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-rw-r--r--gcc/ChangeLog12
-rw-r--r--gcc/testsuite/ChangeLog4
-rw-r--r--gcc/testsuite/gcc.dg/vect/vect-alias-check-1.c17
-rw-r--r--gcc/tree-vect-data-refs.c63
-rw-r--r--gcc/tree-vect-loop-manip.c15
-rw-r--r--gcc/tree-vectorizer.h10
6 files changed, 81 insertions, 40 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f6ca6f6..d0699e2 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,15 @@
+2016-06-17 Bin Cheng <bin.cheng@arm.com>
+
+ * tree-vectorizer.h (struct dr_with_seg_len): Remove class
+ member OFFSET.
+ * tree-vect-data-refs.c (operator ==): Handle DR_OFFSET directly,
+ rather than OFFSET.
+ (comp_dr_with_seg_len_pair): Ditto.
+ (vect_prune_runtime_alias_test_list): Ditto. Also Canonicalize
+ struct dr_with_seg_len_pair against DR_OFFSET.
+ * tree-vect-loop-manip.c (vect_create_cond_for_alias_checks): Handle
+ DR_OFFSET directly.
+
2016-06-17 Szabolcs Nagy <szabolcs.nagy@arm.com>
* config/aarch64/geniterators.sh: Handle parenthesised conditions.
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index b62a0f9..936e17a 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2016-06-17 Bin Cheng <bin.cheng@arm.com>
+
+ * gcc.dg/vect/vect-alias-check-1.c: New test.
+
2016-06-16 Senthil Kumar Selvaraj <senthil_kumar.selvaraj@atmel.com>
* gcc.target/avr/pr71151-1.c: New test.
diff --git a/gcc/testsuite/gcc.dg/vect/vect-alias-check-1.c b/gcc/testsuite/gcc.dg/vect/vect-alias-check-1.c
new file mode 100644
index 0000000..c2b1c77
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/vect-alias-check-1.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target vect_int } */
+/* { dg-additional-options "-Ofast" } */
+
+int b, c = 1;
+int a[6][5] = { {0, 0, 0, 0, 0}, {0, 0, 0, 0, 0}, {0, 1, 0, 0, 0} };
+
+void
+fn1 ()
+{
+ int d;
+ for (b = 0; b < 5; b++)
+ for (d = 4; d; d--)
+ a[c + 1][b] = a[d + 1][d];
+}
+
+/* { dg-final { scan-tree-dump "improved number of alias checks from \[0-9\]* to 1" "vect" } } */
diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c
index 0ab8e6b..5ac34be 100644
--- a/gcc/tree-vect-data-refs.c
+++ b/gcc/tree-vect-data-refs.c
@@ -2851,7 +2851,8 @@ operator == (const dr_with_seg_len& d1,
{
return operand_equal_p (DR_BASE_ADDRESS (d1.dr),
DR_BASE_ADDRESS (d2.dr), 0)
- && compare_tree (d1.offset, d2.offset) == 0
+ && compare_tree (DR_OFFSET (d1.dr), DR_OFFSET (d2.dr)) == 0
+ && compare_tree (DR_INIT (d1.dr), DR_INIT (d2.dr)) == 0
&& compare_tree (d1.seg_len, d2.seg_len) == 0;
}
@@ -2861,15 +2862,12 @@ operator == (const dr_with_seg_len& d1,
so that we can combine aliasing checks in one scan. */
static int
-comp_dr_with_seg_len_pair (const void *p1_, const void *p2_)
+comp_dr_with_seg_len_pair (const void *pa_, const void *pb_)
{
- const dr_with_seg_len_pair_t* p1 = (const dr_with_seg_len_pair_t *) p1_;
- const dr_with_seg_len_pair_t* p2 = (const dr_with_seg_len_pair_t *) p2_;
-
- const dr_with_seg_len &p11 = p1->first,
- &p12 = p1->second,
- &p21 = p2->first,
- &p22 = p2->second;
+ const dr_with_seg_len_pair_t* pa = (const dr_with_seg_len_pair_t *) pa_;
