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path: root/lib/CodeGen/LiveIntervalAnalysis.cpp
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2010-07-16Remove many calls to TII::isMoveInstr. Targets should be producing COPY anyway.Jakob Stoklund Olesen
TII::isMoveInstr is going tobe completely removed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108507 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-09Fix small bug in isMoveInstr -> COPY translationJakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108013 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-09Change TII::foldMemoryOperand API to require the machine instruction to beJakob Stoklund Olesen
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107991 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-08Convert EXTRACT_SUBREG to COPY when emitting machine instrs.Jakob Stoklund Olesen
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107879 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-08Remove references to INSERT_SUBREG after de-SSA.Jakob Stoklund Olesen
Fix X86InstrInfo::convertToThreeAddressWithLEA to generate COPY instead of INSERT_SUBREG. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107878 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-07Revert "Remove references to INSERT_SUBREG after de-SSA" r107725.Jakob Stoklund Olesen
Buildbot breakage. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107744 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-06Remove references to INSERT_SUBREG after de-SSAJakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107732 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-06Convert INSERT_SUBREG to COPY in TwoAddressInstructionPass.Jakob Stoklund Olesen
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107726 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-03Detect and handle COPY in many places.Jakob Stoklund Olesen
This code is transitional, it will soon be possible to eliminate isExtractSubreg, isInsertSubreg, and isMoveInstr in most places. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107547 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-26VNInfos don't need to be destructed anymore.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106943 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-25Don't track kills in VNInfo. Use interval ends instead.Jakob Stoklund Olesen
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106905 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-24Remove the now unused LiveIntervals::getVNInfoSourceReg().Jakob Stoklund Olesen
This method was always a bit too simplistic for the real world. It didn't really deal with subregisters and such. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106781 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-24Remove the -fast-spill option.Jakob Stoklund Olesen
This code path has never really been used, and we are going to be handling spilling through the Spiller interface in the future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106777 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-24Replace a big gob of old coalescer logic with the new CoalescerPair class.Jakob Stoklund Olesen
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106769 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-24Verify that VNI kills are pointing to existing instructions.Jakob Stoklund Olesen
In this case it is essential that the kill is real because the spiller will decide to omit a spill if it thinks there is a later kill. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106751 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-24Revert "Replace a big gob of old coalescer logic with the new CoalescerPair ↵Jakob Stoklund Olesen
class." Whiny buildbots. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106710 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-24Replace a big gob of old coalescer logic with the new CoalescerPair class.Jakob Stoklund Olesen
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106701 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-18TwoAddressInstructionPass::CoalesceExtSubRegs can insert INSERT_SUBREGJakob Stoklund Olesen
instructions, but it doesn't really understand live ranges, so the first INSERT_SUBREG uses an implicitly defined register. Fix it in LiveVariableAnalysis by adding the <undef> flag. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106333 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-16Allow a register to be redefined multiple times in a basic block.Jakob Stoklund Olesen
LiveVariableAnalysis was a bit picky about a register only being redefined once, but that really isn't necessary. Here is an example of chained INSERT_SUBREGs that we can handle now: 68 %reg1040<def> = INSERT_SUBREG %reg1040, %reg1028<kill>, 14 register: %reg1040 +[70,134:0) 76 %reg1040<def> = INSERT_SUBREG %reg1040, %reg1029<kill>, 13 register: %reg1040 replace range with [70,78:1) RESULT: %reg1040,0.000000e+00 = [70,78:1)[78,134:0) 0@78-(134) 1@70-(78) 84 %reg1040<def> = INSERT_SUBREG %reg1040, %reg1030<kill>, 12 register: %reg1040 replace range with [78,86:2) RESULT: %reg1040,0.000000e+00 = [70,78:1)[78,86:2)[86,134:0) 0@86-(134) 1@70-(78) 2@78-(86) 92 %reg1040<def> = INSERT_SUBREG %reg1040, %reg1031<kill>, 11 register: %reg1040 replace range with [86,94:3) RESULT: %reg1040,0.000000e+00 = [70,78:1)[78,86:2)[86,94:3)[94,134:0) 0@94-(134) 1@70-(78) 2@78-(86) 3@86-(94) rdar://problem/8096390 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106152 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-03Use readsWritesVirtualRegister instead of counting uses and defs when insertingJakob Stoklund Olesen
