The path_range_query constructor that takes an edge is really a convenience function for the loop-ch pass. It feels wrong to pollute the API with such a specialized function that could be done with a small inline function closer to its user.
As an added benefit, we remove one use of reset_path. The last remaining one is the forward threader one. OK? gcc/ChangeLog: * gimple-range-path.cc (path_range_query::path_range_query): Remove constructor that takes edge. * gimple-range-path.h (class path_range_query): Same. * tree-ssa-loop-ch.cc (edge_range_query): New. (entry_loop_condition_is_static): Call edge_range_query. --- gcc/gimple-range-path.cc | 15 --------------- gcc/gimple-range-path.h | 1 - gcc/tree-ssa-loop-ch.cc | 17 +++++++++++++++-- 3 files changed, 15 insertions(+), 18 deletions(-) diff --git a/gcc/gimple-range-path.cc b/gcc/gimple-range-path.cc index ba7c2ed9b47..bc2879c0c57 100644 --- a/gcc/gimple-range-path.cc +++ b/gcc/gimple-range-path.cc @@ -59,21 +59,6 @@ path_range_query::path_range_query (gimple_ranger &ranger, bool resolve) m_oracle = new path_oracle (m_ranger.oracle ()); } -path_range_query::path_range_query (gimple_ranger &ranger, - edge e, - bool resolve) - : m_cache (new ssa_global_cache), - m_has_cache_entry (BITMAP_ALLOC (NULL)), - m_ranger (ranger), - m_resolve (resolve) -{ - m_oracle = new path_oracle (m_ranger.oracle ()); - auto_vec<basic_block> bbs (2); - bbs.quick_push (e->dest); - bbs.quick_push (e->src); - reset_path (bbs, NULL); -} - path_range_query::~path_range_query () { delete m_oracle; diff --git a/gcc/gimple-range-path.h b/gcc/gimple-range-path.h index 483fde0d431..9f2d6d92dab 100644 --- a/gcc/gimple-range-path.h +++ b/gcc/gimple-range-path.h @@ -37,7 +37,6 @@ public: const bitmap_head *dependencies = NULL, bool resolve = true); path_range_query (gimple_ranger &ranger, bool resolve = true); - path_range_query (gimple_ranger &ranger, edge e, bool resolve = true); virtual ~path_range_query (); void reset_path (const vec<basic_block> &, const bitmap_head *dependencies); bool range_of_expr (vrange &r, tree name, gimple * = NULL) override; diff --git a/gcc/tree-ssa-loop-ch.cc b/gcc/tree-ssa-loop-ch.cc index 96816b89287..9c316887d5b 100644 --- a/gcc/tree-ssa-loop-ch.cc +++ b/gcc/tree-ssa-loop-ch.cc @@ -45,6 +45,20 @@ along with GCC; see the file COPYING3. If not see increases effectiveness of code motion optimizations, and reduces the need for loop preconditioning. */ +/* Given a path through edge E, whose last statement is COND, return + the range of the solved conditional in R. */ + +static void +edge_range_query (irange &r, edge e, gcond *cond, gimple_ranger &ranger) +{ + auto_vec<basic_block> path (2); + path.safe_push (e->dest); + path.safe_push (e->src); + path_range_query query (ranger, path); + if (!query.range_of_stmt (r, cond)) + r.set_varying (boolean_type_node); +} + /* Return true if the condition on the first iteration of the loop can be statically determined. */ @@ -72,8 +86,7 @@ entry_loop_condition_is_static (class loop *l, gimple_ranger *ranger) desired_static_value = boolean_true_node; int_range<2> r; - path_range_query query (*ranger, e); - query.range_of_stmt (r, last); + edge_range_query (r, e, last, *ranger); return r == int_range<2> (desired_static_value, desired_static_value); } -- 2.37.1