Hi!
WHen tree_if_conversion is called from within the vectorizer (for masked
epilogues), preds is NULL, so we shouldn't be pushing anything there,
the caller doesn't care anyway.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
2019-02-09 Jakub Jelinek <ja...@redhat.com>
PR tree-optimization/89268
* tree-if-conv.c (version_loop_for_if_conversion): Push to preds only
if preds is non-NULL.
* gcc.dg/vect/pr89268.c: New test.
--- gcc/tree-if-conv.c.jj 2019-02-08 20:00:40.774827920 +0100
+++ gcc/tree-if-conv.c 2019-02-09 17:35:36.995782510 +0100
@@ -2760,7 +2760,8 @@ version_loop_for_if_conversion (struct l
new_loop->force_vectorize = false;
gsi = gsi_last_bb (cond_bb);
gimple_call_set_arg (g, 1, build_int_cst (integer_type_node, new_loop->num));
- preds->safe_push (g);
+ if (preds)
+ preds->safe_push (g);
gsi_insert_before (&gsi, g, GSI_SAME_STMT);
update_ssa (TODO_update_ssa);
return new_loop;
--- gcc/testsuite/gcc.dg/vect/pr89268.c.jj 2019-02-09 17:53:15.099481437
+0100
+++ gcc/testsuite/gcc.dg/vect/pr89268.c 2019-02-09 17:53:50.900896069 +0100
@@ -0,0 +1,7 @@
+/* PR tree-optimization/89268 */
+/* { dg-do compile } */
+/* { dg-require-effective-target vect_condition } */
+/* { dg-additional-options "-fno-trapping-math --param
vect-epilogues-nomask=1" } */
+/* { dg-additional-options "-mavx512ifma -mtune=intel" { target x86_64-*-*
i?86-*-* } } */
+
+#include "pr79887.c"
Jakub
