2a0ca3e937
Reapply this transformation now that it is passing the external test which it previously failed.
...
llvm-svn: 110987
2010-08-13 00:17:53 +00:00
ac40d49c70
Temporarily revert 110737 and 110734, they were causing failures
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in an external testsuite.
llvm-svn: 110905
2010-08-12 07:01:22 +00:00
265363061e
Add the minimal amount of smarts necessary to instcombine of shufflevectors to recognize
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patterns generated by clang for transpose of a matrix in generic vectors. This is made
of two parts:
1) Propagating vector extracts of hi/lo half into their users
2) Recognizing an insertion of even elements followed by the odd elements as an unpack.
Testcase to come, but this shrinks the # of shuffle instructions generated on x86 from ~40 to the minimal 8.
llvm-svn: 110734
2010-08-10 21:38:12 +00:00
f99e7e6643
PR7853: fix a silly mistake introduced in r101899, and add a test to make sure
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it doesn't regress again.
llvm-svn: 110597
2010-08-09 20:49:43 +00:00
a7aed18624
Reapply r110396, with fixes to appease the Linux buildbot gods.
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llvm-svn: 110460
2010-08-06 18:33:48 +00:00
bda59bd247
Revert r110396 to fix buildbots.
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llvm-svn: 110410
2010-08-06 00:23:35 +00:00
755aceb5d0
Don't use PassInfo* as a type identifier for passes. Instead, use the address of the static
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ID member as the sole unique type identifier. Clean up APIs related to this change.
llvm-svn: 110396
2010-08-05 23:42:04 +00:00
3619660529
Make instcombine set explicit alignments on load or store
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instructions with alignment 0, so that subsequent passes don't
need to bother checking the TargetData ABI size manually.
llvm-svn: 110128
2010-08-03 18:20:32 +00:00
35e8a6209d
Use unary + instead of a separate local variable for working
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around std::min vs static const friction.
llvm-svn: 110112
2010-08-03 16:15:50 +00:00
8f306a779b
Re-apply the infamous r108614, with a fix pointed out by Dirk Steinke.
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llvm-svn: 110036
2010-08-02 09:32:13 +00:00
0b636a24c7
Speculatively revert r108614, "Another attempt at getting the clang self-host to
...
like my instcombine patch.", in an attempt to fix Clang i386 bootstrap.
- Also PR7719.
llvm-svn: 109953
2010-07-31 19:51:11 +00:00
d566d2c7b5
Move MaximumAlignment to be a member of the Value class.
...
llvm-svn: 109891
2010-07-30 21:07:05 +00:00
0428a61e45
PR7750: !CExpr->isNullValue() only properly computes whether CExpr is nonnull
...
if CExpr is a ConstantInt.
llvm-svn: 109773
2010-07-29 18:03:33 +00:00
a7e5a24093
Define a maximum supported alignment value for load, store, and
...
alloca instructions (constrained by their internal encoding),
and add error checking for it. Fix an instcombine bug which
generated huge alignment values (null is infinitely aligned).
This fixes undefined behavior noticed by John Regehr.
llvm-svn: 109643
2010-07-28 20:12:04 +00:00
9cd20bf792
When user code intentionally dereferences null, the alignment of the
...
dereference is theoretically infinite. Put a cap on the computed
alignment to avoid overflow, noticed by John Regehr.
llvm-svn: 109596
2010-07-28 17:14:23 +00:00
dde79d8f1a
mass elimination of reliance on automatic iterator dereferencing
...
llvm-svn: 109103
2010-07-22 13:36:47 +00:00
3e44ea1917
undo 80 column trespassing I caused
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llvm-svn: 109092
2010-07-22 10:37:47 +00:00
a57b97e7e7
Fix batch of converting RegisterPass<> to INTIALIZE_PASS().
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llvm-svn: 109045
2010-07-21 22:09:45 +00:00
84774eda4b
Tweak per Chris' comments.
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llvm-svn: 108736
2010-07-19 19:23:32 +00:00
32a58342ed
Reimplement r108639 in InstCombine rather than DAGCombine.
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llvm-svn: 108687
2010-07-19 08:09:34 +00:00
7d2818b073
Another attempt at getting the clang self-host to like my instcombine patch.
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llvm-svn: 108614
2010-07-17 06:56:35 +00:00
8a39c807e2
Remove the rest of my instcombine changes. Back to the drawing board on this one.
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llvm-svn: 108530
2010-07-16 16:39:00 +00:00
6d673953e3
eliminate CallInst::ArgOffset
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llvm-svn: 108522
2010-07-16 09:38:02 +00:00
15a81cddb4
Also revert 108422, it's causing some test failures.
...
Working on testcases for Owen.
llvm-svn: 108494
2010-07-16 01:36:12 +00:00
eaf64d5c1e
Speculatively revert r108429 to fix the clang self-host.
