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author | Andrew MacLeod <amacleod@redhat.com> | 2023-05-23 15:11:44 -0400 |
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committer | Andrew MacLeod <amacleod@redhat.com> | 2023-05-24 08:39:58 -0400 |
commit | d8b058d3ca4ebbef5575105164417f125696f5ce (patch) | |
tree | 1b5f48b403e05757c66ec7f581c168c183e1f0db /gcc/gimple-range-cache.cc | |
parent | 29a60c13f8ed9982483b477b2c44ec1c2d2f9b1f (diff) | |
download | gcc-d8b058d3ca4ebbef5575105164417f125696f5ce.zip gcc-d8b058d3ca4ebbef5575105164417f125696f5ce.tar.gz gcc-d8b058d3ca4ebbef5575105164417f125696f5ce.tar.bz2 |
Choose better initial values for ranger.
Instead of defaulting to VARYING, fold the stmt using just global ranges.
PR tree-optimization/109695
* gimple-range-cache.cc (ranger_cache::get_global_range): Call
fold_range with global query to choose an initial value.
Diffstat (limited to 'gcc/gimple-range-cache.cc')
-rw-r--r-- | gcc/gimple-range-cache.cc | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/gcc/gimple-range-cache.cc b/gcc/gimple-range-cache.cc index 07c69ef..8ddfd94 100644 --- a/gcc/gimple-range-cache.cc +++ b/gcc/gimple-range-cache.cc @@ -951,7 +951,22 @@ ranger_cache::get_global_range (vrange &r, tree name, bool ¤t_p) || m_temporal->current_p (name, m_gori.depend1 (name), m_gori.depend2 (name)); else - m_globals.set_range (name, r); + { + // If no global value has been set and value is VARYING, fold the stmt + // using just global ranges to get a better initial value. + // After inlining we tend to decide some things are constant, so + // so not do this evaluation after inlining. + if (r.varying_p () && !cfun->after_inlining) + { + gimple *s = SSA_NAME_DEF_STMT (name); + if (gimple_get_lhs (s) == name) + { + if (!fold_range (r, s, get_global_range_query ())) + gimple_range_global (r, name); + } + } + m_globals.set_range (name, r); + } // If the existing value was not current, mark it as always current. if (!current_p) |