diff options
| author | Jim Grosbach <grosbach@apple.com> | 2011-06-13 21:18:25 +0000 |
|---|---|---|
| committer | Jim Grosbach <grosbach@apple.com> | 2011-06-13 21:18:25 +0000 |
| commit | 7980f61f5ff408b947474cd1c3715896d28ea578 (patch) | |
| tree | 0a898c39a64df69c1c6f9c1d0687d499dbcc5390 /lib/Target/ARM/Thumb1FrameLowering.cpp | |
| parent | ff276b40f0bfd72938f964061c13ed18be7c008f (diff) | |
Fix coordination for using R4 in Thumb1 as a scratch for SP restore.
The logic for reserving R4 for use as a scratch needs to match that for
actually using it. Also, it's not necessary for immediate <=508, so adjust
the value checked.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132934 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/ARM/Thumb1FrameLowering.cpp')
| -rw-r--r-- | lib/Target/ARM/Thumb1FrameLowering.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/Target/ARM/Thumb1FrameLowering.cpp b/lib/Target/ARM/Thumb1FrameLowering.cpp index dee3d27820..e56d48168c 100644 --- a/lib/Target/ARM/Thumb1FrameLowering.cpp +++ b/lib/Target/ARM/Thumb1FrameLowering.cpp @@ -136,8 +136,8 @@ void Thumb1FrameLowering::emitPrologue(MachineFunction &MF) const { BuildMI(MBB, MBBI, dl, TII.get(ARM::tADDrSPi), FramePtr) .addFrameIndex(FramePtrSpillFI).addImm(0) .setMIFlags(MachineInstr::FrameSetup); - if (NumBytes > 7) - // If offset is > 7 then sp cannot be adjusted in a single instruction, + if (NumBytes > 508) + // If offset is > 508 then sp cannot be adjusted in a single instruction, // try restoring from fp instead. AFI->setShouldRestoreSPFromFP(true); } |