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-rw-r--r--lib/Target/PowerPC/PPCInstrInfo.cpp230
1 files changed, 230 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp
index 46cd4e69a8..2ad5e65bc2 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -12,6 +12,7 @@
//===----------------------------------------------------------------------===//
#include "PPCInstrInfo.h"
+#include "PPCInstrBuilder.h"
#include "PPCPredicates.h"
#include "PPCGenInstrInfo.inc"
#include "PPCTargetMachine.h"
@@ -305,6 +306,235 @@ void PPCInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
}
}
+static void StoreRegToStackSlot(const TargetInstrInfo &TII,
+ unsigned SrcReg, bool isKill, int FrameIdx,
+ const TargetRegisterClass *RC,
+ SmallVectorImpl<MachineInstr*> &NewMIs) {
+ if (RC == PPC::GPRCRegisterClass) {
+ if (SrcReg != PPC::LR) {
+ NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::STW))
+ .addReg(SrcReg, false, false, isKill), FrameIdx));
+ } else {
+ // FIXME: this spills LR immediately to memory in one step. To do this,
+ // we use R11, which we know cannot be used in the prolog/epilog. This is
+ // a hack.
+ NewMIs.push_back(BuildMI(TII.get(PPC::MFLR), PPC::R11));
+ NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::STW))
+ .addReg(PPC::R11, false, false, isKill), FrameIdx));
+ }
+ } else if (RC == PPC::G8RCRegisterClass) {
+ if (SrcReg != PPC::LR8) {
+ NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::STD))
+ .addReg(SrcReg, false, false, isKill), FrameIdx));
+ } else {
+ // FIXME: this spills LR immediately to memory in one step. To do this,
+ // we use R11, which we know cannot be used in the prolog/epilog. This is
+ // a hack.
+ NewMIs.push_back(BuildMI(TII.get(PPC::MFLR8), PPC::X11));
+ NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::STD))
+ .addReg(PPC::X11, false, false, isKill), FrameIdx));
+ }
+ } else if (RC == PPC::F8RCRegisterClass) {
+ NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::STFD))
+ .addReg(SrcReg, false, false, isKill), FrameIdx));
+ } else if (RC == PPC::F4RCRegisterClass) {
+ NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::STFS))
+ .addReg(SrcReg, false, false, isKill), FrameIdx));
+ } else if (RC == PPC::CRRCRegisterClass) {
+ // FIXME: We use R0 here, because it isn't available for RA.
+ // We need to store the CR in the low 4-bits of the saved value. First,
+ // issue a MFCR to save all of the CRBits.
+ NewMIs.push_back(BuildMI(TII.get(PPC::MFCR), PPC::R0));
+
+ // If the saved register wasn't CR0, shift the bits left so that they are in
+ // CR0's slot.
+ if (SrcReg != PPC::CR0) {
+ unsigned ShiftBits = PPCRegisterInfo::getRegisterNumbering(SrcReg)*4;
+ // rlwinm r0, r0, ShiftBits, 0, 31.
+ NewMIs.push_back(BuildMI(TII.get(PPC::RLWINM), PPC::R0)
+ .addReg(PPC::R0).addImm(ShiftBits).addImm(0).addImm(31));
+ }
+
+ NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::STW))
+ .addReg(PPC::R0, false, false, isKill), FrameIdx));
+ } else if (RC == PPC::VRRCRegisterClass) {
+ // We don't have indexed addressing for vector loads. Emit:
+ // R0 = ADDI FI#
+ // STVX VAL, 0, R0
+ //
+ // FIXME: We use R0 here, because it isn't available for RA.
+ NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::ADDI), PPC::R0),
+ FrameIdx, 0, 0));
+ NewMIs.push_back(BuildMI(TII.get(PPC::STVX))
+ .addReg(SrcReg, false, false, isKill).addReg(PPC::R0).addReg(PPC::R0));
+ } else {
+ assert(0 && "Unknown regclass!");
+ abort();
+ }
+}
+
+void
+PPCInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ unsigned SrcReg, bool isKill, int FrameIdx,
+ const TargetRegisterClass *RC) const {
+ SmallVector<MachineInstr*, 4> NewMIs;
+ StoreRegToStackSlot(*this, SrcReg, isKill, FrameIdx, RC, NewMIs);
+ for (unsigned i = 0, e = NewMIs.size(); i != e; ++i)
+ MBB.insert(MI, NewMIs[i]);
+}
+
+void PPCInstrInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
+ bool isKill,
+ SmallVectorImpl<MachineOperand> &Addr,
+ const TargetRegisterClass *RC,
+ SmallVectorImpl<MachineInstr*> &NewMIs) const {
+ if (Addr[0].isFrameIndex()) {
+ StoreRegToStackSlot(*this, SrcReg, isKill, Addr[0].getIndex(), RC, NewMIs);
+ return;
+ }
+
+ unsigned Opc = 0;
+ if (RC == PPC::GPRCRegisterClass) {
+ Opc = PPC::STW;
+ } else if (RC == PPC::G8RCRegisterClass) {
+ Opc = PPC::STD;
+ } else if (RC == PPC::F8RCRegisterClass) {
+ Opc = PPC::STFD;
+ } else if (RC == PPC::F4RCRegisterClass) {
+ Opc = PPC::STFS;
