From 710461688bba935f0ad5c75da7fec2ad0f225c00 Mon Sep 17 00:00:00 2001 From: David Goodwin Date: Thu, 13 Aug 2009 16:05:04 +0000 Subject: Add callback to allow target to adjust latency of schedule dependency edge. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78910 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp') diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp index 0b0aa269b6..ca4ba565d4 100644 --- a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp +++ b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp @@ -18,6 +18,7 @@ #include "llvm/Target/TargetMachine.h" #include "llvm/Target/TargetInstrInfo.h" #include "llvm/Target/TargetRegisterInfo.h" +#include "llvm/Target/TargetSubtarget.h" #include "llvm/Support/Debug.h" #include "llvm/Support/raw_ostream.h" using namespace llvm; @@ -152,6 +153,8 @@ void ScheduleDAGSDNodes::BuildSchedUnits() { } void ScheduleDAGSDNodes::AddSchedEdges() { + const TargetSubtarget &ST = TM.getSubtarget(); + // Pass 2: add the preds, succs, etc. for (unsigned su = 0, e = SUnits.size(); su != e; ++su) { SUnit *SU = &SUnits[su]; @@ -206,8 +209,13 @@ void ScheduleDAGSDNodes::AddSchedEdges() { // dependency. This may change in the future though. if (Cost >= 0) PhysReg = 0; - SU->addPred(SDep(OpSU, isChain ? SDep::Order : SDep::Data, - OpSU->Latency, PhysReg)); + + const SDep& dep = SDep(OpSU, isChain ? SDep::Order : SDep::Data, + OpSU->Latency, PhysReg); + if (!isChain) + ST.adjustSchedDependency((SDep &)dep); + + SU->addPred(dep); } } } -- cgit v1.2.3