diff options
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/torture/pr69186.c | 12 | ||||
| -rw-r--r-- | gcc/tree-vect-data-refs.c | 11 |
4 files changed, 33 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index f8f818b..cb2ec45 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2016-01-13 Richard Biener <rguenther@suse.de> + + PR tree-optimization/69186 + * tree-vect-data-refs.c (vect_enhance_data_refs_alignment): + Properly guard vect_update_misalignment_for_peel call. + 2016-01-12 Jeff Law <law@redhat.com> PR tree-optimization/pr67755 diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 240fae7..0ce47d4 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2016-01-13 Richard Biener <rguenther@suse.de> + + PR tree-optimization/69186 + * gcc.dg/torture/pr69186.c: New testcase. + 2016-01-13 Jeff Law <law@redhat.com> PR tree-optimization/67755 diff --git a/gcc/testsuite/gcc.dg/torture/pr69186.c b/gcc/testsuite/gcc.dg/torture/pr69186.c new file mode 100644 index 0000000..d897ff6 --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr69186.c @@ -0,0 +1,12 @@ +/* { dg-do compile } */ + +static int a[10][2]; +int b; + +void +fn1 () +{ + b = 0; + for (; b < 6; b++) + a[b][2] ^= 1; +} diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c index d0e20da..3605fa4 100644 --- a/gcc/tree-vect-data-refs.c +++ b/gcc/tree-vect-data-refs.c @@ -1826,7 +1826,16 @@ vect_enhance_data_refs_alignment (loop_vec_info loop_vinfo) misalignment of DR_i must be set to unknown. */ FOR_EACH_VEC_ELT (datarefs, i, dr) if (dr != dr0) - vect_update_misalignment_for_peel (dr, dr0, npeel); + { + /* Strided accesses perform only component accesses, alignment + is irrelevant for them. */ + stmt_info = vinfo_for_stmt (DR_STMT (dr)); + if (STMT_VINFO_STRIDED_P (stmt_info) + && !STMT_VINFO_GROUPED_ACCESS (stmt_info)) + continue; + + vect_update_misalignment_for_peel (dr, dr0, npeel); + } LOOP_VINFO_UNALIGNED_DR (loop_vinfo) = dr0; if (npeel) |