Nick Lewycky [Tue, 15 Nov 2011 01:23:22 +0000 (01:23 +0000)]
Move WEAK marking to the declaration.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144603
91177308-0d34-0410-b5e6-
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Jakob Stoklund Olesen [Tue, 15 Nov 2011 01:15:30 +0000 (01:15 +0000)]
Break false dependencies before partial register updates.
Two new TargetInstrInfo hooks lets the target tell ExecutionDepsFix
about instructions with partial register updates causing false unwanted
dependencies.
The ExecutionDepsFix pass will break the false dependencies if the
updated register was written in the previoius N instructions.
The small loop added to sse-domains.ll runs twice as fast with
dependency-breaking instructions inserted.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144602
91177308-0d34-0410-b5e6-
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Jakob Stoklund Olesen [Tue, 15 Nov 2011 01:15:25 +0000 (01:15 +0000)]
Track register ages more accurately.
Keep track of the last instruction to define each register individually
instead of per DomainValue. This lets us track more accurately when a
register was last written.
Also track register ages across basic blocks. When entering a new
basic block, use the least stale predecessor def as a worst case
estimate for register age.
The register age is used to arbitrate between conflicting domains. The
most recently defined register wins.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144601
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Devang Patel [Tue, 15 Nov 2011 01:14:37 +0000 (01:14 +0000)]
Add ObjCPropertyDebugInfo.html
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144600
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Devang Patel [Tue, 15 Nov 2011 01:11:58 +0000 (01:11 +0000)]
Document debug info support for objective-c properties.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144599
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Jim Grosbach [Tue, 15 Nov 2011 01:05:12 +0000 (01:05 +0000)]
Tidy up. Formatting.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144598
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Nick Lewycky [Tue, 15 Nov 2011 00:14:04 +0000 (00:14 +0000)]
Fix linking for some users who already have tsan enabled code and are trying to
link it against llvm code, by making our definitions weak. "Some users."
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144596
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Jim Grosbach [Mon, 14 Nov 2011 23:43:46 +0000 (23:43 +0000)]
ARM parsing datatype suffix variants for non-writeback VST1 instructions.
rdar://
10435076
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144593
91177308-0d34-0410-b5e6-
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Jim Grosbach [Mon, 14 Nov 2011 23:32:59 +0000 (23:32 +0000)]
ARM parsing datatype suffix variants for non-writeback VLD1 instructions.
rdar://
10435076
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144592
91177308-0d34-0410-b5e6-
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Jim Grosbach [Mon, 14 Nov 2011 23:21:09 +0000 (23:21 +0000)]
Add explanatory comment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144589
91177308-0d34-0410-b5e6-
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Jim Grosbach [Mon, 14 Nov 2011 23:20:14 +0000 (23:20 +0000)]
Split out the plain '.{8|16|32|64}' suffix handling.
Make it easier to deal with aliases for instructions that do require a suffix
but accept more specific variants of the same size.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144588
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Jim Grosbach [Mon, 14 Nov 2011 23:11:19 +0000 (23:11 +0000)]
ARM parsing optional datatype suffix for VAND/VEOR/VORR instructions.
rdar://
10435076
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144587
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Chad Rosier [Mon, 14 Nov 2011 23:04:09 +0000 (23:04 +0000)]
Supporting inline memmove isn't going to be worthwhile. The only way to avoid
violating a dependency is to emit all loads prior to stores. This would likely
cause a great deal of spillage offsetting any potential gains.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144585
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Jim Grosbach [Mon, 14 Nov 2011 23:03:21 +0000 (23:03 +0000)]
ARM VLDR/VSTR instructions don't need a size suffix.
Canonicallize on the non-suffixed form, but continue to accept assembly that
has any correctly sized type suffix.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144583
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Nick Lewycky [Mon, 14 Nov 2011 22:49:42 +0000 (22:49 +0000)]
Refactor capture tracking (which already had a couple flags for whether returns
and stores capture) to permit the caller to see each capture point and decide
whether to continue looking.
