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Use aligned stack spills, where possible. This fixes PR2549. 

llvm-svn: 53784
This commit is contained in:
Anton Korobeynikov 2008-07-19 06:30:51 +00:00
parent f7ffd66551
commit b7a49925a1
1 changed files with 23 additions and 19 deletions
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42
llvm/lib/Target/X86/X86InstrInfo.cpp
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@ -1697,7 +1697,7 @@ void X86InstrInfo::copyRegToReg(MachineBasicBlock &MBB,
}
static unsigned getStoreRegOpcode(const TargetRegisterClass *RC,
unsigned StackAlign) {
bool isStackAligned) {
unsigned Opc = 0;
if (RC == &X86::GR64RegClass) {
Opc = X86::MOV64mr;
@ -1722,9 +1722,8 @@ static unsigned getStoreRegOpcode(const TargetRegisterClass *RC,
} else if (RC == &X86::FR64RegClass) {
Opc = X86::MOVSDmr;
} else if (RC == &X86::VR128RegClass) {
// FIXME: Use movaps once we are capable of selectively
// aligning functions that spill SSE registers on 16-byte boundaries.
Opc = StackAlign >= 16 ? X86::MOVAPSmr : X86::MOVUPSmr;
// If stack is realigned we can use aligned stores.
Opc = isStackAligned ? X86::MOVAPSmr : X86::MOVUPSmr;
} else if (RC == &X86::VR64RegClass) {
Opc = X86::MMX_MOVQ64mr;
} else {
@ -1739,7 +1738,8 @@ void X86InstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
unsigned SrcReg, bool isKill, int FrameIdx,
const TargetRegisterClass *RC) const {
unsigned Opc = getStoreRegOpcode(RC, RI.getStackAlignment());
const MachineFunction &MF = *MBB.getParent();
unsigned Opc = getStoreRegOpcode(RC, RI.needsStackRealignment(MF));
addFrameReference(BuildMI(MBB, MI, get(Opc)), FrameIdx)
.addReg(SrcReg, false, false, isKill);
}
@ -1749,7 +1749,7 @@ void X86InstrInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
SmallVectorImpl<MachineOperand> &Addr,
const TargetRegisterClass *RC,
SmallVectorImpl<MachineInstr*> &NewMIs) const {
unsigned Opc = getStoreRegOpcode(RC, RI.getStackAlignment());
unsigned Opc = getStoreRegOpcode(RC, RI.needsStackRealignment(MF));
MachineInstrBuilder MIB = BuildMI(MF, get(Opc));
for (unsigned i = 0, e = Addr.size(); i != e; ++i)
MIB = X86InstrAddOperand(MIB, Addr[i]);
@ -1758,7 +1758,7 @@ void X86InstrInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
}
static unsigned getLoadRegOpcode(const TargetRegisterClass *RC,
unsigned StackAlign) {
bool isStackAligned) {
unsigned Opc = 0;
if (RC == &X86::GR64RegClass) {
Opc = X86::MOV64rm;
@ -1783,9 +1783,8 @@ static unsigned getLoadRegOpcode(const TargetRegisterClass *RC,
} else if (RC == &X86::FR64RegClass) {
Opc = X86::MOVSDrm;
} else if (RC == &X86::VR128RegClass) {
// FIXME: Use movaps once we are capable of selectively
// aligning functions that spill SSE registers on 16-byte boundaries.
Opc = StackAlign >= 16 ? X86::MOVAPSrm : X86::MOVUPSrm;
// If stack is realigned we can use aligned loads.
Opc = isStackAligned ? X86::MOVAPSrm : X86::MOVUPSrm;
} else if (RC == &X86::VR64RegClass) {
Opc = X86::MMX_MOVQ64rm;
} else {
@ -1797,10 +1796,11 @@ static unsigned getLoadRegOpcode(const TargetRegisterClass *RC,
}
void X86InstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
unsigned DestReg, int FrameIdx,
const TargetRegisterClass *RC) const{
unsigned Opc = getLoadRegOpcode(RC, RI.getStackAlignment());
MachineBasicBlock::iterator MI,
unsigned DestReg, int FrameIdx,
const TargetRegisterClass *RC) const{
const MachineFunction &MF = *MBB.getParent();
unsigned Opc = getLoadRegOpcode(RC, RI.needsStackRealignment(MF));
addFrameReference(BuildMI(MBB, MI, get(Opc), DestReg), FrameIdx);
}
@ -1808,7 +1808,7 @@ void X86InstrInfo::loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
SmallVectorImpl<MachineOperand> &Addr,
const TargetRegisterClass *RC,
SmallVectorImpl<MachineInstr*> &NewMIs) const {
unsigned Opc = getLoadRegOpcode(RC, RI.getStackAlignment());
unsigned Opc = getLoadRegOpcode(RC, RI.needsStackRealignment(MF));
MachineInstrBuilder MIB = BuildMI(MF, get(Opc), DestReg);
for (unsigned i = 0, e = Addr.size(); i != e; ++i)
MIB = X86InstrAddOperand(MIB, Addr[i]);
@ -2272,10 +2272,12 @@ X86InstrInfo::unfoldMemoryOperand(SelectionDAG &DAG, SDNode *N,
// Emit the load instruction.
SDNode *Load = 0;
const MachineFunction &MF = DAG.getMachineFunction();
if (FoldedLoad) {
MVT VT = *RC->vt_begin();
Load = DAG.getTargetNode(getLoadRegOpcode(RC, RI.getStackAlignment()), VT,
MVT::Other, &AddrOps[0], AddrOps.size());
Load = DAG.getTargetNode(getLoadRegOpcode(RC, RI.needsStackRealignment(MF)),
VT, MVT::Other,
&AddrOps[0], AddrOps.size());
NewNodes.push_back(Load);
}
@ -2304,8 +2306,10 @@ X86InstrInfo::unfoldMemoryOperand(SelectionDAG &DAG, SDNode *N,
AddrOps.pop_back();
AddrOps.push_back(SDOperand(NewNode, 0));
AddrOps.push_back(Chain);
SDNode *Store = DAG.getTargetNode(getStoreRegOpcode(DstRC, RI.getStackAlignment()),
MVT::Other, &AddrOps[0], AddrOps.size());
SDNode *Store =
DAG.getTargetNode(getStoreRegOpcode(DstRC,
RI.needsStackRealignment(MF)),
MVT::Other, &AddrOps[0], AddrOps.size());
NewNodes.push_back(Store);
}