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re PR target/65369 (nettle test failure on powerpc64le-linux-gnu when built with -O3) 

PR tree-optimization/65369
	* tree-vect-stmts.c (vectorizable_load) <case dr_explicit_realign>:
	Set bump to vs * TYPE_SIZE_UNIT (elem_type) - 1 instead of
	(vs - 1) * TYPE_SIZE_UNIT (elem_type).

	* gcc.c-torture/execute/pr65369.c: New test.

From-SVN: r221435
This commit is contained in:
Jakub Jelinek 2015-03-14 10:56:39 +01:00 committed by Jakub Jelinek
parent c2f41ffd24
commit d88981fc3e
4 changed files with 56 additions and 3 deletions
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5
gcc/ChangeLog
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@ -1,5 +1,10 @@
2015-03-14 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/65369
* tree-vect-stmts.c (vectorizable_load) <case dr_explicit_realign>:
Set bump to vs * TYPE_SIZE_UNIT (elem_type) - 1 instead of
(vs - 1) * TYPE_SIZE_UNIT (elem_type).
PR tree-optimization/65418
* tree-ssa-reassoc.c (extract_bit_test_mask): If there
are casts in the first PLUS_EXPR operand, ensure tbias and

3
gcc/testsuite/ChangeLog
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@ -1,5 +1,8 @@
2015-03-14 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/65369
* gcc.c-torture/execute/pr65369.c: New test.
PR tree-optimization/65418
* gcc.c-torture/execute/pr65418-1.c: New test.
* gcc.c-torture/execute/pr65418-2.c: New test.

45
gcc/testsuite/gcc.c-torture/execute/pr65369.c Normal file
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@ -0,0 +1,45 @@
/* PR tree-optimization/65369 */
static const char data[] =
"12345678901234567890123456789012345678901234567890"
"123456789012345678901234567890";
__attribute__ ((noinline))
static void foo (const unsigned int *buf)
{
if (__builtin_memcmp (buf, data, 64))
__builtin_abort ();
}
__attribute__ ((noinline))
static void bar (const unsigned char *block)
{
unsigned int buf[16];
__builtin_memcpy (buf + 0, block + 0, 4);
__builtin_memcpy (buf + 1, block + 4, 4);
__builtin_memcpy (buf + 2, block + 8, 4);
__builtin_memcpy (buf + 3, block + 12, 4);
__builtin_memcpy (buf + 4, block + 16, 4);
__builtin_memcpy (buf + 5, block + 20, 4);
__builtin_memcpy (buf + 6, block + 24, 4);
__builtin_memcpy (buf + 7, block + 28, 4);
__builtin_memcpy (buf + 8, block + 32, 4);
__builtin_memcpy (buf + 9, block + 36, 4);
__builtin_memcpy (buf + 10, block + 40, 4);
__builtin_memcpy (buf + 11, block + 44, 4);
__builtin_memcpy (buf + 12, block + 48, 4);
__builtin_memcpy (buf + 13, block + 52, 4);
__builtin_memcpy (buf + 14, block + 56, 4);
__builtin_memcpy (buf + 15, block + 60, 4);
foo (buf);
}
int
main ()
{
unsigned char input[sizeof data + 16] __attribute__((aligned (16)));
__builtin_memset (input, 0, sizeof input);
__builtin_memcpy (input + 1, data, sizeof data);
bar (input + 1);
return 0;
}

6
gcc/tree-vect-stmts.c
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@ -6468,9 +6468,8 @@ vectorizable_load (gimple stmt, gimple_stmt_iterator *gsi, gimple *vec_stmt,
case dr_explicit_realign:
{
tree ptr, bump;
tree vs_minus_1;
vs_minus_1 = size_int (TYPE_VECTOR_SUBPARTS (vectype) - 1);
tree vs = size_int (TYPE_VECTOR_SUBPARTS (vectype));
if (compute_in_loop)
msq = vect_setup_realignment (first_stmt, gsi,
@ -6499,8 +6498,9 @@ vectorizable_load (gimple stmt, gimple_stmt_iterator *gsi, gimple *vec_stmt,
vect_finish_stmt_generation (stmt, new_stmt, gsi);
msq = new_temp;
bump = size_binop (MULT_EXPR, vs_minus_1,
bump = size_binop (MULT_EXPR, vs,
TYPE_SIZE_UNIT (elem_type));
bump = size_binop (MINUS_EXPR, bump, size_one_node);
ptr = bump_vector_ptr (dataref_ptr, NULL, gsi, stmt, bump);
new_stmt = gimple_build_assign
(NULL_TREE, BIT_AND_EXPR, ptr,