diff options
| author | Andrew MacLeod <amacleod@redhat.com> | 2022-08-03 13:55:42 -0400 |
|---|---|---|
| committer | Andrew MacLeod <amacleod@redhat.com> | 2022-08-03 14:40:55 -0400 |
| commit | 19ffb35d17474bb4dd3eb78963c28d10b5362321 (patch) | |
| tree | cd22fffececf71669149e1540995947ddee061ef | |
| parent | f0688c82ba8206a3d8960eb1d4821dc6a5f2a9f4 (diff) | |
Do not walk equivalence set in path_oracle::killing_def.
When killing a def in the path ranger, there is no need to walk the set
of existing equivalences clearing bits. An equivalence match requires
that both ssa-names have to be in each others set. As killing_def
creates a new empty set contianing only the current def, it already
ensures false equivaelnces won't happen.
PR tree-optimization/106514
* value-relation.cc (path_oracle::killing_def) Do not walk the
equivalence set clearing bits.
| -rw-r--r-- | gcc/value-relation.cc | 11 |
1 files changed, 1 insertions, 10 deletions
diff --git a/gcc/value-relation.cc b/gcc/value-relation.cc index a447021214f..3f0957ccdd6 100644 --- a/gcc/value-relation.cc +++ b/gcc/value-relation.cc @@ -1400,16 +1400,7 @@ path_oracle::killing_def (tree ssa) unsigned v = SSA_NAME_VERSION (ssa); bitmap_set_bit (m_killed_defs, v); - - // Walk the equivalency list and remove SSA from any equivalencies. - if (bitmap_bit_p (m_equiv.m_names, v)) - { - for (equiv_chain *ptr = m_equiv.m_next; ptr; ptr = ptr->m_next) - if (bitmap_bit_p (ptr->m_names, v)) - bitmap_clear_bit (ptr->m_names, v); - } - else - bitmap_set_bit (m_equiv.m_names, v); + bitmap_set_bit (m_equiv.m_names, v); // Now add an equivalency with itself so we don't look to the root oracle. bitmap b = BITMAP_ALLOC (&m_bitmaps); |