+ const dr_with_seg_len_pair_t* pb = (const dr_with_seg_len_pair_t *) pb_;
+ const dr_with_seg_len &a1 = pa->first, &a2 = pa->second;
+ const dr_with_seg_len &b1 = pb->first, &b2 = pb->second;
/* For DR pairs (a, b) and (c, d), we only consider to merge the alias checks
if a and c have the same basic address snd step, and b and d have the same
@@ -2877,19 +2875,23 @@ comp_dr_with_seg_len_pair (const void *p1_, const void *p2_)
and step, we don't care the order of those two pairs after sorting. */
int comp_res;
- if ((comp_res = compare_tree (DR_BASE_ADDRESS (p11.dr),
- DR_BASE_ADDRESS (p21.dr))) != 0)
+ if ((comp_res = compare_tree (DR_BASE_ADDRESS (a1.dr),
+ DR_BASE_ADDRESS (b1.dr))) != 0)
+ return comp_res;
+ if ((comp_res = compare_tree (DR_BASE_ADDRESS (a2.dr),
+ DR_BASE_ADDRESS (b2.dr))) != 0)
return comp_res;
- if ((comp_res = compare_tree (DR_BASE_ADDRESS (p12.dr),
- DR_BASE_ADDRESS (p22.dr))) != 0)
+ if ((comp_res = compare_tree (DR_STEP (a1.dr), DR_STEP (b1.dr))) != 0)
return comp_res;
- if ((comp_res = compare_tree (DR_STEP (p11.dr), DR_STEP (p21.dr))) != 0)
+ if ((comp_res = compare_tree (DR_STEP (a2.dr), DR_STEP (b2.dr))) != 0)
return comp_res;
- if ((comp_res = compare_tree (DR_STEP (p12.dr), DR_STEP (p22.dr))) != 0)
+ if ((comp_res = compare_tree (DR_OFFSET (a1.dr), DR_OFFSET (b1.dr))) != 0)
return comp_res;
- if ((comp_res = compare_tree (p11.offset, p21.offset)) != 0)
+ if ((comp_res = compare_tree (DR_INIT (a1.dr), DR_INIT (b1.dr))) != 0)
return comp_res;
- if ((comp_res = compare_tree (p12.offset, p22.offset)) != 0)
+ if ((comp_res = compare_tree (DR_OFFSET (a2.dr), DR_OFFSET (b2.dr))) != 0)
+ return comp_res;
+ if ((comp_res = compare_tree (DR_INIT (a2.dr), DR_INIT (b2.dr))) != 0)
return comp_res;
return 0;
@@ -2992,6 +2994,7 @@ vect_prune_runtime_alias_test_list (loop_vec_info loop_vinfo)
/* First, we collect all data ref pairs for aliasing checks. */
FOR_EACH_VEC_ELT (may_alias_ddrs, i, ddr)
{
+ int comp_res;
struct data_reference *dr_a, *dr_b;
gimple *dr_group_first_a, *dr_group_first_b;
tree segment_length_a, segment_length_b;
@@ -3026,7 +3029,11 @@ vect_prune_runtime_alias_test_list (loop_vec_info loop_vinfo)
(dr_with_seg_len (dr_a, segment_length_a),
dr_with_seg_len (dr_b, segment_length_b));
- if (compare_tree (DR_BASE_ADDRESS (dr_a), DR_BASE_ADDRESS (dr_b)) > 0)
+ /* Canonicalize pairs by sorting the two DR members. */
+ comp_res = compare_tree (DR_BASE_ADDRESS (dr_a), DR_BASE_ADDRESS (dr_b));
+ if (comp_res > 0
+ || (comp_res == 0
+ && compare_tree (DR_OFFSET (dr_a), DR_OFFSET (dr_b)) > 0))
std::swap (dr_with_seg_len_pair.first, dr_with_seg_len_pair.second);
comp_alias_ddrs.safe_push (dr_with_seg_len_pair);
@@ -3082,21 +3089,21 @@ vect_prune_runtime_alias_test_list (loop_vec_info loop_vinfo)
}
if (!operand_equal_p (DR_BASE_ADDRESS (dr_a1->dr),
- DR_BASE_ADDRESS (dr_a2->dr),
- 0)
- || !tree_fits_shwi_p (dr_a1->offset)
- || !tree_fits_shwi_p (dr_a2->offset))
+ DR_BASE_ADDRESS (dr_a2->dr), 0)
+ || !operand_equal_p (DR_OFFSET (dr_a1->dr),
