i = sext i16 %tmp2.i.i186.i to i32 ; <i32> [#uses=1]
%tmp8.i.i191.i = add i32 %tmp67.i.i190.i, %tmp23.i.i187.i ; <i32> [#uses=3]
HACK2: %tmp67.i173.i.i.i = sext i16 %tmp6.i172.i.i.i to i32 ; <i32> [#uses=1]
%tmp23.i170.i.i.i = sext i16 %tmp2.i169.i.i.i to i32 ; <i32> [#uses=1]
%tmp8.i174.i.i.i = add i32 %tmp67.i173.i.i.i, %tmp23.i170.i.i.i ; <i32> [#uses=3]
HACK2: %tmp67.i152.i.i.i = sext i16 %tmp6.i151.i.i.i to i32 ; <i32> [#uses=1]
%tmp23.i149.i.i.i = sext i16 %tmp2.i148.i.i.i to i32 ; <i32> [#uses=1]
%tmp8.i153.i.i.i = add i32 %tmp67.i152.i.i.i, %tmp23.i149.i.i.i ; <i32> [#uses=3]
HACK2: %tmp67.i.i.i.i = sext i16 %tmp6.i.i.i.i to i32 ; <i32> [#uses=1]
%tmp23.i.i5.i.i = sext i16 %tmp2.i.i.i.i to i32 ; <i32> [#uses=1]
%tmp8.i.i7.i.i = add i32 %tmp67.i.i.i.i, %tmp23.i.i5.i.i ; <i32> [#uses=3]
This also fixes a bug in ComputeNumSignBits handling select and
makes it more aggressive with and/or.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51302 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-20 05:46:13 +00:00
Devang Patel
52abbf5d8a
Do not erase induction variable increment if it is used outside the loop.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51280 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-19 22:23:55 +00:00
Chris Lattner
0c7a9a04e7
convert fptosi(sitofp x) -> x if the fp value has enough bits in its mantissa
...
to accurately represent the integer. This triggers 9 times in 471.omnetpp,
though 8 of those seem to be inlined from the same place.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51271 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-19 20:25:04 +00:00
Chris Lattner
a540623ab1
Fold FP comparisons where one operand is converted from an integer
...
type and the other operand is a constant into integer comparisons.
This happens surprisingly frequently (e.g. 10 times in 471.omnetpp),
which are things like this:
%tmp8283 = sitofp i32 %tmp82 to double
%tmp1013 = fcmp ult double %tmp8283, 0.0
Clearly comparing tmp82 against i32 0 is cheaper here.
this also triggers 8 times in gobmk, including this one:
%tmp375376 = sitofp i32 %tmp375 to double
%tmp377 = fcmp ogt double %tmp375376, 8.150000e+01
which is comparing an integer against 81.5 :).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51268 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-19 20:18:56 +00:00
Chris Lattner
5e0d71877c
be more aggressive about transforming add -> or when the operands have no
...
intersecting bits. This triggers all over the place, for example in lencode,
with adds of stuff like:
%tmp580 = mul i32 %tmp579, 2
%tmp582 = and i32 %b8, 1
and
%tmp28 = shl i32 %abs.i, 1
%sign.0 = select i1 %tmp23, i32 1, i32 0
and
%tmp344 = shl i32 %tmp343, 2
%tmp346 = and i32 %tmp96, 3
etc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51263 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-19 20:01:56 +00:00
Duncan Sands
ec00fcb33d
Fix PR2341 - when the length is 4 use an i32 not
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an i16! Cleaned up trailing whitespace while there.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51240 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-19 09:27:24 +00:00
Chris Lattner
47c9909a26
Fix PR2339
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51226 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-18 04:11:26 +00:00
Chris Lattner
98f41d2ce7
remove empty file?
