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2476 Commits

Author SHA1 Message Date
Eric Christopher
8af4e41734 Add file. 
llvm-svn: 138083
 2011-08-19 21:21:20 +00:00
Dan Gohman
b38940135b Track a retain+release nesting level independently of the 
known-incremented level, because the two concepts can be used
to prove the saftey of a retain+release removal in different
ways.

llvm-svn: 138016
 2011-08-19 00:26:36 +00:00
Eli Friedman
9a468153e1 Atomic load/store handling for the passes using memdep (GVN, DSE, memcpyopt). 
llvm-svn: 137888
 2011-08-17 22:22:24 +00:00
Eli Friedman
d7749be2d7 Silly mistake from r137777; restore significant isStructTy() checks. While here, be a bit more defensive 
with unknown instructions.

Fixes PR10687.

llvm-svn: 137836
 2011-08-17 18:10:43 +00:00
Eli Friedman
e1df253200 An additional atomic test; related to r137662. 
llvm-svn: 137786
 2011-08-16 23:29:17 +00:00
Eli Friedman
0793eb4c46 A bunch of misc fixes to SCCPSolver::ResolvedUndefsIn, including a fix to stop 
making random bad assumptions about instructions which are not explicitly listed.  

Includes fix for rdar://9956541, a version of "undef ^ undef should return
0 because it's easier than arguing with users".

llvm-svn: 137777
 2011-08-16 22:06:31 +00:00
Eli Friedman
56f2f21254 Minor bug in SCCP found by inspection. (I don't think it's possible to hit this with a normal pass pipeline, but fixing for completeness.) 
llvm-svn: 137755
 2011-08-16 21:12:35 +00:00
Eli Friedman
ac992afd93 Fix test. 
llvm-svn: 137703
 2011-08-16 01:42:56 +00:00
Eli Friedman
a917d4f9b4 Revert a bit of r137667; the logic in question can safely handle atomic load/store. 
llvm-svn: 137702
 2011-08-16 01:28:22 +00:00
Eric Christopher
5403862ab7 Migrate this test from llvm/test/FrontendC++/ptr-to-method-devirt.cpp and 
FileCheckize. It is more properly an optimizer test.

llvm-svn: 137700
 2011-08-16 01:17:17 +00:00
Eli Friedman
0ffdf2ea0b Update SimplifyCFG for atomic operations. 
This commit includes a mention of the landingpad instruction, but it's not
changing the behavior around it.  I think the current behavior is correct,
though.  Bill, can you double-check that?

llvm-svn: 137691
 2011-08-15 23:59:28 +00:00
Eli Friedman
01a67111d1 Add comments and test for atomic load/store and mem2reg. 
llvm-svn: 137690
 2011-08-15 23:55:52 +00:00
Eli Friedman
8bc586e770 Update instcombine for atomic load/store. 
llvm-svn: 137664
 2011-08-15 22:09:40 +00:00
Eli Friedman
91386c7be4 Atomic load/store support in LICM. 
llvm-svn: 137648
 2011-08-15 20:52:09 +00:00
Eric Christopher
990dd3d0fb Add an ipsccp test. Migrated from test/FrontendC++. 
llvm-svn: 137646
 2011-08-15 20:50:36 +00:00
Nick Lewycky
746e317953 This transform is not safe. Thanks to Eli for pointing that out! 
llvm-svn: 137575
 2011-08-14 04:51:49 +00:00
Nick Lewycky
ae13df60a6 Don't attempt to add 'nsw' when intermediate instructions had no such guarantee. 
llvm-svn: 137572
 2011-08-14 03:41:33 +00:00
Nick Lewycky
de49278c26 Teach instcombine to preserve the nsw bit by doing an after-the-fact analysis 
when combining add and sub instructions. Patch by Pranav Bhandarkar!

llvm-svn: 137570
 2011-08-14 01:45:19 +00:00
Eli Friedman
02e737b08e Move "atomic" and "volatile" designations on instructions after the opcode 
of the instruction.

