#include "internal-fn.h"
#include "tree-vector-builder.h"
#include "vec-perm-indices.h"
+#include "gimple-range.h"
#include "tree-ssa-loop-niter.h"
#include "gimple-fold.h"
#include "regs.h"
/* Create vectorized demotion statements for vector operands from VEC_OPRNDS.
For multi-step conversions store the resulting vectors and call the function
- recursively. */
+ recursively. When NARROW_SRC_P is true, there's still a conversion after
+ narrowing, don't store the vectors in the SLP_NODE or in vector info of
+ the scalar statement(or in STMT_VINFO_RELATED_STMT chain). */
static void
vect_create_vectorized_demotion_stmts (vec_info *vinfo, vec<tree> *vec_oprnds,
stmt_vec_info stmt_info,
vec<tree> &vec_dsts,
gimple_stmt_iterator *gsi,
- slp_tree slp_node, enum tree_code code)
+ slp_tree slp_node, enum tree_code code,
+ bool narrow_src_p)
{
unsigned int i;
tree vop0, vop1, new_tmp, vec_dest;
new_tmp = make_ssa_name (vec_dest, new_stmt);
gimple_assign_set_lhs (new_stmt, new_tmp);
vect_finish_stmt_generation (vinfo, stmt_info, new_stmt, gsi);
-
- if (multi_step_cvt)
- /* Store the resulting vector for next recursive call. */
+ if (multi_step_cvt || narrow_src_p)
+ /* Store the resulting vector for next recursive call,
+ or return the resulting vector_tmp for NARROW FLOAT_EXPR. */
(*vec_oprnds)[i/2] = new_tmp;
else
{
vect_create_vectorized_demotion_stmts (vinfo, vec_oprnds,
multi_step_cvt - 1,
stmt_info, vec_dsts, gsi,
- slp_node, VEC_PACK_TRUNC_EXPR);
+ slp_node, VEC_PACK_TRUNC_EXPR,
+ narrow_src_p);
}
vec_dsts.quick_push (vec_dest);
tree vectype_out, vectype_in;
int ncopies, i;
tree lhs_type, rhs_type;
- enum { NARROW, NONE, WIDEN } modifier;
+ /* For conversions between floating point and integer, there're 2 NARROW
+ cases. NARROW_SRC is for FLOAT_EXPR, means
+ integer --DEMOTION--> integer --FLOAT_EXPR--> floating point.
+ This is safe when the range of the source integer can fit into the lower
+ precision. NARROW_DST is for FIX_TRUNC_EXPR, means
+ floating point --FIX_TRUNC_EXPR--> integer --DEMOTION--> INTEGER.
+ For other conversions, when there's narrowing, NARROW_DST is used as
+ default. */
+ enum { NARROW_SRC, NARROW_DST, NONE, WIDEN } modifier;
vec<tree> vec_oprnds0 = vNULL;
vec<tree> vec_oprnds1 = vNULL;
tree vop0;
else
modifier = NONE;
else if (multiple_p (nunits_out, nunits_in))
- modifier = NARROW;
+ modifier = NARROW_DST;
else
{
gcc_checking_assert (multiple_p (nunits_in, nunits_out));
case of SLP. */
if (slp_node)
ncopies = 1;
- else if (modifier == NARROW)
+ else if (modifier == NARROW_DST)
ncopies = vect_get_num_copies (loop_vinfo, vectype_out);
else
ncopies = vect_get_num_copies (loop_vinfo, vectype_in);
}
break;
- case NARROW:
+ case NARROW_DST:
gcc_assert (op_type == unary_op);
if (supportable_narrowing_operation (code, vectype_out, vectype_in,
&code1, &multi_step_cvt,
&interm_types))
break;
- if (code != FIX_TRUNC_EXPR
- || GET_MODE_SIZE (lhs_mode) >= GET_MODE_SIZE (rhs_mode))
+ if (GET_MODE_SIZE (lhs_mode) >= GET_MODE_SIZE (rhs_mode))
goto unsupported;
- cvt_type
- = build_nonstandard_integer_type (GET_MODE_BITSIZE (rhs_mode), 0);
- cvt_type = get_same_sized_vectype (cvt_type, vectype_in);
- if (cvt_type == NULL_TREE)
- goto unsupported;
- if (!supportable_convert_operation (code, cvt_type, vectype_in,
- &codecvt1))
- goto unsupported;
- if (supportable_narrowing_operation (NOP_EXPR, vectype_out, cvt_type,
- &code1, &multi_step_cvt,
- &interm_types))
- break;
+ if (code == FIX_TRUNC_EXPR)
+ {
+ cvt_type
+ = build_nonstandard_integer_type (GET_MODE_BITSIZE (rhs_mode), 0);
+ cvt_type = get_same_sized_vectype (cvt_type, vectype_in);
+ if (cvt_type == NULL_TREE)
+ goto unsupported;
+ if (!supportable_convert_operation (code, cvt_type, vectype_in,
+ &codecvt1))
+ goto unsupported;
