82 lines
2.8 KiB
Diff
82 lines
2.8 KiB
Diff
2015-03-13 Jakub Jelinek <jakub@redhat.com>
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PR tree-optimization/65369
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* tree-vect-stmts.c (vectorizable_load) <case dr_explicit_realign>:
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Set bump to vs * TYPE_SIZE_UNIT (elem_type) - 1 instead of
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(vs - 1) * TYPE_SIZE_UNIT (elem_type).
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* gcc.c-torture/execute/pr65369.c: New test.
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--- gcc/tree-vect-stmts.c.jj 2015-03-09 08:05:13.000000000 +0100
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+++ gcc/tree-vect-stmts.c 2015-03-13 17:27:30.613529768 +0100
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@@ -6468,9 +6468,8 @@ vectorizable_load (gimple stmt, gimple_s
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case dr_explicit_realign:
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{
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tree ptr, bump;
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- tree vs_minus_1;
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- vs_minus_1 = size_int (TYPE_VECTOR_SUBPARTS (vectype) - 1);
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+ tree vs = size_int (TYPE_VECTOR_SUBPARTS (vectype));
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if (compute_in_loop)
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msq = vect_setup_realignment (first_stmt, gsi,
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@@ -6499,8 +6498,9 @@ vectorizable_load (gimple stmt, gimple_s
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vect_finish_stmt_generation (stmt, new_stmt, gsi);
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msq = new_temp;
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- bump = size_binop (MULT_EXPR, vs_minus_1,
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+ bump = size_binop (MULT_EXPR, vs,
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TYPE_SIZE_UNIT (elem_type));
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+ bump = size_binop (MINUS_EXPR, bump, size_one_node);
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ptr = bump_vector_ptr (dataref_ptr, NULL, gsi, stmt, bump);
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new_stmt = gimple_build_assign
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(NULL_TREE, BIT_AND_EXPR, ptr,
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--- gcc/testsuite/gcc.c-torture/execute/pr65369.c.jj 2015-03-13 17:37:10.926175685 +0100
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+++ gcc/testsuite/gcc.c-torture/execute/pr65369.c 2015-03-13 17:35:40.000000000 +0100
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@@ -0,0 +1,45 @@
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+/* PR tree-optimization/65369 */
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+
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+static const char data[] =
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+ "12345678901234567890123456789012345678901234567890"
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+ "123456789012345678901234567890";
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+
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+__attribute__ ((noinline))
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+static void foo (const unsigned int *buf)
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+{
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+ if (__builtin_memcmp (buf, data, 64))
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+ __builtin_abort ();
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+}
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+
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+__attribute__ ((noinline))
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+static void bar (const unsigned char *block)
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+{
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+ unsigned int buf[16];
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+ __builtin_memcpy (buf + 0, block + 0, 4);
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+ __builtin_memcpy (buf + 1, block + 4, 4);
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+ __builtin_memcpy (buf + 2, block + 8, 4);
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+ __builtin_memcpy (buf + 3, block + 12, 4);
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+ __builtin_memcpy (buf + 4, block + 16, 4);
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+ __builtin_memcpy (buf + 5, block + 20, 4);
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+ __builtin_memcpy (buf + 6, block + 24, 4);
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+ __builtin_memcpy (buf + 7, block + 28, 4);
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+ __builtin_memcpy (buf + 8, block + 32, 4);
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+ __builtin_memcpy (buf + 9, block + 36, 4);
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+ __builtin_memcpy (buf + 10, block + 40, 4);
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+ __builtin_memcpy (buf + 11, block + 44, 4);
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+ __builtin_memcpy (buf + 12, block + 48, 4);
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+ __builtin_memcpy (buf + 13, block + 52, 4);
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+ __builtin_memcpy (buf + 14, block + 56, 4);
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+ __builtin_memcpy (buf + 15, block + 60, 4);
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+ foo (buf);
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+}
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+
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+int
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+main ()
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+{
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+ unsigned char input[sizeof data + 16] __attribute__((aligned (16)));
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+ __builtin_memset (input, 0, sizeof input);
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+ __builtin_memcpy (input + 1, data, sizeof data);
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+ bar (input + 1);
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+ return 0;
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+}
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