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author | Rong Xu <xur@google.com> | 2014-09-02 15:29:57 -0700 |
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committer | Rong Xu <xur@google.com> | 2014-09-02 15:29:57 -0700 |
commit | e97c99f15937e5762a973b25192aab824126a6d3 (patch) | |
tree | 7f0be3ff7c7d976af06887dc50accd68f7630a7f /gcc-4.9/gcc/sched-deps.c | |
parent | f1c18afafc2b321465ae6b07ede127095942d7dc (diff) | |
download | toolchain_gcc-e97c99f15937e5762a973b25192aab824126a6d3.tar.gz toolchain_gcc-e97c99f15937e5762a973b25192aab824126a6d3.tar.bz2 toolchain_gcc-e97c99f15937e5762a973b25192aab824126a6d3.zip |
[gcc-4.9] Merge svn r214745 from google/gcc-4_9 branch.
Merge gcc-4_9 source r214745 from google/gcc-4_9 branch.
Change-Id: Ie6fa0fd72f4b4eec3adc4db4bb922e652d1c2605
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, |