Use this inside memdep to do an analysis that basicaa won't do. This lets us
solve another devirtualization case, fixing PR8908!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144580
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Chad Rosier [Mon, 14 Nov 2011 22:48:33 +0000 (22:48 +0000)]
Add newline to end of file. Thanks, Eli.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144579
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Chad Rosier [Mon, 14 Nov 2011 22:46:17 +0000 (22:46 +0000)]
Add support for inlining small memcpys.
rdar://
10412592
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144578
91177308-0d34-0410-b5e6-
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Chad Rosier [Mon, 14 Nov 2011 22:34:48 +0000 (22:34 +0000)]
Fix a performance regression from r144565. Positive offsets were being lowered
into registers, rather then encoded directly in the load/store.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144576
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Jim Grosbach [Mon, 14 Nov 2011 22:28:39 +0000 (22:28 +0000)]
ARM assembly parsing type suffix options for VLDR/VSTR.
rdar://
10435076
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144575
91177308-0d34-0410-b5e6-
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Nick Lewycky [Mon, 14 Nov 2011 22:10:23 +0000 (22:10 +0000)]
Fix Windows build, don't try to #include <pthread.h> when we know it's not
available.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144574
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Evan Cheng [Mon, 14 Nov 2011 21:11:15 +0000 (21:11 +0000)]
Avoid dereferencing off the beginning of lists.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144569
91177308-0d34-0410-b5e6-
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Evan Cheng [Mon, 14 Nov 2011 21:02:09 +0000 (21:02 +0000)]
At -O0, multiple uses of a virtual registers in the same BB are being marked
"kill". This looks like a bug upstream. Since that's going to take some time
to understand, loosen the assertion and disable the optimization when
multiple kills are seen.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144568
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Nick Lewycky [Mon, 14 Nov 2011 20:50:16 +0000 (20:50 +0000)]
Add support for tsan annotations (thread sanitizer, a valgrind-based tool).
These annotations are disabled entirely when either ENABLE_THREADS is off, or
building a release build. When enabled, they add calls to functions with no
statements to ManagedStatic's getters.
Use these annotations to inform tsan that the race used inside ManagedStatic
initialization is actually benign. Thanks to Kostya Serebryany for helping
write this patch!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144567
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Evan Cheng [Mon, 14 Nov 2011 20:35:52 +0000 (20:35 +0000)]
Add a missing pattern for X86ISD::MOVLPD. rdar://
10436044
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144566
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Chad Rosier [Mon, 14 Nov 2011 20:22:27 +0000 (20:22 +0000)]
Add support for Thumb load/stores with negative offsets.
rdar://
10412592
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144565
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Benjamin Kramer [Mon, 14 Nov 2011 19:51:48 +0000 (19:51 +0000)]
Unbreak Release builds.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144560
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Evan Cheng [Mon, 14 Nov 2011 19:48:55 +0000 (19:48 +0000)]
Teach two-address pass to re-schedule two-address instructions (or the kill
instructions of the two-address operands) in order to avoid inserting copies.
This fixes the few regressions introduced when the two-address hack was
disabled (without regressing the improvements).
rdar://
10422688
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144559
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Pete Cooper [Mon, 14 Nov 2011 19:38:42 +0000 (19:38 +0000)]
Changed SSE4/AVX <2 x i64> extract and insert ops to be Custom lowered
Constant idx case is still done in tablegen but other cases are then expanded
Fixes <rdar://problem/
10435460>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144557
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Benjamin Kramer [Mon, 14 Nov 2011 19:12:20 +0000 (19:12 +0000)]
Fold ConstantVector::isAllOnesValue into Constant::isAllOnesValue and simplify it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144555
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Akira Hatanaka [Mon, 14 Nov 2011 19:06:14 +0000 (19:06 +0000)]
32-to-64-bit extended load.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144554
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Akira Hatanaka [Mon, 14 Nov 2011 19:02:54 +0000 (19:02 +0000)]
AnalyzeCallOperands function for N32/64.