+ } else if (RC == PPC::VRRCRegisterClass) {
+ Opc = PPC::STVX;
+ } else {
+ assert(0 && "Unknown regclass!");
+ abort();
+ }
+ MachineInstrBuilder MIB = BuildMI(get(Opc))
+ .addReg(SrcReg, false, false, isKill);
+ for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
+ MachineOperand &MO = Addr[i];
+ if (MO.isRegister())
+ MIB.addReg(MO.getReg());
+ else if (MO.isImmediate())
+ MIB.addImm(MO.getImm());
+ else
+ MIB.addFrameIndex(MO.getIndex());
+ }
+ NewMIs.push_back(MIB);
+ return;
+}
+
+static void LoadRegFromStackSlot(const TargetInstrInfo &TII,
+ unsigned DestReg, int FrameIdx,
+ const TargetRegisterClass *RC,
+ SmallVectorImpl<MachineInstr*> &NewMIs) {
+ if (RC == PPC::GPRCRegisterClass) {
+ if (DestReg != PPC::LR) {
+ NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::LWZ), DestReg),
+ FrameIdx));
+ } else {
+ NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::LWZ), PPC::R11),
+ FrameIdx));
+ NewMIs.push_back(BuildMI(TII.get(PPC::MTLR)).addReg(PPC::R11));
+ }
+ } else if (RC == PPC::G8RCRegisterClass) {
+ if (DestReg != PPC::LR8) {
+ NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::LD), DestReg),
+ FrameIdx));
+ } else {
+ NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::LD), PPC::R11),
+ FrameIdx));
+ NewMIs.push_back(BuildMI(TII.get(PPC::MTLR8)).addReg(PPC::R11));
+ }
+ } else if (RC == PPC::F8RCRegisterClass) {
+ NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::LFD), DestReg),
+ FrameIdx));
+ } else if (RC == PPC::F4RCRegisterClass) {
+ NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::LFS), DestReg),
+ FrameIdx));
+ } else if (RC == PPC::CRRCRegisterClass) {
+ // FIXME: We use R0 here, because it isn't available for RA.
+ NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::LWZ), PPC::R0),
+ FrameIdx));
+
+ // If the reloaded register isn't CR0, shift the bits right so that they are
+ // in the right CR's slot.
+ if (DestReg != PPC::CR0) {
+ unsigned ShiftBits = PPCRegisterInfo::getRegisterNumbering(DestReg)*4;
+ // rlwinm r11, r11, 32-ShiftBits, 0, 31.
+ NewMIs.push_back(BuildMI(TII.get(PPC::RLWINM), PPC::R0)
+ .addReg(PPC::R0).addImm(32-ShiftBits).addImm(0).addImm(31));
+ }
+
+ NewMIs.push_back(BuildMI(TII.get(PPC::MTCRF), DestReg).addReg(PPC::R0));
+ } else if (RC == PPC::VRRCRegisterClass) {
+ // We don't have indexed addressing for vector loads. Emit:
+ // R0 = ADDI FI#
+ // Dest = LVX 0, R0
+ //
+ // FIXME: We use R0 here, because it isn't available for RA.
+ NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::ADDI), PPC::R0),
+ FrameIdx, 0, 0));
+ NewMIs.push_back(BuildMI(TII.get(PPC::LVX),DestReg).addReg(PPC::R0)
+ .addReg(PPC::R0));
+ } else {
+ assert(0 && "Unknown regclass!");
+ abort();
+ }
+}
+
+void
+PPCInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ unsigned DestReg, int FrameIdx,
+ const TargetRegisterClass *RC) const {
+ SmallVector<MachineInstr*, 4> NewMIs;
+ LoadRegFromStackSlot(*this, DestReg, FrameIdx, RC, NewMIs);
+ for (unsigned i = 0, e = NewMIs.size(); i != e; ++i)
+ MBB.insert(MI, NewMIs[i]);
+}
+
+void PPCInstrInfo::loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
+ SmallVectorImpl<MachineOperand> &Addr,
+ const TargetRegisterClass *RC,
+ SmallVectorImpl<MachineInstr*> &NewMIs) const{
+ if (Addr[0].isFrameIndex()) {
+ LoadRegFromStackSlot(*this, DestReg, Addr[0].getIndex(), RC, NewMIs);
+ return;
+ }
+
+ unsigned Opc = 0;
+ if (RC == PPC::GPRCRegisterClass) {
+ assert(DestReg != PPC::LR && "Can't handle this yet!");
+ Opc = PPC::LWZ;
+ } else if (RC == PPC::G8RCRegisterClass) {
+ assert(DestReg != PPC::LR8 && "Can't handle this yet!");
+ Opc = PPC::LD;
+ } else if (RC == PPC::F8RCRegisterClass) {
+ Opc = PPC::LFD;
+ } else if (RC == PPC::F4RCRegisterClass) {
+ Opc = PPC::LFS;
+ } else if (RC == PPC::VRRCRegisterClass) {
+ Opc = PPC::LVX;
+ } else {
+ assert(0 && "Unknown regclass!");
+ abort();
+ }
+ MachineInstrBuilder MIB = BuildMI(get(Opc), DestReg);
+ for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
+ MachineOperand &MO = Addr[i];
+ if (MO.isRegister())
+ MIB.addReg(MO.getReg());
+ else if (MO.isImmediate())
+ MIB.addImm(MO.getImm());
+ else
+ MIB.addFrameIndex(MO.getIndex());
+ }
+ NewMIs.push_back(MIB);
+ return;
+}
+
+
bool PPCInstrInfo::BlockHasNoFallThrough(MachineBasicBlock &MBB) const {
if (MBB.empty()) return false;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-06-25 02:48:08 +0000