| b20b518f800293ea6b2bed04134c71293ac52403 |
|
12-Jan-2012 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Make SplitAnalysis::UseSlots private.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148031 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 74c4f97a466513e45e66e04469973fdcd5865300 |
|
11-Jan-2012 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Exclusively use SplitAnalysis::getLastSplitPoint().
Delete the alternative implementation in LiveIntervalAnalysis.
These functions computed the same thing, but SplitAnalysis caches the
result.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147911 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| c4c633852fbb8ab9ef2679b679d2862746d2fa3e |
|
14-Sep-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Hoist back-copies to the least busy dominator.
When a back-copy is hoisted to the nearest common dominator, keep
looking up the dominator tree for a less loopy dominator, and place the
back-copy there instead.
Don't do this when a single existing back-copy dominates all the others.
Assume the client knows what he is doing, and keep the dominating
back-copy.
This prevents us from hoisting back-copies into loops in most cases. If
a value is defined in a loop with multiple exits, we may still hoist
back-copies into that loop. That is the speed/size tradeoff.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139698 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 393bfcb263fa46e4badc73c6aa56306986f94dcf |
|
14-Sep-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Distinguish complex mapped values from forced recomputation.
When a ParentVNI maps to multiple defs in a new interval, its live range
may still be derived directly from RegAssign by transferValues().
On the other hand, when instructions have been rematerialized or
hoisted, it may be necessary to completely recompute live ranges using
LiveRangeCalc::extend() to all uses.
Use a bit in the value map to indicate that a live range must be
recomputed. Rename markComplexMapped() to forceRecompute().
This fixes some live range verification errors when
-split-spill-mode=size hoists back-copies by recomputing source ranges
when RegAssign kills can't be moved.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139660 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| b21abfed813fa46976f896439ca2f9fbd2eba9ba |
|
14-Sep-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Implement -split-spill-mode=size.
Whenever the complement interval is defined by multiple copies of the
same value, hoist those back-copies to the nearest common dominator.
This ensures that at most one copy is inserted per value in the
complement inteval, and no phi-defs are needed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139651 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| e5a2e366322ef5f0d597b1fb8dbf55f2cf36cf15 |
|
13-Sep-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Add SplitEditor::markOverlappedComplement().
This function is used to flag values where the complement interval may
overlap other intervals. Call it from overlapIntv, and use the flag to
fully recompute those live ranges in transferValues().
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139612 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| abcc73e8ba3131c7c4f198840ece31453a0101ac |
|
13-Sep-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Eliminate the extendRange() wrapper.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139608 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| c1c622ef0dd29d1bafd580790aec5231af50abf2 |
|
13-Sep-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Use a separate LiveRangeCalc for the complement in spill modes.
The complement interval may overlap the other intervals created, so use
a separate LiveRangeCalc instance to compute its live range.
A LiveRangeCalc instance can only be shared among non-overlapping
intervals.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139603 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| b5a457c4cbc71db6ae313ef1bf8eadac65767ab0 |
|
13-Sep-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Extract live range calculations from SplitKit.
SplitKit will soon need two copies of these data structures, and the
algorithms will also be useful when LiveIntervalAnalysis becomes
independent of LiveVariables.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139572 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 708d06f7fb5dfd9c8559aea07b042a88c65645f8 |
|
12-Sep-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Add an interface for SplitKit complement spill modes.
SplitKit always computes a complement live range to cover the places
where the original live range was live, but no explicit region has been
allocated.
Currently, the complement live range is created to be as small as
possible - it never overlaps any of the regions. This minimizes
register pressure, but if the complement is going to be spilled anyway,
that is not very important. The spiller will eliminate redundant
spills, and hoist others by making the spill slot live range overlap
some of the regions created by splitting. Stack slots are cheap.
This patch adds the interface to enable spill modes in SplitKit. In
spill mode, SplitKit will assume that the complement is going to spill,
so it will allow it to overlap regions in order to avoid back-copies.
By doing some of the spiller's work early, the complement live range
becomes simpler. In some cases, it can become much simpler because no
extra PHI-defs are required. This will speed up both splitting and
spilling.
This is only the interface to enable spill modes, no implementation yet.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139500 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 3d4ec14ffc6b957b9418578567a5751ef6f80fdb |
|
12-Sep-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Update comments to reflect some (not so) recent changes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139498 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 75e28f74b051e72ca3fc1aa38e5e43a5204a65ce |
|
06-Aug-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Delete getMultiUseBlocks and splitSingleBlocks.