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51225 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-18 04:10:18 +00:00
Nick Lewycky
08de1e476c
Revert constant-folding change that will miscompile in some cases.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51223 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-17 19:00:05 +00:00
Nick Lewycky
d24ae8703f
Constant fold inttoptr and ptrtoint.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51216 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-17 09:03:26 +00:00
Evan Cheng
62df5c9599
Fix test.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51191 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-16 17:08:51 +00:00
Owen Anderson
3dc73d398c
Move this test from ADCE to loop deletion, where it is more appropriate.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51181 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-16 04:34:19 +00:00
Owen Anderson
ce12a2b71a
Use loop deletion instead of ADCE in these tests.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51180 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-16 04:33:37 +00:00
Owen Anderson
d870b9a4e3
Use loop deletion instead of ADCE for removing loops.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51178 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-16 04:27:38 +00:00
Chris Lattner
b2ae9e34db
implement PR2328.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51176 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-16 02:59:42 +00:00
Bill Wendling
a6c3112b1f
Situations can arise when you have a function called that returns a 'void', but
...
is bitcast to return a floating point value. The result of the instruction may
not be used by the program afterwards, and LLVM will happily remove all
instructions except the call. But, on some platforms, if a value is returned as
a floating point, it may need to be removed from the stack (like x87). Thus, we
can't get rid of the bitcast even if there isn't a use of the value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51134 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-14 22:45:20 +00:00
Devang Patel
ef3682a4fb
Simplify internalize pass. Add test case.
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Patch by Matthijs Kooijman!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51114 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-14 20:01:01 +00:00
Dale Johannesen
72997fedab
Fix for PR 2323, infinite loop in tail dup.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51063 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-13 20:06:43 +00:00
Owen Anderson
6513c1bf90
Add a testcase for non-local CSE of read-only calls.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51025 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-13 08:17:44 +00:00
Duncan Sands
eca2f99958
Testcase for PR2303.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50951 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-10 16:43:10 +00:00
Chris Lattner
7d2cbd2d43
Implement PR2298. This transforms:
...
~x < ~y --> y < x
-x == -y --> x == y
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50882 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-09 05:19:28 +00:00
Chris Lattner
2539e33893
More than just loads can read from memory: readonly calls like strlen
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also need to be checked for memory modifying instructions before we
can sink them. THis fixes the second half of PR2297.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50860 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-08 17:37:37 +00:00
Chris Lattner
0ef546e639
Make instcombine's DSE respect loads as well as stores. It is not safe to
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delete the first store in:
store x -> p
load p
store y -> p
This is for PR2297.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50859 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-08 17:20:30 +00:00
Dan Gohman
42ac929ed9
Fix a bug in the ComputeMaskedBits logic for multiply.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50793 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-07 00:35:55 +00:00
Owen Anderson
f092b64a49
Testcase for r50770.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50771 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-06 21:01:34 +00:00
Dan Gohman
23e1df8b8d
Correct the value of LowBits in srem and urem handling in
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ComputeMaskedBits.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50692 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-06 00:51:48 +00:00
Chris Lattner
8554cc2ea7
Fix a crash when threading a block that includes a MRV call result.
...
DemoteRegToStack doesn't work with MRVs yet, because it relies on the
ability to load/store things.
This fixes PR2285.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50667 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-05 20:21:22 +00:00
Dan Gohman
1d9cd50677
Fix a mistake in the computation of leading zeros for udiv.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50591 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-02 21:30:02 +00:00
Chris Lattner
e818f770bb
strength reduce exp2 into ldexp, rdar://5852514
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50586 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-02 18:43:35 +00:00
Dan Gohman
fddaa3193c
Update old-style syntax in some "not grep" tests.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50560 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-01 23:50:07 +00:00
Dale Johannesen
f1e94f74e5
New test for bug fixed in 50545.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50548 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-01 22:50:14 +00:00
Dan Gohman
e85b7585e9
Fix an overaggressive SimplifyDemandedBits optimization on urem. This
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fixes the 254.gap regression on x86 and the 403.gcc regression on x86-64.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50537 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-01 19:13:24 +00:00
Chris Lattner
2facbddb76
fix typo
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50519 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-01 06:16:48 +00:00
Chris Lattner
b1747f0b23
instcombine does memset optzns.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50518 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-01 06:16:38 +00:00
Chris Lattner
330a0c1527
simplifylibcalls doesn't optimize llvm.memmove, instcombine does.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50517 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-01 06:14:24 +00:00
Chris Lattner
042232df74
move some tests from libcall optimizer suite.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50516 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-01 06:13:48 +00:00
Owen Anderson
0cad8444cc
Move this test to LoopDeletion, where it now passes.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50474 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-30 07:17:22 +00:00
Chris Lattner
69ea9d2308
move lowering of llvm.memset -> store from simplify libcalls
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to instcombine.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50472 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-30 06:39:11 +00:00
Chris Lattner
4103bb9fc6
no reason for simplifylibcalls to simplify intrinsics, instcombine does
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a fine job.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50470 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-30 06:12:15 +00:00
Chris Lattner
0c58cacb7a
remove redundant check.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50469 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-30 06:06:37 +00:00
Owen Anderson
9dcace3caf
Fix a bug in memcpyopt where the memcpy-memcpy transform was never being applied because
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we were checking for it in the wrong order. This caused a miscompilation because the
return slot optimization assumes that the call it is dealing with is NOT a memcpy.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50444 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-29 21:26:06 +00:00
Chris Lattner
40700fe683
don't eliminate load from volatile value on paths where the load is dead.
