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| author | Richard Biener <rguenther@suse.de> | 2019-01-30 12:41:13 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2019-01-30 12:41:13 +0000 |
| commit | 79977c82ff9ef0a79229a57277feac3cbcc17a83 (patch) | |
| tree | 689724d088ee83d8265fbd0cf2e7dce51105eeeb /gcc/tree-ssa-loop-im.c | |
| parent | 8c11f2693e3f55d7fbf37642c3e75d03a9e58013 (diff) | |
| download | gcc-79977c82ff9ef0a79229a57277feac3cbcc17a83.zip gcc-79977c82ff9ef0a79229a57277feac3cbcc17a83.tar.gz gcc-79977c82ff9ef0a79229a57277feac3cbcc17a83.tar.bz2 | |
re PR tree-optimization/89111 (wrong code at -O1 and above on x86_64-linux-gnu)
2019-01-30 Richard Biener <rguenther@suse.de>
PR tree-optimization/89111
* tree-ssa-loop-im.c (gather_mem_refs_stmt): Restrict
canonicalization to appropriately sized access types.
* gcc.dg/torture/pr89111.c: New testcase.
From-SVN: r268388
Diffstat (limited to 'gcc/tree-ssa-loop-im.c')
| -rw-r--r-- | gcc/tree-ssa-loop-im.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/tree-ssa-loop-im.c b/gcc/tree-ssa-loop-im.c index d8a8440..631dd90 100644 --- a/gcc/tree-ssa-loop-im.c +++ b/gcc/tree-ssa-loop-im.c @@ -1472,6 +1472,11 @@ gather_mem_refs_stmt (struct loop *loop, gimple *stmt) && aor.max_size.is_constant (&max_size) && size == max_size && (size % BITS_PER_UNIT) == 0 + /* We're canonicalizing to a MEM where TYPE_SIZE specifies the + size. Make sure this is consistent with the extraction. */ + && poly_int_tree_p (TYPE_SIZE (TREE_TYPE (*mem))) + && known_eq (wi::to_poly_offset (TYPE_SIZE (TREE_TYPE (*mem))), + aor.size) && (mem_base = get_addr_base_and_unit_offset (aor.ref, &mem_off))) { hash = iterative_hash_expr (ao_ref_base (&aor), 0); |