Vectorization of bit-precision inductions isn't implemented but we
don't check this, instead we ICE during transform.
Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed.
PR tree-optimization/112505
* tree-vect-loop.cc (vectorizable_induction): Reject
bit-precision induction.
* gcc.dg/vect/pr112505.c: New testcase.
---
gcc/testsuite/gcc.dg/vect/pr112505.c | 14 ++++++++++++++
gcc/tree-vect-loop.cc | 9 +++++++++
2 files changed, 23 insertions(+)
create mode 100644 gcc/testsuite/gcc.dg/vect/pr112505.c
diff --git a/gcc/testsuite/gcc.dg/vect/pr112505.c
b/gcc/testsuite/gcc.dg/vect/pr112505.c
new file mode 100644
index 00000000000..56546c1095a
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/pr112505.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-O3" } */
+
+short int w9;
+struct T {
+ short a : 14;
+ int b;
+};
+struct T v;
+void zc()
+{
+ for(int i = 0; i < 4; i ++)
+ w9 *= v.b ? v.a-- < 0 : 0;
+}
diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index 1bdad0fbe0f..38bd8267ee1 100644
--- a/gcc/tree-vect-loop.cc
+++ b/gcc/tree-vect-loop.cc
@@ -10037,6 +10037,15 @@ vectorizable_induction (loop_vec_info loop_vinfo,
step_expr = STMT_VINFO_LOOP_PHI_EVOLUTION_PART (stmt_info);
gcc_assert (step_expr != NULL_TREE);
+ if (INTEGRAL_TYPE_P (TREE_TYPE (step_expr))
+ && !type_has_mode_precision_p (TREE_TYPE (step_expr)))
+ {
+ if (dump_enabled_p ())
+ dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
+ "bit-precision induction vectorization not "
+ "supported.\n");
+ return false;
+ }
tree step_vectype = get_same_sized_vectype (TREE_TYPE (step_expr), vectype);
/* Check for backend support of PLUS/MINUS_EXPR. */
--
2.35.3
