[weak vtables] Remove a bunch of weak vtables

This patch removes most of the trivial cases of weak vtables by pinning them to
a single object file. The memory leaks in this version have been fixed.

[weak vtables] Remove a bunch of weak vtables

This patch removes most of the trivial cases of weak vtables by pinning them to
a single object file. The memory leaks in this version have been fixed. Thanks
Alexey for pointing them out.

Differential Revision: http://llvm-reviews.chandlerc.com/D2068

Reviewed by Andy

llvm-svn: 195064

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Revert r194865 and r194874.

This change is incorrect. If you delete virtual destructor of both a base class
and a subclass, then the following code:
Base *foo = new Child();
delete foo;
will not

Revert r194865 and r194874.

This change is incorrect. If you delete virtual destructor of both a base class
and a subclass, then the following code:
Base *foo = new Child();
delete foo;
will not cause the destructor for members of Child class. As a result, I observe
plently of memory leaks. Notable examples I investigated are:
ObjectBuffer and ObjectBufferStream, AttributeImpl and StringSAttributeImpl.

llvm-svn: 194997

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[weak vtables] Remove a bunch of weak vtables

This patch removes most of the trivial cases of weak vtables by pinning them to
a single object file.

Differential Revision: http://llvm-reviews.chandl

[weak vtables] Remove a bunch of weak vtables

This patch removes most of the trivial cases of weak vtables by pinning them to
a single object file.

Differential Revision: http://llvm-reviews.chandlerc.com/D2068

Reviewed by Andy

llvm-svn: 194865

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Pass LiveQueryResult by value

This makes the API a bit more natural to use and makes it easier to make
LiveRanges implementation details private.

llvm-svn: 192394

Comment typo.

llvm-svn: 191312

Allow subtarget selection of the default MachineScheduler and document the interface.

The global registry is used to allow command line override of the
scheduler selection, but does not work well as

Allow subtarget selection of the default MachineScheduler and document the interface.

The global registry is used to allow command line override of the
scheduler selection, but does not work well as the normal selection
API. For example, the same LLVM process should be able to target
multiple targets or subtargets.

llvm-svn: 191071

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Rename ConvergingScheduler to GenericScheduler.

This was an experimental scheduler a year ago. It's now used by
several subtargets, both in-order and out-of-order, and it
is about to be enabled by d

Rename ConvergingScheduler to GenericScheduler.

This was an experimental scheduler a year ago. It's now used by
several subtargets, both in-order and out-of-order, and it
is about to be enabled by default for x86 and armv7. It will be the
new GenericScheduler for subtargets that don't provide their own
SchedulingStrategy.

llvm-svn: 191051

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Enable -misched-cyclicpath by default.

llvm-svn: 190367

mi-sched: smooth out the cyclicpath heuristic.

Arnold's idea.

I generally try to avoid stateful heuristics because it can make
debugging harder. However, we need a way to prevent the latency
priori

mi-sched: smooth out the cyclicpath heuristic.

Arnold's idea.

I generally try to avoid stateful heuristics because it can make
debugging harder. However, we need a way to prevent the latency
priority from dominating, and it somewhat makes sense to schedule
aggressively for latency only within an issue group.

Swift in particular likes this, and it doesn't hurt anyone else:
| Benchmarks/MiBench/consumer-lame | 10.39% |
| Benchmarks/Misc/himenobmtxpa | 9.63% |

llvm-svn: 190360

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mi-sched: cleanup register pressure update, remove a FIXME.

llvm-svn: 190181

mi-sched: improve regpressure tracing.

llvm-svn: 190180

mi-sched: print tree size in -view-misched-dags

llvm-svn: 190179

mi-sched: register pressure update tracing.

llvm-svn: 190178

mi-sched: Reorder Cyclicpath (latency) and CriticalMax (pressure) heuristics.

The latency based scheduling could induce spills in some cases.

llvm-svn: 190177

Added MachineSchedPolicy.

Allow subtargets to customize the generic scheduling strategy.
This is convenient for targets that don't need to add new heuristics
by specializing the strategy.

llvm-svn:

Added MachineSchedPolicy.

Allow subtargets to customize the generic scheduling strategy.
This is convenient for targets that don't need to add new heuristics
by specializing the strategy.

llvm-svn: 190176

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mi-sched: Force bottom up scheduling for generic targets.

Fast register pressure tracking currently only takes effect during
bottom up scheduling. Forcing this is a bit faster and simpler for
target

mi-sched: Force bottom up scheduling for generic targets.

Fast register pressure tracking currently only takes effect during
bottom up scheduling. Forcing this is a bit faster and simpler for
targets that don't have many scheduling constraints and don't need
top-down scheduling.

llvm-svn: 190014

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comment typo

llvm-svn: 189997

Remove dead subtree limit code.

llvm-svn: 189995

-view-misched-dags, better pruning.

llvm-svn: 189994

mi-sched: DEBUG cleanup, call tracePick for unidirectional scheduling.

llvm-svn: 189993

80 columns

llvm-svn: 189992

mi-sched: Suppress register pressure tracking when the scheduling window is too small.

If the instruction window is < NumRegs/2, pressure tracking is not
likely to be effective. The scheduler has to

mi-sched: Suppress register pressure tracking when the scheduling window is too small.

If the instruction window is < NumRegs/2, pressure tracking is not
likely to be effective. The scheduler has to process a very large
number of tiny blocks. We want this to be fast.

llvm-svn: 189991

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mi-sched: Load clustering is a bit to expensive to enable unconditionally.

llvm-svn: 189990

mi-sched: Reuse an invalid HazardRecognizer to save compile time.

llvm-svn: 189989

mi-sched: bypass heuristic checks when regpressure tracking is disabled.

llvm-svn: 189988