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path: root/lib/CodeGen/SelectionDAG/ScheduleDAGList.cpp
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2006-06-28Shave another 27K off libllvmgcc.dylib with visibility hiddenChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28973 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-30When a priority_queue is empty, the behavior of top() operator isEvan Cheng
non-deterministic. Returns NULL when it's empty! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28560 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-12Refactor a bunch of includes so that TargetMachine.h doesn't have to includeOwen Anderson
TargetData.h. This should make recompiles a bit faster with my current TargetData tinkering. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28238 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-11Refactor scheduler code. Move register-reduction list scheduler to aEvan Cheng
separate file. Added an initial implementation of top-down register pressure reduction list scheduler. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28226 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-10Templatify RegReductionPriorityQueueEvan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28212 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-09Add pseudo dependency to force a def&use operand to be scheduled last (unlessEvan Cheng
the distance between the def and another use is much longer). This is under option control for now "-sched-lower-defnuse". git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28201 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-05Fix VC++ compilation error.Jeff Cohen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28117 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-04Initial support for register pressure aware scheduling. The register reductionEvan Cheng
scheduler can go into a "vertical mode" (i.e. traversing up the two-address chain, etc.) when the register pressure is low. This does seem to reduce the number of spills in the cases I've looked at. But with x86, it's no guarantee the performance of the code improves. It can be turned on with -sched-vertically option. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28108 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-03Bottom up register pressure reduction work: clean up some hacks and enhancedEvan Cheng
the heuristic to further reduce spills for several test cases. (Note, it may not necessarily translate to runtime win!) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28076 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-01Dis-favor stores moreEvan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28035 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-01Bottom up register-pressure reduction scheduler now pushes store operationsEvan Cheng
up the schedule. This helps code that looks like this: loads ... computations (first set) ... stores (first set) ... loads computations (seccond set) ... stores (seccond set) ... Without this change, the stores and computations are more likely to interleave: loads ... loads ... computations (first set) ... computations (second set) ... computations (first set) ... stores (first set) ... computations (second set) ... stores (stores set) ... This can increase the number of spills if we are unlucky. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28033 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-01Didn't mean ScheduleDAGList.cpp to make the last checkin.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28030 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-01Remove temp. option -spiller-check-liveout, it didn't cause any failure nor ↵Evan Cheng
performance regressions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28029 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-12Don't advance the hazard recognizer when there are no hazards and no ↵Chris Lattner
instructions to be emitted. Don't add one to the latency of a completed instruction if the latency of the op is 0. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26718 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-12Chain operands aren't real uses: they don't require the full latency of theChris Lattner
predecessor to finish before they can start. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26717 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-12As a pending queue data structure to keep track of instructions whoseChris Lattner
operands have all issued, but whose results are not yet available. This allows us to compile: int G; int test(int A, int B, int* P) { return (G+A)*(B+1); } to: _test: lis r2, ha16(L_G$non_lazy_ptr) addi r4, r4, 1 lwz r2, lo16(L_G$non_lazy_ptr)(r2) lwz r2, 0(r2) add r2, r2, r3 mullw r3, r2, r4 blr instead of this, which has a stall between the lis/lwz: _test: lis r2, ha16(L_G$non_lazy_ptr) lwz r2, lo16(L_G$non_lazy_ptr)(r2) addi r4, r4, 1 lwz r2, 0(r2) add r2, r2, r3 mullw r3, r2, r4 blr git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26716 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-11rename priorityqueue -> availablequeue. When a node is scheduled, rememberChris Lattner
which cycle it lands on. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26714 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-11Make CurrCycle a local var instead of an instance varChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26713 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-11Move some methods around so that BU specific code is together, TD specific codeChris Lattner
is together, and direction independent code is together. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26712 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-11merge preds/chainpreds -> preds setChris Lattner