+ if (supportable_narrowing_operation (NOP_EXPR, vectype_out, cvt_type,
+ &code1, &multi_step_cvt,
+ &interm_types))
+ break;
+ }
+ /* If op0 can be represented with low precision integer,
+ truncate it to cvt_type and the do FLOAT_EXPR. */
+ else if (code == FLOAT_EXPR)
+ {
+ wide_int op_min_value, op_max_value;
+ if (!vect_get_range_info (op0, &op_min_value, &op_max_value))
+ goto unsupported;
+
+ cvt_type
+ = build_nonstandard_integer_type (GET_MODE_BITSIZE (lhs_mode), 0);
+ if (cvt_type == NULL_TREE
+ || (wi::min_precision (op_max_value, SIGNED)
+ > TYPE_PRECISION (cvt_type))
+ || (wi::min_precision (op_min_value, SIGNED)
+ > TYPE_PRECISION (cvt_type)))
+ goto unsupported;
+
+ cvt_type = get_same_sized_vectype (cvt_type, vectype_out);
+ if (cvt_type == NULL_TREE)
+ goto unsupported;
+ if (!supportable_narrowing_operation (NOP_EXPR, cvt_type, vectype_in,
+ &code1, &multi_step_cvt,
+ &interm_types))
+ goto unsupported;
+ if (supportable_convert_operation (code, vectype_out,
+ cvt_type, &codecvt1))
+ {
+ modifier = NARROW_SRC;
+ break;
+ }
+ }
+
goto unsupported;
default:
vect_model_simple_cost (vinfo, stmt_info, ncopies, dt, ndts, slp_node,
cost_vec);
}
- else if (modifier == NARROW)
+ else if (modifier == NARROW_SRC || modifier == NARROW_DST)
{
STMT_VINFO_TYPE (stmt_info) = type_demotion_vec_info_type;
/* The final packing step produces one vector result per copy. */
from supportable_*_operation, and store them in the correct order
for future use in vect_create_vectorized_*_stmts (). */
auto_vec<tree> vec_dsts (multi_step_cvt + 1);
+ bool widen_or_narrow_float_p
+ = cvt_type && (modifier == WIDEN || modifier == NARROW_SRC);
vec_dest = vect_create_destination_var (scalar_dest,
- (cvt_type && modifier == WIDEN)
+ widen_or_narrow_float_p
? cvt_type : vectype_out);
vec_dsts.quick_push (vec_dest);
if (cvt_type)
vec_dest = vect_create_destination_var (scalar_dest,
- modifier == WIDEN
+ widen_or_narrow_float_p
? vectype_out : cvt_type);
int ninputs = 1;
{
if (modifier == WIDEN)
;
- else if (modifier == NARROW)
+ else if (modifier == NARROW_SRC || modifier == NARROW_DST)
{
if (multi_step_cvt)
ninputs = vect_pow2 (multi_step_cvt);
}
break;
- case NARROW:
+ case NARROW_SRC:
+ case NARROW_DST:
/* In case the vectorization factor (VF) is bigger than the number
of elements that we can fit in a vectype (nunits), we have to
generate more than one vector stmt - i.e - we need to "unroll"
vect_get_vec_defs (vinfo, stmt_info, slp_node, ncopies * ninputs,
op0, &vec_oprnds0);
/* Arguments are ready. Create the new vector stmts. */
- if (cvt_type)
+ if (cvt_type && modifier == NARROW_DST)
FOR_EACH_VEC_ELT (vec_oprnds0, i, vop0)
{
gcc_assert (TREE_CODE_LENGTH (codecvt1) == unary_op);
vect_create_vectorized_demotion_stmts (vinfo, &vec_oprnds0,
multi_step_cvt,
stmt_info, vec_dsts, gsi,
- slp_node, code1);
+ slp_node, code1,
+ modifier == NARROW_SRC);
+ /* After demoting op0 to cvt_type, convert it to dest. */
+ if (cvt_type && code == FLOAT_EXPR)
+ {
+ for (unsigned int i = 0; i != vec_oprnds0.length() / 2; i++)
+ {
+ /* Arguments are ready, create the new vector stmt. */
+ gcc_assert (TREE_CODE_LENGTH (codecvt1) == unary_op);
+ gassign *new_stmt
+ = gimple_build_assign (vec_dest, codecvt1, vec_oprnds0[i]);
+ new_temp = make_ssa_name (vec_dest, new_stmt);
+ gimple_assign_set_lhs (new_stmt, new_temp);
+ vect_finish_stmt_generation (vinfo, stmt_info, new_stmt, gsi);
+
+ /* This is the last step of the conversion sequence. Store the
+ vectors in SLP_NODE or in vector info of the scalar statement
+ (or in STMT_VINFO_RELATED_STMT chain). */
+ if (slp_node)
+ SLP_TREE_VEC_STMTS (slp_node).quick_push (new_stmt);
+ else
+ STMT_VINFO_VEC_STMTS (stmt_info).safe_push (new_stmt);
+ }
+ }
break;
}
if (!slp_node)
projects / thirdparty / gcc.git / commitdiff