N32/64 places all variable arguments in integer registers (or on stack),
regardless of their types, but follows calling convention of non-vaarg function
when it handles fixed arguments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144553
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Akira Hatanaka [Mon, 14 Nov 2011 19:01:09 +0000 (19:01 +0000)]
Modify LowerFormalArguments to correctly handle vaarg arguments for Mips64.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144552
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Justin Holewinski [Mon, 14 Nov 2011 18:58:20 +0000 (18:58 +0000)]
PTX: Let LLVM use loads/stores for all mem* intrinsics, instead of relying on custom implementations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144551
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Wesley Peck [Mon, 14 Nov 2011 18:56:41 +0000 (18:56 +0000)]
Add release notes for the MicroBlaze backend.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144550
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Akira Hatanaka [Mon, 14 Nov 2011 18:56:20 +0000 (18:56 +0000)]
Remove variable that keeps the size of area used to save byval or variable
argument registers on the callee's stack frame, along with functions that set
and get it.
It is not necessary to add the size of this area when computing stack size in
emitPrologue, since it has already been accounted for in
PEI::calculateFrameObjectOffsets.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144549
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Jakob Stoklund Olesen [Mon, 14 Nov 2011 18:45:38 +0000 (18:45 +0000)]
Fix early-clobber handling in shrinkToUses.
I broke this in r144515, it affected most ARM testers.
<rdar://problem/
10441389>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144547
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Bob Wilson [Mon, 14 Nov 2011 18:21:07 +0000 (18:21 +0000)]
Disable generation of compact unwind encodings. <rdar://problem/
10441578>
This still seems to be causing some failures. It needs more testing before
it gets enabled again.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144543
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Jakob Stoklund Olesen [Mon, 14 Nov 2011 18:03:05 +0000 (18:03 +0000)]
Delete stale comment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144542
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Jim Grosbach [Mon, 14 Nov 2011 17:52:47 +0000 (17:52 +0000)]
Tidy up. 80 column.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144538
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Benjamin Kramer [Mon, 14 Nov 2011 17:45:03 +0000 (17:45 +0000)]
Make headers standalone.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144537
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Benjamin Kramer [Mon, 14 Nov 2011 17:22:45 +0000 (17:22 +0000)]
Make headers standalone, move a virtual method out of line.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144536
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Daniel Dunbar [Mon, 14 Nov 2011 17:17:45 +0000 (17:17 +0000)]
build/Make: Switch over to using llvm-config-2 for dependencies one more (hopefully last) time, now that it also builds as a build tool.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144535
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Chandler Carruth [Mon, 14 Nov 2011 10:57:23 +0000 (10:57 +0000)]
It helps to deallocate memory as well as allocate it. =] This actually
cleans up all the chains allocated during the processing of each
function so that for very large inputs we don't just grow memory usage
without bound.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144533
91177308-0d34-0410-b5e6-
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Chandler Carruth [Mon, 14 Nov 2011 10:55:53 +0000 (10:55 +0000)]
Remove an over-eager assert that was firing on one of the ARM regression
tests when I forcibly enabled block placement.
It is apparantly possible for an unanalyzable block to fallthrough to
a non-loop block. I don't actually beleive this is correct, I believe
that 'canFallThrough' is returning true needlessly for the code
construct, and I've left a bit of a FIXME on the verification code to
try to track down why this is coming up.
Anyways, removing the assert doesn't degrade the correctness of the algorithm.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144532
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Chandler Carruth [Mon, 14 Nov 2011 09:46:33 +0000 (09:46 +0000)]
Begin chipping away at one of the biggest quadratic-ish behaviors in
this pass. We're leaving already merged blocks on the worklist, and
scanning them again and again only to determine each time through that
indeed they aren't viable. We can instead remove them once we're going
to have to scan the worklist. This is the easy way to implement removing
them. If this remains on the profile (as I somewhat suspect it will), we
can get a lot more clever here, as the worklist's order is essentially
irrelevant. We can use swapping and fold the two loops to reduce
overhead even when there are many blocks on the worklist but only a few
of them are removed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144531
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Chandler Carruth [Mon, 14 Nov 2011 09:12:57 +0000 (09:12 +0000)]
Under the hood, MBPI is doing a linear scan of every successor every
time it is queried to compute the probability of a single successor.
This makes computing the probability of every successor of a block in
sequence... really really slow. ;] This switches to a linear walk of the
successors rather than a quadratic one. One of several quadratic
behaviors slowing this pass down.
I'm not really thrilled with moving the sum code into the public
interface of MBPI, but I don't (at the moment) have ideas for a better
interface. My direction I'm thinking in for a better interface is to
have MBPI actually retain much more state and make *all* of these
queries cheap. That's a lot of work, and would require invasive changes.