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This fixes the second half of PR2262
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50430 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-29 17:28:22 +00:00
Chris Lattner
68608e4dd0
make this test reduced and *valid*
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50429 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-29 17:25:32 +00:00
Chris Lattner
54545ac023
fix a subtle volatile handling bug.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50428 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-29 17:13:43 +00:00
Chris Lattner
cea1fdd174
don't delete the last store to an alloca if the store is volatile.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50390 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-29 04:58:38 +00:00
Dan Gohman
00acf97feb
Fix DSE to not eliminate volatile loads with no uses.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50370 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-28 19:51:27 +00:00
Dan Gohman
23e8b71526
Teach InstCombine's ComputeMaskedBits what SelectionDAG's
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ComputeMaskedBits knows about cttz, ctlz, and ctpop. Teach
SelectionDAG's ComputeMaskedBits what InstCombine's knows
about SRem. And teach them both some things about high bits
in Mul, UDiv, URem, and Sub. This allows instcombine and
dagcombine to eliminate sign-extension operations in
several new cases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50358 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-28 17:02:21 +00:00
Chris Lattner
ffba5821ee
Fix PR2256, yet another miscompilation in simplifycfg of i
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multiple return values.
Bill, please pull this into Tak.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50332 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-28 00:19:07 +00:00
Chris Lattner
998182b380
When SRoA'ing a global variable, make sure the new globals get the
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appropriate alignment. This fixes a miscompilation of 252.eon on
x86-64 (rdar://5891920).
Bill, please pull this into Tak.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50308 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-26 07:40:11 +00:00
Nick Lewycky
280a6e607d
Remove 'unwinds to' support from mainline. This patch undoes r47802 r47989
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r48047 r48084 r48085 r48086 r48088 r48096 r48099 r48109 and r48123.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50265 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-25 16:53:59 +00:00
Chris Lattner
eede65ce6c
Don't infininitely thread branches when a threaded edge
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goes back to the block, e.g.:
Threading edge through bool from 'bb37.us.thread3829' to 'bb37.us' with cost: 1, across block:
bb37.us: ; preds = %bb37.us.thread3829, %bb37.us, %bb33
%D1361.1.us = phi i32 [ %tmp36, %bb33 ], [ %D1361.1.us, %bb37.us ], [ 0, %bb37.us.thread3829 ] ; <i32> [#uses=2]
%tmp39.us = icmp eq i32 %D1361.1.us, 0 ; <i1> [#uses=1]
br i1 %tmp39.us, label %bb37.us, label %bb42.us
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50251 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-25 04:12:29 +00:00
Chris Lattner
c9e495c534
Split some code out of the main SimplifyCFG loop into its own function.
