diff options
Diffstat (limited to 'gcc/tree-into-ssa.c')
| -rw-r--r-- | gcc/tree-into-ssa.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/gcc/tree-into-ssa.c b/gcc/tree-into-ssa.c index 2f5ac69251e..5a04ee7924f 100644 --- a/gcc/tree-into-ssa.c +++ b/gcc/tree-into-ssa.c @@ -2869,6 +2869,46 @@ mark_virtual_operands_for_renaming (struct function *fn) fn->gimple_df->rename_vops = 1; } +/* Replace all uses of NAME by underlying variable and mark it + for renaming. This assumes the defining statement of NAME is + going to be removed. */ + +void +mark_virtual_operand_for_renaming (tree name) +{ + tree name_var = SSA_NAME_VAR (name); + bool used = false; + imm_use_iterator iter; + use_operand_p use_p; + gimple stmt; + + gcc_assert (VAR_DECL_IS_VIRTUAL_OPERAND (name_var)); + FOR_EACH_IMM_USE_STMT (stmt, iter, name) + { + FOR_EACH_IMM_USE_ON_STMT (use_p, iter) + SET_USE (use_p, name_var); + used = true; + } + if (used) + mark_virtual_operands_for_renaming (cfun); +} + +/* Replace all uses of the virtual PHI result by its underlying variable + and mark it for renaming. This assumes the PHI node is going to be + removed. */ + +void +mark_virtual_phi_result_for_renaming (gimple phi) +{ + if (dump_file && (dump_flags & TDF_DETAILS)) + { + fprintf (dump_file, "Marking result for renaming : "); + print_gimple_stmt (dump_file, phi, 0, TDF_SLIM); + fprintf (dump_file, "\n"); + } + + mark_virtual_operand_for_renaming (gimple_phi_result (phi)); +} /* Return true if there is any work to be done by update_ssa for function FN. */ |