diff options
Diffstat (limited to 'lib/Target/SystemZ/SystemZFrameInfo.cpp')
| -rw-r--r-- | lib/Target/SystemZ/SystemZFrameInfo.cpp | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/lib/Target/SystemZ/SystemZFrameInfo.cpp b/lib/Target/SystemZ/SystemZFrameInfo.cpp index 6df072228d..9d6e8a87dc 100644 --- a/lib/Target/SystemZ/SystemZFrameInfo.cpp +++ b/lib/Target/SystemZ/SystemZFrameInfo.cpp @@ -27,6 +27,15 @@ using namespace llvm; + +/// needsFP - Return true if the specified function should have a dedicated +/// frame pointer register. This is true if the function has variable sized +/// allocas or if frame pointer elimination is disabled. +bool SystemZFrameInfo::hasFP(const MachineFunction &MF) const { + const MachineFrameInfo *MFI = MF.getFrameInfo(); + return DisableFramePointerElim(MF) || MFI->hasVarSizedObjects(); +} + /// emitSPUpdate - Emit a series of instructions to increment / decrement the /// stack pointer by a constant value. static @@ -61,8 +70,6 @@ void SystemZFrameInfo::emitPrologue(MachineFunction &MF) const { MachineBasicBlock &MBB = MF.front(); // Prolog goes in entry BB const TargetFrameInfo &TFI = *MF.getTarget().getFrameInfo(); MachineFrameInfo *MFI = MF.getFrameInfo(); - const SystemZRegisterInfo *RegInfo = - static_cast<const SystemZRegisterInfo*>(MF.getTarget().getRegisterInfo()); const SystemZInstrInfo &TII = *static_cast<const SystemZInstrInfo*>(MF.getTarget().getInstrInfo()); SystemZMachineFunctionInfo *SystemZMFI = @@ -94,7 +101,7 @@ void SystemZFrameInfo::emitPrologue(MachineFunction &MF) const { emitSPUpdate(MBB, MBBI, -(int64_t)NumBytes, TII); } - if (RegInfo->hasFP(MF)) { + if (hasFP(MF)) { // Update R11 with the new base value... BuildMI(MBB, MBBI, DL, TII.get(SystemZ::MOV64rr), SystemZ::R11D) .addReg(SystemZ::R15D); |