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Fix said code to handle merging return instructions together correctly
when handling multiple return values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50199 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-24 00:01:19 +00:00
Chris Lattner
c6ee00b8ee
Rewrite multiple return value handling in SCCP. Before, the -sccp pass
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would turn every getresult instruction into undef. This helps with
rdar://5778210
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50140 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-23 05:38:20 +00:00
Chris Lattner
69e6317083
remove this testcase. It isn't testing loop rotate, it is testing all
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of -std-compile-opts and is now failing because other passes are generating
IR that looks different to input of loop rotate. Devang, please
introduce a testcase that only runs loop rotate.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50136 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-23 05:36:04 +00:00
Chris Lattner
525af20937
make this test more interesting.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50128 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-23 03:49:32 +00:00
Chris Lattner
ed98501ab7
distill down the essense of this test.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50125 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-23 03:03:42 +00:00
Dale Johannesen
02dc1a7f1f
new test
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50123 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-23 01:22:22 +00:00
Evan Cheng
f30752cbcc
Don't do: "(X & 4) >> 1 == 2 --> (X & 4) == 4" if there are more than one uses of the shift result.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50118 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-23 00:38:06 +00:00
Chris Lattner
a5ddb59a13
Start doing the significantly useful part of jump threading: handle cases
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where a comparison has a phi input and that phi is a constant. For example,
stuff like:
Threading edge through bool from 'bb2149' to 'bb2231' with cost: 1, across block:
bb2237: ; preds = %bb2231, %bb2149
%tmp2328.rle = phi i32 [ %tmp2232, %bb2231 ], [ %tmp2232439, %bb2149 ] ; <i32> [#uses=2]
%done.0 = phi i32 [ %done.2, %bb2231 ], [ 0, %bb2149 ] ; <i32> [#uses=1]
%tmp2239 = icmp eq i32 %done.0, 0 ; <i1> [#uses=1]
br i1 %tmp2239, label %bb2231, label %bb2327
or
bb38.i298: ; preds = %bb33.i295, %bb1693
%tmp39.i296.rle = phi %struct.ibox* [ null, %bb1693 ], [ %tmp39.i296.rle1109, %bb33.i295 ] ; <%struct.ibox*> [#uses=2]
%minspan.1.i291.reg2mem.1 = phi i32 [ 32000, %bb1693 ], [ %minspan.0.i288, %bb33.i295 ] ; <i32> [#uses=1]
%tmp40.i297 = icmp eq %struct.ibox* %tmp39.i296.rle, null ; <i1> [#uses=1]
br i1 %tmp40.i297, label %implfeeds.exit311, label %bb43.i301
This triggers thousands of times in spec.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50110 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-22 21:40:39 +00:00
Chris Lattner
ae65b3c791
Dig through multiple levels of AND to thread jumps if needed.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50106 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-22 20:46:09 +00:00
Chris Lattner
6bf77500c6
Teach jump threading to thread through blocks like:
...
br (and X, phi(Y, Z, false)), label L1, label L2
This triggers once on 252.eon and 6 times on 176.gcc. Blocks
in question often look like this:
bb262: ; preds = %bb261, %bb248
%iftmp.251.0 = phi i1 [ true, %bb261 ], [ false, %bb248 ] ; <i1> [#uses=4]
%tmp270 = icmp eq %struct.rtx_def* %tmp.0.i, null ; <i1> [#uses=1]
%bothcond = or i1 %iftmp.251.0, %tmp270 ; <i1> [#uses=1]
br i1 %bothcond, label %bb288, label %bb273
In this case, it is clear that it doesn't matter if tmp.0.i is null when coming from bb261. When coming from bb248, it is all that matters.
