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| author | Alexandre Oliva <aoliva@redhat.com> | 2005-07-14 21:11:39 +0000 |
|---|---|---|
| committer | Ulrich Weigand <uweigand@gcc.gnu.org> | 2005-07-14 21:11:39 +0000 |
| commit | 704b6cb548b6e3ad7708729ec65d05fb8331f513 (patch) | |
| tree | d0adc2d3afd0ad88987bfdfcdc295897729c0770 /gcc/loop.c | |
| parent | a771c4b3eab2112264572e195832935b8e62c999 (diff) | |
| download | gcc-704b6cb548b6e3ad7708729ec65d05fb8331f513.zip gcc-704b6cb548b6e3ad7708729ec65d05fb8331f513.tar.gz gcc-704b6cb548b6e3ad7708729ec65d05fb8331f513.tar.bz2 | |
re PR target/20126 (Inlined memcmp makes one argument null on entry)
2005-07-14 Alexandre Oliva <aoliva@redhat.com>
Ulrich Weigand <uweigand@de.ibm.com>
PR target/20126
* loop.c (loop_givs_rescan): Do not ICE if unable to reduce an IV
in some insn.
Co-Authored-By: Ulrich Weigand <uweigand@de.ibm.com>
From-SVN: r102033
Diffstat (limited to 'gcc/loop.c')
| -rw-r--r-- | gcc/loop.c | 22 |
1 files changed, 17 insertions, 5 deletions
@@ -5514,11 +5514,23 @@ loop_givs_rescan (struct loop *loop, struct iv_class *bl, rtx *reg_map) rtx reg, seq; start_sequence (); reg = force_reg (v->mode, *v->location); - seq = get_insns (); - end_sequence (); - loop_insn_emit_before (loop, 0, v->insn, seq); - if (!validate_change_maybe_volatile (v->insn, v->location, reg)) - gcc_unreachable (); + if (validate_change_maybe_volatile (v->insn, v->location, reg)) + { + seq = get_insns (); + end_sequence (); + loop_insn_emit_before (loop, 0, v->insn, seq); + } + else + { + end_sequence (); + if (loop_dump_stream) + fprintf (loop_dump_stream, + "unable to reduce iv in insn %d\n", + INSN_UID (v->insn)); + bl->all_reduced = 0; + v->ignore = 1; + continue; + } } } else if (v->replaceable) |