X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Ftree.c;h=7c5f154ad389a42a20a0a6b1a47544c0a8134d70;hb=b20cb873ccf058adcb0687cfac98445ee8132ab6;hp=cdecd707f0067cbc65f830fcb500e9ad33481abe;hpb=75a70cf95f65fe9204b15ad9aba31c571381d224;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/tree.c b/gcc/tree.c index cdecd707f00..7c5f154ad38 100644 --- a/gcc/tree.c +++ b/gcc/tree.c @@ -1,6 +1,6 @@ /* Language-independent node constructors for parse phase of GNU compiler. Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, - 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 + 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. This file is part of GCC. @@ -45,6 +45,7 @@ along with GCC; see the file COPYING3. If not see #include "output.h" #include "target.h" #include "langhooks.h" +#include "tree-inline.h" #include "tree-iterator.h" #include "basic-block.h" #include "tree-flow.h" @@ -148,8 +149,7 @@ static GTY(()) int next_type_uid = 1; /* Since we cannot rehash a type after it is in the table, we have to keep the hash code. */ -struct type_hash GTY(()) -{ +struct GTY(()) type_hash { unsigned long hash; tree type; }; @@ -195,9 +195,6 @@ static GTY ((if_marked ("tree_priority_map_marked_p"), param_is (struct tree_priority_map))) htab_t init_priority_for_decl; -static GTY ((if_marked ("tree_map_marked_p"), param_is (struct tree_map))) - htab_t restrict_base_for_decl; - static void set_type_quals (tree, int); static int type_hash_eq (const void *, const void *); static hashval_t type_hash_hash (const void *); @@ -257,7 +254,263 @@ const char * const omp_clause_code_name[] = "collapse", "untied" }; - + + +/* Return the tree node structure used by tree code CODE. */ + +static inline enum tree_node_structure_enum +tree_node_structure_for_code (enum tree_code code) +{ + switch (TREE_CODE_CLASS (code)) + { + case tcc_declaration: + { + switch (code) + { + case FIELD_DECL: + return TS_FIELD_DECL; + case PARM_DECL: + return TS_PARM_DECL; + case VAR_DECL: + return TS_VAR_DECL; + case LABEL_DECL: + return TS_LABEL_DECL; + case RESULT_DECL: + return TS_RESULT_DECL; + case CONST_DECL: + return TS_CONST_DECL; + case TYPE_DECL: + return TS_TYPE_DECL; + case FUNCTION_DECL: + return TS_FUNCTION_DECL; + default: + return TS_DECL_NON_COMMON; + } + } + case tcc_type: + return TS_TYPE; + case tcc_reference: + case tcc_comparison: + case tcc_unary: + case tcc_binary: + case tcc_expression: + case tcc_statement: + case tcc_vl_exp: + return TS_EXP; + default: /* tcc_constant and tcc_exceptional */ + break; + } + switch (code) + { + /* tcc_constant cases. */ + case INTEGER_CST: return TS_INT_CST; + case REAL_CST: return TS_REAL_CST; + case FIXED_CST: return TS_FIXED_CST; + case COMPLEX_CST: return TS_COMPLEX; + case VECTOR_CST: return TS_VECTOR; + case STRING_CST: return TS_STRING; + /* tcc_exceptional cases. */ + case ERROR_MARK: return TS_COMMON; + case IDENTIFIER_NODE: return TS_IDENTIFIER; + case TREE_LIST: return TS_LIST; + case TREE_VEC: return TS_VEC; + case SSA_NAME: return TS_SSA_NAME; + case PLACEHOLDER_EXPR: return TS_COMMON; + case STATEMENT_LIST: return TS_STATEMENT_LIST; + case BLOCK: return TS_BLOCK; + case CONSTRUCTOR: return TS_CONSTRUCTOR; + case TREE_BINFO: return TS_BINFO; + case OMP_CLAUSE: return TS_OMP_CLAUSE; + case OPTIMIZATION_NODE: return TS_OPTIMIZATION; + case TARGET_OPTION_NODE: return TS_TARGET_OPTION; + + default: + gcc_unreachable (); + } +} + + +/* Initialize tree_contains_struct to describe the hierarchy of tree + nodes. */ + +static void +initialize_tree_contains_struct (void) +{ + unsigned i; + +#define MARK_TS_BASE(C) \ + do { \ + tree_contains_struct[C][TS_BASE] = 1; \ + } while (0) + +#define MARK_TS_COMMON(C) \ + do { \ + MARK_TS_BASE (C); \ + tree_contains_struct[C][TS_COMMON] = 1; \ + } while (0) + +#define MARK_TS_DECL_MINIMAL(C) \ + do { \ + MARK_TS_COMMON (C); \ + tree_contains_struct[C][TS_DECL_MINIMAL] = 1; \ + } while (0) + +#define MARK_TS_DECL_COMMON(C) \ + do { \ + MARK_TS_DECL_MINIMAL (C); \ + tree_contains_struct[C][TS_DECL_COMMON] = 1; \ + } while (0) + +#define MARK_TS_DECL_WRTL(C) \ + do { \ + MARK_TS_DECL_COMMON (C); \ + tree_contains_struct[C][TS_DECL_WRTL] = 1; \ + } while (0) + +#define MARK_TS_DECL_WITH_VIS(C) \ + do { \ + MARK_TS_DECL_WRTL (C); \ + tree_contains_struct[C][TS_DECL_WITH_VIS] = 1; \ + } while (0) + +#define MARK_TS_DECL_NON_COMMON(C) \ + do { \ + MARK_TS_DECL_WITH_VIS (C); \ + tree_contains_struct[C][TS_DECL_NON_COMMON] = 1; \ + } while (0) + + for (i = ERROR_MARK; i < LAST_AND_UNUSED_TREE_CODE; i++) + { + enum tree_code code; + enum tree_node_structure_enum ts_code; + + code = (enum tree_code) i; + ts_code = tree_node_structure_for_code (code); + + /* Mark the TS structure itself. */ + tree_contains_struct[code][ts_code] = 1; + + /* Mark all the structures that TS is derived from. */ + switch (ts_code) + { + case TS_COMMON: + MARK_TS_BASE (code); + break; + + case TS_INT_CST: + case TS_REAL_CST: + case TS_FIXED_CST: + case TS_VECTOR: + case TS_STRING: + case TS_COMPLEX: + case TS_IDENTIFIER: + case TS_DECL_MINIMAL: + case TS_TYPE: + case TS_LIST: + case TS_VEC: + case TS_EXP: + case TS_SSA_NAME: + case TS_BLOCK: + case TS_BINFO: + case TS_STATEMENT_LIST: + case TS_CONSTRUCTOR: + case TS_OMP_CLAUSE: + case TS_OPTIMIZATION: + case TS_TARGET_OPTION: + MARK_TS_COMMON (code); + break; + + case TS_DECL_COMMON: + MARK_TS_DECL_MINIMAL (code); + break; + + case TS_DECL_WRTL: + MARK_TS_DECL_COMMON (code); + break; + + case TS_DECL_NON_COMMON: + MARK_TS_DECL_WITH_VIS (code); + break; + + case TS_DECL_WITH_VIS: + case TS_PARM_DECL: + case TS_LABEL_DECL: + case TS_RESULT_DECL: + case TS_CONST_DECL: + MARK_TS_DECL_WRTL (code); + break; + + case TS_FIELD_DECL: + MARK_TS_DECL_COMMON (code); + break; + + case TS_VAR_DECL: + MARK_TS_DECL_WITH_VIS (code); + break; + + case TS_TYPE_DECL: + case TS_FUNCTION_DECL: + MARK_TS_DECL_NON_COMMON (code); + break; + + default: + gcc_unreachable (); + } + } + + /* Basic consistency checks for attributes used in fold. */ + gcc_assert (tree_contains_struct[FUNCTION_DECL][TS_DECL_NON_COMMON]); + gcc_assert (tree_contains_struct[TRANSLATION_UNIT_DECL][TS_DECL_NON_COMMON]); + gcc_assert (tree_contains_struct[TYPE_DECL][TS_DECL_NON_COMMON]); + gcc_assert (tree_contains_struct[CONST_DECL][TS_DECL_COMMON]); + gcc_assert (tree_contains_struct[VAR_DECL][TS_DECL_COMMON]); + gcc_assert (tree_contains_struct[PARM_DECL][TS_DECL_COMMON]); + gcc_assert (tree_contains_struct[RESULT_DECL][TS_DECL_COMMON]); + gcc_assert (tree_contains_struct[FUNCTION_DECL][TS_DECL_COMMON]); + gcc_assert (tree_contains_struct[TYPE_DECL][TS_DECL_COMMON]); + gcc_assert (tree_contains_struct[TRANSLATION_UNIT_DECL][TS_DECL_COMMON]); + gcc_assert (tree_contains_struct[LABEL_DECL][TS_DECL_COMMON]); + gcc_assert (tree_contains_struct[FIELD_DECL][TS_DECL_COMMON]); + gcc_assert (tree_contains_struct[CONST_DECL][TS_DECL_WRTL]); + gcc_assert (tree_contains_struct[VAR_DECL][TS_DECL_WRTL]); + gcc_assert (tree_contains_struct[PARM_DECL][TS_DECL_WRTL]); + gcc_assert (tree_contains_struct[RESULT_DECL][TS_DECL_WRTL]); + gcc_assert (tree_contains_struct[FUNCTION_DECL][TS_DECL_WRTL]); + gcc_assert (tree_contains_struct[LABEL_DECL][TS_DECL_WRTL]); + gcc_assert (tree_contains_struct[CONST_DECL][TS_DECL_MINIMAL]); + gcc_assert (tree_contains_struct[VAR_DECL][TS_DECL_MINIMAL]); + gcc_assert (tree_contains_struct[PARM_DECL][TS_DECL_MINIMAL]); + gcc_assert (tree_contains_struct[RESULT_DECL][TS_DECL_MINIMAL]); + gcc_assert (tree_contains_struct[FUNCTION_DECL][TS_DECL_MINIMAL]); + gcc_assert (tree_contains_struct[TYPE_DECL][TS_DECL_MINIMAL]); + gcc_assert (tree_contains_struct[TRANSLATION_UNIT_DECL][TS_DECL_MINIMAL]); + gcc_assert (tree_contains_struct[LABEL_DECL][TS_DECL_MINIMAL]); + gcc_assert (tree_contains_struct[FIELD_DECL][TS_DECL_MINIMAL]); + gcc_assert (tree_contains_struct[VAR_DECL][TS_DECL_WITH_VIS]); + gcc_assert (tree_contains_struct[FUNCTION_DECL][TS_DECL_WITH_VIS]); + gcc_assert (tree_contains_struct[TYPE_DECL][TS_DECL_WITH_VIS]); + gcc_assert (tree_contains_struct[TRANSLATION_UNIT_DECL][TS_DECL_WITH_VIS]); + gcc_assert (tree_contains_struct[VAR_DECL][TS_VAR_DECL]); + gcc_assert (tree_contains_struct[FIELD_DECL][TS_FIELD_DECL]); + gcc_assert (tree_contains_struct[PARM_DECL][TS_PARM_DECL]); + gcc_assert (tree_contains_struct[LABEL_DECL][TS_LABEL_DECL]); + gcc_assert (tree_contains_struct[RESULT_DECL][TS_RESULT_DECL]); + gcc_assert (tree_contains_struct[CONST_DECL][TS_CONST_DECL]); + gcc_assert (tree_contains_struct[TYPE_DECL][TS_TYPE_DECL]); + gcc_assert (tree_contains_struct[FUNCTION_DECL][TS_FUNCTION_DECL]); + gcc_assert (tree_contains_struct[IMPORTED_DECL][TS_DECL_MINIMAL]); + gcc_assert (tree_contains_struct[IMPORTED_DECL][TS_DECL_COMMON]); + +#undef MARK_TS_BASE +#undef MARK_TS_COMMON +#undef MARK_TS_DECL_MINIMAL +#undef MARK_TS_DECL_COMMON +#undef MARK_TS_DECL_WRTL +#undef MARK_TS_DECL_WITH_VIS +#undef MARK_TS_DECL_NON_COMMON +} + + /* Init tree.c. */ void @@ -274,8 +527,6 @@ init_ttree (void) tree_map_eq, 0); init_priority_for_decl = htab_create_ggc (512, tree_priority_map_hash, tree_priority_map_eq, 0); - restrict_base_for_decl = htab_create_ggc (256, tree_map_hash, - tree_map_eq, 0); int_cst_hash_table = htab_create_ggc (1024, int_cst_hash_hash, int_cst_hash_eq, NULL); @@ -288,62 +539,8 @@ init_ttree (void) cl_optimization_node = make_node (OPTIMIZATION_NODE); cl_target_option_node = make_node (TARGET_OPTION_NODE); - tree_contains_struct[FUNCTION_DECL][TS_DECL_NON_COMMON] = 1; - tree_contains_struct[TRANSLATION_UNIT_DECL][TS_DECL_NON_COMMON] = 1; - tree_contains_struct[TYPE_DECL][TS_DECL_NON_COMMON] = 1; - - - tree_contains_struct[CONST_DECL][TS_DECL_COMMON] = 1; - tree_contains_struct[VAR_DECL][TS_DECL_COMMON] = 1; - tree_contains_struct[PARM_DECL][TS_DECL_COMMON] = 1; - tree_contains_struct[RESULT_DECL][TS_DECL_COMMON] = 1; - tree_contains_struct[FUNCTION_DECL][TS_DECL_COMMON] = 1; - tree_contains_struct[TYPE_DECL][TS_DECL_COMMON] = 1; - tree_contains_struct[TRANSLATION_UNIT_DECL][TS_DECL_COMMON] = 