In vectorizable_live_operation() we always assume uses a of live operation
will be PHIs. However, when using -g a use of a live operation might be a
DEBUG stmt.
This patch avoids adding any DEBUG statments to the worklist in
vectorizable_live_operation(). Also fixes comment.
Tested on x86 and aarch64.
Ok to commit?
gcc/
PR tree-optimization/71667
* tree-vect-loop.c (vectorizable_live_operation): ignore DEBUG stmts
testsuite/gcc.dg/vect
PR tree-optimization/71667
* pr71667.c: New
diff --git a/gcc/testsuite/gcc.dg/vect/pr71667.c
b/gcc/testsuite/gcc.dg/vect/pr71667.c
new file mode 100644
index
0000000000000000000000000000000000000000..e7012efa882a5497b0a6099c3d853f9eb
375cc53
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/pr71667.c
@@ -0,0 +1,30 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-g" } */
+
+unsigned int mu;
+int pt;
+
+void
+qf (void)
+{
+ int gy;
+ long int vz;
+
+ for (;;)
+ {
+ for (gy = 0; gy < 80; ++gy)
+ {
+ vz = mu;
+ ++mu;
+ pt = (vz != 0) && (pt != 0);
+ }
+ while (gy < 81)
+ while (gy < 83)
+ {
+ vz = (vz != 0) ? 0 : mu;
+ ++gy;
+ }
+ pt = vz;
+ ++mu;
+ }
+}
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
index
6c0337bbbcbebd6443fd3bcef45c1b23a7833486..2980a1b031cd3b919369b5e31dff7e066
5bc7578 100644
--- a/gcc/tree-vect-loop.c
+++ b/gcc/tree-vect-loop.c
@@ -6352,11 +6352,12 @@ vectorizable_live_operation (gimple *stmt,
: gimple_get_lhs (stmt);
lhs_type = TREE_TYPE (lhs);
- /* Find all uses of STMT outside the loop - there should be exactly
one. */
+ /* Find all uses of STMT outside the loop - there should be at least
one. */
auto_vec<gimple *, 4> worklist;
FOR_EACH_IMM_USE_STMT (use_stmt, imm_iter, lhs)
- if (!flow_bb_inside_loop_p (loop, gimple_bb (use_stmt)))
- worklist.safe_push (use_stmt);
+ if (!flow_bb_inside_loop_p (loop, gimple_bb (use_stmt))
+ && !is_gimple_debug (use_stmt))
+ worklist.safe_push (use_stmt);
gcc_assert (worklist.length () >= 1);
bitsize = TYPE_SIZE (TREE_TYPE (vectype));
