Move some more functionality from MRegisterInfo to TargetInstrInfo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45603 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp
index 577b937..3d876c2 100644
--- a/lib/Target/X86/X86InstrInfo.cpp
+++ b/lib/Target/X86/X86InstrInfo.cpp
@@ -15,9 +15,11 @@
#include "X86.h"
#include "X86GenInstrInfo.inc"
#include "X86InstrBuilder.h"
+#include "X86MachineFunctionInfo.h"
#include "X86Subtarget.h"
#include "X86TargetMachine.h"
#include "llvm/ADT/STLExtras.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/LiveVariables.h"
@@ -962,6 +964,45 @@
NewMIs.push_back(MIB);
}
+bool X86InstrInfo::spillCalleeSavedRegisters(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ const std::vector<CalleeSavedInfo> &CSI) const {
+ if (CSI.empty())
+ return false;
+
+ bool is64Bit = TM.getSubtarget<X86Subtarget>().is64Bit();
+ unsigned SlotSize = is64Bit ? 8 : 4;
+
+ MachineFunction &MF = *MBB.getParent();
+ X86MachineFunctionInfo *X86FI = MF.getInfo<X86MachineFunctionInfo>();
+ X86FI->setCalleeSavedFrameSize(CSI.size() * SlotSize);
+
+ unsigned Opc = is64Bit ? X86::PUSH64r : X86::PUSH32r;
+ for (unsigned i = CSI.size(); i != 0; --i) {
+ unsigned Reg = CSI[i-1].getReg();
+ // Add the callee-saved register as live-in. It's killed at the spill.
+ MBB.addLiveIn(Reg);
+ BuildMI(MBB, MI, get(Opc)).addReg(Reg);
+ }
+ return true;
+}
+
+bool X86InstrInfo::restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ const std::vector<CalleeSavedInfo> &CSI) const {
+ if (CSI.empty())
+ return false;
+
+ bool is64Bit = TM.getSubtarget<X86Subtarget>().is64Bit();
+
+ unsigned Opc = is64Bit ? X86::POP64r : X86::POP32r;
+ for (unsigned i = 0, e = CSI.size(); i != e; ++i) {
+ unsigned Reg = CSI[i].getReg();
+ BuildMI(MBB, MI, get(Opc), Reg);
+ }
+ return true;
+}
+
bool X86InstrInfo::BlockHasNoFallThrough(MachineBasicBlock &MBB) const {
if (MBB.empty()) return false;