These functions are no longer used, and they are easily replaced with a
loop calling shouldSplitSingleBlock and splitSingleBlock.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136993 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 2d6d86be84ee355223ccd20b7f87a0c9971c50c9 |
|
06-Aug-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Split around single instructions to enable register class inflation.
Normally, we don't create a live range for a single instruction in a
basic block, the spiller does that anyway. However, when splitting a
live range that belongs to a proper register sub-class, inserting these
extra COPY instructions completely remove the constraints from the
remainder interval, and it may be allocated from the larger super-class.
The spiller will mop up these small live ranges if we end up spilling
anyway. It calls them snippets.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136989 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| fe62d92b7bbaf73e576bec0c0b11cfa6c191aa87 |
|
03-Aug-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Rename {First,Last}Use to {First,Last}Instr.
With a 'FirstDef' field right there, it is very confusing that FirstUse
refers to an instruction that may be a def.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136739 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 77ee1140a3297e6fbd6cb7cf586872af6d00d07e |
|
03-Aug-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Add a BlockInfo::FirstDef field.
This is either an invalid SlotIndex, or valno->def for the first value
defined inside the block. PHI values are not counted as defined inside
the block.
The FirstDef field will be used when estimating the cost of spilling
around a block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136736 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 4751eb760e7f4e51cfd594cbe46c7d0d7865d693 |
|
03-Aug-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Delete BlockInfo::LiveThrough. It wasn't used any more.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136735 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| b4ddedce599183362b0f0333922c2fe0e163a129 |
|
15-Jul-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Extract parts of RAGreedy::splitAroundRegion as SplitKit methods.
This gets rid of some of the gory splitting details in RAGreedy and
makes them available to future SplitKit clients.
Slightly generalize the functionality to support multi-way splitting.
Specifically, SplitEditor::splitLiveThroughBlock() supports switching
between different register intervals in a block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135307 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 87360f73ae205854f100ba5fb7eef7b90ac3bc27 |
|
30-Jun-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Reapply r134047 now that the world is ready for it.
This patch will sometimes choose live range split points next to
interference instead of always splitting next to a register point. That
means spill code can now appear almost anywhere, and it was necessary
to fix code that didn't expect that.
The difficult places were:
- Between a CALL returning a value on the x87 stack and the
corresponding FpPOP_RETVAL (was FpGET_ST0). Probably also near x87
inline assembly, but that didn't actually show up in testing.
- Between a CALL popping arguments off the stack and the corresponding
ADJCALLSTACKUP.
Both are fixed now. The only place spill code can't appear is after
terminators, see SplitAnalysis::getLastSplitPoint.
Original commit message:
Rewrite RAGreedy::splitAroundRegion, now with cool ASCII art.
This function has to deal with a lot of special cases, and the old
version got it wrong sometimes. In particular, it would sometimes leave
multiple uses in the stack interval in a single block. That causes bad
code with multiple reloads in the same basic block.
The new version handles block entry and exit in a single pass. It first
eliminates all the easy cases, and then goes on to create a local
interval for the blocks with difficult interference. Previously, we
would only create the local interval for completely isolated blocks.
It can happen that the stack interval becomes completely empty because
we could allocate a register in all edge bundles, and the new local
intervals deal with the interference. The empty stack interval is
harmless, but we need to remove a SplitKit assertion that checks for
empty intervals.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134125 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 2c0cbce763a258ac58590a8ca3c28ff722093fef |
|
29-Jun-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Revert r134047 while investigating a llvm-gcc-i386-linux-selfhost
miscompile.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134053 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 4d517e34e5c8431adb724c94a14b02362a9cfe67 |
|
29-Jun-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Rewrite RAGreedy::splitAroundRegion, now with cool ASCII art.
This function has to deal with a lot of special cases, and the old
version got it wrong sometimes. In particular, it would sometimes leave
multiple uses in the stack interval in a single block. That causes bad
code with multiple reloads in the same basic block.
The new version handles block entry and exit in a single pass. It first
eliminates all the easy cases, and then goes on to create a local
interval for the blocks with difficult interference. Previously, we
would only create the local interval for completely isolated blocks.