spills and reloads. This means that a partial define of a register causes a reload so the other parts of the register are preserved. The reload can be prevented by adding an <imp-def> operand for the full register. This is already done by the coalescer and live interval analysis where relevant. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105369 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-21- Change MachineInstr::findRegisterDefOperandIdx so it can also look for defsEvan Cheng
that are aliases of the specified register. - Rename modifiesRegister to definesRegister since it's looking a def of the specific register or one of its super-registers. It's not looking for def of a sub-register or alias that could change the specified register. - Added modifiesRegister to look for defs of aliases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104377 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-21Revert "Use MachineInstr::readsWritesVirtualRegister to determine if a ↵Jakob Stoklund Olesen
register is read." This reverts r104322. I think it was causing miscompilations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104323 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-21Use MachineInstr::readsWritesVirtualRegister to determine if a register is read.Jakob Stoklund Olesen
This correctly handles partial redefines and undef uses. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104322 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-21If the first definition of a virtual register is a partial redef, add anJakob Stoklund Olesen
<imp-def> operand for the full register. This ensures that the full physical register is marked live after register allocation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104320 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-20Fix typo in comment.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104209 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-17Yes, if the redef is a copy, update the old val# with the copy. But make ↵Evan Cheng
sure to clear the copy field if the redef is not a copy. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103922 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-15improve portability to systems that don't have powf/modf (e.g. solaris 9)Chris Lattner
patch by Evzen Muller! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103876 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-15A partial re-def instruction may be a copy.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103850 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-10Re-defined valno is always valno even for partial re-def's.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103410 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-05Teach liveintervalanalysis about virtual registers which are defined by ↵Evan Cheng
reg_sequence instructions that are formed by registers defined by distinct instructions. e.g. 80 %reg1041:6<def> = VSHRNv4i16 %reg1034<kill>, 12, pred:14, pred:%reg0 . . . 120 %reg1041:5<def> = VSHRNv4i16 %reg1039<kill>, 12, pred:14, pred:%reg0 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103102 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-04Teach PHI elimination to remove REG_SEQUENCE instructions and update ↵Evan Cheng
references of the source operands with references of the destination with subreg indices. e.g. %reg1029<def>, %reg1030<def> = VLD1q16 %reg1024<kill>, ... %reg1031<def> = REG_SEQUENCE %reg1029<kill>, 5, %reg1030<kill>, 6 => %reg1031:5<def>, %reg1031:6<def> = VLD1q16 %reg1024<kill>, ... PHI elimination now does more than phi elimination. It is really a de-SSA pass. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103039 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-03Print basic block numbers in live interval debug output. Since the rest of theBob Wilson
debug output is showing machine instructions, the IR-level basic block names aren't very meaningful, and because multiple machine basic blocks may be derived from one IR-level BB, they're also not unique. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102960 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-28- Really preserve dbg_value instructions when the register is spilled.Evan Cheng
- Also, update dbg_value is the value is being re-matted from a frame slot, e.g. fixed slots for arguments. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102565 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-26Re-enable 102323 with fix: do not update dbg_value's with incorrect frame ↵Evan Cheng
indices when the live interval are being re-materialized. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102361 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-26Temporary disable spiller modifying dbg_value. It's breaking build.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102327 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-26- Move TargetLowering::EmitTargetCodeForFrameDebugValue to TargetInstrInfo ↵Evan Cheng
and rename it to emitFrameIndexDebugValue. - Teach spiller to modify DBG_VALUE instructions to reference spill slots. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102323 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13Eliminate MachineBasicBlock::const_livein_iterator and makeDan Gohman
MachineBasicBlock::livein_iterator a const_iterator, because clients shouldn't ever be using the iterator interface to mutate the livein set. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101147 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-07rename llvm::llvm_report_error -> llvm::report_fatal_errorChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100709 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-30Introduce SpecificBumpPtrAllocator, a wrapper for BumpPtrAllocator which allowsBenjamin Kramer
