X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Ftree.def;h=791d699a0c55acad06cab49e66d025e0c1b15963;hb=16bd2f3cbfa8c8526eeb3ed89b2f880fee4a9553;hp=c0507423671ad5fd0e8ea0f16e8285073f3dfe7d;hpb=ce45a448519f33c37b3ab6819fed86b28c267ab8;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/tree.def b/gcc/tree.def index c0507423671..791d699a0c5 100644 --- a/gcc/tree.def +++ b/gcc/tree.def @@ -1,13 +1,13 @@ /* This file contains the definitions and documentation for the tree codes used in GCC. - Copyright (C) 1987, 1988, 1993, 1995, 1997, 1998, 2000, 2001, 2004 - Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1993, 1995, 1997, 1998, 2000, 2001, 2004, 2005, + 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. 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 2, or (at your option) any later +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 @@ -16,9 +16,8 @@ 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 COPYING. If not, write to the Free -Software Foundation, 59 Temple Place - Suite 330, Boston, MA -02111-1307, USA. */ +along with GCC; see the file COPYING3. If not see +. */ /* For tcc_references, tcc_expression, tcc_comparison, tcc_unary, @@ -28,7 +27,12 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA different structures, and the size is determined by the tree_union member structure; the 4th element should be zero. Languages that define language-specific tcc_exceptional or tcc_constant codes must - define the tree_size langhook to say how big they are. */ + define the tree_size langhook to say how big they are. + + These tree codes have been sorted so that the macros in tree.h that + check for various tree codes are optimized into range checks. This + gives a measurable performance improvement. When adding a new + code, consider its placement in relation to the other codes. */ /* Any erroneous construct is parsed into a node of this type. This type of node is accepted without complaint in all contexts @@ -60,7 +64,6 @@ DEFTREECODE (TREE_VEC, "tree_vec", tcc_exceptional, 0) For a block which represents the outermost scope of a function, it points to the FUNCTION_DECL node. BLOCK_VARS points to a chain of decl nodes. - BLOCK_TYPE_TAGS points to a chain of types which have their own names. BLOCK_CHAIN points to the next BLOCK at the same level. BLOCK_ABSTRACT_ORIGIN points to the original (abstract) tree node which this block is an instance of, or else is NULL to indicate that this @@ -86,16 +89,6 @@ DEFTREECODE (BLOCK, "block", tcc_exceptional, 0) that are variants made by type modifiers such as "const" and "volatile". The TYPE_MAIN_VARIANT field, in any member of such a chain, points to the start of the chain. - The TYPE_NONCOPIED_PARTS field is a list specifying which parts - of an object of this type should *not* be copied by assignment. - The TREE_VALUE of each is a FIELD_DECL that should not be - copied. The TREE_PURPOSE is an initial value for that field when - an object of this type is initialized via an INIT_EXPR. It may - be NULL if no special value is required. Even the things in this - list are copied if the right-hand side of an assignment is known - to be a complete object (rather than being, perhaps, a subobject - of some other object.) The determination of what constitutes a - complete object is done by fixed_type_p. The TYPE_NAME field contains info on the name used in the program for this type (for GDB symbol table output). It is either a TYPE_DECL node, for types that are typedefs, or an IDENTIFIER_NODE @@ -118,31 +111,16 @@ DEFTREECODE (BLOCK, "block", tcc_exceptional, 0) ENUMERAL_TYPE, RECORD_TYPE, UNION_TYPE, and QUAL_UNION_TYPE nodes; see below. */ -DEFTREECODE (VOID_TYPE, "void_type", tcc_type, 0) - /* The void type in C */ - -/* Integer types in all languages, including char in C. - Also used for sub-ranges of other discrete types. - Has components TYPE_MIN_VALUE, TYPE_MAX_VALUE (expressions, inclusive) - and TYPE_PRECISION (number of bits used by this type). - In the case of a subrange type in Pascal, the TREE_TYPE - of this will point at the supertype (another INTEGER_TYPE, - or an ENUMERAL_TYPE, CHAR_TYPE, or BOOLEAN_TYPE). - Otherwise, the TREE_TYPE is zero. */ -DEFTREECODE (INTEGER_TYPE, "integer_type", tcc_type, 0) - -/* C's float and double. Different floating types are