Another random example:
check_asm_operands.exit: ; preds = %check_asm_operands.exit.thr_comm, %bb30.i, %bb12.i, %bb6.i413
%tmp.0.i420 = phi i1 [ true, %bb6.i413 ], [ true, %bb12.i ], [ true, %bb30.i ], [ false, %check_asm_operands.exit.thr_comm ; <i1> [#uses=1]
call void @llvm.stackrestore( i8* %savedstack ) nounwind
%tmp4389 = icmp eq i32 %added_sets_1.0, 0 ; <i1> [#uses=1]
%tmp4394 = icmp eq i32 %added_sets_2.0, 0 ; <i1> [#uses=1]
%bothcond80 = and i1 %tmp4389, %tmp4394 ; <i1> [#uses=1]
%bothcond81 = and i1 %bothcond80, %tmp.0.i420 ; <i1> [#uses=1]
br i1 %bothcond81, label %bb4398, label %bb4397
Here is the case from 252.eon:
bb290.i.i: ; preds = %bb23.i57.i.i, %bb8.i39.i.i, %bb100.i.i, %bb100.i.i, %bb85.i.i110
%myEOF.1.i.i = phi i1 [ true, %bb100.i.i ], [ true, %bb100.i.i ], [ true, %bb85.i.i110 ], [ true, %bb8.i39.i.i ], [ false, %bb23.i57.i.i ] ; <i1> [#uses=2]
%i.4.i.i = phi i32 [ %i.1.i.i, %bb85.i.i110 ], [ %i.0.i.i, %bb100.i.i ], [ %i.0.i.i, %bb100.i.i ], [ %i.3.i.i, %bb8.i39.i.i ], [ %i.3.i.i, %bb23.i57.i.i ] ; <i32> [#uses=3]
%tmp292.i.i = load i8* %tmp16.i.i100, align 1 ; <i8> [#uses=1]
%tmp293.not.i.i = icmp ne i8 %tmp292.i.i, 0 ; <i1> [#uses=1]
%bothcond.i.i = and i1 %tmp293.not.i.i, %myEOF.1.i.i ; <i1> [#uses=1]
br i1 %bothcond.i.i, label %bb202.i.i, label %bb301.i.i
Factoring out 3 common predecessors.
On the path from any blocks other than bb23.i57.i.i, the load and compare
are dead.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50096 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-22 07:05:46 +00:00
Chris Lattner
f29984f695
add a basic testcase.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50093 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-22 06:35:14 +00:00
Chris Lattner
10c0d9179e
optimize "p != gep p, ..." better. This allows us to compile
...
getelementptr-seteq.ll into:
define i1 @test(i64 %X, %S* %P) {
%C = icmp eq i64 %X, -1 ; <i1> [#uses=1]
ret i1 %C
}
instead of:
define i1 @test(i64 %X, %S* %P) {
%A.idx.mask = and i64 %X, 4611686018427387903 ; <i64> [#uses=1]
%C = icmp eq i64 %A.idx.mask, 4611686018427387903 ; <i1> [#uses=1]
ret i1 %C
}
And fixes the second half of PR2235. This speeds up the insertion sort
case by 45%, from 1.12s to 0.77s. In practice, this will significantly
speed up for loops structured like:
for (double *P = Base + N; P != Base; --P)
...
Which happens frequently for C++ iterators.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50079 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-22 02:53:33 +00:00
Owen Anderson
a8bd65835b
Refactor memcpyopt based on Chris' suggestions. Consolidate several functions
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and simplify code that was fallout from the separation of memcpyopt and gvn.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50034 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-21 07:45:10 +00:00
Chris Lattner
5ae21fb23a
rename *.llx -> *.ll, last batch.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49971 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-19 22:32:52 +00:00
Owen Anderson
9eb883a56a
XFAIL this test for the moment. The real solution is to prevent ADCE
...
from transforming loops and adding a separate loop pass for removing
loops with know trip counts. Until that happens, ADCE is miscompiling this code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49769 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-16 04:25:42 +00:00
Owen Anderson
c008c5e08c
Add testcase for PR2213.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49517 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-11 05:13:32 +00:00
Dan Gohman
eee962e1ce
Teach InstCombine's ComputeMaskedBits to handle pointer expressions
...
in addition to integer expressions. Rewrite GetOrEnforceKnownAlignment
as a ComputeMaskedBits problem, moving all of its special alignment
knowledge to ComputeMaskedBits as low-zero-bits knowledge.
Also, teach ComputeMaskedBits a few basic things about Mul and PHI
instructions.
This improves ComputeMaskedBits-based simplifications in a few cases,
but more noticeably it significantly improves instcombine's alignment
detection for loads, stores, and memory intrinsics.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49492 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-10 18:43:06 +00:00
Chris Lattner
cc7f168c6c
Generalize getUnaryFloatFunction to handle any FP unary function, automatically
...
figuring out the suffix to use. implement pow(2,x) -> exp2(x).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49437 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-09 17:48:11 +00:00
Chris Lattner
090a816623
remove capital letter from test name.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49436 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-09 17:46:36 +00:00
Owen Anderson
a723d1e48f
Factor a bunch of functionality related to memcpy and memset transforms out of
...
