The following refactors the check for emulated vector support for
the cases of plus, minus and negate. In the PR we end up with
a SImode plus, supported by the target but emulated and in this
context fail to verify we are dealing with exactly word_mode.
Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed.
PR tree-optimization/109672
* tree-vect-stmts.cc (vectorizable_operation): For plus,
minus and negate always check the vector mode is word mode.
---
gcc/tree-vect-stmts.cc | 21 +++++++++------------
1 file changed, 9 insertions(+), 12 deletions(-)
diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index c71e28737ee..3ad6a7d28d7 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -6384,29 +6384,26 @@ vectorizable_operation (vec_info *vinfo,
}
bool using_emulated_vectors_p = vect_emulated_vector_p (vectype);
- if (!target_support_p)
+ if (!target_support_p || using_emulated_vectors_p)
{
if (dump_enabled_p ())
dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
- "op not supported by target.\n");
+ "op not supported by target.\n");
/* Check only during analysis. */
- if (maybe_ne (GET_MODE_SIZE (vec_mode), UNITS_PER_WORD)
+ if (((code == PLUS_EXPR || code == MINUS_EXPR || code == NEGATE_EXPR)
+ && maybe_ne (GET_MODE_SIZE (vec_mode), UNITS_PER_WORD))
|| (!vec_stmt && !vect_can_vectorize_without_simd_p (code)))
- return false;
+ {
+ if (dump_enabled_p ())
+ dump_printf (MSG_NOTE, "using word mode not possible.\n");
+ return false;
+ }
if (dump_enabled_p ())
dump_printf_loc (MSG_NOTE, vect_location,
"proceeding using word mode.\n");
using_emulated_vectors_p = true;
}
- if (using_emulated_vectors_p
- && !vect_can_vectorize_without_simd_p (code))
- {
- if (dump_enabled_p ())
- dump_printf (MSG_NOTE, "using word mode not possible.\n");
- return false;
- }
-
int reduc_idx = STMT_VINFO_REDUC_IDX (stmt_info);
vec_loop_masks *masks = (loop_vinfo ? &LOOP_VINFO_MASKS (loop_vinfo) : NULL);
internal_fn cond_fn = get_conditional_internal_fn (code);
--
2.35.3
