diff options
Diffstat (limited to 'lib/CodeGen/PHIElimination.h')
| -rw-r--r-- | lib/CodeGen/PHIElimination.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/CodeGen/PHIElimination.h b/lib/CodeGen/PHIElimination.h index 8188440c89..edc2d36670 100644 --- a/lib/CodeGen/PHIElimination.h +++ b/lib/CodeGen/PHIElimination.h @@ -90,7 +90,7 @@ namespace llvm { void analyzePHINodes(const MachineFunction& Fn); /// Split critical edges where necessary for good coalescer performance. - void SplitPHIEdges(MachineFunction &MF, MachineBasicBlock &MBB); + bool SplitPHIEdges(MachineFunction &MF, MachineBasicBlock &MBB); /// isLiveOut - Determine if Reg is live out from MBB, when not /// considering PHI nodes. This means that Reg is either killed by @@ -98,6 +98,12 @@ namespace llvm { bool isLiveOut(unsigned Reg, const MachineBasicBlock &MBB, LiveVariables &LV); + /// isLiveIn - Determine if Reg is live in to MBB, not considering PHI + /// source registers. This means that Reg is either killed by MBB or passes + /// through it. + bool isLiveIn(unsigned Reg, const MachineBasicBlock &MBB, + LiveVariables &LV); + /// SplitCriticalEdge - Split a critical edge from A to B by /// inserting a new MBB. Update branches in A and PHI instructions /// in B. Return the new block. |