Recalculates register liveness from an RDF data-flow graph.
Declared in <llvm/CodeGen/RDFLiveness.h>
struct Liveness;Computes block live-ins and kill flags from reaching definitions and reached uses in the graph.
| Name | Description |
|---|---|
LiveMapType | Map from basic block to the aggregate of registers live in that block. |
NodeRef | Pair of a reference node id and the lane mask of the referenced register. |
NodeRefSet | Unordered set of node-reference pairs. |
RefMap | Map from register id to the set of node references using that register. |
| Name | Description |
|---|---|
Liveness [constructor] | Construct a liveness analyzer for machine register info mri and data-flow graph g. |
computeLiveIns | Compute block live-ins from the data-flow graph and dominance frontier. |
computePhiInfo | Compute the map of real uses reached by each phi definition. |
getAllReachedUses | Return all uses reached by definition DefA for register RefRR. |
getAllReachingDefs | getAllReachingDefs overloads |
getAllReachingDefsRec | Recursively collect reaching definitions of RefRR past phi nodes. |
getLiveMap | getLiveMap overloads |
getNearestAliasedRef | Find the nearest reference aliased to RefRR above instruction IA. |
getRealUses | Return the map of real (non-phi) uses reached by phi node P. |
resetKills | resetKills overloads |
resetLiveIns | Replace MachineFunction live-ins with the values from the live map. |
trace | Enable or disable tracing output according to T. |