1; - tree_contains_struct[LABEL_DECL][TS_DECL_COMMON] = 1; - tree_contains_struct[FIELD_DECL][TS_DECL_COMMON] = 1; - - - tree_contains_struct[CONST_DECL][TS_DECL_WRTL] = 1; - tree_contains_struct[VAR_DECL][TS_DECL_WRTL] = 1; - tree_contains_struct[PARM_DECL][TS_DECL_WRTL] = 1; - tree_contains_struct[RESULT_DECL][TS_DECL_WRTL] = 1; - tree_contains_struct[FUNCTION_DECL][TS_DECL_WRTL] = 1; - tree_contains_struct[LABEL_DECL][TS_DECL_WRTL] = 1; - - tree_contains_struct[CONST_DECL][TS_DECL_MINIMAL] = 1; - tree_contains_struct[VAR_DECL][TS_DECL_MINIMAL] = 1; - tree_contains_struct[PARM_DECL][TS_DECL_MINIMAL] = 1; - tree_contains_struct[RESULT_DECL][TS_DECL_MINIMAL] = 1; - tree_contains_struct[FUNCTION_DECL][TS_DECL_MINIMAL] = 1; - tree_contains_struct[TYPE_DECL][TS_DECL_MINIMAL] = 1; - tree_contains_struct[TRANSLATION_UNIT_DECL][TS_DECL_MINIMAL] = 1; - tree_contains_struct[LABEL_DECL][TS_DECL_MINIMAL] = 1; - tree_contains_struct[FIELD_DECL][TS_DECL_MINIMAL] = 1; - tree_contains_struct[NAME_MEMORY_TAG][TS_DECL_MINIMAL] = 1; - tree_contains_struct[SYMBOL_MEMORY_TAG][TS_DECL_MINIMAL] = 1; - tree_contains_struct[MEMORY_PARTITION_TAG][TS_DECL_MINIMAL] = 1; - - tree_contains_struct[NAME_MEMORY_TAG][TS_MEMORY_TAG] = 1; - tree_contains_struct[SYMBOL_MEMORY_TAG][TS_MEMORY_TAG] = 1; - tree_contains_struct[MEMORY_PARTITION_TAG][TS_MEMORY_TAG] = 1; - - tree_contains_struct[MEMORY_PARTITION_TAG][TS_MEMORY_PARTITION_TAG] = 1; - - tree_contains_struct[VAR_DECL][TS_DECL_WITH_VIS] = 1; - tree_contains_struct[FUNCTION_DECL][TS_DECL_WITH_VIS] = 1; - tree_contains_struct[TYPE_DECL][TS_DECL_WITH_VIS] = 1; - tree_contains_struct[TRANSLATION_UNIT_DECL][TS_DECL_WITH_VIS] = 1; - - tree_contains_struct[VAR_DECL][TS_VAR_DECL] = 1; - tree_contains_struct[FIELD_DECL][TS_FIELD_DECL] = 1; - tree_contains_struct[PARM_DECL][TS_PARM_DECL] = 1; - tree_contains_struct[LABEL_DECL][TS_LABEL_DECL] = 1; - tree_contains_struct[RESULT_DECL][TS_RESULT_DECL] = 1; - tree_contains_struct[CONST_DECL][TS_CONST_DECL] = 1; - tree_contains_struct[TYPE_DECL][TS_TYPE_DECL] = 1; - tree_contains_struct[FUNCTION_DECL][TS_FUNCTION_DECL] = 1; - + /* Initialize the tree_contains_struct array. */ + initialize_tree_contains_struct (); lang_hooks.init_ts (); } @@ -463,11 +660,6 @@ tree_code_size (enum tree_code code) return sizeof (struct tree_type_decl); case FUNCTION_DECL: return sizeof (struct tree_function_decl); - case NAME_MEMORY_TAG: - case SYMBOL_MEMORY_TAG: - return sizeof (struct tree_memory_tag); - case MEMORY_PARTITION_TAG: - return sizeof (struct tree_memory_partition_tag); default: return sizeof (struct tree_decl_non_common); } @@ -671,11 +863,11 @@ make_node_stat (enum tree_code code MEM_STAT_DECL) } else DECL_ALIGN (t) = 1; - /* We have not yet computed the alias set for this declaration. */ - DECL_POINTER_ALIAS_SET (t) = -1; } DECL_SOURCE_LOCATION (t) = input_location; DECL_UID (t) = next_decl_uid++; + if (TREE_CODE (t) == LABEL_DECL) + LABEL_DECL_UID (t) = -1; break; @@ -761,11 +953,6 @@ copy_node_stat (tree node MEM_STAT_DECL) SET_DECL_INIT_PRIORITY (t, DECL_INIT_PRIORITY (node)); DECL_HAS_INIT_PRIORITY_P (t) = 1; } - if (TREE_CODE (node) == VAR_DECL && DECL_BASED_ON_RESTRICT_P (node)) - { - SET_DECL_RESTRICT_BASE (t, DECL_GET_RESTRICT_BASE (node)); - DECL_BASED_ON_RESTRICT_P (t) = 1; - } } else if (TREE_CODE_CLASS (code) == tcc_type) { @@ -1604,7 +1791,8 @@ tree_floor_log2 (const_tree expr) : floor_log2 (low)); } -/* Return 1 if EXPR is the real constant zero. */ +/* Return 1 if EXPR is the real constant zero. Trailing zeroes matter for + decimal float constants, so don't return 1 for them. */ int real_zerop (const_tree expr) @@ -1612,13 +1800,16 @@ real_zerop (const_tree expr) STRIP_NOPS (expr); return ((TREE_CODE (expr) == REAL_CST - && REAL_VALUES_EQUAL (TREE_REAL_CST (expr), dconst0)) + && REAL_VALUES_EQUAL (TREE_REAL_CST (expr), dconst0) + && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr))))) || (TREE_CODE (expr) == COMPLEX_CST && real_zerop (TREE_REALPART (expr)) && real_zerop (TREE_IMAGPART (expr)))); } -/* Return 1 if EXPR is the real constant one in real or complex form. */ +/* Return 1 if EXPR is the real constant one in real or complex form. + Trailing zeroes matter for decimal float constants, so don't return + 1 for them. */ int real_onep (const_tree expr) @@ -1626,13 +1817,15 @@ real_onep (const_tree expr) STRIP_NOPS (expr); return ((TREE_CODE (expr) == REAL_CST - && REAL_VALUES_EQUAL (TREE_REAL_CST (expr), dconst1)) + && REAL_VALUES_EQUAL (TREE_REAL_CST (expr), dconst1) + && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr))))) || (TREE_CODE (expr) == COMPLEX_CST && real_onep (TREE_REALPART (expr)) && real_zerop (TREE_IMAGPART (expr)))); } -/* Return 1 if EXPR is the real constant two. */ +/* Return 1 if EXPR is the real constant two. Trailing zeroes matter + for decimal float constants, so don't return 1 for them. */ int real_twop (const_tree expr) @@ -1640,13 +1833,15 @@ real_twop (const_tree expr) STRIP_NOPS (expr); return ((TREE_CODE (expr) == REAL_CST - && REAL_VALUES_EQUAL (TREE_REAL_CST (expr), dconst2)) + && REAL_VALUES_EQUAL (TREE_REAL_CST (expr), dconst2) + && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr))))) || (TREE_CODE (expr) == COMPLEX_CST && real_twop (TREE_REALPART (expr)) && real_zerop (TREE_IMAGPART (expr)))); } -/* Return 1 if EXPR is the real constant minus one. */ +/* Return 1 if EXPR is the real constant minus one. Trailing zeroes + matter for decimal float constants, so don't return 1 for them. */ int real_minus_onep (const_tree expr) @@ -1654,7 +1849,8 @@ real_minus_onep (const_tree expr) STRIP_NOPS (expr); return ((TREE_CODE (expr) == REAL_CST - && REAL_VALUES_EQUAL (TREE_REAL_CST (expr), dconstm1)) + && REAL_VALUES_EQUAL (TREE_REAL_CST (expr), dconstm1) + && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr))))) || (TREE_CODE (expr) == COMPLEX_CST && real_minus_onep (TREE_REALPART (expr)) && real_zerop (TREE_IMAGPART (expr)))); @@ -1800,6 +1996,18 @@ tree_last (tree chain) return chain; } +/* Return the node in a chain of nodes whose value is x, NULL if not found. */ + +tree +tree_find_value (tree chain, tree x) +{ + tree list; + for (list = chain; list; list = TREE_CHAIN (list)) + if (TREE_VALUE (list) == x) + return list; + return NULL; +} + /* Reverse the order of elements in the chain T, and return the new head of the chain (old last element). */ @@ -1828,6 +2036,23 @@ build_tree_list_stat (tree parm, tree value MEM_STAT_DECL) return t; } +/* Build a chain of TREE_LIST nodes from a vector. */ + +tree +build_tree_list_vec_stat (const VEC(tree,gc) *vec MEM_STAT_DECL) +{ + tree ret = NULL_TREE; + tree *pp = &ret; + unsigned int i; + tree t; + for (i = 0; VEC_iterate (tree, vec, i, t); ++i) + { + *pp = build_tree_list_stat (NULL, t PASS_MEM_STAT); + pp = &TREE_CHAIN (*pp); + } + return ret; +} + /* Return a newly created TREE_LIST node whose purpose and value fields are PURPOSE and VALUE and whose TREE_CHAIN is CHAIN. */ @@ -1871,6 +2096,22 @@ ctor_to_list (tree ctor) return list; } + +/* Return the values of the elements of a CONSTRUCTOR as a vector of + trees. */ + +VEC(tree,gc) * +ctor_to_vec (tree ctor) +{ + VEC(tree, gc) *vec = VEC_alloc (tree, gc, CONSTRUCTOR_NELTS (ctor)); + unsigned int ix; + tree val; + + FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (ctor), ix, val) + VEC_quick_push (tree, vec, val); + + return vec; +} /* Return the size nominally occupied by an object of type TYPE when it resides in memory. The value is measured in units of bytes, @@ -2096,8 +2337,7 @@ staticp (tree arg) case COMPONENT_REF: /* If the thing being referenced is not a field, then it is something language specific. */ - if (TREE_CODE (TREE_OPERAND (arg, 1)) != FIELD_DECL) - return (*lang_hooks.staticp) (arg); + gcc_assert (TREE_CODE (TREE_OPERAND (arg, 1)) == FIELD_DECL); /* If we are referencing a bitfield, we can't evaluate an ADDR_EXPR at compile time and so it isn't a constant. */ @@ -2120,14 +2360,13 @@ staticp (tree arg) && TREE_CODE (TREE_OPERAND (arg, 1)) == INTEGER_CST) return staticp (TREE_OPERAND (arg, 0)); else - return false; + return NULL; + + case COMPOUND_LITERAL_EXPR: + return TREE_STATIC (COMPOUND_LITERAL_EXPR_DECL (arg)) ? arg : NULL; default: - if ((unsigned int) TREE_CODE (arg) - >= (unsigned int) LAST_AND_UNUSED_TREE_CODE) - return lang_hooks.staticp (arg); - else - return NULL; + return NULL; } } @@ -2172,6 +2411,40 @@ decl_address_invariant_p (const_tree op) return false; } +/* Return whether OP is a DECL whose address is interprocedural-invariant. */ + +bool +decl_address_ip_invariant_p (const_tree op) +{ + /* The conditions below are slightly less strict than the one in + staticp. */ + + switch (TREE_CODE (op)) + { + case LABEL_DECL: + case FUNCTION_DECL: + case STRING_CST: + return true; + + case VAR_DECL: + if (((TREE_STATIC (op) || DECL_EXTERNAL (op)) + && !DECL_DLLIMPORT_P (op)) + || DECL_THREAD_LOCAL_P (op)) + return true; + break; + + case CONST_DECL: + if ((TREE_STATIC (op) || DECL_EXTERNAL (op))) + return true; + break; + + default: + break; + } + + return false; +} + /* Return true if T is function-invariant (internal function, does not handle arithmetic; that's handled in skip_simple_arithmetic and @@ -2288,6 +2561,7 @@ save_expr (tree expr) return t; t = build1 (SAVE_EXPR, TREE_TYPE (expr), t); + SET_EXPR_LOCATION (t, EXPR_LOCATION (expr)); /* This expression might be placed ahead of a jump to ensure that the value was computed on both sides of the jump. So make sure it isn't @@ -2334,83 +2608,44 @@ skip_simple_arithmetic (tree expr) return inner; } + /* Return which tree structure is used by T. */ enum tree_node_structure_enum tree_node_structure (const_tree t) { const enum tree_code code = TREE_CODE (t); + return tree_node_structure_for_code (code); +} - switch (TREE_CODE_CLASS (code)) - { - case tcc_declaration: +/* Set various status flags when building a CALL_EXPR object T. */ + +static void +process_call_operands (tree t) +{ + bool side_effects = TREE_SIDE_EFFECTS (t); + bool read_only = false; + int i = call_expr_flags (t); + + /* Calls have side-effects, except those to const or pure functions. */ + if ((i & ECF_LOOPING_CONST_OR_PURE) || !