diff options
Diffstat (limited to 'lib/Target/SystemZ/SystemZRegisterInfo.cpp')
| -rw-r--r-- | lib/Target/SystemZ/SystemZRegisterInfo.cpp | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/lib/Target/SystemZ/SystemZRegisterInfo.cpp b/lib/Target/SystemZ/SystemZRegisterInfo.cpp index c30d5efd4b..a65cec15c9 100644 --- a/lib/Target/SystemZ/SystemZRegisterInfo.cpp +++ b/lib/Target/SystemZ/SystemZRegisterInfo.cpp @@ -12,6 +12,7 @@ //===----------------------------------------------------------------------===// #include "SystemZ.h" +#include "SystemZInstrInfo.h" #include "SystemZMachineFunctionInfo.h" #include "SystemZRegisterInfo.h" #include "SystemZSubtarget.h" @@ -27,7 +28,7 @@ using namespace llvm; SystemZRegisterInfo::SystemZRegisterInfo(SystemZTargetMachine &tm, - const TargetInstrInfo &tii) + const SystemZInstrInfo &tii) : SystemZGenRegisterInfo(SystemZ::ADJCALLSTACKUP, SystemZ::ADJCALLSTACKDOWN), TM(tm), TII(tii) { } @@ -124,9 +125,14 @@ void SystemZRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II, // displacement field. MI.getOperand(i).ChangeToRegister(BasePtr, false); - // Offset is a 20-bit integer. + // Offset is a either 12-bit unsigned or 20-bit signed integer. // FIXME: handle "too long" displacements. int Offset = getFrameIndexOffset(MF, FrameIndex) + MI.getOperand(i+1).getImm(); + + // Check whether displacement is too long to fit into 12 bit zext field. + if (Offset < 0 || Offset >= 4096) + MI.setDesc(TII.getLongDispOpc(MI.getOpcode())); + MI.getOperand(i+1).ChangeToImmediate(Offset); } |