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CheckForPhysRegDependency should not return copy cost. It's not used. No functionality change.

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llvm-svn: 62036
This commit is contained in:
Evan Cheng 2009-01-11 08:53:35 +00:00
parent 1c5828d337
commit e280fcfbbc
1 changed files with 4 additions and 9 deletions
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13
lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
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@ -39,11 +39,11 @@ SUnit *ScheduleDAGSDNodes::Clone(SUnit *Old) {
/// CheckForPhysRegDependency - Check if the dependency between def and use of
/// a specified operand is a physical register dependency. If so, returns the
/// register and the cost of copying the register.
/// register.
static void CheckForPhysRegDependency(SDNode *Def, SDNode *User, unsigned Op,
const TargetRegisterInfo *TRI,
const TargetInstrInfo *TII,
unsigned &PhysReg, int &Cost) {
unsigned &PhysReg) {
if (Op != 2 || User->getOpcode() != ISD::CopyToReg)
return;
@ -55,12 +55,8 @@ static void CheckForPhysRegDependency(SDNode *Def, SDNode *User, unsigned Op,
if (Def->isMachineOpcode()) {
const TargetInstrDesc &II = TII->get(Def->getMachineOpcode());
if (ResNo >= II.getNumDefs() &&
II.ImplicitDefs[ResNo - II.getNumDefs()] == Reg) {
II.ImplicitDefs[ResNo - II.getNumDefs()] == Reg)
PhysReg = Reg;
const TargetRegisterClass *RC =
TRI->getPhysicalRegisterRegClass(Reg, Def->getValueType(ResNo));
Cost = RC->getCopyCost();
}
}
}
@ -183,9 +179,8 @@ void ScheduleDAGSDNodes::AddSchedEdges() {
bool isChain = OpVT == MVT::Other;
unsigned PhysReg = 0;
int Cost = 1;
// Determine if this is a physical register dependency.
CheckForPhysRegDependency(OpN, N, i, TRI, TII, PhysReg, Cost);
CheckForPhysRegDependency(OpN, N, i, TRI, TII, PhysReg);
assert((PhysReg == 0 || !isChain) &&
"Chain dependence via physreg data?");
SU->addPred(SDep(OpSU, isChain ? SDep::Order : SDep::Data,