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| author | Jakub Jelinek <jakub@redhat.com> | 2014-08-12 23:24:40 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2014-08-12 23:24:40 +0200 |
| commit | c7cf969cdbc688e0e6d486cf62e85be1e4ca4218 (patch) | |
| tree | 1e88256bef0a3bccd655c38fe76b924cd24e59c5 /gcc/sched-deps.c | |
| parent | 06a1d02efd4a977fd06774b960ce2d21104ef5e0 (diff) | |
| download | gcc-c7cf969cdbc688e0e6d486cf62e85be1e4ca4218.zip gcc-c7cf969cdbc688e0e6d486cf62e85be1e4ca4218.tar.gz gcc-c7cf969cdbc688e0e6d486cf62e85be1e4ca4218.tar.bz2 | |
re PR target/62025 (Miscompilation of openssl sha512.c)
PR target/62025
* sched-deps.c (find_inc): Check if inc_insn doesn't clobber
any registers that are used in mem_insn.
From-SVN: r213887
Diffstat (limited to 'gcc/sched-deps.c')
| -rw-r--r-- | gcc/sched-deps.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c index 51c1a01..049927f 100644 --- a/gcc/sched-deps.c +++ b/gcc/sched-deps.c @@ -4751,6 +4751,24 @@ find_inc (struct mem_inc_info *mii, bool backwards) "inc conflicts with store failure.\n"); goto next; } + + /* The inc instruction could have clobbers, make sure those + registers are not used in mem insn. */ + FOR_EACH_INSN_DEF (def, mii->inc_insn) + if (!reg_overlap_mentioned_p (DF_REF_REG (def), mii->mem_reg0)) + { + df_ref use; + FOR_EACH_INSN_USE (use, mii->mem_insn) + if (reg_overlap_mentioned_p (DF_REF_REG (def), + DF_REF_REG (use))) + { + 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, |