summaryrefslogtreecommitdiffstats
path: root/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp
Commit message (Collapse)AuthorAgeFilesLines
* Also update sub-register intervals after a trivial computation is rematt'ed ↵Evan Cheng2008-10-131-0/+10
| | | | | | for a copy instruction. PR2775. llvm-svn: 57458
* fix typoChris Lattner2008-10-111-1/+1
| | | | llvm-svn: 57388
* Add an option to enable StrongPHIElimination, for ease of testing.Owen Anderson2008-10-071-1/+5
| | | | llvm-svn: 57259
* Switch the MachineOperand accessors back to the short names likeDan Gohman2008-10-031-5/+5
| | | | | | isReg, etc., from isRegister, etc. llvm-svn: 57006
* Re-apply 56835 along with header file changes.Evan Cheng2008-09-301-1/+2
| | | | llvm-svn: 56848
* Revert commit 56835 since it breaks the build.Duncan Sands2008-09-301-2/+1
| | | | | | | | | | "If a re-materializable instruction has a register operand, the spiller will change the register operand's spill weight to HUGE_VAL to avoid it being spilled. However, if the operand is already in the queue ready to be spilled, avoid re-materializing it". llvm-svn: 56837
* If a re-materializable instruction has a register operand, the spiller will ↵Evan Cheng2008-09-301-1/+2
| | | | | | change the register operand's spill weight to HUGE_VAL to avoid it being spilled. However, if the operand is already in the queue ready to be spilled, avoid re-materializing it. llvm-svn: 56835
* Next round of earlyclobber handling. Approach theDale Johannesen2008-09-241-12/+0
| | | | | | | | | | RA problem by expanding the live interval of an earlyclobber def back one slot. Remove overlap-earlyclobber throughout. Remove earlyclobber bits and their handling from live internals. llvm-svn: 56539
* Mark several codegen passes as preserving all analysis.Evan Cheng2008-09-221-2/+2
| | | | llvm-svn: 56469
* Teach coalescer about earlyclobber bits.Dale Johannesen2008-09-201-0/+12
| | | | | | Check bits for preferred register. llvm-svn: 56384
* Continue after removing the current MI.Evan Cheng2008-09-191-0/+1
| | | | llvm-svn: 56372
* Re-materalized definition instructions may be dead. Whack them.Evan Cheng2008-09-191-7/+29
| | | | llvm-svn: 56352
* Unallocatable registers do not have live intervals.Evan Cheng2008-09-171-1/+3
| | | | llvm-svn: 56287
* Correctly update kill infos after extending a live range and merge 2 val#'s; ↵Evan Cheng2008-09-151-3/+8
| | | | | | fix 56165 - do not mark val# copy field if the copy does not define the val#. llvm-svn: 56199
* Remove isImm(), isReg(), and friends, in favor of Dan Gohman2008-09-131-2/+2
| | | | | | | | | isImmediate(), isRegister(), and friends, to avoid confusion about having two different names with the same meaning. I'm not attached to the longer names, and would be ok with changing to the shorter names if others prefer it. llvm-svn: 56189
* On some targets, non-move instructions can become move instructions because ↵Evan Cheng2008-09-121-14/+28
| | | | | | | | | | | | of coalescing. e.g. vr2 = OR vr0, vr1 => vr2 = OR vr1, vr1 // after coalescing vr0 with vr1 Update the value# of the destination register with the copy instruction if that happens. llvm-svn: 56165
* Fix PR2748. Avoid coalescing physical register with virtual register which ↵Evan Cheng2008-09-111-0/+63
| | | | | | | | | | | would create illegal extract_subreg. e.g. vr1024 = extract_subreg vr1025, 1 ... vr1024 = mov8rr AH If vr1024 is coalesced with AH, the extract_subreg is now illegal since AH does not have a super-reg whose sub-register 1 is AH. llvm-svn: 56118
* Fix PR2783 - coalescer bug. Missing a TargetRegisterInfo::isVirtualRegister ↵Evan Cheng2008-09-111-1/+2
| | | | | | check. llvm-svn: 56112
* Fix a bug in the coalescer where it didn't check if a live interval existed ↵Owen Anderson2008-09-101-1/+1
| | | | | | | | before trying to manipulate it. This was exposed by fast isel's handling of shifts on X86-64. With this, FreeBench/pcompress2 passes on X86-64 in fast isel. llvm-svn: 56067
* Fix typo.Evan Cheng2008-09-101-2/+2
| | | | llvm-svn: 56037
* Clear preference when it no longer makes sense.Evan Cheng2008-09-091-0/+8
| | | | llvm-svn: 56019
* Re-apply 55467 with fix. If copy is being replaced by remat'ed def, transfer ↵Evan Cheng2008-08-301-4/+76
| | | | | | the implicit defs onto the remat'ed instruction. llvm-svn: 55564
* Revert r55467; it causes regressions in UnitTests/Vector/divides,Dan Gohman2008-08-281-61/+4
| | | | | | Benchmarks/sim/sim, and others on x86-64. llvm-svn: 55475
* If a copy isn't coalesced, but its src is defined by trivial computation. ↵Evan Cheng2008-08-281-4/+61
| | | | | | Re-materialize the src to replace the copy. llvm-svn: 55467
* Convert uses of std::vector in TargetInstrInfo to SmallVector. This change ↵Owen Anderson2008-08-141-1/+1
