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re PR tree-optimization/91896 (ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1687)

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2019-09-25  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/91896
	* tree-vect-loop.c (vectorizable_reduction): The single
	def-use cycle optimization cannot apply when there's more
	than one pattern stmt involved.

	* gcc.dg/torture/pr91896.c: New testcase.

From-SVN: r276158
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Richard Biener 2019-09-26 16:54:51 +00:00 committed by Richard Biener
parent 1b4dbccc1f
commit 0bfc204142
4 changed files with 31 additions and 6 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2019-09-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/91896
* tree-vect-loop.c (vectorizable_reduction): The single
def-use cycle optimization cannot apply when there's more
than one pattern stmt involved.
2019-09-26 Richard Biener <rguenther@suse.de>
* tree-vect-loop.c (vect_analyze_loop_operations): Analyze

13
gcc/expr.c
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@ -7230,12 +7230,13 @@ get_inner_reference (tree exp, poly_int64_pod *pbitsize,
*punsignedp = (! INTEGRAL_TYPE_P (TREE_TYPE (exp))
|| TYPE_UNSIGNED (TREE_TYPE (exp)));
/* For vector types, with the correct size of access, use the mode of
inner type. */
if (TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 0))) == VECTOR_TYPE
&& TREE_TYPE (exp) == TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 0)))
&& tree_int_cst_equal (size_tree, TYPE_SIZE (TREE_TYPE (exp))))
mode = TYPE_MODE (TREE_TYPE (exp));
/* For vector element types with the correct size of access or for
vector typed accesses use the mode of the access type. */
if ((TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 0))) == VECTOR_TYPE
&& TREE_TYPE (exp) == TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 0)))
&& tree_int_cst_equal (size_tree, TYPE_SIZE (TREE_TYPE (exp))))
|| VECTOR_TYPE_P (TREE_TYPE (exp)))
mode = TYPE_MODE (TREE_TYPE (exp));
}
else
{

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2019-09-26 Richard Biener <rguenther@suse.de>
PR middle-end/91897
* gcc.target/i386/pr91897.c: New testcase.
2019-09-26 Martin Sebor <msebor@redhat.com>
PR tree-optimization/91914

12
gcc/testsuite/gcc.target/i386/pr91897.c Normal file
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@ -0,0 +1,12 @@
/* { dg-do compile } */
/* { dg-options "-O2 -mavx" } */
typedef double Double16 __attribute__((vector_size(8*16)));
void mult(Double16 *res, const Double16 *v1, const Double16 *v2)
{
*res = *v1 * *v2;
}
/* We want 4 ymm loads and 4 ymm stores. */
/* { dg-final { scan-assembler-times "movapd" 8 } } */