Don't use this macro to turn on various extra optimizations for
@option{-O}. That is what @code{OPTIMIZATION_OPTIONS} is for.
+
+If you need to do something whenever the optimization level is
+changed via the optimize attribute or pragma, see
+@code{TARGET_OVERRIDE_OPTIONS_AFTER_CHANGE}
@end defmac
+@deftypefn {Target Hook} void TARGET_OVERRIDE_OPTIONS_AFTER_CHANGE (void)
+This target function is similar to the macro @code{OVERRIDE_OPTIONS}
+but is called when the optimize level is changed via an attribute or
+pragma or when it is reset at the end of the code affected by the
+attribute or pragma. It is not called at the beginning of compilation
+when @code{OVERRIDE_OPTIONS} is called so if you want to perform these
+actions then, you should have @code{OVERRIDE_OPTIONS} call
+@code{TARGET_OVERRIDE_OPTIONS_AFTER_CHANGE}.
+@end deftypefn
+
@defmac C_COMMON_OVERRIDE_OPTIONS
This is similar to @code{OVERRIDE_OPTIONS} but is only used in the C
language frontends (C, Objective-C, C++, Objective-C++) and so can be
generated code.
@end defmac
-@deftypefn {Target Hook} bool TARGET_HELP (void)
+@deftypefn {Target Hook} void TARGET_HELP (void)
This hook is called in response to the user invoking
@option{--target-help} on the command line. It gives the target a
chance to display extra information on the target specific command
Do not define this macro if it would never modify @var{m}.
@end defmac
-@deftypefn {Target Hook} enum machine_mode TARGET_PROMOTE_FUNCTION_MODE (tree @var{type}, enum machine_mode @var{mode}, int *@var{punsignedp}, tree @var{funtype}, int @var{for_return})
+@deftypefn {Target Hook} {enum machine_mode} TARGET_PROMOTE_FUNCTION_MODE (const_tree @var{type}, enum machine_mode @var{mode}, int *@var{punsignedp}, const_tree @var{funtype}, int @var{for_return})
Like @code{PROMOTE_MODE}, but it is applied to outgoing function arguments or
function return values. The target hook should return the new mode
and possibly change @code{*@var{punsignedp}} if the promotion should
pattern needs to support both a 32- and a 64-bit mode.
@end defmac
-@deftypefn {Target Hook} {enum machine_mode} TARGET_LIBGCC_CMP_RETURN_MODE ()
+@deftypefn {Target Hook} {enum machine_mode} TARGET_LIBGCC_CMP_RETURN_MODE (void)
This target hook should return the mode to be used for the return value
of compare instructions expanded to libgcc calls. If not defined
@code{word_mode} is returned which is the right choice for a majority of
targets.
@end deftypefn
-@deftypefn {Target Hook} {enum machine_mode} TARGET_LIBGCC_SHIFT_COUNT_MODE ()
+@deftypefn {Target Hook} {enum machine_mode} TARGET_LIBGCC_SHIFT_COUNT_MODE (void)
This target hook should return the mode to be used for the shift count operand
of shift instructions expanded to libgcc calls. If not defined
@code{word_mode} is returned which is the right choice for a majority of
The default definition of this macro returns false for all sizes.
@end defmac
-@deftypefn {Target Hook} bool TARGET_MS_BITFIELD_LAYOUT_P (tree @var{record_type})
+@deftypefn {Target Hook} bool TARGET_MS_BITFIELD_LAYOUT_P (const_tree @var{record_type})
This target hook returns @code{true} if bit-fields in the given
@var{record_type} are to be laid out following the rules of Microsoft
Visual C/C++, namely: (i) a bit-field won't share the same storage
may affect its placement.
@end deftypefn
-@deftypefn {Target Hook} {bool} TARGET_DECIMAL_FLOAT_SUPPORTED_P (void)
+@deftypefn {Target Hook} bool TARGET_DECIMAL_FLOAT_SUPPORTED_P (void)
Returns true if the target supports decimal floating point.
@end deftypefn
-@deftypefn {Target Hook} {bool} TARGET_FIXED_POINT_SUPPORTED_P (void)
+@deftypefn {Target Hook} bool TARGET_FIXED_POINT_SUPPORTED_P (void)
Returns true if the target supports fixed-point arithmetic.
@end deftypefn
that are not actually in any insns yet, but will be later.
@end deftypefn
-@deftypefn {Target Hook} {const char *} TARGET_MANGLE_TYPE (tree @var{type})
+@deftypefn {Target Hook} {const char *} TARGET_MANGLE_TYPE (const_tree @var{type})
If your target defines any fundamental types, or any types your target
uses should be mangled differently from the default, define this hook
to return the appropriate encoding for these types as part of a C++
@end smallexample
@end defmac
-@deftypefn {Target Hook} {const enum reg_class *} TARGET_IRA_COVER_CLASSES ()
+@deftypefn {Target Hook} {const enum reg_class *} TARGET_IRA_COVER_CLASSES (void)
Return an array of cover classes for the Integrated Register Allocator
(@acronym{IRA}). Cover classes are a set of non-intersecting register
classes covering all hard registers used for register allocation
define this macro.
@end defmac
-@deftypefn {Target Hook} bool TARGET_BUILTIN_SETJMP_FRAME_VALUE ()
+@deftypefn {Target Hook} rtx TARGET_BUILTIN_SETJMP_FRAME_VALUE (void)
This target hook should return an rtx that is used to store
the address of the current frame into the built in @code{setjmp} buffer.
The default value, @code{virtual_stack_vars_rtx}, is correct for most
@code{INCOMING_FRAME_SP_OFFSET}. Which is unfortunately not usable
during virtual register instantiation.
-The default value for this macro is @code{FIRST_PARM_OFFSET (fundecl)},
+The default value for this macro is
+@code{FIRST_PARM_OFFSET (fundecl) + crtl->args.pretend_args_size},
which is correct for most machines; in general, the arguments are found
immediately before the stack frame. Note that this is not the case on
some targets that save registers into the caller's frame, such as SPARC
approach. The default value of this macro is zero.
@end defmac
-@defmac STACK_CHECK_PROBE_INTERVAL
-An integer representing the interval at which GCC must generate stack
-probe instructions. You will normally define this macro to be no larger
-than the size of the ``guard pages'' at the end of a stack area. The
-default value of 4096 is suitable for most systems.
+@defmac STACK_CHECK_PROBE_INTERVAL_EXP
+An integer specifying the interval at which GCC must generate stack probe
+instructions, defined as 2 raised to this integer. You will normally
+define this macro so that the interval be no larger than the size of
+the ``guard pages'' at the end of a stack area. The default value
+of 12 (4096-byte interval) is suitable for most systems.
@end defmac
-@defmac STACK_CHECK_PROBE_LOAD
-An integer which is nonzero if GCC should perform the stack probe
-as a load instruction and zero if GCC should use a store instruction.
-The default is zero, which is the most efficient choice on most systems.
+@defmac STACK_CHECK_MOVING_SP
+An integer which is nonzero if GCC should move the stack pointer page by page
+when doing probes. This can be necessary on systems where the stack pointer
+contains the bottom address of the memory area accessible to the executing
+thread at any point in time. In this situation an alternate signal stack
+is required in order to be able to recover from a stack overflow. The
+default value of this macro is zero.
@end defmac
@defmac STACK_CHECK_PROTECT
-The number of bytes of stack needed to recover from a stack overflow,
-for languages where such a recovery is supported. The default value of
-75 words should be adequate for most machines.
+The number of bytes of stack needed to recover from a stack overflow, for
+languages where such a recovery is supported. The default value of 75 words
+with the @code{setjmp}/@code{longjmp}-based exception handling mechanism and
+8192 bytes with other exception handling mechanisms should be adequate for
+most machines.
@end defmac
The following macros are relevant only if neither STACK_CHECK_BUILTIN
specified first since that is the preferred elimination.