(i & (ECF_CONST | ECF_PURE))) + side_effects = true; + /* Propagate TREE_READONLY of arguments for const functions. */ + if (i & ECF_CONST) + read_only = true; + + if (!side_effects || read_only) + for (i = 1; i < TREE_OPERAND_LENGTH (t); i++) { - switch (code) - { - case FIELD_DECL: - return TS_FIELD_DECL; - case PARM_DECL: - return TS_PARM_DECL; - case VAR_DECL: - return TS_VAR_DECL; - case LABEL_DECL: - return TS_LABEL_DECL; - case RESULT_DECL: - return TS_RESULT_DECL; - case CONST_DECL: - return TS_CONST_DECL; - case TYPE_DECL: - return TS_TYPE_DECL; - case FUNCTION_DECL: - return TS_FUNCTION_DECL; - case SYMBOL_MEMORY_TAG: - case NAME_MEMORY_TAG: - case MEMORY_PARTITION_TAG: - return TS_MEMORY_TAG; - default: - return TS_DECL_NON_COMMON; - } + tree op = TREE_OPERAND (t, i); + if (op && TREE_SIDE_EFFECTS (op)) + side_effects = true; + if (op && !TREE_READONLY (op) && !CONSTANT_CLASS_P (op)) + read_only = false; } - case tcc_type: - return TS_TYPE; - case tcc_reference: - case tcc_comparison: - case tcc_unary: - case tcc_binary: - case tcc_expression: - case tcc_statement: - case tcc_vl_exp: - return TS_EXP; - default: /* tcc_constant and tcc_exceptional */ - break; - } - switch (code) - { - /* tcc_constant cases. */ - case INTEGER_CST: return TS_INT_CST; - case REAL_CST: return TS_REAL_CST; - case FIXED_CST: return TS_FIXED_CST; - case COMPLEX_CST: return TS_COMPLEX; - case VECTOR_CST: return TS_VECTOR; - case STRING_CST: return TS_STRING; - /* tcc_exceptional cases. */ - case ERROR_MARK: return TS_COMMON; - case IDENTIFIER_NODE: return TS_IDENTIFIER; - case TREE_LIST: return TS_LIST; - case TREE_VEC: return TS_VEC; - case SSA_NAME: return TS_SSA_NAME; - case PLACEHOLDER_EXPR: return TS_COMMON; - case STATEMENT_LIST: return TS_STATEMENT_LIST; - case BLOCK: return TS_BLOCK; - case CONSTRUCTOR: return TS_CONSTRUCTOR; - case TREE_BINFO: return TS_BINFO; - case OMP_CLAUSE: return TS_OMP_CLAUSE; - case OPTIMIZATION_NODE: return TS_OPTIMIZATION; - case TARGET_OPTION_NODE: return TS_TARGET_OPTION; - default: - gcc_unreachable (); - } + TREE_SIDE_EFFECTS (t) = side_effects; + TREE_READONLY (t) = read_only; } /* Return 1 if EXP contains a PLACEHOLDER_EXPR; i.e., if it represents a size @@ -2458,6 +2693,11 @@ contains_placeholder_p (const_tree exp) || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp, 1)) || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp, 2))); + case SAVE_EXPR: + /* The save_expr function never wraps anything containing + a PLACEHOLDER_EXPR. */ + return 0; + default: break; } @@ -2583,18 +2823,109 @@ type_contains_placeholder_p (tree type) return result; } +/* Push tree EXP onto vector QUEUE if it is not already present. */ + +static void +push_without_duplicates (tree exp, VEC (tree, heap) **queue) +{ + unsigned int i; + tree iter; + + for (i = 0; VEC_iterate (tree, *queue, i, iter); i++) + if (simple_cst_equal (iter, exp) == 1) + break; + + if (!iter) + VEC_safe_push (tree, heap, *queue, exp); +} + +/* Given a tree EXP, find all occurences of references to fields + in a PLACEHOLDER_EXPR and place them in vector REFS without + duplicates. Also record VAR_DECLs and CONST_DECLs. Note that + we assume here that EXP contains only arithmetic expressions + or CALL_EXPRs with PLACEHOLDER_EXPRs occurring only in their + argument list. */ + +void +find_placeholder_in_expr (tree exp, VEC (tree, heap) **refs) +{ + enum tree_code code = TREE_CODE (exp); + tree inner; + int i; + + /* We handle TREE_LIST and COMPONENT_REF separately. */ + if (code == TREE_LIST) + { + FIND_PLACEHOLDER_IN_EXPR (TREE_CHAIN (exp), refs); + FIND_PLACEHOLDER_IN_EXPR (TREE_VALUE (exp), refs); + } + else if (code == COMPONENT_REF) + { + for (inner = TREE_OPERAND (exp, 0); + REFERENCE_CLASS_P (inner); + inner = TREE_OPERAND (inner, 0)) + ; + + if (TREE_CODE (inner) == PLACEHOLDER_EXPR) + push_without_duplicates (exp, refs); + else + FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, 0), refs); + } + else + switch (TREE_CODE_CLASS (code)) + { + case tcc_constant: + break; + + case tcc_declaration: + /* Variables allocated to static storage can stay. */ + if (!TREE_STATIC (exp)) + push_without_duplicates (exp, refs); + break; + + case tcc_expression: + /* This is the pattern built in ada/make_aligning_type. */ + if (code == ADDR_EXPR + && TREE_CODE (TREE_OPERAND (exp, 0)) == PLACEHOLDER_EXPR) + { + push_without_duplicates (exp, refs); + break; + } + + /* Fall through... */ + + case tcc_exceptional: + case tcc_unary: + case tcc_binary: + case tcc_comparison: + case tcc_reference: + for (i = 0; i < TREE_CODE_LENGTH (code); i++) + FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, i), refs); + break; + + case tcc_vl_exp: + for (i = 1; i < TREE_OPERAND_LENGTH (exp); i++) + FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, i), refs); + break; + + default: + gcc_unreachable (); + } +} + /* Given a tree EXP, a FIELD_DECL F, and a replacement value R, return a tree with all occurrences of references to F in a - PLACEHOLDER_EXPR replaced by R. Note that we assume here that EXP - contains only arithmetic expressions or a CALL_EXPR with a - PLACEHOLDER_EXPR occurring only in its arglist. */ + PLACEHOLDER_EXPR replaced by R. Also handle VAR_DECLs and + CONST_DECLs. Note that we assume here that EXP contains only + arithmetic expressions or CALL_EXPRs with PLACEHOLDER_EXPRs + occurring only in their argument list. */ tree substitute_in_expr (tree exp, tree f, tree r) { enum tree_code code = TREE_CODE (exp); tree op0, op1, op2, op3; - tree new, inner; + tree new_tree; /* We handle TREE_LIST and COMPONENT_REF separately. */ if (code == TREE_LIST) @@ -2607,40 +2938,55 @@ substitute_in_expr (tree exp, tree f, tree r) return tree_cons (TREE_PURPOSE (exp), op1, op0); } else if (code == COMPONENT_REF) - { - /* If this expression is getting a value from a PLACEHOLDER_EXPR - and it is the right field, replace it with R. */ - for (inner = TREE_OPERAND (exp, 0); - REFERENCE_CLASS_P (inner); - inner = TREE_OPERAND (inner, 0)) - ; - if (TREE_CODE (inner) == PLACEHOLDER_EXPR - && TREE_OPERAND (exp, 1) == f) - return r; - - /* If this expression hasn't been completed let, leave it alone. */ - if (TREE_CODE (inner) == PLACEHOLDER_EXPR && TREE_TYPE (inner) == 0) - return exp; - - op0 = SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp, 0), f, r); - if (op0 == TREE_OPERAND (exp, 0)) - return exp; - - new = fold_build3 (COMPONENT_REF, TREE_TYPE (exp), - op0, TREE_OPERAND (exp, 1), NULL_TREE); + { + tree inner; + + /* If this expression is getting a value from a PLACEHOLDER_EXPR + and it is the right field, replace it with R. */ + for (inner = TREE_OPERAND (exp, 0); + REFERENCE_CLASS_P (inner); + inner = TREE_OPERAND (inner, 0)) + ; + + /* The field. */ + op1 = TREE_OPERAND (exp, 1); + + if (TREE_CODE (inner) == PLACEHOLDER_EXPR && op1 == f) + return r; + + /* If this expression hasn't been completed let, leave it alone. */ + if (TREE_CODE (inner) == PLACEHOLDER_EXPR && !TREE_TYPE (inner)) + return exp; + + op0 = SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp, 0), f, r); + if (op0 == TREE_OPERAND (exp, 0)) + return exp; + + new_tree + = fold_build3 (COMPONENT_REF, TREE_TYPE (exp), op0, op1, NULL_TREE); } else switch (TREE_CODE_CLASS (code)) { case tcc_constant: - case tcc_declaration: return exp; + case tcc_declaration: + if (exp == f) + return r; + else + return exp; + + case tcc_expression: + if (exp == f) + return r; + + /* Fall through... */ + case tcc_exceptional: case tcc_unary: case tcc_binary: case tcc_comparison: - case tcc_expression: case tcc_reference: switch (TREE_CODE_LENGTH (code)) { @@ -2652,7 +2998,7 @@ substitute_in_expr (tree exp, tree f, tree r) if (op0 == TREE_OPERAND (exp, 0)) return exp; - new = fold_build1 (code, TREE_TYPE (exp), op0); + new_tree = fold_build1 (code, TREE_TYPE (exp), op0); break; case 2: @@ -2662,7 +3008,7 @@ substitute_in_expr (tree exp, tree f, tree r) if (op0 == TREE_OPERAND (exp, 0) && op1 == TREE_OPERAND (exp, 1)) return exp; - new = fold_build2 (code, TREE_TYPE (exp), op0, op1); + new_tree = fold_build2 (code, TREE_TYPE (exp), op0, op1); break; case 3: @@ -2674,7 +3020,7 @@ substitute_in_expr (tree exp, tree f, tree r) && op2 == TREE_OPERAND (exp, 2)) return exp; - new = fold_build3 (code, TREE_TYPE (exp), op0, op1, op2); + new_tree = fold_build3 (code, TREE_TYPE (exp), op0, op1, op2); break; case 4: @@ -2688,7 +3034,8 @@ substitute_in_expr (tree exp, tree f, tree r) && op3 == TREE_OPERAND (exp, 3)) return exp; - new = fold (build4 (code, TREE_TYPE (exp), op0, op1, op2, op3)); + new_tree + = fold (build4 (code, TREE_TYPE (exp), op0, op1, op2, op3)); break; default: @@ -2698,23 +3045,39 @@ substitute_in_expr (tree exp, tree f, tree r) case tcc_vl_exp: { - tree copy = NULL_TREE; int i; + new_tree = NULL_TREE; + + /* If we are trying to replace F with a constant, inline back + functions which do nothing else than computing a value from + the arguments they are passed. This makes it possible to + fold partially or entirely the replacement expression. */ + if (CONSTANT_CLASS_P (r) && code == CALL_EXPR) + { + tree t = maybe_inline_call_in_expr (exp); + if (t) + return SUBSTITUTE_IN_EXPR (t, f, r); + } + for (i = 1; i < TREE_OPERAND_LENGTH (exp); i++) { tree op = TREE_OPERAND (exp, i); tree new_op = SUBSTITUTE_IN_EXPR (op, f, r); if (new_op != op) { - if (!copy) - copy = copy_node (exp); - TREE_OPERAND (copy, i) = new_op; + if (!new_tree) + new_tree = copy_node (exp); + TREE_OPERAND (new_tree, i) = new_op; } } - if (copy) - new = fold (copy); + if (new_tree) + { + new_tree = fold (new_tree); + if (TREE_CODE (new_tree) == CALL_EXPR) + process_call_operands (new_tree); + } else return exp; } @@ -2724,8 +3087,8 @@ substitute_in_expr (tree exp, tree f, tree r) gcc_unreachable (); } - TREE_READONLY (new) = TREE_READONLY (exp); - return new; + TREE_READONLY (new_tree) |= TREE_READONLY (exp); + return new_tree; } /* Similar, but look for a PLACEHOLDER_EXPR in EXP and find a replacement @@ -2736,6 +3099,7 @@ substitute_placeholder_in_expr (tree exp, tree obj) { enum tree_code code = TREE_CODE (exp); tree op0, op1, op2, op3; + tree new_tree; /* If this is a PLACEHOLDER_EXPR, see if we find a corresponding type in the chain of OBJ. */ @@ -2811,8 +3175,9 @@ substitute_placeholder_in_expr (tree exp, tree obj) op0 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, 0), obj); if (op0 == TREE_OPERAND (exp, 0)) return exp; - else - return fold_build1 (code, TREE_TYPE (exp), op0); + + new_tree = fold_build1 (code, TREE_TYPE (exp), op0); + break; case 2: op0 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, 0), obj); @@ -2820,8 +3185,9 @@ substitute_placeholder_in_expr (tree exp, tree obj) if (op0 == TREE_OPERAND (exp, 0) && op1 == TREE_OPERAND (exp, 1)) return exp; - else - return fold_build2 (code, TREE_TYPE (exp), op0, op1); + + new_tree = fold_build2 (code, TREE_TYPE (exp), op0, op1); + break; case 3: op0 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, 0), obj); @@ -2831,8 +3197,9 @@ substitute_placeholder_in_expr (tree exp, tree obj) if (op0 == TREE_OPERAND (exp, 0) && op1 == TREE_OPERAND (exp, 1) && op2 == TREE_OPERAND (exp, 2)) return exp; - else - return fold_build3 (code, TREE_TYPE (exp), op0, op1, op2); + + new_tree = fold_build3 (code, TREE_TYPE (exp), op0, op1, op2); + break; case 4: op0 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, 0), obj); @@ -2844,8 +3211,10 @@ substitute_placeholder_in_expr (tree exp, tree obj) && op2 == TREE_OPERAND (exp, 2) && op3 == TREE_OPERAND (exp, 3)) return exp; - else - return fold (build4 (code, TREE_TYPE (exp), op0, op1, op2, op3)); + + new_tree + = fold (build4 (code, TREE_TYPE (exp), op0, op1, op2, op3)); + break; default: gcc_unreachable (); @@ -2854,30 +3223,39 @@ substitute_placeholder_in_expr (tree exp, tree obj) case tcc_vl_exp: { - tree copy = NULL_TREE; int i; + new_tree = NULL_TREE; + for (i = 1; i < TREE_OPERAND_LENGTH (exp); i++) { tree op = TREE_OPERAND (exp, i); tree new_op = SUBSTITUTE_PLACEHOLDER_IN_EXPR (op, obj); if (new_op != op) { - if (!copy) - copy = copy_node (exp); - TREE_OPERAND (copy, i) = new_op; + if (!new_tree) + new_tree = copy_node (exp); + TREE_OPERAND (new_tree, i) = new_op; } } - if (copy) - return fold (copy); + if (new_tree) + { + new_tree = fold (new_tree); + if (TREE_CODE (new_tree) == CALL_EXPR) + process_call_operands (new_tree); + } else return exp; } + break; default: gcc_unreachable (); } + + TREE_READONLY (new_tree) |= TREE_READONLY (exp); + return new_tree; } /* Stabilize a reference so that we can use it any number of times @@ -3225,18 +3603,19 @@ build1_stat (enum tree_code code, tree type, tree node MEM_STAT_DECL) return t; } -#define PROCESS_ARG(N) \ - do { \ - TREE_OPERAND (t, N) = arg##N; \ - if (arg##N &&!TYPE_P (arg##N)) \ - { \ - if (TREE_SIDE_EFFECTS (arg##N)) \ - side_effects = 1; \ - if (!TREE_READONLY (arg##N)) \ - read_only = 0; \ - if (!TREE_CONSTANT (arg##N)) \ - constant = 0; \ - } \ +#define PROCESS_ARG(N) \ + do { \ + TREE_OPERAND (t, N) = arg##N; \ + if (arg##N &&!TYPE_P (arg##N)) \ + { \ + if (TREE_SIDE_EFFECTS (arg##N)) \ + side_effects = 1; \ + if (!TREE_READONLY (arg##N) \ + && !CONSTANT_CLASS_P (arg##N)) \ + read_only = 0; \ + if (!TREE_CONSTANT (arg##N)) \ + constant = 0; \ + } \ } while (0) tree @@ -3248,8 +3627,13 @@ build2_stat (enum tree_code code, tree tt, tree arg0, tree arg1 MEM_STAT_DECL) gcc_assert (TREE_CODE_LENGTH (code) == 2); if ((code == MINUS_EXPR || code == PLUS_EXPR || code == MULT_EXPR) - && arg0 && arg1 && tt && POINTER_TYPE_P (tt)) - gcc_assert (TREE_CODE (arg0) == INTEGER_CST && TREE_CODE (arg1) == INTEGER_CST); + && arg0 && arg1 && tt && POINTER_TYPE_P (tt) + /* When sizetype precision doesn't match that of pointers + we need to be able to build explicit extensions or truncations + of the offset argument. */ + && TYPE_PRECISION (sizetype) == TYPE_PRECISION (tt)) + gcc_assert (TREE_CODE (arg0) == INTEGER_CST + && TREE_CODE (arg1) == INTEGER_CST); if (code == POINTER_PLUS_EXPR && arg0 && arg1 && tt) gcc_assert (POINTER_TYPE_P (tt) && POINTER_TYPE_P (TREE_TYPE (arg0)) @@ -3298,6 +3682,8 @@ build3_stat (enum tree_code code, tree tt, tree arg0, tree arg1, t = make_node_stat (code PASS_MEM_STAT); TREE_TYPE (t) = tt; + read_only = 1; + /* As a special exception, if COND_EXPR has NULL branches, we assume that it is a gimple statement and always consider it to have side effects. */ @@ -3313,6 +3699,9 @@ build3_stat (enum tree_code code, tree tt, tree arg0, tree arg1, PROCESS_ARG(1); PROCESS_ARG(2); + if (code == COND_EXPR) + TREE_READONLY (t) = read_only; + TREE_SIDE_EFFECTS (t) = side_effects; TREE_THIS_VOLATILE (t) = (TREE_CODE_CLASS (code) == tcc_reference @@ -3377,9 +3766,8 @@ build5_stat (enum tree_code code, tree tt, tree arg0, tree arg1, } tree -build7_stat (enum tree_code code, tree tt, tree arg0, tree arg1, - tree arg2, tree arg3, tree arg4, tree arg5, - tree arg6 MEM_STAT_DECL) +build6_stat (enum tree_code code, tree tt, tree arg0, tree arg1, + tree arg2, tree arg3, tree arg4, tree arg5 MEM_STAT_DECL) { bool constant, read_only, side_effects; tree t; @@ -3397,7 +3785,6 @@ build7_stat (enum tree_code code, tree tt, tree arg0, tree arg1, PROCESS_ARG(3); PROCESS_ARG(4); PROCESS_ARG(5); - PROCESS_ARG(6); TREE_SIDE_EFFECTS (t) = side_effects; TREE_THIS_VOLATILE (t) = 0; @@ -3448,19 +3835,40 @@ build_nt_call_list (tree fn, tree arglist) CALL_EXPR_ARG (t, i) = TREE_VALUE (arglist); return t; } + +/* Similar to build_nt, but for creating a CALL_EXPR object with a + tree VEC. */ + +tree +build_nt_call_vec (tree fn, VEC(tree,gc) *args) +{ + tree ret, t; + unsigned int ix; + + ret = build_vl_exp (CALL_EXPR, VEC_length (tree, args) + 3); + CALL_EXPR_FN (ret) = fn; + CALL_EXPR_STATIC_CHAIN (ret) = NULL_TREE; + for (ix = 0; VEC_iterate (tree, args, ix, t); ++ix) + CALL_EXPR_ARG (ret, ix) = t; + return ret; +} /* Create a DECL_... node of code CODE, name NAME and data type TYPE. We do NOT enter this node in any sort of symbol table. + LOC is the location of the decl. + layout_decl is used to set up the decl's storage layout. Other slots are initialized to 0 or null pointers. */ tree -build_decl_stat (enum tree_code code, tree name, tree type MEM_STAT_DECL) +build_decl_stat (location_t loc, enum tree_code code, tree name, + tree type MEM_STAT_DECL) { tree t; t = make_node_stat (code PASS_MEM_STAT); + DECL_SOURCE_LOCATION (t) = loc; /* if (type == error_mark_node) type = integer_type_node; */ @@ -3482,7 +3890,7 @@ tree build_fn_decl (const char *name, tree type) { tree id = get_identifier (name); - tree decl = build_decl (FUNCTION_DECL, id, type); + tree decl = build_decl (input_location, FUNCTION_DECL, id, type); DECL_EXTERNAL (decl) = 1; TREE_PUBLIC (decl) = 1; @@ -3532,16 +3940,15 @@ expand_location (source_location loc) } -/* Source location accessor functions. */ +/* Like SET_EXPR_LOCATION, but make sure the tree can have a location. + LOC is the location to use in tree T. */ void -set_expr_locus (tree node, source_location *loc) +protected_set_expr_location (tree t, location_t loc) { - if (loc == NULL) - EXPR_CHECK (node)->exp.locus = UNKNOWN_LOCATION; - else - EXPR_CHECK (node)->exp.locus = *loc; + if (t && CAN_HAVE_LOCATION_P (t)) + SET_EXPR_LOCATION (t, loc); } /* Return a declaration like DDECL except that its DECL_ATTRIBUTES @@ -3580,24 +3987,6 @@ iterative_hash_hashval_t (hashval_t val, hashval_t val2) return val2; } -/* Produce good hash value combining PTR and VAL2. */ -static inline hashval_t -iterative_hash_pointer (const void *ptr, hashval_t val2) -{ - if (sizeof (ptr) == sizeof (hashval_t)) - return iterative_hash_hashval_t ((size_t) ptr, val2); - else - { - hashval_t a = (hashval_t) (size_t) ptr; - /* Avoid warnings about shifting of more than the width of the type on - hosts that won't execute this path. */ - int zero = 0; - hashval_t b = (hashval_t) ((size_t) ptr >> (sizeof (hashval_t) * 8 + zero)); - mix (a, b, val2); - return val2; - } -} - /* Produce good hash value combining VAL and VAL2. */ static inline hashval_t iterative_hash_host_wide_int (HOST_WIDE_INT val, hashval_t val2) @@ -3653,10 +4042,10 @@ build_type_attribute_qual_variant (tree ttype, tree attribute, int quals) return build_qualified_type (ttype, quals); } + ttype = build_qualified_type (ttype, TYPE_UNQUALIFIED); ntype = build_distinct_type_copy (ttype); TYPE_ATTRIBUTES (ntype) = attribute; - set_type_quals (ntype, TYPE_UNQUALIFIED); hashcode = iterative_hash_object (code, hashcode); if (TREE_TYPE (ntype)) @@ -3695,12 +4084,11 @@ build_type_attribute_qual_variant (tree ttype, tree attribute, int quals) /* If the target-dependent attributes make NTYPE different from its canonical type, we will need to use structural equality - checks for this qualified type. */ - ttype = build_qualified_type (ttype, TYPE_UNQUALIFIED); + checks for this type. */ if (TYPE_STRUCTURAL_EQUALITY_P (ttype) || !targetm.comp_type_attributes (ntype, ttype)) SET_TYPE_STRUCTURAL_EQUALITY (ntype); - else + else if (TYPE_CANONICAL (ntype) == ntype) TYPE_CANONICAL (ntype) = TYPE_CANONICAL (ttype); ttype = build_qualified_type (ntype, quals); @@ -3915,7 +4303,7 @@ merge_decl_attributes (tree olddecl, tree newdecl) The second instance of `foo' nullifies the dllimport. */ tree -merge_dllimport_decl_attributes (tree old, tree new) +merge_dllimport_decl_attributes (tree old, tree new_tree) { tree a; int delete_dllimport_p = 1; @@ -3926,16 +4314,16 @@ merge_dllimport_decl_attributes (tree old, tree new) is not dllimport'd. We also remove a `new' dllimport if the old list contains dllexport: dllexport always overrides dllimport, regardless of the order of declaration. */ - if (!VAR_OR_FUNCTION_DECL_P (new)) + if (!VAR_OR_FUNCTION_DECL_P (new_tree)) delete_dllimport_p = 0; - else if (DECL_DLLIMPORT_P (new) + else if (DECL_DLLIMPORT_P (new_tree) && lookup_attribute ("dllexport", DECL_ATTRIBUTES (old))) { - DECL_DLLIMPORT_P (new) = 0; + DECL_DLLIMPORT_P (new_tree) = 0; warning (OPT_Wattributes, "%q+D already declared with dllexport attribute: " - "dllimport ignored", new); + "dllimport ignored", new_tree); } - else if (DECL_DLLIMPORT_P (old) && !DECL_DLLIMPORT_P (new)) + else if (DECL_DLLIMPORT_P (old) && !DECL_DLLIMPORT_P (new_tree)) { /* Warn about overriding a symbol that has already been used, e.g.: extern int __attribute__ ((dllimport)) foo; @@ -3945,27 +4333,27 @@ merge_dllimport_decl_attributes (tree old, tree new) if (TREE_USED (old)) { warning (0, "%q+D redeclared without dllimport attribute " - "after being referenced with dll linkage", new); + "after being referenced with dll linkage", new_tree); /* If we have used a variable's address with dllimport linkage, keep the old DECL_DLLIMPORT_P flag: the ADDR_EXPR using the decl may already have had TREE_CONSTANT computed. We still remove the attribute so that assembler code refers to '&foo rather than '_imp__foo'. */ if (TREE_CODE (old) == VAR_DECL && TREE_ADDRESSABLE (old)) - DECL_DLLIMPORT_P (new) = 1; + DECL_DLLIMPORT_P (new_tree) = 1; } /* Let an inline definition silently override the external reference, but otherwise warn about attribute inconsistency. */ - else if (TREE_CODE (new) == VAR_DECL - || !DECL_DECLARED_INLINE_P (new)) + else if (TREE_CODE (new_tree) == VAR_DECL + || !DECL_DECLARED_INLINE_P (new_tree)) warning (OPT_Wattributes, "%q+D redeclared without dllimport attribute: " - "previous dllimport ignored", new); + "previous dllimport ignored", new_tree); } else delete_dllimport_p = 0; - a = merge_attributes (DECL_ATTRIBUTES (old), DECL_ATTRIBUTES (new)); + a = merge_attributes (DECL_ATTRIBUTES (old), DECL_ATTRIBUTES (new_tree)); if (delete_dllimport_p) { @@ -3998,6 +4386,7 @@ handle_dll_attribute (tree * pnode, tree name, tree args, int flags, bool *no_add_attrs) { tree node = *pnode; + bool is_dllimport; /* These attributes may apply to structure and union types being created, but otherwise should pass to the declaration involved. */ @@ -4018,8 +4407,8 @@ handle_dll_attribute (tree * pnode, tree name, tree args, int flags, } else { - warning (OPT_Wattributes, "%qs attribute ignored", - IDENTIFIER_POINTER (name)); + warning (OPT_Wattributes, "%qE attribute ignored", + name); *no_add_attrs = true; return NULL_TREE; } @@ -4030,8 +4419,8 @@ handle_dll_attribute (tree * pnode, tree name, tree args, int flags, && TREE_CODE (node) != TYPE_DECL) { *no_add_attrs = true; - warning (OPT_Wattributes, "%qs attribute ignored", - IDENTIFIER_POINTER (name)); + warning (OPT_Wattributes, "%qE attribute ignored", + name); return NULL_TREE; } @@ -4040,14 +4429,16 @@ handle_dll_attribute (tree * pnode, tree name, tree args, int flags, && TREE_CODE (TREE_TYPE (node)) != UNION_TYPE) { *no_add_attrs = true; - warning (OPT_Wattributes, "%qs attribute ignored", - IDENTIFIER_POINTER (name)); + warning (OPT_Wattributes, "%qE attribute ignored", + name); return NULL_TREE; } + is_dllimport = is_attribute_p ("dllimport", name); + /* Report error on dllimport ambiguities seen now before they cause any damage. */ - else if (is_attribute_p ("dllimport", name)) + if (is_dllimport) { /* Honor any target-specific overrides. */ if (!targetm.valid_dllimport_attribute_p (node)) @@ -4089,6 +4480,10 @@ handle_dll_attribute (tree * pnode, tree name, tree args, int flags, if (*no_add_attrs == false) DECL_DLLIMPORT_P (node) = 1; } + else if (TREE_CODE (node) == FUNCTION_DECL + && DECL_DECLARED_INLINE_P (node)) + /* An exported function, even if inline, must be emitted. */ + DECL_EXTERNAL (node) = 0; /* Report error if symbol is not accessible at global scope. */ if (!TREE_PUBLIC (node) @@ -4096,7 +4491,7 @@ handle_dll_attribute (tree * pnode, tree name, tree args, int flags, || TREE_CODE (node) == FUNCTION_DECL)) { error ("external linkage required for symbol %q+D because of " - "%qs attribute", node, IDENTIFIER_POINTER (name)); + "%qE attribute", node, name); *no_add_attrs = true; } @@ -4109,9 +4504,9 @@ handle_dll_attribute (tree * pnode, tree name, tree args, int flags, { if (DECL_VISIBILITY_SPECIFIED (node) && DECL_VISIBILITY (node) != VISIBILITY_DEFAULT) - error ("%qs implies default visibility, but %qD has already " + error ("%qE implies default visibility, but %qD has already " "been declared with a different visibility", - IDENTIFIER_POINTER (name), node); + name, node); DECL_VISIBILITY (node) = VISIBILITY_DEFAULT; DECL_VISIBILITY_SPECIFIED (node) = 1; } @@ -4360,44 +4755,14 @@ decl_init_priority_insert (tree decl, priority_type priority) /* Set the finalization priority for DECL to PRIORITY. */ void -decl_fini_priority_insert (tree decl, priority_type priority) -{ - struct tree_priority_map *h; - - gcc_assert (TREE_CODE (decl) == FUNCTION_DECL); - h = decl_priority_info (decl); - h->fini = priority; -} - -/* Look up a restrict qualified base decl for FROM. */ - -tree -decl_restrict_base_lookup (tree from) -{ - struct tree_map *h; - struct tree_map in; - - in.base.from = from; - h = (struct tree_map *) htab_find_with_hash (restrict_base_for_decl, &in, - htab_hash_pointer (from)); - return h ? h->to : NULL_TREE; -} - -/* Record the restrict qualified base TO for FROM. */ - -void -decl_restrict_base_insert (tree from, tree to) -{ - struct tree_map *h; - void **loc; - - h = GGC_NEW (struct tree_map); - h->hash = htab_hash_pointer (from); - h->base.from = from; - h->to = to; - loc = htab_find_slot_with_hash (restrict_base_for_decl, h, h->hash, INSERT); - *(struct tree_map **) loc = h; -} +decl_fini_priority_insert (tree decl, priority_type priority) +{ + struct tree_priority_map *h; + + gcc_assert (TREE_CODE (decl) == FUNCTION_DECL); + h = decl_priority_info (decl); + h->fini = priority; +} /* Print out the statistics for the DECL_DEBUG_EXPR hash table. */ @@ -4421,20 +4786,6 @@ print_value_expr_statistics (void) htab_collisions (value_expr_for_decl)); } -/* Print out statistics for the RESTRICT_BASE_FOR_DECL hash table, but - don't print anything if the table is empty. */ - -static void -print_restrict_base_statistics (void) -{ - if (htab_elements (restrict_base_for_decl) != 0) - fprintf (stderr, - "RESTRICT_BASE hash: size %ld, %ld elements, %f collisions\n", - (long) htab_size (restrict_base_for_decl), - (long) htab_elements (restrict_base_for_decl), - htab_collisions (restrict_base_for_decl)); -} - /* Lookup a debug expression for FROM, and return it if we find one. */ tree @@ -4534,7 +4885,9 @@ type_hash_eq (const void *va, const void *vb) || !attribute_list_equal (TYPE_ATTRIBUTES (a->type), TYPE_ATTRIBUTES (b->type)) || TYPE_ALIGN (a->type) != TYPE_ALIGN (b->type) - || TYPE_MODE (a->type) != TYPE_MODE (b->type)) + || TYPE_MODE (a->type) != TYPE_MODE (b->type) + || (TREE_CODE (a->type) != COMPLEX_TYPE + && TYPE_NAME (a->type) != TYPE_NAME (b->type))) return 0; switch (TREE_CODE (a->type)) @@ -4983,6 +5336,33 @@ tree_int_cst_sgn (const_tree t) return 1; } +/* Return the minimum number of bits needed to represent VALUE in a + signed or unsigned type, UNSIGNEDP says which. */ + +unsigned int +tree_int_cst_min_precision (tree value, bool unsignedp) +{ + int log; + + /* If the value is negative, compute its negative minus 1. The latter + adjustment is because the absolute value of the largest negative value + is one larger than the largest positive value. This is equivalent to + a bit-wise negation, so use that operation instead. */ + + if (tree_int_cst_sgn (value) < 0) + value = fold_build1 (BIT_NOT_EXPR, TREE_TYPE (value), value); + + /* Return the number of bits needed, taking into account the fact + that we need one more bit for a signed than unsigned type. */ + + if (integer_zerop (value)) + log = 0; + else + log = tree_floor_log2 (value); + + return log + 1 + !unsignedp; +} + /* Compare two constructor-element-type constants. Return 1 if the lists are known to be equal; otherwise return 0. */ @@ -5022,16 +5402,16 @@ simple_cst_equal (const_tree t1, const_tree t2) code1 = TREE_CODE (t1); code2 = TREE_CODE (t2); - if (code1 == NOP_EXPR || code1 == CONVERT_EXPR || code1 == NON_LVALUE_EXPR) + if (CONVERT_EXPR_CODE_P (code1) || code1 == NON_LVALUE_EXPR) { - if (code2 == NOP_EXPR || code2 == CONVERT_EXPR + if (CONVERT_EXPR_CODE_P (code2) || code2 == NON_LVALUE_EXPR) return simple_cst_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); else return simple_cst_equal (TREE_OPERAND (t1, 0), t2); } - else if (code2 == NOP_EXPR || code2 == CONVERT_EXPR + else if (CONVERT_EXPR_CODE_P (code2) || code2 == NON_LVALUE_EXPR) return simple_cst_equal (t1, TREE_OPERAND (t2, 0)); @@ -5253,10 +5633,10 @@ iterative_hash_expr (const_tree t, hashval_t val) { int i; enum tree_code code; - char class; + char tclass; if (t == NULL_TREE) - return iterative_hash_pointer (t, val); + return iterative_hash_hashval_t (0, val); code = TREE_CODE (t); @@ -5290,7 +5670,7 @@ iterative_hash_expr (const_tree t, hashval_t val) case SSA_NAME: /* we can just compare by pointer. */ - return iterative_hash_pointer (t, val); + return iterative_hash_host_wide_int (SSA_NAME_VERSION (t), val); case TREE_LIST: /* A list of expressions, for a CALL_EXPR or as the elements of a @@ -5310,36 +5690,36 @@ iterative_hash_expr (const_tree t, hashval_t val) return val; } case FUNCTION_DECL: - /* When referring to a built-in FUNCTION_DECL, use the - __builtin__ form. Otherwise nodes that compare equal - according to operand_equal_p might get different - hash codes. */ - if (DECL_BUILT_IN (t)) + /* When referring to a built-in FUNCTION_DECL, use the __builtin__ form. + Otherwise nodes that compare equal according to operand_equal_p might + get different hash codes. However, don't do this for machine specific + or front end builtins, since the function code is overloaded in those + cases. */ + if (DECL_BUILT_IN_CLASS (t) == BUILT_IN_NORMAL + && built_in_decls[DECL_FUNCTION_CODE (t)]) { - val = iterative_hash_pointer (built_in_decls[DECL_FUNCTION_CODE (t)], - val); - return val; + t = built_in_decls[DECL_FUNCTION_CODE (t)]; + code = TREE_CODE (t); } - /* else FALL THROUGH */ + /* FALL THROUGH */ default: - class = TREE_CODE_CLASS (code); + tclass = TREE_CODE_CLASS (code); - if (class == tcc_declaration) + if (tclass == tcc_declaration) { /* DECL's have a unique ID */ val = iterative_hash_host_wide_int (DECL_UID (t), val); } else { - gcc_assert (IS_EXPR_CODE_CLASS (class)); + gcc_assert (IS_EXPR_CODE_CLASS (tclass)); val = iterative_hash_object (code, val); /* Don't hash the type, that can lead to having nodes which compare equal according to operand_equal_p, but which have different hash codes. */ - if (code == NOP_EXPR - || code == CONVERT_EXPR + if (CONVERT_EXPR_CODE_P (code) || code == NON_LVALUE_EXPR) { /* Make sure to include signness in the hash computation. */ @@ -5439,7 +5819,7 @@ build_pointer_type_for_mode (tree to_type, enum machine_mode mode, t = make_node (POINTER_TYPE); TREE_TYPE (t) = to_type; - TYPE_MODE (t) = mode; + SET_TYPE_MODE (t, mode); TYPE_REF_CAN_ALIAS_ALL (t) = can_alias_all; TYPE_NEXT_PTR_TO (t) = TYPE_POINTER_TO (to_type); TYPE_POINTER_TO (to_type) = t; @@ -5503,7 +5883,7 @@ build_reference_type_for_mode (tree to_type, enum machine_mode mode, t = make_node (REFERENCE_TYPE); TREE_TYPE (t) = to_type; - TYPE_MODE (t) = mode; + SET_TYPE_MODE (t, mode); TYPE_REF_CAN_ALIAS_ALL (t) = can_alias_all; TYPE_NEXT_REF_TO (t) = TYPE_REFERENCE_TO (to_type); TYPE_REFERENCE_TO (to_type) = t; @@ -5572,7 +5952,7 @@ build_index_type (tree maxval) TYPE_PRECISION (itype) = TYPE_PRECISION (sizetype); TYPE_MIN_VALUE (itype) = size_zero_node; TYPE_MAX_VALUE (itype) = fold_convert (sizetype, maxval); - TYPE_MODE (itype) = TYPE_MODE (sizetype); + SET_TYPE_MODE (itype, TYPE_MODE (sizetype)); TYPE_SIZE (itype) = TYPE_SIZE (sizetype); TYPE_SIZE_UNIT (itype) = TYPE_SIZE_UNIT (sizetype); TYPE_ALIGN (itype) = TYPE_ALIGN (sizetype); @@ -5628,7 +6008,7 @@ build_range_type (tree type, tree lowval, tree highval) TYPE_MAX_VALUE (itype) = highval ? fold_convert (type, highval) : NULL; TYPE_PRECISION (itype) = TYPE_PRECISION (type); - TYPE_MODE (itype) = TYPE_MODE (type); + SET_TYPE_MODE (itype, TYPE_MODE (type)); TYPE_SIZE (itype) = TYPE_SIZE (type); TYPE_SIZE_UNIT (itype) = TYPE_SIZE_UNIT (type); TYPE_ALIGN (itype) = TYPE_ALIGN (type); @@ -5642,6 +6022,57 @@ build_range_type (tree type, tree lowval, tree highval) return itype; } +/* Return true if the debug information for TYPE, a subtype, should be emitted + as a subrange type. If so, set LOWVAL to the low bound and HIGHVAL to the + high bound, respectively. Sometimes doing so unnecessarily obfuscates the + debug info and doesn't reflect the source code. */ + +bool +subrange_type_for_debug_p (const_tree type, tree *lowval, tree *highval) +{ + tree base_type = TREE_TYPE (type), low, high; + + /* Subrange types have a base type which is an integral type. */ + if (!INTEGRAL_TYPE_P (base_type)) + return false; + + /* Get the real bounds of the subtype. */ + if (lang_hooks.types.get_subrange_bounds) + lang_hooks.types.get_subrange_bounds (type, &low, &high); + else + { + low = TYPE_MIN_VALUE (type); + high = TYPE_MAX_VALUE (type); + } + + /* If the type and its base type have the same representation and the same + name, then the type is not a subrange but a copy of the base type. */ + if ((TREE_CODE (base_type) == INTEGER_TYPE + || TREE_CODE (base_type) == BOOLEAN_TYPE) + && int_size_in_bytes (type) == int_size_in_bytes (base_type) + && tree_int_cst_equal (low, TYPE_MIN_VALUE (base_type)) + && tree_int_cst_equal (high, TYPE_MAX_VALUE (base_type))) + { + tree type_name = TYPE_NAME (type); + tree base_type_name = TYPE_NAME (base_type); + + if (type_name && TREE_CODE (type_name) == TYPE_DECL) + type_name = DECL_NAME (type_name); + + if (base_type_name && TREE_CODE (base_type_name) == TYPE_DECL) + base_type_name = DECL_NAME (base_type_name); + + if (type_name == base_type_name) + return false; + } + + if (lowval) + *lowval = low; + if (highval) + *highval = high; + return true; +} + /* Just like build_index_type, but takes lowval and highval instead of just highval (maxval). */ @@ -5845,6 +6276,91 @@ build_function_type (tree value_type, tree arg_types) return t; } +/* Build variant of function type ORIG_TYPE skipping ARGS_TO_SKIP. */ + +tree +build_function_type_skip_args (tree orig_type, bitmap args_to_skip) +{ + tree new_type = NULL; + tree args, new_args = NULL, t; + tree new_reversed; + int i = 0; + + for (args = TYPE_ARG_TYPES (orig_type); args && args != void_list_node; + args = TREE_CHAIN (args), i++) + if (!bitmap_bit_p (args_to_skip, i)) + new_args = tree_cons (NULL_TREE, TREE_VALUE (args), new_args); + + new_reversed = nreverse (new_args); + if (args) + { + if (new_reversed) + TREE_CHAIN (new_args) = void_list_node; + else + new_reversed = void_list_node; + } + gcc_assert (new_reversed); + + /* Use copy_node to preserve as much as possible from original type + (debug info, attribute lists etc.) + Exception is METHOD_TYPEs must have THIS argument. + When we are asked to remove it, we need to build new FUNCTION_TYPE + instead. */ + if (TREE_CODE (orig_type) != METHOD_TYPE + || !bitmap_bit_p (args_to_skip, 0)) + { + new_type = copy_node (orig_type); + TYPE_ARG_TYPES (new_type) = new_reversed; + } + else + { + new_type + = build_distinct_type_copy (build_function_type (TREE_TYPE (orig_type), + new_reversed)); + TYPE_CONTEXT (new_type) = TYPE_CONTEXT (orig_type); + } + + /* This is a new type, not a copy of an old type. Need to reassociate + variants. We can handle everything except the main variant lazily. */ + t = TYPE_MAIN_VARIANT (orig_type); + if (orig_type != t) + { + TYPE_MAIN_VARIANT (new_type) = t; + TYPE_NEXT_VARIANT (new_type) = TYPE_NEXT_VARIANT (t); + TYPE_NEXT_VARIANT (t) = new_type; + } + else + { + TYPE_MAIN_VARIANT (new_type) = new_type; + TYPE_NEXT_VARIANT (new_type) = NULL; + } + return new_type; +} + +/* Build variant of function type ORIG_TYPE skipping ARGS_TO_SKIP. + + Arguments from DECL_ARGUMENTS list can't be removed now, since they are + linked by TREE_CHAIN directly. It is caller responsibility to eliminate + them when they are being duplicated (i.e. copy_arguments_for_versioning). */ + +tree +build_function_decl_skip_args (tree orig_decl, bitmap args_to_skip) +{ + tree new_decl = copy_node (orig_decl); + tree new_type; + + new_type = TREE_TYPE (orig_decl); + if (prototype_p (new_type)) + new_type = build_function_type_skip_args (new_type, args_to_skip); + TREE_TYPE (new_decl) = new_type; + + /* For declarations setting DECL_VINDEX (i.e. methods) + we expect first argument to be THIS pointer. */ + if (bitmap_bit_p (args_to_skip, 0)) + DECL_VINDEX (new_decl) = NULL_TREE; + return new_decl; +} + /* Build a function type. The RETURN_TYPE is the type returned by the function. If VAARGS is set, no void_type_node is appended to the the list. ARGP muse be alway be terminated be a NULL_TREE. */ @@ -5860,9 +6376,9 @@ build_function_type_list_1 (bool vaargs, tree return_type, va_list argp) if (vaargs) { - last = args; - if (args != NULL_TREE) - args = nreverse (args); + last = args; + if (args != NULL_TREE) + args = nreverse (args); gcc_assert (args != NULL_TREE && last != void_list_node); } else if (args == NULL_TREE) @@ -6032,6 +6548,10 @@ build_complex_type (tree component_type) tree t; hashval_t hashcode; + gcc_assert (INTEGRAL_TYPE_P (component_type) + || SCALAR_FLOAT_TYPE_P (component_type) + || FIXED_POINT_TYPE_P (component_type)); + /* Make a node of the sort we want. */ t = make_node (COMPLEX_TYPE); @@ -6083,11 +6603,67 @@ build_complex_type (tree component_type) name = 0; if (name != 0) - TYPE_NAME (t) = build_decl (TYPE_DECL, get_identifier (name), t); + TYPE_NAME (t) = build_decl (UNKNOWN_LOCATION, TYPE_DECL, + get_identifier (name), t); } return build_qualified_type (t, TYPE_QUALS (component_type)); } + +/* If TYPE is a real or complex floating-point type and the target + does not directly support arithmetic on TYPE then return the wider + type to be used for arithmetic on TYPE. Otherwise, return + NULL_TREE. */ + +tree +excess_precision_type (tree type) +{ + if (flag_excess_precision != EXCESS_PRECISION_FAST) + { + int flt_eval_method = TARGET_FLT_EVAL_METHOD; + switch (TREE_CODE (type)) + { + case REAL_TYPE: + switch (flt_eval_method) + { + case 1: + if (TYPE_MODE (type) == TYPE_MODE (float_type_node)) + return double_type_node; + break; + case 2: + if (TYPE_MODE (type) == TYPE_MODE (float_type_node) + || TYPE_MODE (type) == TYPE_MODE (double_type_node)) + return long_double_type_node; + break; + default: + gcc_unreachable (); + } + break; + case COMPLEX_TYPE: + if (TREE_CODE (TREE_TYPE (type)) != REAL_TYPE) + return NULL_TREE; + switch (flt_eval_method) + { + case 1: + if (TYPE_MODE (TREE_TYPE (type)) == TYPE_MODE (float_type_node)) + return complex_double_type_node; + break; + case 2: + if (TYPE_MODE (TREE_TYPE (type)) == TYPE_MODE (float_type_node) + || (TYPE_MODE (TREE_TYPE (type)) + == TYPE_MODE (double_type_node))) + return complex_long_double_type_node; + break; + default: + gcc_unreachable (); + } + break; + default: + break; + } + } + return NULL_TREE; +} /* Return OP, stripped of any conversions to wider types as much as is safe. Converting the value back to OP's type makes a value equivalent to OP. @@ -6270,11 +6846,28 @@ get_narrower (tree op, int *unsignedp_ptr) int int_fits_type_p (const_tree c, const_tree type) { - tree type_low_bound = TYPE_MIN_VALUE (type); - tree type_high_bound = TYPE_MAX_VALUE (type); - bool ok_for_low_bound, ok_for_high_bound; - unsigned HOST_WIDE_INT low; - HOST_WIDE_INT high; + tree type_low_bound, type_high_bound; + bool ok_for_low_bound, ok_for_high_bound, unsc; + double_int dc, dd; + + dc = tree_to_double_int (c); + unsc = TYPE_UNSIGNED (TREE_TYPE (c)); + + if (TREE_CODE (TREE_TYPE (c)) == INTEGER_TYPE + && TYPE_IS_SIZETYPE (TREE_TYPE (c)) + && unsc) + /* So c is an unsigned integer whose type is sizetype and type is not. + sizetype'd integers are sign extended even though they are + unsigned. If the integer value fits in the lower end word of c, + and if the higher end word has all its bits set to 1, that + means the higher end bits are set to 1 only for sign extension. + So let's convert c into an equivalent zero extended unsigned + integer. */ + dc = double_int_zext (dc, TYPE_PRECISION (TREE_TYPE (c))); + +retry: + type_low_bound = TYPE_MIN_VALUE (type); + type_high_bound = TYPE_MAX_VALUE (type); /* If at least one bound of the type is a constant integer, we can check ourselves and maybe make a decision. If no such decision is possible, but @@ -6286,10 +6879,25 @@ int_fits_type_p (const_tree c, const_tree type) for "unknown if constant fits", 0 for "constant known *not* to fit" and 1 for "constant known to fit". */ - /* Check if C >= type_low_bound. */ + /* Check if c >= type_low_bound. */ if (type_low_bound && TREE_CODE (type_low_bound) == INTEGER_CST) { - if (tree_int_cst_lt (c, type_low_bound)) + dd = tree_to_double_int (type_low_bound); + if (TREE_CODE (type) == INTEGER_TYPE + && TYPE_IS_SIZETYPE (type) + && TYPE_UNSIGNED (type)) + dd = double_int_zext (dd, TYPE_PRECISION (type)); + if (unsc != TYPE_UNSIGNED (TREE_TYPE (type_low_bound))) + { + int c_neg = (!unsc && double_int_negative_p (dc)); + int t_neg = (unsc && double_int_negative_p (dd)); + + if (c_neg && !t_neg) + return 0; + if ((c_neg || !t_neg) && double_int_ucmp (dc, dd) < 0) + return 0; + } + else if (double_int_cmp (dc, dd, unsc) < 0) return 0; ok_for_low_bound = true; } @@ -6299,7 +6907,22 @@ int_fits_type_p (const_tree c, const_tree type) /* Check if c <= type_high_bound. */ if (type_high_bound && TREE_CODE (type_high_bound) == INTEGER_CST) { - if (tree_int_cst_lt (type_high_bound, c)) + dd = tree_to_double_int (type_high_bound); + if (TREE_CODE (type) == INTEGER_TYPE + && TYPE_IS_SIZETYPE (type) + && TYPE_UNSIGNED (type)) + dd = double_int_zext (dd, TYPE_PRECISION (type)); + if (unsc != TYPE_UNSIGNED (TREE_TYPE (type_high_bound))) + { + int c_neg = (!unsc && double_int_negative_p (dc)); + int t_neg = (unsc && double_int_negative_p (dd)); + + if (t_neg && !c_neg) + return 0; + if ((t_neg || !c_neg) && double_int_ucmp (dc, dd) > 0) + return 0; + } + else if (double_int_cmp (dc, dd, unsc) > 0) return 0; ok_for_high_bound = true; } @@ -6313,7 +6936,7 @@ int_fits_type_p (const_tree c, const_tree type) /* Perform some generic filtering which may allow making a decision even if the bounds are not constant. First, negative integers never fit in unsigned types, */ - if (TYPE_UNSIGNED (type) && tree_int_cst_sgn (c) < 0) + if (TYPE_UNSIGNED (type) && !unsc && double_int_negative_p (dc)) return 0; /* Second, narrower types always fit in wider ones. */ @@ -6321,10 +6944,18 @@ int_fits_type_p (const_tree c, const_tree type) return 1; /* Third, unsigned integers with top bit set never fit signed types. */ - if (! TYPE_UNSIGNED (type) - && TYPE_UNSIGNED (TREE_TYPE (c)) - && tree_int_cst_msb (c)) - return 0; + if (! TYPE_UNSIGNED (type) && unsc) + { + int prec = GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (c))) - 1; + if (prec < HOST_BITS_PER_WIDE_INT) + { + if (((((unsigned HOST_WIDE_INT) 1) << prec) & dc.low) != 0) + return 0; + } + else if (((((unsigned HOST_WIDE_INT) 1) + << (prec - HOST_BITS_PER_WIDE_INT)) & dc.high) != 0) + return 0; + } /* If we haven't been able to decide at this point, there nothing more we can check ourselves here. Look at the base type if we have one and it @@ -6332,12 +6963,13 @@ int_fits_type_p (const_tree c, const_tree type) if (TREE_CODE (type) == INTEGER_TYPE && TREE_TYPE (type) != 0 && TYPE_PRECISION (type) == TYPE_PRECISION (TREE_TYPE (type))) - return int_fits_type_p (c, TREE_TYPE (type)); + { + type = TREE_TYPE (type); + goto retry; + } /* Or to fit_double_type, if nothing else. */ - low = TREE_INT_CST_LOW (c); - high = TREE_INT_CST_HIGH (c); - return !fit_double_type (low, high, &low, &high, type); + return !fit_double_type (dc.low, dc.high, &dc.low, &dc.high, type); } /* Stores bounds of an integer TYPE in MIN and MAX. If TYPE has non-constant @@ -6627,9 +7259,8 @@ get_callee_fndecl (const_tree call) && TREE_CODE (TREE_OPERAND (addr, 0)) == FUNCTION_DECL) return TREE_OPERAND (addr, 0); - /* We couldn't figure out what was being called. Maybe the front - end has some idea. */ - return lang_hooks.lang_get_callee_fndecl (call); + /* We couldn't figure out what was being called. */ + return NULL_TREE; } /* Print debugging information about tree nodes generated during the compile, @@ -6666,7 +7297,6 @@ dump_tree_statistics (void) print_type_hash_statistics (); print_debug_expr_statistics (); print_value_expr_statistics (); - print_restrict_base_statistics (); lang_hooks.print_statistics (); } @@ -6732,7 +7362,7 @@ get_file_function_name (const char *type) /* If we already have a name we know to be unique, just use that. */ if (first_global_object_name) - p = first_global_object_name; + p = q = ASTRDUP (first_global_object_name); /* If the target is handling the constructors/destructors, they will be local to this file and the name is only necessary for debugging purposes. */ @@ -6749,7 +7379,6 @@ get_file_function_name (const char *type) else p = file; p = q = ASTRDUP (p); - clean_symbol_name (q); } else { @@ -6768,7 +7397,6 @@ get_file_function_name (const char *type) len = strlen (file); q = (char *) alloca (9 * 2 + len + 1); memcpy (q, file, len + 1); - clean_symbol_name (q); sprintf (q + len, "_%08X_%08X", crc32_string (0, name), crc32_string (0, get_random_seed (false))); @@ -6776,6 +7404,7 @@ get_file_function_name (const char *type) p = q; } + clean_symbol_name (q); buf = (char *) alloca (sizeof (FILE_FUNCTION_FORMAT) + strlen (p) + strlen (type)); @@ -6895,7 +7524,7 @@ tree_range_check_failed (const_tree node, const char *file, int line, { char *buffer; unsigned length = 0; - enum tree_code c; + unsigned int c; for (c = c1; c <= c2; ++c) length += 4 + strlen (tree_code_name[c]); @@ -6956,7 +7585,7 @@ omp_clause_range_check_failed (const_tree node, const char *file, int line, { char *buffer; unsigned length = 0; - enum omp_clause_code c; + unsigned int c; for (c = c1; c <= c2; ++c) length += 4 + strlen (omp_clause_code_name[c]); @@ -7070,7 +7699,7 @@ make_vector_type (tree innertype, int nunits, enum machine_mode mode) t = make_node (VECTOR_TYPE); TREE_TYPE (t) = TYPE_MAIN_VARIANT (innertype); SET_TYPE_VECTOR_SUBPARTS (t, nunits); - TYPE_MODE (t) = mode; + SET_TYPE_MODE (t, mode); TYPE_READONLY (t) = TYPE_READONLY (innertype); TYPE_VOLATILE (t) = TYPE_VOLATILE (innertype); @@ -7085,10 +7714,12 @@ make_vector_type (tree innertype, int nunits, enum machine_mode mode) { tree index = build_int_cst (NULL_TREE, nunits - 1); - tree array = build_array_type (innertype, build_index_type (index)); + tree array = build_array_type (TYPE_MAIN_VARIANT (innertype), + build_index_type (index)); tree rt = make_node (RECORD_TYPE); - TYPE_FIELDS (rt) = build_decl (FIELD_DECL, get_identifier ("f"), array); + TYPE_FIELDS (rt) = build_decl (UNKNOWN_LOCATION, FIELD_DECL, + get_identifier ("f"), array); DECL_CONTEXT (TYPE_FIELDS (rt)) = rt; layout_type (rt); TYPE_DEBUG_REPRESENTATION_TYPE (t) = rt; @@ -7327,19 +7958,19 @@ build_common_tree_nodes_2 (int short_double) dfloat32_type_node = make_node (REAL_TYPE); TYPE_PRECISION (dfloat32_type_node) = DECIMAL32_TYPE_SIZE; layout_type (dfloat32_type_node); - TYPE_MODE (dfloat32_type_node) = SDmode; + SET_TYPE_MODE (dfloat32_type_node, SDmode); dfloat32_ptr_type_node = build_pointer_type (dfloat32_type_node); dfloat64_type_node = make_node (REAL_TYPE); TYPE_PRECISION (dfloat64_type_node) = DECIMAL64_TYPE_SIZE; layout_type (dfloat64_type_node); - TYPE_MODE (dfloat64_type_node) = DDmode; + SET_TYPE_MODE (dfloat64_type_node, DDmode); dfloat64_ptr_type_node = build_pointer_type (dfloat64_type_node); dfloat128_type_node = make_node (REAL_TYPE); TYPE_PRECISION (dfloat128_type_node) = DECIMAL128_TYPE_SIZE; layout_type (dfloat128_type_node); - TYPE_MODE (dfloat128_type_node) = TDmode; + SET_TYPE_MODE (dfloat128_type_node, TDmode); dfloat128_ptr_type_node = build_pointer_type (dfloat128_type_node); complex_integer_type_node = build_complex_type (integer_type_node); @@ -7559,7 +8190,7 @@ build_common_builtin_nodes (void) complex. Further, we can do slightly better with folding these beasties if the real and complex parts of the arguments are separate. */ { - enum machine_mode mode; + int mode; for (mode = MIN_MODE_COMPLEX_FLOAT; mode <= MAX_MODE_COMPLEX_FLOAT; ++mode) { @@ -7568,7 +8199,7 @@ build_common_builtin_nodes (void) enum built_in_function mcode, dcode; tree type, inner_type; - type = lang_hooks.types.type_for_mode (mode, 0); + type = lang_hooks.types.type_for_mode ((enum machine_mode) mode, 0); if (type == NULL) continue; inner_type = TREE_TYPE (type); @@ -7579,8 +8210,10 @@ build_common_builtin_nodes (void) tmp = tree_cons (NULL_TREE, inner_type, tmp); ftype = build_function_type (type, tmp); - mcode = BUILT_IN_COMPLEX_MUL_MIN + mode - MIN_MODE_COMPLEX_FLOAT; - dcode = BUILT_IN_COMPLEX_DIV_MIN + mode - MIN_MODE_COMPLEX_FLOAT; + mcode = ((enum built_in_function) + (BUILT_IN_COMPLEX_MUL_MIN + mode - MIN_MODE_COMPLEX_FLOAT)); + dcode = ((enum built_in_function) + (BUILT_IN_COMPLEX_DIV_MIN + mode - MIN_MODE_COMPLEX_FLOAT)); for (p = GET_MODE_NAME (mode), q = mode_name_buf; *p; p++, q++) *q = TOLOWER (*p); @@ -7699,6 +8332,19 @@ build_vector_type (tree innertype, int nunits) return make_vector_type (innertype, nunits, VOIDmode); } +/* Similarly, but takes the inner type and number of units, which must be + a power of two. */ + +tree +build_opaque_vector_type (tree innertype, int nunits) +{ + tree t; + innertype = build_distinct_type_copy (innertype); + t = make_vector_type (innertype, nunits, VOIDmode); + TYPE_VECTOR_OPAQUE (t) = true; + return t; +} + /* Build RESX_EXPR with given REGION_NUMBER. */ tree @@ -7761,19 +8407,22 @@ initializer_zerop (const_tree init) } } -/* Build an empty statement. */ +/* Build an empty statement at location LOC. */ tree -build_empty_stmt (void) +build_empty_stmt (location_t loc) { - return build1 (NOP_EXPR, void_type_node, size_zero_node); + tree t = build1 (NOP_EXPR, void_type_node, size_zero_node); + SET_EXPR_LOCATION (t, loc); + return t; } -/* Build an OpenMP clause with code CODE. */ +/* Build an OpenMP clause with code CODE. LOC is the location of the + clause. */ tree -build_omp_clause (enum omp_clause_code code) +build_omp_clause (location_t loc, enum omp_clause_code code) { tree t; int size, length; @@ -7785,6 +8434,7 @@ build_omp_clause (enum omp_clause_code code) memset (t, 0, size); TREE_SET_CODE (t, OMP_CLAUSE); OMP_CLAUSE_SET_CODE (t, code); + OMP_CLAUSE_LOCATION (t) = loc; #ifdef GATHER_STATISTICS tree_node_counts[(int) omp_clause_kind]++; @@ -7794,41 +8444,6 @@ build_omp_clause (enum omp_clause_code code) return t; } -/* Set various status flags when building a CALL_EXPR object T. */ - -static void -process_call_operands (tree t) -{ - bool side_effects; - - side_effects = TREE_SIDE_EFFECTS (t); - if (!side_effects) - { - int i, n; - n = TREE_OPERAND_LENGTH (t); - for (i = 1; i < n; i++) - { - tree op = TREE_OPERAND (t, i); - if (op && TREE_SIDE_EFFECTS (op)) - { - side_effects = 1; - break; - } - } - } - if (!side_effects) - { - int i; - - /* Calls have side-effects, except those to const or - pure functions. */ - i = call_expr_flags (t); - if ((i & ECF_LOOPING_CONST_OR_PURE) || !(i & (ECF_CONST | ECF_PURE))) - side_effects = 1; - } - TREE_SIDE_EFFECTS (t) = side_effects; -} - /* Build a tcc_vl_exp object with code CODE and room for LEN operands. LEN includes the implicit operand count in TREE_OPERAND 0, and so must be >= 1. Except for the CODE and operand count field, other storage for the @@ -7922,7 +8537,7 @@ build_call_valist (tree return_type, tree fn, int nargs, va_list args) which are specified as a tree array ARGS. */ tree -build_call_array (tree return_type, tree fn, int nargs, tree *args) +build_call_array (tree return_type, tree fn, int nargs, const tree *args) { tree t; int i; @@ -7937,6 +8552,24 @@ build_call_array (tree return_type, tree fn, int nargs, tree *args) return t; } +/* Like build_call_array, but takes a VEC. */ + +tree +build_call_vec (tree return_type, tree fn, VEC(tree,gc) *args) +{ + tree ret, t; + unsigned int ix; + + ret = build_vl_exp (CALL_EXPR, VEC_length (tree, args) + 3); + TREE_TYPE (ret) = return_type; + CALL_EXPR_FN (ret) = fn; + CALL_EXPR_STATIC_CHAIN (ret) = NULL_TREE; + for (ix = 0; VEC_iterate (tree, args, ix, t); ++ix) + CALL_EXPR_ARG (ret, ix) = t; + process_call_operands (ret); + return ret; +} + /* Returns true if it is possible to prove that the index of an array access REF (an ARRAY_REF expression) falls into the @@ -8082,6 +8715,36 @@ int_cst_value (const_tree x) return val; } +/* Return value of a constant X and sign-extend it. */ + +HOST_WIDEST_INT +widest_int_cst_value (const_tree x) +{ + unsigned bits = TYPE_PRECISION (TREE_TYPE (x)); + unsigned HOST_WIDEST_INT val = TREE_INT_CST_LOW (x); + +#if HOST_BITS_PER_WIDEST_INT > HOST_BITS_PER_WIDE_INT + gcc_assert (HOST_BITS_PER_WIDEST_INT >= 2 * HOST_BITS_PER_WIDE_INT); + val |= (((unsigned HOST_WIDEST_INT) TREE_INT_CST_HIGH (x)) + << HOST_BITS_PER_WIDE_INT); +#else + /* Make sure the sign-extended value will fit in a HOST_WIDE_INT. */ + gcc_assert (TREE_INT_CST_HIGH (x) == 0 + || TREE_INT_CST_HIGH (x) == -1); +#endif + + if (bits < HOST_BITS_PER_WIDEST_INT) + { + bool negative = ((val >> (bits - 1)) & 1) != 0; + if (negative) + val |= (~(unsigned HOST_WIDEST_INT) 0) << (bits - 1) << 1; + else + val &= ~((~(unsigned HOST_WIDEST_INT) 0) << (bits - 1) << 1); + } + + return val; +} + /* If TYPE is an integral type, return an equivalent type which is unsigned iff UNSIGNEDP is true. If TYPE is not an integral type, return TYPE itself. */ @@ -8569,10 +9232,6 @@ walk_tree_1 (tree *tp, walk_tree_fn func, void *data, WALK_SUBTREE_TAIL (TREE_OPERAND (*tp, len)); } - case CHANGE_DYNAMIC_TYPE_EXPR: - WALK_SUBTREE (CHANGE_DYNAMIC_TYPE_NEW_TYPE (*tp)); - WALK_SUBTREE_TAIL (CHANGE_DYNAMIC_TYPE_LOCATION (*tp)); - case DECL_EXPR: /* If this is a TYPE_DECL, walk into the fields of the type that it's defining. We only want to walk into these fields of a type in this @@ -8716,13 +9375,15 @@ call_expr_arglist (tree exp) } -/* Create a nameless artificial label and put it in the current function - context. Returns the newly created label. */ +/* Create a nameless artificial label and put it in the current + function context. The label has a location of LOC. Returns the + newly created label. */ tree -create_artificial_label (void) +create_artificial_label (location_t loc) { - tree lab = build_decl (LABEL_DECL, NULL_TREE, void_type_node); + tree lab = build_decl (loc, + LABEL_DECL, NULL_TREE, void_type_node); DECL_ARTIFICIAL (lab) = 1; DECL_IGNORED_P (lab) = 1; @@ -8787,26 +9448,6 @@ prototype_p (tree fntype) return (t != NULL_TREE); } -/* Return the number of arguments that a function has. */ - -int -function_args_count (tree fntype) -{ - function_args_iterator args_iter; - tree t; - int num = 0; - - if (fntype) - { - FOREACH_FUNCTION_ARGS(fntype, t, args_iter) - { - num++; - } - } - - return num; -} - /* If BLOCK is inlined from an __attribute__((__artificial__)) routine, return pointer to location from where it has been called. */ @@ -8820,7 +9461,9 @@ block_nonartificial_location (tree block) { tree ao = BLOCK_ABSTRACT_ORIGIN (block); - while (TREE_CODE (ao) == BLOCK && BLOCK_ABSTRACT_ORIGIN (ao)) + while (TREE_CODE (ao) == BLOCK + && BLOCK_ABSTRACT_ORIGIN (ao) + && BLOCK_ABSTRACT_ORIGIN (ao) != ao) ao = BLOCK_ABSTRACT_ORIGIN (ao); if (TREE_CODE (ao) == FUNCTION_DECL) @@ -8843,6 +9486,22 @@ block_nonartificial_location (tree block) return ret; } + +/* If EXP is inlined from an __attribute__((__artificial__)) + function, return the location of the original call expression. */ + +location_t +tree_nonartificial_location (tree exp) +{ + location_t *loc = block_nonartificial_location (TREE_BLOCK (exp)); + + if (loc) + return *loc; + else + return EXPR_LOCATION (exp); +} + + /* These are the hash table functions for the hash table of OPTIMIZATION_NODEq nodes. */ @@ -8971,4 +9630,134 @@ build_target_option_node (void) return t; } +/* Determine the "ultimate origin" of a block. The block may be an inlined + instance of an inlined instance of a block which is local to an inline + function, so we have to trace all of the way back through the origin chain + to find out what sort of node actually served as the original seed for the + given block. */ + +tree +block_ultimate_origin (const_tree block) +{ + tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block); + + /* output_inline_function sets BLOCK_ABSTRACT_ORIGIN for all the + nodes in the function to point to themselves; ignore that if + we're trying to output the abstract instance of this function. */ + if (BLOCK_ABSTRACT (block) && immediate_origin == block) + return NULL_TREE; + + if (immediate_origin == NULL_TREE) + return NULL_TREE; + else + { + tree ret_val; + tree lookahead = immediate_origin; + + do + { + ret_val = lookahead; + lookahead = (TREE_CODE (ret_val) == BLOCK + ? BLOCK_ABSTRACT_ORIGIN (ret_val) : NULL); + } + while (lookahead != NULL && lookahead != ret_val); + + /* The block's abstract origin chain may not be the *ultimate* origin of + the block. It could lead to a DECL that has an abstract origin set. + If so, we want that DECL's abstract origin (which is what DECL_ORIGIN + will give us if it has one). Note that DECL's abstract origins are + supposed to be the most distant ancestor (or so decl_ultimate_origin + claims), so we don't need to loop following the DECL origins. */ + if (DECL_P (ret_val)) + return DECL_ORIGIN (ret_val); + + return ret_val; + } +} + +/* Return true if T1 and T2 are equivalent lists. */ + +bool +list_equal_p (const_tree t1, const_tree t2) +{ + for (; t1 && t2; t1 = TREE_CHAIN (t1) , t2 = TREE_CHAIN (t2)) + if (TREE_VALUE (t1) != TREE_VALUE (t2)) + return false; + return !t1 && !t2; +} + +/* Return true iff conversion in EXP generates no instruction. Mark + it inline so that we fully inline into the stripping functions even + though we have two uses of this function. */ + +static inline bool +tree_nop_conversion (const_tree exp) +{ + tree outer_type, inner_type; + + if (!CONVERT_EXPR_P (exp) + && TREE_CODE (exp) != NON_LVALUE_EXPR) + return false; + if (TREE_OPERAND (exp, 0) == error_mark_node) + return false; + + outer_type = TREE_TYPE (exp); + inner_type = TREE_TYPE (TREE_OPERAND (exp, 0)); + + /* Use precision rather then machine mode when we can, which gives + the correct answer even for submode (bit-field) types. */ + if ((INTEGRAL_TYPE_P (outer_type) + || POINTER_TYPE_P (outer_type) + || TREE_CODE (outer_type) == OFFSET_TYPE) + && (INTEGRAL_TYPE_P (inner_type) + || POINTER_TYPE_P (inner_type) + || TREE_CODE (inner_type) == OFFSET_TYPE)) + return TYPE_PRECISION (outer_type) == TYPE_PRECISION (inner_type); + + /* Otherwise fall back on comparing machine modes (e.g. for + aggregate types, floats). */ + return TYPE_MODE (outer_type) == TYPE_MODE (inner_type); +} + +/* Return true iff conversion in EXP generates no instruction. Don't + consider conversions changing the signedness. */ + +static bool +tree_sign_nop_conversion (const_tree exp) +{ + tree outer_type, inner_type; + + if (!tree_nop_conversion (exp)) + return false; + + outer_type = TREE_TYPE (exp); + inner_type = TREE_TYPE (TREE_OPERAND (exp, 0)); + + return (TYPE_UNSIGNED (outer_type) == TYPE_UNSIGNED (inner_type) + && POINTER_TYPE_P (outer_type) == POINTER_TYPE_P (inner_type)); +} + +/* Strip conversions from EXP according to tree_nop_conversion and + return the resulting expression. */ + +tree +tree_strip_nop_conversions (tree exp) +{ + while (tree_nop_conversion (exp)) + exp = TREE_OPERAND (exp, 0); + return exp; +} + +/* Strip conversions from EXP according to tree_sign_nop_conversion + and return the resulting expression. */ + +tree +tree_strip_sign_nop_conversions (tree exp) +{ + while (tree_sign_nop_conversion (exp)) + exp = TREE_OPERAND (exp, 0); + return exp; +} + + #include "gt-tree.h"