forked from OSchip/llvm-project
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
#ifndef ISL_TARJAN_H
|
|
#define ISL_TARJAN_H
|
|
|
|
/* Structure for representing the nodes in the graph being traversed
|
|
* using Tarjan's algorithm.
|
|
* index represents the order in which nodes are visited.
|
|
* min_index is the index of the root of a (sub)component.
|
|
* on_stack indicates whether the node is currently on the stack.
|
|
*/
|
|
struct isl_tarjan_node {
|
|
int index;
|
|
int min_index;
|
|
int on_stack;
|
|
};
|
|
|
|
/* Structure for representing the graph being traversed
|
|
* using Tarjan's algorithm.
|
|
* len is the number of nodes
|
|
* node is an array of nodes
|
|
* stack contains the nodes on the path from the root to the current node
|
|
* sp is the stack pointer
|
|
* index is the index of the last node visited
|
|
* order contains the elements of the components separated by -1
|
|
* op represents the current position in order
|
|
*/
|
|
struct isl_tarjan_graph {
|
|
int len;
|
|
struct isl_tarjan_node *node;
|
|
int *stack;
|
|
int sp;
|
|
int index;
|
|
int *order;
|
|
int op;
|
|
};
|
|
|
|
struct isl_tarjan_graph *isl_tarjan_graph_init(isl_ctx *ctx, int len,
|
|
isl_bool (*follows)(int i, int j, void *user), void *user);
|
|
void isl_tarjan_graph_free(struct isl_tarjan_graph *g);
|
|
|
|
#endif
|