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re PR tree-optimization/77621 (Internal compiler error for mtune=atom + msse2)

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2016-09-21  Richard Biener  <rguenther@suse.de>
	Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/77621
	* tree-vect-data-refs.c (vect_analyze_data_ref_accesses): Split
	group at non-vectorizable stmts.

	* gcc.dg/pr77621.c: New testcase.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>

From-SVN: r240302
This commit is contained in:
Richard Biener 2016-09-21 07:37:18 +00:00 • committed by Richard Biener
parent 096506bb6e
commit f955c4c483
4 changed files with 31 additions and 0 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2016-09-21 Richard Biener <rguenther@suse.de>
Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/77621
* tree-vect-data-refs.c (vect_analyze_data_ref_accesses): Split
group at non-vectorizable stmts.
2016-09-21 Kugan Vivekanandarajah <kuganv@linaro.org>
PR tree-optimization/72835

6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2016-09-21 Richard Biener <rguenther@suse.de>
Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/77621
* gcc.dg/pr77621.c: New testcase.
2016-09-21 Paul Thomas <pault@gcc.gnu.org>
PR fortran/77657

11
gcc/testsuite/gcc.dg/pr77621.c Normal file
View file

@ -0,0 +1,11 @@
/* { dg-do compile } */
/* { dg-options "-O3" } */
/* { dg-additional-options "-mtune=atom -msse2" { target i?86-*-* x86_64-*-* } } */
void
foo (double *x, int *y)
{
int i;
for (i = 0; i < 8; i++)
x[i] -= y[i] * x[i + 1];
}

7
gcc/tree-vect-data-refs.c
View file

@ -2711,10 +2711,17 @@ vect_analyze_data_ref_accesses (vec_info *vinfo)
data_reference_p dra = datarefs_copy[i];
stmt_vec_info stmtinfo_a = vinfo_for_stmt (DR_STMT (dra));
stmt_vec_info lastinfo = NULL;
if (! STMT_VINFO_VECTORIZABLE (stmtinfo_a))
{
++i;
continue;
}
for (i = i + 1; i < datarefs_copy.length (); ++i)
{
data_reference_p drb = datarefs_copy[i];
stmt_vec_info stmtinfo_b = vinfo_for_stmt (DR_STMT (drb));
if (! STMT_VINFO_VECTORIZABLE (stmtinfo_b))
break;
/* ??? Imperfect sorting (non-compatible types, non-modulo
accesses, same accesses) can lead to a group to be artificially