It can happen that the stack interval becomes completely empty because
we could allocate a register in all edge bundles, and the new local
intervals deal with the interference. The empty stack interval is
harmless, but we need to remove a SplitKit assertion that checks for
empty intervals.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134047 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| a2e79ef908e0f4179cda9e85e2f75057181bf321 |
|
30-May-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Reapply r132245 with a fix for the bug that broke the darwin9/i386 build.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132309 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 626d6fb1903e74337b257c5e165944bcd1273e65 |
|
29-May-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Revert r132245, "Create two BlockInfo entries when a live range is discontinuous through a block."
This commit seems to have broken a darwin 9 tester.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132299 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| c9cf9e94ec4daca659e2eb4e30d3f7d7f9b6b067 |
|
28-May-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Create two BlockInfo entries when a live range is discontinuous through a block.
Delete the Kill and Def markers in BlockInfo. They are no longer
necessary when BlockInfo describes a continuous live range.
This only affects the relatively rare kind of basic block where a live
range looks like this:
|---x o---|
Now live range splitting can pretend that it is looking at two blocks:
|---x
o---|
This allows the code to be simplified a bit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132245 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| b2abfa0bf30edf292a27a06e091d03983e644c9b |
|
28-May-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Add SplitAnalysis::getNumLiveBlocks().
It is important that this function returns the same number of live blocks as
countLiveBlocks(CurLI) because live range splitting uses the number of live
blocks to ensure it is making progress.
This is in preparation of supporting duplicate UseBlock entries for basic blocks
that have a virtual register live-in and live-out, but not live-though.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132244 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 7d6b6a05b549da70b4473f015c97954c2a422724 |
|
03-May-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Gracefully handle invalid live ranges. Fix PR9831.
Register coalescing can sometimes create live ranges that end in the middle of a
basic block without any killing instruction. When SplitKit detects this, it will
repair the live range by shrinking it to its uses.
Live range splitting also needs to know about this. When the range shrinks so
much that it becomes allocatable, live range splitting fails because it can't
find a good split point. It is paranoid about making progress, so an allocatable
range is considered an error.
The coalescer should really not be creating these bad live ranges. They appear
when coalescing dead copies.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130787 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 9f4b893b84d9c2b56aa2abc3c96ce1e5ccc465e5 |
|
27-Apr-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Add a safe-guard against repeated splitting for some rare cases.
The number of blocks covered by a live range must be strictly decreasing when
splitting, otherwise we can't allow repeated splitting.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130249 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 6796e4fc889d99c4ad97ec5ad86e4c8cf75e52a4 |
|
24-Apr-2011 |
Sebastian Redl <sebastian.redl@getdesigned.at> |
Give SplitKit.h a header guard.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130095 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 5928046306d8bbe7db35707c294689f515f90e56 |
|
21-Apr-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Allow allocatable ranges from global live range splitting to be split again.
These intervals are allocatable immediately after splitting, but they may be
evicted because of later splitting. This is rare, but when it happens they
should be split again.
The remainder intervals that cannot be allocated after splitting still move
directly to spilling.
SplitEditor::finish can optionally provide a mapping from new live intervals
back to the original interval indexes returned by openIntv().
Each original interval index can map to multiple new intervals after connected
components have been separated. Dead code elimination may also add existing
intervals to the list.
The reverse mapping allows the SplitEditor client to treat the new intervals
differently depending on the split region they came from.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129925 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 44b7ae2355a32035ea286555736d173755a1c5e2 |
|
15-Apr-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Teach the SplitKit blitter to handle multiply defined values as well.
The transferValues() function can now handle both singly and multiply defined
values, as long as the resulting live range is known. Only rematerialized values
have their live range recomputed by extendRange().
The updateSSA() function can now insert PHI values in bulk across multiple
values in multiple target registers in one pass. The list of blocks received
from transferValues() is in layout order which seems to work well for the
iterative algorithm. Blocks from extendRange() are still in reverse BFS order,
but this function is used so rarely now that it doesn't matter.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129580 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| fd1cced726469e83915f428877a521ba737d35f3 |
|
13-Apr-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Stop using dead function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129442 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 5db4289e404d76664f8aabe2675a4cc2d7b0e98e |
|
12-Apr-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
SparseBitVector is SLOW.
Use a Bitvector instead, we didn't need the smaller memory footprint anyway.
This makes the greedy register allocator 10% faster.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129390 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| fd5c51342a429ecab86a645282d0b36b216c0256 |
|
12-Apr-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Create new intervals for isolated blocks during region splitting.
