diff options
Diffstat (limited to 'gcc/config/gcn/gcn.cc')
| -rw-r--r-- | gcc/config/gcn/gcn.cc | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/config/gcn/gcn.cc b/gcc/config/gcn/gcn.cc index 10f740578c4..a2d852187bf 100644 --- a/gcc/config/gcn/gcn.cc +++ b/gcc/config/gcn/gcn.cc @@ -5887,6 +5887,7 @@ gcn_md_reorg (void) attr_type itype = get_attr_type (insn); attr_unit iunit = get_attr_unit (insn); attr_delayeduse idelayeduse = get_attr_delayeduse (insn); + int ivccwait = get_attr_vccwait (insn); HARD_REG_SET ireads, iwrites; CLEAR_HARD_REG_SET (ireads); CLEAR_HARD_REG_SET (iwrites); @@ -5964,6 +5965,14 @@ gcn_md_reorg (void) && ((hard_reg_set_intersect_p (prev_insn->reads, iwrites)))) nops_rqd = 1 - prev_insn->age; + + /* Instruction that requires VCC is not written too close before + using it. */ + if (prev_insn->age < ivccwait + && (hard_reg_set_intersect_p + (prev_insn->writes, + reg_class_contents[(int)VCC_CONDITIONAL_REG]))) + nops_rqd = ivccwait - prev_insn->age; } /* Insert the required number of NOPs. */ |