@end defmac
-@deftypefn {Target Hook} bool TARGET_CAN_ELIMINATE (const int @var{from-reg}, const int @var{to-reg})
+@deftypefn {Target Hook} bool TARGET_CAN_ELIMINATE (const int @var{from_reg}, const int @var{to_reg})
This target hook should returns @code{true} if the compiler is allowed to
-try to replace register number @var{from-reg} with register number
-@var{to-reg}. This target hook need only be defined if @code{ELIMINABLE_REGS}
+try to replace register number @var{from_reg} with register number
+@var{to_reg}. This target hook need only be defined if @code{ELIMINABLE_REGS}
is defined, and will usually be @code{true}, since most of the cases
preventing register elimination are things that the compiler already
knows about.
on the stack. See the following section for other macros that
control passing certain arguments in registers.
-@deftypefn {Target Hook} bool TARGET_PROMOTE_PROTOTYPES (tree @var{fntype})
+@deftypefn {Target Hook} bool TARGET_PROMOTE_PROTOTYPES (const_tree @var{fntype})
This target hook returns @code{true} if an argument declared in a
prototype as an integral type smaller than @code{int} should actually be
passed as an @code{int}. In addition to avoiding errors in certain
a register.
@end defmac
-@deftypefn {Target Hook} bool TARGET_MUST_PASS_IN_STACK (enum machine_mode @var{mode}, tree @var{type})
+@deftypefn {Target Hook} bool TARGET_MUST_PASS_IN_STACK (enum machine_mode @var{mode}, const_tree @var{type})
This target hook should return @code{true} if we should not pass @var{type}
solely in registers. The file @file{expr.h} defines a
definition that is usually appropriate, refer to @file{expr.h} for additional
to that type.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_CALLEE_COPIES (CUMULATIVE_ARGS *@var{cum}, enum machine_mode @var{mode}, tree @var{type}, bool @var{named})
+@deftypefn {Target Hook} bool TARGET_CALLEE_COPIES (CUMULATIVE_ARGS *@var{cum}, enum machine_mode @var{mode}, const_tree @var{type}, bool @var{named})
The function argument described by the parameters to this hook is
known to be passed by reference. The hook should return true if the
function argument should be copied by the callee instead of copied
stack.
@end defmac
-@deftypefn {Target Hook} bool TARGET_SPLIT_COMPLEX_ARG (tree @var{type})
+@deftypefn {Target Hook} bool TARGET_SPLIT_COMPLEX_ARG (const_tree @var{type})
This hook should return true if parameter of type @var{type} are passed
as two scalar parameters. By default, GCC will attempt to pack complex
arguments into the target's word size. Some ABIs require complex arguments
@code{NULL_TREE}.
@end deftypefn
-@deftypefn {Target Hook} tree TARGET_GIMPLIFY_VA_ARG_EXPR (tree @var{valist}, tree @var{type}, tree *@var{pre_p}, tree *@var{post_p})
+@deftypefn {Target Hook} tree TARGET_GIMPLIFY_VA_ARG_EXPR (tree @var{valist}, tree @var{type}, gimple_seq *@var{pre_p}, gimple_seq *@var{post_p})
This hook performs target-specific gimplification of
@code{VA_ARG_EXPR}. The first two parameters correspond to the
arguments to @code{va_arg}; the latter two are as in
This section discusses the macros that control returning scalars as
values---values that can fit in registers.
-@deftypefn {Target Hook} rtx TARGET_FUNCTION_VALUE (tree @var{ret_type}, tree @var{fn_decl_or_type}, bool @var{outgoing})
+@deftypefn {Target Hook} rtx TARGET_FUNCTION_VALUE (const_tree @var{ret_type}, const_tree @var{fn_decl_or_type}, bool @var{outgoing})
Define this to return an RTX representing the place where a function
returns or receives a value of data type @var{ret_type}, a tree node
saving and restoring an arbitrary return value.
@end defmac
-@deftypefn {Target Hook} bool TARGET_RETURN_IN_MSB (tree @var{type})
+@deftypefn {Target Hook} bool TARGET_RETURN_IN_MSB (const_tree @var{type})
This hook should return true if values of type @var{type} are returned
at the most significant end of a register (in other words, if they are
padded at the least significant end). You can assume that @var{type}
This section describes how to control returning structure values in
memory.
-@deftypefn {Target Hook} bool TARGET_RETURN_IN_MEMORY (tree @var{type}, tree @var{fntype})
+@deftypefn {Target Hook} bool TARGET_RETURN_IN_MEMORY (const_tree @var{type}, const_tree @var{fntype})
This target hook should return a nonzero value to say to return the
function value in memory, just as large structures are always returned.
Here @var{type} will be the data type of the value, and @var{fntype}
@findex current_function_pops_args
Your definition of the macro @code{RETURN_POPS_ARGS} decides which
functions pop their own arguments. @code{TARGET_ASM_FUNCTION_EPILOGUE}
-needs to know what was decided. The variable that is called
-@code{current_function_pops_args} is the number of bytes of its
-arguments that a function should pop. @xref{Scalar Return}.
-@c what is the "its arguments" in the above sentence referring to, pray
-@c tell? --mew 5feb93
+needs to know what was decided. The number of bytes of the current
+function's arguments that this function should pop is available in
+@code{crtl->args.pops_args}. @xref{Scalar Return}.
@end deftypefn
@itemize @bullet
not support varargs.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_ASM_CAN_OUTPUT_MI_THUNK (tree @var{thunk_fndecl}, HOST_WIDE_INT @var{delta}, HOST_WIDE_INT @var{vcall_offset}, tree @var{function})
+@deftypefn {Target Hook} bool TARGET_ASM_CAN_OUTPUT_MI_THUNK (const_tree @var{thunk_fndecl}, HOST_WIDE_INT @var{delta}, HOST_WIDE_INT @var{vcall_offset}, const_tree @var{function})
A function that returns true if TARGET_ASM_OUTPUT_MI_THUNK would be able
to output the assembler code for the thunk function specified by the
arguments it is passed, and false otherwise. In the latter case, the
may vary greatly between different architectures.
@end deftypefn
-@deftypefn {Target Hook} void TARGET_EXTRA_LIVE_ON_ENTRY (bitmap *@var{regs})
+@deftypefn {Target Hook} void TARGET_EXTRA_LIVE_ON_ENTRY (bitmap @var{regs})
Add any hard registers to @var{regs} that are live on entry to the
function. This hook only needs to be defined to provide registers that
cannot be found by examination of FUNCTION_ARG_REGNO_P, the callee saved
then all arguments are treated as named. Otherwise, all named arguments
except the last are treated as named.
-You need not define this hook if it always returns zero.
+You need not define this hook if it always returns @code{false}.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_PRETEND_OUTGOING_VARARGS_NAMED
+@deftypefn {Target Hook} bool TARGET_PRETEND_OUTGOING_VARARGS_NAMED (CUMULATIVE_ARGS *@var{ca})
If you need to conditionally change ABIs so that one works with
@code{TARGET_SETUP_INCOMING_VARARGS}, but the other works like neither
@code{TARGET_SETUP_INCOMING_VARARGS} nor @code{TARGET_STRICT_ARGUMENT_NAMING} was
are ABI-mandated names that the compiler should provide.
@end defmac
-@findex init_one_libfunc
@findex set_optab_libfunc
+@findex init_one_libfunc
@deftypefn {Target Hook} void TARGET_INIT_LIBFUNCS (void)
This hook should declare additional library routines or rename
existing ones, using the functions @code{set_optab_libfunc} and
accept.
@end defmac
-@deftypefn {Target Hook} TARGET_LEGITIMATE_ADDRESS_P (enum machine_mode @var{mode}, rtx @var{x}, bool @var{strict})
+@deftypefn {Target Hook} bool TARGET_LEGITIMATE_ADDRESS_P (enum machine_mode @var{mode}, rtx @var{x}, bool @var{strict})
A function that returns whether @var{x} (an RTX) is a legitimate memory
address on the target machine for a memory operand of mode @var{mode}.
