static tree check_omp_for_incr_expr (location_t loc, tree exp, tree decl) { tree t; if (!INTEGRAL_TYPE_P (TREE_TYPE (exp)) || TYPE_PRECISION (TREE_TYPE (exp)) < TYPE_PRECISION (TREE_TYPE (decl))) return error_mark_node; if (exp == decl) return build_int_cst (TREE_TYPE (exp), 0); switch (TREE_CODE (exp)) { CASE_CONVERT: t = check_omp_for_incr_expr (loc, TREE_OPERAND (exp, 0), decl); if (t != error_mark_node) return fold_convert_loc (loc, TREE_TYPE (exp), t); break; case MINUS_EXPR: t = check_omp_for_incr_expr (loc, TREE_OPERAND (exp, 0), decl); if (t != error_mark_node) return fold_build2_loc (loc, MINUS_EXPR, TREE_TYPE (exp), t, TREE_OPERAND (exp, 1)); break; case PLUS_EXPR: t = check_omp_for_incr_expr (loc, TREE_OPERAND (exp, 0), decl); if (t != error_mark_node) return fold_build2_loc (loc, PLUS_EXPR, TREE_TYPE (exp), t, TREE_OPERAND (exp, 1)); t = check_omp_for_incr_expr (loc, TREE_OPERAND (exp, 1), decl); if (t != error_mark_node) return fold_build2_loc (loc, PLUS_EXPR, TREE_TYPE (exp), TREE_OPERAND (exp, 0), t); break; default: break; } return error_mark_node; }
tree c_finish_omp_for (location_t locus, tree decl, tree init, tree cond, tree incr, tree body, tree pre_body) { location_t elocus = locus; bool fail = false; if (EXPR_HAS_LOCATION (init)) elocus = EXPR_LOCATION (init); /* Validate the iteration variable. */ if (!INTEGRAL_TYPE_P (TREE_TYPE (decl))) { error ("%Hinvalid type for iteration variable %qE", &elocus, decl); fail = true; } if (TYPE_UNSIGNED (TREE_TYPE (decl))) warning (0, "%Hiteration variable %qE is unsigned", &elocus, decl); /* In the case of "for (int i = 0...)", init will be a decl. It should have a DECL_INITIAL that we can turn into an assignment. */ if (init == decl) { elocus = DECL_SOURCE_LOCATION (decl); init = DECL_INITIAL (decl); if (init == NULL) { error ("%H%qE is not initialized", &elocus, decl); init = integer_zero_node; fail = true; } init = build_modify_expr (decl, NOP_EXPR, init); SET_EXPR_LOCATION (init, elocus); } gcc_assert (TREE_CODE (init) == MODIFY_EXPR); gcc_assert (TREE_OPERAND (init, 0) == decl); if (cond == NULL_TREE) { error ("%Hmissing controlling predicate", &elocus); fail = true; } else { bool cond_ok = false; if (EXPR_HAS_LOCATION (cond)) elocus = EXPR_LOCATION (cond); if (TREE_CODE (cond) == LT_EXPR || TREE_CODE (cond) == LE_EXPR || TREE_CODE (cond) == GT_EXPR || TREE_CODE (cond) == GE_EXPR) { tree op0 = TREE_OPERAND (cond, 0); tree op1 = TREE_OPERAND (cond, 1); /* 2.5.1. The comparison in the condition is computed in the type of DECL, otherwise the behavior is undefined. For example: long n; int i; i < n; according to ISO will be evaluated as: (long)i < n; We want to force: i < (int)n; */ if (TREE_CODE (op0) == NOP_EXPR && decl == TREE_OPERAND (op0, 0)) { TREE_OPERAND (cond, 0) = TREE_OPERAND (op0, 0); TREE_OPERAND (cond, 1) = fold_build1 (NOP_EXPR, TREE_TYPE (decl), TREE_OPERAND (cond, 1)); } else if (TREE_CODE (op1) == NOP_EXPR && decl == TREE_OPERAND (op1, 0)) { TREE_OPERAND (cond, 1) = TREE_OPERAND (op1, 0); TREE_OPERAND (cond, 0) = fold_build1 (NOP_EXPR, TREE_TYPE (decl), TREE_OPERAND (cond, 0)); } if (decl == TREE_OPERAND (cond, 0)) cond_ok = true; else if (decl == TREE_OPERAND (cond, 1)) { TREE_SET_CODE (cond, swap_tree_comparison (TREE_CODE (cond))); TREE_OPERAND (cond, 1) = TREE_OPERAND (cond, 0); TREE_OPERAND (cond, 0) = decl; cond_ok = true; } } if (!cond_ok) { error ("%Hinvalid controlling predicate", &elocus); fail = true; } } if (incr == NULL_TREE) { error ("%Hmissing increment expression", &elocus); fail = true; } else { bool incr_ok = false; if (EXPR_HAS_LOCATION (incr)) elocus = EXPR_LOCATION (incr); /* Check all the valid increment expressions: v++, v--, ++v, --v, v = v + incr, v = incr + v and v = v - incr. */ switch (TREE_CODE (incr)) { case POSTINCREMENT_EXPR: case PREINCREMENT_EXPR: case POSTDECREMENT_EXPR: case PREDECREMENT_EXPR: incr_ok = (TREE_OPERAND (incr, 0) == decl); break; case MODIFY_EXPR: if (TREE_OPERAND (incr, 0) != decl) break; if (TREE_OPERAND (incr, 1) == decl) break; if (TREE_CODE (TREE_OPERAND (incr, 1)) == PLUS_EXPR && (TREE_OPERAND (TREE_OPERAND (incr, 1), 0) == decl || TREE_OPERAND (TREE_OPERAND (incr, 1), 1) == decl)) incr_ok = true; else if (TREE_CODE (TREE_OPERAND (incr, 1)) == MINUS_EXPR && TREE_OPERAND (TREE_OPERAND (incr, 1), 0) == decl) incr_ok = true; else { tree t = check_omp_for_incr_expr (TREE_OPERAND (incr, 1), decl); if (t != error_mark_node) { incr_ok = true; t = build2 (PLUS_EXPR, TREE_TYPE (decl), decl, t); incr = build2 (MODIFY_EXPR, void_type_node, decl, t); } } break; default: break; } if (!incr_ok) { error ("%Hinvalid increment expression", &elocus); fail = true; } } if (fail) return NULL; else { tree t = make_node (OMP_FOR); TREE_TYPE (t) = void_type_node; OMP_FOR_INIT (t) = init; OMP_FOR_COND (t) = cond; OMP_FOR_INCR (t) = incr; OMP_FOR_BODY (t) = body; OMP_FOR_PRE_BODY (t) = pre_body; SET_EXPR_LOCATION (t, locus); return add_stmt (t); } }
tree c_finish_omp_for (location_t locus, enum tree_code code, tree declv, tree orig_declv, tree initv, tree condv, tree incrv, tree body, tree pre_body) { location_t elocus; bool fail = false; int i; if ((code == CILK_SIMD || code == CILK_FOR) && !c_check_cilk_loop (locus, TREE_VEC_ELT (declv, 0))) fail = true; gcc_assert (TREE_VEC_LENGTH (declv) == TREE_VEC_LENGTH (initv)); gcc_assert (TREE_VEC_LENGTH (declv) == TREE_VEC_LENGTH (condv)); gcc_assert (TREE_VEC_LENGTH (declv) == TREE_VEC_LENGTH (incrv)); for (i = 0; i < TREE_VEC_LENGTH (declv); i++) { tree decl = TREE_VEC_ELT (declv, i); tree init = TREE_VEC_ELT (initv, i); tree cond = TREE_VEC_ELT (condv, i); tree incr = TREE_VEC_ELT (incrv, i); elocus = locus; if (EXPR_HAS_LOCATION (init)) elocus = EXPR_LOCATION (init); /* Validate the iteration variable. */ if (!INTEGRAL_TYPE_P (TREE_TYPE (decl)) && TREE_CODE (TREE_TYPE (decl)) != POINTER_TYPE) { error_at (elocus, "invalid type for iteration variable %qE", decl); fail = true; } /* In the case of "for (int i = 0...)", init will be a decl. It should have a DECL_INITIAL that we can turn into an assignment. */ if (init == decl) { elocus = DECL_SOURCE_LOCATION (decl); init = DECL_INITIAL (decl); if (init == NULL) { error_at (elocus, "%qE is not initialized", decl); init = integer_zero_node; fail = true; } DECL_INITIAL (decl) = NULL_TREE; init = build_modify_expr (elocus, decl, NULL_TREE, NOP_EXPR, /* FIXME diagnostics: This should be the location of the INIT. */ elocus, init, NULL_TREE); } if (init != error_mark_node) { gcc_assert (TREE_CODE (init) == MODIFY_EXPR); gcc_assert (TREE_OPERAND (init, 0) == decl); } if (cond == NULL_TREE) { error_at (elocus, "missing controlling predicate"); fail = true; } else { bool cond_ok = false; if (EXPR_HAS_LOCATION (cond)) elocus = EXPR_LOCATION (cond); if (TREE_CODE (cond) == LT_EXPR || TREE_CODE (cond) == LE_EXPR || TREE_CODE (cond) == GT_EXPR || TREE_CODE (cond) == GE_EXPR || TREE_CODE (cond) == NE_EXPR || TREE_CODE (cond) == EQ_EXPR) { tree op0 = TREE_OPERAND (cond, 0); tree op1 = TREE_OPERAND (cond, 1); /* 2.5.1. The comparison in the condition is computed in the type of DECL, otherwise the behavior is undefined. For example: long n; int i; i < n; according to ISO will be evaluated as: (long)i < n; We want to force: i < (int)n; */ if (TREE_CODE (op0) == NOP_EXPR && decl == TREE_OPERAND (op0, 0)) { TREE_OPERAND (cond, 0) = TREE_OPERAND (op0, 0); TREE_OPERAND (cond, 1) = fold_build1_loc (elocus, NOP_EXPR, TREE_TYPE (decl), TREE_OPERAND (cond, 1)); } else if (TREE_CODE (op1) == NOP_EXPR && decl == TREE_OPERAND (op1, 0)) { TREE_OPERAND (cond, 1) = TREE_OPERAND (op1, 0); TREE_OPERAND (cond, 0) = fold_build1_loc (elocus, NOP_EXPR, TREE_TYPE (decl), TREE_OPERAND (cond, 0)); } if (decl == TREE_OPERAND (cond, 0)) cond_ok = true; else if (decl == TREE_OPERAND (cond, 1)) { TREE_SET_CODE (cond, swap_tree_comparison (TREE_CODE (cond))); TREE_OPERAND (cond, 1) = TREE_OPERAND (cond, 0); TREE_OPERAND (cond, 0) = decl; cond_ok = true; } if (TREE_CODE (cond) == NE_EXPR || TREE_CODE (cond) == EQ_EXPR) { if (!INTEGRAL_TYPE_P (TREE_TYPE (decl))) { if (code != CILK_SIMD && code != CILK_FOR) cond_ok = false; } else if (operand_equal_p (TREE_OPERAND (cond, 1), TYPE_MIN_VALUE (TREE_TYPE (decl)), 0)) TREE_SET_CODE (cond, TREE_CODE (cond) == NE_EXPR ? GT_EXPR : LE_EXPR); else if (operand_equal_p (TREE_OPERAND (cond, 1), TYPE_MAX_VALUE (TREE_TYPE (decl)), 0)) TREE_SET_CODE (cond, TREE_CODE (cond) == NE_EXPR ? LT_EXPR : GE_EXPR); else if (code != CILK_SIMD && code != CILK_FOR) cond_ok = false; } } if (!cond_ok) { error_at (elocus, "invalid controlling predicate"); fail = true; } } if (incr == NULL_TREE) { error_at (elocus, "missing increment expression"); fail = true; } else { bool incr_ok = false; if (EXPR_HAS_LOCATION (incr)) elocus = EXPR_LOCATION (incr); /* Check all the valid increment expressions: v++, v--, ++v, --v, v = v + incr, v = incr + v and v = v - incr. */ switch (TREE_CODE (incr)) { case POSTINCREMENT_EXPR: case PREINCREMENT_EXPR: case POSTDECREMENT_EXPR: case PREDECREMENT_EXPR: if (TREE_OPERAND (incr, 0) != decl) break; incr_ok = true; incr = c_omp_for_incr_canonicalize_ptr (elocus, decl, incr); break; case COMPOUND_EXPR: if (TREE_CODE (TREE_OPERAND (incr, 0)) != SAVE_EXPR || TREE_CODE (TREE_OPERAND (incr, 1)) != MODIFY_EXPR) break; incr = TREE_OPERAND (incr, 1); /* FALLTHRU */ case MODIFY_EXPR: if (TREE_OPERAND (incr, 0) != decl) break; if (TREE_OPERAND (incr, 1) == decl) break; if (TREE_CODE (TREE_OPERAND (incr, 1)) == PLUS_EXPR && (TREE_OPERAND (TREE_OPERAND (incr, 1), 0) == decl || TREE_OPERAND (TREE_OPERAND (incr, 1), 1) == decl)) incr_ok = true; else if ((TREE_CODE (TREE_OPERAND (incr, 1)) == MINUS_EXPR || (TREE_CODE (TREE_OPERAND (incr, 1)) == POINTER_PLUS_EXPR)) && TREE_OPERAND (TREE_OPERAND (incr, 1), 0) == decl) incr_ok = true; else { tree t = check_omp_for_incr_expr (elocus, TREE_OPERAND (incr, 1), decl); if (t != error_mark_node) { incr_ok = true; t = build2 (PLUS_EXPR, TREE_TYPE (decl), decl, t); incr = build2 (MODIFY_EXPR, void_type_node, decl, t); } } break; default: break; } if (!incr_ok) { error_at (elocus, "invalid increment expression"); fail = true; } } TREE_VEC_ELT (initv, i) = init; TREE_VEC_ELT (incrv, i) = incr; } if (fail) return NULL; else { tree t = make_node (code); TREE_TYPE (t) = void_type_node; OMP_FOR_INIT (t) = initv; OMP_FOR_COND (t) = condv; OMP_FOR_INCR (t) = incrv; OMP_FOR_BODY (t) = body; OMP_FOR_PRE_BODY (t) = pre_body; if (code == OMP_FOR) OMP_FOR_ORIG_DECLS (t) = orig_declv; SET_EXPR_LOCATION (t, locus); return add_stmt (t); } }
static tree check_omp_for_incr_expr (location_t loc, tree exp, tree decl) { tree t; if (!INTEGRAL_TYPE_P (TREE_TYPE (exp)) || TYPE_PRECISION (TREE_TYPE (exp)) < TYPE_PRECISION (TREE_TYPE (decl))) return error_mark_node; if (exp == decl) return build_int_cst (TREE_TYPE (exp), 0); switch (TREE_CODE (exp)) { CASE_CONVERT: t = check_omp_for_incr_expr (loc, TREE_OPERAND (exp, 0), decl); if (t != error_mark_node) return fold_convert_loc (loc, TREE_TYPE (exp), t); break; case MINUS_EXPR: t = check_omp_for_incr_expr (loc, TREE_OPERAND (exp, 0), decl); if (t != error_mark_node) return fold_build2_loc (loc, MINUS_EXPR, TREE_TYPE (exp), t, TREE_OPERAND (exp, 1)); break; case PLUS_EXPR: t = check_omp_for_incr_expr (loc, TREE_OPERAND (exp, 0), decl); if (t != error_mark_node) return fold_build2_loc (loc, PLUS_EXPR, TREE_TYPE (exp), t, TREE_OPERAND (exp, 1)); t = check_omp_for_incr_expr (loc, TREE_OPERAND (exp, 1), decl); if (t != error_mark_node) return fold_build2_loc (loc, PLUS_EXPR, TREE_TYPE (exp), TREE_OPERAND (exp, 0), t); break; case COMPOUND_EXPR: { /* cp_build_modify_expr forces preevaluation of the RHS to make sure that it is evaluated before the lvalue-rvalue conversion is applied to the LHS. Reconstruct the original expression. */ tree op0 = TREE_OPERAND (exp, 0); if (TREE_CODE (op0) == TARGET_EXPR && !VOID_TYPE_P (TREE_TYPE (op0))) { tree op1 = TREE_OPERAND (exp, 1); tree temp = TARGET_EXPR_SLOT (op0); if (BINARY_CLASS_P (op1) && TREE_OPERAND (op1, 1) == temp) { op1 = copy_node (op1); TREE_OPERAND (op1, 1) = TARGET_EXPR_INITIAL (op0); return check_omp_for_incr_expr (loc, op1, decl); } } break; } default: break; } return error_mark_node; }