Turns out AnalyzeBranch can modify the mbb being analyzed. This is a nasty
suprise to some callers, e.g. register coalescer. For now, add an parameter
that tells AnalyzeBranch whether it's safe to modify the mbb. A better
solution is out there, but I don't have time to deal with it right now.
llvm-svn: 64124
diff --git a/llvm/lib/Target/ARM/ARMInstrInfo.h b/llvm/lib/Target/ARM/ARMInstrInfo.h
index 043f6e5..13ff3fe 100644
--- a/llvm/lib/Target/ARM/ARMInstrInfo.h
+++ b/llvm/lib/Target/ARM/ARMInstrInfo.h
@@ -172,7 +172,8 @@
// Branch analysis.
virtual bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
MachineBasicBlock *&FBB,
- SmallVectorImpl<MachineOperand> &Cond) const;
+ SmallVectorImpl<MachineOperand> &Cond,
+ bool AllowModify) const;
virtual unsigned RemoveBranch(MachineBasicBlock &MBB) const;
virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
MachineBasicBlock *FBB,