Legitimate addresses are defined in two variants: a strict variant and a
-non-strict one. The @code{strict} parameter chooses which variant is
+non-strict one. The @var{strict} parameter chooses which variant is
desired by the caller.
The strict variant is used in the reload pass. It must be defined so
of TLS symbols for various targets.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_USE_BLOCKS_FOR_CONSTANT_P (enum machine_mode @var{mode}, rtx @var{x})
+@deftypefn {Target Hook} bool TARGET_USE_BLOCKS_FOR_CONSTANT_P (enum machine_mode @var{mode}, const_rtx @var{x})
This hook should return true if pool entries for constant @var{x} can
be placed in an @code{object_block} structure. @var{mode} is the mode
of @var{x}.
The default version returns false for all constants.
@end deftypefn
-@deftypefn {Target Hook} tree TARGET_BUILTIN_RECIPROCAL (enum tree_code @var{fn}, bool @var{tm_fn}, bool @var{sqrt})
+@deftypefn {Target Hook} tree TARGET_BUILTIN_RECIPROCAL (unsigned @var{fn}, bool @var{md_fn}, bool @var{sqrt})
This hook should return the DECL of a function that implements reciprocal of
the builtin function with builtin function code @var{fn}, or
-@code{NULL_TREE} if such a function is not available. @var{tm_fn} is true
+@code{NULL_TREE} if such a function is not available. @var{md_fn} is true
when @var{fn} is a code of a machine-dependent builtin function. When
@var{sqrt} is true, additional optimizations that apply only to the reciprocal
of a square root function are performed, and only reciprocals of @code{sqrt}
argument types should be @var{vec_type_in}.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_SUPPORT_VECTOR_MISALIGNMENT (enum machine_mode @var{mode}, tree @var{type}, int @var{misalignment}, bool @var{is_packed})
+@deftypefn {Target Hook} bool TARGET_SUPPORT_VECTOR_MISALIGNMENT (enum machine_mode @var{mode}, const_tree @var{type}, int @var{misalignment}, bool @var{is_packed})
This hook should return true if the target supports misaligned vector
store/load of a specific factor denoted in the @var{misalignment}
parameter. The vector store/load should be of machine mode @var{mode} and
is @code{NULL}, which disables the use of section anchors altogether.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_USE_ANCHORS_FOR_SYMBOL_P (rtx @var{x})
+@deftypefn {Target Hook} bool TARGET_USE_ANCHORS_FOR_SYMBOL_P (const_rtx @var{x})
Return true if GCC should attempt to use anchors to access @code{SYMBOL_REF}
@var{x}. You can assume @samp{SYMBOL_REF_HAS_BLOCK_INFO_P (@var{x})} and
@samp{!SYMBOL_REF_ANCHOR_P (@var{x})}.
@end smallexample
@end defmac
-@deftypefn {Target Hook} bool TARGET_FIXED_CONDITION_CODE_REGS (unsigned int *, unsigned int *)
+@deftypefn {Target Hook} bool TARGET_FIXED_CONDITION_CODE_REGS (unsigned int *@var{p1}, unsigned int *@var{p2})
On targets which do not use @code{(cc0)}, and which use a hard
register rather than a pseudo-register to hold condition codes, the
regular CSE passes are often not able to identify cases in which the
to enable this pass, and it should set the integers to which its
arguments point to the hard register numbers used for condition codes.
When there is only one such register, as is true on most systems, the
-integer pointed to by the second argument should be set to
+integer pointed to by @var{p2} should be set to
@code{INVALID_REGNUM}.
The default version of this hook returns false.
@end deftypefn
-@deftypefn {Target Hook} enum machine_mode TARGET_CC_MODES_COMPATIBLE (enum machine_mode, enum machine_mode)
+@deftypefn {Target Hook} {enum machine_mode} TARGET_CC_MODES_COMPATIBLE (enum machine_mode @var{m1}, enum machine_mode @var{m2})
On targets which use multiple condition code modes in class
@code{MODE_CC}, it is sometimes the case that a comparison can be
validly done in more than one mode. On such a system, define this
@samp{TARGET_SCHED_REORDER2}.
@end deftypefn
-@deftypefn {Target Hook} int TARGET_SCHED_REORDER2 (FILE *@var{file}, int @var{verbose}, rtx *@var{ready}, int *@var{n_ready}, @var{clock})
+@deftypefn {Target Hook} int TARGET_SCHED_REORDER2 (FILE *@var{file}, int @var{verbose}, rtx *@var{ready}, int *@var{n_readyp}, int @var{clock})
Like @samp{TARGET_SCHED_REORDER}, but called at a different time. That
function is called whenever the scheduler starts a new cycle. This one
is called once per iteration over a cycle, immediately after
@var{verbose} is the verbose level provided by @option{-fsched-verbose-@var{n}}.
@end deftypefn
-@deftypefn {Target Hook} int TARGET_SCHED_DFA_PRE_CYCLE_INSN (void)
+@deftypefn {Target Hook} rtx TARGET_SCHED_DFA_PRE_CYCLE_INSN (void)
The hook returns an RTL insn. The automaton state used in the
pipeline hazard recognizer is changed as if the insn were scheduled
when the new simulated processor cycle starts. Usage of the hook may
The hook can be used to initialize data used by the previous hook.
@end deftypefn
-@deftypefn {Target Hook} int TARGET_SCHED_DFA_POST_CYCLE_INSN (void)
+@deftypefn {Target Hook} rtx TARGET_SCHED_DFA_POST_CYCLE_INSN (void)
The hook is analogous to @samp{TARGET_SCHED_DFA_PRE_CYCLE_INSN} but used
to changed the state as if the insn were scheduled when the new
simulated processor cycle finishes.
used to initialize data used by the previous hook.
@end deftypefn
-@deftypefn {Target Hook} void TARGET_SCHED_DFA_PRE_CYCLE_ADVANCE (void)
+@deftypefn {Target Hook} void TARGET_SCHED_DFA_PRE_ADVANCE_CYCLE (void)
The hook to notify target that the current simulated cycle is about to finish.
The hook is analogous to @samp{TARGET_SCHED_DFA_PRE_CYCLE_INSN} but used
to change the state in more complicated situations - e.g., when advancing
state on a single insn is not enough.
@end deftypefn
-@deftypefn {Target Hook} void TARGET_SCHED_DFA_POST_CYCLE_ADVANCE (void)
+@deftypefn {Target Hook} void TARGET_SCHED_DFA_POST_ADVANCE_CYCLE (void)
The hook to notify target that new simulated cycle has just started.
The hook is analogous to @samp{TARGET_SCHED_DFA_POST_CYCLE_INSN} but used
to change the state in more complicated situations - e.g., when advancing
The default is no multipass scheduling.
@end deftypefn
-@deftypefn {Target Hook} int TARGET_SCHED_FIRST_CYCLE_MULTIPASS_DFA_LOOKAHEAD_GUARD (rtx)
+@deftypefn {Target Hook} int TARGET_SCHED_FIRST_CYCLE_MULTIPASS_DFA_LOOKAHEAD_GUARD (rtx @var{insn})
This hook controls what insns from the ready insn queue will be
considered for the multipass insn scheduling. If the hook returns
-zero for insn passed as the parameter, the insn will be not chosen to
+zero for @var{insn}, the insn will be not chosen to
be issued.
The default is that any ready insns can be chosen to be issued.
issued and the current processor cycle.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_SCHED_IS_COSTLY_DEPENDENCE (struct dep_def *@var{_dep}, int @var{cost}, int @var{distance})
+@deftypefn {Target Hook} bool TARGET_SCHED_IS_COSTLY_DEPENDENCE (struct _dep *@var{_dep}, int @var{cost}, int @var{distance})
This hook is used to define which dependences are considered costly by
the target, so costly that it is not advisable to schedule the insns that
are involved in the dependence too close to one another. The parameters
to this hook are as follows: The first parameter @var{_dep} is the dependence
being evaluated. The second parameter @var{cost} is the cost of the
-dependence, and the third
+dependence as estimated by the scheduler, and the third
parameter @var{distance} is the distance in cycles between the two insns.
