diff options
Diffstat (limited to 'include/llvm/CodeGen/LiveInterval.h')
| -rw-r--r-- | include/llvm/CodeGen/LiveInterval.h | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/include/llvm/CodeGen/LiveInterval.h b/include/llvm/CodeGen/LiveInterval.h index 5fd4d3d..2288c1a 100644 --- a/include/llvm/CodeGen/LiveInterval.h +++ b/include/llvm/CodeGen/LiveInterval.h @@ -100,6 +100,7 @@ namespace llvm { bool isDefByCopy() const { return copy != 0; } /// Returns true if one or more kills are PHI nodes. + /// Obsolete, do not use! bool hasPHIKill() const { return flags & HAS_PHI_KILL; } /// Set the PHI kill flag on this value. void setHasPHIKill(bool hasKill) { @@ -313,7 +314,6 @@ namespace llvm { /// RenumberValues - Renumber all values in order of appearance and remove /// unused values. - /// Recalculate phi-kill flags in case any phi-def values were removed. void RenumberValues(LiveIntervals &lis); /// isOnlyLROfValNo - Return true if the specified live range is the only @@ -411,6 +411,14 @@ namespace llvm { return I == end() ? 0 : I->valno; } + /// getVNInfoBefore - Return the VNInfo that is live up to but not + /// necessarilly including Idx, or NULL. Use this to find the reaching def + /// used by an instruction at this SlotIndex position. + VNInfo *getVNInfoBefore(SlotIndex Idx) const { + const_iterator I = FindLiveRangeContaining(Idx.getPrevSlot()); + return I == end() ? 0 : I->valno; + } + /// FindLiveRangeContaining - Return an iterator to the live range that /// contains the specified index, or end() if there is none. iterator FindLiveRangeContaining(SlotIndex Idx) { @@ -452,10 +460,10 @@ namespace llvm { addRangeFrom(LR, ranges.begin()); } - /// extendInBlock - If this interval is live before UseIdx in the basic - /// block that starts at StartIdx, extend it to be live at UseIdx and return - /// the value. If there is no live range before UseIdx, return NULL. - VNInfo *extendInBlock(SlotIndex StartIdx, SlotIndex UseIdx); + /// extendInBlock - If this interval is live before Kill in the basic block + /// that starts at StartIdx, extend it to be live up to Kill, and return + /// the value. If there is no live range before Kill, return NULL. + VNInfo *extendInBlock(SlotIndex StartIdx, SlotIndex Kill); /// join - Join two live intervals (this, and other) together. This applies /// mappings to the value numbers in the LHS/RHS intervals as specified. If |