only a single type of object to be allocated. Use it to make VNInfo destruction typesafe. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99919 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-30Reapply r99881 with some fixes: only call destructor in releaseMemory!Torok Edwin
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99883 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-30Revert 99881, it brooke smooshlab's llvm-gcc-i386-darwin9.Torok Edwin
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99882 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-30Introduce another Reset() method in BumpPtrAllocator that calls a destructorTorok Edwin
on all objects it has allocated, if they are all of the same size and alignment. Use this to destruct all VNInfos allocated in LiveIntervalAnalysis (PR6653). valnos is not reliable for this purpose, as seen in r99400 (which still leaked, and sometimes caused double frees). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99881 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-30Avoid being influenced by the presence of dbg_value instructions.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99879 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-24Revert Edwin's change that is breaking MultiSource/Applications/ClamAV/clamscan.Bob Wilson
--- Reverse-merging r99400 into '.': D test/CodeGen/Generic/2010-03-24-liveintervalleak.ll U lib/CodeGen/LiveIntervalAnalysis.cpp git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99419 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-24Fix memory leak in liveintervals: the destructor for VNInfos must be called,Torok Edwin
otherwise the SmallVector it contains doesn't free its memory. In most cases LiveIntervalAnalysis could get away by not calling the destructor, because VNInfos are bumpptr-allocated, and smallvectors usually don't grow. However when the SmallVector does grow it always leaks. This is the valgrind shown leak from the original testcase: ==8206== 18,304 bytes in 151 blocks are definitely lost in loss record 164 of 164 ==8206== at 0x4A079C7: operator new(unsigned long) (vg_replace_malloc.c:220) ==8206== by 0x4DB7A7E: llvm::SmallVectorBase::grow_pod(unsigned long, unsigned long) (in /home/edwin/clam/git/builds/defaul t/libclamav/.libs/libclamav.so.6.1.0) ==8206== by 0x4F90382: llvm::VNInfo::addKill(llvm::SlotIndex) (in /home/edwin/clam/git/builds/default/libclamav/.libs/libcl amav.so.6.1.0) ==8206== by 0x5126B5C: llvm::LiveIntervals::handleVirtualRegisterDef(llvm::MachineBasicBlock*, llvm::ilist_iterator<llvm::M achineInstr>, llvm::SlotIndex, llvm::MachineOperand&, unsigned int, llvm::LiveInterval&) (in /home/edwin/clam/git/builds/defau lt/libclamav/.libs/libclamav.so.6.1.0) ==8206== by 0x512725E: llvm::LiveIntervals::handleRegisterDef(llvm::MachineBasicBlock*, llvm::ilist_iterator<llvm::MachineI nstr>, llvm::SlotIndex, llvm::MachineOperand&, unsigned int) (in /home/edwin/clam/git/builds/default/libclamav/.libs/libclamav .so.6.1.0) ==8206== by 0x51278A8: llvm::LiveIntervals::computeIntervals() (in /home/edwin/clam/git/builds/default/libclamav/.libs/libc lamav.so.6.1.0) ==8206== by 0x5127CB4: llvm::LiveIntervals::runOnMachineFunction(llvm::MachineFunction&) (in /home/edwin/clam/git/builds/de fault/libclamav/.libs/libclamav.so.6.1.0) ==8206== by 0x4DAE935: llvm::FPPassManager::runOnFunction(llvm::Function&) (in /home/edwin/clam/git/builds/default/libclama v/.libs/libclamav.so.6.1.0) ==8206== by 0x4DAEB10: llvm::FunctionPassManagerImpl::run(llvm::Function&) (in /home/edwin/clam/git/builds/default/libclama v/.libs/libclamav.so.6.1.0) ==8206== by 0x4DAED3D: llvm::FunctionPassManager::run(llvm::Function&) (in /home/edwin/clam/git/builds/default/libclamav/.l ibs/libclamav.so.6.1.0) ==8206== by 0x4D8BE8E: llvm::JIT::runJITOnFunctionUnlocked(llvm::Function*, llvm::MutexGuard const&) (in /home/edwin/clam/git/builds/default/libclamav/.libs/libclamav.so.6.1.0) ==8206== by 0x4D8CA72: llvm::JIT::getPointerToFunction(llvm::Function*) (in /home/edwin/clam/git/builds/default/libclamav/.libs/libclamav.so.6.1.0) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99400 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-16Fix liveintervals handling of dbg_value instructions.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98686 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-11The check for coalescing a virtual register to a physical register, e.g.Evan Cheng
cl = EXTRACT_SUBREG reg1024, 1, is overly conservative. It should check for overlaps of vr's live interval with the super registers of the physical register (ECX in this case) and let JoinIntervals() handle checking the coalescing feasibility against the physical register (cl in this case). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98251 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-10Fix a bug in DEBUG_VALUE handling Devang ran into.Dale Johannesen
I'll get this loop right yet. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98155 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-01Use methods to determine if a LiveInterval is spillable.Jakob Stoklund Olesen
Don't accidentally produce unspillable intervals for deeply nested loops. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97496 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-23Keep track of phi join registers explicitly in LiveVariables.Jakob Stoklund Olesen
Previously, LiveIntervalAnalysis would infer phi joins by looking for multiply defined registers. That doesn't work if the phi join is implicitly defined in all but one of the predecessors. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96994 91177308-0d34-0410-b5e6-96231b3b80d8
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