The hook returns @code{true} if considering the distance between the two
insns the dependence between them is considered costly by the target,
that will be formed, and (c) correctly emulating the grouping can be very
important. In such targets one may want to allow issuing dependent insns
closer to one another---i.e., closer than the dependence distance; however,
-not in cases of "costly dependences", which this hooks allows to define.
+not in cases of ``costly dependences'', which this hooks allows to define.
@end deftypefn
@deftypefn {Target Hook} void TARGET_SCHED_H_I_D_EXTENDED (void)
per instruction data structures.
@end deftypefn
-@deftypefn {Target Hook} void * TARGET_SCHED_ALLOC_SCHED_CONTEXT (void)
+@deftypefn {Target Hook} {void *} TARGET_SCHED_ALLOC_SCHED_CONTEXT (void)
Return a pointer to a store large enough to hold target scheduling context.
@end deftypefn
@deftypefn {Target Hook} void TARGET_SCHED_INIT_SCHED_CONTEXT (void *@var{tc}, bool @var{clean_p})
Initialize store pointed to by @var{tc} to hold target scheduling context.
It @var{clean_p} is true then initialize @var{tc} as if scheduler is at the
-beginning of the block. Otherwise, make a copy of the current context in
-@var{tc}.
+beginning of the block. Otherwise, copy the current context into @var{tc}.
@end deftypefn
@deftypefn {Target Hook} void TARGET_SCHED_SET_SCHED_CONTEXT (void *@var{tc})
-Copy target scheduling context pointer to by @var{tc} to the current context.
-@end deftypefn
-
-@deftypefn {Target Hook} void TARGET_SCHED_CLEAR_SCHED_CONTEXT (void *@var{tc})
-Deallocate internal data in target scheduling context pointed to by @var{tc}.
-@end deftypefn
-
-@deftypefn {Target Hook} void TARGET_SCHED_FREE_SCHED_CONTEXT (void *@var{tc})
-Deallocate a store for target scheduling context pointed to by @var{tc}.
-@end deftypefn
-
-@deftypefn {Target Hook} void * TARGET_SCHED_ALLOC_SCHED_CONTEXT (void)
-Return a pointer to a store large enough to hold target scheduling context.
-@end deftypefn
-
-@deftypefn {Target Hook} void TARGET_SCHED_INIT_SCHED_CONTEXT (void *@var{tc}, bool @var{clean_p})
-Initialize store pointed to by @var{tc} to hold target scheduling context.
-It @var{clean_p} is true then initialize @var{tc} as if scheduler is at the
-beginning of the block. Otherwise, make a copy of the current context in
-@var{tc}.
-@end deftypefn
-
-@deftypefn {Target Hook} void TARGET_SCHED_SET_SCHED_CONTEXT (void *@var{tc})
-Copy target scheduling context pointer to by @var{tc} to the current context.
+Copy target scheduling context pointed to by @var{tc} to the current context.
@end deftypefn
@deftypefn {Target Hook} void TARGET_SCHED_CLEAR_SCHED_CONTEXT (void *@var{tc})
the generated speculative pattern.
@end deftypefn
-@deftypefn {Target Hook} int TARGET_SCHED_NEEDS_BLOCK_P (rtx @var{insn})
+@deftypefn {Target Hook} bool TARGET_SCHED_NEEDS_BLOCK_P (int @var{dep_status})
This hook is called by the insn scheduler during generation of recovery code
-for @var{insn}. It should return nonzero, if the corresponding check
-instruction should branch to recovery code, or zero otherwise.
+for @var{insn}. It should return @code{true}, if the corresponding check
+instruction should branch to recovery code, or @code{false} otherwise.
@end deftypefn
-@deftypefn {Target Hook} rtx TARGET_SCHED_GEN_CHECK (rtx @var{insn}, rtx @var{label}, int @var{mutate_p})
+@deftypefn {Target Hook} rtx TARGET_SCHED_GEN_SPEC_CHECK (rtx @var{insn}, rtx @var{label}, int @var{mutate_p})
This hook is called by the insn scheduler to generate a pattern for recovery
check instruction. If @var{mutate_p} is zero, then @var{insn} is a
speculative instruction for which the check should be generated.
is nearly full.
@end deftypefn
-@deftypefn {Target Hook} void TARGET_SCHED_SET_SCHED_FLAGS (unsigned int *@var{flags}, spec_info_t @var{spec_info})
+@deftypefn {Target Hook} void TARGET_SCHED_SET_SCHED_FLAGS (struct spec_info_def *@var{spec_info})
This hook is used by the insn scheduler to find out what features should be
-enabled/used. @var{flags} initially may have either the SCHED_RGN or SCHED_EBB
-bit set. This denotes the scheduler pass for which the data should be
-provided. The target backend should modify @var{flags} by modifying
-the bits corresponding to the following features: USE_DEPS_LIST, USE_GLAT,
-DETACH_LIFE_INFO, and DO_SPECULATION@. For the DO_SPECULATION feature
-an additional structure @var{spec_info} should be filled by the target.
+enabled/used.
+The structure *@var{spec_info} should be filled in by the target.
The structure describes speculation types that can be used in the scheduler.
@end deftypefn
described below.
@end deftypefn
-@deftypefn {Target Hook} TARGET_ASM_RELOC_RW_MASK (void)
+@deftypefn {Target Hook} int TARGET_ASM_RELOC_RW_MASK (void)
Return a mask describing how relocations should be treated when
selecting sections. Bit 1 should be set if global relocations
should be placed in a read-write section; bit 0 should be set if
else in @code{readonly_data_section}.
@end deftypefn
-@deftypefn {Target Hook} void TARGET_MANGLE_DECL_ASSEMBLER_NAME (tree @var{decl}, tree @var{id})
+@deftypefn {Target Hook} tree TARGET_MANGLE_DECL_ASSEMBLER_NAME (tree @var{decl}, tree @var{id})
Define this hook if you need to postprocess the assembler name generated
by target-independent code. The @var{id} provided to this hook will be
the computed name (e.g., the macro @code{DECL_NAME} of the @var{decl} in C,
before overriding it.
@end deftypefn
-@deftypefn {Target Hook} const char *TARGET_STRIP_NAME_ENCODING (const char *name)
+@deftypefn {Target Hook} {const char *} TARGET_STRIP_NAME_ENCODING (const char *@var{name})
Decode @var{name} and return the real name part, sans
the characters that @code{TARGET_ENCODE_SECTION_INFO}
may have added.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_IN_SMALL_DATA_P (tree @var{exp})
+@deftypefn {Target Hook} bool TARGET_IN_SMALL_DATA_P (const_tree @var{exp})
Returns true if @var{exp} should be placed into a ``small data'' section.
The default version of this hook always returns false.
@end deftypefn
``small data'' into a separate section. The default value is false.
@end deftypevr
-@deftypefn {Target Hook} bool TARGET_BINDS_LOCAL_P (tree @var{exp})
+@deftypefn {Target Hook} bool TARGET_BINDS_LOCAL_P (const_tree @var{exp})
Returns true if @var{exp} names an object for which name resolution
rules must resolve to the current ``module'' (dynamic shared library
or executable image).
@c prevent bad page break with this line
This describes the overall framework of an assembly file.
-@deftypefn {Target Hook} void TARGET_ASM_FILE_START ()
@findex default_file_start
+@deftypefn {Target Hook} void TARGET_ASM_FILE_START (void)
Output to @code{asm_out_file} any text which the assembler expects to
find at the beginning of a file. The default behavior is controlled
by two flags, documented below. Unless your target's assembler is
this to be done. The default is false.