| | | | | | had to be propoagated down into all the targets and up into all clients of this API. llvm-svn: 54802
* Use empty() instead of begin() == end().Dan Gohman2008-08-141-2/+2
| | | | llvm-svn: 54780
* Make the allocation of LiveIntervals explicit, rather than holding them in ↵Owen Anderson2008-08-131-2/+2
| | | | | | | | the r2iMap_ by value. This will prevent references to them from being invalidated if the map is changed. llvm-svn: 54763
* Remove #if 0.Evan Cheng2008-08-051-5/+0
| | | | llvm-svn: 54347
* Fix PR2568: Fix bug that cause redudant kill marker after its live interval ↵Evan Cheng2008-08-051-1/+3
| | | | | | has been extended due to coalescing. llvm-svn: 54346
* Fix a compile-time regression introduced by my heuristic-changing patch. I ↵Owen Anderson2008-07-231-1/+1
| | | | | | | | | forgot to multiply the instruction count by a constant factor in a few places, which caused the register allocator to require many more iterations. llvm-svn: 53959
* Change the heuristics used in the coalescer, register allocator, and withinOwen Anderson2008-07-221-8/+8
| | | | | | | live intervals itself to use an instruction count approximation that is not affected by inserting empty indices. llvm-svn: 53937
* Subreg live interval valno may not have a corresponding def machineinstr ↵Evan Cheng2008-07-171-1/+1
| | | | | | since it's less precise. llvm-svn: 53734
* Use getMBBEndIdx rather than assuming that the end is right after the last ↵Owen Anderson2008-06-231-1/+1
| | | | | | instruction in the block. llvm-svn: 52649
* Undo spill weight tweak. Need to investigate the performance regressions.Evan Cheng2008-06-211-2/+1
| | | | llvm-svn: 52572
* Coalesce copy from one register class to a sub register class. e.g. ↵Evan Cheng2008-06-191-22/+85
| | | | | | X86::MOV16to16_. llvm-svn: 52480
* When extending a liveinterval by commuting, don't throw away the live ranges ↵Evan Cheng2008-06-171-2/+13
| | | | | | that are not affected. llvm-svn: 52430
* The coalescer doesn't need LiveVariables now that we have register use ↵Owen Anderson2008-05-301-14/+6
| | | | | | iterators. llvm-svn: 51790
* Fix PR2289: vr defined by multiple implicit_def as result of coalescing.Evan Cheng2008-05-281-6/+9
| | | | llvm-svn: 51648
* Fix PR2343. An *interesting* coalescer bug.Evan Cheng2008-05-211-1/+27
| | | | | | | | | | | | | | BB1: vr1025 = copy vr1024 .. BB2: vr1024 = op = op vr1025 <loop eventually branch back to BB1> Even though vr1025 is copied from vr1024, it's not safe to coalesced them since live range of vr1025 intersects the def of vr1024. This happens when vr1025 is assigned the value of the previous iteration of vr1024 in the loop. llvm-svn: 51394
* Change class' public PassInfo variables to by initialized with theDan Gohman2008-05-131-1/+1
| | | | | | | | | | | address of the PassInfo directly instead of calling getPassInfo. This eliminates a bunch of dynamic initializations of static data. Also, fold RegisterPassBase into PassInfo, make a bunch of its data members const, and rearrange some code to initialize data members in constructors instead of using setter member functions. llvm-svn: 51022
* Clean up the use of static and anonymous namespaces. This turned upDan Gohman2008-05-131-14/+12
| | | | | | | several things that were neither in an anonymous namespace nor static but not intended to be global. llvm-svn: 51017
* Another extract_subreg coalescing bug.Evan Cheng2008-04-291-1/+3
| | | | | | | | e.g. vr1024<2> extract_subreg vr1025, 2 If vr1024 do not have the same register class as vr1025, it's not safe to coalesce this away. For example, vr1024 might be a GPR32 while vr1025 might be a GPR64. llvm-svn: 50385
* - Check if a register is livein before removing it. It may have already been ↵Evan Cheng2008-04-241-30/+30
| | | | | | | | removed. - Do not iterate over SmallPtrSet, the order of iteration is not deterministic. llvm-svn: 50209
* Correct comment.Evan Cheng2008-04-181-2/+2
| | | | llvm-svn: 49913
* Not safe to "kill" a register if its live range extends pass the end of ↵Evan Cheng2008-04-181-3/+29
| | | | | | block branch. llvm-svn: 49911
* Be more careful with insert_subreg and extract_subreg where either source or ↵Evan Cheng2008-04-171-27/+54
| | | | | | destination operand has already been coalesced with another register that's defined by a insert_subreg or extract_subreg. llvm-svn: 49843
* Use correct name for method in comment.Bill Wendling2008-04-171-4/+4
| | | | llvm-svn: 49841
* Fix a sub-register indice propagation bug.Evan Cheng2008-04-171-5/+14
| | | | llvm-svn: 49832
* After reading memory that's already freed.Evan Cheng2008-04-161-18/+20
| | | | llvm-svn: 49810
* Fix PR2226. Avoid using uninitialized variables.Evan Cheng2008-04-161-13/+28
| | | | llvm-svn: 49807
OpenPOWER on IntegriCloud