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| author | Richard Biener <rguenther@suse.de> | 2018-05-23 14:01:36 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2018-05-23 14:01:36 +0000 |
| commit | 52388096c29387af5c2ac70f0a86e76bfbae2f8d (patch) | |
| tree | 39e4be87d5a7b021240e9db9ec9734722723998d | |
| parent | d71dc99078ea4009a442559028d6110e599cdc96 (diff) | |
| download | gcc-52388096c29387af5c2ac70f0a86e76bfbae2f8d.zip gcc-52388096c29387af5c2ac70f0a86e76bfbae2f8d.tar.gz gcc-52388096c29387af5c2ac70f0a86e76bfbae2f8d.tar.bz2 | |
tree-ssa-sccvn.c (vn_reference_lookup_3): Remove restriction of fixed offset from memset VN.
2018-05-23 Richard Biener <rguenther@suse.de>
* tree-ssa-sccvn.c (vn_reference_lookup_3): Remove restriction
of fixed offset from memset VN.
* gcc.dg/tree-ssa/ssa-fre-66.c: New testcase.
From-SVN: r260609
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-66.c | 11 | ||||
| -rw-r--r-- | gcc/tree-ssa-sccvn.c | 1 |
4 files changed, 20 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 09a7025..d377909 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2018-05-23 Richard Biener <rguenther@suse.de> + + * tree-ssa-sccvn.c (vn_reference_lookup_3): Remove restriction + of fixed offset from memset VN. + 2018-05-23 Bill Schmidt <wschmidt@linux.ibm.com> * gimple-ssa-strength-reduction.c (struct slsr_cand_d): Add diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index aea02b9..b3cf4b1 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2018-05-23 Richard Biener <rguenther@suse.de> + + * gcc.dg/tree-ssa/ssa-fre-66.c: New testcase. + 2018-05-23 Sudakshina Das <sudi.das@arm.com> PR target/84882 diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-66.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-66.c new file mode 100644 index 0000000..1c86a1f3 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-66.c @@ -0,0 +1,11 @@ +/* { dg-do compile } */ +/* { dg-options "-O -fdump-tree-fre1" } */ + +int foo (int i) +{ + int a[16]; + __builtin_memset (a, 42, sizeof (a)); + return a[i]; +} + +/* { dg-final { scan-tree-dump "return 707406378;" "fre1" { target { int32plus } } } } */ diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c index 96e80c7..73e8fc5 100644 --- a/gcc/tree-ssa-sccvn.c +++ b/gcc/tree-ssa-sccvn.c @@ -1962,7 +1962,6 @@ vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *vr_, || ((TREE_CODE (gimple_call_arg (def_stmt, 1)) == INTEGER_CST || (INTEGRAL_TYPE_P (vr->type) && known_eq (ref->size, 8))) && CHAR_BIT == 8 && BITS_PER_UNIT == 8 - && known_eq (ref->size, maxsize) && offset.is_constant (&offseti) && offseti % BITS_PER_UNIT == 0)) && poly_int_tree_p (gimple_call_arg (def_stmt, 2)) |