@end deftypevr
-@deftypefn {Target Hook} void TARGET_ASM_FILE_END ()
+@deftypefn {Target Hook} void TARGET_ASM_FILE_END (void)
Output to @code{asm_out_file} any text which the assembler expects
to find at the end of a file. The default is to output nothing.
@end deftypefn
macro is not defined, nothing is output for a @samp{#ident} directive.
@end defmac
-@deftypefn {Target Hook} void TARGET_ASM_NAMED_SECTION (const char *@var{name}, unsigned int @var{flags}, unsigned int @var{align})
+@deftypefn {Target Hook} void TARGET_ASM_NAMED_SECTION (const char *@var{name}, unsigned int @var{flags}, tree @var{decl})
Output assembly directives to switch to section @var{name}. The section
should have attributes as specified by @var{flags}, which is a bit mask
-of the @code{SECTION_*} flags defined in @file{output.h}. If @var{align}
-is nonzero, it contains an alignment in bytes to be used for the section,
-otherwise some target default should be used. Only targets that must
-specify an alignment within the section directive need pay attention to
-@var{align} -- we will still use @code{ASM_OUTPUT_ALIGN}.
+of the @code{SECTION_*} flags defined in @file{output.h}. If @var{decl}
+is non-NULL, it is the @code{VAR_DECL} or @code{FUNCTION_DECL} with which
+this section is associated.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_HAVE_NAMED_SECTIONS
+@deftypevr {Target Hook} bool TARGET_HAVE_NAMED_SECTIONS
This flag is true if the target supports @code{TARGET_ASM_NAMED_SECTION}.
-@end deftypefn
+@end deftypevr
@anchor{TARGET_HAVE_SWITCHABLE_BSS_SECTIONS}
-@deftypefn {Target Hook} bool TARGET_HAVE_SWITCHABLE_BSS_SECTIONS
+@deftypevr {Target Hook} bool TARGET_HAVE_SWITCHABLE_BSS_SECTIONS
This flag is true if we can create zeroed data by switching to a BSS
section and then using @code{ASM_OUTPUT_SKIP} to allocate the space.
This is true on most ELF targets.
-@end deftypefn
+@end deftypevr
@deftypefn {Target Hook} {unsigned int} TARGET_SECTION_TYPE_FLAGS (tree @var{decl}, const char *@var{name}, int @var{reloc})
Choose a set of section attributes for use by @code{TARGET_ASM_NAMED_SECTION}
set via @code{__attribute__}.
@end deftypefn
-@deftypefn {Target Hook} {int} TARGET_ASM_RECORD_GCC_SWITCHES (print_switch_type @var{type}, const char * @var{text})
+@deftypefn {Target Hook} int TARGET_ASM_RECORD_GCC_SWITCHES (print_switch_type @var{type}, const char *@var{text})
Provides the target with the ability to record the gcc command line
switches that have been passed to the compiler, and options that are
enabled. The @var{type} argument specifies what is being recorded.
hook.
@end deftypefn
-@deftypefn {Target Hook} {const char *} TARGET_ASM_RECORD_GCC_SWITCHES_SECTION
+@deftypevr {Target Hook} {const char *} TARGET_ASM_RECORD_GCC_SWITCHES_SECTION
This is the name of the section that will be created by the example
ELF implementation of the @code{TARGET_ASM_RECORD_GCC_SWITCHES} target
hook.
-@end deftypefn
+@end deftypevr
@need 2000
@node Data Output
be emitted as one-only.
@end defmac
-@deftypefn {Target Hook} void TARGET_ASM_ASSEMBLE_VISIBILITY (tree @var{decl}, const char *@var{visibility})
+@deftypefn {Target Hook} void TARGET_ASM_ASSEMBLE_VISIBILITY (tree @var{decl}, int @var{visibility})
This target hook is a function to output to @var{asm_out_file} some
commands that will make the symbol(s) associated with @var{decl} have
hidden, protected or internal visibility as specified by @var{visibility}.
library function is given by @var{symref}, which is a @code{symbol_ref}.
@end deftypefn
-@deftypefn {Target Hook} void TARGET_ASM_MARK_DECL_PRESERVED (tree @var{decl})
+@deftypefn {Target Hook} void TARGET_ASM_MARK_DECL_PRESERVED (const char *@var{symbol})
This target hook is a function to output to @var{asm_out_file} an assembler
-directive to annotate used symbol. Darwin target use .no_dead_code_strip
-directive.
+directive to annotate @var{symbol} as used. The Darwin target uses the
+.no_dead_code_strip directive.
@end deftypefn
@defmac ASM_OUTPUT_LABELREF (@var{stream}, @var{name})
encountering an @code{init_priority} attribute.
@end defmac
-@deftypefn {Target Hook} bool TARGET_HAVE_CTORS_DTORS
+@deftypevr {Target Hook} bool TARGET_HAVE_CTORS_DTORS
This value is true if the target supports some ``native'' method of
collecting constructors and destructors to be run at startup and exit.
It is false if we must use @command{collect2}.
-@end deftypefn
+@end deftypevr
@deftypefn {Target Hook} void TARGET_ASM_CONSTRUCTOR (rtx @var{symbol}, int @var{priority})
If defined, a function that outputs assembler code to arrange to call
If this macro is not defined, it is equivalent to a null statement.
@end defmac
-@deftypefn {Target Hook} void TARGET_ASM_FINAL_POSTSCAN_INSN (FILE *@var{FILE}, rtx @var{insn}, rtx *@var{opvec}, int @var{noperands})
+@deftypefn {Target Hook} void TARGET_ASM_FINAL_POSTSCAN_INSN (FILE *@var{file}, rtx @var{insn}, rtx *@var{opvec}, int @var{noperands})
If defined, this target hook is a function which is executed just after the
output of assembler code for @var{insn}, to change the mode of the assembler
if necessary.
the jump-table.
@end defmac
-@deftypefn {Target Hook} void TARGET_ASM_EMIT_UNWIND_LABEL (@var{stream}, @var{decl}, @var{for_eh}, @var{empty})
+@deftypefn {Target Hook} void TARGET_ASM_EMIT_UNWIND_LABEL (FILE *@var{stream}, tree @var{decl}, int @var{for_eh}, int @var{empty})
This target hook emits a label at the beginning of each FDE@. It
should be defined on targets where FDEs need special labels, and it
should write the appropriate label, for the FDE associated with the
The default is that FDEs are not given nonlocal labels.
@end deftypefn
-@deftypefn {Target Hook} void TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL (@var{stream})
+@deftypefn {Target Hook} void TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL (FILE *@var{stream})
This target hook emits a label at the beginning of the exception table.
It should be defined on targets where it is desirable for the table
to be broken up according to function.
The default is that no label is emitted.
@end deftypefn
-@deftypefn {Target Hook} void TARGET_UNWIND_EMIT (FILE * @var{stream}, rtx @var{insn})
-This target hook emits and assembly directives required to unwind the
+@deftypefn {Target Hook} void TARGET_UNWIND_EMIT (FILE *@var{stream}, rtx @var{insn})
+This target hook emits assembly directives required to unwind the
given instruction. This is only used when TARGET_UNWIND_INFO is set.
@end deftypefn
reference to be output using the normal Dwarf2 routines.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_ARM_EABI_UNWINDER
-This hook should be set to @code{true} on targets that use an ARM EABI
+@deftypevr {Target Hook} bool TARGET_ARM_EABI_UNWINDER
+This flag should be set to @code{true} on targets that use an ARM EABI
based unwinding library, and @code{false} on other targets. This effects
the format of unwinding tables, and how the unwinder in entered after
running a cleanup. The default is @code{false}.
-@end deftypefn
+@end deftypevr
@node Alignment Output
@subsection Assembler Commands for Alignment
Define this macro if GCC should produce dwarf version 2 format
debugging output in response to the @option{-g} option.
