+ /// GetLiveOutRegInfo - Gets LiveOutInfo for a register, returning NULL if the
+ /// register is a PHI destination and the PHI's LiveOutInfo is not valid.
+ const LiveOutInfo *GetLiveOutRegInfo(unsigned Reg) {
+ if (!LiveOutRegInfo.inBounds(Reg))
+ return NULL;
+
+ const LiveOutInfo *LOI = &LiveOutRegInfo[Reg];
+ if (!LOI->IsValid)
+ return NULL;
+
+ return LOI;
+ }
+
+ /// GetLiveOutRegInfo - Gets LiveOutInfo for a register, returning NULL if the
+ /// register is a PHI destination and the PHI's LiveOutInfo is not valid. If
+ /// the register's LiveOutInfo is for a smaller bit width, it is extended to
+ /// the larger bit width by zero extension. The bit width must be no smaller
+ /// than the LiveOutInfo's existing bit width.
+ const LiveOutInfo *GetLiveOutRegInfo(unsigned Reg, unsigned BitWidth);
+
+ /// AddLiveOutRegInfo - Adds LiveOutInfo for a register.
+ void AddLiveOutRegInfo(unsigned Reg, unsigned NumSignBits,
+ const APInt &KnownZero, const APInt &KnownOne) {
+ // Only install this information if it tells us something.
+ if (NumSignBits == 1 && KnownZero == 0 && KnownOne == 0)
+ return;
+
+ LiveOutRegInfo.grow(Reg);
+ LiveOutInfo &LOI = LiveOutRegInfo[Reg];
+ LOI.NumSignBits = NumSignBits;
+ LOI.KnownOne = KnownOne;
+ LOI.KnownZero = KnownZero;
+ }
+
+ /// ComputePHILiveOutRegInfo - Compute LiveOutInfo for a PHI's destination
+ /// register based on the LiveOutInfo of its operands.
+ void ComputePHILiveOutRegInfo(const PHINode*);
+
+ /// InvalidatePHILiveOutRegInfo - Invalidates a PHI's LiveOutInfo, to be
+ /// called when a block is visited before all of its predecessors.
+ void InvalidatePHILiveOutRegInfo(const PHINode *PN) {
+ // PHIs with no uses have no ValueMap entry.
+ DenseMap<const Value*, unsigned>::const_iterator It = ValueMap.find(PN);
+ if (It == ValueMap.end())
+ return;
+
+ unsigned Reg = It->second;
+ LiveOutRegInfo.grow(Reg);
+ LiveOutRegInfo[Reg].IsValid = false;
+ }
+
+ /// setArgumentFrameIndex - Record frame index for the byval