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| author | Richard Biener <rguenther@suse.de> | 2019-07-17 09:35:04 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2019-07-17 09:35:04 +0000 |
| commit | 9505acd8501e6c79bc4fa9ed9f1ee174462601d1 (patch) | |
| tree | b5250d388dead0757e285297d4abafbd7883ae78 /gcc | |
| parent | 5d688cb2777e72256ea373355e707b95ab08ac80 (diff) | |
| download | gcc-9505acd8501e6c79bc4fa9ed9f1ee174462601d1.zip gcc-9505acd8501e6c79bc4fa9ed9f1ee174462601d1.tar.gz gcc-9505acd8501e6c79bc4fa9ed9f1ee174462601d1.tar.bz2 | |
re PR tree-optimization/91180 (wrong code at -O and above with __builtin_memset())
2019-07-17 Richard Biener <rguenther@suse.de>
PR tree-optimization/91180
* tree-ssa-sccvn.c (vn_reference_lookup_3): Fix offset
computation for memset partial defs.
* gcc.dg/torture/pr91180.c: New testcase.
From-SVN: r273548
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/torture/pr91180.c | 13 | ||||
| -rw-r--r-- | gcc/tree-ssa-sccvn.c | 2 |
4 files changed, 25 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 0c1c133..877de19 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2019-07-17 Richard Biener <rguenther@suse.de> + + PR tree-optimization/91180 + * tree-ssa-sccvn.c (vn_reference_lookup_3): Fix offset + computation for memset partial defs. + 2019-07-17 Jakub Jelinek <jakub@redhat.com> * gimple.h (enum gf_mask): Remove GF_OMP_FOR_SIMD, change diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 5c156c7..f9ee482 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2019-07-17 Richard Biener <rguenther@suse.de> + + PR tree-optimization/91180 + * gcc.dg/torture/pr91180.c: New testcase. + 2019-07-17 Jakub Jelinek <jakub@redhat.com> PR tree-optimization/91157 diff --git a/gcc/testsuite/gcc.dg/torture/pr91180.c b/gcc/testsuite/gcc.dg/torture/pr91180.c new file mode 100644 index 0000000..02b2425 --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr91180.c @@ -0,0 +1,13 @@ +/* { dg-do run } */ + +int +main () +{ +#if __SIZEOF_INT__ == 4 + unsigned x = 0xffffffff; + __builtin_memset (1 + (char *) &x, 0, 2); + if (x != 0xff0000ff) + __builtin_abort (); +#endif + return 0; +} diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c index 73c77d1..830d37b 100644 --- a/gcc/tree-ssa-sccvn.c +++ b/gcc/tree-ssa-sccvn.c @@ -2486,7 +2486,7 @@ vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *data_, { pd_data pd; pd.rhs = build_constructor (NULL_TREE, NULL); - pd.offset = offset2i - offseti; + pd.offset = (offset2i - offseti) / BITS_PER_UNIT; pd.size = leni; return data->push_partial_def (pd, vuse, maxsizei); } |