-@deftypefn {Target Hook} int TARGET_DWARF_CALLING_CONVENTION (tree @var{function})
+@deftypefn {Target Hook} int TARGET_DWARF_CALLING_CONVENTION (const_tree @var{function})
Define this to enable the dwarf attribute @code{DW_AT_calling_convention} to
be emitted for each function. Instead of an integer return the enum
value for the @code{DW_CC_} tag.
is referenced by a function.
@end defmac
-@deftypefn {Target Hook} void TARGET_ASM_OUTPUT_DWARF_DTPREL (FILE *@var{FILE}, int @var{size}, rtx @var{x})
+@deftypefn {Target Hook} void TARGET_ASM_OUTPUT_DWARF_DTPREL (FILE *@var{file}, int @var{size}, rtx @var{x})
If defined, this target hook is a function which outputs a DTP-relative
reference to the given TLS symbol of the specified size.
@end deftypefn
take.
@end deftypevr
-@deftypefn {Target Hook} int TARGET_COMP_TYPE_ATTRIBUTES (tree @var{type1}, tree @var{type2})
+@deftypefn {Target Hook} int TARGET_COMP_TYPE_ATTRIBUTES (const_tree @var{type1}, const_tree @var{type2})
If defined, this target hook is a function which returns zero if the attributes on
@var{type1} and @var{type2} are incompatible, one if they are compatible,
and two if they are nearly compatible (which causes a warning to be
@deftypefn {Target Hook} void TARGET_SET_DEFAULT_TYPE_ATTRIBUTES (tree @var{type})
If defined, this target hook is a function which assigns default attributes to
-newly defined @var{type}.
+the newly defined @var{type}.
@end deftypefn
@deftypefn {Target Hook} tree TARGET_MERGE_TYPE_ATTRIBUTES (tree @var{type1}, tree @var{type2})
@file{i386/i386.c}, for example.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_VALID_DLLIMPORT_ATTRIBUTE_P (tree @var{decl})
+@deftypefn {Target Hook} bool TARGET_VALID_DLLIMPORT_ATTRIBUTE_P (const_tree @var{decl})
@var{decl} is a variable or function with @code{__attribute__((dllimport))}
specified. Use this hook if the target needs to add extra validation
checks to @code{handle_dll_attribute}.
target specific attribute attached to it, it will not be inlined.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_VALID_OPTION_ATTRIBUTE_P (tree @var{fndecl}, tree @var{name}, tree @var{args}, int @var{flags})
+@deftypefn {Target Hook} bool TARGET_OPTION_VALID_ATTRIBUTE_P (tree @var{fndecl}, tree @var{name}, tree @var{args}, int @var{flags})
This hook is called to parse the @code{attribute(option("..."))}, and
it allows the function to set different target machine compile time
options for the current function that might be different than the
function specific options.
@end deftypefn
-@deftypefn {Target Hook} void TARGET_OPTION_PRINT (struct cl_target_option *@var{ptr})
+@deftypefn {Target Hook} void TARGET_OPTION_PRINT (FILE *@var{file}, int @var{indent}, struct cl_target_option *@var{ptr})
This hook is called to print any additional target specific
information in the @var{struct cl_target_option} structure for
function specific options.
initializer. The default initializes libgcc's emulated TLS control object.
@end deftypefn
-@deftypevr {Target Hook} {bool} TARGET_EMUTLS_VAR_ALIGN_FIXED
+@deftypevr {Target Hook} bool TARGET_EMUTLS_VAR_ALIGN_FIXED
Specifies whether the alignment of TLS control variable objects is
fixed and should not be increased as some backends may do to optimize
single objects. The default is false.
@end deftypevr
-@deftypevr {Target Hook} {bool} TARGET_EMUTLS_DEBUG_FORM_TLS_ADDRESS
+@deftypevr {Target Hook} bool TARGET_EMUTLS_DEBUG_FORM_TLS_ADDRESS
Specifies whether a DWARF @code{DW_OP_form_tls_address} location descriptor
may be used to describe emulated TLS control objects.
@end deftypevr
@section Parameters for Precompiled Header Validity Checking
@cindex parameters, precompiled headers
-@deftypefn {Target Hook} void *TARGET_GET_PCH_VALIDITY (size_t *@var{sz})
-This hook returns the data needed by @code{TARGET_PCH_VALID_P} and sets
+@deftypefn {Target Hook} {void *} TARGET_GET_PCH_VALIDITY (size_t *@var{sz})
+This hook returns a pointer to the data needed by
+@code{TARGET_PCH_VALID_P} and sets
@samp{*@var{sz}} to the size of the data in bytes.
@end deftypefn
-@deftypefn {Target Hook} const char *TARGET_PCH_VALID_P (const void *@var{data}, size_t @var{sz})
+@deftypefn {Target Hook} {const char *} TARGET_PCH_VALID_P (const void *@var{data}, size_t @var{sz})
This hook checks whether the options used to create a PCH file are
compatible with the current settings. It returns @code{NULL}
if so and a suitable error message if not. Error messages will
suitable for most targets.
@end deftypefn
-@deftypefn {Target Hook} const char *TARGET_CHECK_PCH_TARGET_FLAGS (int @var{pch_flags})
+@deftypefn {Target Hook} {const char *} TARGET_CHECK_PCH_TARGET_FLAGS (int @var{pch_flags})
If this hook is nonnull, the default implementation of
@code{TARGET_PCH_VALID_P} will use it to check for compatible values
of @code{target_flags}. @var{pch_flags} specifies the value that
@deftypefn {Target Hook} bool TARGET_CXX_GUARD_MASK_BIT (void)
This hook determines how guard variables are used. It should return
-@code{false} (the default) if first byte should be used. A return value of
-@code{true} indicates the least significant bit should be used.
+@code{false} (the default) if the first byte should be used. A return value of
+@code{true} indicates that only the least significant bit should be used.
@end deftypefn
@deftypefn {Target Hook} tree TARGET_CXX_GET_COOKIE_SIZE (tree @var{type})
range 0 to 15 with address space 0 being reserved for the generic
address space.
-@deftypefn {Target Hook} {bool} TARGET_ADDR_SPACE_LEGITIMATE_ADDRESS_P (enum machine_mode @var{mode}, rtx @var{exp}, bool @var{strict}, addr_space_t @var{as})
+@defmac TARGET_ADDR_SPACE_KEYWORDS
+A list of @code{ADDR_SPACE_KEYWORD} macros to define each named
+address keyword. The @code{ADDR_SPACE_KEYWORD} macro takes two
+arguments, the keyword string and the number of the named address
+space. For example, the SPU port uses the following to declare
+@code{__ea} as the keyword for named address space #1:
+@smallexample
+#define ADDR_SPACE_EA 1
+#define TARGET_ADDR_SPACE_KEYWORDS ADDR_SPACE_KEYWORD ("__ea", ADDR_SPACE_EA)
+@end smallexample
+@end defmac
+
+@deftypefn {Target Hook} {enum machine_mode} TARGET_ADDR_SPACE_POINTER_MODE (addr_space_t @var{address_space})
+Define this to return the machine mode to use for pointers to
+@var{address_space} if the target supports named address spaces.
+The default version of this hook returns @code{ptr_mode} for the
+generic address space only.
+@end deftypefn
+
+@deftypefn {Target Hook} {enum machine_mode} TARGET_ADDR_SPACE_ADDRESS_MODE (addr_space_t @var{address_space})
+Define this to return the machine mode to use for addresses in
+@var{address_space} if the target supports named address spaces.
+The default version of this hook returns @code{Pmode} for the
+generic address space only.
+@end deftypefn
+
+@deftypefn {Target Hook} bool TARGET_ADDR_SPACE_VALID_POINTER_MODE (enum machine_mode @var{mode}, addr_space_t @var{as})
+Define this to return nonzero if the port can handle pointers
+with machine mode @var{mode} to address space @var{as}. This target
+hook is the same as the @code{TARGET_VALID_POINTER_MODE} target hook,
+except that it includes explicit named address space support. The default
+version of this hook returns true for the modes returned by either the
+@code{TARGET_ADDR_SPACE_POINTER_MODE} or @code{TARGET_ADDR_SPACE_ADDRESS_MODE}
+target hooks for the given address space.