This merges the behavior of splitSingleBlocks into splitAroundRegion, so the
RS_Region and RS_Block register stages can be coalesced. That means the leftover
intervals after region splitting go directly to spilling instead of a second
pass of per-block splitting.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129379 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| e1b43c3b4000ee7201fcac8d1c8e75bb9fb547e3 |
|
12-Apr-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Add SplitKit API to query and select the current interval being worked on.
This makes it possible to target multiple registers in one pass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129374 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| f4afdfc501b7185d24a0ef184fe3d0c0bbe22e0c |
|
09-Apr-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Build the Hopfield network incrementally when splitting global live ranges.
It is common for large live ranges to have few basic blocks with register uses
and many live-through blocks without any uses. This approach grows the Hopfield
network incrementally around the use blocks, completely avoiding checking
interference for some through blocks.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129188 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| db529a8a5d071610f3a8b467693bc40b073e68ef |
|
06-Apr-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Analyze blocks with uses separately from live-through blocks without uses.
About 90% of the relevant blocks are live-through without uses, and the only
information required about them is their number. This saves memory and enables
later optimizations that need to look at only the use-blocks.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128985 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| a2948ef5accab638371615f539ea9f9ec5ff5d03 |
|
05-Apr-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Use std::unique instead of a SmallPtrSet to ensure unique instructions in UseSlots.
This allows us to always keep the smaller slot for an instruction which is what
we want when a register has early clobber defines.
Drop the UsingInstrs set and the UsingBlocks map. They are no longer needed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128886 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 612f7807c581eafb7c8105e1a55c8d839033bfb3 |
|
05-Apr-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Stop precomputing last split points, query the SplitAnalysis cache on demand.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128875 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 1a7744501a80351ce31fcecad42c8e35823bc081 |
|
05-Apr-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Cache the fairly expensive last split point computation and provide a fast
inlined path for the common case.
Most basic blocks don't contain a call that may throw, so the last split point
os simply the first terminator.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128874 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 6c8afd728eb02742ce320ecd39bcf3774d8423b7 |
|
04-Apr-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Stop caching basic block index ranges now that SlotIndexes can keep up.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128821 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 5c4c4d4b82a658643c8daefd5cc76d5c712285ed |
|
04-Apr-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Delete leftover data members.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128820 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 2254227791ea267426b9ac674fc6d87decb65bc1 |
|
17-Mar-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Rewrite instructions as part of ConnectedVNInfoEqClasses::Distribute.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127779 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 5881799d0cccbd814ec1b0f0509df9be1f63c6cb |
|
08-Mar-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Delete dead code after rematerializing.
LiveRangeEdit::eliminateDeadDefs() will eventually be used by coalescing,
splitting, and spilling for dead code elimination. It can delete chains of dead
instructions as long as there are no dependency loops.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127287 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 2b0f9e73d8623b21fc14335ef6208deab2629cdf |
|
05-Mar-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Work around a coalescer bug.
The coalescer can in very rare cases leave too large live intervals around after
rematerializing cheap-as-a-move instructions.
Linear scan doesn't really care, but live range splitting gets very confused
when a live range is killed by a ghost instruction.
I will fix this properly in the coalescer after 2.9 branches.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127096 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 13ba2dab631636e525a44bb259aaea56a860d1c7 |
|
04-Mar-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Use an IndexedMap instead of a DenseMap for the live-out cache.
This speeds up updateSSA() so it only accounts for 5% of the live range
splitting time.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126972 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 36d61863bc83bd2301e0224adc560098b35ec0dc |
|
03-Mar-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Cache basic block bounds instead of asking SlotIndexes::getMBBRange all the time.
This speeds up the greedy register allocator by 15%.
DenseMap is not as fast as one might hope.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126921 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| bece06f0c6936527e2b1c72d09f7d3a949af9a47 |
|
03-Mar-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Change the SplitEditor interface to a single instance can be shared for multiple splits.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126912 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| a2cae58411b36a58f658f9402e8d039add31ae4d |
|
03-Mar-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Turn the Edit member into a pointer so it can change dynamically.
No functional change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126898 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 4670353a21fbc6e8159a129cda965f256e73a451 |
|
03-Mar-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Transfer simply defined values directly without recomputing liveness and SSA.
Values that map to a single new value in a new interval after splitting don't
need new PHIDefs, and if the parent value was never rematerialized the live
range will be the same.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126894 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| e2dc0c978e2435dbbb55cb7fca7750034c3e292a |
|
03-Mar-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Extract a method. No functional change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126893 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 1c38ba6355a019b7fc3baa0d0ab31e8ba11f7db1 |
|
02-Mar-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Move extendRange() into SplitEditor and delete the LiveRangeMap class.