Until then, this seems like the least bad (ie, least quadratic)
solution. Suggestions welcome.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144530
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Tobias Grosser [Mon, 14 Nov 2011 09:09:26 +0000 (09:09 +0000)]
Add clang_complete to release notes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144529
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Tobias Grosser [Mon, 14 Nov 2011 09:09:23 +0000 (09:09 +0000)]
Add Polly to release notes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144528
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Chandler Carruth [Mon, 14 Nov 2011 08:55:59 +0000 (08:55 +0000)]
Reuse the logic in getEdgeProbability within getHotSucc in order to
correctly handle blocks whose successor weights sum to more than
UINT32_MAX. This is slightly less efficient, but the entire thing is
already linear on the number of successors. Calling it within any hot
routine is a mistake, and indeed no one is calling it. It also
simplifies the code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144527
91177308-0d34-0410-b5e6-
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Chandler Carruth [Mon, 14 Nov 2011 08:50:16 +0000 (08:50 +0000)]
Fix an overflow bug in MachineBranchProbabilityInfo. This pass relied on
the sum of the edge weights not overflowing uint32, and crashed when
they did. This is generally safe as BranchProbabilityInfo tries to
provide this guarantee. However, the CFG can get modified during codegen
in a way that grows the *sum* of the edge weights. This doesn't seem
unreasonable (imagine just adding more blocks all with the default
weight of 16), but it is hard to come up with a case that actually
triggers 32-bit overflow. Fortuately, the single-source GCC build is
good at this. The solution isn't very pretty, but its no worse than the
previous code. We're already summing all of the edge weights on each
query, we can sum them, check for an overflow, compute a scale, and sum
them again.
I've included a *greatly* reduced test case out of the GCC source that
triggers it. It's a pretty lame test, as it clearly is just barely
triggering the overflow. I'd like to have something that is much more
definitive, but I don't understand the fundamental pattern that triggers
an explosion in the edge weight sums.
The buggy code is duplicated within this file. I'll colapse them into
a single implementation in a subsequent commit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144526
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Craig Topper [Mon, 14 Nov 2011 08:07:55 +0000 (08:07 +0000)]
Add AVX2 version of instructions to load folding tables. Also add a bunch of missing SSE/AVX instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144525
91177308-0d34-0410-b5e6-
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Chandler Carruth [Mon, 14 Nov 2011 06:51:49 +0000 (06:51 +0000)]
Add a cautionary note to this API. It was not at all obvious to me how
expensive the most useful interface to this analysis is.
Fun story -- it's also not correct. That's getting fixed in another
patch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144523
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Craig Topper [Mon, 14 Nov 2011 06:46:21 +0000 (06:46 +0000)]
Add neverHasSideEffects, mayLoad, and mayStore to many patternless SSE/AVX instructions. Remove MMX check from LowerVECTOR_SHUFFLE since MMX vector types won't go through it anyway.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144522
91177308-0d34-0410-b5e6-
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Chad Rosier [Mon, 14 Nov 2011 04:09:28 +0000 (04:09 +0000)]
Add support for ARM halfword load/stores and signed byte loads with negative
offsets.
rdar://
10412592
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144518
91177308-0d34-0410-b5e6-
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Jakob Stoklund Olesen [Mon, 14 Nov 2011 01:39:36 +0000 (01:39 +0000)]
Use getVNInfoBefore() when it makes sense.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144517
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Chandler Carruth [Mon, 14 Nov 2011 00:00:35 +0000 (00:00 +0000)]
Teach machine block placement to cope with unnatural loops. These don't
get loop info structures associated with them, and so we need some way
to make forward progress selecting and placing basic blocks. The
technique used here is pretty brutal -- it just scans the list of blocks
looking for the first unplaced candidate. It keeps placing blocks like
this until the CFG becomes tractable.
The cost is somewhat unfortunate, it requires allocating a vector of all
basic block pointers eagerly. I have some ideas about how to simplify
and optimize this, but I'm trying to get the logic correct first.
