OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

tree-vect-slp.c (vect_analyze_slp): When reduction group SLP discovery fails try to handle the reduction as part of...

Browse Source 
2019-10-24  Richard Biener  <rguenther@suse.de>

	* tree-vect-slp.c (vect_analyze_slp): When reduction group
	SLP discovery fails try to handle the reduction as part
	of SLP reduction discovery.

	* gcc.dg/vect/slp-reduc-9.c: New testcase.

From-SVN: r277366
This commit is contained in:
Richard Biener 2019-10-24 06:19:01 +00:00 committed by Richard Biener
parent 5a7c450582
commit 0214d31a48
4 changed files with 39 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2019-10-24 Richard Biener <rguenther@suse.de>
* tree-vect-slp.c (vect_analyze_slp): When reduction group
SLP discovery fails try to handle the reduction as part
of SLP reduction discovery.
2019-10-23 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/rs6000-protos.h (rs6000_adjust_insn_length): New

4
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,7 @@
2019-10-24 Richard Biener <rguenther@suse.de>
* gcc.dg/vect/slp-reduc-9.c: New testcase.
2019-10-23 David Edelsohn <dje.gcc@gmail.com>
* gcc.target/powerpc/pr70010.c: Add -Wno-psabi.

25
gcc/testsuite/gcc.dg/vect/slp-reduc-9.c Normal file
View File

@ -0,0 +1,25 @@
/* { dg-do compile } */
/* { dg-require-effective-target vect_int_mult } */
int
bar (int *x, int a, int b, int n)
{
x = __builtin_assume_aligned (x, __BIGGEST_ALIGNMENT__);
int sum1 = 0;
int sum2 = 0;
for (int i = 0; i < n; ++i)
{
/* Reduction chain vectorization fails here because of the
different operations but we can still vectorize both
reductions as SLP reductions, saving IVs. */
sum1 += x[2*i] - a;
sum1 += x[2*i+1] * b;
sum2 += x[2*i] - b;
sum2 += x[2*i+1] * a;
}
return sum1 + sum2;
}
/* { dg-final { scan-tree-dump "Loop contains only SLP stmts" "vect" } } */
/* { dg-final { scan-tree-dump "vectorizing stmts using SLP" "vect" } } */
/* { dg-final { scan-tree-dump "vectorized 1 loops" "vect" } } */

4
gcc/tree-vect-slp.c
View File

@ -2271,14 +2271,18 @@ vect_analyze_slp (vec_info *vinfo, unsigned max_tree_size)
{
/* Dissolve reduction chain group. */
stmt_vec_info vinfo = first_element;
stmt_vec_info last = NULL;
while (vinfo)
{
stmt_vec_info next = REDUC_GROUP_NEXT_ELEMENT (vinfo);
REDUC_GROUP_FIRST_ELEMENT (vinfo) = NULL;
REDUC_GROUP_NEXT_ELEMENT (vinfo) = NULL;
last = vinfo;
vinfo = next;
}
STMT_VINFO_DEF_TYPE (first_element) = vect_internal_def;
/* It can be still vectorized as part of an SLP reduction. */
loop_vinfo->reductions.safe_push (last);
}
}