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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28278 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-05-13 05:53:47 +00:00
parent dd73e7fa09
commit ee00a1d12c
2 changed files with 27 additions and 28 deletions
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12
include/llvm/CodeGen/ScheduleDAG.h
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@ -143,18 +143,6 @@ namespace llvm {
class ScheduleDAG { class ScheduleDAG {
public: public:
// Scheduling heuristics
enum SchedHeuristics {
defaultScheduling, // Let the target specify its preference.
noScheduling, // No scheduling, emit breadth first sequence.
simpleScheduling, // Two pass, min. critical path, max. utilization.
simpleNoItinScheduling, // Same as above exact using generic latency.
listSchedulingBURR, // Bottom-up reg reduction list scheduling.
listSchedulingTDRR, // Top-down reg reduction list scheduling.
listSchedulingTD // Top-down list scheduler.
};
SelectionDAG &DAG; // DAG of the current basic block SelectionDAG &DAG; // DAG of the current basic block
MachineBasicBlock *BB; // Current basic block MachineBasicBlock *BB; // Current basic block
const TargetMachine &TM; // Target processor const TargetMachine &TM; // Target processor

43
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
View File

@ -58,28 +58,39 @@ ViewSchedDAGs("view-sched-dags", cl::Hidden,
static const bool ViewISelDAGs = 0, ViewSchedDAGs = 0; static const bool ViewISelDAGs = 0, ViewSchedDAGs = 0;
#endif #endif
// Scheduling heuristics
enum SchedHeuristics {
defaultScheduling, // Let the target specify its preference.
noScheduling, // No scheduling, emit breadth first sequence.
simpleScheduling, // Two pass, min. critical path, max. utilization.
simpleNoItinScheduling, // Same as above exact using generic latency.
listSchedulingBURR, // Bottom-up reg reduction list scheduling.
listSchedulingTDRR, // Top-down reg reduction list scheduling.
listSchedulingTD // Top-down list scheduler.
};
namespace { namespace {
cl::opt<ScheduleDAG::SchedHeuristics> cl::opt<SchedHeuristics>
ISHeuristic( ISHeuristic(
"sched", "sched",
cl::desc("Choose scheduling style"), cl::desc("Choose scheduling style"),
cl::init(ScheduleDAG::defaultScheduling), cl::init(defaultScheduling),
cl::values( cl::values(
clEnumValN(ScheduleDAG::defaultScheduling, "default", clEnumValN(defaultScheduling, "default",
"Target preferred scheduling style"), "Target preferred scheduling style"),
clEnumValN(ScheduleDAG::noScheduling, "none", clEnumValN(noScheduling, "none",
"No scheduling: breadth first sequencing"), "No scheduling: breadth first sequencing"),
clEnumValN(ScheduleDAG::simpleScheduling, "simple", clEnumValN(simpleScheduling, "simple",
"Simple two pass scheduling: minimize critical path " "Simple two pass scheduling: minimize critical path "
"and maximize processor utilization"), "and maximize processor utilization"),
clEnumValN(ScheduleDAG::simpleNoItinScheduling, "simple-noitin", clEnumValN(simpleNoItinScheduling, "simple-noitin",
"Simple two pass scheduling: Same as simple " "Simple two pass scheduling: Same as simple "
"except using generic latency"), "except using generic latency"),
clEnumValN(ScheduleDAG::listSchedulingBURR, "list-burr", clEnumValN(listSchedulingBURR, "list-burr",
"Bottom-up register reduction list scheduling"), "Bottom-up register reduction list scheduling"),
clEnumValN(ScheduleDAG::listSchedulingTDRR, "list-tdrr", clEnumValN(listSchedulingTDRR, "list-tdrr",
"Top-down register reduction list scheduling"), "Top-down register reduction list scheduling"),
clEnumValN(ScheduleDAG::listSchedulingTD, "list-td", clEnumValN(listSchedulingTD, "list-td",
"Top-down list scheduler"), "Top-down list scheduler"),
clEnumValEnd)); clEnumValEnd));
} // namespace } // namespace
@ -3409,7 +3420,7 @@ void SelectionDAGISel::ScheduleAndEmitDAG(SelectionDAG &DAG) {
switch (ISHeuristic) { switch (ISHeuristic) {
default: assert(0 && "Unrecognized scheduling heuristic"); default: assert(0 && "Unrecognized scheduling heuristic");
case ScheduleDAG::defaultScheduling: case defaultScheduling:
if (TLI.getSchedulingPreference() == TargetLowering::SchedulingForLatency) if (TLI.getSchedulingPreference() == TargetLowering::SchedulingForLatency)
SL = createTDListDAGScheduler(DAG, BB, CreateTargetHazardRecognizer()); SL = createTDListDAGScheduler(DAG, BB, CreateTargetHazardRecognizer());
else { else {
@ -3418,22 +3429,22 @@ void SelectionDAGISel::ScheduleAndEmitDAG(SelectionDAG &DAG) {
SL = createBURRListDAGScheduler(DAG, BB); SL = createBURRListDAGScheduler(DAG, BB);
} }
break; break;
case ScheduleDAG::noScheduling: case noScheduling:
SL = createBFS_DAGScheduler(DAG, BB); SL = createBFS_DAGScheduler(DAG, BB);
break; break;
case ScheduleDAG::simpleScheduling: case simpleScheduling:
SL = createSimpleDAGScheduler(false, DAG, BB); SL = createSimpleDAGScheduler(false, DAG, BB);
break; break;
case ScheduleDAG::simpleNoItinScheduling: case simpleNoItinScheduling:
SL = createSimpleDAGScheduler(true, DAG, BB); SL = createSimpleDAGScheduler(true, DAG, BB);
break; break;
case ScheduleDAG::listSchedulingBURR: case listSchedulingBURR:
SL = createBURRListDAGScheduler(DAG, BB); SL = createBURRListDAGScheduler(DAG, BB);
break; break;
case ScheduleDAG::listSchedulingTDRR: case listSchedulingTDRR:
SL = createTDRRListDAGScheduler(DAG, BB); SL = createTDRRListDAGScheduler(DAG, BB);
break; break;
case ScheduleDAG::listSchedulingTD: case listSchedulingTD:
SL = createTDListDAGScheduler(DAG, BB, CreateTargetHazardRecognizer()); SL = createTDListDAGScheduler(DAG, BB, CreateTargetHazardRecognizer());
break; break;
} }