diff options
| -rw-r--r-- | lib/Target/ARM/Thumb1RegisterInfo.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Target/ARM/Thumb1RegisterInfo.cpp b/lib/Target/ARM/Thumb1RegisterInfo.cpp index 6215d2f..49fd3fa 100644 --- a/lib/Target/ARM/Thumb1RegisterInfo.cpp +++ b/lib/Target/ARM/Thumb1RegisterInfo.cpp @@ -854,6 +854,11 @@ void Thumb1RegisterInfo::emitEpilogue(MachineFunction &MF, } if (VARegSaveSize) { + // Unlike T2 and ARM mode, the T1 pop instruction cannot restore + // to LR, and we can't pop the value directly to the PC since + // we need to update the SP after popping the value. Therefore, we + // pop the old LR into R3 as a temporary. + // Move back past the callee-saved register restoration while (MBBI != MBB.end() && isCSRestore(MBBI, CSRegs)) ++MBBI; |