diff options
| -rw-r--r-- | lib/Target/ARM/ARMBaseInstrInfo.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/Target/ARM/ARMBaseInstrInfo.cpp b/lib/Target/ARM/ARMBaseInstrInfo.cpp index 69e10baafb..223cbe75e0 100644 --- a/lib/Target/ARM/ARMBaseInstrInfo.cpp +++ b/lib/Target/ARM/ARMBaseInstrInfo.cpp @@ -1435,8 +1435,12 @@ bool llvm::rewriteARMFrameIndex(MachineInstr &MI, unsigned FrameRegIdx, // Otherwise, it didn't fit. Pull in what we can to simplify the immed. ImmedOffset = ImmedOffset & Mask; - if (isSub) - ImmedOffset |= 1 << NumBits; + if (isSub) { + if (AddrMode == ARMII::AddrMode_i12) + ImmedOffset = -ImmedOffset; + else + ImmedOffset |= 1 << NumBits; + } ImmOp.ChangeToImmediate(ImmedOffset); Offset &= ~(Mask*Scale); } |