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author | Anton Korobeynikov <asl@math.spbu.ru> | 2009-07-16 14:09:56 +0000 |
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committer | Anton Korobeynikov <asl@math.spbu.ru> | 2009-07-16 14:09:56 +0000 |
commit | 5a11e02fbd7f0df98338c75cd468c42d29ef16e4 (patch) | |
tree | 68c6b687ca8e911e750d000735d9e0e620552bc8 /lib/Target/SystemZ/SystemZRegisterInfo.cpp | |
parent | 720e3b00b869950bdc09ad065d92174772903da0 (diff) | |
download | external_llvm-5a11e02fbd7f0df98338c75cd468c42d29ef16e4.zip external_llvm-5a11e02fbd7f0df98338c75cd468c42d29ef16e4.tar.gz external_llvm-5a11e02fbd7f0df98338c75cd468c42d29ef16e4.tar.bz2 |
Fix fallout from 12-bit stuff landing: decide whether 20 bit displacements are needed during elimination of frame indexes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75989 91177308-0d34-0410-b5e6-96231b3b80d8
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 c30d5ef..a65cec1 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); } |