diff options
Diffstat (limited to 'gcc/rtl-ssa')
| -rw-r--r-- | gcc/rtl-ssa/changes.cc | 31 | ||||
| -rw-r--r-- | gcc/rtl-ssa/functions.h | 2 |
2 files changed, 29 insertions, 4 deletions
diff --git a/gcc/rtl-ssa/changes.cc b/gcc/rtl-ssa/changes.cc index c48ddd2..523ad60 100644 --- a/gcc/rtl-ssa/changes.cc +++ b/gcc/rtl-ssa/changes.cc @@ -370,8 +370,11 @@ update_insn_in_place (insn_change &change) // Finalize the new list of definitions and uses in CHANGE, removing // any uses and definitions that are no longer needed, and converting // pending clobbers into actual definitions. +// +// POS gives the final position of INSN, which hasn't yet been moved into +// place. void -function_info::finalize_new_accesses (insn_change &change) +function_info::finalize_new_accesses (insn_change &change, insn_info *pos) { insn_info *insn = change.insn (); @@ -462,13 +465,34 @@ function_info::finalize_new_accesses (insn_change &change) // Add (possibly temporary) uses to m_temp_uses for each resource. // If there are multiple references to the same resource, aggregate // information in the modes and flags. + use_info *mem_use = nullptr; for (rtx_obj_reference ref : properties.refs ()) if (ref.is_read ()) { unsigned int regno = ref.regno; machine_mode mode = ref.is_reg () ? ref.mode : BLKmode; use_info *use = find_access (unshared_uses, ref.regno); - gcc_assert (use); + if (!use) + { + // For now, we only support inferring uses of mem. + gcc_assert (regno == MEM_REGNO); + + if (mem_use) + { + mem_use->record_reference (ref, false); + continue; + } + + resource_info resource { mode, regno }; + auto def = find_def (resource, pos).prev_def (pos); + auto set = safe_dyn_cast <set_info *> (def); + gcc_assert (set); + mem_use = allocate<use_info> (insn, resource, set); + mem_use->record_reference (ref, true); + m_temp_uses.safe_push (mem_use); + continue; + } + if (use->m_has_been_superceded) { // This is the first reference to the resource. @@ -656,7 +680,8 @@ function_info::change_insns (array_slice<insn_change *> changes) // Finalize the new list of accesses for the change. Don't install // them yet, so that we still have access to the old lists below. - finalize_new_accesses (change); + finalize_new_accesses (change, + placeholder ? placeholder : insn); } placeholders[i] = placeholder; } diff --git a/gcc/rtl-ssa/functions.h b/gcc/rtl-ssa/functions.h index d7da977..73690a0 100644 --- a/gcc/rtl-ssa/functions.h +++ b/gcc/rtl-ssa/functions.h @@ -265,7 +265,7 @@ private: insn_info *add_placeholder_after (insn_info *); void possibly_queue_changes (insn_change &); - void finalize_new_accesses (insn_change &); + void finalize_new_accesses (insn_change &, insn_info *); void apply_changes_to_insn (insn_change &); void init_function_data (); |