+@end deftypefn
+
+@deftypefn {Target Hook} bool TARGET_ADDR_SPACE_LEGITIMATE_ADDRESS_P (enum machine_mode @var{mode}, rtx @var{exp}, bool @var{strict}, addr_space_t @var{as})
Define this to return true if @var{exp} is a valid address for mode
@var{mode} in the named address space @var{as}. The @var{strict}
parameter says whether strict addressing is in effect after reload has
explicit named address space support.
@end deftypefn
-@deftypefn {Target Hook} {rtx} TARGET_ADDR_SPACE_LEGITIMIZE_ADDRESS (rtx @var{x}, rtx @var{oldx}, enum machine_mode @var{mode}, addr_space_t @var{as})
+@deftypefn {Target Hook} rtx TARGET_ADDR_SPACE_LEGITIMIZE_ADDRESS (rtx @var{x}, rtx @var{oldx}, enum machine_mode @var{mode}, addr_space_t @var{as})
Define this to modify an invalid address @var{x} to be a valid address
with mode @var{mode} in the named address space @var{as}. This target
hook is the same as the @code{TARGET_LEGITIMIZE_ADDRESS} target hook,
except that it includes explicit named address space support.
@end deftypefn
-@deftypefn {Target Hook} {bool} TARGET_ADDR_SPACE_SUBSET_P (addr_space_t @var{superset}, addr_space_t @var{subset})
+@deftypefn {Target Hook} bool TARGET_ADDR_SPACE_SUBSET_P (addr_space_t @var{superset}, addr_space_t @var{subset})
Define this to return whether the @var{subset} named address space is
contained within the @var{superset} named address space. Pointers to
a named address space that is a subset of another named address space
will be converted automatically without a cast if used together in
arithmetic operations. Pointers to a superset address space can be
-converted to pointers to a subset address space via explict casts.
+converted to pointers to a subset address space via explicit casts.
@end deftypefn
-@deftypefn {Target Hook} {rtx} TARGET_ADDR_SPACE_CONVERT (rtx @var{op}, tree @var{from_type}, tree @var{to_type})
+@deftypefn {Target Hook} rtx TARGET_ADDR_SPACE_CONVERT (rtx @var{op}, tree @var{from_type}, tree @var{to_type})
Define this to convert the pointer expression represented by the RTL
@var{op} with type @var{from_type} that points to a named address
space to a new pointer expression with type @var{to_type} that points
is in effect.
@end defmac
-@deftypefn {Target Hook} unsigned int TARGET_CASE_VALUES_THRESHOLD (void)
+@deftypefn {Target Hook} {unsigned int} TARGET_CASE_VALUES_THRESHOLD (void)
This function return the smallest number of different values for which it
is best to use a jump-table instead of a tree of conditional branches.
The default is four for machines with a @code{casesi} instruction and
unsigned one.
@end defmac
-@deftypefn {Target Hook} int TARGET_MIN_DIVISIONS_FOR_RECIP_MUL (enum machine_mode @var{mode})
+@deftypefn {Target Hook} {unsigned int} TARGET_MIN_DIVISIONS_FOR_RECIP_MUL (enum machine_mode @var{mode})
When @option{-ffast-math} is in effect, GCC tries to optimize
divisions by the same divisor, by turning them into multiplications by
the reciprocal. This target hook specifies the minimum number of divisions
@end defmac
@anchor{TARGET_SHIFT_TRUNCATION_MASK}
-@deftypefn {Target Hook} int TARGET_SHIFT_TRUNCATION_MASK (enum machine_mode @var{mode})
+@deftypefn {Target Hook} {unsigned HOST_WIDE_INT} TARGET_SHIFT_TRUNCATION_MASK (enum machine_mode @var{mode})
This function describes how the standard shift patterns for @var{mode}
deal with shifts by negative amounts or by more than the width of the mode.
@xref{shift patterns}.
representation this way so unlike @code{LOAD_EXTEND_OP},
@code{TARGET_MODE_REP_EXTENDED} is expected to return either
@code{SIGN_EXTEND} or @code{UNKNOWN}. Also no target extends
-@var{mode} to @var{mode_rep} so that @var{mode_rep} is not the next
+@var{mode} to @var{rep_mode} so that @var{rep_mode} is not the next
widest integral mode and currently we take advantage of this fact.)
Similarly to @code{LOAD_EXTEND_OP} you may return a non-@code{UNKNOWN}
arguments of @samp{#pragma pack}.
@end defmac
+@deftypevr {Target Hook} bool TARGET_HANDLE_PRAGMA_EXTERN_PREFIX
+True if @code{#pragma extern_prefix} is to be supported.
+@end deftypevr
+
@defmac TARGET_DEFAULT_PACK_STRUCT
If your target requires a structure packing default other than 0 (meaning
the machine default), define this macro to the necessary value (in bytes).
@samp{#pragma pack()} (that is, a small power of two).
@end defmac
-@findex #pragma
-@findex pragma
-@defmac HANDLE_PRAGMA_PUSH_POP_MACRO
-Define this macro if you want to support the Win32 style pragmas
-@samp{#pragma push_macro(macro-name-as-string)} and @samp{#pragma
-pop_macro(macro-name-as-string)}. The @samp{#pragma push_macro(
-macro-name-as-string)} pragma saves the named macro and via
-@samp{#pragma pop_macro(macro-name-as-string)} it will return to the
-previous value.
-@end defmac
-
-
@defmac DOLLARS_IN_IDENTIFIERS
Define this macro to control use of the character @samp{$} in
identifier names for the C family of languages. 0 means @samp{$} is
by the @code{IFCVT_INIT_EXTRA_FIELDS} macro.
@end defmac
-@deftypefn {Target Hook} void TARGET_MACHINE_DEPENDENT_REORG ()
+@deftypefn {Target Hook} void TARGET_MACHINE_DEPENDENT_REORG (void)
If non-null, this hook performs a target-specific pass over the
instruction stream. The compiler will run it at all optimization levels,
just before the point at which it normally does delayed-branch scheduling.
definition is null.
@end deftypefn
-@deftypefn {Target Hook} void TARGET_INIT_BUILTINS ()
+@deftypefn {Target Hook} void TARGET_INIT_BUILTINS (void)
Define this hook if you have any machine-specific built-in functions
that need to be defined. It should be a function that performs the
necessary setup.
@samp{TARGET_INIT_BUILTINS}.
@end deftypefn
-@deftypefn {Target Hook} tree TARGET_BUILTIN_FUNCTION (unsigned @var{code}, bool @var{initialize_p})
+@deftypefn {Target Hook} tree TARGET_BUILTIN_DECL (unsigned @var{code}, bool @var{initialize_p})
Define this hook if you have any machine-specific built-in functions
that need to be defined. It should be a function that returns the
builtin function declaration for the builtin function code @var{code}.
the value will be ignored.
@end deftypefn
-@deftypefn {Target Hook} const char * TARGET_INVALID_WITHIN_DOLOOP (rtx @var{insn})
+@deftypefn {Target Hook} {const char *} TARGET_INVALID_WITHIN_DOLOOP (const_rtx @var{insn})
Take an instruction in @var{insn} and return NULL if it is valid within a
-low-overhead loop, otherwise return a string why doloop could not be applied.
+low-overhead loop, otherwise return a string explaining why doloop
+could not be applied.
Many targets use special registers for low-overhead looping. For any
instruction that clobbers these this function should return a string indicating
may in turn cause a branch offset to overflow.
@end defmac
-@deftypefn {Target Hook} bool TARGET_COMMUTATIVE_P (rtx @var{x}, @var{outer_code})
+@deftypefn {Target Hook} bool TARGET_COMMUTATIVE_P (const_rtx @var{x}, int @var{outer_code})
This target hook returns @code{true} if @var{x} is considered to be commutative.
Usually, this is just COMMUTATIVE_P (@var{x}), but the HP PA doesn't consider
PLUS to be commutative inside a MEM@. @var{outer_code} is the rtx code
some parts of the back end. The hook function is not invoked in this
situation; you need not worry about the hook being invoked recursively,
or when the back end is in a partially-initialized state.
+@code{cfun} might be @code{NULL} to indicate processing at top level,
+outside of any function scope.
@end deftypefn
@defmac TARGET_OBJECT_SUFFIX
@end smallexample
@end deftypefn
-@deftypefn {Target Hook} int TARGET_BRANCH_TARGET_REGISTER_CLASS (void)
+@deftypefn {Target Hook} {enum reg_class} TARGET_BRANCH_TARGET_REGISTER_CLASS (void)
This target hook returns a register class for which branch target register
optimizations should be applied. All registers in this class should be
usable interchangeably. After reload, registers in this class will be
to reserve space for caller-saved target registers.
@end deftypefn
+@deftypefn {Target Hook} bool TARGET_HAVE_CONDITIONAL_EXECUTION (void)
+This target hook returns true if the target supports conditional execution.
+This target hook is required only when the target has several different
+modes and they have different conditional execution capability, such as ARM.
+@end deftypefn
+
@defmac POWI_MAX_MULTS
If defined, this macro is interpreted as a signed integer C expression
that specifies the maximum number of floating point multiplications
that are different from @option{-I}.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_USE_LOCAL_THUNK_ALIAS_P (tree @var{fndecl})
-This target hook returns @code{true} if it is safe to use a local alias
+@defmac bool TARGET_USE_LOCAL_THUNK_ALIAS_P (tree @var{fndecl})
+This target macro returns @code{true} if it is safe to use a local alias
for a virtual function @var{fndecl} when constructing thunks,
-@code{false} otherwise. By default, the hook returns @code{true} for all
+@code{false} otherwise. By default, the macro returns @code{true} for all
functions, if a target supports aliases (i.e.@: defines
@code{ASM_OUTPUT_DEF}), @code{false} otherwise,
-@end deftypefn
+@end defmac
@defmac TARGET_FORMAT_TYPES
If defined, this macro is the name of a global variable containing
and scanf formatter settings.
@end defmac
-@deftypefn {Target Hook} bool TARGET_RELAXED_ORDERING
+@deftypevr {Target Hook} bool TARGET_RELAXED_ORDERING
If set to @code{true}, means that the target's memory model does not
guarantee that loads which do not depend on one another will access
main memory in the order of the instruction stream; if ordering is
many recent processors which implement a policy of ``relaxed,''
``weak,'' or ``release'' memory consistency, such as Alpha, PowerPC,
and ia64. The default is @code{false}.
-@end deftypefn
+@end deftypevr
-@deftypefn {Target Hook} const char *TARGET_INVALID_ARG_FOR_UNPROTOTYPED_FN (tree @var{typelist}, tree @var{funcdecl}, tree @var{val})
+@deftypefn {Target Hook} {const char *} TARGET_INVALID_ARG_FOR_UNPROTOTYPED_FN (const_tree @var{typelist}, const_tree @var{funcdecl}, const_tree @var{val})
If defined, this macro returns the diagnostic message when it is
illegal to pass argument @var{val} to function @var{funcdecl}
with prototype @var{typelist}.
@end deftypefn
-@deftypefn {Target Hook} {const char *} TARGET_INVALID_CONVERSION (tree @var{fromtype}, tree @var{totype})
+@deftypefn {Target Hook} {const char *} TARGET_INVALID_CONVERSION (const_tree @var{fromtype}, const_tree @var{totype})
If defined, this macro returns the diagnostic message when it is
invalid to convert from @var{fromtype} to @var{totype}, or @code{NULL}
if validity should be determined by the front end.
@end deftypefn
-@deftypefn {Target Hook} {const char *} TARGET_INVALID_UNARY_OP (int @var{op}, tree @var{type})
+@deftypefn {Target Hook} {const char *} TARGET_INVALID_UNARY_OP (int @var{op}, const_tree @var{type})
If defined, this macro returns the diagnostic message when it is
invalid to apply operation @var{op} (where unary plus is denoted by
@code{CONVERT_EXPR}) to an operand of type @var{type}, or @code{NULL}
if validity should be determined by the front end.
@end deftypefn
-@deftypefn {Target Hook} {const char *} TARGET_INVALID_BINARY_OP (int @var{op}, tree @var{type1}, tree @var{type2})
+@deftypefn {Target Hook} {const char *} TARGET_INVALID_BINARY_OP (int @var{op}, const_tree @var{type1}, const_tree @var{type2})
If defined, this macro returns the diagnostic message when it is
invalid to apply operation @var{op} to operands of types @var{type1}
and @var{type2}, or @code{NULL} if validity should be determined by
the front end.
@end deftypefn
-@deftypefn {Target Hook} {const char *} TARGET_INVALID_PARAMETER_TYPE (tree @var{type})
+@deftypefn {Target Hook} {const char *} TARGET_INVALID_PARAMETER_TYPE (const_tree @var{type})
If defined, this macro returns the diagnostic message when it is
invalid for functions to include parameters of type @var{type},
or @code{NULL} if validity should be determined by
the front end. This is currently used only by the C and C++ front ends.
@end deftypefn
-@deftypefn {Target Hook} {const char *} TARGET_INVALID_RETURN_TYPE (tree @var{type})
+@deftypefn {Target Hook} {const char *} TARGET_INVALID_RETURN_TYPE (const_tree @var{type})
If defined, this macro returns the diagnostic message when it is
invalid for functions to have return type @var{type},
or @code{NULL} if validity should be determined by
the front end. This is currently used only by the C and C++ front ends.
@end deftypefn
-@deftypefn {Target Hook} {tree} TARGET_PROMOTED_TYPE (tree @var{type})
+@deftypefn {Target Hook} tree TARGET_PROMOTED_TYPE (const_tree @var{type})
If defined, this target hook returns the type to which values of
@var{type} should be promoted when they appear in expressions,
analogous to the integer promotions, or @code{NULL_TREE} to use the
This is currently used only by the C and C++ front ends.
@end deftypefn
-@deftypefn {Target Hook} {tree} TARGET_CONVERT_TO_TYPE (tree @var{type}, tree @var{expr})
+@deftypefn {Target Hook} tree TARGET_CONVERT_TO_TYPE (tree @var{type}, tree @var{expr})
If defined, this hook returns the result of converting @var{expr} to
@var{type}. It should return the converted expression,
or @code{NULL_TREE} to apply the front end's normal conversion rules.
@end deftypefn
@deftypefn {Target Hook} rtx TARGET_GET_DRAP_RTX (void)
-Define this macro to an rtx for Dynamic Realign Argument Pointer if a
+This hook should return an rtx for Dynamic Realign Argument Pointer (DRAP) if a
different argument pointer register is needed to access the function's
-argument list when stack is aligned.
+argument list due to stack realignment. Return @code{NULL} if no DRAP
+is needed.
@end deftypefn
-@deftypefn {Target Hook} {bool} TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS (void)
+@deftypefn {Target Hook} bool TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS (void)
When optimization is disabled, this hook indicates whether or not
arguments should be allocated to stack slots. Normally, GCC allocates
stacks slots for arguments when not optimizing in order to make
a constant. If there is another constant already in a register that
is close enough in value then it is preferable that the new constant
is computed from this register using immediate addition or
-substraction. We accomplish this through CSE. Besides the value of
+subtraction. We accomplish this through CSE. Besides the value of
the constant we also add a lower and an upper constant anchor to the
available expressions. These are then queried when encountering new
constants. The anchors are computed by rounding the constant up and