https://gcc.gnu.org/g:d53f555edb95248dbf81347ba5e4136e9a491eca
commit r15-963-gd53f555edb95248dbf81347ba5e4136e9a491eca
Author: Feng Xue <f...@os.amperecomputing.com>
Date: Wed May 29 16:41:57 2024 +0800
vect: Bind input vectype to lane-reducing operation
The input vectype is an attribute of lane-reducing operation, instead of
reduction PHI that it is associated to, since there might be more than one
lane-reducing operations with different type in a loop reduction chain. So
bind each lane-reducing operation with its own input type.
2024-05-29 Feng Xue <f...@os.amperecomputing.com>
gcc/
* tree-vect-loop.cc (vect_is_emulated_mixed_dot_prod): Remove
parameter
loop_vinfo. Get input vectype from stmt_info instead of reduction
PHI.
(vect_model_reduction_cost): Remove loop_vinfo argument of call to
vect_is_emulated_mixed_dot_prod.
(vect_transform_reduction): Likewise.
(vectorizable_reduction): Likewise, and bind input vectype to
lane-reducing operation.
Diff:
---
gcc/tree-vect-loop.cc | 23 +++++++++++++----------
1 file changed, 13 insertions(+), 10 deletions(-)
diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index 7a6a6b6161d..5b85cffb37f 100644
--- a/gcc/tree-vect-loop.cc
+++ b/gcc/tree-vect-loop.cc
@@ -5270,8 +5270,7 @@ have_whole_vector_shift (machine_mode mode)
See vect_emulate_mixed_dot_prod for the actual sequence used. */
static bool
-vect_is_emulated_mixed_dot_prod (loop_vec_info loop_vinfo,
- stmt_vec_info stmt_info)
+vect_is_emulated_mixed_dot_prod (stmt_vec_info stmt_info)
{
gassign *assign = dyn_cast<gassign *> (stmt_info->stmt);
if (!assign || gimple_assign_rhs_code (assign) != DOT_PROD_EXPR)
@@ -5282,10 +5281,9 @@ vect_is_emulated_mixed_dot_prod (loop_vec_info
loop_vinfo,
if (TYPE_SIGN (TREE_TYPE (rhs1)) == TYPE_SIGN (TREE_TYPE (rhs2)))
return false;
- stmt_vec_info reduc_info = info_for_reduction (loop_vinfo, stmt_info);
- gcc_assert (reduc_info->is_reduc_info);
+ gcc_assert (STMT_VINFO_REDUC_VECTYPE_IN (stmt_info));
return !directly_supported_p (DOT_PROD_EXPR,
- STMT_VINFO_REDUC_VECTYPE_IN (reduc_info),
+ STMT_VINFO_REDUC_VECTYPE_IN (stmt_info),
optab_vector_mixed_sign);
}
@@ -5324,8 +5322,8 @@ vect_model_reduction_cost (loop_vec_info loop_vinfo,
if (!gimple_extract_op (orig_stmt_info->stmt, &op))
gcc_unreachable ();
- bool emulated_mixed_dot_prod
- = vect_is_emulated_mixed_dot_prod (loop_vinfo, stmt_info);
+ bool emulated_mixed_dot_prod = vect_is_emulated_mixed_dot_prod (stmt_info);
+
if (reduction_type == EXTRACT_LAST_REDUCTION)
/* No extra instructions are needed in the prologue. The loop body
operations are costed in vectorizable_condition. */
@@ -7837,6 +7835,11 @@ vectorizable_reduction (loop_vec_info loop_vinfo,
vectype_in = STMT_VINFO_VECTYPE (phi_info);
STMT_VINFO_REDUC_VECTYPE_IN (reduc_info) = vectype_in;
+ /* Each lane-reducing operation has its own input vectype, while reduction
+ PHI records the input vectype with least lanes. */
+ if (lane_reducing)
+ STMT_VINFO_REDUC_VECTYPE_IN (stmt_info) = vectype_in;
+
enum vect_reduction_type v_reduc_type = STMT_VINFO_REDUC_TYPE (phi_info);
STMT_VINFO_REDUC_TYPE (reduc_info) = v_reduc_type;
/* If we have a condition reduction, see if we can simplify it further. */
@@ -8363,7 +8366,7 @@ vectorizable_reduction (loop_vec_info loop_vinfo,
if (single_defuse_cycle || lane_reducing)
{
int factor = 1;
- if (vect_is_emulated_mixed_dot_prod (loop_vinfo, stmt_info))
+ if (vect_is_emulated_mixed_dot_prod (stmt_info))
/* Three dot-products and a subtraction. */
factor = 4;
record_stmt_cost (cost_vec, ncopies * factor, vector_stmt,
@@ -8615,8 +8618,8 @@ vect_transform_reduction (loop_vec_info loop_vinfo,
: &vec_oprnds2));
}
- bool emulated_mixed_dot_prod
- = vect_is_emulated_mixed_dot_prod (loop_vinfo, stmt_info);
+ bool emulated_mixed_dot_prod = vect_is_emulated_mixed_dot_prod (stmt_info);
+
FOR_EACH_VEC_ELT (vec_oprnds0, i, def0)
{
gimple *new_stmt;
