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Diffstat (limited to 'gcc/jit/jit-playback.c')
| -rw-r--r-- | gcc/jit/jit-playback.c | 2100 |
1 files changed, 2100 insertions, 0 deletions
diff --git a/gcc/jit/jit-playback.c b/gcc/jit/jit-playback.c new file mode 100644 index 000000000000..285a3ef9d600 --- /dev/null +++ b/gcc/jit/jit-playback.c @@ -0,0 +1,2100 @@ +/* Internals of libgccjit: classes for playing back recorded API calls. + Copyright (C) 2013-2014 Free Software Foundation, Inc. + Contributed by David Malcolm <dmalcolm@redhat.com>. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "opts.h" +#include "tree.h" +#include "hash-map.h" +#include "is-a.h" +#include "plugin-api.h" +#include "vec.h" +#include "hashtab.h" +#include "hash-set.h" +#include "machmode.h" +#include "tm.h" +#include "hard-reg-set.h" +#include "function.h" +#include "ipa-ref.h" +#include "dumpfile.h" +#include "cgraph.h" +#include "toplev.h" +#include "timevar.h" +#include "tree-cfg.h" +#include "target.h" +#include "convert.h" +#include "stringpool.h" +#include "stor-layout.h" +#include "print-tree.h" +#include "gimplify.h" +#include "gcc-driver-name.h" + +#include "jit-common.h" +#include "jit-playback.h" + + +/* gcc::jit::playback::context::build_cast uses the convert.h API, + which in turn requires the frontend to provide a "convert" + function, apparently as a fallback. + + Hence we provide this dummy one, with the requirement that any casts + are handled before reaching this. */ +extern tree convert (tree type, tree expr); + +tree +convert (tree dst_type, tree expr) +{ + gcc_assert (gcc::jit::active_playback_ctxt); + gcc::jit::active_playback_ctxt->add_error (NULL, "unhandled conversion"); + fprintf (stderr, "input expression:\n"); + debug_tree (expr); + fprintf (stderr, "requested type:\n"); + debug_tree (dst_type); + return error_mark_node; +} + +namespace gcc { +namespace jit { + +/********************************************************************** + Playback. + **********************************************************************/ + +/* The constructor for gcc::jit::playback::context. */ + +playback::context::context (recording::context *ctxt) + : m_recording_ctxt (ctxt), + m_char_array_type_node (NULL), + m_const_char_ptr (NULL) +{ + m_functions.create (0); + m_source_files.create (0); + m_cached_locations.create (0); +} + +/* The destructor for gcc::jit::playback::context. */ + +playback::context::~context () +{ + if (get_bool_option (GCC_JIT_BOOL_OPTION_KEEP_INTERMEDIATES)) + fprintf (stderr, "intermediate files written to %s\n", m_path_tempdir); + else + { + /* Clean up .s/.so and tempdir. */ + if (m_path_s_file) + unlink (m_path_s_file); + if (m_path_so_file) + unlink (m_path_so_file); + if (m_path_tempdir) + rmdir (m_path_tempdir); + } + + free (m_path_template); + /* m_path_tempdir aliases m_path_template, or is NULL, so don't + attempt to free it . */ + free (m_path_c_file); + free (m_path_s_file); + free (m_path_so_file); + m_functions.release (); +} + +/* A playback::context can reference GC-managed pointers. Mark them + ("by hand", rather than by gengtype). + + This is called on the active playback context (if any) by the + my_ggc_walker hook in the jit_root_table in dummy-frontend.c. */ + +void +playback::context:: +gt_ggc_mx () +{ + int i; + function *func; + FOR_EACH_VEC_ELT (m_functions, i, func) + { + if (ggc_test_and_set_mark (func)) + func->gt_ggc_mx (); + } +} + +/* Given an enum gcc_jit_types value, get a "tree" type. */ + +static tree +get_tree_node_for_type (enum gcc_jit_types type_) +{ + switch (type_) + { + case GCC_JIT_TYPE_VOID: + return void_type_node; + + case GCC_JIT_TYPE_VOID_PTR: + return ptr_type_node; + + case GCC_JIT_TYPE_BOOL: + return boolean_type_node; + + case GCC_JIT_TYPE_CHAR: + return char_type_node; + case GCC_JIT_TYPE_SIGNED_CHAR: + return signed_char_type_node; + case GCC_JIT_TYPE_UNSIGNED_CHAR: + return unsigned_char_type_node; + + case GCC_JIT_TYPE_SHORT: + return short_integer_type_node; + case GCC_JIT_TYPE_UNSIGNED_SHORT: + return short_unsigned_type_node; + + case GCC_JIT_TYPE_CONST_CHAR_PTR: + { + tree const_char = build_qualified_type (char_type_node, + TYPE_QUAL_CONST); + return build_pointer_type (const_char); + } + + case GCC_JIT_TYPE_INT: + return integer_type_node; + case GCC_JIT_TYPE_UNSIGNED_INT: + return unsigned_type_node; + + case GCC_JIT_TYPE_LONG: + return long_integer_type_node; + case GCC_JIT_TYPE_UNSIGNED_LONG: + return long_unsigned_type_node; + + case GCC_JIT_TYPE_LONG_LONG: + return long_long_integer_type_node; + case GCC_JIT_TYPE_UNSIGNED_LONG_LONG: + return long_long_unsigned_type_node; + + case GCC_JIT_TYPE_FLOAT: + return float_type_node; + case GCC_JIT_TYPE_DOUBLE: + return double_type_node; + case GCC_JIT_TYPE_LONG_DOUBLE: + return long_double_type_node; + + case GCC_JIT_TYPE_SIZE_T: + return size_type_node; + + case GCC_JIT_TYPE_FILE_PTR: + return fileptr_type_node; + } + + return NULL; +} + +/* Construct a playback::type instance (wrapping a tree) for the given + enum value. */ + +playback::type * +playback::context:: +get_type (enum gcc_jit_types type_) +{ + tree type_node = get_tree_node_for_type (type_); + if (NULL == type_node) + { + add_error (NULL, + "unrecognized (enum gcc_jit_types) value: %i", type_); + return NULL; + } + + return new type (type_node); +} + +/* Construct a playback::type instance (wrapping a tree) for the given + array type. */ + +playback::type * +playback::context:: +new_array_type (playback::location *loc, + playback::type *element_type, + int num_elements) +{ + gcc_assert (element_type); + + tree t = build_array_type_nelts (element_type->as_tree (), + num_elements); + layout_type (t); + + if (loc) + set_tree_location (t, loc); + + return new type (t); +} + +/* Construct a playback::field instance (wrapping a tree). */ + +playback::field * +playback::context:: +new_field (location *loc, + type *type, + const char *name) +{ + gcc_assert (type); + gcc_assert (name); + + /* compare with c/c-decl.c:grokfield and grokdeclarator. */ + tree decl = build_decl (UNKNOWN_LOCATION, FIELD_DECL, + get_identifier (name), type->as_tree ()); + + if (loc) + set_tree_location (decl, loc); + + return new field (decl); +} + +/* Construct a playback::compound_type instance (wrapping a tree). */ + +playback::compound_type * +playback::context:: +new_compound_type (location *loc, + const char *name, + bool is_struct) /* else is union */ +{ + gcc_assert (name); + + /* Compare with c/c-decl.c: start_struct. */ + + tree t = make_node (is_struct ? RECORD_TYPE : UNION_TYPE); + TYPE_NAME (t) = get_identifier (name); + TYPE_SIZE (t) = 0; + + if (loc) + set_tree_location (t, loc); + + return new compound_type (t); +} + +void +playback::compound_type::set_fields (const vec<playback::field *> &fields) +{ + /* Compare with c/c-decl.c: finish_struct. */ + tree t = as_tree (); + + tree fieldlist = NULL; + for (unsigned i = 0; i < fields.length (); i++) + { + field *f = fields[i]; + DECL_CONTEXT (f->as_tree ()) = t; + fieldlist = chainon (f->as_tree (), fieldlist); + } + fieldlist = nreverse (fieldlist); + TYPE_FIELDS (t) = fieldlist; + + layout_type (t); +} + +/* Construct a playback::type instance (wrapping a tree) for a function + type. */ + +playback::type * +playback::context:: +new_function_type (type *return_type, + vec<type *> *param_types, + int is_variadic) +{ + int i; + type *param_type; + + tree *arg_types = (tree *)xcalloc(param_types->length (), sizeof(tree*)); + + FOR_EACH_VEC_ELT (*param_types, i, param_type) + arg_types[i] = param_type->as_tree (); + + tree fn_type; + if (is_variadic) + fn_type = + build_varargs_function_type_array (return_type->as_tree (), + param_types->length (), + arg_types); + else + fn_type = build_function_type_array (return_type->as_tree (), + param_types->length (), + arg_types); + free (arg_types); + + return new type (fn_type); +} + +/* Construct a playback::param instance (wrapping a tree). */ + +playback::param * +playback::context:: +new_param (location *loc, + type *type, + const char *name) +{ + gcc_assert (type); + gcc_assert (name); + tree inner = build_decl (UNKNOWN_LOCATION, PARM_DECL, + get_identifier (name), type->as_tree ()); + if (loc) + set_tree_location (inner, loc); + + return new param (this, inner); +} + +/* Construct a playback::function instance. */ + +playback::function * +playback::context:: +new_function (location *loc, + enum gcc_jit_function_kind kind, + type *return_type, + const char *name, + vec<param *> *params, + int is_variadic, + enum built_in_function builtin_id) +{ + int i; + param *param; + + //can return_type be NULL? + gcc_assert (name); + + tree *arg_types = (tree *)xcalloc(params->length (), sizeof(tree*)); + FOR_EACH_VEC_ELT (*params, i, param) + arg_types[i] = TREE_TYPE (param->as_tree ()); + + tree fn_type; + if (is_variadic) + fn_type = build_varargs_function_type_array (return_type->as_tree (), + params->length (), arg_types); + else + fn_type = build_function_type_array (return_type->as_tree (), + params->length (), arg_types); + free (arg_types); + + /* FIXME: this uses input_location: */ + tree fndecl = build_fn_decl (name, fn_type); + + if (loc) + set_tree_location (fndecl, loc); + + tree resdecl = build_decl (UNKNOWN_LOCATION, RESULT_DECL, + NULL_TREE, return_type->as_tree ()); + DECL_ARTIFICIAL (resdecl) = 1; + DECL_IGNORED_P (resdecl) = 1; + DECL_RESULT (fndecl) = resdecl; + + if (builtin_id) + { + DECL_BUILT_IN_CLASS (fndecl) = BUILT_IN_NORMAL; + DECL_FUNCTION_CODE (fndecl) = builtin_id; + gcc_assert (loc == NULL); + DECL_SOURCE_LOCATION (fndecl) = BUILTINS_LOCATION; + } + + if (kind != GCC_JIT_FUNCTION_IMPORTED) + { + tree param_decl_list = NULL; + FOR_EACH_VEC_ELT (*params, i, param) + { + param_decl_list = chainon (param->as_tree (), param_decl_list); + } + + /* The param list was created in reverse order; fix it: */ + param_decl_list = nreverse (param_decl_list); + + tree t; + for (t = param_decl_list; t; t = DECL_CHAIN (t)) + { + DECL_CONTEXT (t) = fndecl; + DECL_ARG_TYPE (t) = TREE_TYPE (t); + } + + /* Set it up on DECL_ARGUMENTS */ + DECL_ARGUMENTS(fndecl) = param_decl_list; + } + + if (kind == GCC_JIT_FUNCTION_ALWAYS_INLINE) + { + DECL_DECLARED_INLINE_P (fndecl) = 1; + + /* Add attribute "always_inline": */ + DECL_ATTRIBUTES (fndecl) = + tree_cons (get_identifier ("always_inline"), + NULL, + DECL_ATTRIBUTES (fndecl)); + } + + function *func = new function (this, fndecl, kind); + m_functions.safe_push (func); + return func; +} + +/* Construct a playback::lvalue instance (wrapping a tree). */ + +playback::lvalue * +playback::context:: +new_global (location *loc, + type *type, + const char *name) +{ + gcc_assert (type); + gcc_assert (name); + tree inner = build_decl (UNKNOWN_LOCATION, VAR_DECL, + get_identifier (name), + type->as_tree ()); + TREE_PUBLIC (inner) = 1; + DECL_COMMON (inner) = 1; + DECL_EXTERNAL (inner) = 1; + + if (loc) + set_tree_location (inner, loc); + + return new lvalue (this, inner); +} + +/* Construct a playback::rvalue instance (wrapping a tree). */ + +playback::rvalue * +playback::context:: +new_rvalue_from_int (type *type, + int value) +{ + // FIXME: type-checking, or coercion? + tree inner_type = type->as_tree (); + if (INTEGRAL_TYPE_P (inner_type)) + { + tree inner = build_int_cst (inner_type, value); + return new rvalue (this, inner); + } + else + { + REAL_VALUE_TYPE real_value; + real_from_integer (&real_value, VOIDmode, value, SIGNED); + tree inner = build_real (inner_type, real_value); + return new rvalue (this, inner); + } +} + +/* Construct a playback::rvalue instance (wrapping a tree). */ + +playback::rvalue * +playback::context:: +new_rvalue_from_double (type *type, + double value) +{ + // FIXME: type-checking, or coercion? + tree inner_type = type->as_tree (); + + /* We have a "double", we want a REAL_VALUE_TYPE. + + real.c:real_from_target appears to require the representation to be + split into 32-bit values, and then sent as an pair of host long + ints. */ + REAL_VALUE_TYPE real_value; + union + { + double as_double; + uint32_t as_uint32s[2]; + } u; + u.as_double = value; + long int as_long_ints[2]; + as_long_ints[0] = u.as_uint32s[0]; + as_long_ints[1] = u.as_uint32s[1]; + real_from_target (&real_value, as_long_ints, DFmode); + tree inner = build_real (inner_type, real_value); + return new rvalue (this, inner); +} + +/* Construct a playback::rvalue instance (wrapping a tree). */ + +playback::rvalue * +playback::context:: +new_rvalue_from_ptr (type *type, + void *value) +{ + tree inner_type = type->as_tree (); + /* FIXME: how to ensure we have a wide enough type? */ + tree inner = build_int_cstu (inner_type, (unsigned HOST_WIDE_INT)value); + return new rvalue (this, inner); +} + +/* Construct a playback::rvalue instance (wrapping a tree). */ + +playback::rvalue * +playback::context:: +new_string_literal (const char *value) +{ + tree t_str = build_string (strlen (value), value); + gcc_assert (m_char_array_type_node); + TREE_TYPE (t_str) = m_char_array_type_node; + + /* Convert to (const char*), loosely based on + c/c-typeck.c: array_to_pointer_conversion, + by taking address of start of string. */ + tree t_addr = build1 (ADDR_EXPR, m_const_char_ptr, t_str); + + return new rvalue (this, t_addr); +} + +/* Coerce a tree expression into a boolean tree expression. */ + +tree +playback::context:: +as_truth_value (tree expr, location *loc) +{ + /* Compare to c-typeck.c:c_objc_common_truthvalue_conversion */ + tree typed_zero = fold_build1 (CONVERT_EXPR, + TREE_TYPE (expr), + integer_zero_node); + if (loc) + set_tree_location (typed_zero, loc); + + expr = build2 (NE_EXPR, integer_type_node, expr, typed_zero); + if (loc) + set_tree_location (expr, loc); + + return expr; +} + +/* Construct a playback::rvalue instance (wrapping a tree) for a + unary op. */ + +playback::rvalue * +playback::context:: +new_unary_op (location *loc, + enum gcc_jit_unary_op op, + type *result_type, + rvalue *a) +{ + // FIXME: type-checking, or coercion? + enum tree_code inner_op; + + gcc_assert (result_type); + gcc_assert (a); + + tree node = a->as_tree (); + tree inner_result = NULL; + + switch (op) + { + default: + add_error (loc, "unrecognized (enum gcc_jit_unary_op) value: %i", op); + return NULL; + + case GCC_JIT_UNARY_OP_MINUS: + inner_op = NEGATE_EXPR; + break; + + case GCC_JIT_UNARY_OP_BITWISE_NEGATE: + inner_op = BIT_NOT_EXPR; + break; + + case GCC_JIT_UNARY_OP_LOGICAL_NEGATE: + node = as_truth_value (node, loc); + inner_result = invert_truthvalue (node); + if (loc) + set_tree_location (inner_result, loc); + return new rvalue (this, inner_result); + } + + inner_result = build1 (inner_op, + result_type->as_tree (), + node); + if (loc) + set_tree_location (inner_result, loc); + + return new rvalue (this, inner_result); +} + +/* Construct a playback::rvalue instance (wrapping a tree) for a + binary op. */ + +playback::rvalue * +playback::context:: +new_binary_op (location *loc, + enum gcc_jit_binary_op op, + type *result_type, + rvalue *a, rvalue *b) +{ + // FIXME: type-checking, or coercion? + enum tree_code inner_op; + + gcc_assert (result_type); + gcc_assert (a); + gcc_assert (b); + + tree node_a = a->as_tree (); + tree node_b = b->as_tree (); + + switch (op) + { + default: + add_error (loc, "unrecognized (enum gcc_jit_binary_op) value: %i", op); + return NULL; + + case GCC_JIT_BINARY_OP_PLUS: + inner_op = PLUS_EXPR; + break; + + case GCC_JIT_BINARY_OP_MINUS: + inner_op = MINUS_EXPR; + break; + + case GCC_JIT_BINARY_OP_MULT: + inner_op = MULT_EXPR; + break; + + case GCC_JIT_BINARY_OP_DIVIDE: + if (FLOAT_TYPE_P (result_type->as_tree ())) + /* Floating-point division: */ + inner_op = RDIV_EXPR; + else + /* Truncating to zero: */ + inner_op = TRUNC_DIV_EXPR; + break; + + case GCC_JIT_BINARY_OP_MODULO: + inner_op = TRUNC_MOD_EXPR; + break; + + case GCC_JIT_BINARY_OP_BITWISE_AND: + inner_op = BIT_AND_EXPR; + break; + + case GCC_JIT_BINARY_OP_BITWISE_XOR: + inner_op = BIT_XOR_EXPR; + break; + + case GCC_JIT_BINARY_OP_BITWISE_OR: + inner_op = BIT_IOR_EXPR; + break; + + case GCC_JIT_BINARY_OP_LOGICAL_AND: + node_a = as_truth_value (node_a, loc); + node_b = as_truth_value (node_b, loc); + inner_op = TRUTH_ANDIF_EXPR; + break; + + case GCC_JIT_BINARY_OP_LOGICAL_OR: + node_a = as_truth_value (node_a, loc); + node_b = as_truth_value (node_b, loc); + inner_op = TRUTH_ORIF_EXPR; + break; + + case GCC_JIT_BINARY_OP_LSHIFT: + inner_op = LSHIFT_EXPR; + break; + + case GCC_JIT_BINARY_OP_RSHIFT: + inner_op = RSHIFT_EXPR; + break; + } + + tree inner_expr = build2 (inner_op, + result_type->as_tree (), + node_a, + node_b); + if (loc) + set_tree_location (inner_expr, loc); + + return new rvalue (this, inner_expr); +} + +/* Construct a playback::rvalue instance (wrapping a tree) for a + comparison. */ + +playback::rvalue * +playback::context:: +new_comparison (location *loc, + enum gcc_jit_comparison op, + rvalue *a, rvalue *b) +{ + // FIXME: type-checking, or coercion? + enum tree_code inner_op; + + gcc_assert (a); + gcc_assert (b); + + switch (op) + { + default: + add_error (loc, "unrecognized (enum gcc_jit_comparison) value: %i", op); + return NULL; + + case GCC_JIT_COMPARISON_EQ: + inner_op = EQ_EXPR; + break; + case GCC_JIT_COMPARISON_NE: + inner_op = NE_EXPR; + break; + case GCC_JIT_COMPARISON_LT: + inner_op = LT_EXPR; + break; + case GCC_JIT_COMPARISON_LE: + inner_op = LE_EXPR; + break; + case GCC_JIT_COMPARISON_GT: + inner_op = GT_EXPR; + break; + case GCC_JIT_COMPARISON_GE: + inner_op = GE_EXPR; + break; + } + + tree inner_expr = build2 (inner_op, + boolean_type_node, + a->as_tree (), + b->as_tree ()); + if (loc) + set_tree_location (inner_expr, loc); + return new rvalue (this, inner_expr); +} + +/* Construct a playback::rvalue instance (wrapping a tree) for a + function call. */ + +playback::rvalue * +playback::context:: +build_call (location *loc, + tree fn_ptr, + vec<rvalue *> args) +{ + vec<tree, va_gc> *tree_args; + vec_alloc (tree_args, args.length ()); + for (unsigned i = 0; i < args.length (); i++) + tree_args->quick_push (args[i]->as_tree ()); + + if (loc) + set_tree_location (fn_ptr, loc); + + tree fn = TREE_TYPE (fn_ptr); + tree fn_type = TREE_TYPE (fn); + tree return_type = TREE_TYPE (fn_type); + + return new rvalue (this, + build_call_vec (return_type, + fn_ptr, tree_args)); + + /* see c-typeck.c: build_function_call + which calls build_function_call_vec + + which does lots of checking, then: + result = build_call_array_loc (loc, TREE_TYPE (fntype), + function, nargs, argarray); + which is in tree.c + (see also build_call_vec) + */ +} + +/* Construct a playback::rvalue instance (wrapping a tree) for a + call to a specific function. */ + +playback::rvalue * +playback::context:: +new_call (location *loc, + function *func, + vec<rvalue *> args) +{ + tree fndecl; + + gcc_assert (func); + + fndecl = func->as_fndecl (); + + tree fntype = TREE_TYPE (fndecl); + + tree fn = build1 (ADDR_EXPR, build_pointer_type (fntype), fndecl); + + return build_call (loc, fn, args); +} + +/* Construct a playback::rvalue instance (wrapping a tree) for a + call through a function pointer. */ + +playback::rvalue * +playback::context:: +new_call_through_ptr (location *loc, + rvalue *fn_ptr, + vec<rvalue *> args) +{ + gcc_assert (fn_ptr); + tree t_fn_ptr = fn_ptr->as_tree (); + + return build_call (loc, t_fn_ptr, args); +} + +/* Construct a tree for a cast. */ + +tree +playback::context::build_cast (playback::location *loc, + playback::rvalue *expr, + playback::type *type_) +{ + /* For comparison, see: + - c/c-typeck.c:build_c_cast + - c/c-convert.c: convert + - convert.h + + Only some kinds of cast are currently supported here. */ + tree t_expr = expr->as_tree (); + tree t_dst_type = type_->as_tree (); + tree t_ret = NULL; + t_ret = targetm.convert_to_type (t_dst_type, t_expr); + if (t_ret) + return t_ret; + enum tree_code dst_code = TREE_CODE (t_dst_type); + switch (dst_code) + { + case INTEGER_TYPE: + case ENUMERAL_TYPE: + t_ret = convert_to_integer (t_dst_type, t_expr); + goto maybe_fold; + + case BOOLEAN_TYPE: + /* Compare with c_objc_common_truthvalue_conversion and + c_common_truthvalue_conversion. */ + /* For now, convert to: (t_expr != 0) */ + t_ret = build2 (NE_EXPR, t_dst_type, + t_expr, integer_zero_node); + goto maybe_fold; + + case REAL_TYPE: + t_ret = convert_to_real (t_dst_type, t_expr); + goto maybe_fold; + + case POINTER_TYPE: + t_ret = build1 (NOP_EXPR, t_dst_type, t_expr); + goto maybe_fold; + + default: + add_error (loc, "couldn't handle cast during playback"); + fprintf (stderr, "input expression:\n"); + debug_tree (t_expr); + fprintf (stderr, "requested type:\n"); + debug_tree (t_dst_type); + return error_mark_node; + + maybe_fold: + if (TREE_CODE (t_ret) != C_MAYBE_CONST_EXPR) + t_ret = fold (t_ret); + return t_ret; + } +} + +/* Construct a playback::rvalue instance (wrapping a tree) for a + cast. */ + +playback::rvalue * +playback::context:: +new_cast (playback::location *loc, + playback::rvalue *expr, + playback::type *type_) +{ + + tree t_cast = build_cast (loc, expr, type_); + if (loc) + set_tree_location (t_cast, loc); + return new rvalue (this, t_cast); +} + +/* Construct a playback::lvalue instance (wrapping a tree) for an + array access. */ + +playback::lvalue * +playback::context:: +new_array_access (location *loc, + rvalue *ptr, + rvalue *index) +{ + gcc_assert (ptr); + gcc_assert (index); + + /* For comparison, see: + c/c-typeck.c: build_array_ref + c-family/c-common.c: pointer_int_sum + */ + tree t_ptr = ptr->as_tree (); + tree t_index = index->as_tree (); + tree t_type_ptr = TREE_TYPE (t_ptr); + tree t_type_star_ptr = TREE_TYPE (t_type_ptr); + + if (TREE_CODE (t_type_ptr) == ARRAY_TYPE) + { + tree t_result = build4 (ARRAY_REF, t_type_star_ptr, t_ptr, t_index, + NULL_TREE, NULL_TREE); + if (loc) + set_tree_location (t_result, loc); + return new lvalue (this, t_result); + } + else + { + /* Convert index to an offset in bytes. */ + tree t_sizeof = size_in_bytes (t_type_star_ptr); + t_index = fold_build1 (CONVERT_EXPR, sizetype, t_index); + tree t_offset = build2 (MULT_EXPR, sizetype, t_index, t_sizeof); + + /* Locate (ptr + offset). */ + tree t_address = build2 (POINTER_PLUS_EXPR, t_type_ptr, t_ptr, t_offset); + + tree t_indirection = build1 (INDIRECT_REF, t_type_star_ptr, t_address); + if (loc) + { + set_tree_location (t_sizeof, loc); + set_tree_location (t_offset, loc); + set_tree_location (t_address, loc); + set_tree_location (t_indirection, loc); + } + + return new lvalue (this, t_indirection); + } +} + +/* Construct a tree for a field access. */ + +tree +playback::context:: +new_field_access (location *loc, + tree datum, + field *field) +{ + gcc_assert (datum); + gcc_assert (field); + + /* Compare with c/c-typeck.c:lookup_field, build_indirect_ref, and + build_component_ref. */ + tree type = TREE_TYPE (datum); + gcc_assert (type); + gcc_assert (TREE_CODE (type) != POINTER_TYPE); + + tree t_field = field->as_tree (); + tree ref = build3 (COMPONENT_REF, TREE_TYPE (t_field), datum, + t_field, NULL_TREE); + if (loc) + set_tree_location (ref, loc); + return ref; +} + +/* Construct a tree for a dereference. */ + +tree +playback::context:: +new_dereference (tree ptr, + location *loc) +{ + gcc_assert (ptr); + + tree type = TREE_TYPE (TREE_TYPE(ptr)); + tree datum = build1 (INDIRECT_REF, type, ptr); + if (loc) + set_tree_location (datum, loc); + return datum; +} + +/* Construct a playback::lvalue instance (wrapping a tree) for a + field access. */ + +playback::lvalue * +playback::lvalue:: +access_field (location *loc, + field *field) +{ + tree datum = as_tree (); + tree ref = get_context ()->new_field_access (loc, datum, field); + if (!ref) + return NULL; + return new lvalue (get_context (), ref); +} + +/* Construct a playback::rvalue instance (wrapping a tree) for a + field access. */ + +playback::rvalue * +playback::rvalue:: +access_field (location *loc, + field *field) +{ + tree datum = as_tree (); + tree ref = get_context ()->new_field_access (loc, datum, field); + if (!ref) + return NULL; + return new rvalue (get_context (), ref); +} + +/* Construct a playback::lvalue instance (wrapping a tree) for a + dereferenced field access. */ + +playback::lvalue * +playback::rvalue:: +dereference_field (location *loc, + field *field) +{ + tree ptr = as_tree (); + tree datum = get_context ()->new_dereference (ptr, loc); + if (!datum) + return NULL; + tree ref = get_context ()->new_field_access (loc, datum, field); + if (!ref) + return NULL; + return new lvalue (get_context (), ref); +} + +/* Construct a playback::lvalue instance (wrapping a tree) for a + dereference. */ + +playback::lvalue * +playback::rvalue:: +dereference (location *loc) +{ + tree ptr = as_tree (); + tree datum = get_context ()->new_dereference (ptr, loc); + return new lvalue (get_context (), datum); +} + +/* Construct a playback::rvalue instance (wrapping a tree) for an + address-lookup. */ + +playback::rvalue * +playback::lvalue:: +get_address (location *loc) +{ + tree t_lvalue = as_tree (); + tree t_thistype = TREE_TYPE (t_lvalue); + tree t_ptrtype = build_pointer_type (t_thistype); + tree ptr = build1 (ADDR_EXPR, t_ptrtype, t_lvalue); + if (loc) + get_context ()->set_tree_location (ptr, loc); + return new rvalue (get_context (), ptr); +} + +/* gcc::jit::playback::wrapper subclasses are GC-managed: + allocate them using ggc_internal_cleared_alloc. */ + +void * +playback::wrapper:: +operator new (size_t sz) +{ + return ggc_internal_cleared_alloc (sz MEM_STAT_INFO); +} + +/* Constructor for gcc:jit::playback::function. */ + +playback::function:: +function (context *ctxt, + tree fndecl, + enum gcc_jit_function_kind kind) +: m_ctxt(ctxt), + m_inner_fndecl (fndecl), + m_inner_bind_expr (NULL), + m_kind (kind) +{ + if (m_kind != GCC_JIT_FUNCTION_IMPORTED) + { + /* Create a BIND_EXPR, and within it, a statement list. */ + m_stmt_list = alloc_stmt_list (); + m_stmt_iter = tsi_start (m_stmt_list); + m_inner_block = make_node (BLOCK); + m_inner_bind_expr = + build3 (BIND_EXPR, void_type_node, NULL, m_stmt_list, m_inner_block); + } + else + { + m_inner_block = NULL; + m_stmt_list = NULL; + } +} + +/* Hand-written GC-marking hook for playback functions. */ + +void +playback::function:: +gt_ggc_mx () +{ + gt_ggc_m_9tree_node (m_inner_fndecl); + gt_ggc_m_9tree_node (m_inner_bind_expr); + gt_ggc_m_9tree_node (m_stmt_list); + gt_ggc_m_9tree_node (m_inner_block); +} + +/* Get the return type of a playback function, in tree form. */ + +tree +playback::function:: +get_return_type_as_tree () const +{ + return TREE_TYPE (TREE_TYPE(m_inner_fndecl)); +} + +/* Construct a new local within this playback::function. */ + +playback::lvalue * +playback::function:: +new_local (location *loc, + type *type, + const char *name) +{ + gcc_assert (type); + gcc_assert (name); + tree inner = build_decl (UNKNOWN_LOCATION, VAR_DECL, + get_identifier (name), + type->as_tree ()); + DECL_CONTEXT (inner) = this->m_inner_fndecl; + + /* Prepend to BIND_EXPR_VARS: */ + DECL_CHAIN (inner) = BIND_EXPR_VARS (m_inner_bind_expr); + BIND_EXPR_VARS (m_inner_bind_expr) = inner; + + if (loc) + set_tree_location (inner, loc); + return new lvalue (m_ctxt, inner); +} + +/* Construct a new block within this playback::function. */ + +playback::block * +playback::function:: +new_block (const char *name) +{ + gcc_assert (m_kind != GCC_JIT_FUNCTION_IMPORTED); + + block *result = new playback::block (this, name); + m_blocks.safe_push (result); + return result; +} + +/* Build a statement list for the function as a whole out of the + lists of statements for the individual blocks, building labels + for each block. */ + +void +playback::function:: +build_stmt_list () +{ + int i; + block *b; + + FOR_EACH_VEC_ELT (m_blocks, i, b) + { + int j; + tree stmt; + + b->m_label_expr = build1 (LABEL_EXPR, + void_type_node, + b->as_label_decl ()); + tsi_link_after (&m_stmt_iter, b->m_label_expr, TSI_CONTINUE_LINKING); + + FOR_EACH_VEC_ELT (b->m_stmts, j, stmt) + tsi_link_after (&m_stmt_iter, stmt, TSI_CONTINUE_LINKING); + } +} + +/* Finish compiling the given function, potentially running the + garbage-collector. + The function will have a statement list by now. + Amongst other things, this gimplifies the statement list, + and calls cgraph_node::finalize_function on the function. */ + +void +playback::function:: +postprocess () +{ + if (m_ctxt->get_bool_option (GCC_JIT_BOOL_OPTION_DUMP_INITIAL_TREE)) + debug_tree (m_stmt_list); + + /* Do we need this to force cgraphunit.c to output the function? */ + if (m_kind == GCC_JIT_FUNCTION_EXPORTED) + { + DECL_EXTERNAL (m_inner_fndecl) = 0; + DECL_PRESERVE_P (m_inner_fndecl) = 1; + } + + if (m_kind == GCC_JIT_FUNCTION_INTERNAL + ||m_kind == GCC_JIT_FUNCTION_ALWAYS_INLINE) + { + DECL_EXTERNAL (m_inner_fndecl) = 0; + TREE_PUBLIC (m_inner_fndecl) = 0; + } + + if (m_kind != GCC_JIT_FUNCTION_IMPORTED) + { + /* Seem to need this in gimple-low.c: */ + gcc_assert (m_inner_block); + DECL_INITIAL (m_inner_fndecl) = m_inner_block; + + /* how to add to function? the following appears to be how to + set the body of a m_inner_fndecl: */ + DECL_SAVED_TREE(m_inner_fndecl) = m_inner_bind_expr; + + /* Ensure that locals appear in the debuginfo. */ + BLOCK_VARS (m_inner_block) = BIND_EXPR_VARS (m_inner_bind_expr); + + //debug_tree (m_inner_fndecl); + + /* Convert to gimple: */ + //printf("about to gimplify_function_tree\n"); + gimplify_function_tree (m_inner_fndecl); + //printf("finished gimplify_function_tree\n"); + + current_function_decl = m_inner_fndecl; + if (m_ctxt->get_bool_option (GCC_JIT_BOOL_OPTION_DUMP_INITIAL_GIMPLE)) + dump_function_to_file (m_inner_fndecl, stderr, TDF_VOPS|TDF_MEMSYMS|TDF_LINENO); + //debug_tree (m_inner_fndecl); + + //printf("about to add to cgraph\n"); + /* Add to cgraph: */ + cgraph_node::finalize_function (m_inner_fndecl, false); + /* This can trigger a collection, so we need to have all of + the funcs as roots. */ + + current_function_decl = NULL; + } +} + +/* Add an eval of the rvalue to the function's statement list. */ + +void +playback::block:: +add_eval (location *loc, + rvalue *rvalue) +{ + gcc_assert (rvalue); + + if (loc) + set_tree_location (rvalue->as_tree (), loc); + + add_stmt (rvalue->as_tree ()); +} + +/* Add an assignment to the function's statement list. */ + +void +playback::block:: +add_assignment (location *loc, + lvalue *lvalue, + rvalue *rvalue) +{ + gcc_assert (lvalue); + gcc_assert (rvalue); + + tree t_lvalue = lvalue->as_tree (); + tree t_rvalue = rvalue->as_tree (); + if (TREE_TYPE (t_rvalue) != TREE_TYPE (t_lvalue)) + { + t_rvalue = build1 (CONVERT_EXPR, + TREE_TYPE (t_lvalue), + t_rvalue); + if (loc) + set_tree_location (t_rvalue, loc); + } + + tree stmt = + build2 (MODIFY_EXPR, TREE_TYPE (t_lvalue), + t_lvalue, t_rvalue); + if (loc) + set_tree_location (stmt, loc); + add_stmt (stmt); +} + +/* Add a comment to the function's statement list. + For now this is done by adding a dummy label. */ + +void +playback::block:: +add_comment (location *loc, + const char *text) +{ + /* Wrap the text in C-style comment delimiters. */ + size_t sz = + (3 /* opening delim */ + + strlen (text) + + 3 /* closing delim */ + + 1 /* terminator */); + char *wrapped = (char *)ggc_internal_alloc (sz); + snprintf (wrapped, sz, "/* %s */", text); + + /* For now we simply implement this by adding a dummy label with a name + containing the given text. */ + tree identifier = get_identifier (wrapped); + tree label_decl = build_decl (UNKNOWN_LOCATION, LABEL_DECL, + identifier, void_type_node); + DECL_CONTEXT (label_decl) = m_func->as_fndecl (); + + tree label_expr = build1 (LABEL_EXPR, void_type_node, label_decl); + if (loc) + set_tree_location (label_expr, loc); + add_stmt (label_expr); +} + +/* Add a conditional jump statement to the function's statement list. */ + +void +playback::block:: +add_conditional (location *loc, + rvalue *boolval, + block *on_true, + block *on_false) +{ + gcc_assert (boolval); + gcc_assert (on_true); + gcc_assert (on_false); + + /* COND_EXPR wants statement lists for the true/false operands, but we + want labels. + Shim it by creating jumps to the labels */ + tree true_jump = build1 (GOTO_EXPR, void_type_node, + on_true->as_label_decl ()); + if (loc) + set_tree_location (true_jump, loc); + + tree false_jump = build1 (GOTO_EXPR, void_type_node, + on_false->as_label_decl ()); + if (loc) + set_tree_location (false_jump, loc); + + tree stmt = + build3 (COND_EXPR, void_type_node, boolval->as_tree (), + true_jump, false_jump); + if (loc) + set_tree_location (stmt, loc); + add_stmt (stmt); +} + +/* Add an unconditional jump statement to the function's statement list. */ + +void +playback::block:: +add_jump (location *loc, + block *target) +{ + gcc_assert (target); + + // see c_finish_loop + //tree top = build1 (LABEL_EXPR, void_type_node, NULL_TREE); + //add_stmt (top); + + //tree stmt = build_and_jump (&LABEL_EXPR_LABEL (target->label_)); + TREE_USED (target->as_label_decl ()) = 1; + tree stmt = build1 (GOTO_EXPR, void_type_node, target->as_label_decl ()); + if (loc) + set_tree_location (stmt, loc); + add_stmt (stmt); + + /* + from c-typeck.c: +tree +c_finish_goto_label (location_t loc, tree label) +{ + tree decl = lookup_label_for_goto (loc, label); + if (!decl) + return NULL_TREE; + TREE_USED (decl) = 1; + { + tree t = build1 (GOTO_EXPR, void_type_node, decl); + SET_EXPR_LOCATION (t, loc); + return add_stmt (t); + } +} + */ + +} + +/* Add a return statement to the function's statement list. */ + +void +playback::block:: +add_return (location *loc, + rvalue *rvalue) +{ + tree modify_retval = NULL; + tree return_type = m_func->get_return_type_as_tree (); + if (rvalue) + { + tree t_lvalue = DECL_RESULT (m_func->as_fndecl ()); + tree t_rvalue = rvalue->as_tree (); + if (TREE_TYPE (t_rvalue) != TREE_TYPE (t_lvalue)) + t_rvalue = build1 (CONVERT_EXPR, + TREE_TYPE (t_lvalue), + t_rvalue); + modify_retval = build2 (MODIFY_EXPR, return_type, + t_lvalue, t_rvalue); + if (loc) + set_tree_location (modify_retval, loc); + } + tree return_stmt = build1 (RETURN_EXPR, return_type, + modify_retval); + if (loc) + set_tree_location (return_stmt, loc); + + add_stmt (return_stmt); +} + +/* Constructor for gcc::jit::playback::block. */ + +playback::block:: +block (function *func, + const char *name) +: m_func (func), + m_stmts () +{ + tree identifier; + + gcc_assert (func); + // name can be NULL + if (name) + identifier = get_identifier (name); + else + identifier = NULL; + m_label_decl = build_decl (UNKNOWN_LOCATION, LABEL_DECL, + identifier, void_type_node); + DECL_CONTEXT (m_label_decl) = func->as_fndecl (); + m_label_expr = NULL; +} + +/* Construct a tempdir path template suitable for use by mkdtemp + e.g. "/tmp/libgccjit-XXXXXX", but respecting the rules in + libiberty's choose_tempdir rather than hardcoding "/tmp/". + + The memory is allocated using malloc and must be freed. + Aborts the process if allocation fails. */ + +static char * +make_tempdir_path_template () +{ + const char *tmpdir_buf; + size_t tmpdir_len; + const char *file_template_buf; + size_t file_template_len; + char *result; + + /* The result of choose_tmpdir is a cached buffer within libiberty, so + we must *not* free it. */ + tmpdir_buf = choose_tmpdir (); + + /* choose_tmpdir aborts on malloc failure. */ + gcc_assert (tmpdir_buf); + + tmpdir_len = strlen (tmpdir_buf); + /* tmpdir_buf should now have a dir separator as the final byte. */ + gcc_assert (tmpdir_len > 0); + gcc_assert (tmpdir_buf[tmpdir_len - 1] == DIR_SEPARATOR); + + file_template_buf = "libgccjit-XXXXXX"; + file_template_len = strlen (file_template_buf); + + result = XNEWVEC (char, tmpdir_len + file_template_len + 1); + strcpy (result, tmpdir_buf); + strcpy (result + tmpdir_len, file_template_buf); + + return result; +} + +/* Compile a playback::context: + + - Use the context's options to cconstruct command-line options, and + call into the rest of GCC (toplev::main). + - Assuming it succeeds, we have a .s file; we want a .so file. + Invoke another gcc to convert the .s file to a .so file. + - dlopen the .so file + - Wrap the result up as a playback::result and return it. */ + +result * +playback::context:: +compile () +{ + void *handle = NULL; + const char *ctxt_progname; + result *result_obj = NULL; + const char *fake_args[20]; + unsigned int num_args; + + m_path_template = make_tempdir_path_template (); + if (!m_path_template) + return NULL; + + /* Create tempdir using mkdtemp. This is created with 0700 perms and + is unique. Hence no other (non-root) users should have access to + the paths within it. */ + m_path_tempdir = mkdtemp (m_path_template); + if (!m_path_tempdir) + return NULL; + m_path_c_file = concat (m_path_tempdir, "/fake.c", NULL); + m_path_s_file = concat (m_path_tempdir, "/fake.s", NULL); + m_path_so_file = concat (m_path_tempdir, "/fake.so", NULL); + + /* Call into the rest of gcc. + For now, we have to assemble command-line options to pass into + toplev::main, so that they can be parsed. */ + + /* Pass in user-provided program name as argv0, if any, so that it + makes it into GCC's "progname" global, used in various diagnostics. */ + ctxt_progname = get_str_option (GCC_JIT_STR_OPTION_PROGNAME); + fake_args[0] = + (ctxt_progname ? ctxt_progname : "libgccjit.so"); + + fake_args[1] = m_path_c_file; + num_args = 2; + +#define ADD_ARG(arg) \ + do \ + { \ + gcc_assert(num_args < sizeof(fake_args)/sizeof(char*)); \ + fake_args[num_args++] = arg; \ + } \ + while (0) + + ADD_ARG ("-fPIC"); + + /* Handle int options: */ + switch (get_int_option (GCC_JIT_INT_OPTION_OPTIMIZATION_LEVEL)) + { + default: + add_error (NULL, + "unrecognized optimization level: %i", + get_int_option (GCC_JIT_INT_OPTION_OPTIMIZATION_LEVEL)); + return NULL; + + case 0: + ADD_ARG ("-O0"); + break; + + case 1: + ADD_ARG ("-O1"); + break; + + case 2: + ADD_ARG ("-O2"); + break; + + case 3: + ADD_ARG ("-O3"); + break; + } + /* What about -Os? */ + + /* Handle bool options: */ + if (get_bool_option (GCC_JIT_BOOL_OPTION_DEBUGINFO)) + ADD_ARG ("-g"); + + /* Suppress timing (and other) info. */ + if (!get_bool_option (GCC_JIT_BOOL_OPTION_DUMP_SUMMARY)) + { + ADD_ARG ("-quiet"); + quiet_flag = 1; + } + + /* Aggressively garbage-collect, to shake out bugs: */ + if (get_bool_option (GCC_JIT_BOOL_OPTION_SELFCHECK_GC)) + { + ADD_ARG ("--param"); + ADD_ARG ("ggc-min-expand=0"); + ADD_ARG ("--param"); + ADD_ARG ("ggc-min-heapsize=0"); + } + + if (get_bool_option (GCC_JIT_BOOL_OPTION_DUMP_EVERYTHING)) + { + ADD_ARG ("-fdump-tree-all"); + ADD_ARG ("-fdump-rtl-all"); + ADD_ARG ("-fdump-ipa-all"); + } + + toplev toplev (false); + + toplev.main (num_args, const_cast <char **> (fake_args)); + toplev.finalize (); + + active_playback_ctxt = NULL; + + if (errors_occurred ()) + return NULL; + + if (get_bool_option (GCC_JIT_BOOL_OPTION_DUMP_GENERATED_CODE)) + dump_generated_code (); + + /* Gross hacks follow: + We have a .s file; we want a .so file. + We could reuse parts of gcc/gcc.c to do this. + For now, just use the driver binary from the install, as + named in gcc-driver-name.h + e.g. "x86_64-unknown-linux-gnu-gcc-5.0.0". + */ + { + auto_timevar assemble_timevar (TV_ASSEMBLE); + const char *errmsg; + const char *argv[7]; + int exit_status = 0; + int err = 0; + const char *gcc_driver_name = GCC_DRIVER_NAME; + + argv[0] = gcc_driver_name; + argv[1] = "-shared"; + /* The input: assembler. */ + argv[2] = m_path_s_file; + /* The output: shared library. */ + argv[3] = "-o"; + argv[4] = m_path_so_file; + + /* Don't use the linker plugin. + If running with just a "make" and not a "make install", then we'd + run into + "fatal error: -fuse-linker-plugin, but liblto_plugin.so not found" + libto_plugin is a .la at build time, with it becoming installed with + ".so" suffix: i.e. it doesn't exist with a .so suffix until install + time. */ + argv[5] = "-fno-use-linker-plugin"; + + /* pex argv arrays are NULL-terminated. */ + argv[6] = NULL; + + errmsg = pex_one (PEX_SEARCH, /* int flags, */ + gcc_driver_name, + const_cast<char * const *> (argv), + ctxt_progname, /* const char *pname */ + NULL, /* const char *outname */ + NULL, /* const char *errname */ + &exit_status, /* int *status */ + &err); /* int *err*/ + if (errmsg) + { + add_error (NULL, "error invoking gcc driver: %s", errmsg); + return NULL; + } + + /* pex_one can return a NULL errmsg when the executable wasn't + found (or doesn't exist), so trap these cases also. */ + if (exit_status || err) + { + add_error (NULL, + "error invoking gcc driver: exit_status: %i err: %i", + exit_status, err); + add_error (NULL, + "whilst attempting to run a driver named: %s", + gcc_driver_name); + add_error (NULL, + "PATH was: %s", + getenv ("PATH")); + return NULL; + } + } + + // TODO: split out assembles vs linker + + /* dlopen the .so file. */ + { + auto_timevar load_timevar (TV_LOAD); + + const char *error; + + /* Clear any existing error. */ + dlerror (); + + handle = dlopen (m_path_so_file, RTLD_NOW | RTLD_LOCAL); + if ((error = dlerror()) != NULL) { + add_error (NULL, "%s", error); + } + if (handle) + result_obj = new result (handle); + else + result_obj = NULL; + } + + return result_obj; +} + +/* Top-level hook for playing back a recording context. + + This plays back m_recording_ctxt, and, if no errors + occurred builds statement lists for and then postprocesses + every function in the result. */ + +void +playback::context:: +replay () +{ + /* Adapted from c-common.c:c_common_nodes_and_builtins. */ + tree array_domain_type = build_index_type (size_int (200)); + m_char_array_type_node + = build_array_type (char_type_node, array_domain_type); + + m_const_char_ptr + = build_pointer_type (build_qualified_type (char_type_node, + TYPE_QUAL_CONST)); + + /* Replay the recorded events: */ + timevar_push (TV_JIT_REPLAY); + + m_recording_ctxt->replay_into (this); + + /* Clean away the temporary references from recording objects + to playback objects. We have to do this now since the + latter are GC-allocated, but the former don't mark these + refs. Hence we must stop using them before the GC can run. */ + m_recording_ctxt->disassociate_from_playback (); + + timevar_pop (TV_JIT_REPLAY); + + if (!errors_occurred ()) + { + int i; + function *func; + + /* No GC can happen yet; process the cached source locations. */ + handle_locations (); + + /* We've now created tree nodes for the stmts in the various blocks + in each function, but we haven't built each function's single stmt + list yet. Do so now. */ + FOR_EACH_VEC_ELT (m_functions, i, func) + func->build_stmt_list (); + + /* No GC can have happened yet. */ + + /* Postprocess the functions. This could trigger GC. */ + FOR_EACH_VEC_ELT (m_functions, i, func) + { + gcc_assert (func); + func->postprocess (); + } + } +} + +/* Dump the generated .s file to stderr. */ + +void +playback::context:: +dump_generated_code () +{ + char buf[4096]; + size_t sz; + FILE *f_in = fopen (m_path_s_file, "r"); + if (!f_in) + return; + + while ( (sz = fread (buf, 1, sizeof (buf), f_in)) ) + fwrite (buf, 1, sz, stderr); + + fclose (f_in); +} + +/* qsort comparator for comparing pairs of playback::source_line *, + ordering them by line number. */ + +static int +line_comparator (const void *lhs, const void *rhs) +{ + const playback::source_line *line_lhs = \ + *static_cast<const playback::source_line * const*> (lhs); + const playback::source_line *line_rhs = \ + *static_cast<const playback::source_line * const*> (rhs); + return line_lhs->get_line_num () - line_rhs->get_line_num (); +} + +/* qsort comparator for comparing pairs of playback::location *, + ordering them by column number. */ + +static int +location_comparator (const void *lhs, const void *rhs) +{ + const playback::location *loc_lhs = \ + *static_cast<const playback::location * const *> (lhs); + const playback::location *loc_rhs = \ + *static_cast<const playback::location * const *> (rhs); + return loc_lhs->get_column_num () - loc_rhs->get_column_num (); +} + +/* Our API allows locations to be created in arbitrary orders, but the + linemap API requires locations to be created in ascending order + as if we were tokenizing files. + + This hook sorts all of the the locations that have been created, and + calls into the linemap API, creating linemap entries in sorted order + for our locations. */ + +void +playback::context:: +handle_locations () +{ + /* Create the source code locations, following the ordering rules + imposed by the linemap API. + + line_table is a global. */ + int i; + source_file *file; + + FOR_EACH_VEC_ELT (m_source_files, i, file) + { + linemap_add (line_table, LC_ENTER, false, file->get_filename (), 0); + + /* Sort lines by ascending line numbers. */ + file->m_source_lines.qsort (&line_comparator); + + int j; + source_line *line; + FOR_EACH_VEC_ELT (file->m_source_lines, j, line) + { + int k; + location *loc; + + /* Sort locations in line by ascending column numbers. */ + line->m_locations.qsort (&location_comparator); + + /* Determine maximum column within this line. */ + gcc_assert (line->m_locations.length () > 0); + location *final_column = + line->m_locations[line->m_locations.length () - 1]; + int max_col = final_column->get_column_num (); + + linemap_line_start (line_table, line->get_line_num (), max_col); + FOR_EACH_VEC_ELT (line->m_locations, k, loc) + { + loc->m_srcloc = \ + linemap_position_for_column (line_table, loc->get_column_num ()); + } + } + + linemap_add (line_table, LC_LEAVE, false, NULL, 0); + } + + /* line_table should now be populated; every playback::location should + now have an m_srcloc. */ + + /* Now assign them to tree nodes as appropriate. */ + std::pair<tree, location *> *cached_location; + + FOR_EACH_VEC_ELT (m_cached_locations, i, cached_location) + { + tree t = cached_location->first; + source_location srcloc = cached_location->second->m_srcloc; + + /* This covers expressions: */ + if (CAN_HAVE_LOCATION_P (t)) + SET_EXPR_LOCATION (t, srcloc); + else if (CODE_CONTAINS_STRUCT(TREE_CODE(t), TS_DECL_MINIMAL)) + DECL_SOURCE_LOCATION (t) = srcloc; + else + { + /* Don't know how to set location on this node. */ + } + } +} + +/* We handle errors on a playback::context by adding them to the + corresponding recording::context. */ + +void +playback::context:: +add_error (location *loc, const char *fmt, ...) +{ + va_list ap; + va_start (ap, fmt); + m_recording_ctxt->add_error_va (loc ? loc->get_recording_loc () : NULL, + fmt, ap); + va_end (ap); +} + +/* We handle errors on a playback::context by adding them to the + corresponding recording::context. */ + +void +playback::context:: +add_error_va (location *loc, const char *fmt, va_list ap) +{ + m_recording_ctxt->add_error_va (loc ? loc->get_recording_loc () : NULL, + fmt, ap); +} + +/* Constructor for gcc::jit::playback::result. */ + +result:: +result(void *dso_handle) + : m_dso_handle(dso_handle) +{ +} + +/* gcc::jit::playback::result's destructor. + + Called implicitly by gcc_jit_result_release. */ + +result::~result() +{ + dlclose (m_dso_handle); +} + +/* Attempt to locate the given function by name within the + playback::result, using dlsym. + + Implements the post-error-checking part of + gcc_jit_result_get_code. */ + +void * +result:: +get_code (const char *funcname) +{ + void *code; + const char *error; + + /* Clear any existing error. */ + dlerror (); + + code = dlsym (m_dso_handle, funcname); + + if ((error = dlerror()) != NULL) { + fprintf(stderr, "%s\n", error); + } + + return code; +} + +/* Dealing with the linemap API. */ + +/* Construct a playback::location for a recording::location, if it + doesn't exist already. */ + +playback::location * +playback::context:: +new_location (recording::location *rloc, + const char *filename, + int line, + int column) +{ + /* Get the source_file for filename, creating if necessary. */ + source_file *src_file = get_source_file (filename); + /* Likewise for the line within the file. */ + source_line *src_line = src_file->get_source_line (line); + /* Likewise for the column within the line. */ + location *loc = src_line->get_location (rloc, column); + return loc; +} + +/* Deferred setting of the location for a given tree, by adding the + (tree, playback::location) pair to a list of deferred associations. + We will actually set the location on the tree later on once + the source_location for the playback::location exists. */ + +void +playback::context:: +set_tree_location (tree t, location *loc) +{ + gcc_assert (loc); + m_cached_locations.safe_push (std::make_pair (t, loc)); +} + + +/* Construct a playback::source_file for the given source + filename, if it doesn't exist already. */ + +playback::source_file * +playback::context:: +get_source_file (const char *filename) +{ + /* Locate the file. + For simplicitly, this is currently a linear search. + Replace with a hash if this shows up in the profile. */ + int i; + source_file *file; + tree ident_filename = get_identifier (filename); + + FOR_EACH_VEC_ELT (m_source_files, i, file) + if (file->filename_as_tree () == ident_filename) + return file; + + /* Not found. */ + file = new source_file (ident_filename); + m_source_files.safe_push (file); + return file; +} + +/* Constructor for gcc::jit::playback::source_file. */ + +playback::source_file::source_file (tree filename) : + m_source_lines (), + m_filename (filename) +{ +} + +/* Construct a playback::source_line for the given line + within this source file, if one doesn't exist already. */ + +playback::source_line * +playback::source_file:: +get_source_line (int line_num) +{ + /* Locate the line. + For simplicitly, this is currently a linear search. + Replace with a hash if this shows up in the profile. */ + int i; + source_line *line; + + FOR_EACH_VEC_ELT (m_source_lines, i, line) + if (line->get_line_num () == line_num) + return line; + + /* Not found. */ + line = new source_line (this, line_num); + m_source_lines.safe_push (line); + return line; +} + +/* Constructor for gcc::jit::playback::source_line. */ + +playback::source_line::source_line (source_file *file, int line_num) : + m_locations (), + m_source_file (file), + m_line_num (line_num) +{ +} + +/* Construct a playback::location for the given column + within this line of a specific source file, if one doesn't exist + already. */ + +playback::location * +playback::source_line:: +get_location (recording::location *rloc, int column_num) +{ + int i; + location *loc; + + /* Another linear search that probably should be a hash table. */ + FOR_EACH_VEC_ELT (m_locations, i, loc) + if (loc->get_column_num () == column_num) + return loc; + + /* Not found. */ + loc = new location (rloc, this, column_num); + m_locations.safe_push (loc); + return loc; +} + +/* Constructor for gcc::jit::playback::location. */ + +playback::location::location (recording::location *loc, + source_line *line, + int column_num) : + m_srcloc (UNKNOWN_LOCATION), + m_recording_loc (loc), + m_line (line), + m_column_num(column_num) +{ +} + +/* The active gcc::jit::playback::context instance. This is a singleton, + guarded by jit_mutex. */ + +playback::context *active_playback_ctxt; + +} // namespace gcc::jit + +} // namespace gcc |