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tree-optimization/97709 - set abnormal flag when vectorizing live lanes

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This properly sets the abnormal flag when vectorizing live lanes
when the original scalar was live across an abnormal edge.

2020-11-04  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/97709
	* tree-vect-loop.c (vectorizable_live_operation): Set
	SSA_NAME_OCCURS_IN_ABNORMAL_PHI when necessary.

	* gcc.dg/vect/bb-slp-pr97709.c: New testcase.
This commit is contained in:
Richard Biener 2020-11-04 11:20:17 +01:00
parent 3e190757fa
commit 1e9f339d94
2 changed files with 29 additions and 0 deletions
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26
gcc/testsuite/gcc.dg/vect/bb-slp-pr97709.c Normal file
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@ -0,0 +1,26 @@
/* { dg-do compile } */
int a;
struct b {
int c;
int d;
};
void k (struct b);
struct b
e()
{
void *f[] = {&&g, &&h, &&i, &&j};
int d, c;
j:
goto *a;
g:
d = 0;
h:
c = 1;
goto *a;
i:
{
struct b b = {c, d};
k(b);
}
}

3
gcc/tree-vect-loop.c
View File

@ -8568,6 +8568,9 @@ vectorizable_live_operation (vec_info *vinfo,
gimple_seq stmts = NULL;
new_tree = force_gimple_operand (fold_convert (lhs_type, new_tree),
&stmts, true, NULL_TREE);
if (TREE_CODE (new_tree) == SSA_NAME
&& SSA_NAME_OCCURS_IN_ABNORMAL_PHI (lhs))
SSA_NAME_OCCURS_IN_ABNORMAL_PHI (new_tree) = 1;
if (is_a <gphi *> (vec_stmt))
{
gimple_stmt_iterator si = gsi_after_labels (gimple_bb (vec_stmt));