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| author | Jakub Jelinek <jakub@redhat.com> | 2019-02-05 16:38:57 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2019-02-05 16:38:57 +0100 |
| commit | 7356fbde50dd4bfd55eaa0bed31b31da55d1461c (patch) | |
| tree | 7e1963ea7a68f515f1a35d79294711996b35c81e /gcc/combine.c | |
| parent | cff2ddc9c7ece6413e77625e58edc71b88bb58bb (diff) | |
| download | gcc-7356fbde50dd4bfd55eaa0bed31b31da55d1461c.zip gcc-7356fbde50dd4bfd55eaa0bed31b31da55d1461c.tar.gz gcc-7356fbde50dd4bfd55eaa0bed31b31da55d1461c.tar.bz2 | |
re PR rtl-optimization/89195 (Corrupted stack offset after combine)
PR rtl-optimization/89195
* combine.c (make_extraction): For MEMs, don't extract bytes outside
of the original MEM.
* gcc.c-torture/execute/pr89195.c: New test.
From-SVN: r268542
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 7e1992f..a249248 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -7687,6 +7687,7 @@ make_extraction (machine_mode mode, rtx inner, HOST_WIDE_INT pos, /* We can't do this if we are widening INNER_MODE (it may not be aligned, for one thing). */ && !paradoxical_subreg_p (tmode, inner_mode) + && known_le (pos + len, GET_MODE_PRECISION (is_mode)) && (inner_mode == tmode || (! mode_dependent_address_p (XEXP (inner, 0), MEM_ADDR_SPACE (inner)) |