/* Register Transfer Language (RTL) definitions for GNU C-Compiler
Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
This file is part of GCC.
extern const char rtx_class[NUM_RTX_CODE];
#define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
+
+extern const unsigned char rtx_next[NUM_RTX_CODE];
\f
/* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
relative to which the offsets are calculated, as explained in rtl.def. */
unsigned int align; /* Alignment of MEM in bits. */
} mem_attrs;
+/* Structure used to describe the attributes of a REG in similar way as
+ mem_attrs does for MEM above. */
+
+typedef struct reg_attrs GTY(())
+{
+ tree decl; /* decl corresponding to REG. */
+ HOST_WIDE_INT offset; /* Offset from start of DECL. */
+} reg_attrs;
+
/* Common union for an element of an rtx. */
-typedef union rtunion_def
+union rtunion_def
{
HOST_WIDE_INT rtwint;
int rtint;
tree rttree;
struct basic_block_def *bb;
mem_attrs *rtmem;
-} rtunion;
+ reg_attrs *rtreg;
+};
+typedef union rtunion_def rtunion;
/* RTL expression ("rtx"). */
-struct rtx_def
+struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"),
+ chain_prev ("RTX_PREV (&%h)")))
{
/* The kind of expression this is. */
ENUM_BITFIELD(rtx_code) code: 16;
1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
from the target of a branch. Valid from reorg until end of compilation;
cleared before used.
- 1 in an INSN or related rtx if this insn is dead code. Valid only during
- dead-code elimination phase; cleared before use. */
+ 1 in an INSN, JUMP_INSN or CALL_INSN or related rtx if this insn is
+ dead code. Valid only during dead-code elimination phase; cleared
+ before use. */
unsigned int in_struct : 1;
/* At the end of RTL generation, 1 if this rtx is used. This is used for
copying shared structure. See `unshare_all_rtl'.
has used it as the function. */
unsigned int used : 1;
/* Nonzero if this rtx came from procedure integration.
- 1 in a REG means this reg refers to the return value
+ 1 in a REG or PARALLEL means this rtx refers to the return value
of the current function.
1 in a SYMBOL_REF if the symbol is weak. */
unsigned integrated : 1;
/* The first element of the operands of this rtx.
The number of operands and their types are controlled
by the `code' field, according to rtl.def. */
- rtunion fld[1];
+ rtunion GTY ((special ("rtx_def"),
+ desc ("GET_CODE (&%0)"))) fld[1];
};
#define NULL_RTX (rtx) 0
+/* The "next" and "previous" RTX, relative to this one. */
+
+#define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
+ : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
+
+/* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
+ */
+#define RTX_PREV(X) ((GET_CODE (X) == INSN \
+ || GET_CODE (X) == CALL_INSN \
+ || GET_CODE (X) == JUMP_INSN \
+ || GET_CODE (X) == NOTE \
+ || GET_CODE (X) == BARRIER \
+ || GET_CODE (X) == CODE_LABEL) \
+ && PREV_INSN (X) != NULL \
+ && NEXT_INSN (PREV_INSN (X)) == X \
+ ? PREV_INSN (X) : NULL)
+
/* Define macros to access the `code' field of the rtx. */
#define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
/* Predicate yielding nonzero iff X is a barrier insn. */
#define BARRIER_P(X) (GET_CODE (X) == BARRIER)
-/* Predicate yielding nonzero iff X is cc0. */
-#ifdef HAVE_cc0
-#define CC0_P(X) ((X) == cc0_rtx)
-#else
-#define CC0_P(X) 0
-#endif
-
/* Predicate yielding nonzero iff X is a data for a jump table. */
#define JUMP_TABLE_DATA_P(INSN) \
(JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
#define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').bb)
#define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
#define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
-#define X0MEMATTR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtmem)
+#define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rtmem)
+#define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rtreg)
#define XCWINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtwint)
#define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtint)
/* 1 if RTX is an insn that is dead code. Valid only for dead-code
elimination phase. */
#define INSN_DEAD_CODE_P(RTX) \
- (RTL_FLAG_CHECK1("INSN_DEAD_CODE_P", (RTX), INSN)->in_struct)
+ (RTL_FLAG_CHECK3("INSN_DEAD_CODE_P", (RTX), INSN, CALL_INSN, JUMP_INSN)->in_struct)
/* 1 if RTX is an insn in a delay slot and is from the target of the branch.
