+ // LiveOutSeen - Indexed by MBB->getNumber(), a bit is set for each valid
+ // entry in LiveOutCache.
+ BitVector LiveOutSeen;
+
+ /// LiveInBlock - Info for updateSSA() about a block where a register is
+ /// live-in.
+ /// The updateSSA caller provides DomNode and Kill inside MBB, updateSSA()
+ /// adds the computed live-in value.
+ struct LiveInBlock {
+ // Dominator tree node for the block.
+ // Cleared by updateSSA when the final value has been determined.
+ MachineDomTreeNode *DomNode;
+
+ // Live-in value filled in by updateSSA once it is known.
+ VNInfo *Value;
+
+ // Position in block where the live-in range ends, or SlotIndex() if the
+ // range passes through the block.
+ SlotIndex Kill;
+
+ LiveInBlock(MachineDomTreeNode *node) : DomNode(node), Value(0) {}
+ };
+
+ /// LiveInBlocks - List of live-in blocks used by findReachingDefs() and
+ /// updateSSA(). This list is usually empty, it exists here to avoid frequent
+ /// reallocations.
+ SmallVector<LiveInBlock, 16> LiveInBlocks;
+