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re PR tree-optimization/90006 (gcc loops indefinitely around vect_get_constant_vectors on -O2 -ftree-slp-vectorize -fno-math-errno)

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2019-04-08  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/90006
	* tree-vect-data-refs.c (vect_get_smallest_scalar_type): Handle
	calls like lrint.

	* gcc.dg/vect/bb-slp-pr90006.c: New testcase.

From-SVN: r270210
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Richard Biener 2019-04-08 13:54:02 +00:00 • committed by Richard Biener
parent b8e214c6b3
commit a265c9a929
4 changed files with 51 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2019-04-08 Richard Biener <rguenther@suse.de>
PR tree-optimization/90006
* tree-vect-data-refs.c (vect_get_smallest_scalar_type): Handle
calls like lrint.
2019-04-08 Andrea Corallo <andrea.corallo@arm.com>
PR target/83033

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2019-04-08 Richard Biener <rguenther@suse.de>
PR tree-optimization/90006
* gcc.dg/vect/bb-slp-pr90006.c: New testcase.
2019-04-08 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/89865

31
gcc/testsuite/gcc.dg/vect/bb-slp-pr90006.c Normal file
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@ -0,0 +1,31 @@
/* { dg-do compile } */
/* { dg-additional-options "-fno-math-errno" } */
/* { dg-additional-options "-march=x86-64" { target x86_64-*-* i?86-*-* } } */
long int lrint(double x);
int a, b;
union c {
int d;
};
int e()
{
int f, g, h;
long i, j, k;
double l, m = b = lrint(0.3127);
a = b >> 16 >> 8 & 255;
((union c *)e)->d = a;
k = m;
h = k >> 16 >> 8 & 255;
((union c *)(e + 4))->d = h;
j = lrint(l);
g = j >> 16 >> 8 & 255;
((union c *)(e + 8))->d = g;
i = lrint(0.292);
f = i >> 16 >> 8 & 255;
((union c *)(e + 12))->d = f;
return 0;
}
/* { dg-final { scan-tree-dump "basic block vectorized" "slp2" { target { { x86_64-*-* i?86-*-* } && ilp32 } } } } */

9
gcc/tree-vect-data-refs.c
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@ -141,6 +141,15 @@ vect_get_smallest_scalar_type (stmt_vec_info stmt_info,
{
tree rhs_type = TREE_TYPE (gimple_assign_rhs1 (assign));
rhs = TREE_INT_CST_LOW (TYPE_SIZE_UNIT (rhs_type));
if (rhs < lhs)
scalar_type = rhs_type;
}
else if (is_gimple_call (stmt_info->stmt)
&& gimple_call_num_args (stmt_info->stmt) > 0)
{
tree rhs_type = TREE_TYPE (gimple_call_arg (stmt_info->stmt, 0));
rhs = TREE_INT_CST_LOW (TYPE_SIZE_UNIT (rhs_type));
if (rhs < lhs)
scalar_type = rhs_type;