Note that this change affects the existing non-atomic load and store
instructions; the parser now accepts both forms, and the change is noted
in the release notes.

llvm-svn: 137527
 2011-08-12 22:50:01 +00:00
Dan Gohman
10a18d55ce Don't convert objc_autoreleaseReturnValue to objc_autorelease if the result 
is returned through a bitcast.

llvm-svn: 137402
 2011-08-12 00:36:31 +00:00
Dan Gohman
121302772d Don't let arbitrary calls disrupt nested retain+release pairs if 
the retains and releases all use the same SSA pointer value.

Also, don't let CFG hazards disrupt nested retain+release pair
optimizations.

llvm-svn: 137399
 2011-08-12 00:26:31 +00:00
Andrew Trick
2d8494a030 A slew of unit tests for the recent LoopInfo::updateUnloop feature 
checked in at r137276 and r137341.

llvm-svn: 137385
 2011-08-11 23:38:09 +00:00
Andrew Trick
2b6860f0a1 Allow loop unrolling to get known trip counts from ScalarEvolution. 
SCEV unrolling can unroll loops with arbitrary induction variables. It
is a prerequisite for -disable-iv-rewrite performance. It is also
easily handles loops of arbitrary structure including multiple exits
and is generally more robust.

This is under a temporary option to avoid affecting default
behavior for the next couple of weeks. It is needed so that I can
checkin unit tests for updateUnloop.

llvm-svn: 137384
 2011-08-11 23:36:16 +00:00
Andrew Trick
4d0040baf8 Invoke SimplifyIndVar when we partially unroll a loop. Fixes PR10534. 
llvm-svn: 137203
 2011-08-10 04:29:49 +00:00
Andrew Trick
b72bbe2a92 Fix the LoopUnroller to handle nontrivial loops and partial unrolling. 
These are not individual bug fixes. I had to rewrite a good chunk of
the unroller to make it sane. I think it was getting lucky on trivial
completely unrolled loops with no early exits. I included some fairly
simple unit tests for partial unrolling. I didn't do much stress
testing, so it may not be perfect, but should be usable now.

llvm-svn: 137190
 2011-08-10 00:28:10 +00:00
Dan Gohman
b24a1d29cb Tidy up these testcases to look more like real code does. 
llvm-svn: 137085
 2011-08-09 00:33:11 +00:00
Andrew Trick
6d45a01b67 Made SCEV's UDiv expressions more canonical. When dividing a 
recurrence, the initial values low bits can sometimes be ignored.

To take advantage of this, added FoldIVUser to IndVarSimplify to fold
an IV operand into a udiv/lshr if the operator doesn't affect the
result.

-indvars -disable-iv-rewrite now transforms

i = phi i4
i1 = i0 + 1
idx = i1 >> (2 or more)
i4 = i + 4

into

i = phi i4
idx = i0 >> ...
i4 = i + 4

llvm-svn: 137013
 2011-08-06 07:00:37 +00:00
Bill Wendling
2d3138c112 Remove the LowerSetJmp pass. It wasn't used effectively by any of the targets. 
This is some of my original LLVM code. *wipes tear*

llvm-svn: 136821
 2011-08-03 22:18:20 +00:00
Andrew Trick
bf69d03382 SCEV: Use AssertingVH to catch dangling BasicBlock* when passes forget 
to notify SCEV of a change. Add forgetLoop in a couple of those places.

llvm-svn: 136797
 2011-08-03 18:32:11 +00:00
Chris Lattner
5b82a0ac0c fix PR10286, a problem with the .ll printer handling block addresses that are out-of-scope. 
llvm-svn: 136768
 2011-08-03 06:15:41 +00:00
Nick Lewycky
50f4966ceb Fix logical error when detecting lifetime intrinsics. 
Don't replace a gep/bitcast with 'undef' because that will form a "free(undef)"
which in turn means "unreachable". What we wanted was a no-op. Instead, analyze
the whole tree and look for all the instructions we need to delete first, then
delete them second, not relying on the use_list to stay consistent.

