diff options
Diffstat (limited to 'gcc-4.9/gcc/sched-deps.c')
| -rw-r--r-- | gcc-4.9/gcc/sched-deps.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/sched-deps.c b/gcc-4.9/gcc/sched-deps.c index df29bd30b..1d4700733 100644 --- a/gcc-4.9/gcc/sched-deps.c +++ b/gcc-4.9/gcc/sched-deps.c @@ -4747,6 +4747,24 @@ find_inc (struct mem_inc_info *mii, bool backwards) goto next; } } + + /* The inc instruction could have clobbers, make sure those + registers are not used in mem insn. */ + for (def_rec = DF_INSN_DEFS (mii->inc_insn); *def_rec; def_rec++) + if (!reg_overlap_mentioned_p (DF_REF_REG (*def_rec), mii->mem_reg0)) + { + df_ref *use_rec; + for (use_rec = DF_INSN_USES (mii->mem_insn); *use_rec; use_rec++) + if (reg_overlap_mentioned_p (DF_REF_REG (*def_rec), + DF_REF_REG (*use_rec))) + { + if (sched_verbose >= 5) + fprintf (sched_dump, + "inc clobber used in store failure.\n"); + goto next; + } + } + newaddr = mii->inc_input; if (mii->mem_index != NULL_RTX) newaddr = gen_rtx_PLUS (GET_MODE (newaddr), newaddr, |