Thanks to Benjamin Kramer for the reduced test case out of GCC. Sadly
there are other bugs that GCC is tickling that I'm reducing and working
on now.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144516
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Jakob Stoklund Olesen [Sun, 13 Nov 2011 23:53:25 +0000 (23:53 +0000)]
Use kill slots instead of the previous slot in shrinkToUses.
It's more natural to use the actual end points.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144515
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Chandler Carruth [Sun, 13 Nov 2011 22:50:09 +0000 (22:50 +0000)]
Cleanup some 80-columns violations and poor formatting. These snuck by
when I was reading through the code for style.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144513
91177308-0d34-0410-b5e6-
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Jakob Stoklund Olesen [Sun, 13 Nov 2011 22:42:13 +0000 (22:42 +0000)]
Terminate all dead defs at the dead slot instead of the 'next' slot.
This makes no difference for normal defs, but early clobber dead defs
now look like:
[Slot_EarlyClobber; Slot_Dead)
instead of:
[Slot_EarlyClobber; Slot_Register).
Live ranges for normal dead defs look like:
[Slot_Register; Slot_Dead)
as before.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144512
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Craig Topper [Sun, 13 Nov 2011 22:11:24 +0000 (22:11 +0000)]
Fix comment for LegalizeTypeAction enum.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144511
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Jakob Stoklund Olesen [Sun, 13 Nov 2011 22:05:42 +0000 (22:05 +0000)]
Simplify early clobber slots a bit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144507
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Chandler Carruth [Sun, 13 Nov 2011 21:39:51 +0000 (21:39 +0000)]
Enhance the assertion mechanisms in place to make it easier to catch
when we fail to place all the blocks of a loop. Currently this is
happening for unnatural loops, and this logic helps more immediately
point to the problem.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144504
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Jakob Stoklund Olesen [Sun, 13 Nov 2011 20:45:27 +0000 (20:45 +0000)]
Rename SlotIndexes to match how they are used.
The old naming scheme (load/use/def/store) can be traced back to an old
linear scan article, but the names don't match how slots are actually
used.
The load and store slots are not needed after the deferred spill code
insertion framework was deleted.
The use and def slots don't make any sense because we are using
half-open intervals as is customary in C code, but the names suggest
closed intervals. In reality, these slots were used to distinguish
early-clobber defs from normal defs.
The new naming scheme also has 4 slots, but the names match how the
slots are really used. This is a purely mechanical renaming, but some
of the code makes a lot more sense now.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144503
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Craig Topper [Sun, 13 Nov 2011 17:31:07 +0000 (17:31 +0000)]
Add BLSI, BLSMSK, and BLSR to getTargetNodeName.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144502
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Chandler Carruth [Sun, 13 Nov 2011 12:17:28 +0000 (12:17 +0000)]
Teach MBP to force-merge layout successors for blocks with unanalyzable
branches that also may involve fallthrough. In the case of blocks with
no fallthrough, we can still re-order the blocks profitably. For example
instruction decoding will in some cases continue past an indirect jump,
making laying out its most likely successor there profitable.
Note, no test case. I don't know how to write a test case that exercises
this logic, but it matches the described desired semantics in
discussions with Jakob and others. If anyone has a nice example of IR
that will trigger this, that would be lovely.
Also note, there are still assertion failures in real world code with
this. I'm digging into those next, now that I know this isn't the cause.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144499
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Chandler Carruth [Sun, 13 Nov 2011 11:42:26 +0000 (11:42 +0000)]
Hoist another gross nested loop into a helper method.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144498
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Chandler Carruth [Sun, 13 Nov 2011 11:34:55 +0000 (11:34 +0000)]
Add a missing doxygen comment for a helper method.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144497
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Chandler Carruth [Sun, 13 Nov 2011 11:34:53 +0000 (11:34 +0000)]
Hoist a nested loop into its own method.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144496
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Chandler Carruth [Sun, 13 Nov 2011 11:20:44 +0000 (11:20 +0000)]
Rewrite #3 of machine block placement. This is based somewhat on the
second algorithm, but only loosely. It is more heavily based on the last
discussion I had with Andy. It continues to walk from the inner-most
loop outward, but there is a key difference. With this algorithm we
ensure that as we visit each loop, the entire loop is merged into
a single chain. At the end, the entire function is treated as a "loop",
and merged into a single chain. This chain forms the desired sequence of
blocks within the function. Switching to a single algorithm removes my
biggest problem with the previous approaches -- they had different
behavior depending on which system triggered the layout. Now there is
exactly one algorithm and one basis for the decision making.
