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Add support for C++ exception handling.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132131 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka
2011-05-26 18:59:03 +00:00
parent 32bfb2c513
commit cf0cd8005c
7 changed files with 76 additions and 21 deletions
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lib/Target/Mips/MipsFrameLowering.cpp
+40 -8
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@@ -182,24 +182,49 @@ void MipsFrameLowering::emitPrologue(MachineFunction &MF) const {
if (ATUsed)
BuildMI(MBB, MBBI, dl, TII.get(Mips::ATMACRO));
// if framepointer enabled, set it to point to the stack pointer.
if (hasFP(MF)) {
// Find the instruction past the last instruction that saves a callee-saved
// register to the stack.
const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
// Find the instruction past the last instruction that saves a callee-saved
// register to the stack.
const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
for (unsigned i = 0; i < CSI.size(); ++i)
++MBBI;
for (unsigned i = 0; i < CSI.size(); ++i)
++MBBI;
// if framepointer enabled, set it to point to the stack pointer.
if (hasFP(MF))
// Insert instruction "move $fp, $sp" at this location.
BuildMI(MBB, MBBI, dl, TII.get(Mips::ADDu), Mips::FP)
.addReg(Mips::SP).addReg(Mips::ZERO);
}
// Restore GP from the saved stack location
if (MipsFI->needGPSaveRestore())
BuildMI(MBB, MBBI, dl, TII.get(Mips::CPRESTORE))
.addImm(MFI->getObjectOffset(MipsFI->getGPFI()));
// EH Frame infomation.
MachineModuleInfo &MMI = MF.getMMI();
std::vector<MachineMove> &Moves = MMI.getFrameMoves();
MCSymbol *FrameLabel = MMI.getContext().CreateTempSymbol();
BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::PROLOG_LABEL)).addSym(FrameLabel);
if (hasFP(MF)) {
MachineLocation SPDst(Mips::FP);
MachineLocation SPSrc(Mips::SP);
Moves.push_back(MachineMove(FrameLabel, SPDst, SPSrc));
}
if (StackSize) {
MachineLocation SPDst(MachineLocation::VirtualFP);
MachineLocation SPSrc(MachineLocation::VirtualFP, -StackSize);
Moves.push_back(MachineMove(FrameLabel, SPDst, SPSrc));
}
for (std::vector<CalleeSavedInfo>::const_iterator I = CSI.begin(),
E = CSI.end(); I != E; ++I) {
int64_t Offset = MFI->getObjectOffset(I->getFrameIdx());
MachineLocation CSDst(MachineLocation::VirtualFP, Offset);
MachineLocation CSSrc(I->getReg());
Moves.push_back(MachineMove(FrameLabel, CSDst, CSSrc));
}
}
void MipsFrameLowering::emitEpilogue(MachineFunction &MF,
@@ -243,6 +268,13 @@ void MipsFrameLowering::emitEpilogue(MachineFunction &MF,
}
}
void
MipsFrameLowering::getInitialFrameState(std::vector<MachineMove> &Moves) const {
MachineLocation Dst(MachineLocation::VirtualFP);
MachineLocation Src(Mips::SP, 0);
Moves.push_back(MachineMove(0, Dst, Src));
}
void MipsFrameLowering::
processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
RegScavenger *RS) const {