From ccbd710399f78a99fa8fafd1d6dac02985d95666 Mon Sep 17 00:00:00 2001 From: Richard Biener Date: Wed, 13 Jan 2016 08:26:45 +0000 Subject: [PATCH] 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 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 --- gcc/ChangeLog | 6 ++++++ gcc/testsuite/ChangeLog | 5 +++++ gcc/testsuite/gcc.dg/torture/pr69186.c | 12 ++++++++++++ gcc/tree-vect-data-refs.c | 11 ++++++++++- 4 files changed, 33 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/gcc.dg/torture/pr69186.c diff --git a/gcc/ChangeLog b/gcc/ChangeLog index f8f818bfb5d..cb2ec45280a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2016-01-13 Richard Biener + + 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 PR tree-optimization/pr67755 diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 240fae713e4..0ce47d49ea7 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2016-01-13 Richard Biener + + PR tree-optimization/69186 + * gcc.dg/torture/pr69186.c: New testcase. + 2016-01-13 Jeff Law 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 00000000000..d897ff6410b --- /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 d0e20da04a6..3605fa4a7a4 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) -- 2.30.2