If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
#define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
#define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
#define NOTE_PREDICTION(INSN) XCINT (INSN, 4, NOTE)
+#define NOTE_PRECONDITIONED(INSN) XCINT (INSN, 4, NOTE)
/* In a NOTE that is a line number, this is the line number.
Other kinds of NOTEs are identified by negative numbers here. */
#define REGNO(RTX) XCUINT (RTX, 0, REG)
#define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
-/* 1 if RTX is a reg that is the current function's return value. */
+/* 1 if RTX is a reg or parallel that is the current function's return
+ value. */
#define REG_FUNCTION_VALUE_P(RTX) \
- (RTL_FLAG_CHECK1("REG_FUNCTION_VALUE_P", (RTX), REG)->integrated)
+ (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->integrated)
/* 1 if RTX is a reg that corresponds to a variable declared by the user. */
#define REG_USERVAR_P(RTX) \
#define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
/* For a CONST_DOUBLE:
- The usual two ints that hold the value.
- For a DImode, that is all there are;
- and CONST_DOUBLE_LOW is the low-order word and ..._HIGH the high-order.
- For a float, the number of ints varies,
- and CONST_DOUBLE_LOW is the one that should come first *in memory*.
- So use &CONST_DOUBLE_LOW(r) as the address of an array of ints. */
+ For a DImode, there are two integers CONST_DOUBLE_LOW is the
+ low-order word and ..._HIGH the high-order.
+ For a float, there is a REAL_VALUE_TYPE structure, and
+ CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
#define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE)
#define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE)
+#define CONST_DOUBLE_REAL_VALUE(r) ((struct real_value *)&CONST_DOUBLE_LOW(r))
/* For a CONST_VECTOR, return element #n. */
#define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
#define MEM_SCALAR_P(RTX) \
(RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->frame_related)
-/* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
+/* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
RTX. Otherwise, vice versa. Use this macro only when you are
*sure* that you know that the MEM is in a structure, or is a
scalar. VAL is evaluated only once. */
in the block and provide defaults if none specified. */
#define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
+/* The register attribute block. We provide access macros for each value
+ in the block and provide defaults if none specified. */
+#define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
+
/* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
set, and may alias anything. Otherwise, the MEM can only alias
MEMs in the same alias set. This value is set in a
: (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
+/* For a REG rtx, the decl it is known to refer to, if it is known to
+ refer to part of a DECL. */
+#define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
+
+/* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
+ RTX that is always a CONST_INT. */
+#define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
+
/* Copy the attributes that apply to memory locations from RHS to LHS. */
#define MEM_COPY_ATTRIBUTES(LHS, RHS) \
(MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
/* In builtins.c */
extern rtx expand_builtin_expect_jump PARAMS ((tree, rtx, rtx));
+extern void purge_builtin_constant_p PARAMS ((void));
/* In explow.c */
extern void set_stack_check_libfunc PARAMS ((rtx));
extern rtx gen_int_mode PARAMS ((HOST_WIDE_INT,
enum machine_mode));
extern rtx emit_copy_of_insn_after PARAMS ((rtx, rtx));
+extern void set_reg_attrs_from_mem PARAMS ((rtx, rtx));
+extern void set_mem_attrs_from_reg PARAMS ((rtx, rtx));
/* In rtl.c */
extern rtx rtx_alloc PARAMS ((RTX_CODE));
/* In emit-rtl.c */
extern rtvec gen_rtvec_v PARAMS ((int, rtx *));
extern rtx gen_reg_rtx PARAMS ((enum machine_mode));
+extern rtx gen_rtx_REG_offset PARAMS ((rtx, enum machine_mode,
+ unsigned int, int));
extern rtx gen_label_rtx PARAMS ((void));
extern int subreg_hard_regno PARAMS ((rtx, int));
extern rtx gen_lowpart_common PARAMS ((enum machine_mode, rtx));
#define single_set_1(I) single_set_2 (I, PATTERN (I))
extern int rtx_addr_can_trap_p PARAMS ((rtx));
+extern bool nonzero_address_p PARAMS ((rtx));
extern int rtx_unstable_p PARAMS ((rtx));
extern int rtx_varies_p PARAMS ((rtx, int));
extern int rtx_addr_varies_p PARAMS ((rtx, int));
#define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
/* This points to the Canonical Frame Address of the function. This
- should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
+ should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
but is calculated relative to the arg pointer for simplicity; the
frame pointer nor stack pointer are necessarily fixed relative to
the CFA until after reload. */
extern int invert_jump PARAMS ((rtx, rtx, int));
extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx));
extern int true_regnum PARAMS ((rtx));
+extern unsigned int reg_or_subregno PARAMS ((rtx));
extern int redirect_jump_1 PARAMS ((rtx, rtx));
extern int redirect_jump PARAMS ((rtx, rtx, int));
extern void rebuild_jump_labels PARAMS ((rtx));
/* In gcse.c */
#ifdef BUFSIZ
extern int gcse_main PARAMS ((rtx, FILE *));
+extern int bypass_jumps PARAMS ((FILE *));
#endif
/* In global.c */
extern void dump_global_regs PARAMS ((FILE *));
#endif
#ifdef HARD_CONST
+/* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
extern void retry_global_alloc PARAMS ((int, HARD_REG_SET));
#endif
extern void build_insn_chain PARAMS ((rtx));
extern void reg_scan PARAMS ((rtx, unsigned int, int));
extern void reg_scan_update PARAMS ((rtx, rtx, unsigned int));
extern void fix_register PARAMS ((const char *, int, int));
+#ifdef HARD_CONST
+extern void cannot_change_mode_set_regs PARAMS ((HARD_REG_SET *,
+ enum machine_mode,
+ unsigned int));
+#endif
+extern bool invalid_mode_change_p PARAMS ((unsigned int,
+ enum reg_class,
+ enum machine_mode));
extern int delete_null_pointer_checks PARAMS ((rtx));
extern void init_branch_prob PARAMS ((const char *));
extern void branch_prob PARAMS ((void));
extern void end_branch_prob PARAMS ((void));
-extern void output_func_start_profiler PARAMS ((void));
+extern void create_profiler PARAMS ((void));
/* In reg-stack.c */
#ifdef BUFSIZ
extern void init_alias_analysis PARAMS ((void));
extern void end_alias_analysis PARAMS ((void));
extern rtx addr_side_effect_eval PARAMS ((rtx, int, int));
+extern bool memory_modified_in_insn_p PARAMS ((rtx, rtx));
/* In sibcall.c */
typedef enum {
extern bool expensive_function_p PARAMS ((int));
/* In tracer.c */
extern void tracer PARAMS ((void));
+
+/* In calls.c */
+
+/* Nonzero if this is a call to a `const' function. */
+#define ECF_CONST 1
+/* Nonzero if this is a call to a `volatile' function. */
+#define ECF_NORETURN 2
+/* Nonzero if this is a call to malloc or a related function. */
+#define ECF_MALLOC 4
+/* Nonzero if it is plausible that this is a call to alloca. */
+#define ECF_MAY_BE_ALLOCA 8
+/* Nonzero if this is a call to a function that won't throw an exception. */
+#define ECF_NOTHROW 16
+/* Nonzero if this is a call to setjmp or a related function. */
+#define ECF_RETURNS_TWICE 32
+/* Nonzero if this is a call to `longjmp'. */
+#define ECF_LONGJMP 64
+/* Nonzero if this is a syscall that makes a new process in the image of
+ the current one. */
+#define ECF_FORK_OR_EXEC 128
+#define ECF_SIBCALL 256
+/* Nonzero if this is a call to "pure" function (like const function,
+ but may read memory. */
+#define ECF_PURE 512
+/* Nonzero if this is a call to a function that returns with the stack
+ pointer depressed. */
+#define ECF_SP_DEPRESSED 1024
+/* Nonzero if this call is known to always return. */
+#define ECF_ALWAYS_RETURN 2048
+/* Create libcall block around the call. */
+#define ECF_LIBCALL_BLOCK 4096
+
+extern int flags_from_decl_or_type PARAMS ((tree));
+
#endif /* ! GCC_RTL_H */
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