distinguished - by machine mode and by the TYPE_SIZE and the TYPE_PRECISION. */ -DEFTREECODE (REAL_TYPE, "real_type", tcc_type, 0) +/* The ordering of the following codes is optimized for the checking + macros in tree.h. Changing the order will degrade the speed of the + compiler. OFFSET_TYPE, ENUMERAL_TYPE, BOOLEAN_TYPE, INTEGER_TYPE, + REAL_TYPE, POINTER_TYPE. */ -/* Complex number types. The TREE_TYPE field is the data type - of the real and imaginary parts. */ -DEFTREECODE (COMPLEX_TYPE, "complex_type", tcc_type, 0) - -/* Vector types. The TREE_TYPE field is the data type of the vector - elements. The TYPE_PRECISION field is the number of subparts of - the vector. */ -DEFTREECODE (VECTOR_TYPE, "vector_type", tcc_type, 0) +/* An offset is a pointer relative to an object. + The TREE_TYPE field is the type of the object at the offset. + The TYPE_OFFSET_BASETYPE points to the node for the type of object + that the offset is relative to. */ +DEFTREECODE (OFFSET_TYPE, "offset_type", tcc_type, 0) /* C enums. The type node looks just like an INTEGER_TYPE node. The symbols for the values of the enum type are defined by @@ -157,37 +135,63 @@ DEFTREECODE (VECTOR_TYPE, "vector_type", tcc_type, 0) treated similarly. */ DEFTREECODE (ENUMERAL_TYPE, "enumeral_type", tcc_type, 0) -/* Pascal's boolean type (true or false are the only values); - no special fields needed. */ +/* Boolean type (true or false are the only values). Looks like an + INTEGRAL_TYPE. */ DEFTREECODE (BOOLEAN_TYPE, "boolean_type", tcc_type, 0) -/* CHAR in Pascal; not used in C. - No special fields needed. */ -DEFTREECODE (CHAR_TYPE, "char_type", tcc_type, 0) +/* Integer types in all languages, including char in C. + Also used for sub-ranges of other discrete types. + Has components TYPE_MIN_VALUE, TYPE_MAX_VALUE (expressions, inclusive) + and TYPE_PRECISION (number of bits used by this type). + In the case of a subrange type in Pascal, the TREE_TYPE + of this will point at the supertype (another INTEGER_TYPE, + or an ENUMERAL_TYPE or BOOLEAN_TYPE). + Otherwise, the TREE_TYPE is zero. */ +DEFTREECODE (INTEGER_TYPE, "integer_type", tcc_type, 0) + +/* C's float and double. Different floating types are distinguished + by machine mode and by the TYPE_SIZE and the TYPE_PRECISION. */ +DEFTREECODE (REAL_TYPE, "real_type", tcc_type, 0) + +/* The ordering of the following codes is optimized for the checking + macros in tree.h. Changing the order will degrade the speed of the + compiler. POINTER_TYPE, REFERENCE_TYPE. Note that this range + overlaps the previous range of ordered types. */ /* All pointer-to-x types have code POINTER_TYPE. The TREE_TYPE points to the node for the type pointed to. */ DEFTREECODE (POINTER_TYPE, "pointer_type", tcc_type, 0) -/* An offset is a pointer relative to an object. - The TREE_TYPE field is the type of the object at the offset. - The TYPE_OFFSET_BASETYPE points to the node for the type of object - that the offset is relative to. */ -DEFTREECODE (OFFSET_TYPE, "offset_type", tcc_type, 0) - /* A reference is like a pointer except that it is coerced automatically to the value it points to. Used in C++. */ DEFTREECODE (REFERENCE_TYPE, "reference_type", tcc_type, 0) -/* METHOD_TYPE is the type of a function which takes an extra first - argument for "self", which is not present in the declared argument list. - The TREE_TYPE is the return type of the method. The TYPE_METHOD_BASETYPE - is the type of "self". TYPE_ARG_TYPES is the real argument list, which - includes the hidden argument for "self". */ -DEFTREECODE (METHOD_TYPE, "method_type", tcc_type, 0) +/* The C++ decltype(nullptr) type. */ +DEFTREECODE (NULLPTR_TYPE, "nullptr_type", tcc_type, 0) + +/* _Fract and _Accum types in Embedded-C. Different fixed-point types + are distinguished by machine mode and by the TYPE_SIZE and the + TYPE_PRECISION. */ +DEFTREECODE (FIXED_POINT_TYPE, "fixed_point_type", tcc_type, 0) + +/* The ordering of the following codes is optimized for the checking + macros in tree.h. Changing the order will degrade the speed of the + compiler. COMPLEX_TYPE, VECTOR_TYPE, ARRAY_TYPE. */ + +/* Complex number types. The TREE_TYPE field is the data type + of the real and imaginary parts. It must be of scalar + arithmetic type, not including pointer type. */ +DEFTREECODE (COMPLEX_TYPE, "complex_type", tcc_type, 0) + +/* Vector types. The TREE_TYPE field is the data type of the vector + elements. The TYPE_PRECISION field is the number of subparts of + the vector. */ +DEFTREECODE (VECTOR_TYPE, "vector_type", tcc_type, 0) -/* Used for Pascal; details not determined right now. */ -DEFTREECODE (FILE_TYPE, "file_type", tcc_type, 0) +/* The ordering of the following codes is optimized for the checking + macros in tree.h. Changing the order will degrade the speed of the + compiler. ARRAY_TYPE, RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE. + Note that this range overlaps the previous range. */ /* Types of arrays. Special fields: TREE_TYPE Type of an array element. @@ -200,12 +204,6 @@ DEFTREECODE (FILE_TYPE, "file_type", tcc_type, 0) /* Array types in C or Pascal */ DEFTREECODE (ARRAY_TYPE, "array_type", tcc_type, 0) -/* Types of sets for Pascal. Special fields are the same as - in an array type. The target type is always a boolean type. - Used for both bitstrings and powersets in Chill; - TYPE_STRING_FLAG indicates a bitstring. */ -DEFTREECODE (SET_TYPE, "set_type", tcc_type, 0) - /* Struct in C, or record in Pascal. */ /* Special fields: TYPE_FIELDS chain of FIELD_DECLs for the fields of the struct, @@ -228,6 +226,13 @@ DEFTREECODE (UNION_TYPE, "union_type", tcc_type, 0) /* C union type */ the union. */ DEFTREECODE (QUAL_UNION_TYPE, "qual_union_type", tcc_type, 0) +/* The ordering of the following codes is optimized for the checking + macros in tree.h. Changing the order will degrade the speed of the + compiler. VOID_TYPE, FUNCTION_TYPE, METHOD_TYPE. */ + +/* The void type in C */ +DEFTREECODE (VOID_TYPE, "void_type", tcc_type, 0) + /* Type of functions. Special fields: TREE_TYPE type of value returned. TYPE_ARG_TYPES list of types of arguments expected. @@ -236,6 +241,13 @@ DEFTREECODE (QUAL_UNION_TYPE, "qual_union_type", tcc_type, 0) have code FUNCTION_TYPE also, but then TREE_TYPE is zero or void type. */ DEFTREECODE (FUNCTION_TYPE, "function_type", tcc_type, 0) +/* METHOD_TYPE is the type of a function which takes an extra first + argument for "self", which is not present in the declared argument list. + The TREE_TYPE is the return type of the method. The TYPE_METHOD_BASETYPE + is the type of "self". TYPE_ARG_TYPES is the real argument list, which + includes the hidden argument for "self". */ +DEFTREECODE (METHOD_TYPE, "method_type", tcc_type, 0) + /* This is a language-specific kind of type. Its meaning is defined by the language front end. layout_type does not know how to lay this out, @@ -249,9 +261,8 @@ DEFTREECODE (LANG_TYPE, "lang_type", tcc_type, 0) /* Contents are in TREE_INT_CST_LOW and TREE_INT_CST_HIGH fields, 32 bits each, giving us a 64 bit constant capability. INTEGER_CST nodes can be shared, and therefore should be considered read only. - They should be copied, before setting a flag such as - TREE_OVERFLOW. If an INTEGER_CST has TREE_OVERFLOW or - TREE_CONSTANT_OVERFLOW already set, it is known to be unique. + They should be copied, before setting a flag such as TREE_OVERFLOW. + If an INTEGER_CST has TREE_OVERFLOW already set, it is known to be unique. INTEGER_CST nodes are created for the integral types, for pointer types and for vector and float types in some circumstances. */ DEFTREECODE (INTEGER_CST, "integer_cst", tcc_constant, 0) @@ -259,6 +270,9 @@ DEFTREECODE (INTEGER_CST, "integer_cst", tcc_constant, 0) /* Contents are in TREE_REAL_CST field. */ DEFTREECODE (REAL_CST, "real_cst", tcc_constant, 0) +/* Contents are in TREE_FIXED_CST field. */ +DEFTREECODE (FIXED_CST, "fixed_cst", tcc_constant, 0) + /* Contents are in TREE_REALPART and TREE_IMAGPART fields, whose contents are other constant nodes. */ DEFTREECODE (COMPLEX_CST, "complex_cst", tcc_constant, 0) @@ -266,7 +280,7 @@ DEFTREECODE (COMPLEX_CST, "complex_cst", tcc_constant, 0) /* Contents are in TREE_VECTOR_CST_ELTS field. */ DEFTREECODE (VECTOR_CST, "vector_cst", tcc_constant, 0) -/* Contents are TREE_STRING_LENGTH and TREE_STRING_POINTER fields. */ +/* Contents are TREE_STRING_LENGTH and the actual contents of the string. */ DEFTREECODE (STRING_CST, "string_cst", tcc_constant, 0) /* Declarations. All references to names are represented as ..._DECL @@ -308,8 +322,8 @@ DEFTREECODE (STRING_CST, "string_cst", tcc_constant, 0) FUNCTION_DECLs