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

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62036 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2009-01-11 08:53:35 +00:00
parent 3d9fbee0df
commit 9aacec1f26
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 /// CheckForPhysRegDependency - Check if the dependency between def and use of
/// a specified operand is a physical register dependency. If so, returns the /// 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, static void CheckForPhysRegDependency(SDNode *Def, SDNode *User, unsigned Op,
const TargetRegisterInfo *TRI, const TargetRegisterInfo *TRI,
const TargetInstrInfo *TII, const TargetInstrInfo *TII,
unsigned &PhysReg, int &Cost) { unsigned &PhysReg) {
if (Op != 2 || User->getOpcode() != ISD::CopyToReg) if (Op != 2 || User->getOpcode() != ISD::CopyToReg)
return; return;
@@ -55,12 +55,8 @@ static void CheckForPhysRegDependency(SDNode *Def, SDNode *User, unsigned Op,
if (Def->isMachineOpcode()) { if (Def->isMachineOpcode()) {
const TargetInstrDesc &II = TII->get(Def->getMachineOpcode()); const TargetInstrDesc &II = TII->get(Def->getMachineOpcode());
if (ResNo >= II.getNumDefs() && if (ResNo >= II.getNumDefs() &&
II.ImplicitDefs[ResNo - II.getNumDefs()] == Reg) { II.ImplicitDefs[ResNo - II.getNumDefs()] == Reg)
PhysReg = 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; bool isChain = OpVT == MVT::Other;
unsigned PhysReg = 0; unsigned PhysReg = 0;
int Cost = 1;
// Determine if this is a physical register dependency. // 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) && assert((PhysReg == 0 || !isChain) &&
"Chain dependence via physreg data?"); "Chain dependence via physreg data?");
SU->addPred(SDep(OpSU, isChain ? SDep::Order : SDep::Data, SU->addPred(SDep(OpSU, isChain ? SDep::Order : SDep::Data,