Extract the updateSSA() method from the too long extendRange().
LiveOutCache can be shared among all the new intervals since there is at most
one of the new ranges live out from each basic block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126818 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| d3fdaeb69a25bcd21914b80f75606e2c2f1b35c8 |
|
02-Mar-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Rename mapValue to extendRange because that is its function now.
Simplify the signature - The return value and ParentVNI are no longer needed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126809 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 9763e2bf39b84f18bd464b0cda61fe1cd98dcaae |
|
02-Mar-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Move LiveIntervalMap::extendTo into LiveInterval itself.
This method could probably be used by LiveIntervalAnalysis::shrinkToUses, and
now it can use extendIntervalEndTo() which coalesces ranges.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126803 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| edb87555e466e781087e18936f427816c952f3e7 |
|
02-Mar-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Delete dead code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126801 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 670ccd18ae1ecec3b3c92885d5b64b21859001c4 |
|
02-Mar-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Move the value map from LiveIntervalMap to SplitEditor.
The value map is currently not used, all values are 'complex mapped' and
LiveIntervalMap::mapValue is used to dig them out.
This is the first step in a series changes leading to the removal of
LiveIntervalMap. Its data structures can be shared among all the live intervals
created by a split, so it is wasteful to create a copy for each.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126800 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 3afab9c57e1afb0b7a4a9fe25a74117461bc0e69 |
|
02-Mar-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Delete dead code.
Local live range splitting is better driven by interference. This code was just
guessing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126799 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 06c0f25499fd502668ca720b0fea4a4dfe6eb44a |
|
22-Feb-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Add SplitKit::isOriginalEndpoint and use it to force live range splitting to terminate.
An original endpoint is an instruction that killed or defined the original live
range before any live ranges were split.
When splitting global live ranges, avoid creating local live ranges without any
original endpoints. We may still create global live ranges without original
endpoints, but such a range won't be split again, and live range splitting still
terminates.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126151 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 1b847deb26b52051de39f4cbecd224c9fbd0d1c2 |
|
19-Feb-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Give SplitAnalysis a VRM member to access VirtRegMap::getOriginal().
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126005 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 0eeca440469e23f2db2bea3d7b136f0f95f6ff1d |
|
19-Feb-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Missed member rename for naming convention.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126003 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 034a80d065358b412cdd270e08fb6f1986e65e50 |
|
17-Feb-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Split local live ranges.
A local live range is live in a single basic block. If such a range fails to
allocate, try to find a sub-range that would get a larger spill weight than its
interference.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125764 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 4f5c9d206139f946ae4bb5ee7e3ddb1714057cdb |
|
10-Feb-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Delete unused code for analyzing and splitting around loops.
Loop splitting is better handled by the more generic global region splitting
based on the edge bundle graph.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125243 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 9b057771ba22441b8d312404204433477b4be657 |
|
10-Feb-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Use the LiveBLocks array for SplitEditor::splitSingleBlocks() as well.
This fixes a bug where splitSingleBlocks() could split a live range after a
terminator instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125237 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| f0ac26c51173a9a1d6e5b5794107dccc4c5b5792 |
|
09-Feb-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Move calcLiveBlockInfo() and the BlockInfo struct into SplitAnalysis.
No functional changes intended.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125231 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 5c716bdccce2fa504e1aa0b67226165d181d2459 |
|
08-Feb-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Add SplitEditor::overlapIntv() to create small ranges where both registers are live.
If a live range is used by a terminator instruction, and that live range needs
to leave the block on the stack or in a different register, it can be necessary
to have both sides of the split live at the terminator instruction.
Example:
%vreg2 = COPY %vreg1
JMP %vreg1
Becomes after spilling %vreg2:
SPILL %vreg1
JMP %vreg1
The spill doesn't kill the register as is normally the case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125102 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 207c868c9210663d401b7f5ce5cae7c3e0943849 |
|
03-Feb-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Return live range end points from SplitEditor::enter*/leave*.
These end points come from the inserted copies, and can be passed directly to
useIntv. This simplifies the coloring code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124799 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 0f43811903f10394f7088f4634c0b4f9668cbac0 |
|
03-Feb-2011 |
Eric Christopher <echristo@apple.com> |
Reapply this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124779 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 463a2977b1d9e6679f859db9f32e9e783b075c10 |
|
03-Feb-2011 |
Eric Christopher <echristo@apple.com> |
Temporarily revert 124765 in an attempt to find the cycle breaking bootstrap.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124778 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 2cd21119593becfa1962cfaca0319fd67913f545 |
|
03-Feb-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Defer SplitKit value mapping until all defs are available.