use four special fields: DECL_ARGUMENTS holds a chain of PARM_DECL nodes for the arguments. - DECL_RESULT holds a RESULT_DECL node for the value of a function, - or it is 0 for a function that returns no value. + DECL_RESULT holds a RESULT_DECL node for the value of a function. + The DECL_RTL field is 0 for a function that returns no value. (C functions returning void have zero here.) The TREE_TYPE field is the type in which the result is actually returned. This is usually the same as the return type of the @@ -329,17 +343,36 @@ DEFTREECODE (STRING_CST, "string_cst", tcc_constant, 0) DEFTREECODE (FUNCTION_DECL, "function_decl", tcc_declaration, 0) DEFTREECODE (LABEL_DECL, "label_decl", tcc_declaration, 0) -DEFTREECODE (CONST_DECL, "const_decl", tcc_declaration, 0) -DEFTREECODE (TYPE_DECL, "type_decl", tcc_declaration, 0) +/* The ordering of the following codes is optimized for the checking + macros in tree.h. Changing the order will degrade the speed of the + compiler. FIELD_DECL, VAR_DECL, CONST_DECL, PARM_DECL, + TYPE_DECL. */ +DEFTREECODE (FIELD_DECL, "field_decl", tcc_declaration, 0) DEFTREECODE (VAR_DECL, "var_decl", tcc_declaration, 0) +DEFTREECODE (CONST_DECL, "const_decl", tcc_declaration, 0) DEFTREECODE (PARM_DECL, "parm_decl", tcc_declaration, 0) +DEFTREECODE (TYPE_DECL, "type_decl", tcc_declaration, 0) DEFTREECODE (RESULT_DECL, "result_decl", tcc_declaration, 0) -DEFTREECODE (FIELD_DECL, "field_decl", tcc_declaration, 0) + +/* A "declaration" of a debug temporary. It should only appear in + DEBUG stmts. */ +DEFTREECODE (DEBUG_EXPR_DECL, "debug_expr_decl", tcc_declaration, 0) /* A namespace declaration. Namespaces appear in DECL_CONTEXT of other _DECLs, providing a hierarchy of names. */ DEFTREECODE (NAMESPACE_DECL, "namespace_decl", tcc_declaration, 0) +/* A declaration import. + The C++ FE uses this to represent a using-directive; eg: + "using namespace foo". + But it could be used to represent any declaration import construct. + Whenever a declaration import appears in a lexical block, the BLOCK node + representing that lexical block in GIMPLE will contain an IMPORTED_DECL + node, linked via BLOCK_VARS accessor of the said BLOCK. + For a given NODE which code is IMPORTED_DECL, + IMPORTED_DECL_ASSOCIATED_DECL (NODE) accesses the imported declaration. */ +DEFTREECODE (IMPORTED_DECL, "imported_decl", tcc_declaration, 0) + /* A translation unit. This is not technically a declaration, since it can't be looked up, but it's close enough. */ DEFTREECODE (TRANSLATION_UNIT_DECL, "translation_unit_decl",\ @@ -347,6 +380,9 @@ DEFTREECODE (TRANSLATION_UNIT_DECL, "translation_unit_decl",\ /* References to storage. */ +/* The ordering of the following codes is optimized for the classification + in handled_component_p. Keep them in a consecutive group. */ + /* Value is structure or union component. Operand 0 is the structure or union (an expression). Operand 1 is the field (a node of type FIELD_DECL). @@ -357,14 +393,17 @@ DEFTREECODE (COMPONENT_REF, "component_ref", tcc_reference, 3) /* Reference to a group of bits within an object. Similar to COMPONENT_REF except the position is given explicitly rather than via a FIELD_DECL. Operand 0 is the structure or union expression; - operand 1 is a tree giving the number of bits being referenced; - operand 2 is a tree giving the position of the first referenced bit. - The field can be either a signed or unsigned field; - BIT_FIELD_REF_UNSIGNED says which. */ + operand 1 is a tree giving the constant number of bits being referenced; + operand 2 is a tree giving the constant position of the first referenced bit. + The result type width has to match the number of bits referenced. + If the result type is integral, its signedness specifies how it is extended + to its mode width. */ DEFTREECODE (BIT_FIELD_REF, "bit_field_ref", tcc_reference, 3) -/* C unary `*' or Pascal `^'. One operand, an expression for a pointer. */ -DEFTREECODE (INDIRECT_REF, "indirect_ref", tcc_reference, 1) +/* Used only on an operand of complex type, these return + a value of the corresponding component type. */ +DEFTREECODE (REALPART_EXPR, "realpart_expr", tcc_reference, 1) +DEFTREECODE (IMAGPART_EXPR, "imagpart_expr", tcc_reference, 1) /* Array indexing. Operand 0 is the array; operand 1 is a (single) array index. @@ -378,45 +417,33 @@ DEFTREECODE (ARRAY_REF, "array_ref", tcc_reference, 4) of the range is taken from the type of the expression. */ DEFTREECODE (ARRAY_RANGE_REF, "array_range_ref", tcc_reference, 4) -/* Used to represent lookup of runtime type dependent data. Often this is - a reference to a vtable, but it needn't be. Operands are: +/* C unary `*' or Pascal `^'. One operand, an expression for a pointer. */ +DEFTREECODE (INDIRECT_REF, "indirect_ref", tcc_reference, 1) + +/* Used to represent lookup in a virtual method table which is dependent on + the runtime type of an object. Operands are: OBJ_TYPE_REF_EXPR: An expression that evaluates the value to use. OBJ_TYPE_REF_OBJECT: Is the object on whose behalf the lookup is being performed. Through this the optimizers may be able to statically determine the dynamic type of the object. - OBJ_TYPE_REF_TOKEN: Something front-end specific used to resolve the - reference to something simpler, usually to the address of a DECL. - Never touched by the middle-end. Good choices would be either an - identifier or a vtable index. */ + OBJ_TYPE_REF_TOKEN: An integer index to the virtual method table. */ DEFTREECODE (OBJ_TYPE_REF, "obj_type_ref", tcc_expression, 3) -/* The exception object from the runtime. */ -DEFTREECODE (EXC_PTR_EXPR, "exc_ptr_expr", tcc_expression, 0) - -/* The filter object from the runtime. */ -DEFTREECODE (FILTER_EXPR, "filter_expr", tcc_expression, 0) - /* Constructor: return an aggregate value made from specified components. In C, this is used only for structure and array initializers. - Also used for SET_TYPE in Chill (and potentially Pascal). - The operand is a list of component values made out of a chain of - TREE_LIST nodes. + The operand is a sequence of component values made out of a VEC of + struct constructor_elt. For ARRAY_TYPE: - The TREE_PURPOSE of each node is the corresponding index. - If the TREE_PURPOSE is a RANGE_EXPR, it is a short-hand for many nodes, - one for each index in the range. (If the corresponding TREE_VALUE + The field INDEX of each constructor_elt is the corresponding index. + If the index is a RANGE_EXPR, it is a short-hand for many nodes, + one for each index in the range. (If the corresponding field VALUE has side-effects, they are evaluated once for each element. Wrap the value in a SAVE_EXPR if you want to evaluate side effects only once.) For RECORD_TYPE, UNION_TYPE, or QUAL_UNION_TYPE: - The TREE_PURPOSE of each node is a FIELD_DECL. - - For SET_TYPE: - The TREE_VALUE specifies a value (index) in the set that is true. - If TREE_PURPOSE is non-NULL, it specifies the lower limit of a - range of true values. Elements not listed are false (not in the set). */ -DEFTREECODE (CONSTRUCTOR, "constructor", tcc_expression, 1) + The field INDEX of each node is a FIELD_DECL. */ +DEFTREECODE (CONSTRUCTOR, "constructor", tcc_exceptional, 0) /* The expression types are mostly straightforward, with the fourth argument of DEFTREECODE saying how many operands there are. @@ -432,7 +459,8 @@ DEFTREECODE (COMPOUND_EXPR, "compound_expr", tcc_expression, 2) DEFTREECODE (MODIFY_EXPR, "modify_expr", tcc_expression, 2) /* Initialization expression. Operand 0 is the variable to initialize; - Operand 1 is the initializer. */ + Operand 1 is the initializer. This differs from MODIFY_EXPR in that any + reference to the referent of operand 0 within operand 1 is undefined. */ DEFTREECODE (INIT_EXPR, "init_expr", tcc_expression, 2) /* For TARGET_EXPR, operand 0 is the target of an initialization, @@ -450,9 +478,25 @@ DEFTREECODE (TARGET_EXPR, "target_expr", tcc_expression, 4) Operand 0 may be of any type. Operand 1 must have the same type as the entire expression, unless it unconditionally throws an exception, in which case it should - have VOID_TYPE. The same constraints apply to operand 2. */ + have VOID_TYPE. The same constraints apply to operand 2. The + condition in operand 0 must be of integral type. + + In cfg gimple, if you do not have a selection expression, operands + 1 and 2 are NULL. The operands are then taken from the cfg edges. */ DEFTREECODE (COND_EXPR, "cond_expr", tcc_expression, 3) +/* Vector conditional expression. It is like COND_EXPR, but with + vector operands. + + A = VEC_COND_EXPR ( X < Y, B, C) + + means + + for (i=0; i from the - argument