Some predicate analysis TLC
Commit Message
The following hides some internal details of compute_control_dep_chain.
Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed.
* gimple-predicate-analysis.cc (compute_control_dep_chain):
New wrapping overload.
(uninit_analysis::init_use_preds): Simplify.
(uninit_analysis::init_from_phi_def): Likewise.
---
gcc/gimple-predicate-analysis.cc | 21 ++++++++++++++-------
1 file changed, 14 insertions(+), 7 deletions(-)
@@ -1124,6 +1124,18 @@ compute_control_dep_chain (basic_block dom_bb, const_basic_block dep_bb,
return found_cd_chain;
}
+static bool
+compute_control_dep_chain (basic_block dom_bb, const_basic_block dep_bb,
+ vec<edge> cd_chains[], unsigned *num_chains,
+ unsigned in_region = 0)
+{
+ auto_vec<edge, MAX_CHAIN_LEN + 1> cur_cd_chain;
+ unsigned num_calls = 0;
+ unsigned depth = 0;
+ return compute_control_dep_chain (dom_bb, dep_bb, cd_chains, num_chains,
+ cur_cd_chain, &num_calls, in_region, depth);
+}
+
/* Implemented simplifications:
1) ((x IOR y) != 0) AND (x != 0) is equivalent to (x != 0);
@@ -1919,13 +1931,10 @@ uninit_analysis::init_use_preds (predicate &use_preds, basic_block def_bb,
Each DEP_CHAINS element is a series of edges whose conditions
are logical conjunctions. Together, the DEP_CHAINS vector is
used below to initialize an OR expression of the conjunctions. */
- unsigned num_calls = 0;
unsigned num_chains = 0;
auto_vec<edge> dep_chains[MAX_NUM_CHAINS];
- auto_vec<edge, MAX_CHAIN_LEN + 1> cur_chain;
- if (!compute_control_dep_chain (cd_root, use_bb, dep_chains, &num_chains,
- cur_chain, &num_calls))
+ if (!compute_control_dep_chain (cd_root, use_bb, dep_chains, &num_chains))
{
gcc_assert (num_chains == 0);
simple_control_dep_chain (dep_chains[0], cd_root, use_bb);
@@ -2023,14 +2032,12 @@ uninit_analysis::init_from_phi_def (gphi *phi)
unsigned num_chains = 0;
auto_vec<edge> dep_chains[MAX_NUM_CHAINS];
- auto_vec<edge, MAX_CHAIN_LEN + 1> cur_chain;
for (unsigned i = 0; i < nedges; i++)
{
edge e = def_edges[i];
- unsigned num_calls = 0;
unsigned prev_nc = num_chains;
compute_control_dep_chain (cd_root, e->src, dep_chains,
- &num_chains, cur_chain, &num_calls, in_region);
+ &num_chains, in_region);
/* Update the newly added chains with the phi operand edge. */
if (EDGE_COUNT (e->src->succs) > 1)