The greedy register allocator revealed some problems with the value mapping in
SplitKit. We would sometimes start mapping values before all defs were known,
and that could change a value from a simple 1-1 mapping to a multi-def mapping
that requires ssa update.
The new approach collects all defs and register assignments first without
filling in any live intervals. Only when finish() is called, do we compute
liveness and mapped values. At this time we know with certainty which values map
to multiple values in a split range.
This also has the advantage that we can compute live ranges based on the
remaining uses after rematerializing at split points.
The current implementation has many opportunities for compile time optimization.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124765 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 078628465b73348b5608ec6aa2d7181679543903 |
|
26-Jan-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Rename member variables to follow the rest of LLVM.
No functional change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124257 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| d7ca57705e7ccc19245b8b3d6fc271562366bf92 |
|
20-Jan-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Add LiveIntervalMap::dumpCache() to print out the cache used by the ssa update algorithm.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123925 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| b5fa9333431673aac2ced8dea80152349a85cf6f |
|
18-Jan-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Add RAGreedy methods for splitting live ranges around regions.
Analyze the live range's behavior entering and leaving basic blocks. Compute an
interference pattern for each allocation candidate, and use SpillPlacement to
find an optimal region where that register can be live.
This code is still not enabled.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123774 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 8dd070edc2209ecfdae49780ec1596b349e2cbd1 |
|
04-Jan-2011 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Turn the EdgeBundles class into a stand-alone machine CFG analysis pass.
The analysis will be needed by both the greedy register allocator and the
X86FloatingPoint pass. It only needs to be computed once when the CFG doesn't
change.
This pass is very fast, usually showing up as 0.0% wall time.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122832 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 8d0963f72c8922bafffb36ff49b18064098a3cab |
|
21-Dec-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Add EdgeBundles to SplitKit.
Edge bundles is an annotation on the CFG that turns it into a bipartite directed
graph where each basic block is connected to an outgoing and an ingoing bundle.
These bundles are useful for identifying regions of the CFG for live range
splitting.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122301 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 697483addf056595c997302f1316cc59244eefaa |
|
15-Dec-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Detect and enumerate bypass loops.
Bypass loops have the current live range live through, but contain no uses or
defs. Splitting around a bypass loop can free registers for other uses inside
the loop by spilling the split range.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121871 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 521a453721aeefbb6783b6acc8ea36b3c18b4931 |
|
15-Dec-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Separate SplitAnalysis::getSplitLoops().
This method returns the set of loops with uses that are candidates for
splitting.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121870 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| cfa7134a9c33c0c7f8dda359c89dc6763a258e07 |
|
10-Nov-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Basic rematerialization during splitting.
Whenever splitting wants to insert a copy, it checks if the value can be
rematerialized cheaply instead.
Missing features:
- Delete instructions when all uses have been rematerialized.
- Truncate live ranges to the remaining uses after rematerialization.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118702 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 3d4114c464d1ec6c9a6088e04d2156f72c4b42ce |
|
02-Nov-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
When inserting copies during splitting, always use the parent register as the
source, and let rewrite() clean it up.
This way, kill flags on the inserted copies are fixed as well during rewrite().
We can't just assume that all the copies we insert are going to be kills since
critical edges into loop headers sometimes require both source and dest to be
live out of a block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117980 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| e1dde7b05a83438eeba4bd83f8cf080f56d22c5b |
|
28-Oct-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Replace SplitKit SSA update with an iterative algorithm very similar to the one
in SSAUpdaterImpl.h
Verifying live intervals revealed that the old method was completely wrong, and
we need an iterative approach to calculating PHI placemant. Fortunately, we have
MachineDominators available, so we don't have to compute that over and over
like SSAUpdaterImpl.h must.
Live-out values are cached between calls to mapValue() and computed in a greedy
way, so most calls will be working with very small block sets.
Thanks to Bob for explaining how this should work.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117599 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| d68f458244b9d9a6644a9550dd5cee60331c9e7d |
|
28-Oct-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Make MachineDominators available for SplitEditor. We are going to need it for
proper SSA updating.
This doesn't cause MachineDominators to be recomputed since we are already
requiring MachineLoopInfo which uses dominators as well.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117598 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| c95c1465fdba059f6cbf24d1d9fd84f442c60fe4 |
|
27-Oct-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Handle critical loop predecessors by making both inside and outside registers
live out.