list. Each tuple contains the incoming reaching - definition (SSA_NAME node) and the edge via which that definition - is coming through. */ -DEFTREECODE (PHI_NODE, "phi_node", tcc_exceptional, 0) - /* Used to represent a typed exception handler. CATCH_TYPES is the type (or list of types) handled, and CATCH_BODY is the code for the handler. */ DEFTREECODE (CATCH_EXPR, "catch_expr", tcc_statement, 2) @@ -857,11 +903,24 @@ DEFTREECODE (POLYNOMIAL_CHREC, "polynomial_chrec", tcc_expression, 3) Use the interface in tree-iterator.h to access this node. */ DEFTREECODE (STATEMENT_LIST, "statement_list", tcc_exceptional, 0) -/* Value handles. Artificial nodes to represent expressions in - partial redundancy elimination (tree-ssa-pre.c). These nodes are - used for expression canonicalization. If two expressions compute - the same value, they will be assigned the same value handle. */ -DEFTREECODE (VALUE_HANDLE, "value_handle", tcc_exceptional, 0) +/* Predicate assertion. Artificial expression generated by the optimizers + to keep track of predicate values. This expression may only appear on + the RHS of assignments. + + Given X = ASSERT_EXPR , the optimizers can infer + two things: + + 1- X is a copy of Y. + 2- EXPR is a conditional expression and is known to be true. + + Valid and to be expected forms of conditional expressions are + valid GIMPLE conditional expressions (as defined by is_gimple_condexpr) + and conditional expressions with the first operand being a + PLUS_EXPR with a variable possibly wrapped in a NOP_EXPR first + operand and an integer constant second operand. + + The type of the expression is the same as Y. */ +DEFTREECODE (ASSERT_EXPR, "assert_expr", tcc_expression, 2) /* Base class information. Holds information about a class as a baseclass of itself or another class. */ @@ -874,6 +933,233 @@ DEFTREECODE (TREE_BINFO, "tree_binfo", tcc_exceptional, 0) Operand 1 is the size of the type in the expression. */ DEFTREECODE (WITH_SIZE_EXPR, "with_size_expr", tcc_expression, 2) +/* Extract elements from two input vectors Operand 0 and Operand 1 + size VS, according to the offset OFF defined by Operand 2 as + follows: + If OFF > 0, the last VS - OFF elements of vector OP0 are concatenated to + the first OFF elements of the vector OP1. + If OFF == 0, then the returned vector is OP1. + On different targets OFF may take different forms; It can be an address, in + which case its low log2(VS)-1 bits define the offset, or it can be a mask + generated by the builtin targetm.vectorize.mask_for_load_builtin_decl. */ +DEFTREECODE (REALIGN_LOAD_EXPR, "realign_load", tcc_expression, 3) + +/* Low-level memory addressing. Operands are BASE (address of static or + global variable or register), OFFSET (integer constant), + INDEX (register), STEP (integer constant), INDEX2 (register), + The corresponding address is BASE + STEP * INDEX + INDEX2 + OFFSET. + Only variations and values valid on the target are allowed. + + The type of STEP, INDEX and INDEX2 is sizetype. + + The type of BASE is a pointer type. If BASE is not an address of + a static or global variable INDEX2 will be NULL. + + The type of OFFSET is a pointer type and determines TBAA the same as + the constant offset operand in MEM_REF. */ + +DEFTREECODE (TARGET_MEM_REF, "target_mem_ref", tcc_reference, 5) + +/* Memory addressing. Operands are a pointer and a tree constant integer + byte offset of the pointer type that when dereferenced yields the + type of the base object the pointer points into and which is used for + TBAA purposes. + The type of the MEM_REF is the type the bytes at the memory location + are interpreted as. + MEM_REF is equivalent to ((typeof(c))p)->x... where x... is a + chain of component references offsetting p by c. */ +DEFTREECODE (MEM_REF, "mem_ref", tcc_reference, 2) + +/* The ordering of the codes between OMP_PARALLEL and OMP_CRITICAL is + exposed to TREE_RANGE_CHECK. */ +/* OpenMP - #pragma omp parallel [clause1 ... clauseN] + Operand 0: OMP_PARALLEL_BODY: Code to be executed by all threads. + Operand 1: OMP_PARALLEL_CLAUSES: List of clauses. */ + +DEFTREECODE (OMP_PARALLEL, "omp_parallel", tcc_statement, 2) + +/* OpenMP - #pragma omp task [clause1 ... clauseN] + Operand 0: OMP_TASK_BODY: Code to be executed by all threads. + Operand 1: OMP_TASK_CLAUSES: List of clauses. */ + +DEFTREECODE (OMP_TASK, "omp_task", tcc_statement, 2) + +/* OpenMP - #pragma omp for [clause1 ... clauseN] + Operand 0: OMP_FOR_BODY: Loop body. + Operand 1: OMP_FOR_CLAUSES: List of clauses. + Operand 2: OMP_FOR_INIT: Initialization code of the form + VAR = N1. + Operand 3: OMP_FOR_COND: Loop conditional expression of the form + VAR { <, >, <=, >= } N2. + Operand 4: OMP_FOR_INCR: Loop index increment of the form + VAR { +=, -= } INCR. + Operand 5: OMP_FOR_PRE_BODY: Filled by the gimplifier with things + from INIT, COND, and INCR that are technically part of the + OMP_FOR structured block, but are evaluated before the loop + body begins. + + VAR must be an integer or pointer variable, which is implicitly thread + private. N1, N2 and INCR are required to be loop invariant integer + expressions that are evaluated without any synchronization. + The evaluation order, frequency of evaluation and side-effects are + unspecified by the standard. */ +DEFTREECODE (OMP_FOR, "omp_for", tcc_statement, 6) + +/* OpenMP - #pragma omp sections [clause1 ... clauseN] + Operand 0: OMP_SECTIONS_BODY: Sections body. + Operand 1: OMP_SECTIONS_CLAUSES: List of clauses. */ +DEFTREECODE (OMP_SECTIONS, "omp_sections", tcc_statement, 2) + +/* OpenMP - #pragma omp single + Operand 0: OMP_SINGLE_BODY: Single section body. + Operand 1: OMP_SINGLE_CLAUSES: List of clauses. */ +DEFTREECODE (OMP_SINGLE, "omp_single", tcc_statement, 2) + +/* OpenMP - #pragma omp section + Operand 0: OMP_SECTION_BODY: Section body. */ +DEFTREECODE (OMP_SECTION, "omp_section", tcc_statement, 1) + +/* OpenMP - #pragma omp master + Operand 0: OMP_MASTER_BODY: Master section body. */ +DEFTREECODE (OMP_MASTER, "omp_master", tcc_statement, 1) + +/* OpenMP - #pragma omp ordered + Operand 0: OMP_ORDERED_BODY: Master section body. */ +DEFTREECODE (OMP_ORDERED, "omp_ordered", tcc_statement, 1) + +/* OpenMP - #pragma omp critical [name] + Operand 0: OMP_CRITICAL_BODY: Critical section body. + Operand 1: OMP_CRITICAL_NAME: Identifier for critical section. */ +DEFTREECODE (OMP_CRITICAL, "omp_critical", tcc_statement, 2) + +/* OpenMP - #pragma omp atomic + Operand 0: The address at which the atomic operation is to be performed. + This address should be stabilized with save_expr. + Operand 1: The expression to evaluate. When the old value of the object + at the address is used in the expression, it should appear as if + build_fold_indirect_ref of the address. */ +DEFTREECODE (OMP_ATOMIC, "omp_atomic", tcc_statement, 2) + +/* OpenMP clauses. */ +DEFTREECODE (OMP_CLAUSE, "omp_clause", tcc_exceptional, 0) + +/* Reduction operations. + Operations that take a vector of elements and "reduce" it to a scalar + result (e.g. summing the elements of the vector, finding the minimum over + the vector elements, etc). + Operand 0 is a vector; the first element in the vector has the result. + Operand 1 is a vector. */ +DEFTREECODE (REDUC_MAX_EXPR, "reduc_max_expr", tcc_unary, 1) +DEFTREECODE (REDUC_MIN_EXPR, "reduc_min_expr", tcc_unary, 1) +DEFTREECODE (REDUC_PLUS_EXPR, "reduc_plus_expr", tcc_unary, 1) + +/* Widening dot-product. + The first two arguments are of type t1. + The third argument and the result are of type t2, such that t2 is at least + twice the size of t1. DOT_PROD_EXPR(arg1,arg2,arg3) is equivalent to: + tmp = WIDEN_MULT_EXPR(arg1, arg2); + arg3 = PLUS_EXPR (tmp, arg3); + or: + tmp = WIDEN_MULT_EXPR(arg1, arg2); + arg3 = WIDEN_SUM_EXPR (tmp, arg3); */ +DEFTREECODE (DOT_PROD_EXPR, "dot_prod_expr", tcc_expression, 3) + +/* Widening summation. + The first argument is of type t1. + The second argument is of type t2, such that t2 is at least twice + the size of t1. The type of the entire expression is also t2. + WIDEN_SUM_EXPR is equivalent to first widening (promoting) + the first argument from type t1 to type t2, and then summing it + with the second argument. */ +DEFTREECODE (WIDEN_SUM_EXPR, "widen_sum_expr", tcc_binary, 2) + +/* Widening multiplication. + The two arguments are of type t1. + The result is of type t2, such that t2 is at least twice + the size of t1. WIDEN_MULT_EXPR is equivalent to first widening (promoting) + the arguments from type t1 to type t2, and then multiplying them. */ +DEFTREECODE (WIDEN_MULT_EXPR, "widen_mult_expr", tcc_binary, 2) + +/* Widening multiply-accumulate. + The first two arguments are of type t1. + The third argument and the result are of type t2, such as t2 is at least + twice the size of t1. t1 and t2 must be integral or fixed-point types. + The expression is equivalent to a WIDEN_MULT_EXPR operation + of the first two operands followed by an add or subtract of the third + operand. */ +DEFTREECODE (WIDEN_MULT_PLUS_EXPR, "widen_mult_plus_expr", tcc_expression, 3) +/* This is like the above, except in the final expression the multiply result + is subtracted from t3. */ +DEFTREECODE (WIDEN_MULT_MINUS_EXPR, "widen_mult_plus_expr", tcc_expression, 3) + +/* Fused multiply-add. + All operands and the result are of the same type. No intermediate + rounding is performed after multiplying operand one with operand two + before adding operand three. */ +DEFTREECODE (FMA_EXPR, "fma_expr", tcc_expression, 3) + +/* Whole vector left/right shift in bits. + Operand 0 is a vector to be shifted. + Operand 1 is an integer shift amount in bits. */ +DEFTREECODE (VEC_LSHIFT_EXPR, "vec_lshift_expr", tcc_binary, 2) +DEFTREECODE (VEC_RSHIFT_EXPR, "vec_rshift_expr", tcc_binary, 2) + +/* Widening vector multiplication. + The two operands are vectors with N elements of size S. Multiplying the + elements of the two vectors will result in N products of size 2*S. + VEC_WIDEN_MULT_HI_EXPR computes the N/2 high products. + VEC_WIDEN_MULT_LO_EXPR computes the N/2 low products. */ +DEFTREECODE (VEC_WIDEN_MULT_HI_EXPR, "widen_mult_hi_expr", tcc_binary, 2) +DEFTREECODE (VEC_WIDEN_MULT_LO_EXPR, "widen_mult_lo_expr", tcc_binary, 2) + +/* Unpack (extract and promote/widen) the high/low elements of the input + vector into the output vector. The input vector has twice as many + elements as the output vector, that are half the size of the elements + of the output vector. This is used to support type promotion. */ +DEFTREECODE (VEC_UNPACK_HI_EXPR, "vec_unpack_hi_expr", tcc_unary, 1) +DEFTREECODE (VEC_UNPACK_LO_EXPR, "vec_unpack_lo_expr", tcc_unary, 1) + +/* Unpack (extract) the high/low elements of the input vector, convert + fixed point values to floating point and widen elements into the + output vector. The input vector has twice as many elements as the output + vector, that are half the size of the elements of the output vector. */ +DEFTREECODE (VEC_UNPACK_FLOAT_HI_EXPR, "vec_unpack_float_hi_expr", tcc_unary, 1) +DEFTREECODE (VEC_UNPACK_FLOAT_LO_EXPR, "vec_unpack_float_lo_expr", tcc_unary, 1) + +/* Pack (demote/narrow and merge) the elements of the two input vectors + into the output vector using truncation/saturation. + The elements of the input vectors are twice the size of the elements of the + output vector. This is used to support type demotion. */ +DEFTREECODE (VEC_PACK_TRUNC_EXPR, "vec_pack_trunc_expr", tcc_binary, 2) +DEFTREECODE (VEC_PACK_SAT_EXPR, "vec_pack_sat_expr", tcc_binary, 2) + +/* Convert floating point values of the two input vectors to integer + and pack (narrow and merge) the elements into the output vector. The + elements of the input vector are twice the size of the elements of + the output vector. */ +DEFTREECODE (VEC_PACK_FIX_TRUNC_EXPR, "vec_pack_fix_trunc_expr", tcc_binary, 2) + +/* Extract even/odd fields from vectors. */ +DEFTREECODE (VEC_EXTRACT_EVEN_EXPR, "vec_extracteven_expr", tcc_binary, 2) +DEFTREECODE (VEC_EXTRACT_ODD_EXPR, "vec_extractodd_expr", tcc_binary, 2) + +/* Merge input vectors interleaving their fields. */ +DEFTREECODE (VEC_INTERLEAVE_HIGH_EXPR, "vec_interleavehigh_expr", tcc_binary, 2) +DEFTREECODE (VEC_INTERLEAVE_LOW_EXPR, "vec_interleavelow_expr", tcc_binary, 2) + +/* PREDICT_EXPR. Specify hint for branch prediction. The + PREDICT_EXPR_PREDICTOR specify predictor and PREDICT_EXPR_OUTCOME the + outcome (0 for not taken and 1 for taken). Once the profile is guessed + all conditional branches leading to execution paths executing the + PREDICT_EXPR will get predicted by the specified predictor. */ +DEFTREECODE (PREDICT_EXPR, "predict_expr", tcc_expression, 1) + +/* OPTIMIZATION_NODE. Node to store the optimization options. */ +DEFTREECODE (OPTIMIZATION_NODE, "optimization_node", tcc_exceptional, 0) + +/* TARGET_OPTION_NODE. Node to store the target specific options. */ +DEFTREECODE (TARGET_OPTION_NODE, "target_option_node", tcc_exceptional, 0) + /* Local variables: mode:c