GVN and into its own pass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49419 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-09 08:23:16 +00:00
Chris Lattner
77d00b0cea
many cleanups to the pow optimizer. Allow it to handle powf,
...
add support for pow(x, 2.0) -> x*x.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49411 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-09 00:07:45 +00:00
Gabor Greif
d9c7dbfe44
merge r48768 from branches/ggreif/parallelized-test
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49382 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-08 15:22:41 +00:00
Chris Lattner
f83e13ae0a
add a testcase for forming memset from noncontiguous stores.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48938 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-29 04:51:35 +00:00
Evan Cheng
d34af7875b
Handle a special case xor undef, undef -> 0. Technically this should be transformed to undef. But this is such a common idiom (misuse) we are going to handle it.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48791 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-25 20:07:13 +00:00
Tanya Lattner
6f729d601c
Byebye llvm-upgrade!
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48762 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-25 04:26:08 +00:00
Devang Patel
60a12907c3
Add incoming value from header only if phi node has any use inside the loop.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48738 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-24 20:16:14 +00:00
Chris Lattner
0b26a31ae6
apparently tclsh doesn't lex like bash. Weird.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48732 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-24 17:41:57 +00:00
Chris Lattner
263250b131
pass the option so this test tests the right thing.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48731 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-24 17:36:38 +00:00
Evan Cheng
b98a10e8a3
Transform (zext (or (icmp), (icmp))) to (or (zext (cimp), (zext icmp))) if at least one of the (zext icmp) can be transformed to eliminate an icmp.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48715 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-24 00:21:34 +00:00
Owen Anderson
856254026f
Use normal naming convention for test.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48693 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-22 21:08:33 +00:00
Chris Lattner
b017c9e89c
implement an initial hack at a straight-line store -> memset optimization.
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This fires dozens of times across spec and multisource, but I don't know
if it actually speeds stuff up. Hopefully the testers will show something
nice :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48680 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-22 05:37:16 +00:00
Chris Lattner
41dc0fcb68
Teach masked value is zero about add and sub, and use MVIZ to
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simplify things like (X & 4) >> 1 == 2 --> (X & 4) == 4.
since it is obvious that the shift doesn't remove any bits.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48631 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-21 05:19:58 +00:00
Tanya Lattner
e6d5d39c07
Upgrade tests.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48538 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-19 07:28:33 +00:00
Tanya Lattner
ce7d5db4d8
Upgrade tests.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48536 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-19 05:39:35 +00:00
Tanya Lattner
7f40dea2f1
Upgrade tests to not use llvm-upgrade.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48530 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-19 04:36:04 +00:00
Tanya Lattner
f396cc8730
Upgrade tests to not use llvm-upgrade.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48529 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-19 04:14:49 +00:00
Tanya Lattner
3a4c856323
Remove llvm-upgrade and update tests.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48527 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-19 03:47:13 +00:00
Tanya Lattner
683283763f
Upgrade tests to not use llvm-upgrade.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48484 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-18 04:14:37 +00:00
Tanya Lattner
f04d8d1593
Upgrade tests to not use llvm-upgrade.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48483 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-18 03:45:45 +00:00
Bill Wendling
b9d4f8df70
The inst combining of inttoptr into GEP with one index was using the bit size of
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the type instead of the byte size. This was causing troublesome mis-compilations.
True to form, this took 2 days to find and is a one-line fix. :-P
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48354 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-14 05:12:19 +00:00
Owen Anderson
8a97fddbc2
Fix a bug in GVN that Duncan noticed, where we potentially need to insert a
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pointer bitcast when performing return slot optimization.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48343 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-13 22:07:10 +00:00
Owen Anderson
6bb0bd52ec
Improve the return slot optimization to be both more aggressive (not limited to sret parameters), and
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safer (when the passed pointer might be invalid). Thanks to Duncan and Chris for the idea behind this,
and extra thanks to Duncan for helping me work out the trap-safety.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48280 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-12 07:37:44 +00:00
Devang Patel
8f9b551147
Fix attribute handling.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48262 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-12 00:07:03 +00:00
Devang Patel
7db30ba701
Handle multiple ret values.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48254 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-11 22:24:29 +00:00
Dan Gohman
882d87d168
Check to see if a two-entry PHI block can be simplified
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before trying to merge the block into its predecessors.
This allows two-entry-phi-return.ll to be simplified
into a single basic block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48252 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-11 21:53:06 +00:00
Dan Gohman
a8ab8938a7
Make this test more challenging to help it avoid being
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optimized away before it tests what it is intended to test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48251 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-11 21:47:57 +00:00
Devang Patel
7c490d4104
Initial multiple return values support.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48210 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-11 05:46:42 +00:00
Dan Gohman
43ca31e3dc
Upgrade this test.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48207 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-11 02:19:59 +00:00
Devang Patel
3e030e41ae
Simplify
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48163 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-10 18:38:30 +00:00
Tanya Lattner
ceca194c43
Remove llvm-upgrade and update tests.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48137 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-10 07:21:50 +00:00
Nick Lewycky
9be3c97183
Turn unwind_to into "unwinds to".
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48123 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-10 02:20:00 +00:00
Tanya Lattner
76806b6a43
Remove llvm-upgrade and update tests.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48103 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-09 08:16:40 +00:00
Nick Lewycky
3f4cc3101e
Firstly, having a BranchInst isn't exclusive with having an unwind_to.
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Secondly, we have to check whether the branch is actually pointing to the block
with the unwind in it. We could have gotten here because of the unwind_to alone.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48099 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-09 07:50:37 +00:00
Nick Lewycky
db96ae9607
A BB that unwind_to an "unwind" inst is that same as one that doesn't unwind_to
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at all.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48096 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-09 07:36:38 +00:00
Nick Lewycky
6af31aab63
Update the inliner and simplifycfg to handle unwind_to.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48086 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-09 05:10:13 +00:00
Nick Lewycky
c0d025f54f
Prune the unwind_to labels on BBs that don't need them. Another step in the
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removal of invoke, PR1269.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48084 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-09 04:55:16 +00:00
Devang Patel
12a466b9d0
Update inliner to handle functions that return multiple values.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48020 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-07 20:06:16 +00:00
Devang Patel
160e08fb3e
Place for sret promotion tests.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48016 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-07 20:00:15 +00:00
Nick Lewycky
64df3bc625
Commit the testcase too.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47988 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-06 06:50:03 +00:00
Nick Lewycky
c1a2a61201
Don't try to simplify urem and srem using arithmetic rules that don't work
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under modulo (overflow). Fixes PR1933.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47987 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-06 06:48:30 +00:00
Devang Patel
37963556e3
Use cast instead of dyn_cast.
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Update test to use multiple return value directly, instead of relying on -sretpromotion.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47907 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-04 21:45:28 +00:00
Devang Patel
dc00d42bb1
Handle multiple return values.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47904 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-04 21:15:15 +00:00
Tanya Lattner
ec9a35a6f9
Remove llvm-upgrade and update test cases.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47793 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-01 09:15:35 +00:00
Chris Lattner
9d34c4d678
fix a bug Anders ran into where scalarrepl would crash when promoting
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a union containing a vector and an array whose elements were smaller than
the vector elements. this means we need to compile the load of the
array elements into an extract element plus a truncate.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47752 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-29 07:12:06 +00:00
Chris Lattner
5ebd93630b
Folding or(fcmp,fcmp) only works if the operands of the fcmps are the same fp type.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47750 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-29 06:09:11 +00:00
Owen Anderson
bf931bb094
Add PR number to testcase.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47640 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-26 23:16:11 +00:00
Owen Anderson
77db50f68f
Fix an issue where GVN had the sizes of the two memcpy's reverse, resulting
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in an invalid transformation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47639 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-26 23:06:17 +00:00
Chris Lattner
36ab30102a
fix this test so that the fn name doesn't match the regex
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47608 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-26 18:13:51 +00:00
Gabor Greif
72c8f0d156
Really feed llvm-as with the testcase, do not let it read from stdin. This fixes the hangs seen on solaris10.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47604 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-26 13:37:13 +00:00
Owen Anderson
c0808a7e1d
Fix an issue where GVN was performing the return slot optimization when it was
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not safe. This is fixed by more aggressively checking that the return slot is
not used elsewhere in the function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47544 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-25 04:08:09 +00:00
Owen Anderson
0f7ea1ab10
Fix an issue where GVN would try to use an instruction before its definition when performing return slot optimization.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47541 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-25 00:40:41 +00:00
Zhou Sheng
f65a0f7860
Testcase for Revision 47478.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47531 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-23 10:59:51 +00:00
Nick Lewycky
e0cfecf47d
Correctly fold divide-by-constant, even when faced with overflow.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47287 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-18 22:48:05 +00:00
Chris Lattner
ea0415957d
make this just a bit more strict.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47274 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-18 17:33:10 +00:00
Owen Anderson
5aa4f2a085
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47265 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-18 09:24:53 +00:00
Chris Lattner
bf1d8a7099
optimize away stackrestore calls that have no intervening alloca or call.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47258 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-18 06:12:38 +00:00
Chris Lattner
28cb2051c8
upgrade this test.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47257 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-18 06:11:00 +00:00
Chris Lattner
dd12f96c5e
Fold (-x + -y) -> -(x+y) which promotes better association, fixing
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the second half of PR2047
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47244 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-17 21:03:36 +00:00
Chris Lattner
0b0803ae15
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
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47241 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-17 20:51:26 +00:00
Chris Lattner
f06c3c29ac
upgrade and simplify this test.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47240 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-17 20:48:43 +00:00
Duncan Sands
3d5378ff8e
Remove any 'nest' parameter attributes if the function
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is not passed as an argument to a trampoline intrinsic.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47220 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-16 20:56:04 +00:00
Devang Patel
9b03daa2a3
If loop header is also loop exiting block then OrigPN is incoming value for B loop header.
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Fixes PR 2030.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47141 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-14 23:18:47 +00:00
Chris Lattner
8c5c22f610
Fix PR2029
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47129 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-14 19:18:13 +00:00
Nick Lewycky
c91b49b890
Testcase for PR2032.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47113 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-14 07:15:11 +00:00
Devang Patel
ea06906559
A loop latch phi node may have uses inside loop, not just in loop header.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47093 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-13 22:23:07 +00:00
Devang Patel
23067dfeac
While moving exit condition, do not drop loop latch on the floor.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47089 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-13 22:06:36 +00:00
Devang Patel
02c4836f3d
Keep track of exit value operand number when operands are swapped.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47082 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-13 19:48:48 +00:00
Eli Friedman
35327b3e57
Add a note pointing to PR1996.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47055 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-13 07:56:04 +00:00
Eli Friedman
261c704da1
Add test for PR1996. (This is my first time adding a test for a
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transform, so please review.)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47050 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-13 06:55:57 +00:00
Owen Anderson
30b4bd4d10
Re-apply the patch to improve the optimizations of memcpy's, with several
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bugs fixed. This now passes PPC bootstrap.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47026 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-12 21:15:18 +00:00
Devang Patel
82ada54da0
Fix PR 1995.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46898 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-08 22:49:13 +00:00
Bill Wendling
e00fec554b
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46822 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-06 20:03:07 +00:00
Chris Lattner
7c95debb49
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46739 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-05 04:45:32 +00:00
Owen Anderson
d02c0bc984
Make this test more aggressive, to cover recent improvements.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46695 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-04 04:55:24 +00:00
Owen Anderson
6f7a52d300
Allow GVN to hack on memcpy's, making them open to further optimization.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46693 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-04 02:59:58 +00:00
Nick Lewycky
f2a5f012f3
Tag this test with the PR reference.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46688 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-03 16:35:19 +00:00
Nick Lewycky
5be2920149
There are some cases where icmp(add) can be folded into a new icmp. Handle them.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46687 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-03 16:33:09 +00:00
Duncan Sands
532d022794
Don't drop function/call return attributes like 'nounwind'.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46645 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-01 20:37:16 +00:00
Owen Anderson
772601a885
Make DSE much more aggressive by performing DCE earlier. Update a testcase to reflect this increased aggressiveness.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46542 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-30 01:24:47 +00:00