diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86FrameLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86FrameLowering.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/llvm/lib/Target/X86/X86FrameLowering.cpp b/llvm/lib/Target/X86/X86FrameLowering.cpp index 7318e788a22..9f5a0c6134c 100644 --- a/llvm/lib/Target/X86/X86FrameLowering.cpp +++ b/llvm/lib/Target/X86/X86FrameLowering.cpp @@ -156,8 +156,10 @@ static unsigned findDeadCallerSavedReg(MachineBasicBlock &MBB, const TargetRegisterClass &AvailableRegs = *TRI->getGPRsForTailCall(*MF); - unsigned Opc = MBBI->getOpcode(); - switch (Opc) { + if (MBBI == MBB.end()) + return 0; + + switch (MBBI->getOpcode()) { default: return 0; case TargetOpcode::PATCHABLE_RET: case X86::RET: |