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llvm-svn: 108436
2010-07-15 18:18:57 +00:00
eb08d01061
Per Chris' suggestion, get rid of the select canonicalization and just add
...
the corresponding or-icmp-and pattern. This has the added benefit of doing
the matching earlier, and thus being less susceptible to being confused by
earlier transforms.
llvm-svn: 108429
2010-07-15 17:24:23 +00:00
7151dfd48a
Reapply r108378, with bugfixes, testcase, and improved comment formatting.
...
This now passes LIT, nighty test, and llvm-gcc bootstrap on my machine.
llvm-svn: 108422
2010-07-15 15:00:23 +00:00
a8b4e3732b
Speculatively revert r108378; may be causing bootstrap failures.
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llvm-svn: 108389
2010-07-15 00:33:00 +00:00
37d91d84af
Add instcombine transforms to optimize tests of multiple bits of the same value into a single larger comparison.
...
llvm-svn: 108378
2010-07-14 23:33:51 +00:00
ec0e7b1643
revert r108320, I see the failures now...
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llvm-svn: 108322
2010-07-14 06:16:35 +00:00
658680b2f5
reapply benjamin's instcombine patch, I don't see anything wrong with it and can't repro any problems with a manual self-host.
...
llvm-svn: 108320
2010-07-14 05:59:13 +00:00
8f36402ac2
Nope, still breaks the release selfhost bots :(
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llvm-svn: 108153
2010-07-12 16:38:48 +00:00
07b695e052
Reapply the "or" half of r108136, which seems to be less problematic.
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llvm-svn: 108152
2010-07-12 16:15:48 +00:00
1b787df129
cache result of operator*
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llvm-svn: 108150
2010-07-12 15:48:26 +00:00
c719e8ae9e
Revert r108141 again, sigh.
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llvm-svn: 108148
2010-07-12 14:42:04 +00:00
96fedcb136
cache result of operator*
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llvm-svn: 108147
2010-07-12 14:15:58 +00:00
f578c36035
Reapply 108136 with an ugly pasto fixed.
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llvm-svn: 108141
2010-07-12 13:44:00 +00:00
11743249e6
Move optimization to avoid redundant matching.
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llvm-svn: 108140
2010-07-12 13:34:22 +00:00
9675e759cf
Revert r108136 until I figure out why it broke selfhost.
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llvm-svn: 108139
2010-07-12 12:35:49 +00:00
35473faa50
instcombine: fold (x & y) | (~x & z) and (x & y) ^ (~x & z) into ((y ^ z) & x) ^ z which is one instruction shorter. (PR6773)
...
before:
%and = and i32 %y, %x
%neg = xor i32 %x, -1
%and4 = and i32 %z, %neg
%xor = xor i32 %and4, %and
after:
%xor1 = xor i32 %z, %y
%and2 = and i32 %xor1, %x
%xor = xor i32 %and2, %z
llvm-svn: 108136
2010-07-12 11:54:45 +00:00
41b4a6b36a
Convert some tab stops into spaces.
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llvm-svn: 108130
2010-07-12 08:16:59 +00:00
0028cc6730
cache result of operator*
...
llvm-svn: 107972
2010-07-09 15:01:36 +00:00
60a346d0f1
do not repeatedly dereference use_iterator
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llvm-svn: 107962
2010-07-09 12:23:50 +00:00
2321e6a4d4
Teach instcombine to transform
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(X >s -1) ? C1 : C2 and (X <s 0) ? C2 : C1
into ((X >>s 31) & (C2 - C1)) + C1, avoiding the conditional.
This optimization could be extended to take non-const C1 and C2 but we better
stay conservative to avoid code size bloat for now.
for
int sel(int n) {
return n >= 0 ? 60 : 100;
}
we now generate
sarl $31, %edi
andl $40, %edi
leal 60(%rdi), %eax
instead of
testl %edi, %edi
movl $60, %ecx
movl $100, %eax
cmovnsl %ecx, %eax
llvm-svn: 107866
2010-07-08 11:39:10 +00:00
3abd881bea
use getArgOperand (corrected by CallInst::ArgOffset) instead of getOperand
...
llvm-svn: 107275
2010-06-30 12:38:26 +00:00
5b1370ee80
use ArgOperand API
...
llvm-svn: 107017
2010-06-28 16:50:57 +00:00
e23efeef10
use ArgOperand API
...
llvm-svn: 107016
2010-06-28 16:45:00 +00:00
5f3e656a1b
use ArgOperand API (some hunks I could split)
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llvm-svn: 106824
2010-06-25 07:57:14 +00:00
7ccec09252
use ArgOperand API
...
llvm-svn: 106752
2010-06-24 16:11:44 +00:00
a6d75e2cf7
use (even more, still) ArgOperand API
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llvm-svn: 106750
2010-06-24 15:51:11 +00:00
Nate Begeman