diff options
| -rw-r--r-- | lib/Target/ARM/ARMBaseRegisterInfo.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/Target/ARM/ARMBaseRegisterInfo.cpp b/lib/Target/ARM/ARMBaseRegisterInfo.cpp index a7ab3b57da..6086c1b4ba 100644 --- a/lib/Target/ARM/ARMBaseRegisterInfo.cpp +++ b/lib/Target/ARM/ARMBaseRegisterInfo.cpp @@ -654,7 +654,13 @@ ARMBaseRegisterInfo::processFunctionBeforeCalleeSavedScan(MachineFunction &MF, // adjustments also, even when the frame itself is small. if (RS && !ExtraCSSpill) { MachineFrameInfo *MFI = MF.getFrameInfo(); - if (estimateStackSize(MF, MFI) >= estimateRSStackSizeLimit(MF) + // If any of the stack slot references may be out of range of an + // immediate offset, make sure a register (or a spill slot) is + // available for the register scavenger. Note that if we're indexing + // off the frame pointer, the effective stack size is 4 bytes larger + // since the FP points to the previous FP. + if (estimateStackSize(MF, MFI) + (hasFP(MF) ? 4 : 0) + >= estimateRSStackSizeLimit(MF) || AFI->isThumb1OnlyFunction()) { // If any non-reserved CS register isn't spilled, just spill one or two // extra. That should take care of it! |