https://gcc.gnu.org/g:48eda34624fe5de050ae5ee38a360155ab188c39
commit r15-5998-g48eda34624fe5de050ae5ee38a360155ab188c39
Author: Andrew MacLeod <amacl...@redhat.com>
Date: Mon Nov 25 09:50:33 2024 -0500
Do not calculate an entry range for invariant names.
If an SSA_NAME is invariant, do not calculate an on_entry value.
PR tree-optimization/117467
* gimple-range-cache.cc (ranger_cache::entry_range): Do not
invoke range_from_dom for invariant ssa-names.
Diff:
---
gcc/gimple-range-cache.cc | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/gcc/gimple-range-cache.cc b/gcc/gimple-range-cache.cc
index 8b7189eb5b83..c9016fe988db 100644
--- a/gcc/gimple-range-cache.cc
+++ b/gcc/gimple-range-cache.cc
@@ -1183,6 +1183,13 @@ ranger_cache::entry_range (vrange &r, tree name,
basic_block bb,
return;
}
+ // If NAME is invariant, simply return the defining range.
+ if (!gori ().has_edge_range_p (name))
+ {
+ range_of_def (r, name);
+ return;
+ }
+
// Look for the on-entry value of name in BB from the cache.
// Otherwise pick up the best available global value.
if (!m_on_entry.get_bb_range (r, name, bb))
