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| author | Richard Biener <rguenther@suse.de> | 2016-01-13 08:26:45 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2016-01-13 08:26:45 +0000 |
| commit | ccbd710399f78a99fa8fafd1d6dac02985d95666 (patch) | |
| tree | 6b91c6c5c7499c7b62453f98705d10c3e3dcf5b9 /gcc | |
| parent | c6f72a46146142e8d9689e160a7d7d9d9bd227de (diff) | |
| download | gcc-ccbd710399f78a99fa8fafd1d6dac02985d95666.zip gcc-ccbd710399f78a99fa8fafd1d6dac02985d95666.tar.gz gcc-ccbd710399f78a99fa8fafd1d6dac02985d95666.tar.bz2 | |
re PR tree-optimization/69186 (ICE at -O3 on x86_64-linux-gnu in vect_update_misalignment_for_peel, at tree-vect-data-refs.c:889)
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.
* gcc.dg/torture/pr69186.c: New testcase.
From-SVN: r232314
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/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) |