llvm-svn: 136752
 2011-08-03 00:43:35 +00:00
Nick Lewycky
e8ae02dfb9 Teach InstCombine that lifetime intrincs aren't a real user on the result of a 
malloc call.

llvm-svn: 136732
 2011-08-02 22:08:01 +00:00
Nick Lewycky
99890a225f Lifetime intrinsics on undef are dead. 
llvm-svn: 136722
 2011-08-02 21:19:27 +00:00
Benjamin Kramer
c4189ff0fc Remove empty test. 
llvm-svn: 136675
 2011-08-02 02:47:45 +00:00
Owen Anderson
bddf40e082 Revert r136503 and r136480 in an effort to fix non-determinism in the llvm-gcc buildbots on i386. Devang is looking into the root cause. 
llvm-svn: 136674
 2011-08-02 02:23:42 +00:00
Rafael Espindola
a3a44f3fc3 Add a small gep optimization I noticed was missing while reading some IL. 
llvm-svn: 136585
 2011-07-31 04:43:41 +00:00
Devang Patel
3e02522fee Clean up debug info after reassociation. 
llvm-svn: 136480
 2011-07-29 19:00:35 +00:00
Eli Friedman
530341d748 Make sure to correctly clear the exact/nuw/nsw flags off of shifts when they are combined together. <rdar://problem/9859829> 
llvm-svn: 136435
 2011-07-29 00:18:19 +00:00
Nick Lewycky
8ac9ecedfd Teach the ConstantMerge pass about alignment. Fixes PR10514! 
llvm-svn: 136250
 2011-07-27 19:47:34 +00:00
Nick Lewycky
15e2d90746 Finish adding support for lifetime intrinsics to SROA. Fixes PR10121! 
llvm-svn: 136008
 2011-07-25 23:14:22 +00:00
Dan Gohman
6320f52ff4 Move the last uses of RetainFunc etc. over to using getRetainCallee() etc. 
so that a declaration for objc_retain is created when needed if it doesn't
already exist. rdar://9825114.

llvm-svn: 135821
 2011-07-22 22:29:21 +00:00
Dan Gohman
e106aee6f5 Fix MergeInVectorType to check for vector types with the same alloc 
size but different element types, so that it filters out the cases
that CreateShuffleVectorCast doesn't handle. This fixes rdar://9786827.

llvm-svn: 135721
 2011-07-21 23:30:09 +00:00
Andrew Trick
bd243d0dfe LSR, correct fix for rdar://9786536. Silly casting bug. 
llvm-svn: 135654
 2011-07-21 01:45:54 +00:00
Andrew Trick
858e9f083d LSR must sometimes sign-extend before generating double constants. 
rdar://9786536

llvm-svn: 135650
 2011-07-21 01:05:01 +00:00
Andrew Trick
8acb434402 LSR crashes on an empty IVUsers list. 
rdar://9786536

llvm-svn: 135644
 2011-07-21 00:40:04 +00:00
Eli Friedman
0cdc148ab8 Bring LICM into compliance with the new "Memory Model for Concurrent Operations" in LangRef. 
llvm-svn: 135625
 2011-07-20 21:37:47 +00:00
Andrew Trick
638b355a16 indvars: Added getInsertPointForUses to find a valid place to truncate the IV. 
llvm-svn: 135568
 2011-07-20 05:32:06 +00:00
Andrew Trick
f53622e129 indvars test case for r135558. 
llvm-svn: 135559
 2011-07-20 02:14:37 +00:00
Andrew Trick
c5dd3e976a indvars -disable-iv-rewrite fix: derived GEP IVs 
llvm-svn: 135558
 2011-07-20 02:08:58 +00:00
Eli Friedman
55d6ccbb79 PR10386: Don't try to split an edge from an indirectbr. 
llvm-svn: 135534
 2011-07-19 22:59:41 +00:00