The other key difference is how the chain is formed. This is based
heavily on the idea Andy mentioned of keeping a worklist of blocks that
are viable layout successors based on the CFG. Having this set allows us
to consistently select the best layout successor for each block. It is
expensive though.
The code here remains very rough. There is a lot that needs to be done
to clean up the code, and to make the runtime cost of this pass much
lower. Very much WIP, but this was a giant chunk of code and I'd rather
folks see it sooner than later. Everything remains behind a flag of
course.
I've added a couple of tests to exercise the issues that this iteration
was motivated by: loop structure preservation. I've also fixed one test
that was exhibiting the broken behavior of the previous version.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144495
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Chad Rosier [Sun, 13 Nov 2011 09:44:21 +0000 (09:44 +0000)]
The order in which the predicate is added differs between Thumb and ARM mode. Fix predicate when in ARM mode and restore SelectIntrinsicCall.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144494
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Chad Rosier [Sun, 13 Nov 2011 05:14:43 +0000 (05:14 +0000)]
Temporarily disable SelectIntrinsicCall when in ARM mode. This is causing failures.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144492
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Chad Rosier [Sun, 13 Nov 2011 04:25:02 +0000 (04:25 +0000)]
Fix comments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144490
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Chad Rosier [Sun, 13 Nov 2011 02:23:59 +0000 (02:23 +0000)]
Add support for emitting both signed- and zero-extend loads. Fix
SimplifyAddress to handle either a 12-bit unsigned offset or the ARM +/-imm8
offsets (addressing mode 3). This enables a load followed by an integer
extend to be folded into a single load.
For example:
ldrb r1, [r0] ldrb r1, [r0]
uxtb r2, r1 =>
mov r3, r2 mov r3, r1
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144488
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NAKAMURA Takumi [Sun, 13 Nov 2011 01:33:10 +0000 (01:33 +0000)]
Prune more RALinScan. RALinScan was also here!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144487
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Jakob Stoklund Olesen [Sun, 13 Nov 2011 01:23:34 +0000 (01:23 +0000)]
More dead code elimination in VirtRegMap.
This thing is looking a lot like a virtual register map now.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144486
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Jakob Stoklund Olesen [Sun, 13 Nov 2011 01:23:30 +0000 (01:23 +0000)]
Stop tracking spill slot uses in VirtRegMap.
Nobody cared, StackSlotColoring scans the instructions to find used stack
slots.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144485
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Jakob Stoklund Olesen [Sun, 13 Nov 2011 01:02:04 +0000 (01:02 +0000)]
Remove dead code and data from VirtRegMap.
Most of this stuff was supporting the old deferred spill code insertion
mechanism. Modern spillers just edit machine code in place.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144484
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Jakob Stoklund Olesen [Sun, 13 Nov 2011 00:39:45 +0000 (00:39 +0000)]
Stop tracking unused registers in VirtRegMap.
The information was only used by the register allocator in
StackSlotColoring.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144482
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Jakob Stoklund Olesen [Sun, 13 Nov 2011 00:31:23 +0000 (00:31 +0000)]
Remove the -color-ss-with-regs option.
It was off by default.
The new register allocators don't have the problems that made it
necessary to reallocate registers during stack slot coloring.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144481
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Jakob Stoklund Olesen [Sun, 13 Nov 2011 00:16:01 +0000 (00:16 +0000)]
Delete VirtRegRewriter.
And there was much rejoicing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144480
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Jakob Stoklund Olesen [Sun, 13 Nov 2011 00:02:24 +0000 (00:02 +0000)]
Switch PBQP to VRM's trivial rewriter.
The very complicated VirtRegRewriter is going away.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144479
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Jakob Stoklund Olesen [Sat, 12 Nov 2011 23:57:05 +0000 (23:57 +0000)]
Delete the old spilling framework from LiveIntervalAnalysis.
