Changes in directory llvm/lib/CodeGen/SelectionDAG:
SelectionDAGISel.cpp updated: 1.135 -> 1.136
---
Log message:
If scheduler choice is the default (-sched=default), use target scheduling
preference to determine which scheduler to use. SchedulingForLatency ==
Breadth first; SchedulingForRegPressure == bottom up register reduction list
scheduler.
---
Diffs of the changes: (+10 -2)
SelectionDAGISel.cpp | 12 ++++++++++--
1 files changed, 10 insertions(+), 2 deletions(-)
Index: llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1.135
llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1.136
--- llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1.135 Mon Jan 23
07:34:04 2006
+++ llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp Wed Jan 25 03:12:57 2006
@@ -59,8 +59,10 @@
ISHeuristic(
"sched",
cl::desc("Choose scheduling style"),
- cl::init(noScheduling),
+ cl::init(defaultScheduling),
cl::values(
+ clEnumValN(defaultScheduling, "default",
+ "Target preferred scheduling style"),
clEnumValN(noScheduling, "none",
"No scheduling: breadth first sequencing"),
clEnumValN(simpleScheduling, "simple",
@@ -69,7 +71,7 @@
clEnumValN(simpleNoItinScheduling, "simple-noitin",
"Simple two pass scheduling: Same as simple "
"except using generic latency"),
- clEnumValN(listSchedulingBURR, "list-BURR",
+ clEnumValN(listSchedulingBURR, "list-burr",
"Bottom up register reduction list scheduling"),
clEnumValEnd));
} // namespace
@@ -1772,6 +1774,12 @@
switch (ISHeuristic) {
default: assert(0 && "Unrecognized scheduling heuristic");
+ case defaultScheduling:
+ if (TLI.getSchedulingPreference() == TargetLowering::SchedulingForLatency)
+ SL = createSimpleDAGScheduler(noScheduling, DAG, BB);
+ else /* TargetLowering::SchedulingForRegPressure */
+ SL = createBURRListDAGScheduler(DAG, BB);
+ break;
case noScheduling:
case simpleScheduling:
case simpleNoItinScheduling:
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