diff options
Diffstat (limited to 'gcc-4.9/gcc/tree-data-ref.c')
| -rw-r--r-- | gcc-4.9/gcc/tree-data-ref.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/tree-data-ref.c b/gcc-4.9/gcc/tree-data-ref.c index 01d0a7a79..f279bf391 100644 --- a/gcc-4.9/gcc/tree-data-ref.c +++ b/gcc-4.9/gcc/tree-data-ref.c @@ -979,10 +979,13 @@ dr_analyze_indices (struct data_reference *dr, loop_p nest, loop_p loop) guaranteed. As a band-aid, mark the access so we can special-case it in dr_may_alias_p. */ + tree old = ref; ref = fold_build2_loc (EXPR_LOCATION (ref), MEM_REF, TREE_TYPE (ref), base, memoff); DR_UNCONSTRAINED_BASE (dr) = true; + MR_DEPENDENCE_CLIQUE (ref) = MR_DEPENDENCE_CLIQUE (old); + MR_DEPENDENCE_BASE (ref) = MR_DEPENDENCE_BASE (old); access_fns.safe_push (access_fn); } } @@ -1389,6 +1392,12 @@ dr_may_alias_p (const struct data_reference *a, const struct data_reference *b, return false; } + if ((TREE_CODE (addr_a) == MEM_REF || TREE_CODE (addr_a) == TARGET_MEM_REF) + && (TREE_CODE (addr_b) == MEM_REF || TREE_CODE (addr_b) == TARGET_MEM_REF) + && MR_DEPENDENCE_CLIQUE (addr_a) == MR_DEPENDENCE_CLIQUE (addr_b) + && MR_DEPENDENCE_BASE (addr_a) != MR_DEPENDENCE_BASE (addr_b)) + return false; + /* If we had an evolution in a MEM_REF BASE_OBJECT we do not know the size of the base-object. So we cannot do any offset/overlap based analysis but have to rely on points-to information only. */ |