merge succs/chainsuccs -> succs set This has no functionality change, simplifies the code, and reduces the size of sunits. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26711 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-10Move some simple-sched-specific instance vars to the simple scheduler.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26690 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-10Make EmitNode take a SDNode instead of a NodeInfo*Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26687 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-10Move the VRBase field from NodeInfo to being a separate, explicit, map.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26686 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-10no need to build groups anymoreChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26684 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-10Create SUnits directly from the SelectionDAG.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26683 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-10Push PrepareNodeInfo/IdentifyGroups down the inheritance hierarchyChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26682 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-10Teach the latency scheduler some new tricks. In particular, to break ties,Chris Lattner
keep track of a sense of "mobility", i.e. how many other nodes scheduling one node will free up. For something like this: float testadd(float *X, float *Y, float *Z, float *W, float *V) { return (*X+*Y)*(*Z+*W)+*V; } For example, this makes us schedule *X then *Y, not *X then *Z. The former allows us to issue the add, the later only lets us issue other loads. This turns the above code from this: _testadd: lfs f0, 0(r3) lfs f1, 0(r6) lfs f2, 0(r4) lfs f3, 0(r5) fadds f0, f0, f2 fadds f1, f3, f1 lfs f2, 0(r7) fmadds f1, f0, f1, f2 blr into this: _testadd: lfs f0, 0(r6) lfs f1, 0(r5) fadds f0, f1, f0 lfs f1, 0(r4) lfs f2, 0(r3) fadds f1, f2, f1 lfs f2, 0(r7) fmadds f1, f1, f0, f2 blr git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26680 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-10add an aggregate method for reinserting scheduled nodes, add a callback forChris Lattner
priority impls that want to be notified when a node is scheduled git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26678 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-10Fix VC++ build breakage.Jeff Cohen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26676 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-09remove temporary optionChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26646 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-09yes yes, enabled debug output is badChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26637 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-09switch the t-d scheduler to use a really dumb and trivial critical pathChris Lattner
latency priority function. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26636 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-09Pull latency information for target instructions out of the latency tables. :)Chris Lattner
Only enable this with -use-sched-latencies, I'll enable it by default with a clean nightly tester run tonight. PPC is the only target that provides latency info currently. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26634 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-09PriorityQueue is an instance var, use it.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26632 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-09add some commentsChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26631 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-09Refactor the priority mechanism one step further: now that it is a separateChris Lattner
class, sever its implementation from the interface. Now we can provide new implementations of the same interface (priority computation) without touching the scheduler itself. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26630 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-08Split the priority function computation and priority queue management outChris Lattner
of the ScheduleDAGList class into a new SchedulingPriorityQueue class. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26613 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-08switch from an explicitly managed list of SUnits to a simple vector of sunitsChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26612 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-08Shrinkify some fields, fit to 80 columnsChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26611 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-08remove "Slot", it is deadChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26609 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-08Change the interface for getting a target HazardRecognizer to be more clean.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26608 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-07Fix some formatting, when looking for hazards, prefer target nodes overChris Lattner
things like copyfromreg. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26586 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-06update file commentChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26573 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-06Remove some code that doesn't make senseEvan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26572 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-06Remove SUnit::Priority1: it is re-calculated on demand as number of liveEvan Cheng
range to be generated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26570 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-06Hoist the HazardRecognizer out of the ScheduleDAGList.cpp file to whereChris Lattner
targets can implement them. Make the top-down scheduler non-g5-specific. Remove the old testing hazard recognizer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26569 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-05Comment fixesChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26567 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-05When a hazard recognizer needs noops to be inserted, do so. This representsChris Lattner
noops as null pointers in the instruction sequence. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26564 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-05Implement G5HazardRecognizer as a trivial thing that wants 5 cycles betweenChris Lattner
copyfromreg nodes. Clearly useful! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26559 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-05Add basic hazard recognizer support. noop insertion isn't complete yet though.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26558 91177308-0d34-0410-b5e6-96231b3b80d8
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