diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/gimple-predicate-analysis.cc | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/gimple-predicate-analysis.cc b/gcc/gimple-predicate-analysis.cc index a429165..ea81daa 100644 --- a/gcc/gimple-predicate-analysis.cc +++ b/gcc/gimple-predicate-analysis.cc @@ -1293,6 +1293,12 @@ predicate::use_cannot_happen (gphi *phi, unsigned opnds) use_guard = &phi_use_guard_intersection; } + basic_block phi_bb = gimple_bb (phi); + /* Find the closest dominating bb to be the control dependence root. */ + basic_block cd_root = get_immediate_dominator (CDI_DOMINATORS, phi_bb); + if (!cd_root) + return false; + /* Look for the control dependencies of all the interesting operands and build guard predicates describing them. */ unsigned n = gimple_phi_num_args (phi); @@ -1308,7 +1314,7 @@ predicate::use_cannot_happen (gphi *phi, unsigned opnds) unsigned num_calls = 0; /* Build the control dependency chain for the PHI argument... */ - if (!compute_control_dep_chain (ENTRY_BLOCK_PTR_FOR_FN (cfun), + if (!compute_control_dep_chain (cd_root, e->src, dep_chains, &num_chains, cur_chain, &num_calls)) { |