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[Vectorizer] Tidy up vect_create_epilog / use_scalar_result

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* tree-vect-loop.c (vect_create_epilog_for_reduction): Move code for
	'if (extract_scalar_result)' to the only place that it is true.

From-SVN: r217580
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Alan Lawrence 2014-11-14 17:20:40 +00:00 • committed by Alan Lawrence
parent b1bf6c522f
commit 18d11814af
2 changed files with 21 additions and 24 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2014-11-14 Alan Lawrence <alan.lawrence@arm.com>
* tree-vect-loop.c (vect_create_epilog_for_reduction): Move code for
'if (extract_scalar_result)' to the only place that it is true.
2014-11-14 H.J. Lu <hongjiu.lu@intel.com>
* config.gcc (default_gnu_indirect_function): Set to yes

40
gcc/tree-vect-loop.c
View file

@ -3914,7 +3914,6 @@ vect_create_epilog_for_reduction (vec<tree> vect_defs, gimple stmt,
tree orig_name, scalar_result;
imm_use_iterator imm_iter, phi_imm_iter;
use_operand_p use_p, phi_use_p;
bool extract_scalar_result = false;
gimple use_stmt, orig_stmt, reduction_phi = NULL;
bool nested_in_vect_loop = false;
auto_vec<gimple> new_phis;
@ -4281,6 +4280,8 @@ vect_create_epilog_for_reduction (vec<tree> vect_defs, gimple stmt,
Create: va = vop <va, va'>
} */
tree rhs;
if (dump_enabled_p ())
dump_printf_loc (MSG_NOTE, vect_location,
"Reduce using vector shifts\n");
@ -4307,7 +4308,20 @@ vect_create_epilog_for_reduction (vec<tree> vect_defs, gimple stmt,
gsi_insert_before (&exit_gsi, epilog_stmt, GSI_SAME_STMT);
}
extract_scalar_result = true;
/* 2.4 Extract the final scalar result. Create:
s_out3 = extract_field <v_out2, bitpos> */
if (dump_enabled_p ())
dump_printf_loc (MSG_NOTE, vect_location,
"extract scalar result\n");
rhs = build3 (BIT_FIELD_REF, scalar_type, new_temp,
bitsize, bitsize_zero_node);
epilog_stmt = gimple_build_assign (new_scalar_dest, rhs);
new_temp = make_ssa_name (new_scalar_dest, epilog_stmt);
gimple_assign_set_lhs (epilog_stmt, new_temp);
gsi_insert_before (&exit_gsi, epilog_stmt, GSI_SAME_STMT);
scalar_results.safe_push (new_temp);
}
else
{
@ -4401,30 +4415,8 @@ vect_create_epilog_for_reduction (vec<tree> vect_defs, gimple stmt,
else
/* Not SLP - we have one scalar to keep in SCALAR_RESULTS. */
scalar_results.safe_push (new_temp);
extract_scalar_result = false;
}
}
/* 2.4 Extract the final scalar result. Create:
s_out3 = extract_field <v_out2, bitpos> */
if (extract_scalar_result)
{
tree rhs;
if (dump_enabled_p ())
dump_printf_loc (MSG_NOTE, vect_location,
"extract scalar result\n");
rhs = build3 (BIT_FIELD_REF, scalar_type,
new_temp, bitsize, bitsize_zero_node);
epilog_stmt = gimple_build_assign (new_scalar_dest, rhs);
new_temp = make_ssa_name (new_scalar_dest, epilog_stmt);
gimple_assign_set_lhs (epilog_stmt, new_temp);
gsi_insert_before (&exit_gsi, epilog_stmt, GSI_SAME_STMT);
scalar_results.safe_push (new_temp);
}
vect_finalize_reduction: