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path: root/lib/CodeGen/LiveIntervalAnalysis.cpp
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2007-04-02Ugh. Copy coalescer does not update register numbers.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35600 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-30Bug fix for PR1279. When isDead is propagate by copy coalescing, we keep lengthEvan Cheng
of dead def live interval at 1 to avoid multiple def's targeting the same register. The previous patch missed a case where the source operand is live-in. In that case, remove the whole interval. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35512 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-28Move rematerialization out of beta.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35419 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-28Fix for PR1279. Dead def has a live interval of length 1. Copy coalescing shouldEvan Cheng
not violate that. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35396 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-26Fix for PR1266. Don't mark a two address operand IsKill.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35365 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-22Fix for PR1257. Bug in live range shortening as a result of copy coalescingEvan Cheng
where the destination is dead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35252 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-20First cut trivial re-materialization support.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35208 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-19Remove -reduce-joining-phys-regs options. Make it on by default.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35165 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-19Minor bug fix.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35153 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-18- Merge UsedBlocks info after two virtual registers are coalesced.Evan Cheng
- Use distance to closest use to determine whether to abort coalescing. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35141 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-17Joining a live interval of a physical register with a virtual one can turn outEvan Cheng
to be really bad. Once they are joined they are not broken apart. Also, physical intervals cannot be spilled! Added a heuristic as a workaround for this. Be careful coalescing with a physical register if the virtual register uses are "far". Check if there are uses in the same loop as the source (copy instruction). Check if it is in the loop preheader, etc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35134 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-15Debugging output stuff.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35117 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-03Watch out for cases like this:Evan Cheng
entry (0x8b056f0, LLVM BB @0x8b01b30, ID#0): Live Ins: %r0 %r1 %r2 %r3 %reg1032 = tMOVrr %r3<kill> %reg1033 = tMOVri8 1 %reg1034 = tMOVri8 0 tCMPi8 %reg1029<kill>, 0 tBcc mbb<entry,0x8b06a10>, 0 Successors according to CFG: 0x8b06980 0x8b06a10 entry (0x8b06980, LLVM BB @0x8b01b30, ID#12): Predecessors according to CFG: 0x8b056f0 %reg1036 = tMOVrr %reg1034<kill> Successors according to CFG: 0x8b06a10 entry (0x8b06a10, LLVM BB @0x8b01b30, ID#13): Predecessors according to CFG: 0x8b056f0 0x8b06980 %reg1024<dead> = tMOVrr %reg1030<kill> ... reg1030 and r1 have already been joined. When reg1024 and reg1030 are joined, r1 live range from function entry to the tMOVrr instruction are dead. Eliminate r1 from the livein set of the entry BB, not the BB where the copy is. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34866 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-02Dead live-in detection bug.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34843 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-01Oops.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34768 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-01Track all joined registers and eliminate unneeded kills after all joining ↵Evan Cheng
are done. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34767 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-26Joining an interval with a dead copy instruction. Shorten the live range to ↵Evan Cheng
the last use. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34645 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-25Fix a couple of bugs related IsDead back propagation during coalescing.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34595 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-25If the liveinterval of the source instruction has been extended, remove the ↵Evan Cheng
IsKill marker. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34594 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-23Handle cases when joining live intervals of two virtual registers.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34534 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-22Remove unnecessary isKill properties if a live range has been lengthened due ↵Evan Cheng
to coalescing. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34503 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-21Allow for live in registers for eh landing pads.Jim Laskey
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34475 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-21Out of bound reference.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34461 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-19Re-apply my liveintervalanalysis changes. Now with PR1207 fixes.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34428 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-19For PR1207:Reid Spencer
Revert patches that caused the problem. Evan, please investigate and reapply when you've discovered the problem. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34399 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-17- Changes how function livein's are handled, they now have a start index of 0.Evan Cheng
- When coalescing a copy MI, if its destination is "dead", propagate the property to the source MI's destination if there are no intervening uses. - Detect dead function live-in's and remove them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34383 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-15Use BitVector instead of vector<bool> which can be extremely slow.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34302 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-13Allow any MachineBasicBlock (not just the entry block) to have live-in physicalEvan Cheng
registers. Make sure liveinterval analysis is correctly creating live ranges for them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34217 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-19Eliminate static ctors from StatisticsChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32698 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-07Changed llvm_ostream et all to OStream. llvm_cerr, llvm_cout, llvm_null, areBill Wendling
now cerr, cout, and NullStream resp. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32298 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-07MI keeps a ptr of TargetInstrDescriptor, use it.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32296 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-06Detemplatize the Statistic class. The only type it is instantiated withChris Lattner
is 'unsigned'. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32279 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-02Unbreak VC++ build.Jeff Cohen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32113 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-01Match TargetInstrInfo changes.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32098 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-29Converted to using llvm streams instead of <iostream>sBill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31992 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-16Don't recompute getNumOperands for each iteration.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31783 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-16Added a new method "CreateNewLiveInterval" which, given a list ofBill Wendling
LiveRanges, creates a new LiveInterval from them. The LiveRanges should have existed already in another LiveInterval, but removed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31780 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-15A register def can be partially dead when the whole register has use(s) but ↵Evan Cheng
a subreg does not. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31760 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-10Add implicit def / use operands to MachineInstr.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31633 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-08Remove redundant <cmath>.Jim Laskey
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31561 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-07Enable improved spilling costs by default. This speeds up viterbi on x86Chris Lattner
by 40%, FreeBench/fourinarow by 20%, and many other programs 10-25%. On PPC, this speeds up fourinarow by 18%, and probably other things as well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31504 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-07Use correct value for float HUGH_VAL.Jim Laskey
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31500 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-07Add a new llcbeta option. This speeds up viterbi from 12.34 to 8.76s onChris Lattner
X86. If happy, I'll enable this by default. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31493 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-03Proper check for two-addressness.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31408 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-02For PR786:Reid Spencer
Turn on -Wunused and -Wno-unused-parameter. Clean up most of the resulting fall out by removing unused variables. Remaining warnings have to do with unused functions (I didn't want to delete code without review) and unused variables in generated code. Maintainers should clean up the remaining issues when they see them. All changes pass DejaGnu tests and Olden. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31380 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-15Keep track of the start of MBB's in a separate map from instructions. ThisChris Lattner
is faster and is needed for future improvements. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30383 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-05Fix a long-standing wart in the code generator: two-address instruction loweringChris Lattner
actually *removes* one of the operands, instead of just assigning both operands the same register. This make reasoning about instructions unnecessarily complex, because you need to know if you are before or after register allocation to match up operand #'s with the target description file. Changing this also gets rid of a bunch of hacky code in various places. This patch also includes changes to fold loads into cmp/test instructions in the X86 backend, along with a significant simplification to the X86 spill folding code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30108 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-04Correct fix for a crasher on functions with live in valuesChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30099 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-04Hack around a regression I introduced yesterdayChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30098 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-03Avoid beating on the mi2i map when we know the answer already.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30066 91177308-0d34-0410-b5e6-96231b3b80d8
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