This doesn't prevent us from inserting a loop preheader later on, if that is
better.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117424 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 0960a650b7047373da25bee6ec2eb73889c3b7bb |
|
27-Oct-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Compute critical loop predecessors in the same way as critical loop exits.
Critical edges going into a loop are not as bad as critical exits. We can handle
them by splitting the critical edge, or by having both inside and outside
registers live out of the predecessor.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117423 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 14e8d71cc945034d4ee6e76be00e00f14efac62f |
|
23-Oct-2010 |
Andrew Trick <atrick@apple.com> |
This is a prototype of an experimental register allocation
framework. It's purpose is not to improve register allocation per se,
but to make it easier to develop powerful live range splitting. I call
it the basic allocator because it is as simple as a global allocator
can be but provides the building blocks for sophisticated register
allocation with live range splitting.
A minimal implementation is provided that trivially spills whenever it
runs out of registers. I'm checking in now to get high-level design
and style feedback. I've only done minimal testing. The next step is
implementing a "greedy" allocation algorithm that does some register
reassignment and makes better splitting decisions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117174 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|
| 532de3dc6ea98387368954c0ac0e07b0adca8b62 |
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22-Oct-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Add print methods
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117143 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| 50cef5829dd8fcbda052c8fb702483c6212f803b |
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15-Oct-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Remove unused accessor.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116580 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| 9d5d48bc41b182a1b76b1df25069ad4fb6fc45a7 |
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15-Oct-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Eliminate curli from SplitEditor. Use the LiveRangeEdit reference instead.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116547 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| a17768f5822ab62bc18608e5ba473187bf726b84 |
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15-Oct-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Create a new LiveRangeEdit class to keep track of the new registers created when
splitting or spillling, and to help with rematerialization.
Use LiveRangeEdit in InlineSpiller and SplitKit. This will eventually make it
possible to share remat code between InlineSpiller and SplitKit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116543 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| 7466927b1af264b359c860cb9f7d1f3b275cc5cd |
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09-Oct-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Rename SplitEditor::rewrite to finish() and break it out into a couple of new
functions: computeRemainder and rewrite.
When the remainder breaks up into multiple components, remember to rewrite those
uses as well.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116121 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| fc3ef3c2e9e1a01f19aaf1e362d8d2f209c09a46 |
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06-Oct-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Remove SplitAnalysis::removeUse. It was only used to make SplitAnalysis
reusable, but that is no longer relevant since a split will always replace the
original.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115709 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| 57d0f2deb0afefe69770a28937a4363e7b1f9753 |
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06-Oct-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Update SplitEditor API to reflect the fact that the original live interval is
never kept after splitting.
Keeping the original interval made sense when the split region doesn't modify
the register, and the original is spilled. We can get the same effect by
detecting reloaded values when spilling around copies.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115695 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| fc60d7729bb5b63b7d61e370e51bd05e9a18b8bc |
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05-Oct-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Don't use nextIndex to check for live out of instruction.
Insert copy after defining instruction.
Fix LiveIntervalMap::extendTo to properly handle live segments starting before
the current basic block.
Make sure the open live range is extended to the inserted copy's use slot.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115665 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| 5fa42a45a1845046dde84089fb4d8e1e1b329b65 |
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22-Sep-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Build the complement interval dupli after the split intervals instead of
creating it before and subtracting split ranges.
This way, the SSA update code in LiveIntervalMap can properly create and use new
phi values in dupli. Now it is possible to create split regions where a value
escapes along two different CFG edges, creating phi values outside the split
region.
This is a work in progress and probably quite broken.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114492 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| f6a129a24b866635c3c51edf08749755f952b5f2 |
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16-Sep-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Use the value mapping provided by LiveIntervalMap. This simplifies the code a
great deal because we don't have to worry about maintaining SSA form.
Unconditionally copy back to dupli when the register is live out of the split
range, even if the live-out value was defined outside the range. Skipping the
back-copy only makes sense when the live range is going to spill outside the
split range, and we don't know that it will. Besides, this was a hack to avoid
SSA update issues.
Clear up some confusion about the end point of a half-open LiveRange. Methinks
LiveRanges need to be closed so both start and end are included in the range.
