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Implement cfi_def_cfa_offset. "Make check" test case for this comming in the 

next few days but it's already tested a lot from test-suite and works fine.
This patch completes almost 100% pass of test-suite for mips 16.

llvm-svn: 170674
This commit is contained in:
Reed Kotler 2012-12-20 06:59:37 +00:00
parent 8965d24a2a
commit d11acc7dc0
1 changed files with 27 additions and 0 deletions
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27
llvm/lib/Target/Mips/Mips16FrameLowering.cpp
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@ -39,9 +39,36 @@ void Mips16FrameLowering::emitPrologue(MachineFunction &MF) const {
// No need to allocate space on the stack.
if (StackSize == 0 && !MFI->adjustsStack()) return;
MachineModuleInfo &MMI = MF.getMMI();
std::vector<MachineMove> &Moves = MMI.getFrameMoves();
MachineLocation DstML, SrcML;
// Adjust stack.
TII.makeFrame(Mips::SP, StackSize, MBB, MBBI);
// emit ".cfi_def_cfa_offset StackSize"
MCSymbol *AdjustSPLabel = MMI.getContext().CreateTempSymbol();
BuildMI(MBB, MBBI, dl,
TII.get(TargetOpcode::PROLOG_LABEL)).addSym(AdjustSPLabel);
DstML = MachineLocation(MachineLocation::VirtualFP);
SrcML = MachineLocation(MachineLocation::VirtualFP, -StackSize);
Moves.push_back(MachineMove(AdjustSPLabel, DstML, SrcML));
MCSymbol *CSLabel = MMI.getContext().CreateTempSymbol();
BuildMI(MBB, MBBI, dl,
TII.get(TargetOpcode::PROLOG_LABEL)).addSym(CSLabel);
DstML = MachineLocation(MachineLocation::VirtualFP, -8);
SrcML = MachineLocation(Mips::S1);
Moves.push_back(MachineMove(CSLabel, DstML, SrcML));
DstML = MachineLocation(MachineLocation::VirtualFP, -12);
SrcML = MachineLocation(Mips::S0);
Moves.push_back(MachineMove(CSLabel, DstML, SrcML));
DstML = MachineLocation(MachineLocation::VirtualFP, -4);
SrcML = MachineLocation(Mips::RA);
Moves.push_back(MachineMove(CSLabel, DstML, SrcML));
if (hasFP(MF))
BuildMI(MBB, MBBI, dl, TII.get(Mips::MoveR3216), Mips::S0)
.addReg(Mips::SP);