openmp: Support allocate for C/C++ array section reductions
This adds allocate clause support for array section reductions. Furthermore, it fixes one bug that would cause inscan reductions with allocate to be rejected by C, and for now just ignores allocate for inscan/task reductions, that will need slightly more work. 2020-11-13 Jakub Jelinek <jakub@redhat.com> gcc/ * omp-low.c (scan_sharing_clauses): For now remove for reduction clauses with inscan or task modifiers decl from allocate_map. (lower_private_allocate): Handle TYPE_P (new_var). (lower_rec_input_clauses): Handle allocate clause for C/C++ array reductions. gcc/c/ * c-typeck.c (c_finish_omp_clauses): Don't clear OMP_CLAUSE_REDUCTION_INSCAN unless reduction_seen == -2. libgomp/ * testsuite/libgomp.c-c++-common/allocate-1.c (foo): Add tests for array reductions. (main): Adjust foo callers.
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@ -15199,7 +15199,8 @@ c_finish_omp_clauses (tree clauses, enum c_omp_region_type ort)
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OMP_CLAUSE_LINEAR_STEP (c));
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remove = true;
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}
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else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION)
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else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION
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&& reduction_seen == -2)
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OMP_CLAUSE_REDUCTION_INSCAN (c) = 0;
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if (remove)
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@ -1197,6 +1197,14 @@ scan_sharing_clauses (tree clauses, omp_context *ctx)
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if (is_oacc_parallel_or_serial (ctx) || is_oacc_kernels (ctx))
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ctx->local_reduction_clauses
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= tree_cons (NULL, c, ctx->local_reduction_clauses);
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if ((OMP_CLAUSE_REDUCTION_INSCAN (c)
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|| OMP_CLAUSE_REDUCTION_TASK (c)) && ctx->allocate_map)
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{
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tree decl = OMP_CLAUSE_DECL (c);
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/* For now. */
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if (ctx->allocate_map->get (decl))
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ctx->allocate_map->remove (decl);
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}
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/* FALLTHRU */
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case OMP_CLAUSE_IN_REDUCTION:
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@ -4392,13 +4400,17 @@ lower_private_allocate (tree var, tree new_var, tree &allocator,
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if (allocator)
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return false;
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gcc_assert (allocate_ptr == NULL_TREE);
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if (ctx->allocate_map && DECL_P (new_var))
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if (ctx->allocate_map
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&& (DECL_P (new_var) || (TYPE_P (new_var) && size)))
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if (tree *allocatorp = ctx->allocate_map->get (var))
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allocator = *allocatorp;
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if (allocator == NULL_TREE)
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return false;
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if (!is_ref && omp_is_reference (var))
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return false;
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{
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allocator = NULL_TREE;
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return false;
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}
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if (TREE_CODE (allocator) != INTEGER_CST)
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allocator = build_outer_var_ref (allocator, ctx);
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@ -4410,19 +4422,24 @@ lower_private_allocate (tree var, tree new_var, tree &allocator,
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allocator = var;
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}
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tree ptr_type, align, sz;
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if (is_ref)
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tree ptr_type, align, sz = size;
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if (TYPE_P (new_var))
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{
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ptr_type = build_pointer_type (new_var);
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align = build_int_cst (size_type_node, TYPE_ALIGN_UNIT (new_var));
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}
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else if (is_ref)
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{
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ptr_type = build_pointer_type (TREE_TYPE (TREE_TYPE (new_var)));
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align = build_int_cst (size_type_node,
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TYPE_ALIGN_UNIT (TREE_TYPE (ptr_type)));
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sz = size;
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}
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else
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{
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ptr_type = build_pointer_type (TREE_TYPE (new_var));
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align = build_int_cst (size_type_node, DECL_ALIGN_UNIT (new_var));
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sz = fold_convert (size_type_node, DECL_SIZE_UNIT (new_var));
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if (sz == NULL_TREE)
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sz = fold_convert (size_type_node, DECL_SIZE_UNIT (new_var));
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}
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if (TREE_CODE (sz) != INTEGER_CST)
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{
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@ -4855,7 +4872,23 @@ lower_rec_input_clauses (tree clauses, gimple_seq *ilist, gimple_seq *dlist,
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tree type = TREE_TYPE (d);
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gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
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tree v = TYPE_MAX_VALUE (TYPE_DOMAIN (type));
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tree sz = v;
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const char *name = get_name (orig_var);
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if (pass != 3 && !TREE_CONSTANT (v))
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{
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tree t = maybe_lookup_decl (v, ctx);
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if (t)
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v = t;
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else
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v = maybe_lookup_decl_in_outer_ctx (v, ctx);
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gimplify_expr (&v, ilist, NULL, is_gimple_val, fb_rvalue);
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t = fold_build2_loc (clause_loc, PLUS_EXPR,
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TREE_TYPE (v), v,
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build_int_cst (TREE_TYPE (v), 1));
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sz = fold_build2_loc (clause_loc, MULT_EXPR,
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TREE_TYPE (v), t,
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TYPE_SIZE_UNIT (TREE_TYPE (type)));
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}
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if (pass == 3)
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{
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tree xv = create_tmp_var (ptr_type_node);
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@ -4913,6 +4946,13 @@ lower_rec_input_clauses (tree clauses, gimple_seq *ilist, gimple_seq *dlist,
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gimplify_assign (cond, x, ilist);
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x = xv;
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}
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else if (lower_private_allocate (var, type, allocator,
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allocate_ptr, ilist, ctx,
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true,
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TREE_CONSTANT (v)
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? TYPE_SIZE_UNIT (type)
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: sz))
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x = allocate_ptr;
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else if (TREE_CONSTANT (v))
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{
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x = create_tmp_var_raw (type, name);
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@ -4924,20 +4964,8 @@ lower_rec_input_clauses (tree clauses, gimple_seq *ilist, gimple_seq *dlist,
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{
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tree atmp
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= builtin_decl_explicit (BUILT_IN_ALLOCA_WITH_ALIGN);
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tree t = maybe_lookup_decl (v, ctx);
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if (t)
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v = t;
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else
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v = maybe_lookup_decl_in_outer_ctx (v, ctx);
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gimplify_expr (&v, ilist, NULL, is_gimple_val, fb_rvalue);
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t = fold_build2_loc (clause_loc, PLUS_EXPR,
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TREE_TYPE (v), v,
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build_int_cst (TREE_TYPE (v), 1));
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t = fold_build2_loc (clause_loc, MULT_EXPR,
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TREE_TYPE (v), t,
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TYPE_SIZE_UNIT (TREE_TYPE (type)));
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tree al = size_int (TYPE_ALIGN (TREE_TYPE (type)));
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x = build_call_expr_loc (clause_loc, atmp, 2, t, al);
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x = build_call_expr_loc (clause_loc, atmp, 2, sz, al);
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}
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tree ptype = build_pointer_type (TREE_TYPE (type));
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@ -5199,6 +5227,12 @@ lower_rec_input_clauses (tree clauses, gimple_seq *ilist, gimple_seq *dlist,
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gimple_seq_add_stmt (dlist, g);
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gimple_seq_add_stmt (dlist, gimple_build_label (end2));
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}
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if (allocator)
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{
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tree f = builtin_decl_explicit (BUILT_IN_GOMP_FREE);
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g = gimple_build_call (f, 2, allocate_ptr, allocator);
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gimple_seq_add_stmt (dlist, g);
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}
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continue;
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}
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else if (pass == 2)
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@ -3,7 +3,7 @@
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#include <stdint.h>
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void
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foo (int x, omp_allocator_handle_t h, int fl)
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foo (int x, int *p, int *q, int px, omp_allocator_handle_t h, int fl)
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{
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int y = 0, r = 0, i, i1, l, l2[4], l3, n = 8;
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int i2, j2, n2 = 9, l4;
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@ -11,7 +11,12 @@ foo (int x, omp_allocator_handle_t h, int fl)
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int i4, j4, n4 = 11, l6;
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int i5;
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int v[x], w[x];
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int r2[4] = { 0, 0, 0, 0 };
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int xo = x;
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for (i = 0; i < 4; i++)
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p[i] = 0;
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for (i = 0; i < 3; i++)
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q[i] = 0;
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for (i = 0; i < x; i++)
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w[i] = i;
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#pragma omp parallel private (y, v) firstprivate (x) allocate (x, y, v)
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@ -117,6 +122,21 @@ foo (int x, omp_allocator_handle_t h, int fl)
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if ((fl & 2) && (((uintptr_t) &i5) & 63) != 0)
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abort ();
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}
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#pragma omp for reduction(+:p[2:px], q[:3], r2) allocate(h: p, q, r2)
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for (i = 0; i < 32; i++)
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{
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p[2] += i;
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p[3] += 2 * i;
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q[0] += 3 * i;
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q[2] += 4 * i;
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r2[0] += 5 * i;
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r2[3] += 6 * i;
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/* Can't really rely on alignment of &p[0], the implementation could
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allocate the whole array or do what GCC does and allocate only part
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of it. */
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if ((fl & 1) && (((uintptr_t) &q[0] | (uintptr_t) &r2[0]) & 63) != 0)
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abort ();
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}
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}
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if (r != 64 * 63 / 2 || l != 63 || n != 8 + 16 * 64)
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abort ();
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@ -130,6 +150,10 @@ foo (int x, omp_allocator_handle_t h, int fl)
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abort ();
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if (i5 != 19)
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abort ();
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if (p[2] != (32 * 31) / 2 || p[3] != 2 * (32 * 31) / 2
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|| q[0] != 3 * (32 * 31) / 2 || q[2] != 4 * (32 * 31) / 2
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|| r2[0] != 5 * (32 * 31) / 2 || r2[3] != 6 * (32 * 31) / 2)
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abort ();
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}
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void
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@ -239,15 +263,16 @@ main ()
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{ omp_atk_fallback, omp_atv_null_fb } };
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omp_allocator_handle_t a
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= omp_init_allocator (omp_default_mem_space, 2, traits);
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int p[4], q[3];
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if (a == omp_null_allocator)
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abort ();
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omp_set_default_allocator (omp_default_mem_alloc);
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foo (42, omp_null_allocator, 0);
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foo (42, omp_default_mem_alloc, 0);
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foo (42, a, 1);
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foo (42, p, q, 2, omp_null_allocator, 0);
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foo (42, p, q, 2, omp_default_mem_alloc, 0);
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foo (42, p, q, 2, a, 1);
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omp_set_default_allocator (a);
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foo (42, omp_null_allocator, 3);
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foo (42, omp_default_mem_alloc, 2);
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foo (42, p, q, 2, omp_null_allocator, 3);
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foo (42, p, q, 2, omp_default_mem_alloc, 2);
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bar (42, a);
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omp_destroy_allocator (a);
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return 0;
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