+ DR_OFFSET (dr_a2->dr), 0)
+ || !tree_fits_shwi_p (DR_INIT (dr_a1->dr))
+ || !tree_fits_shwi_p (DR_INIT (dr_a2->dr)))
continue;
/* Make sure dr_a1 starts left of dr_a2. */
- if (tree_int_cst_lt (dr_a2->offset, dr_a1->offset))
+ if (tree_int_cst_lt (DR_INIT (dr_a2->dr), DR_INIT (dr_a1->dr)))
std::swap (*dr_a1, *dr_a2);
- unsigned HOST_WIDE_INT diff
- = tree_to_shwi (dr_a2->offset) - tree_to_shwi (dr_a1->offset);
-
-
bool do_remove = false;
+ unsigned HOST_WIDE_INT diff
+ = (tree_to_shwi (DR_INIT (dr_a2->dr))
+ - tree_to_shwi (DR_INIT (dr_a1->dr)));
/* If the left segment does not extend beyond the start of the
right segment the new segment length is that of the right
@@ -3124,7 +3131,7 @@ vect_prune_runtime_alias_test_list (loop_vec_info loop_vinfo)
DIFF - SEGMENT_LENGTH_A < SEGMENT_LENGTH_B
- where DIFF = DR_A2->OFFSET - DR_A1->OFFSET. However,
+ where DIFF = DR_A2_INIT - DR_A1_INIT. However,
SEGMENT_LENGTH_A or SEGMENT_LENGTH_B may not be constant so we
have to make a best estimation. We can get the minimum value
of SEGMENT_LENGTH_B as a constant, represented by MIN_SEG_LEN_B,
diff --git a/gcc/tree-vect-loop-manip.c b/gcc/tree-vect-loop-manip.c
index 508bbf0..93b29b7 100644
--- a/gcc/tree-vect-loop-manip.c
+++ b/gcc/tree-vect-loop-manip.c
@@ -2238,11 +2238,16 @@ vect_create_cond_for_alias_checks (loop_vec_info loop_vinfo, tree * cond_expr)
const dr_with_seg_len& dr_b = comp_alias_ddrs[i].second;
tree segment_length_a = dr_a.seg_len;
tree segment_length_b = dr_b.seg_len;
-
- tree addr_base_a
- = fold_build_pointer_plus (DR_BASE_ADDRESS (dr_a.dr), dr_a.offset);
- tree addr_base_b
- = fold_build_pointer_plus (DR_BASE_ADDRESS (dr_b.dr), dr_b.offset);
+ tree addr_base_a = DR_BASE_ADDRESS (dr_a.dr);
+ tree addr_base_b = DR_BASE_ADDRESS (dr_b.dr);
+ tree offset_a = DR_OFFSET (dr_a.dr), offset_b = DR_OFFSET (dr_b.dr);
+
+ offset_a = fold_build2 (PLUS_EXPR, TREE_TYPE (offset_a),
+ offset_a, DR_INIT (dr_a.dr));
+ offset_b = fold_build2 (PLUS_EXPR, TREE_TYPE (offset_b),
+ offset_b, DR_INIT (dr_b.dr));
+ addr_base_a = fold_build_pointer_plus (addr_base_a, offset_a);
+ addr_base_b = fold_build_pointer_plus (addr_base_b, offset_b);
if (dump_enabled_p ())
{
diff --git a/gcc/tree-vectorizer.h b/gcc/tree-vectorizer.h
index 6d52b55..f15672f 100644
--- a/gcc/tree-vectorizer.h
+++ b/gcc/tree-vectorizer.h
@@ -146,19 +146,15 @@ typedef struct _slp_instance {
/* This struct is used to store the information of a data reference,
- including the data ref itself, the access offset (calculated by summing its
- offset and init) and the segment length for aliasing checks.
- This is used to merge alias checks. */
+ including the data ref itself and the segment length for aliasing
+ checks. This is used to merge alias checks. */
struct dr_with_seg_len
{
dr_with_seg_len (data_reference_p d, tree len)
- : dr (d),
- offset (size_binop (PLUS_EXPR, DR_OFFSET (d), DR_INIT (d))),
- seg_len (len) {}
+ : dr (d), seg_len (len) {}
data_reference_p dr;
- tree offset;
tree seg_len;
};
generated by cgit v1.1 at 2025-08-10 22:20:25 +0000