This is dead code, all register allocators use InlineSpiller.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144478
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Jakob Stoklund Olesen [Sat, 12 Nov 2011 23:29:02 +0000 (23:29 +0000)]
Delete the 'standard' spiller with used the old spilling framework.
The current register allocators all use the inline spiller.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144477
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Jakob Stoklund Olesen [Sat, 12 Nov 2011 23:17:52 +0000 (23:17 +0000)]
Switch PBQP to the modern InlineSpiller framework.
It is worth noting that the old spiller would split live ranges around
basic blocks. The new spiller doesn't do that.
PBQP should do its own live range splitting with
SplitEditor::splitSingleBlock() if desired. See
RAGreedy::tryBlockSplit().
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144476
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Jakob Stoklund Olesen [Sat, 12 Nov 2011 22:39:45 +0000 (22:39 +0000)]
Delete the linear scan register allocator.
RegAllocGreedy has been the default for six months now.
Deleting RegAllocLinearScan makes it possible to also delete
VirtRegRewriter and clean up the spiller code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144475
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Jakob Stoklund Olesen [Sat, 12 Nov 2011 22:39:40 +0000 (22:39 +0000)]
Remove histogram tests.
Counting the number of occurences of each opcode is not a useful test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144474
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Jakob Stoklund Olesen [Sat, 12 Nov 2011 22:39:37 +0000 (22:39 +0000)]
RAGreedy is better about hinting now.
Or maybe we are just getting lucky.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144473
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Jakob Stoklund Olesen [Sat, 12 Nov 2011 22:39:34 +0000 (22:39 +0000)]
Linear scan is going away.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144472
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Jakob Stoklund Olesen [Sat, 12 Nov 2011 22:39:30 +0000 (22:39 +0000)]
XFAIL test that depends on linear scan to remove dead code.
Filed PR11364 to track the problem. Should the register allocator
eliminate dead code?
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144471
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Jakob Stoklund Olesen [Sat, 12 Nov 2011 22:39:27 +0000 (22:39 +0000)]
Remove obsolete test.
This test was committed with a bugfix to RemoveCopyByCommutingDef, but
that optimization is no longer triggered by this test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144470
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Jakob Stoklund Olesen [Sat, 12 Nov 2011 22:39:24 +0000 (22:39 +0000)]
Remove obsolete test.
This test is for a very specific LocalRewriter bug. LocalRewriter is
going away.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144469
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Jakob Stoklund Olesen [Sat, 12 Nov 2011 20:37:57 +0000 (20:37 +0000)]
Remove obsolete test.
I don't think this test does what is was supposed to do, and
LocalRewriter is going away anyway.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144463
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Jakob Stoklund Olesen [Sat, 12 Nov 2011 20:35:26 +0000 (20:35 +0000)]
Eliminate more linear scan tests.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144462
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Jakob Stoklund Olesen [Sat, 12 Nov 2011 20:11:04 +0000 (20:11 +0000)]
Switch a couple -O0 tests to RABasic.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144461
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Jakob Stoklund Olesen [Sat, 12 Nov 2011 19:53:52 +0000 (19:53 +0000)]
Switch a few tests off linearscan.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144460
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Jakob Stoklund Olesen [Sat, 12 Nov 2011 19:53:48 +0000 (19:53 +0000)]
Delete old test of a VirtRegRewriter feature.
This test doesn't expose the issue with RAGreedy.
I filed PR11363 to track the missing InlineSpiller feature.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144459
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Jakob Stoklund Olesen [Sat, 12 Nov 2011 19:53:45 +0000 (19:53 +0000)]
Remove old test that doesn't make sense.
The test is checking that the output doesn't contains any 'mov '
strings. It does contain movl, though.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144458
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Craig Topper [Sat, 12 Nov 2011 09:58:49 +0000 (09:58 +0000)]
Add more AVX2 shift lowering support. Move AVX2 variable shift to use patterns instead of custom lowering code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144457
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Nick Lewycky [Sat, 12 Nov 2011 03:09:12 +0000 (03:09 +0000)]
Don't try to loop on iterators that are potentially invalidated inside the loop. Fixes PR11361!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144454
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Akira Hatanaka [Sat, 12 Nov 2011 02:38:12 +0000 (02:38 +0000)]
Fix typo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144453
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