The low bits of a SlotIndex are symbolic, so a half-open range doesn't really
make sense. This would be a pervasive change, though.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114043 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| dd9f3fdc77b77b10710c27050d508d7c7fb40c25 |
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14-Sep-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Mechanically replace LiveInterval* with LiveIntervalMap for intervals being
edited without actually using LiveIntervalMap functionality.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113816 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| 9ca2aeb2d223d11fd01b0bb8f13fe7f3a969714d |
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14-Sep-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Allow LiveIntervalMap to be reused by resetting the current live interval.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113815 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| ff3ae8691c18c4c40d09fb21ecac880aea9a536b |
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18-Aug-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Thinking about it, we don't need MachineDominatorTree after all. The DomValue
map discovers the iterated dominance frontier for free.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111400 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| 1407c84242688dbcdbaa5b0296c18f46d102f25a |
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18-Aug-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Add the LiveIntervalMap class. Don't hook it up yet.
LiveIntervalMap maps values from a parent LiveInterval to a child interval that
is a strict subset. It will create phi-def values as needed to preserve the
VNInfo SSA form in the child interval.
This leads to an algorithm very similar to the one in SSAUpdaterImpl.h, but with
enough differences that the code can't be reused:
- We don't need to manipulate PHI instructions.
- LiveIntervals have kills.
- We have MachineDominatorTree.
- We can use df_iterator.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111393 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| 0a2b2a1497a77f1db281d4dc9f21d01fe48f6ec6 |
|
14-Aug-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Clean up the Spiller.h interface.
The earliestStart argument is entirely specific to linear scan allocation, and
can be easily calculated by RegAllocLinearScan.
Replace std::vector with SmallVector.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111055 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| fc412d85c46a8656361fe1e9197ea85922e2cd61 |
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13-Aug-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Implement splitting inside a single block.
When a live range is contained a single block, we can split it around
instruction clusters. The current approach is very primitive, splitting before
and after the largest gap between uses.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111043 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| 2dee7a527b083e259f9e826c57c1e5dab9540798 |
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13-Aug-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Update the SplitAnalysis statistics as uses are moved from curli to the new
split intervals. THis means the analysis can be used for multiple splits as long
as curli doesn't shrink.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110975 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| f1b05f2b0ef48cb80b064e2f792b38c626822fc0 |
|
12-Aug-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Implement single block splitting.
Before spilling a live range, we split it into a separate range for each basic
block where it is used. That way we only get one reload per basic block if the
new smaller ranges can allocate to a register.
This type of splitting is already present in the standard spiller.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110934 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| 08e93b14c37277ab40b835de340f89ba357d3332 |
|
10-Aug-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Recalculate the spill weight and allocation hint for virtual registers created
during live range splitting.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110686 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| 5eb308b9448ee5b14fac26c0533eac481bc28471 |
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07-Aug-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Lazily defer duplicating the live interval we are splitting until we know it is
necessary.
Sometimes, live range splitting doesn't shrink the current interval, but simply
changes some instructions to use a new interval. That makes the original more
suitable for spilling. In this case, we don't need to duplicate the original.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110481 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| 7536f72a97ad25c3652fdfe26d392fd78b6ea7b9 |
|
05-Aug-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Checkpoint SplitKit progress.
We are now at a point where we can split around simple single-entry, single-exit
loops, although still with some bugs.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110257 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| f0179004e94259a8adab6c48f295ea9ab18af4c3 |
|
27-Jul-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Add SplitEditor to SplitKit. This class will be used to edit live intervals and
rewrite instructions for live range splitting.
Still work in progress.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109469 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| f2c6e367c1c0d8797e62e58a3ccdb8cceee27987 |
|
21-Jul-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Change the createSpiller interface to take a MachineFunctionPass argument.
The spillers can pluck the analyses they need from the pass reference.
Switch some never-null pointers to references.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108969 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| 6a0dc079efe7acf7e71cc4c0948fe814f35ba091 |
|
20-Jul-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Implement loop splitting analysis.
Determine which loop exit blocks need a 'pre-exit' block inserted.
Recognize when this would be impossible.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108941 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| abff28087fd6be8150ff0e69def7de7312b2f76b |
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20-Jul-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Appease the colonials.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108845 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
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| 8ae0263471cc29c5f8278ee1ea5b678042ec6dce |
|
20-Jul-2010 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Beginning SplitKit - utility classes for live range splitting.
This is a work in progress. So far we have some basic loop analysis to help
determine where it is useful to split a live range around a loop.
The actual loop splitting code from Splitter.cpp is also going to move in here.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108842 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/SplitKit.h
|