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-rw-r--r--gcc/omp-low.c79
1 files changed, 68 insertions, 11 deletions
diff --git a/gcc/omp-low.c b/gcc/omp-low.c
index 6c52bff..eab0af5 100644
--- a/gcc/omp-low.c
+++ b/gcc/omp-low.c
@@ -278,6 +278,7 @@ static bool omp_any_child_fn_dumped;
static void scan_omp (gimple_seq *, omp_context *);
static tree scan_omp_1_op (tree *, int *, void *);
static gphi *find_phi_with_arg_on_edge (tree, edge);
+static int omp_max_simt_vf (void);
#define WALK_SUBSTMTS \
case GIMPLE_BIND: \
@@ -2192,6 +2193,7 @@ scan_sharing_clauses (tree clauses, omp_context *ctx,
case OMP_CLAUSE_INDEPENDENT:
case OMP_CLAUSE_AUTO:
case OMP_CLAUSE_SEQ:
+ case OMP_CLAUSE__SIMT_:
break;
case OMP_CLAUSE_ALIGNED:
@@ -2363,6 +2365,7 @@ scan_sharing_clauses (tree clauses, omp_context *ctx,
case OMP_CLAUSE_AUTO:
case OMP_CLAUSE_SEQ:
case OMP_CLAUSE__GRIDDIM_:
+ case OMP_CLAUSE__SIMT_:
break;
case OMP_CLAUSE_TILE:
@@ -3066,6 +3069,48 @@ scan_omp_for (gomp_for *stmt, omp_context *outer_ctx)
scan_omp (gimple_omp_body_ptr (stmt), ctx);
}
+/* Duplicate #pragma omp simd, one for SIMT, another one for SIMD. */
+
+static void
+scan_omp_simd (gimple_stmt_iterator *gsi, gomp_for *stmt,
+ omp_context *outer_ctx)
+{
+ gbind *bind = gimple_build_bind (NULL, NULL, NULL);
+ gsi_replace (gsi, bind, false);
+ gimple_seq seq = NULL;
+ gimple *g = gimple_build_call_internal (IFN_GOMP_USE_SIMT, 0);
+ tree cond = create_tmp_var_raw (integer_type_node);
+ DECL_CONTEXT (cond) = current_function_decl;
+ DECL_SEEN_IN_BIND_EXPR_P (cond) = 1;
+ gimple_bind_set_vars (bind, cond);
+ gimple_call_set_lhs (g, cond);
+ gimple_seq_add_stmt (&seq, g);
+ tree lab1 = create_artificial_label (UNKNOWN_LOCATION);
+ tree lab2 = create_artificial_label (UNKNOWN_LOCATION);
+ tree lab3 = create_artificial_label (UNKNOWN_LOCATION);
+ g = gimple_build_cond (NE_EXPR, cond, integer_zero_node, lab1, lab2);
+ gimple_seq_add_stmt (&seq, g);
+ g = gimple_build_label (lab1);
+ gimple_seq_add_stmt (&seq, g);
+ gimple_seq new_seq = copy_gimple_seq_and_replace_locals (stmt);
+ gomp_for *new_stmt = as_a <gomp_for *> (new_seq);
+ tree clause = build_omp_clause (gimple_location (stmt), OMP_CLAUSE__SIMT_);
+ OMP_CLAUSE_CHAIN (clause) = gimple_omp_for_clauses (new_stmt);
+ gimple_omp_for_set_clauses (new_stmt, clause);
+ gimple_seq_add_stmt (&seq, new_stmt);
+ g = gimple_build_goto (lab3);
+ gimple_seq_add_stmt (&seq, g);
+ g = gimple_build_label (lab2);
+ gimple_seq_add_stmt (&seq, g);
+ gimple_seq_add_stmt (&seq, stmt);
+ g = gimple_build_label (lab3);
+ gimple_seq_add_stmt (&seq, g);
+ gimple_bind_set_body (bind, seq);
+ update_stmt (bind);
+ scan_omp_for (new_stmt, outer_ctx);
+ scan_omp_for (stmt, outer_ctx);
+}
+
/* Scan an OpenMP sections directive. */
static void
@@ -3969,7 +4014,13 @@ scan_omp_1_stmt (gimple_stmt_iterator *gsi, bool *handled_ops_p,
break;
case GIMPLE_OMP_FOR:
- scan_omp_for (as_a <gomp_for *> (stmt), ctx);
+ if (((gimple_omp_for_kind (as_a <gomp_for *> (stmt))
+ & GF_OMP_FOR_KIND_MASK) == GF_OMP_FOR_KIND_SIMD)
+ && omp_maybe_offloaded_ctx (ctx)
+ && omp_max_simt_vf ())
+ scan_omp_simd (gsi, as_a <gomp_for *> (stmt), ctx);
+ else
+ scan_omp_for (as_a <gomp_for *> (stmt), ctx);
break;
case GIMPLE_OMP_SECTIONS:
@@ -4316,8 +4367,7 @@ omp_max_vf (void)
if (GET_MODE_CLASS (vqimode) == MODE_VECTOR_INT)
vf = GET_MODE_NUNITS (vqimode);
}
- int svf = omp_max_simt_vf ();
- return MAX (vf, svf);
+ return vf;
}
/* Helper function of lower_rec_input_clauses, used for #pragma omp simd
@@ -4329,7 +4379,11 @@ lower_rec_simd_input_clauses (tree new_var, omp_context *ctx, int &max_vf,
{
if (max_vf == 0)
{
- max_vf = omp_max_vf ();
+ if (find_omp_clause (gimple_omp_for_clauses (ctx->stmt),
+ OMP_CLAUSE__SIMT_))
+ max_vf = omp_max_simt_vf ();
+ else
+ max_vf = omp_max_vf ();
if (max_vf > 1)
{
tree c = find_omp_clause (gimple_omp_for_clauses (ctx->stmt),
@@ -4405,8 +4459,7 @@ lower_rec_input_clauses (tree clauses, gimple_seq *ilist, gimple_seq *dlist,
int pass;
bool is_simd = (gimple_code (ctx->stmt) == GIMPLE_OMP_FOR
&& gimple_omp_for_kind (ctx->stmt) & GF_OMP_FOR_SIMD);
- bool maybe_simt
- = is_simd && omp_maybe_offloaded_ctx (ctx) && omp_max_simt_vf () > 1;
+ bool maybe_simt = is_simd && find_omp_clause (clauses, OMP_CLAUSE__SIMT_);
int max_vf = 0;
tree lane = NULL_TREE, idx = NULL_TREE;
tree simt_lane = NULL_TREE;
@@ -5497,7 +5550,7 @@ lower_lastprivate_clauses (tree clauses, tree predicate, gimple_seq *stmt_list,
if (gimple_code (ctx->stmt) == GIMPLE_OMP_FOR
&& gimple_omp_for_kind (ctx->stmt) & GF_OMP_FOR_SIMD)
{
- maybe_simt = omp_maybe_offloaded_ctx (ctx) && omp_max_simt_vf () > 1;
+ maybe_simt = find_omp_clause (orig_clauses, OMP_CLAUSE__SIMT_);
simduid = find_omp_clause (orig_clauses, OMP_CLAUSE__SIMDUID_);
if (simduid)
simduid = OMP_CLAUSE__SIMDUID__DECL (simduid);
@@ -10749,10 +10802,9 @@ expand_omp_simd (struct omp_region *region, struct omp_for_data *fd)
}
tree step = fd->loop.step;
- bool offloaded = cgraph_node::get (current_function_decl)->offloadable;
- for (struct omp_region *rgn = region; !offloaded && rgn; rgn = rgn->outer)
- offloaded = rgn->type == GIMPLE_OMP_TARGET;
- bool is_simt = offloaded && omp_max_simt_vf () > 1 && safelen_int > 1;
+ bool is_simt = (safelen_int > 1
+ && find_omp_clause (gimple_omp_for_clauses (fd->for_stmt),
+ OMP_CLAUSE__SIMT_));
tree simt_lane = NULL_TREE, simt_maxlane = NULL_TREE;
if (is_simt)
{
@@ -15006,6 +15058,8 @@ lower_omp_ordered (gimple_stmt_iterator *gsi_p, omp_context *ctx)
gbind *bind;
bool simd = find_omp_clause (gimple_omp_ordered_clauses (ord_stmt),
OMP_CLAUSE_SIMD);
+ /* FIXME: this should check presence of OMP_CLAUSE__SIMT_ on the enclosing
+ loop. */
bool maybe_simt
= simd && omp_maybe_offloaded_ctx (ctx) && omp_max_simt_vf () > 1;
bool threads = find_omp_clause (gimple_omp_ordered_clauses (ord_stmt),
@@ -20167,6 +20221,9 @@ execute_omp_device_lower ()
tree type = lhs ? TREE_TYPE (lhs) : integer_type_node;
switch (gimple_call_internal_fn (stmt))
{
+ case IFN_GOMP_USE_SIMT:
+ rhs = vf == 1 ? integer_zero_node : integer_one_node;
+ break;
case IFN_GOMP_SIMT_LANE:
case IFN_GOMP_SIMT_LAST_LANE:
rhs = vf == 1 ? build_zero_cst (type) : NULL_TREE;
generated by cgit v1.1 at 2025-06-02 02:50:48 +0000