diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/testsuite/gcc.dg/vect/pr91403.c | 11 | ||||
| -rw-r--r-- | gcc/tree-vect-data-refs.c | 6 |
2 files changed, 16 insertions, 1 deletions
diff --git a/gcc/testsuite/gcc.dg/vect/pr91403.c b/gcc/testsuite/gcc.dg/vect/pr91403.c new file mode 100644 index 0000000..5b9b760 --- /dev/null +++ b/gcc/testsuite/gcc.dg/vect/pr91403.c @@ -0,0 +1,11 @@ +/* { dg-do compile } */ +/* { dg-additional-options "-O3" } */ + +extern int a[][1000000]; +int b; +void c() +{ + for (int d = 2; d <= 9; d++) + for (int e = 32; e <= 41; e++) + b += a[d][5]; +} diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c index c71ff73..97c8577 100644 --- a/gcc/tree-vect-data-refs.c +++ b/gcc/tree-vect-data-refs.c @@ -2538,7 +2538,11 @@ vect_analyze_group_access_1 (vec_info *vinfo, dr_vec_info *dr_info) size. */ if (DR_IS_READ (dr) && (dr_step % type_size) == 0 - && groupsize > 0) + && groupsize > 0 + /* This could be UINT_MAX but as we are generating code in a very + inefficient way we have to cap earlier. + See PR91403 for example. */ + && groupsize <= 4096) { DR_GROUP_FIRST_ELEMENT (stmt_info) = stmt_info; DR_GROUP_SIZE (stmt_info) = groupsize; |