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473 Commits

Author SHA1 Message Date
Andrew Trick 89eb6a8b94 RABasic is nearly functionally complete. There are a few remaining 
benchmarks hitting an assertion.
Adds LiveIntervalUnion::collectInterferingVRegs.
Fixes "late spilling" by checking for any unspillable live vregs among
all physReg aliases.

llvm-svn: 118701
 2010-11-10 19:18:47 +00:00
Jakob Stoklund Olesen b7050233fb Teach MachineBasicBlock::print() to annotate instructions and blocks with 
SlotIndexes when available.

llvm-svn: 117392
 2010-10-26 20:21:46 +00:00
Owen Anderson 8ac477ffb5 Begin adding static dependence information to passes, which will allow us to 
perform initialization without static constructors AND without explicit initialization
by the client.  For the moment, passes are required to initialize both their
(potential) dependencies and any passes they preserve.  I hope to be able to relax
the latter requirement in the future.

llvm-svn: 116334
 2010-10-12 19:48:12 +00:00
Jakob Stoklund Olesen 57feeed92f Replace FindLiveRangeContaining() with getVNInfoAt() in LiveIntervalAnalysis. 
This helps hiding the LiveRange class which really should be private.

llvm-svn: 116244
 2010-10-11 21:45:03 +00:00
Owen Anderson df7a4f2515 Now with fewer extraneous semicolons! 
llvm-svn: 115996
 2010-10-07 22:25:06 +00:00
Lang Hames 564956867e Removed VNInfo::isDefAccurate(). Def "accuracy" can be checked by testing whether LiveIntervals::getInstructionFromIndex(def) returns NULL. 
llvm-svn: 114791
 2010-09-25 12:04:16 +00:00
Jakob Stoklund Olesen bc71af341e Remove SlotIndex::PHI_BIT. It is no longer used by anything. 
llvm-svn: 114779
 2010-09-25 00:45:18 +00:00
Evan Cheng 16bfe5b0f5 PHI elimination shouldn't require machineloopinfo since it's used at -O0. Move the requirement to LiveIntervalAnalysis instead. Note this does not change the number of times machineloopinfo is computed. 
llvm-svn: 111285
 2010-08-17 21:00:37 +00:00
Jakob Stoklund Olesen 073cd8004a Remove trailing whitespace. 
llvm-svn: 110944
 2010-08-12 20:01:23 +00:00
Jakob Stoklund Olesen 0c18757c9d Oops. Don't normalize spill weights twice. 
When the normalizeSpillWeights function was introduced, I forgot to remove this
normalization.

This change could affect register allocation. Hopefully for the better.

llvm-svn: 110119
 2010-08-03 17:21:16 +00:00
Owen Anderson a57b97e7e7 Fix batch of converting RegisterPass<> to INTIALIZE_PASS(). 
llvm-svn: 109045
 2010-07-21 22:09:45 +00:00
Jakob Stoklund Olesen 37c42a3d02 Remove many calls to TII::isMoveInstr. Targets should be producing COPY anyway. 
TII::isMoveInstr is going tobe completely removed.

llvm-svn: 108507
 2010-07-16 04:45:42 +00:00
Jakob Stoklund Olesen b5c899d11b Fix small bug in isMoveInstr -> COPY translation 
llvm-svn: 108013
 2010-07-09 20:55:49 +00:00
Jakob Stoklund Olesen bd953d1805 Change TII::foldMemoryOperand API to require the machine instruction to be 
inserted in a MBB, and return an already inserted MI.

This target API change is necessary to allow foldMemoryOperand to call
storeToStackSlot and loadFromStackSlot when folding a COPY to a stack slot
reference in a target independent way.

The foldMemoryOperandImpl hook is going to change in the same way, but I'll wait
until COPY folding is actually implemented. Most targets only fold copies and
won't need to specialize this hook at all.

llvm-svn: 107991
 2010-07-09 17:29:08 +00:00
Jakob Stoklund Olesen 00264624a9 Convert EXTRACT_SUBREG to COPY when emitting machine instrs. 
EXTRACT_SUBREG no longer appears as a machine instruction. Use COPY instead.

Add isCopy() checks in many places using isMoveInstr() and isExtractSubreg().
The isMoveInstr hook will be removed later.

llvm-svn: 107879
 2010-07-08 16:40:22 +00:00
Jakob Stoklund Olesen a1e883dcf6 Remove references to INSERT_SUBREG after de-SSA. 
Fix X86InstrInfo::convertToThreeAddressWithLEA to generate COPY instead of
INSERT_SUBREG.

llvm-svn: 107878
 2010-07-08 16:40:15 +00:00
Jakob Stoklund Olesen f0e551d4f4 Revert "Remove references to INSERT_SUBREG after de-SSA" r107725. 
Buildbot breakage.

llvm-svn: 107744
 2010-07-07 00:32:25 +00:00
Jakob Stoklund Olesen e2d3067f6b Remove references to INSERT_SUBREG after de-SSA 
llvm-svn: 107732
 2010-07-06 23:40:35 +00:00
Jakob Stoklund Olesen 70ee3ecd33 Convert INSERT_SUBREG to COPY in TwoAddressInstructionPass. 
INSERT_SUBREG will now only appear in SSA machine instructions.

Fix the handling of partial redefs in ProcessImplicitDefs. This is now relevant
since partial redef COPY instructions appear.

llvm-svn: 107726
 2010-07-06 23:26:25 +00:00
Jakob Stoklund Olesen 4c82a9e7d0 Detect and handle COPY in many places. 
This code is transitional, it will soon be possible to eliminate
isExtractSubreg, isInsertSubreg, and isMoveInstr in most places.

llvm-svn: 107547
 2010-07-03 00:04:37 +00:00
Benjamin Kramer a000002428 VNInfos don't need to be destructed anymore. 
llvm-svn: 106943
 2010-06-26 11:30:59 +00:00
Jakob Stoklund Olesen 55d738e2e1 Don't track kills in VNInfo. Use interval ends instead. 
The VNInfo.kills vector was almost unused except for all the code keeping it
updated. The few places using it were easily rewritten to check for interval
ends instead.

The two new methods LiveInterval::killedAt and killedInRange are replacements.

This brings us down to 3 independent data structures tracking kills.

llvm-svn: 106905
 2010-06-25 22:53:05 +00:00
Jakob Stoklund Olesen 9b659142a6 Remove the now unused LiveIntervals::getVNInfoSourceReg(). 
This method was always a bit too simplistic for the real world. It didn't really
deal with subregisters and such.

llvm-svn: 106781
 2010-06-24 20:18:15 +00:00
Jakob Stoklund Olesen 7f894d8fdc Remove the -fast-spill option. 
This code path has never really been used, and we are going to be handling
spilling through the Spiller interface in the future.

llvm-svn: 106777
 2010-06-24 19:56:08 +00:00
Jakob Stoklund Olesen 45230239e4 Replace a big gob of old coalescer logic with the new CoalescerPair class. 
CoalescerPair can determine if a copy can be coalesced, and which register gets
merged away. The old logic in SimpleRegisterCoalescing had evolved into
something a bit too convoluted.

This second attempt fixes some crashes that only occurred Linux.

llvm-svn: 106769
 2010-06-24 18:15:01 +00:00